UMA02040E2492AA300 [VISHAY]
RESISTOR, THIN FILM, 0.25 W, 0.05 %, 15 ppm, 24900 ohm, SURFACE MOUNT, 1406, MELF, ROHS COMPLIANT;
| 型号： | UMA02040E2492AA300 |
| 厂家： | 
VISHAY |
| 描述： | RESISTOR, THIN FILM, 0.25 W, 0.05 %, 15 ppm, 24900 ohm, SURFACE MOUNT, 1406, MELF, ROHS COMPLIANT 电阻器 |
| 文件： | 总10页 (文件大小：167K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UMA 0204
Vishay Beyschlag
High Precision MINI-MELF Resistor
FEATURES
Approved to EN 140401-803
Most advanced thin film technology
Superior overall stability
TCR down to 5 ppm/K
High precision tolerance down to 0.02 %
Matte Sn termination on Ni barrier layer
Compliant to RoHS Directive 2011/65/EU
APPLICATIONS
Measuring and calibration equipment
UMA 0204 high precision thin film MINI-MELF resistors
combine the proven reliability of professional MELF products
with a most advanced level of precision and stability first
achieved with axial thin film high precision resistors. This
unique combination makes the product perfectly suited for all
applications with outstanding requirements towards reliable
precision and stability.
Industrial process control systems
Space and aircraft electronics
METRIC SIZE
DIN
0204
CECC
RC 3715M
TECHNICAL SPECIFICATIONS
DESCRIPTION
UMA 0204
RC 3715M
Metric CECC size
Resistance range
22 to 332 k
Resistance tolerance
Temperature coefficient
Operation mode
0.25 %; 0.1 %; 0.05 %; 0.02 %
15 ppm/K; 10 ppm/K; 5 ppm/K
Precision
Standard
0.25 W
(1)
Rated dissipation, P70
0.07 W
Operating voltage, Umax. AC/DC
Permissible film temperature, F max.
Operating temperature range
200 V
85 °C
125 °C
- 10 °C to 85 °C
- 55 °C to 125 °C
Max. resistance change at P70 for resistance range,
R/R max., after:
22 to 332 k
1000 h
0.02 %
0.05 %
0.15 %
0.05 %
0.1 %
0.3 %
8000 h
225 000 h
Permissible voltage against ambient (insulation):
Failure rate: FITobserved
1 min; Uins
300 V
75 V
0.1 x 10-9/h
Continuous
Notes
•
These resistors do not feature a limited lifetime when operated within the permissible limits. However, resistance value drift increasing over
operating time may result in exceeding a limit acceptable to the specific application, thereby establishing a functional lifetime.
(1) The power dissipation on the resistor generates a temperature rise against the local ambient, depending on the heatflow support of the
printed-circuit board (thermal resistance). The rated dissipation applies only if the permitted film temperature is not exceeded.
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Document Number: 28715
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THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
UMA 0204
High Precision MINI-MELF Resistor
Vishay Beyschlag
DIMENSIONS
L
K
L1
D
D1
DIMENSIONS AND MASS
L
D
(mm)
L1 min.
(mm)
D1
(mm)
K
(mm)
MASS
(mg)
TYPE
(mm)
UMA 0204
Note
3.6 + 0/- 0.2
1.4 + 0/- 0.1
1.8
D + 0/- 0.15
0.8 0.1
22
• Color code marking is applied according to IEC 60062 (3) in five bands. Each color band appears as a single solid line, voids are permissible
if at least 2/3 of the band is visible from each radial angle of view. The last color band for tolerance is approximately 50 % wider than the other
bands. An interrupted band between the 4th and 5th full band indicates the temperature coefficient (orange = TC15, blue = TC10, violett = TC05).
PATTERN STYLES FOR MELF RESISTORS
X
G
Y
Z
RECOMMENDED SOLDER PAD DIMENSIONS
WAVE SOLDERING
REFLOW SOLDERING
TYPE
G
Y
X
Z
G
Y
X
Z
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
(mm)
UMA 0204
Note
1.5
1.5
1.8
4.5
1.7
1.2
1.6
4.1
• The given solder pad dimensions reflect the considerations for board design and assembly as outlined e.g. in standards IEC 61188-5-x, or in
publication IPC-7351. They do not guarantee any supposed thermal properties, however, they will be found adequate for most general
applications.
Document Number: 28715
Revision: 20-Feb-12
For technical questions, contact: melf@vishay.com
This document is subject to change without notice.
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THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
UMA 0204
High Precision MINI-MELF Resistor
Vishay Beyschlag
PART NUMBER AND PRODUCT DESCRIPTION
Part Number: UMA02040G4641AA300
U
M
A
0
2
0
4
0
G
4
6
4
1
A
A
3
0
0
TYPE/SIZE
VERSION
TCR
RESISTANCE
TOLERANCE
PACKAGING
UMA0204
0 = Standard
G = 5 ppm/K
F = 10 ppm/K
E = 15 ppm/K
3 digit value
1 digit multiplier
Multiplier
9 = *10-1
H = 0.02 %
A = 0.05 %
B = 0.1 %
C = 0.25 %
AU
A1
A3
A0
0 = *100
1 = *101
2 = *102
3 = *103
Product Description: UMA 0204 - 05 0.05 % AL 4K64
UMA
0204
- 05
0.05 %
AL
4K64
TYPE
SIZE
TCR
TOLERANCE
PACKAGING
RESISTANCE
UMA
0204
05 ppm/K
10 ppm/K
15 ppm/K
0.02 %
0.05 %
0.1 %
AU
A1
AL
A0
4K64 = 4.64 k
0.25 %
Notes
• Products can be ordered using either the PART NUMBER or the PRODUCT DESCRIPTION.
• The standard version includes approval to EN 140401-803, “Version A”, for selected ranges.
PACKAGING
TYPE
CODE
AU
QUANTITY
100
CARRIER TAPE
WIDTH
PITCH
REEL DIAMETER
Box
Antistatic blister tape
acc. IEC 60286-3
type II
A1
1000
UMA 0204
8 mm
4 mm
180 mm/7"
A3 = AL
A0
3000
330 mm/13"
10 000
TEMPERATURE COEFFICIENT AND RESISTANCE RANGE
DESCRIPTION
RESISTANCE
TCR
TOLERANCE
UMA 0204
15 ppm/K
0.05 %
0.25 %
0.1 %
47 to 332 k
22 to 332 k
43 to 332 k
75 to 221 k
33 to 221 k
56 to 221 k
75 to 150 k
75 to 100 k
10 ppm/K
05 ppm/K
0.05 %
0.25 %
0.1 %
0.05 %
0.02 %
Notes
• Resistance values to be selected from E192 series, for other values please contact the factory.
• TCR 10 and TCR 05 is specified over the temperature range from - 10 °C to + 85 °C.
• Approval to EN 140401-803, “Version A” is achieved for TCR 10 with 0.25 % and 0.1 %
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For technical questions, contact: melf@vishay.com
This document is subject to change without notice.
Document Number: 28715
Revision: 20-Feb-12
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
UMA 0204
High Precision MINI-MELF Resistor
Vishay Beyschlag
(1)
DESCRIPTION
Production is strictly controlled and follows an extensive
All products comply with the GADSL
CEFIC- EECA-EICTA
and the
(2)
list of legal restrictions on
hazardous substances. This includes full compliance with
the following directives:
set of instructions established for reproducibility.
A
homogeneous film of metal alloy is deposited on a high grade
ceramic body (Al2O3) and conditioned to achieve the desired
temperature stability. Nickel plated steel terminations are
firmly pressed on the metallised rods. A special laser is used
to achieve the target value by smoothly cutting in the
resistive layer without damaging the ceramics. A further
conditioning is applied in order to stabilise the trimming
result. The resistor elements are covered by a protective
coating designed for electrical, mechanical and climatic
protection. The terminations receive a final pure tin on nickel
plating. Five colour rings designate the resistance value and
tolerance in accordance with IEC 60062 (3). Additional colour
dots near the fourth ring are used to identify the temperature
coefficient.
2000/53/EC End of Vehicle life Directive (ELV) and Annex II
(ELV II)
2011/65/EU Restriction of the use of Hazardous
Substances Directive (RoHS)
2002/96/EC Waste Electrical and Electronic Equipment
Directive (WEEE)
APPROVALS
Where applicable the resistors are approved within the
IECQ-CECC Quality Assessment System for Electronic
Components to the detail specification EN 140401-803
which refers to EN 60115-1, EN 140400 and the variety of
environmental test procedures of the IEC 60068 (3) series.
The result of the determined production is verified by
an extensive testing procedure under strict temperature
control, performed on 100 % of the individual resistors. This
includes pulse load screening (for R 10 ) and additional
non-linearity screening (for R 30 ) for the elimination of
products with a potential risk of early life failures according to
EN 140401-803, 2.1.2.2. Only accepted products are laid
directly into the antistatic blister tape in accordance with
Conformity is attested by the use of the CECC logo (
the mark of conformity on the package label.
) as
Vishay BEYSCHLAG has achieved “Approval of
Manufacturer” in accordance with IEC QC 001002-3,
clause 2. The release certificate for “Technology Approval
Schedule” in accordance with CECC 240001 based on
IEC 60286-3, Type II (3)
.
IEC QC 001002-3, clause
6
is granted for the
Vishay BEYSCHLAG manufacturing process.
ASSEMBLY
The resistors are suitable for processing on automatic SMD
assembly systems. They are suitable for automatic soldering
using wave, reflow or vapour phase as shown in
IEC 61760-1 (3). Solderability is specified for 2 years after
production or requalification, however, excellent solderability
is proven after extended storage in excess of 10 years. The
permitted storage time is 20 years.
RELATED PRODUCTS
For thin film products with a wider range or TCR, tolerance
and resistance, see this datasheets:
“Professional MELF Resistors”
(www.vishay.com/doc?28713)
“Precision MELF Resistors”
(www.vishay.com/doc?28714)
The resistors are completely lead (Pb)-free, the pure tin
plating provides compatibility with lead (Pb)-free soldering
processes. The immunity of the plating against tin whisker
growth has been proven under extensive testing.
The encapsulation is resistant to all cleaning solvents
commonly used in the electronics industry, including
alcohols, esters and aqueous solutions. The suitability of
conformal coatings, if applied, shall be qualified by
appropriate means to ensure the long-term stability of the
whole system.
Notes
(1)
Global Automotive Declarable Substance List, see www.gadsl.org.
(2)
CEFIC (European Chemical Industry Council), EECA (European Electronic Component Manufacturers Association), EICTA (European trade
organisation representing the information and communications technology and consumer electronics), see www.eicta.org/index.php?id=995
issues environment policy chemicals chemicals for electronics.
(3)
The quoted IEC standards are also released as EN standards with the same number and identical contents.
Document Number: 28715
Revision: 20-Feb-12
For technical questions, contact: melf@vishay.com
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This document is subject to change without notice.
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
UMA 0204
High Precision MINI-MELF Resistor
Vishay Beyschlag
FUNCTIONAL PERFORMANCE
0.10
W
UMA 0204
0.08
0.06
0.04
0.02
0
- 50
0
50
70
100
°C
150
Ambient Temperature ϑamb
Derating - Precision Operation
0.3
UMA 0204
W
0.2
0.1
0
- 50
0
50
70
100
°C
150
Ambient Temperature ϑamb
Derating - Standard Operation
1
µV/
V
0.1
UMA 0204
0.01
100 Ω
1 kΩ
10 kΩ
100 kΩ
1 MΩ
10 MΩ
Resistance Value R
In accordance with IEC 60195
Current Noise - A
1
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This document is subject to change without notice.
Document Number: 28715
Revision: 20-Feb-12
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
UMA 0204
High Precision MINI-MELF Resistor
Vishay Beyschlag
TESTS AND REQUIREMENTS
All tests are carried out in accordance with the following
specifications:
Unless otherwise specified the following values apply:
Temperature: 15 °C to 35 °C
EN 60115-1, generic specification
EN 140400, sectional specification
EN 140401-803, detail specification
Relative humidity: 45 % to 75 %
Air pressure: 86 kPa to 106 kPa (860 mbar to 1060 mbar).
The components are mounted for testing on printed-circuit
boards in accordance with EN 140400, 2.3.3, unless
otherwise specified.
The components are approved in accordance with the
IECQ-CECC-system, where applicable. For the full test
schedule refer to the documents listed above. The testing
also covers most of the requirements specified by
EIA/IS-703 and JIS-C-5202.
The requirements stated below are based on the required
tests and permitted limits of EN 140401-803. However, some
additional tests and a number of improvements against those
minimum requirements have been included. The stated
requirements for long-term tests are typically fulfilled with a
statistical safety of at least x + 5 s.
The tests are carried out under standard atmospheric
conditions in accordance with IEC 60068-1, 5.3 (3). Climatic
category LCT/UCT/56 (rated temperature range: Lower
category temperature, upper category temperature; damp
heat, steady state, duration: 56 days) is valid.
TEST PROCEDURES AND REQUIREMENTS
REQUIREMENTS
PERMISSIBLE CHANGE (R)
IEC
EN
60068-2 (3)
60115-1
CLAUSE
TEST
PROCEDURE
STABILITY
CLASS 0.05
OR BETTER
STABILITY
CLASS 0.1
OR BETTER
STABILITY
CLASS 0.25
OR BETTER
TEST
METHOD
Stability for product types:
UMA 0204
100 to 100 k
43 to 221 k
22 to 332 k
4.5
-
-
Resistance
-
0.25 % R; 0.1 % R; 0.05 % R; 0.02 % R
At (20/- 10/20) C
and (20/85/20) C
10 ppm/K; 05 ppm/K
Temperature
coefficient
4.8.4.2
At (20/- 55/20) C
and (20/125/20) C
15 ppm/K
Endurance
at 70 C:
U = P70 x R Umax.
;
Precision operation
1.5 h on; 0.5 h off;
mode
70 C; 1000 h
70 C; 8000 h
(0.02 %
(0.05 %
R
R
+ 1 m)
+ 1 m)
4.25.1
-
U = P70 x R Umax.
1.5 h on; 0.5 h off;
;
Endurance
at 70 C:
Standard operating
70 C; 1000 h
70 C; 8000 h
85 C; 1000 h
(0.05 %
(0.1 %
R
+ 1 m)
mode
R
+ 1 m)
Endurance at upper
category
(0.01 %
(0.05 %
R
R
+ 1 m
)
)
(0.05 %
R
+ 1 m
)
(0.1 %
R
+ 1 m)
4.25.3
4.24
-
125 C; 1000 h
+ 1 m
(0.1 %
R
+ 1 m
)
(0.15 %
R
+ 1 m
)
temperature
Damp heat,
steady state
(40 2) C; 56 days;
78 (Cab)
(0.03 %
R
+ 1 m
)
(0.05 %
R
+ 1 m
)
(0.1 % R + 1 m
)
(93 3) % RH
(85 2) C;
(85 5) % RH;
U = 0.3 x P70 x R 100 V;
Damp heat,
steady state,
accelerated
4.39
67 (Cy)
(0.1 %
R
+ 1 m)
(0.25 % R + 1 m)
1000 h
Document Number: 28715
Revision: 20-Feb-12
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This document is subject to change without notice.
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THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
UMA 0204
High Precision MINI-MELF Resistor
Vishay Beyschlag
TEST PROCEDURES AND REQUIREMENTS
REQUIREMENTS
PERMISSIBLE CHANGE (R)
IEC
EN
60068-2 (3)
60115-1
CLAUSE
TEST
PROCEDURE
STABILITY
CLASS 0.05
OR BETTER
STABILITY
CLASS 0.1
OR BETTER
STABILITY
CLASS 0.25
OR BETTER
TEST
METHOD
Stability for product types:
UMA 0204
100 to 100 k
43 to 221 k
22 to 332 k
4.23
Climatic sequence:
dry heat
4.23.2
2 (Bb)
UCT; 16 h
55 C; 24 h; 90 % RH;
4.23.3
30 (Db)
damp heat, cyclic
1 cycle
4.23.4
4.23.5
1 (Ab)
13 (M)
cold
LCT C; 2 h
low air pressure
8.5 kPa; 2 h; (25 10) C
55 C; 24 h; 90 % RH;
4.23.6
4.23.7
30 (Db)
-
damp heat, cyclic
DC load
5 cycles
U = P70 x R Umax.; 1 min.
LCT = - 10 C; UCT = 85 C
LCT = - 55 C; UCT = 125 C
- 55 C; 2 h
(0.03 %
R
+ 1 m
)
(0.05 %
R
+ 1 m)
-
-
-
(0.1 %
R
+ 1 m)
-
1 (Ab)
Cold
(0.02 % R + 1 m)
30 min at LCT;
30 min at UCT;
LCT = - 10 C;
UCT = 85 C
Rapid change of
temperature
5 cycles
1000 cycles
(0.01 %
(0.05 %
R
R
+ 1 m
+ 1 m
)
)
(0.02 %
(0.05 %
R
R
+ 1 m
)
)
-
-
4.19
14 (Na)
+ 1 m
LCT = - 55 C; UCT = 125 C
5 cycles
-
-
(0.025 %
R
+ 1 m)
1000 cycles
-
-
(0.1 %
R
+ 1 m)
Short time overload;
precision operation
mode
U = 2.5 x P70 x R
2 x Umax.
;
(0.005 %
R
+ 1 m
)
(0.01 %
R
+ 1 m)
5 s
4.13
-
Short time overload;
standard operation
mode
U = 2.5 x P70 x R
2 x Umax.
;
(0.01 %
R
+ 1 m)
5 s
severity no. 4:
U = 10 x P70 x R
Single pulse high
voltage overload;
standard mode
4.27
4.37
-
-
(0.25 %
(0.5 %
R
+ 5 m) (1)
2 x Umax.
;
10 pulses 10 s/700 s
Periodic electric
overload;
U = 15 x P70 x R
2 x Umax.
;
R
+ 5 m) (1)
standard mode
0.1 s on; 2.5 s off; 1000 cycles
Endurance by sweeping;
10 Hz to 2000 Hz;
no resonance; amplitude
1.5 mm or
4.22
4.40
6 (Fc)
Vibration
(0.01 % R + 1 m)
200 m/s2; 7.5 h
Electrostatic
discharge
(Human Body
Model)
IEC 61340-3-1 (3)
;
-
3 pos. + 3 neg. discharges
UMA 0204: 2 kV
(0.5 % R
+ 50 m) (1)
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This document is subject to change without notice.
Document Number: 28715
Revision: 20-Feb-12
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
UMA 0204
High Precision MINI-MELF Resistor
Vishay Beyschlag
TEST PROCEDURES AND REQUIREMENTS
REQUIREMENTS
PERMISSIBLE CHANGE (R)
IEC
EN
60068-2 (3)
TEST
60115-1
CLAUSE
TEST
PROCEDURE
STABILITY
CLASS 0.05
OR BETTER
STABILITY
CLASS 0.1
OR BETTER
STABILITY
CLASS 0.25
OR BETTER
METHOD
Stability for product types:
UMA 0204
100 to 100 k
43 to 221 k
22 to 332 k
Solder bath method;
SnPb40;
non-activated flux;
(215 3) C; (3 0.3) s
Good tinning ( 95 % covered); no visible damage
Good tinning ( 95 % covered); no visible damage
4.17.2
58 (Td)
Solderability
Solder bath method;
SnAg3Cu0.5 or SnAg3.5;
non-activated flux;
(235 3) C; (2 0.2) s
Solder bath method;
(260 5) C; (10 1) s
Note (2)
(0.05 % R + 10 m)
Resistance to
soldering heat
4.18.2
4.29
58 (Td)
45 (XA)
Reflow method 2
(IR/forced gas convention)
(260 5) C; (10 1) s
(0.01 %
R
+ 1 m)
(0.02 % R + 1 m)
Component solvent
resistance
Isopropyl alcohol; 50 C;
No visible damage
method 2
Solvent resistance
of marking
Isopropyl alcohol; 50 C;
method 1, toothbrush
4.30
4.32
45 (XA)
Marking legible; no visible damage
No visible damage
21 (Ue3)
Shear (adhesion)
Substrate bending
Voltage proof
45 N
No visible damage, no open circuit in bent position
(0.02 % + 10 m) (0.05 % R + 10 m)
4.33
4.7
21 (Ue1)
-
Depth 2 mm, 3 times
URMS = Uins; 60 s
R
No flashover or breakdown
IEC 60 695-11-5 (3)
needle flame test;
10 s
,
4.35
-
Flammability
No burning after 30 s
Notes
(1) The pulse load stability of professional MELF resistors applies also to high precision resistors. However, severe pulse loads are likely to
jeopardize high precision stability requirements.
(2) Wave soldering is not recommended.
(3) The quoted IEC standards are also released as EN standards with the same number and identical contents.
Document Number: 28715
Revision: 20-Feb-12
For technical questions, contact: melf@vishay.com
This document is subject to change without notice.
www.vishay.com
57
THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
UMA 0204
High Precision MINI-MELF Resistor
Vishay Beyschlag
HISTORICAL 12NC INFORMATION
Last Digit of 12NC Indicating Resistance Decade
The resistors had a 12-digit numeric code starting with
2312.
RESISTANCE DECADE
10 to 99.9
LAST DIGIT
9
1
2
3
4
The subsequent 4 digits indicated the resistor type,
specification and packaging; see the 12NC table.
100 to 999
1 to 9.99 k
The remaining 4 digits indicated the resistance value:
10 to 99.9 k
- The first 3 digits indicated the resistance value.
100 to 999 k
- The last digit indicated the resistance decade in
accordance with the 12NC Indicating Resistance Decade
table.
Historical 12NC Example
The 12NC of an UMA 0204 resistor, value 4.75 k and
TCR 05 with 0.05 % tolerance, supplied in antistatic blister
tape of 3000 units per reel was: 2312 113 44752.
HISTORICAL 12NC - Resistor type and packaging
2312 ... .....
DESCRIPTION
ANTISTATIC BLISTER TAPE
ANTISTATIC BLISTER TAPE ON REEL
AU
A1
AL
3000 units
A0
TYPE
TCR
TOL.
100 units
101 4....
101 91...
102 2....
102 3....
102 4....
102 91...
103 2....
103 3....
103 4....
103 6....
103 91...
1000 units
106 4....
106 91...
107 2....
107 3....
107 4....
107 91...
108 2....
108 3....
108 4....
108 6....
108 91...
10 000 units
116 4....
116 91...
117 2....
117 3....
117 4....
117 91...
118 2....
118 3....
118 4....
118 6....
118 91...
0.05 %
Note (1)
0.25 %
0.1 %
111 4....
111 91...
112 2....
112 3....
112 4....
112 91...
113 2....
113 3....
113 4....
113 6....
113 91...
15 ppm/K
10 ppm/K
0.05 %
Note (1)
0.25 %
0.1 %
UMA 0204
5 ppm/K
0.05 %
0.02 %
Note (1)
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Document Number: 28715
Revision: 20-Feb-12
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of June 8, 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment
(EEE) - recast, unless otherwise specified as non-compliant.
Please note that some Vishay documentation may still make reference to RoHS Directive 2002/95/EC. We confirm that
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Revision: 12-Mar-12
Document Number: 91000
1
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