MF12 [ETC]
Metal Film Resistors; 金属膜电阻器
| 型号： | MF12 |
| 厂家： | 
ETC |
| 描述： | Metal Film Resistors |
| 文件： | 总5页 (文件大小：229K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MF12, MF25 & MF50 Series
Metal Film Resistors
Materials and Features:
• EIA standard colour-coding.
• Low noise and voltage coefficient.
• Low temperature coefficient range.
• Nichrome resistor element provides stable performance in various environments.
• Multiple epoxy coating on vacuum-deposited metal film provides superior moisture protection.
Dimension:
Power Rating
+0.02
-0.05
Style
at 70°C
(W)
D Maximum
L Maximum
d
H±3
MF 12
MF 25
MF 50
0.125
0.25
0.5
1.85
2.5
3.5
6.8
0.45
28.0
0.54
3.5
10.0
Dimensions : Millimetres
Supplied bandoliered on tape (Box = 5000 pcs. for MF12 and MF25 Series)
(Box = 1000 pcs. for MF50 Series).
General Specification
Dielectric
withstanding
voltage (V)
Maximum
working
Maximum
overload
Resistance
Temperature
Coefficient
Resistance
Range
Style
Tolerance
voltage (V)
voltage (V)
MF 12
MF 25
MF 50
400
500
700
200
250
350
400
500
700
±1%
±50ppm/°C
1Ω to 1MΩ
Dimensions : Millimetres
Page 1
10/05/05 V1.0
MF12, MF25 & MF50 Series
Metal Film Resistors
Current Noise Level
Derating Curve
Load Life
+0.8
+0.4
0
-0.4
-0.8
100Ω
1KΩ
10KΩ
100KΩ
1MΩ
Nominal resistance (Ω)
Ambient temperature (°C)
Performance Specification
Characteristics
Test Methods
Limits
Natural resistance change per temperature degree centigrade.
Within the temperature coefficient specified
below
R2 - R1
X 106 (ppm/°C)
Temperature
coefficient
R1 t2-t1
(
)
Maximum TCR
R1: Resistance value at room temperature (t1)
±50ppm/°C
R2: Resistance value at room temperature plus 100°C (t2).
Dielectric
withstanding
voltage
Resistors shall be clamped in the trough of a 90° metallic
V-block and shall be tested at AC potential respectively
specified in the above list for 60 +10/-0 seconds.
No evidence of flashover mechanical
damage, arcing or insulation break down.
Resistance change after continuous five cycles for duty cycle
specified
Step
Temperature
-55°C ±3°C
Time
1
2
30 minutes
10-15 minutes
Temperature
cycling
Resistance change rate is ±(1% +0.05Ω).
No evidence of mechanical damage.
Room temperature
3
4
+155°C ±3°C
30 minutes
Room temperature
10-15 minutes
Short-time
overload
Permanent resistance change after the application of a
potential of 2.5 times RCWV for 5 seconds.
Resistance change rate is ±(0.5% +0.05Ω).
No evidence of mechanical damage.
Resistance change after 10,000 cycles (1 second "on", 25
seconds "off") at 4 times RCWV.
Resistance change rate is ±(1% +0.05Ω).
Pulse overload
No evidence of mechanical damage.
Page 2
10/05/05 V1.0
MF12, MF25 & MF50 Series
Metal Film Resistors
Performance Specification
Characteristics
Test Methods
Limits
Resistance Value
∆R/R
±1.5%
∆R/R
Resistance change after 1000 hours (1.5 hours "on", 0.5
hour "off") at RCWV in a humidity test chamber controlled at
40°C ±2°C and 90 to 95% relative humidity.
Load life in humidity
Normal type
Resistance Value
Normal type
Permanent resistance change after 1000 hours operating at
RCWV with duty cycle of 1.5 hours "on" 0.5 hours "off" at
70°C ±2°C ambient.
Load life
±1.5%
Direct Load: Resistance to a 2.5kgs direct load for 10
seconds in the direction of the longitudinal axis of the
terminal leads.
Terminal strength
Twist test: Terminal leads shall be bent through 90° at a
point of about 6mm from the body of the resistor and shall
be rotated through 360° about the original axis of the bent
terminal in alternating direction for a total of 3 rotations.
No evidence of mechanical damage.
Permanent resistance change when leads immersed to
3.2 - 4.8mm from the body in 350°C ±10°C solder for
3 ±0.5 seconds.
Resistance change rate is ±(1% +0.05Ω).
No evidence of mechanical damage.
Resistance to
soldering heat
The area covered with a new, smooth, clean, shiny and
continuous surface free from concentrated pinholes.
Solderability
95% coverage Minimum.
Test temperature of solder
Dwell time in solder
: 235°C ±5°C.
: 3+0.5/-0 seconds.
Specimens shall be immersed in a bath of trichroethane
completely for 3 minutes with ultrasonic.
No deterioration of protective coating and
markings.
Resistance to
solvent
RCWV = Rated Continuous Working Voltage = √ Rated Power X Resistance Value
Page 3
10/05/05 V1.0
MF12, MF25 & MF50 Series
Metal Film Resistors
Part Number Explanation:
MF
12
1R5
Type
Wattage Rating
OHMIC Values
Wattage Rating : 12 = 0.125W, 25 = 0.25W and 50 = 0.5W.
OHMIC Values : Where R = Ohms = Ω
K = Kilo ohms = KΩ.
M = Mega ohms = MΩ.
and replaces the decimal point.
eg :1R5 = 1.5Ω.
4K5 = 4.5KΩ.
6M8 = 6.8MΩ.
Stocked Values
Tolerance
1%
Wattage
0.125W
0.25W
0.5W
Range Value
1R - 1M
1%
1R - 1M
1%
1R - 1M
Page 4
10/05/05 V1.0
MF12, MF25 & MF50 Series
Metal Film Resistors
Notes:
International Sales Offices:
AUSTRALIA – Farnell InOne
Tel No: ++ 61 2 9645 8888
Fax No: ++ 61 2 9644 7898
FINLAND – Farnell InOne
Tel No: ++ 358 9 560 7780
Fax No: ++ 358 9 345 5411
NETHERLANDS – Farnell InOne
Tel No: ++ 31 30 241 7373
Fax No: ++ 31 30 241 7333
SWITZERLAND – Farnell InOne
Tel No: ++ 41 1 204 64 64
Fax No: ++ 41 1 204 64 54
AUSTRIA – Farnell InOne
Tel No: ++ 43 662 2180 680
Fax No: ++ 43 662 2180 670
FRANCE – Farnell InOne
Tel No: ++ 33 474 68 99 99
Fax No: ++ 33 474 68 99 90
NEW ZEALAND – Farnell InOne
Tel No: ++ 64 9 357 0646
Fax No: ++ 64 9 357 0656
UK – Farnell InOne
Tel No: ++ 44 8701 200 200
Fax No: ++ 44 8701 200 201
BELGIUM – Farnell InOne
Tel No: ++ 32 3 475 2810
Fax No: ++ 32 3 227 3648
GERMANY – Farnell InOne
Tel No: ++ 49 89 61 39 39 39
Fax No: ++ 49 89 613 59 01
NORWAY – Farnell InOne
Tel No: ++ 45 44 53 66 66
Fax No: ++ 45 44 53 66 02
UK – BuckHickman InOne
++ 44 8450 510 150
++ 44 8450 510 130
HONG KONG
–
PORTUGAL – Farnell InOne
Tel No: ++ 34 93 475 8804
Fax No: ++ 34 93 474 5288
UK – CPC
BRAZIL – Farnell-Newark InOne
Tel No: ++ 55 11 4066 9400
Fax No: ++ 55 11 4066 9410
Farnell-Newark InOne
++ 44 8701 202 530
++ 44 8701 202 531
Tel No: ++ 852 2268 9888
Fax No: ++ 852 2268 9899
SINGAPORE
–
IRELAND – Farnell InOne
Tel No: ++ 353 1 830 9277
Fax No: ++ 353 1 830 9016
EXPORT – Farnell InOne
Tel No: ++ 44 8701 200 208
Fax No: ++ 44 8701 200 209
CHINA – Farnell-Newark InOne
Tel No: ++86 10 6238 5152
Fax No: ++86 10 6238 5022
Farnell-Newark InOne
Tel No: ++ 65 6788 0200
Fax No: ++ 65 6788 0300
export
For enquiries from all other markets
DENMARK – Farnell InOne
Tel No: ++ 45 44 53 66 44
Fax No: ++ 45 44 53 66 06
ITALY – Farnell InOne
SPAIN – Farnell InOne
Tel No: ++ 39 02 93 995 200
Fax No: ++ 39 02 93 995 300
Tel No: ++ 34 93 475 8805
Fax No: ++ 34 93 474 5107
http://www.farnellinone.com
http://www.buckhickmaninone.com
http://www.cpc.co.uk
MALAYSIA –
ESTONIA – Farnell InOne
Tel No: ++ 358 9 560 7780
Fax No: ++ 358 9 345 5411
SWEDEN – Farnell InOne
Tel No: ++ 46 8 730 50 00
Fax No: ++ 46 8 83 52 62
Farnell-Newark InOne
Tel No: ++ 60 3 7873 8000
Fax No: ++ 60 3 7873 7000
Disclaimer This data sheet and its contents (the "Information") belong to the Premier Farnell Group (the "Group") or are licensed to it. No licence is granted for the use of it other than for information purposes
in connection with the products to which it relates. No licence of any intellectual property rights is granted. The Information is subject to change without notice and replaces all data sheets previously supplied.
The Information supplied is believed to be accurate but the Group assumes no responsibility for its accuracy or completeness, any error in or omission from it or for any use made of it. Users of this data
sheet should check for themselves the Information and the suitability of the products for their purpose and not make any assumptions based on information included or omitted. Liability for loss or damage
resulting from any reliance on the Information or use of it (including liability resulting from negligence or where the Group was aware of the possibility of such loss or damage arising) is excluded.
This will not operate to limit or restrict the Group's liability for death or personal injury resulting from its negligence. Multicomp is the registered trademark of the Group. © Premier Farnell plc 2004.
Page 5
10/05/05 V1.0
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