SR20X [WALSIN]

Sulfuration resistant ASTM B-809-95 compliant;


型号：	SR20X
厂家：	Walsin Technology
描述：	Sulfuration resistant ASTM B-809-95 compliant
文件：	总8页 (文件大小：485K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Approval sheet

SR20X, SR25X

±1%, ±5%

Power chip resistors

Size 2010, 2512

( Automotive & Anti-sulfuration )

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SR20-25X_V04

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Approval sheet

FEATURE

1. High reliability and stability ±1%

2. Sulfuration resistant ASTM B-809-95 compliant

3. Automotive grade AEC Q-200 Compliant

4. Higher component and equipment reliability

5. RoHS compliant Lead free products

APPLICATION

•

Power supply

Industry

Motor control

M/B Computer

Automotives

•

Server

DESCRIPTION

The resistors are constructed in a high grade ceramic body (aluminum oxide). Internal metal electrodes are

added at each end and connected by a resistive paste that is applied to the top surface of the substrate. The

extra protective metal film is added onto top side electrodes to protect termination from sulfuration. The

composition of the paste is adjusted to give the approximate resistance required and the value is trimmed to

within tolerance by laser cutting of this resistive layer.

The resistive layer is covered with a protective coat. Finally, the two external end terminations are added. For

ease of soldering the outer layer of these end terminations is a Tin (lead free) alloy.

Fig 1. Construction of 2512, 2010 Chip-R

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Approval sheet

QUICK REFERENCE DATA

Item

Series No.

General Specification

SR20

2010 ( 5025 ),

SR25

Size code

2512(6432)

Resistance Tolerance

Resistance Range

±5% (E24); ±1% (E24+E96)

1Ω ~ 10MΩ, Jumper (0Ω)

± 200 ppm/°C

TCR (ppm/°C)

< 10Ω

10Ω ~ 1MΩ

> 1MΩ

± 100 ppm/°C

± 200 ppm/°C

0.5 W

Max. dissipation at T_amb=70°C

Max. Operation Voltage (DC or RMS)

Max. Overload Voltage (DC or RMS)

Operation temperature

200V

400V

250V

500V

-55 ~ +155’C

Test conditions for jumper ( 0 ohm )

Type

SR20X

1/2 W

SR25X

Power Rating At 70C

Resistance

1 W

Max. 50mR

4.5 A

Max. 50mR

3.2 A

Rated Current

Peak Current

8 A

11 A

Operating Temperature

-55C ~ 155C

Note :

This is the maximum voltage that may be continuously supplied to the resistor element, see “IEC publication

60115-8”

Max. Operation Voltage : So called RCWV (Rated Continuous Working Voltage) is determined by

RCWV = RatedPower ×Resistance Value or Max. RCWV listed above, whichever is lower.

MECHANICAL DATA (unit : mm)

TYPE

SR20

SR25

5.00±0.20

2.50±0.20

0.55±0.10

0.65±0.25

0.60±0.25

6.40±0.20

3.20±0.20

0.60±0.10

0.65±0.25

0.90±0.25

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Approval sheet

MARKING

Each resistor is marked with a four-digit code on the protective coating to designate the nominal resistance

value

±5%,

±1% tolerance !

Size

±5%

±1%

2512, 2010

4-digits marking

FUNCTIONAL DESCRIPTION

Product characterization

Standard values of nominal resistance are taken from the E96 & E24 series for resistors with a tolerance of ±5%

& ±1%. The values of the E24/E96 series are in accordance with “IEC publication 60063”.

Derating curve

The power that the resistor can dissipate depends on the operating temperature; see Fig.2

SOLDERING CONDITION

The robust construction of chip resistors allows them to be completely immersed in a solder bath of 260°C for 10

seconds. Therefore, it is possible to mount Surface Mount Resistors on one side of a PCB and other discrete

components on the reverse (mixed PCBs).

Surface Mount Resistors are tested for solderability at 235°C during 2 seconds. The test condition for no

leaching is 260°C for 30 seconds. Typical examples of soldering processes that provide reliable joints without

any damage are given in Fig 3.

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Approval sheet

Fig 3. Infrared soldering profile for Chip Resistors

CATALOGUE NUMBERS

The resistors have a catalogue number starting with .

SR25

472_

Size code

Type code

X :

Resistance code

Tolerance

F : ±1%

Packaging code

Termination

code

SR25 : 2512

SR20 : 2010

E24: 2 significant digits

followed by no. of

zeros

: 7” Reeled taping

: 10” Reeled taping

: 13” Reeled taping

: Bulk

= Sn base

±5%: 1Ω - 10MΩ

±1%: 10Ω - 1MΩ

W :

J : ±5%

(lead free)

P : Jumper

100Ω = 101_

10KΩ = 103

±1%: <10Ω; > 1MΩ

E96 : 3 significant digits

followed by no. of

zeros

102Ω

=1020

=3742

37.4KΩ

* Anti-Sulfuration test conditions: ASTM B-809-95 60’C, 480hrs! Acceptance criteria +/-1%!

* 100% CCD visual inspection to guarantee visual quality.

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Approval sheet

TEST AND REQUIREMENTS ( AEC Q-200 )

REQUIREMENT

Resistor

TEST

PROCEDURE / TEST METHOD

0Ω

Within the specified tolerance N/A

Refer to “QUICK REFERENCE

DATA”

Electrical

DC resistance values measurement

Characteristics

Temperature Coefficient of Resistance (T.C.R)

Natural resistance change per change in degree

centigrade.

JISC5201-1: 1998

R₂− R

Clause 4.8

×10⁶(ppm/°C) t₁: 20°C+5°C-1°C

(

t₂− t₁

)

R₁: Resistance at reference temperature

R₂: Resistance at test temperature

Un-mounted chips completely immersed for

Resistance to

∆R/R max. ±(0.5%+0.05Ω)

10±1second in a SAC solder bath at 270℃±5ºC

soldering heat(R.S.H)

<50mΩ

no visible damage

MIL-STD-202

method 210

a) Bake the sample for 155℃ dwell time 4hrs/ solder

dipping 235℃/ 5sec.

Solderability

J-STD-002

95% coverage min., good tinning and no

visible damage

b) Steam the sample dwell time 8 hour/ solder

dipping 215℃/ 5sec.

c) Steam the sample dwell time 8 hour/ solder

dipping 260℃/ 7sec.

∆R/R max. ±(0.5%+0.05Ω)

<50mΩ

1000 cycles, -55℃ ~ +155℃, dwell time 30min

Temperature cycling

JESD22

no visible damage

maximum.

Method JA-104

∆R/R max. ±(0.5%+0.05Ω)

No visible damage

Moisture Resistance

MIL-STD-202

65±2°C, 80~100% RH, 10 cycles, 24 hours/ cycle

method 106

1000+48/-0 hours; 85°C, 85% RH, 10% of operation ∆R/R max. ±(1.0%+0.05Ω)

Bias Humidity

MIL-STD-202

method 103

Operational Life

MIL-STD-202

method 108

High Temperature

Exposure

power

No visible damage

1000+48/-0 hours; 35% of

operation power,

∆R/R max. ±(1.0%+0.05Ω)

125±2°C

<50mΩ

No visible damage

1000+48/-0 hours; without load in a temperature ∆R/R max. ±(1%+0.05Ω)

chamber controlled 155±3°C No visible damage

MIL-STD-202

Method 108

Board Flex

Resistors mounted on a 90mm glass epoxy resin ∆R/R max. ±(1.0%+0.05Ω)

<50mΩ

AEC-Q200-005

Terminal strength

AEC-Q200-006

Thermal shock

MIL-STD-202

method 107

ESD

PCB(FR4),bending once 2mm for 60sec.

No visible damage

Pressurizing force: 1.8Kg, Test time: 60±1sec.

No remarkable damage or removal of the

terminations

Test –55 to 155℃/ dwell time 15min/ Max transfer ∆R/R max. ±(0.5%+0.05Ω)

<50mΩ

time 20sec 300cycles

No visible damage

Test contact 3KV.

∆R/R max. ±(1.0%+0.05Ω)

<50mΩ

AEC-Q200-002

No visible damage

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Approval sheet

Test ½ Sine Pulse, Peak value: 100g, normal

duration: 6ms, Velocity change:12.3ft/sec. Three

shocks in each direction, total 18 shocks.

Mechanical Shock

MIL-STD-202

method 213

Vibration

Within product specification

<50mΩ

tolerance and no visible damage.

Test 5g’s for 20 min., 12 cycles each of 3

orientations.

△R/R max. ±(1%+0.05Ω) and

MIL-STD-202

method 204

no visible damage.

Solvent is Isopropyl alcohol, immersion 3mins at 25 No superficial defect on marking, <50mΩ

℃ and brush 10 strokes with a toothbrush with a

Resistance to

Solvents : MIL-STD-

202

encapsulation, coating,

handle made of a non-reactive material (wet bristle), appearance. Electrical

immersion and brush 3 times and then air blow dry. characteristics within products

specification and tolerance.

Method 215

Inspect at 3X max. for marking,

inspect at 10X for part damage.

Electrical test not required. Inspect device

construction, marking and workmanship

External Visual

MIL-STD-883

method 2009

Physical Dimension

JESD22

No visual damage and refer WTC marking

code.

Verify physical dimensions(L, W, T, Tb, Tt)

Within the specified tolerance for WTC.

method JB-100

Page 7 of 8

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PACKAGING

Plastic Tape specifications (unit :mm)

Type

SR25

SR20

6.90±0.20

5.50±0.20

3.60±0.20

2.80±0.20

12.00±0.30

5.50±0.10

1.75±0.10

Type

SR25

SR20

ΦD

+0.1

4.00±0.10

MAX1.2

Φ1.50

−0.0

Reel dimensions

Symbol

(unit : mm)

13.0±0.2

14.0±0.2

Φ178.0±2.0

Φ60.0±1.0

Taping quantity

SR20, SR25 by plastic tape taping 4,000 pcs per reel.

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Jan - 2013

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