MR25W472-PQL [WALSIN]

High power rating and compact size;


型号：	MR25W472-PQL
厂家：	Walsin Technology
描述：	High power rating and compact size
文件：	总7页 (文件大小：418K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Approval sheet

MR18X, MR20X, MR25X

1%, 5%

Power chip resistors

Size 1218, 2010, 2512

( Automotive & Anti-sulfuration )

*Contents in this sheet are subject to change without prior notice.

Page 1 of 7

ASC_MR18-20-25X_V04

DEC 2016

Approval sheet

FEATURE

1. High power rating and compact size

2. High reliability and stability

3. Automotive AEC Q-200 compliant

4. 100% CCD visual inspection

5. RoHS compliant and Lead free product

APPLICATION



Power supply

Industry

Motor control

M/B Computer

Automotives

Servo

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

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

nominated value within tolerance which controlled by laser trimming 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

Fig 2. Construction of 1218 Chip-R

Page 2 of 7

ASC_MR18-20-25X_V04

DEC 2016

Approval sheet

QUICK REFERENCE DATA

Item

Series No.

General Specification

MR20

MR18

MR25

Size code

1218(3248)

2010 ( 5025 ),

5% (E24); 1% (E24+E96)

1 ~ 10M, Jumper (0)

 200 ppm/C

 100 ppm/C

 200 ppm/C

0.75 W

2512(6432)

Resistance Tolerance

Resistance Range

TCR (ppm/C)

< 10

 200 ppm/C

 100 ppm/C

 200 ppm/C

 100 ppm/C

 200 ppm/C

10 ~ 1M

> 1M

Max. dissipation at T_amb=70C

Max. Operation Voltage (DC or RMS)

Max. Overload Voltage (DC or RMS)

Climatic category (IEC 60068)

200V

250V

400V

500V

55/155/56

Test conditions for jumper ( 0 ohm )

Type

MR18X

1 W

MR20X

3/4 W

MR25X

1 W

Power Rating At 70C

Resistance

Max. 50mR

4.5 A

Max. 50mR

3.2 A

Max. 50mR

4.5 A

Rated Current

Peak Current

11 A

8 A

11 A

Operating Temperature

-55C ~ 155℃

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

MR18

MR20

MR25

3.050.15

4.600.20

0.550.10

0.450.25

0.500.25

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

Page 3 of 7

ASC_MR18-20-25X_V04

DEC 2016

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, 1218

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.3

Fig 3

Maximum dissipation in percentage of rated power as a

function of the ambient temperature

MOUNTING

Due to their rectangular shapes and small tolerances, Surface Mountable Resistors are suitable for handling by

automatic placement systems. Chip placement can be on ceramic substrates and printed-circuit boards (PCBs).

Electrical connection to the circuit is by individual soldering condition. The end terminations guarantee a reliable

contact.

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 4.

Fig 4. Infrared soldering profile for Chip Resistors

Page 4 of 7

ASC_MR18-20-25X_V04

DEC 2016

Approval sheet

CATALOGUE NUMBERS

The resistors have a catalogue number starting with .

MR25

472_

Size code

Type code

X :

Resistance code

Tolerance

Packaging code

Termination

code

MR25 : 2512

MR20 : 2010

MR18 : 1218

: 7” Reeled taping

: 10” Reeled taping

: 13” Reeled taping

: Bulk

5%: E24: 2 significant digits F : 1%

followed by no. of zeros

= Sn base

5%: 1-10M

1%: 10-1M

W :

J : 5%

(lead free)

100 = 101_

P : Jumper

10K = 103

11%: E96: 3 significant

digits followed by no. of

zeros

1%: < 10; >1M

102

=1020

=3742

37.4K

* Anti-Sulfuration test conditions: H2S 3ppm, 40’C, RH 90%, 1000hrs, criteria: +/-1% !

* 100% CCD visual inspection to guarantee visual quality !

TEST AND REQUIREMENTS

Essentially all tests are carried out according to the schedule of IEC publication 115-8, category

LCT/UCT/56(rated temperature range : Lower Category Temperature, Upper Category Temperature; damp

heat, long term, 56 days). The testing also meets the requirements specified by EIA, EIAJ and JIS.

The tests are carried out in accordance with IEC publication 68, "Recommended basic climatic and mechanical

robustness testing procedure for electronic components" and under standard atmospheric conditions according

to IEC 60068-1, subclause 5.3. Unless otherwise specified, the following value supplied :

Temperature: 15°C to 35°C.

Relative humidity: 45% to 75%.

Air pressure: 86kPa to 106 kPa (860 mbar to 1060 mbar).

All soldering tests are performed with midly activated flux.

REQUIREMENT

TEST

PROCEDURE / TEST METHOD

Resistor

0

Electrical

- DC resistance values measurement

Within the specified tolerance

Characteristics

- Temperature Coefficient of Resistance (T.C.R)

Refer to “QUICK REFERENCE DATA”

Natural resistance change per change in degree centigrade.

JISC5201-1: 1998

R₂ R

₁t₂t₁

10⁶(ppm/C) t₁: 20°C+5°C-1°C

Clause 4.8

R₁: Resistance at reference temperature

R₂: Resistance at test temperature

Un-mounted chips completely immersed for 10±1second in a SAC

solder bath at 270℃±5ºC

R/R max. (0.5%+0.05)

Resistance to

soldering heat

(R.S.H)

No visible damage

MIL-STD-202

method 210

Page 5 of 7

ASC_MR18-20-25X_V04

DEC 2016

Approval sheet

TEST

REQUIREMENT

Resistor

PROCEDURE / TEST METHOD

0

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

235℃/ 5sec.

Solderability

95% coverage min., good tinning and no

visible damage

J-STD-002

b) Steam the sample dwell time 1 hour/ solder dipping

260℃/ 7sec.

1000 cycles, -55℃ ~ +155℃, dwell time 5~10min

652C, 80~100% RH, 10 cycles, 24 hours/ cycle

R/R max. (0.5%+0.05)

Temperature cycling

JESD22

No visible damage

<50m

Method JA-104

R/R max. (0.5%+0.05)

Moisture Resistance

MIL-STD-202

No visible damage

method 106

1000+48/-0 hours; 85C, 85% RH, 10% of operation power

1000+48/-0 hours; 35% of operation power, 1252C

R/R max. (1.0%+0.05)

Bias Humidity

MIL-STD-202

method 103

<50m

No visible damage

Operational Life

R/R max. (1%+0.05)

MIL-STD-202

method 108

No visible damage

High Temperature

Exposure

1000+48/-0 hours; without load in a temperature chamber

R/R max. (1.0%+0.05)

controlled 1553C

No visible damage

<50m

MIL-STD-202

Method 108

Mechanical Shock

MIL-STD-202

method 213

Board Flex

1/2 Sine Pulse / 1500g Peak / Velocity 15.4ft/sec

Within the specified tolerance

No visible damage

<50m

Resistors mounted on a 90mm glass epoxy resin PCB(FR4),

bending once 2mm for 10sec

R/R max. (1.0%+0.05).

AEC-Q200-005

Terminal strength

AEC-Q200-006

Vibration

No visible damage

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

No remarkable damage or removal of

the terminations

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

R/R max. (1.0%+0.05)

MIL-STD-202

method 204

Thermal shock

MIL-STD-202

method 107

ESD

No visible damage

<50m

Test –55 to 155℃/ dwell time 15min/ Max transfer time 20sec

R/R max. (0.5%+0.05)

300cycles

No visible damage

<50m

Test contact 3.0KV

R/R max. (1.0%+0.05).

AEC-Q200-002

No visible damage

Page 6 of 7

ASC_MR18-20-25X_V04

DEC 2016

Approval sheet

PACKAGING

Plastic Tape specifications (unit :mm)

Type

MR18

MR20

MR25

4.90±0.20

5.50±0.20

6.90±0.20

3.55±0.30

2.80±0.20

3.60±0.20

12.00±0.30

5.50±0.10

1.75±0.10

Type

MR18

MR20

MR25

D

8.00±0.10

1.30±0.20

0.1

0.0

4.00±0.10

1.50

4.00±0.10

MAX1.2

Reel dimensions

Symbol

(unit : mm)

13.0±0.2

14.0±0.2

178.0±2.0

60.0±1.0

Taping quantity

MR20, MR25 by plastic tape taping 4,000 pcs per reel.

MR18 by plastic tape taping 3,000 pcs per reel

Page 7 of 7

ASC_MR18-20-25X_V04

DEC 2016

相关型号：