RoHS

SURFACE MOUNT RESISTORS

LRMA Series: Metal Alloy, Very Low Resistance

Page 6 of 9

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TEST PROCEDURES : except Jumper

2022.03.23

Test Item

Test Method

Procedure

Requirement

Temperature Coefficient

of Resistance (T.C.R)

JIS-C-5201-1 4.8

IEC-60115-1 4.8

At 25°C / +150°C, 25°C is the reference

temperature

As Spec.

Short Time Overload

JIS-C-5201-1 4.13

IEC-60115-1 4.13

The number of rated power as follows:

(for 5 seconds)

• 0805 - 0.5W : 5 times

• 0805 - 1W : 4 times

• 1206 - 0.5W to 1.5W : 5 times

• 2512 - 1W to 3W : 5 times

• 2725 - 4W : 4 times

• 2728 - 4W : 4 times

• 4527 - 2W & 3W : 5 times

• 4527 - 5W : 3 times

• Size 0805 : ∆R/R1 ≤ ±1.0%

• Size 4527 : ∆R/R1 ≤ ±2.0%

• The others : ∆R/R1 ≤ ±0.5%

MIL-STD-202

Method 108

Size 0805 : 1000 hours @ 170°C,

Unpowered, measured at 24±4 hours

after test conclusion

• Size 0805 : ∆R/R1 ≤ ±1.0%

JIS-C-5201-1 4.25

IEC-60068-2-2

Other sizes : 1000 hours @ 170°C

• Size 4527 : ∆R/R1 ≤ ±2.0%

• The others : ∆R/R1 ≤ ±1.0%

Resistance to

Soldering Heat

JIS-C-5201-1 4.18

IEC-60115-1 4.18

260 ± 5°C for 10 seconds

∆R/R1 ≤ ±0.5%

Temperature

Cycling

JESD22 Method

JA-104

1000 Cycles (-55°C to 155°C),

Measured at 24±4 hours after test conclusion.

30 minutes maximum dwell time at each

temperature extreme

∆R/R1 ≤ ±0.5%

Biased Humidity

MIL-STD-202

Method 103

1000 hours, 85°C / 85% RH, 10% of operating

power. Measurement at 24±4 hours after test

conclusion

∆R/R1 ≤ ±0.5%

Load Life

(Endurance)

JIS-C-5201-1 4.25

IEC-60115-1 4.25.1

70±2°C, RCWV or Max. working voltage

whichever is less for 1000 hours with 1.5hrs

"ON" and 0.5hr "OFF"

• Size 0805 : ∆R/R1 ≤ ±1.0%

• Size 4527 : ∆R/R1 ≤ ±2.0%

• The others : ∆R/R1 ≤ ±1.0%

J-STD-002

Size 0805 :

1) 4 hours 155°C dry heat

2) 245 ± 5°C

3 seconds

JIS-C-5201-1 4.17

IEC-60115-1 4.17

245 ± 5°C

3 seconds

Dielectric Withstanding

Voltage

JIS-C-5201-1 4.7

Applied 500VAC for 1 minute, and limit surge

current 50mA (max.)

No short or burned on the

appearance

Board Flex

(Bending Strength)

AEC Q200-005

JIS-C-5201-1 4.33

IEC-60115-1 4.33

Size 0805 : bend once 2mm for 60 seconds

Other size : bend once 2mm for 10 seconds

∆R/R1 ≤ ±0.5%

no broken

Terminal Strength

(SMD)

AEC Q200-006

Pressurizing force 17.7N for 60 seconds

∆R/R1 ≤ ±0.5%

no broken

Moisture Resistance

MIL-STD-202

Method 106

24 hours / Cycle, 10 cycles.

Steps 7a & 7b not required.

Unpowered. (Figure 1)

• Size 0805 : ∆R/R1 ≤ ±1.0%

• The others : ∆R/R1 ≤ ±0.5%

High Temperature

Exposure (Storage)

Solderability

> 95% Coverage