Rev Date: 8/27/2021

2

www.seielect.com

This specification may be changed at any time without prior notice.

marketing@seielect.com

Please confirm technical specifications before you order and/or use.

RMEF Series

General Purpose Thick Film Chip Resistor

100% RoHS Compliant Without Exemption

Stackpole Electronics, Inc.

Resistive Product Solutions

Mechanical Specifications

Performance Characteristics

Test

Test Method

Procedure

Requirements

JIS-C-5201-1 4.8

IEC-60115-1 4.8

JIS-C-5201-1 4.13

2.5 times RCWV or Max. overload voltage

whichever is less for 5 seconds.

1%: ± (1 + 0.05 Ω)

5%: ± (2% + 0.1 Ω)

Leaching

JIS-C-5201-1 4.18

IEC-60068-2-58 8.2.1

260 ± 5ºC for 30 seconds

Individual leaching area ≤ 5%

Total leaching area ≤ 10%

Resistance to Soldering

Heat

JIS-C-5201-1 4.18

IEC-60115-1 4.18

260 ± 5ºC for seconds

1%: ± (0.5% + 0.05 Ω)

5%: ± (1% + 0.05 Ω)

Rapid Change of

Temperature

JIS-C-5201-1 4.19

IEC-60115-1 4.19

-55ºC to +155ºC, 5 cycles

1%: ± (0.5% + 0.05 Ω)

5%: ± (1% + 0.05 Ω)

Resistance to Solvent

JIS-C-5201-1 4.29

The tested resistor is immersed into isopropyl

alcohol of 20~25ºC for 60 seconds.

Then the resistor is left in the room for 48 hours.

1%: ± (0.5% + 0.05 Ω)

5%: ± (0.5% + 0.05 Ω)

Jumper: Max. 0.05 Ω after test

Damp Heat with Load

JIS-C-5201-1 4.24

IEC-60115-1 4.24

40 ± 2ºC, 90~95% R.H. RCWV or Max working

voltage whichever is less for 1000 hours with 1.5

hours "ON" and 0.5 hour "OFF".

1%: ± (1% + 0.05 Ω)

5%: ± (2% + 0.05 Ω)

Jumper: Max. 0.1 Ω after test

Load Life (Endurance)

JIS-C-5201-1 4.25

IEC-60115-1 4.25.1

70 ± 2ºC, RCWV or Max working voltage

whichever is less for 1000 hours with 1.5 hours

"ON" and 0.5 hour "OFF"

1%: ± (1% + 0.05 Ω)

5%: ± (3% + 0.1 Ω)

Jumper: Max. 0.1 Ω after test

Insulation Resistance

JIS-C-5201-1 4.6

IEC-60115-1 4.6

Apply 100VDC for 1 minute.

≥ 10G Ω

Bending Strength

JIS-C-5201-1 4.33

IEC-60115-1 4.33

Bending once for 5 seconds

D: 0402, 0603, 0805 = 5 mm

1206, 1210, 1812 = 3 mm

2010, 2512 = 2 mm

1%: ± (1% + 0.05 Ω)

5%: ± (1% + 0.05 Ω)

Temperature Coefficient of

Resistance (TCR)

Short Time Overload

Jumper: Overload current for 5 seconds

0402/0603/0805 = 2.5A

1206/1210/1812/2010/2512 = 5A

At 25/-55ºC and 25ºC/+155ºC, 25ºC is the

reference temperature

As per specification

IEC-60115-1 4.13

Jumper: Max 0.05 Ω after test

0.039 ± 0.0039

0.020 ± 0.0020

0.012 ± 0.0020

0.006 ± 0.004

0.008 ± 0.004

inches

1.00 ± 0.10

0.50 ± 0.05

0.30 ± 0.05

0.15 ± 0.10

0.20 ± 0.10

mm

0.063 ± 0.008

0.031 ± 0.006

0.016 ± 0.004

0.012 ± 0.008

0.012 ± 0.004

inches

1.60 ± 0.20

0.80 ± 0.15

0.40 ± 0.10

0.30 ± 0.20

0.30 ± 0.10

mm

0.079 ± 0.008

0.049 ± 0.006

0.020 ± 0.006

0.012 ± 0.006

0.016 ± 0.006

inches

2.00 ± 0.20

1.25 ± 0.15

0.50 ± 0.15

0.30 ± 0.15

0.40 ± 0.15

mm

0.120 ± 0.004

0.063 ± 0.008

0.022 ± 0.006

0.016 ± 0.008

0.020 ± 0.008

inches

3.05 ± 0.10

1.60 ± 0.20

0.55 ± 0.15

0.40 ± 0.20

0.50 ± 0.20

mm

0.120 ± 0.004

0.098 ± 0.008

0.022 ± 0.006

0.020 ± 0.008

0.020 ± 0.008

inches

3.05 ± 0.10

2.50 ± 0.20

0.55 ± 0.15

0.50 ± 0.20

0.50 ± 0.20

mm

0.177 ± 0.004

0.122 ± 0.008

0.022 ± 0.002

0.022 ± 0.008

0.028 ± 0.008

inches

4.50 ± 0.10

3.10 ± 0.20

0.55 ± 0.05

0.55 ± 0.20

0.70 ± 0.20

mm

0.197 ± 0.008

0.098 ± 0.008

0.022 ± 0.004

0.024 ± 0.008

0.024 ± 0.008

inches

5.00 ± 0.20

2.50 ± 0.20

0.55 ± 0.10

0.60 ± 0.20

0.60 ± 0.20

mm

0.248 ± 0.008

0.126 ± 0.008

0.022 ± 0.004

0.024 ± 0.008

0.024 ± 0.008

inches

6.30 ± 0.20

3.20 ± 0.20

0.55 ± 0.10

0.60 ± 0.20

0.60 ± 0.20

mm

Unit

Type / Code

RMEF0402

RMEF2010

L

W

H

I1

I2

RMEF0603

RMEF2512

RMEF0805

RMEF1206

RMEF1812

RMEF1210