Note: RCWV(Rated Continuous Working Voltage) = Power Rating x Resistance Value or Max. working voltage listed above, whichever less.

Revision: 201304

Note:

5

eleCTriCAl ChArACTerisTiCs

sTYle

MFr-12

MFr25s MFr-25

MFr50s MFr-50

MFr1Ws MFr100

MFr2Ws MFr200 MFr3Ws

Power Rating at 70°C

1/6W

1/4W

1/2W

1W

2W

3W

Maximum Working Voltage

200V

250V

300V

350V

400V

500V

Maximum Overload Voltage

400V

500V

600V

700V

800V

1,000V

Voltage Proof on Insulation

300V

400V

500V

700V

1,000V

Resistance Range

1Ω - 10MΩ & 0Ω for E24 & E96 series value

Operating Temp. Range

-55°C to +155°C

Temperature Coefficient

±15ppm/°C, ±25ppm/°C, ±50ppm/°C, ±100ppm/°C

Note: Special value is available on request

eNViroNMeNTAl ChArACTerisTiCs

PerForMANCe TesT

TesT MeThoD

APPrAise

Short Time Overload

IEC 60115-1 4.13

2.5 times RCWV for 5 Sec.

±0.25%+0.05Ω

Voltage Proof on Insulation

IEC 60115-1 4.7

in V-block for 60 Sec., test voltage by type

By type

Temperature Coefficient

IEC 60115-1 4.8

-55°C to +155°C

By type

Insulation Resistance

IEC 60115-1 4.6

in V-block for 60 Sec.

>10,000MΩ

Solderability

IEC 60115-1 4.17

235±5°C for 3±0.5 Sec.

95% Min. coverage

Solvent Resistance of Marking

IEC 60115-1 4.30

IPA for 5±0.5 Min. with ultrasonic

No deterioration of

coatings and markings

Robustness of Terminations

IEC 60115-1 4.16

Direct load for 10 Sec. in the direction of the terminal leads

≥2.5kg (24.5N)

Periodic-pulse Overload

IEC 60115-1 4.39

4 times RCWV 10,000 cycles (1 Sec. on, 25 Sec. off)

±1.0%+0.05Ω

Damp Heat Steady State

IEC 60115-1 4.24

40±2°C, 90-95% RH for 56 days, loaded with 0.1 times RCWV

±1.5%+0.05Ω

Endurance at 70°C

IEC 60115-1 4.25

70±2°C at RCWV for 1,000 Hr. (1.5 Hr. on, 0.5 Hr. off)

±1.5%+0.05Ω

Temperature Cycling

IEC 60115-1 4.19

-55°C

 RoomTemp.  +155°C  RoomTemp. (5 cycles)

±0.75%+0.05Ω

Resistance to Soldering Heat

IEC 60115-1 4.18

260±3°C for 10±1 Sec., immersed to a point 3±0.5mm from the body

±0.25%+0.05Ω