Specifications are subject to change without notice.

Customers should verify actual device performance in their specific applications.

Max.

One Hour

Max.

Interrupt

Hold

Initial

Post-Trip

Operating

Ratings

Current

Resistance

Resistance

Model

Voltage

Volts

Amps

Amps

Ohms

Ohms

Ohms

(Vrms)

(A)

at

at

at

at

(Vdc)

23 °C

23 °C

23 °C

23 °C

Max.

Max.

IH

Min.

Max.

Max.

MF-R008/250U

60

250

3.0

0.08

14.0

20.0

33.0

MF-R008/250

60

250

3.0

0.08

15.0

22.0

33.0

MF-R011/250U

60

250

3.0

0.11

5.0

9.0

16.0

MF-R012/250

60

250

3.0

0.12

4.0

8.0

16.0

MF-R012/250-A

60

250

3.0

0.12

7.0

9.0

16.0

MF-R012/250-C

60

250

3.0

0.12

5.5

7.5

14.0

MF-R012/250-F

60

250

3.0

0.12

6.0

10.5

16.0

MF-R012/250-1

60

250

3.0

0.12

6.0

9.0

16.0

MF-R012/250-2

60

250

3.0

0.12

8.0

10.5

16.0

MF-R012/250U

60

250

3.0

0.12

6.0

10.0

16.0

MF-R014/250

60

250

3.0

0.145

3.0

6.0

12.0

MF-R014/250-A

60

250

3.0

0.145

3.0

5.5

12.0

MF-R014/250-B

60

250

3.0

0.145

4.5

6.0

14.0

MF-R014/250U

60

250

3.0

0.145

3.5

6.5

12.0

MF-R018/250U

60

250

10.0

0.18

0.8

2.0

4.0

Electrical Characteristics

Features

ranges available

Applications

Operating/Storage Temperature ..............................-40 °C to +85 °C

Maximum Device Surface Temperature

in Tripped State......................................................125 °C

Passive Aging ..........................................................+85 °C, 1000 hours ........................................................±15 % typical resistance change

+60°C, 1000 hours

±15 % typical resistance change

Humidity Aging ........................................................+85 °C, 85 % R.H. 500 hours ..........................................±15 % typical resistance change

Thermal Shock ........................................................MIL-STD-202F, Method 107G, ........................................±10 % typical resistance change

+125 °C to -55 °C,10 times

±15 % typical resistance change

Solvent Resistance ..................................................MIL-STD-202, Method 215B............................................No change

Lead Solderability ....................................................ANSI/J-STD-002 ..............................................................>95 % coverage

Flammability ............................................................IEC 695-2-2 ......................................................................No Flame for 60 secs.

Vibration ..................................................................MIL-STD-883C, Method 2007.1, Condition A..................±5 % typical resistance change

Environmental Characteristics

Test

Test Conditions

Accept/Reject Criteria

Visual/Mech. ......................................................Verify dimensions and materials..................Per MF physical description

Resistance ..........................................................In still air @ 23 °C ........................................Rmin ≤ R ≤ R1max

Time to Trip ........................................................5 times Ihold, Vmax, 23 °C..........................T ≤ typical time to trip (seconds)

Hold Current ......................................................30 min. at Ihold............................................No trip

Trip Cycle Life ....................................................Vmax, Imax, 100 cycles ..............................No arcing or burning

Trip Endurance....................................................Vmax, 48 hours ..........................................No arcing or burning

UL File Number ..................................................E 174545S

CSA File Number ................................................CA 110338

TÜV File Number ................................................R02057213

Test Procedures And Requirements For Model MF-R/250 Series

“U” suffix indicates product without insulation coating.

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