Features

ranges available

Applications

MF-RX/250 Series - Telecom PTC Resettable Fuses

Environmental Characteristics

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

Humidity Aging...................................................... +85 °C, 85 % R.H. 1000 hours ............................. ±15 % typical resistance change

Thermal Shock ..................................................... +125 °C to -55 °C,10 times................................... ±15 % typical resistance change

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

Lead Solerability ................................................... 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

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

Test

Test Conditions

Accept/Reject Criteria

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

Resistance....................................................... In still air @ 23 °C.............................................Rmin

≤ R ≤ Rmax

Time to Trip...................................................... TTT current, Vmax, 23 °C.................................T

≤ max. time to trip (seconds)

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

Trip Cycle Life.................................................. 250 Vrms, 3A, 10 cycles ...................................No arcing or burning

UL File Number.......................................

......... E174545

TÜV File Number............................................. 50260658

Electrical Characteristics

Model

Max.

Operating

Voltage

(Vdc)

Max. Interrupt

Ratings

Hold Current

Initial Resistance

One Hour

Post-Trip

Resistance

Volts

(Vrms)

Amps

(A)

Amps

at 23 °C

Ohms

at 23 °C

Ohms

at 23 °C

Ohms

at 23 °C

Max.

Max.

IH

Min.

Max.

Max.

MF-RX012/250

60

250

3.0

0.12

4.0

8.0

16.0

MF-RX012/250-A

60

250

3.0

0.12

7.0

9.0

16.0

MF-RX012/250-C

60

250

3.0

0.12

5.5

7.5

14.0

MF-RX012/250-F

60

250

3.0

0.12

6.0

10.5

16.0

MF-RX012/250-1

60

250

3.0

0.12

6.0

9.0

16.0

MF-RX012/250-2

60

250

3.0

0.12

8.0

10.5

16.0

MF-RX012/250-T

60

250

3.0

0.12

7.0

12.0

16.0

MF-RX012/250U

60

250

3.0

0.12

6.0

10.0

16.0

MF-RX014/250

60

250

3.0

0.145

3.0

6.0

14.0

MF-RX014/250-A

60

250

3.0

0.145

3.0

5.5

12.0

MF-RX014/250-B

60

250

3.0

0.145

4.5

6.0

14.0

MF-RX014/250-T

60

250

3.0

0.145

5.4

7.5

14.0

MF-RX014/250U

60

250

3.0

0.145

3.5

6.5

12.0

MF-RX018/250

60

250

10.0

0.18

0.8

2.0

4.0

MF-RX018/250U

60

250

10.0

0.18

0.8

2.0

4.0

“U” suffix indicates product without insulation coating.

*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.

Specifications are subject to change without notice.

The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.

Users should verify actual device performance in their specific applications.