Features
n Tip & ring line protection with two devices
in one surface mount package
n High voltage surge capabilities
n Assists in meeting ITU-T K.20/K.21/K.45
specifications as well as Telcordia GR-1089
intra-building
n RoHS compliant*
n Agency recognition:
Applications
Used as a secondary overcurrent protection
device in:
n Customer Premise Equipment (CPE)
n Central Office (CO)
n Subscriber Line Interface Cards (SLIC)
MF-SD/250 Series - Telecom PTC Resettable Fuses
*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.
Environmental Characteristics
Operating Temperature .................................... -45 °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 ................................................ MIL-STD-202F, Method 107G, ...............................±15 % 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
Flammability .................................................... IEC 695-2-2 ...........................................................No Flame for 60 secs.
Vibration .......................................................... MIL-STD-883C, Method 2007.1, Condition A ........No change
Test Procedures And Requirements For Model MF-SD/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 ...................................................... At specied current, Vmax, 23 °C .....................T ≤ max. time to trip (seconds)
Hold Current .................................................... 30 min. at Ihold .................................................No trip
Primary
Test Test Conditions Protection
Mains Power Contact - ITU-T K.20, K.21 ........ 230 V rms, 10 ohms, t = 15 min. .......................None
Power Induction - ITU-T K.20, K.21 ................. 600V rms, 600 ohms, t = 0.2 seconds ..............None
Power Induction - ITU-T K.20, K.21 ................. 600 V rms, 600 ohms, t = 1 second. .................GDT
Lightning Surge - ITU-T K.20, K.21 ................. 1.5 KV, 10/700 μs .............................................None
Lightning Surge ............................................... 4.0 KV, 10/700 μs .............................................GDT
UL File Number ........................................... E 174545S
Electrical Characteristics
Model
Max.
Operating
Voltage
Volts
Max.
Interrupt
Ratings
Ihold Itrip
Initial
Resistance
1 Hour (R
1
)
Post-Trip
Resistance*
Nominal Time
to Trip
Tripped
Power
Dissipation
Volts
(V)
Amps
(A)
Amperes
at 23 °C
Ohms
at 23 °C
Ohms
at 23 °C
Amps
at 23 °C
Seconds
at 23 °C
Watts
at 23 °C
Hold Trip Min. Max. Max. Typ.
MF-SD013/250 60 250 3.0 0.13 0.26 2.0 7.0 10.0 1 2.5 1.5
* R
1
value is measured 24 hours post reow.
Resistance matched in housing: 1.0 ohm measured 24 hours after reow installation.
Model
Ambient Operating Temperature
-40 °C -20 °C 0 °C 23 °C 40 °C 50 °C 60 °C 70 °C 85 °C
MF-SD013/250 0.21 0.18 0.16 0.13 0.10 0.09 0.08 0.07 0.05
Thermal Derating Chart -I
hold
(Amps)
*RoHS COMPLIANT
LEAD FREE
*RoHS COMPLIANT
VERSIONS
AVAILABLE
LEAD FREE
VERSIONS ARE
RoHS COMPLIANT*
