MF-AAA Datasheet, PDF (1/3 Pages) Bourns Electronic Solutions – PTC Resettable Fuses

Features
■ Fast tripping resettable circuit protection
■ Low internal resistance
■ Patents pending
■ Weldable nickel terminals
■ Agency recognition:
Applications
■ AAA size battery cells
MF-AAA Series - PTC Resettable Fuses
Electrical Characteristics
Model
V max.
Volts
MF-AAA170 15
MF-AAA210 15
I max.
Amps
50
50
Ih
Rated
Current
Amps
at 23°C
Hold
1.7
2.1
Typical
Current Trip Limit
Amps
at 0°C
Hold Trip
2.0 4.2
2.3 5.4
Amps
at 23°C
Hold Trip
1.7 3.7
2.1 4.5
Amps
at 60°C
Hold Trip
1.3 2.5
1.5 3.4
Initial
Resistance
Values
One Hour
Post-Trip
Resistance
Standard Trip
Ohms
at 23°C
Ohms
at 23°C
Min.
0.050
0.036
R1 Max.
0.072
0.048
Max.
0.120
0.086
Maximum Tripped
Time
Power
To Trip Dissipation
Seconds
at 23°C
Watts
at 23°C
Typ.
5 @ 8.5A
1.3
5 @ 10.5A 1.3
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 ......................................±5% typical resistance change
Humidity Aging....................................................+85°C, 85% R.H. 7 days ............................±5% typical resistance change
Thermal Shock ....................................................+85°C to -40°C, 20 times ............................±10% typical resistance change
Solvent Resistance ............................................MIL-STD-202, Method 215 ........................No change
Vibration ..............................................................MIL-STD-883C, Method A ..........................No change
Condition A
Test Procedures And Requirements For Model MF-AAA 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 ........................................................Vmax, 23°C ................................................T ≤ max. 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 ................................................R2057213
Thermal Derating Chart - Ihold (Amps)
Model
-40˚C
-20˚C
0˚C
MF-AAA170
MF-AAA210
2.45
2.21
2.00
2.03
2.20
2.30
*Itrip is approximately two times Ihold.
NOTE: Model MF-AAA is agency approved for 10V.
Ambient Operating Temperature
23˚C
40˚C
50˚C
1.70
1.56
1.44
2.10
1.90
1.71
60˚C
1.30
1.50
70˚C
1.19
1.37
85˚C
1.08
1.29
MF-AAA, REV. F, 11/02
Specifications are subject to change without notice.