FUSES / SICHERUNGEN PFRX
Resettable fuses
www.schurter.com
26
Wire leaded
PTC-Fuses
Type PFRX
Cured, flame r etar dant epoxy
Polymer insulating material
meets UL 94V-0
requirements
Bulk packaging, tape and
reel and Ammo-Pak
available on most models
Agency recognition:
UL, CSA, TÜV
0.01
0.001
110100
0.1
1
10
100
1000
PFRX.110
PFRX.135
PFRX.160
PFRX.185
PFRX.250
PFRX.300
PFRX.375
Typical Time to Trip at 23 ˚C
Time to trip (s)
Fault current (A)
Test Procedures And Requirements For Model PFRX Series
Test / Test Test Conditions / Bedingungen Accept/Reject Criteria
Visual/Mech. / visuell/mech. Verify dimensions and materials / Kontrolle Abmess./Mat. Per PF physical description
Resistance / Widerstand In still air @ 23 °C / bei ruhiger Luft Rmin
≤ R ≤ Rmax
Time to Trip / Trip-Zeit At spezified current Vmax, 23 °C / unter spez. Strom T ≤ max. time to trip (sec.)
Hold Current / Haltestrom 30 min. at Ihold
/ bei Haltestrom No trip
Trip Cycle Life / Trip-Zyklen Vmax, Imax, 100 cycles / Zyklen No arcing or burning
Trip Endurance / Zeit im Tripzustand Vmax, 48 hours / Stunden No arcing or burning
Environmental Characteristics
Operating/Storage Temperature / Einsatz/Lagertemp. –40 °C to +85 °C
Maximum Device Surface Temperature in Tripped State / 125 °C
Passive Aging / passive Alterung +85 °C, 1000 hours / Std. ±5% typ. resist. change
Humidity Aging / Feuchtigkeitsalterung +85 °C, 85% R.H. 1000 hours / Std.±5% typ. resist. change
Thermal Shock *)/ Thermischer Schock +85 °C/–40 °C 10 times / Zyklen ±10% typ. resist. change
Mechanical Shock / Mechanischer Schock MIL-STD-202, Method 213, No resistance change
Condition 1
(100 g, 6 sec. )
Solvent Resistance / Lösungsmittel-Beständigkeit MIL-STD-202, Method 215 No change
Vibration MIL-STD-883C, Method 2007.1, No change
Condition A
*) MIL-STD-202, Method 213
AE
B
D
C
Lead Material
0.81 dia. (20AWG)
Package 1
Kinked lead options available for board standoff
Applications
Almost anywhere there is a low
voltage power supply, up to 60 V
and a load to be protected, in-
cluding:
•Security- and Fire alarm
systems
•Loud speakers
•Power transformers
Typical Part Marking
Layout may vary
RX110
6180T
Manufacturer’s
Trademark Part identification
Lot No (T=Taiwan)
Date Code (Last
Digit of Year and
Julian Date)
50 75 100
FUSES / SICHERUNGEN PFRX
Resettable fuses
www.schurter.com
27
Type / Typ Vmax Imax Ihold Itrip Initial 1 Hour (R1) Post- Max. Time Tripped Power
Resistance / Trip Resistance / to trip at 23 °C / Dissipation /
Amperes / Ohms at 23 °C Ohms at 23 °C Seconds at 23 °C / Watts at 23 °C
Ampere at 23 °C
VAHold Trip min. max. R1 max.
PFRX.110.X 60 40 1.10 2.20 0.15 0.25 0.38 8.2 1.50
PFRX.135.X 60 40 1.35 2.70 0.12 0.19 0.30 9.6 1.70
PFRX.160.X 60 40 1.60 3.20 0.09 0.14 0.22 11.4 1.90
PFRX.185.X 60 40 1.85 3.70 0.08 0.12 0.19 12.6 2.10
PFRX.250 60 40 2.50 5.00 0.05 0.08 0.13 15.6 2.50
PFRX.300 60 40 3.00 6.00 0.04 0.06 0.10 19.8 2.80
PFRX.375 60 40 3.75 7.50 0.03 0.05 0.08 24.0 3.20
Electrical Characteristics
Dimensions
Type / Typ A B C D E Style / Lead / Material
max. max. nom. Tol. ± min. max.
PFRX.110.X 13.0 18.0 5.1 0.7 7.6 3.1 1 0.81 dia. / Ø Sn/Cu
PFRX.135.X 14.5 19.6 5.1 0.7 7.6 3.1 1 0.81 dia. / Ø Sn/Cu
PFRX.160.X 16.3 21.3 5.1 0.7 7.6 3.1 1 0.81 dia. / Ø Sn/Cu
PFRX.185.X 17.8 22.9 5.1 0.7 7.6 3.1 1 0.81 dia. / Ø Sn/Cu
PFRX.250 21.3 26.4 10.2 0.7 7.6 3.1 1 0.81 dia. / Ø Sn/Cu
PFRX.300 24.9 30.0 10.2 0.7 7.6 3.1 1 0.81 dia. / Ø Sn/Cu
PFRX.375 28.4 33.5 10.2 0.7 7.6 3.1 1 0.81 dia. / Ø Sn/Cu
Dimension = mm
Thermal Derating Chart - Ihold
(Amps)
Type / Typ Ambient Operating Temperature
40˚C –20 ˚C 0 ˚C 23 ˚C 40 ˚C 50 ˚C 60 ˚C 70 ˚C 85 ˚C
PFRX.110.X 1.71 1.50 1.31 1.10 0.89 0.79 0.69 0.59 0.44
PFRX.135.X 2.09 1.84 1.61 1.35 1.09 0.97 0.85 0.73 0.54
PFRX.160.X 2.48 2.18 1.90 1.60 1.30 1.15 1.01 0.86 0.64
PFRX.185.X 2.87 2.52 2.20 1.85 1.50 1.33 1.17 1.00 0.74
PFRX.250 3.88 3.40 2.98 2.50 2.03 1.80 1.58 1.35 1.00
PFRX.300 4.65 4.08 3.57 3.00 2.43 2.16 1.89 1.62 1.20
PFRX.375 5.81 5.10 4.46 3.75 3.04 2.70 2.36 2.03 1.50
How To Order
PF RX . XXX . X
PTC-Fuse
Style
RX = Radial Leaded Component
Hold Current, Ihold
110-375 (1.10 mA - 3.75 A)
Packaging Options
- = Bulk Packaging
.2 = Tape and Reel*
.3 = Ammo Pack*
*Packaged per EI486-B
Packaging
Bulk / Lose All types = 500 pcs. per bag
(leave .X space empty
Tape and reel / Gegurtet PFRX.110 – PFRX.160 = 1500 pcs. per reel ;
.X = 2 PFRX.185 = 1000 pcs. per reel
Ammo Pack: / Ammo-Verp. PFRX.110 – PFRX.160 = 1000 pcs. per reel ;
.X = 3 PFRX.185 = 500 pcs. per reel
