product guide
TYPE RXF - THERMAL FUSIBLE RESISTOR
Wirewound, Stand Up Fusible Resistor, Ceramic Case

Technical Specifications
Type Power rating
@ 25 °C		 Resistance Range Dimensions (mm)
Min. Max. W S H
RXF-2 1.0W 1R0 100R0 12.0 8.0 25.0
RXF-3 1.5W 1R0 100R0 13.0 9.0 26.0
RXF-5 2.1W 1R0 100R0 13.0 9.0 26.0

Characteristics
Test Condition Specifications
Tolerances ± 5% (J)
±10% (K)
Dielectric Strength 1000V, R < ± 0.5% R + 0.05
TCR < ± 400 x 10 -6 °C
Insulation Resistance 500V, > 20 M
Load life: 70% power rate @ 70 °C, 1000 hrs R < ± 0.2% R + 0.05
Terminal strength R < ± 0.5% R + 0.05
Fusing overload characteristic ref. fig. 3

Derating Curve Blowtime Curve at Elevated Wattages
To find the fusing time at an elevated wattage, multiply the resistor's rated wattage @ 25 °C by the power multiplier. (fig. 3)

Two Factors to consider when choosing a thermal fuse resistor:
1. Resistor temperature at blow time.
2. Resistor current at blow time.
See ordering information for choices.

Ordering Information:
Example: 1W 129°C Blow Time 10 ohms 5% 2AMP Blow Time
RXF2 B
BLOW TEMP °C
 1ORO
RESISTANCE 		J
TOLERANCE 		2
BLOW AMPS
TYPE |
A B C D E
109 129 152 188 226
4 DIGITS
USE R FOR DECIMAL		 J = 5%
K = 10%		 2 = 2amps
10 = 10amps


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