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

Technical Specifications

Type Dimensions (mm)
W ± 1 D ± 1 H ± 1 RM +2/-1 h Φ d1
RXF/RYF-5 13 9 25 5 4.5 0.8±0.1
RXF/RYF-7 13 9 38 5 4.5 0.8±0.1
RXF/RYF-10 16 12 35 7.5 4.5 0.8±0.1

Characteristics

Temperature Fuse Resistor Rated Power At 70°C(W) Resistance Range Tolerance
Mark Fusing Temperature(°C) Standard Current(A) Standard Voltage(V) 5 7 10 Wirewound RXF Metal Oxide RYF Wirewound RXF Metal Oxide RYF
A 109 +1/-3 10 250 1.2 1.4 2.0
B 129±4 10 250 1.6 2.0 2.5
C 152±4 10 250 1.6 2.0 2.5 J
D 188 +2/-1 10 250 2.0 2.4 3.5 (±5%) J
E 226 +1/-3 10 250 2.0 2.4 3.5 1~100Ω 110Ω~10KΩ (±5%)
F 95 +3/0 2 250 0.8 1.2 K
G 110±4 2 250 1.2 1.4 (±10%)
H 126±4 2 250 1.4 1.6
N 130±4 2 250 1.6 2.0
M 145±4 2 250 2.1 2.4

Please consult factory for special fusing conditions not shown


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: 129°C Blow Time 10 ohms 5% 10AMP Blow Time
RXF5 B
BLOW TEMP °C
 		1ORO
RESISTANCE 		J
TOLERANCE 		10
BLOW AMPS
TYPE |
A B C D E
109 129 152 188 226
F G H N M
95 110 126 130 145
4 DIGITS
USE R FOR DECIMAL 		J = 5%
K = 10% 		2 = 2amps
10 = 10amps


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