SETFUSE TRXF Thermal-Link & Fusing Resistor User Guide
Vertical Installation (Round)

Horizontal Installation (Ω Shape)

Description
Thermal-Link & Fusing Resistor (TRXF) is a unique type of power resistor, with over temp. and over current protections.
The Alloy Thermal-Link (ATCO) is placed through the core of Fusible Wirewound Resistor (RXF) and in series with RXF.
Features
- Patented Product
- Over Temp. Protection
- Surge Protection
- Inrush Current Protection
- Small Fault Current Protection
- Short Circuit Protection
- RoHS & REACH Compliant
Applications
- Switch Mode Power Supply (SMPS)
- Adapters
- LED Drivers
- Small Power Home Appliances
Dimensions (mm)

| L | L1a | D | d | Fa |
| 11.0 Max. | 3.5 ± 0.5 | Φ4.8 ± 0.2 | Φ0.54 ± 0.05 | 5.0 ± 0.5 |
Note:
a: F, L1 and the bending mode of pins can be customized as required.

| L | L1a | H | D | d | Fa |
| 11.0 Max. | 3.5 ± 0.5 | 6.0 ± 0.2 | Φ4.8 ± 0.2 | Φ0.54 ± 0.05 | 10.0 ± 0.5 |
Note:
a: F, L1 and the bending mode of pins can be customized as required.
Structure Diagram

Agency Approvals
| Agency | Standards | File No. | Resistance Range |
![]() | UL1412 | E324712 | 0.27 Ω ~ 800 Ω |
![]() | SJ 2865 | CQC15001126563 | 0.27 Ω ~ 800 Ω |
![]() | IEC 60065 | R50279979 | 0.47 Ω ~ 800 Ω |
Specifications
| Series | Power Type | Derating Factor (25 °C) | Rated Resistance | Resistance Tolerance | Rated Functioning Temp. (Tf) | Fusing Temp. | Agency Approvals | Environmental Status | |||
![]() | ![]() | ![]() | RoHS | REACH | |||||||
| (W) | (%) | (Ω) | (%) | (°C) | (°C) | cURus | TUV | CQC | |||
| TRXF1 | 1 | 50 | 0.27 ~ 0.47 | ± 5, ± 10 | 145 | 138 ~ 142 | l | N/A | l | l | l |
| 100 | 221 | 216 ~ 221 | |||||||||
| 50 | 0.47 ~ 800 | ± 5, ± 10 | 145 | 138 ~ 142 | l | l | l | l | l | ||
| 100 | 221 | 216 ~ 221 | |||||||||
Resistance Selection Table (According to IEC60063-2015, blue font is SETsafe | SETfuse common resistance).
| Rated Resistance | Code | Rated Resistance | Code | Rated Resistance | Code | Rated Resistance | Code |
| (Ω) | (Ω) | (Ω) | (Ω) | ||||
| 0.10 | R10 | 1.0 | 1R0 | 10 | 10R | 100 | 100R |
| 0.11 | R11 | 1.1 | 1R1 | 11 | 11R | 110 | 110R |
| 0.12 | R12 | 1.2 | 1R2 | 12 | 12R | 120 | 120R |
| 0.13 | R13 | 1.3 | 1R3 | 13 | 13R | 130 | 130R |
| 0.15 | R15 | 1.5 | 1R5 | 15 | 15R | 150 | 150R |
| 0.16 | R16 | 1.6 | 1R6 | 16 | 16R | 160 | 160R |
| 0.18 | R18 | 1.8 | 1R8 | 18 | 18R | 180 | 180R |
| 0.20 | R20 | 2.0 | 2R0 | 20 | 20R | 200 | 200R |
| 0.22 | R22 | 2.2 | 2R2 | 22 | 22R | 220 | 220R |
| 0.24 | R24 | 2.4 | 2R4 | 24 | 24R | 240 | 240R |
| 0.27 | R27 | 2.7 | 2R7 | 27 | 27R | 270 | 270R |
| 0.30 | R30 | 3.0 | 3R0 | 30 | 30R | 300 | 300R |
| 0.33 | R33 | 3.3 | 3R3 | 33 | 33R | 330 | 330R |
| 0.36 | R36 | 3.6 | 3R6 | 36 | 36R | 360 | 360R |
| 0.39 | R39 | 3.9 | 3R9 | 39 | 39R | 390 | 390R |
| 0.43 | R43 | 4.3 | 4R3 | 43 | 43R | 430 | 430R |
| 0.47 | R47 | 4.7 | 4R7 | 47 | 47R | 470 | 470R |
| 0.51 | R51 | 5.1 | 5R1 | 51 | 51R | 510 | 510R |
| 0.56 | R56 | 5.6 | 5R6 | 56 | 56R | 560 | 560R |
| 0.62 | R62 | 6.2 | 6R2 | 62 | 62R | 620 | 620R |
| 0.68 | R68 | 6.8 | 6R8 | 68 | 68R | 680 | 680R |
| 0.75 | R75 | 7.5 | 7R5 | 75 | 75R | 750 | 750R |
| 0.82 | R82 | 8.2 | 8R2 | 82 | 82R | N/A | N/A |
| 0.91 | R91 | 9.1 | 9R1 | 91 | 91R | N/A | N/A |
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