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UB5C-5RF1 Equivalent & Substitute Parts
Part Overview
The UB5C-5RF1 is a 5 Ohm ±1% 5W axial wirewound resistor manufactured by Riedon. This through-hole component is designed for current sensing applications with enhanced reliability features including flame proof, moisture resistant, pulse withstanding, and safety certifications. The part is currently active in production with 729 units in stock. Equivalent and substitute parts are identified when electrical specifications, mechanical form factor, and compliance certifications align with the original component requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 5 Ohms |
| Tolerance | ±1% |
| Power Rating | 5W |
| Composition | Wirewound |
| Package Type | Axial |
| Temperature Coefficient | ±50ppm/°C |
| Operating Temperature Range | -55°C ~ 250°C |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the UB5C-5RF1 is determined by strict alignment of the following parameters:
- Resistance value: 5 Ohms
- Tolerance: ±1%
- Power rating: 5W
- Composition: Wirewound
- Package: Axial through-hole
- Temperature coefficient: ±50ppm/°C
- RoHS3 compliance
- Operating temperature range compatibility
All identified substitute parts meet these core electrical and mechanical criteria. Variations in physical dimensions, packaging format (bulk vs. cut tape), and extended operating temperature ranges do not affect functional substitutability when these primary parameters are matched.
Parameter Comparison
| Parameter | UB5C-5RF1 (Riedon) | 45F5R0E (Ohmite) | ALSR055R000FE12 (Vishay Dale) | RS0055R000FE73 (Vishay Dale) | WHE5R0FET (Ohmite) |
|---|---|---|---|---|---|
| Resistance | 5 Ohms | 5 Ohms | 5 Ohms | 5 Ohms | 5 Ohms |
| Tolerance | ±1% | ±1% | ±1% | ±1% | ±1% |
| Power Rating | 5W | 5W | 5W | 5W | 5W |
| Composition | Wirewound | Wirewound | Wirewound | Wirewound | Wirewound |
| Package | Axial | Axial | Axial | Axial | Axial |
| Temperature Coefficient | ±50ppm/°C | ±50ppm/°C | ±50ppm/°C | ±50ppm/°C | ±50ppm/°C |
| Operating Temperature | -55°C ~ 250°C | Not specified | -65°C ~ 250°C | -65°C ~ 250°C | -55°C ~ 150°C |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Size (Diameter x Length) | 0.250" x 0.500" (6.40mm x 12.70mm) | 0.343" x 0.937" (8.70mm x 23.80mm) | 0.312" x 0.875" (7.92mm x 22.23mm) | 0.312" x 0.875" (7.92mm x 22.23mm) | 0.295" x 0.787" (7.50mm x 20.00mm) |
| Packaging Format | Bulk | Bulk | Bulk | Cut Tape (CT) | Cut Tape (CT) |
Engineering Selection Recommendations
All four substitute parts are active production components with ROHS3 compliance and REACH unaffected or vendor undefined status, matching the regulatory posture of the original UB5C-5RF1.
The 45F5R0E (Ohmite Ohmicone® 40 series) and ALSR055R000FE12 (Vishay Dale ALSR series) are available in bulk packaging, consistent with the original part format. The ALSR055R000FE12 extends the lower operating temperature limit to -65°C, providing broader thermal coverage than the original specification.
The RS0055R000FE73 (Vishay Dale RS series) and WHE5R0FET (Ohmite WH series) are supplied in cut tape format. The RS0055R000FE73 matches the extended temperature range of the ALSR series (-65°C ~ 250°C). The WHE5R0FET operates within a narrower upper temperature limit of 150°C, which may restrict use in high-temperature applications requiring the full 250°C capability of the original part.
Selection should prioritize packaging format alignment with assembly requirements and operating temperature range compatibility with the target application environment.
Frequently Asked Questions (FAQ)
Q: Can WHE5R0FET replace UB5C-5RF1 in all applications?
A: The WHE5R0FET is electrically equivalent for resistance, tolerance, power rating, and temperature coefficient. However, its maximum operating temperature is 150°C, compared to 250°C for the UB5C-5RF1. Applications requiring operation above 150°C must use alternative substitutes such as ALSR055R000FE12 or RS0055R000FE73.
Q: What is the difference between bulk and cut tape packaging?
A: Bulk packaging (45F5R0E, ALSR055R000FE12) is suitable for manual assembly or loose component handling. Cut tape packaging (RS0055R000FE73, WHE5R0FET) is optimized for automated pick-and-place assembly equipment. Selection depends on manufacturing process requirements.
Q: Are all substitutes moisture resistant?
A: The UB5C-5RF1 specifies moisture resistant as a feature. ALSR055R000FE12 and RS0055R000FE73 explicitly list moisture resistant properties. The 45F5R0E and WHE5R0FET do not specify this feature in their documentation. For applications requiring moisture resistance, ALSR055R000FE12 or RS0055R000FE73 are preferred.
Q: Do substitute parts maintain the same physical dimensions?
A: No. The UB5C-5RF1 has the smallest form factor at 0.250" diameter x 0.500" length. All substitutes are physically larger. PCB layout and mechanical clearance must be verified before substitution.
Q: Which substitute offers the broadest operating temperature range?
A: Both ALSR055R000FE12 and RS0055R000FE73 extend the lower operating limit to -65°C while maintaining the 250°C upper limit, providing the widest thermal operating window among available substitutes.
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