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Equivalent & Substitute Parts for UB3C-5RF8
Part Overview
The Riedon UB3C-5RF8 is a 5 Ohm ±1% 3W axial wirewound resistor designed for current sensing applications. This through-hole component features flame-proof, moisture-resistant, and pulse-withstanding characteristics, with an operating temperature range of -55°C to 250°C. The part is currently active and available in Tape & Reel packaging with 714 units in stock. Equivalent and substitute parts are identified for applications requiring alternative sourcing, packaging formats, or extended availability.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 5 Ohms |
| Tolerance | ±1% |
| Power Rating | 3W |
| Composition | Wirewound |
| Package Type | Axial |
| Temperature Coefficient | ±50ppm/°C |
| Operating Temperature Range | -55°C to 250°C |
| Terminations | 2 |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the UB3C-5RF8 is determined by strict equivalence across the following parameters: resistance value (5 Ohms), tolerance (±1%), power rating (3W), composition (wirewound), package type (axial), and temperature coefficient (±50ppm/°C). All identified substitute parts meet these core electrical and mechanical specifications. Variations in physical dimensions, packaging format (Tape & Reel versus Bulk versus Cut Tape), operating temperature range extensions, and feature sets (such as moisture resistance) do not disqualify substitution but are noted for application-specific selection.
Parameter Comparison
| Parameter | UB3C-5RF8 (Riedon) | 43F5R0E (Ohmite) | ALSR035R000FE12 (Vishay Dale) | RS02B5R000FE70 (Vishay Dale) | WW3FT5R00 (Stackpole) |
|---|---|---|---|---|---|
| Resistance | 5 Ohms | 5 Ohms | 5 Ohms | 5 Ohms | 5 Ohms |
| Tolerance | ±1% | ±1% | ±1% | ±1% | ±1% |
| Power Rating | 3W | 3W | 3W | 3W | 3W |
| Composition | Wirewound | Wirewound | Wirewound | Wirewound | Wirewound |
| Package Type | Axial | Axial | Axial | Axial | Axial |
| Temperature Coefficient | ±50ppm/°C | ±50ppm/°C | ±50ppm/°C | ±50ppm/°C | ±50ppm/°C |
| Operating Temperature Range | -55°C to 250°C | Not specified | -65°C to 250°C | -65°C to 250°C | -55°C to 350°C |
| Packaging Format | Tape & Reel (TR) | Bulk | Bulk | Cut Tape (CT) | Cut Tape (CT) |
| RoHS Status | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | Not Applicable | Not Applicable |
| Inventory Availability | 714 Pcs | 6823 Pcs | 820 Pcs | 4562 Pcs | 2004 Pcs |
Engineering Selection Recommendations
All substitute parts are active products with ROHS3 compliance or equivalent RoHS certification, ensuring regulatory alignment with the primary part. Selection among substitutes should be based on packaging requirements and inventory availability:
The Ohmite 43F5R0E offers the highest inventory level (6823 units) and is suitable for applications where bulk packaging is acceptable. The Vishay Dale ALSR035R000FE12 and RS02B5R000FE70 both extend the lower operating temperature limit to -65°C, providing enhanced performance in cryogenic environments compared to the primary part. The Stackpole WW3FT5R00 extends the upper operating temperature to 350°C, accommodating high-temperature applications beyond the primary part's 250°C maximum. Cut Tape packaging (RS02B5R000FE70 and WW3FT5R00) is appropriate for lower-volume production runs, while Bulk packaging (43F5R0E and ALSR035R000FE12) suits high-volume assembly operations.
Frequently Asked Questions (FAQ)
Q: Can the Ohmite 43F5R0E replace the Riedon UB3C-5RF8 in all applications?
A: Yes, the 43F5R0E meets all core electrical specifications (5 Ohms, ±1%, 3W, wirewound, axial package, ±50ppm/°C). The primary difference is packaging format (Bulk versus Tape & Reel) and unspecified operating temperature range. Verify operating temperature requirements for your application.
Q: What is the advantage of selecting Vishay Dale parts over the primary Riedon part?
A: Both ALSR035R000FE12 and RS02B5R000FE70 extend the lower operating temperature to -65°C and include moisture-resistant features. These characteristics are beneficial for applications requiring enhanced environmental protection or operation in extended temperature ranges.
Q: Are there dimensional differences between substitute parts?
A: Yes. Physical dimensions vary across manufacturers: UB3C-5RF8 is 0.157" Dia × 0.350" L; 43F5R0E is 0.220" Dia × 0.594" L; ALSR035R000FE12 is 0.180" Dia × 0.500" L; RS02B5R000FE70 is 0.187" Dia × 0.560" L; WW3FT5R00 is 0.187" Dia × 0.560" L. Verify PCB layout and mechanical clearance before substitution.
Q: Which substitute part offers the widest operating temperature range?
A: The Stackpole WW3FT5R00 operates from -55°C to 350°C, providing the highest upper temperature limit. This part is suitable for high-temperature applications where the primary part's 250°C maximum is insufficient.
Q: What packaging formats are available among substitute parts?
A: Tape & Reel (primary part only), Bulk (Ohmite 43F5R0E and Vishay Dale ALSR035R000FE12), and Cut Tape (Vishay Dale RS02B5R000FE70 and Stackpole WW3FT5R00). Select based on assembly process requirements and production volume.
Q: Are all substitute parts RoHS compliant?
A: Yes. All substitute parts carry RoHS or ROHS3 certification, ensuring compliance with hazardous substance restrictions.
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