UB3C-56RF8 Equivalent & Substitute Parts

Part Overview

The UB3C-56RF8 is a 56 Ohm ±1% 3W axial wirewound resistor manufactured by Riedon. This through-hole component is designed for current sense applications and features flame proof, moisture resistant, pulse withstanding, and safety certifications. The part is currently active in production with 917 units in stock. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory compliance align with the original component requirements.

Substiute Parts

UB3C-56RF8

RiedonIn Stock: 963UB3C-56RF8 Datasheet

Current PartRFQ

43F56RE

OhmiteIn Stock: 195843F56RE Datasheet

MFR RecommendedRFQ

WW3FT56R0

Stackpole Electronics IncIn Stock: 1195WW3FT56R0 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UB3C-56RF8 is determined by strict equivalence across the following parameters:

• Resistance value: 56 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package: Axial through-hole
• Temperature coefficient: ±20ppm/°C
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

The identified substitute parts meet all core electrical specifications. Physical dimensions vary within acceptable axial package tolerances. Both substitute parts maintain active product status and equivalent regulatory certifications.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active product status and equivalent regulatory compliance (ROHS3 Compliant, REACH Unaffected). Selection between the UB3C-56RF8 and its substitutes depends on physical space constraints and operating temperature requirements within the application circuit.

The UB3C-56RF8 offers the smallest physical footprint (0.157" diameter, 0.350" length) and is suitable for space-constrained designs operating within -55°C to 250°C. The WW3FT56R0 provides extended upper temperature capability to 350°C with moderate size increase. The 43F56RE offers standard performance with larger physical dimensions.

All parts are electrically equivalent for applications requiring 56 Ohm ±1% 3W wirewound axial resistors with ±20ppm/°C temperature coefficient.

Frequently Asked Questions (FAQ)

Q: Can the 43F56RE replace the UB3C-56RF8 in all applications?

A: The 43F56RE is electrically equivalent but has larger physical dimensions (0.220" diameter vs. 0.157" diameter). Substitution is valid only if PCB layout accommodates the increased size.

Q: What is the primary difference between the WW3FT56R0 and UB3C-56RF8?

A: Both parts are electrically identical. The WW3FT56R0 supports extended operating temperature to 350°C compared to the UB3C-56RF8 maximum of 250°C. Physical dimensions differ slightly (0.187" vs. 0.157" diameter).

Q: Are all three parts ROHS3 compliant?

A: Yes. The UB3C-56RF8, 43F56RE, and WW3FT56R0 are all ROHS3 Compliant and REACH Unaffected.

Q: Does the UB3C-56RF8 have moisture resistance features?

A: The UB3C-56RF8 includes moisture resistant properties as part of its design. The WW3FT56R0 also specifies moisture resistance. The 43F56RE does not list moisture resistance as a feature.

Q: What packaging formats are available for these parts?

A: The UB3C-56RF8 is supplied in Tape & Reel (TR) format. The 43F56RE is supplied in Bulk packaging. The WW3FT56R0 is supplied in Cut Tape (CT) format. Packaging selection depends on assembly process requirements.