Equivalent & Substitute Parts for 45F3K5

Part Overview

The 45F3K5 is a 4.6 kOhms ±1% 5W through-hole resistor with axial wirewound composition, manufactured by Ohmite as part of the Ohmicone® 40 series. This component is currently active in production with 668 pieces available in stock. The need for equivalent and substitute parts arises from packaging variations, compliance requirements, and supply chain considerations across different manufacturing environments.

Substiute Parts

45F3K5

OhmiteIn Stock: 69245F3K5 Datasheet

Current PartRFQ

45F3K5E

OhmiteIn Stock: 70545F3K5E Datasheet

DirectRFQ

ALSR053K500FE12

Vishay DaleIn Stock: 1051ALSR053K500FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 45F3K5 is determined by strict equivalence across the following electrical and mechanical parameters:

• Resistance value: 4.6 kOhms
• Tolerance: ±1%
• Power rating: 5W
• Composition: Wirewound
• Package configuration: Axial with 2 terminations
• Physical form factor: Compatible dimensions for through-hole mounting

The identified substitutes maintain these core specifications while differing in packaging format, compliance certifications, and secondary features such as moisture resistance and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

45F3K5E (Ohmite): This part is a direct equivalent to the 45F3K5 with identical electrical specifications and physical dimensions. The primary distinction is packaging format (bulk versus standard) and RoHS3 compliance status. Selection of 45F3K5E is appropriate for applications requiring RoHS3 compliance or when bulk packaging is preferred.

ALSR053K500FE12 (Vishay Dale): This substitute maintains electrical equivalence across resistance, tolerance, and power rating. Physical dimensions are slightly reduced (0.312" Dia x 0.875" L versus 0.343" Dia x 0.937" L), which may affect board layout considerations. The ALSR series includes moisture-resistant construction and operates across an extended temperature range (-65°C to 250°C). This part is RoHS3 compliant and suitable for applications requiring enhanced environmental protection.

Frequently Asked Questions (FAQ)

Q: Can 45F3K5E be used as a direct replacement for 45F3K5?

A: Yes. Both parts share identical electrical specifications (4.6 kOhms ±1% 5W wirewound) and physical dimensions (0.343" Dia x 0.937" L). The difference is packaging format and RoHS compliance status.

Q: What are the dimensional differences between 45F3K5 and ALSR053K500FE12?

A: The ALSR053K500FE12 has a slightly smaller diameter (0.312" versus 0.343") and shorter length (0.875" versus 0.937"). These differences may require board layout verification for through-hole mounting applications.

Q: Which substitute is suitable for RoHS3 compliant applications?

A: Both 45F3K5E and ALSR053K500FE12 are RoHS3 compliant. The original 45F3K5 is RoHS non-compliant.

Q: What is the temperature coefficient difference between substitutes?

A: The 45F3K5 and 45F3K5E have a temperature coefficient of ±20ppm/°C, while the ALSR053K500FE12 has ±30ppm/°C. This difference is relevant for precision applications requiring tight temperature stability.

Q: Does ALSR053K500FE12 offer additional environmental protection?

A: Yes. The ALSR053K500FE12 includes moisture-resistant construction and operates across -65°C to 250°C, compared to the standard Ohmite parts which do not specify an operating temperature range.