Equivalent & Substitute Parts for Ohmite 43F3K0

Part Overview

The Ohmite 43F3K0 is a 3 kOhms ±1% 3W through-hole resistor with axial wirewound composition, part of the Ohmicone® 40 series. This component is currently active in production with 909 pieces in stock. The need for equivalent and substitute parts arises from packaging variations, compliance requirements, and supply chain considerations. Two direct substitutes are available that maintain the core electrical specifications while offering different packaging options and regulatory compliance profiles.

Substiute Parts

43F3K0

OhmiteIn Stock: 96743F3K0 Datasheet

Current PartRFQ

43F3K0E

OhmiteIn Stock: 139343F3K0E Datasheet

DirectRFQ

ALSR033K000FE12

Vishay DaleIn Stock: 1019ALSR033K000FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Ohmite 43F3K0 is determined by the following critical parameters:

• Electrical Match: Resistance value (3 kOhms), tolerance (±1%), and power rating (3W) must be identical
• Physical Form: Axial package configuration with two terminations required
• Composition: Wirewound construction maintained across all substitutes
• Regulatory Compliance: RoHS3 compliance preferred for new designs; REACH status documented

The two identified substitutes meet all mandatory electrical and physical criteria. The primary distinction between substitutes lies in packaging format (bulk vs. standard), physical dimensions, temperature coefficient specification, and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

For RoHS3 Compliant Applications: The Ohmite 43F3K0E is the preferred substitute. It maintains identical electrical specifications and physical dimensions to the main part while achieving ROHS3 compliance. This part is from the same manufacturer and series, ensuring design continuity.

For Compact Form Factor Requirements: The Vishay Dale ALSR033K000FE12 offers a smaller physical footprint (0.180" Dia x 0.500" L versus 0.220" Dia x 0.594" L) while maintaining all core electrical parameters. This substitute is suitable for space-constrained applications and includes moisture-resistant features. The temperature coefficient specification is ±30ppm/°C compared to ±20ppm/°C for the main part.

For Legacy or Non-Compliant Designs: The original Ohmite 43F3K0 remains available with 909 pieces in stock and maintains the tightest temperature coefficient specification at ±20ppm/°C.

All three parts carry identical ECCN (EAR99) and HTSUS (8533.21.0080) classifications.

Frequently Asked Questions (FAQ)

Q: Can the 43F3K0E be used as a direct replacement for the 43F3K0?

A: Yes. The 43F3K0E is electrically and physically identical to the 43F3K0, with the primary difference being RoHS3 compliance and bulk packaging. Both parts are from Ohmite's Ohmicone® 40 series with matching dimensions (0.220" Dia x 0.594" L) and temperature coefficient (±20ppm/°C).

Q: What are the dimensional differences between the Ohmite and Vishay Dale substitutes?

A: The Ohmite 43F3K0E maintains the original dimensions of 0.220" Dia x 0.594" L (5.60mm x 15.10mm). The Vishay Dale ALSR033K000FE12 is smaller at 0.180" Dia x 0.500" L (4.57mm x 12.70mm). This size reduction may affect PCB layout and mechanical clearance considerations.

Q: Does the Vishay Dale ALSR033K000FE12 have any additional features?

A: Yes. The ALSR033K000FE12 includes moisture-resistant construction and specifies an operating temperature range of -65°C to 250°C. Its temperature coefficient is ±30ppm/°C, which is 10ppm/°C higher than the Ohmite parts.

Q: Are all three parts RoHS compliant?

A: The original 43F3K0 is RoHS non-compliant. Both substitutes (43F3K0E and ALSR033K000FE12) are ROHS3 compliant, making them suitable for applications requiring regulatory compliance.

Q: What is the difference in packaging between the main part and the 43F3K0E?

A: The main part 43F3K0 uses standard packaging, while the 43F3K0E is supplied in bulk packaging. Both are identical in electrical and physical specifications.