Ohmite 43F350 Equivalent & Substitute Parts

Part Overview

The Ohmite 43F350 is a 350 Ohm ±1% 3W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is classified as Active product status and is currently in stock with 689 pieces available. The need for equivalent and substitute parts arises from packaging variations, compliance requirements, and supply chain considerations across different manufacturing and distribution channels.

Substiute Parts

43F350

OhmiteIn Stock: 78243F350 Datasheet

Current PartRFQ

43F350E

OhmiteIn Stock: 83843F350E Datasheet

DirectRFQ

ALSR03350R0FE12

Vishay DaleIn Stock: 1247ALSR03350R0FE12 Datasheet

DirectRFQ

RS02B350R0FS70

Vishay DaleIn Stock: 1796RS02B350R0FS70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Ohmite 43F350 is determined by the following core electrical and mechanical parameters:

• Resistance value: 350 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 3W (exact match required)
• Composition: Wirewound (exact match required)
• Package: Axial through-hole (exact match required)
• Number of terminations: 2 (exact match required)

All substitute parts listed meet these mandatory criteria. Variations in temperature coefficient, physical dimensions, and compliance certifications do not disqualify substitution but may influence selection based on application requirements and regulatory constraints.

Parameter Comparison

Engineering Selection Recommendations

43F350E (Ohmite): Direct equivalent from the same manufacturer with identical electrical specifications and physical dimensions. Offers ROHS3 compliance, making it suitable for applications with RoHS regulatory requirements. Recommended as the primary substitute when RoHS compliance is mandatory.

ALSR03350R0FE12 (Vishay Dale): Cross-manufacturer substitute with identical core electrical parameters. Features moisture-resistant construction and specified operating temperature range (-65°C ~ 250°C). Slightly smaller physical dimensions (0.180" Dia x 0.500" L) and higher temperature coefficient (±30ppm/°C). ROHS3 compliant. Suitable for applications requiring extended temperature operation and moisture resistance.

RS02B350R0FS70 (Vishay Dale): Cross-manufacturer substitute with identical electrical specifications and temperature coefficient (±20ppm/°C). Includes moisture-resistant features and specified operating temperature range (-65°C ~ 250°C). Physical dimensions (0.187" Dia x 0.560" L) fall between the main part and ALSR variant. RoHS non-compliant. Highest inventory availability (1695 Pcs). Suitable for applications where RoHS compliance is not required and extended temperature operation is needed.

Frequently Asked Questions (FAQ)

Q: Can 43F350E be used as a direct replacement for 43F350? A: Yes. The 43F350E is electrically and mechanically identical to the 43F350, with identical resistance, tolerance, power rating, temperature coefficient, and physical dimensions. The primary difference is packaging format (Bulk) and improved RoHS3 compliance status.

Q: What are the physical dimension differences between substitute parts? A: The main part 43F350 and 43F350E measure 0.220" Dia x 0.594" L. The ALSR03350R0FE12 is smaller at 0.180" Dia x 0.500" L. The RS02B350R0FS70 measures 0.187" Dia x 0.560" L. These dimensional variations may affect PCB layout and mechanical fit in space-constrained applications.

Q: Which substitute is recommended for RoHS-compliant applications? A: The 43F350E (ROHS3 Compliant) or ALSR03350R0FE12 (ROHS3 Compliant) are suitable for RoHS-regulated applications. The main part 43F350 and RS02B350R0FS70 are RoHS non-compliant.

Q: Are there differences in temperature performance between substitutes? A: The main part 43F350 does not specify an operating temperature range. The ALSR03350R0FE12 and RS02B350R0FS70 both specify -65°C ~ 250°C operation. The ALSR03350R0FE12 has a higher temperature coefficient (±30ppm/°C) compared to the main part and RS02B350R0FS70 (both ±20ppm/°C).

Q: What packaging formats are available? A: The 43F350 and 43F350E are supplied in Bulk packaging. The ALSR03350R0FE12 is supplied in Bulk. The RS02B350R0FS70 is supplied in Cut Tape (CT) format, suitable for automated assembly processes.

Q: Do all substitutes have moisture-resistant features? A: The main part 43F350 and 43F350E do not specify moisture-resistant features. The ALSR03350R0FE12 and RS02B350R0FS70 both feature moisture-resistant construction.