43FR13 Equivalent & Substitute Parts

Part Overview

The Ohmite 43FR13 is a 130 mOhms ±1% 3W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is designed for applications requiring low-resistance precision dissipation in compact form factors. The part maintains active product status with 1170 units in current inventory. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and application-specific requirements where mechanical or compliance specifications differ from the primary offering.

Substiute Parts

43FR13

OhmiteIn Stock: 127943FR13 Datasheet

Current PartRFQ

ALSR03R1300FE12

Vishay DaleIn Stock: 1078ALSR03R1300FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 43FR13 is determined by strict equivalence across the following critical parameters:

• Resistance value: 130 mOhms (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)

The Vishay Dale ALSR03R1300FE12 meets all substitution criteria. This part is functionally equivalent in electrical performance and mechanical interface. Differences in physical dimensions, temperature coefficient specification availability, and RoHS compliance status are noted in the parameter comparison table below.

Parameter Comparison

Engineering Selection Recommendations

Both the 43FR13 and ALSR03R1300FE12 are active products suitable for direct substitution based on electrical and mechanical equivalence. Selection between these parts should consider the following factors:

RoHS Compliance: The ALSR03R1300FE12 is ROHS3 compliant, making it the appropriate choice for applications subject to RoHS directives or customer requirements mandating lead-free construction. The 43FR13 is non-compliant and suitable only for applications without such restrictions.

Physical Dimensions: The ALSR03R1300FE12 is smaller (0.180" Dia x 0.500" L) compared to the 43FR13 (0.220" Dia x 0.594" L). Space-constrained designs may benefit from the Vishay Dale part, provided PCB layout and thermal management accommodate the smaller form factor.

Moisture Resistance: The ALSR03R1300FE12 includes moisture-resistant construction, providing enhanced reliability in humid or corrosive environments. The 43FR13 does not specify this feature.

Operating Temperature Range: The ALSR03R1300FE12 specifies an operating range of -65°C ~ 250°C. The 43FR13 does not provide this specification. Applications requiring extended temperature operation should verify compatibility with the Ohmite part's undocumented limits.

Product Status: Both parts maintain active status with adequate inventory levels, ensuring supply continuity.

Frequently Asked Questions (FAQ)

Q: Can the ALSR03R1300FE12 directly replace the 43FR13 in existing designs?

A: Yes, the ALSR03R1300FE12 is electrically and mechanically equivalent. Both parts share identical resistance (130 mOhms), tolerance (±1%), power rating (3W), composition (wirewound), and axial package configuration. Physical dimensions differ slightly; verify PCB layout clearances before substitution.

Q: What is the primary reason to substitute the 43FR13 with the ALSR03R1300FE12?

A: The ALSR03R1300FE12 is ROHS3 compliant, making it mandatory for applications subject to RoHS regulations or customer specifications requiring lead-free components. The 43FR13 is non-compliant and cannot be used in such applications.

Q: Are there differences in thermal performance between these parts?

A: Both parts are rated for 3W power dissipation. The ALSR03R1300FE12 specifies an operating temperature range of -65°C ~ 250°C. The 43FR13 does not provide this specification. Thermal performance depends on circuit design, PCB layout, and ambient conditions rather than part selection alone.

Q: Does the smaller size of the ALSR03R1300FE12 affect reliability?

A: No. The ALSR03R1300FE12 is a qualified wirewound resistor with moisture-resistant construction and active product status. Smaller dimensions do not compromise electrical or mechanical reliability. Verify PCB layout accommodates the reduced form factor.

Q: What is the moisture sensitivity level difference?

A: The ALSR03R1300FE12 has MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling. The 43FR13 lists MSL as Not Applicable. This difference is not a limiting factor for substitution.

Q: Can I use the 43FR13 in applications requiring RoHS compliance?

A: No. The 43FR13 is RoHS non-compliant. Applications subject to RoHS directives must use the ROHS3-compliant ALSR03R1300FE12 or equivalent.