43F35R Equivalent & Substitute Parts Reference

Part Overview

The 43F35R is a 35 Ohm ±1% 3W axial wirewound through-hole resistor manufactured by Ohmite in the Ohmicone® 40 series. This component is currently active in production and widely used in applications requiring precision power resistors with tight tolerance specifications. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits alternative sourcing from qualified manufacturers meeting identical or superior electrical and mechanical specifications.

Substiute Parts

43F35R

OhmiteIn Stock: 73443F35R Datasheet

Current PartRFQ

43F35RE

OhmiteIn Stock: 104943F35RE Datasheet

DirectRFQ

ALSR0335R00FE12

Vishay DaleIn Stock: 958ALSR0335R00FE12 Datasheet

DirectRFQ

RS02B35R00FS70

Vishay DaleIn Stock: 2157RS02B35R00FS70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 43F35R are qualified based on the following critical parameters that determine functional equivalence:

• Resistance value: 35 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 3W (exact match required)
• Composition: Wirewound (exact match required)
• Package type: Axial (exact match required)
• Number of terminations: 2 (exact match required)

All identified substitutes meet these core electrical and mechanical requirements. Variations in temperature coefficient, physical dimensions, and compliance certifications are noted but do not prevent functional substitution when the above parameters align.

Parameter Comparison

Engineering Selection Recommendations

43F35RE (Ohmite): Direct equivalent from the same manufacturer with identical electrical specifications and physical dimensions. Offers ROHS3 compliance upgrade over the original 43F35R. Recommended as the primary substitute when Ohmite sourcing is preferred and RoHS compliance is required.

ALSR0335R00FE12 (Vishay Dale): Meets all core electrical requirements with ±1% tolerance and 3W power rating. Features moisture-resistant construction and ROHS3 compliance. Physical dimensions are slightly smaller (0.180" Dia x 0.500" L). Temperature coefficient is ±30ppm/°C versus ±20ppm/°C on the original. Suitable for applications where moisture resistance and RoHS compliance are design requirements and physical space permits the smaller form factor.

RS02B35R00FS70 (Vishay Dale): Meets all core electrical requirements with ±20ppm/°C temperature coefficient matching the original specification. Features moisture-resistant construction. Physical dimensions are comparable to the original (0.187" Dia x 0.560" L). Maintains RoHS non-compliant status consistent with the 43F35R. Recommended when moisture resistance is required and RoHS compliance is not a design constraint.

Frequently Asked Questions (FAQ)

Q: Can 43F35RE be used as a direct replacement for 43F35R? A: Yes. Both parts are manufactured by Ohmite with identical resistance (35 Ohms), tolerance (±1%), power rating (3W), and physical dimensions (0.220" Dia x 0.594" L). The primary difference is RoHS compliance status, with 43F35RE offering ROHS3 certification.

Q: What is the impact of different physical dimensions among substitutes? A: Physical dimensions affect PCB layout and mechanical fit. ALSR0335R00FE12 (0.180" Dia x 0.500" L) and RS02B35R00FS70 (0.187" Dia x 0.560" L) are smaller than the original 43F35R (0.220" Dia x 0.594" L). Verify PCB hole spacing and component clearance before substitution.

Q: Does temperature coefficient variation affect substitution suitability? A: Temperature coefficient determines resistance stability across operating temperature ranges. ALSR0335R00FE12 has ±30ppm/°C versus ±20ppm/°C on the original and other substitutes. For applications with strict temperature stability requirements, maintain ±20ppm/°C specification.

Q: Are moisture-resistant variants necessary? A: Moisture-resistant construction (ALSR0335R00FE12 and RS02B35R00FS70) provides enhanced performance in humid or corrosive environments. Standard construction (43F35R and 43F35RE) is suitable for controlled indoor applications.

Q: What is the significance of RoHS compliance differences? A: ROHS3-compliant parts (43F35RE and ALSR0335R00FE12) meet European Union Restriction of Hazardous Substances regulations. RoHS non-compliant parts (43F35R and RS02B35R00FS70) may face restrictions in certain markets or applications. Verify compliance requirements for your end application.

Q: Can substitutes be used interchangeably in existing designs? A: Electrical substitution is valid when resistance, tolerance, power rating, and package type match. Mechanical substitution requires verification of PCB layout compatibility, particularly for parts with different physical dimensions. Thermal performance should be evaluated for applications operating near power rating limits.