43F7R5 Equivalent & Substitute Parts

Part Overview

The 43F7R5 is a 7.5 Ohm ±1% 3W axial wirewound through-hole resistor manufactured by Ohmite in the Ohmicone® 40 series. This component is currently active in production with 1072 pieces in stock. Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating) and mechanical compatibility (axial package, through-hole termination). Alternative sources become necessary for supply chain continuity, compliance requirements, or specific application constraints.

Key Parameters

Parameter	Specification
Resistance	7.5 Ohms
Tolerance	±1%
Power Rating	3W
Composition	Wirewound
Package Type	Axial
Temperature Coefficient	±50ppm/°C
Terminations	2 (Through Hole)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters:

Resistance value: 7.5 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)
Temperature coefficient: ±50ppm/°C (exact match required)

All identified substitute parts meet these criteria. Variations in physical dimensions, packaging format (bulk vs. cut tape), RoHS compliance status, and moisture resistance features do not affect electrical interchangeability for this application category.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Composition	Temp Coeff	Package	Size (mm)	RoHS Status	Inventory
43F7R5	Ohmite	7.5 Ω	±1%	3	Wirewound	±50ppm/°C	Axial	5.60 x 15.10	Non-compliant	1072
43F7R5E	Ohmite	7.5 Ω	±1%	3	Wirewound	±50ppm/°C	Axial	5.60 x 15.10	ROHS3 Compliant	1024
ALSR037R500FE12	Vishay Dale	7.5 Ω	±1%	3	Wirewound	±50ppm/°C	Axial	4.57 x 12.70	ROHS3 Compliant	1037
RS02B7R500FS70	Vishay Dale	7.5 Ω	±1%	3	Wirewound	±50ppm/°C	Axial	4.75 x 14.22	Non-compliant	1678

Engineering Selection Recommendations

43F7R5E (Ohmite): Direct manufacturer equivalent with identical electrical and mechanical specifications. Offers ROHS3 compliance upgrade from the original 43F7R5. Recommended for applications requiring RoHS certification. Same physical dimensions ensure direct board-level substitution.

ALSR037R500FE12 (Vishay Dale): Electrically equivalent with ROHS3 compliance and moisture-resistant construction. Smaller physical dimensions (4.57mm diameter vs. 5.60mm) and extended operating temperature range (-65°C to 250°C). Suitable for space-constrained layouts and high-temperature environments. Moisture resistance feature provides additional environmental protection.

RS02B7R500FS70 (Vishay Dale): Manufacturer-recommended equivalent with moisture-resistant construction and extended operating temperature range. Supplied in cut tape packaging. Maintains RoHS non-compliant status matching the original part. Highest inventory availability (1678 units). Suitable for applications where RoHS compliance is not required.

Frequently Asked Questions (FAQ)

Q: Can 43F7R5E be used as a direct replacement for 43F7R5?

A: Yes. Both parts are manufactured by Ohmite with identical electrical specifications (7.5 Ohms ±1%, 3W) and physical dimensions (5.60mm x 15.10mm). The primary difference is RoHS3 compliance status of 43F7R5E. Direct board-level substitution is supported.

Q: What are the physical dimension differences between substitute parts?

A: 43F7R5 and 43F7R5E: 5.60mm diameter x 15.10mm length. ALSR037R500FE12: 4.57mm diameter x 12.70mm length. RS02B7R500FS70: 4.75mm diameter x 14.22mm length. Smaller dimensions may affect PCB layout spacing but do not impact electrical performance.

Q: Are all substitute parts electrically interchangeable?

A: Yes. All listed parts meet the core electrical requirements: 7.5 Ohms ±1% tolerance, 3W power rating, ±50ppm/°C temperature coefficient, and wirewound axial construction. Electrical interchangeability is guaranteed across all substitutes.

Q: Which substitute offers the best environmental protection?

A: Both ALSR037R500FE12 and RS02B7R500FS70 feature moisture-resistant construction and extended operating temperature range (-65°C to 250°C). ALSR037R500FE12 additionally provides ROHS3 compliance and moisture sensitivity level 1 (unlimited).

Q: Does packaging format affect component performance?

A: No. Packaging format (bulk vs. cut tape) affects handling and supply chain logistics only. Electrical and mechanical performance remains identical. 43F7R5E is supplied in bulk packaging; RS02B7R500FS70 is supplied in cut tape format.

Q: What is the significance of RoHS compliance differences?

A: RoHS compliance status determines regulatory eligibility for specific markets and applications. 43F7R5E and ALSR037R500FE12 are ROHS3 compliant; 43F7R5 and RS02B7R500FS70 are non-compliant. Selection depends on end-product regulatory requirements.

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