Ohmite 43F25R Equivalent & Substitute Parts

Part Overview

The Ohmite 43F25R is a 25 Ohm ±1% 3W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is designed for applications requiring precision resistance with moderate power dissipation in a compact axial package. The part is currently active in production with 767 units in stock. Substitute parts are necessary when packaging requirements differ, compliance certifications need updating, or inventory availability changes across distribution channels.

Substiute Parts

43F25R

OhmiteIn Stock: 87743F25R Datasheet

Current PartRFQ

43F25RE

OhmiteIn Stock: 98943F25RE Datasheet

DirectRFQ

43F25RE

OhmiteIn Stock: 98943F25RE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Ohmite 43F25RE qualifies as a direct substitute for the 43F25R based on identical electrical and mechanical parameters: 25 Ohm resistance, ±1% tolerance, 3W power rating, wirewound composition, axial package configuration, ±20ppm/°C temperature coefficient, and matching physical dimensions of 0.220" Dia x 0.594" L. The primary distinction between these parts is packaging format (tape/reel versus bulk) and RoHS compliance status. Both parts maintain the same series designation (40 series), active product status, and functional performance characteristics required for direct substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the 43F25R and 43F25RE are active production components from Ohmite with identical electrical performance and mechanical compatibility. Selection between these parts depends on specific project requirements:

The 43F25R is suitable for applications where non-RoHS compliance is acceptable or where existing inventory management systems are established for this specific part number.

The 43F25RE is the appropriate choice for designs requiring RoHS compliance certification, as it meets current environmental and material restriction standards. This part also offers improved moisture sensitivity classification (MSL 1 with unlimited shelf life) compared to the main part designation.

Both parts carry the same ECCN classification (EAR99) and are functionally interchangeable in circuit design. Packaging format differences (standard versus bulk) affect procurement and assembly processes but do not impact electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can the 43F25RE be used as a direct replacement for the 43F25R in existing designs?

A: Yes. The 43F25RE provides identical electrical performance and mechanical fit. All critical parameters—resistance value, tolerance, power rating, temperature coefficient, and physical dimensions—are matched. The substitute is suitable for direct board-level replacement without circuit redesign.

Q: What is the primary difference between these two part numbers?

A: The main differences are packaging format (standard versus bulk) and RoHS compliance status. The 43F25R is RoHS non-compliant, while the 43F25RE is RoHS compliant. Electrically and mechanically, both parts are identical.

Q: Does the RoHS compliance difference affect circuit performance?

A: No. RoHS compliance relates to material composition and environmental standards, not electrical performance. Both parts deliver the same 25 Ohm resistance, ±1% tolerance, and 3W power dissipation capability.

Q: Are there any moisture sensitivity concerns with either part?

A: The 43F25R lists moisture sensitivity as not applicable. The 43F25RE specifies MSL 1 (unlimited shelf life), indicating superior moisture resistance. For applications in humid environments or with extended storage requirements, the 43F25RE offers better protection.

Q: Can these parts be used interchangeably in automated assembly processes?

A: Yes, provided the assembly equipment is configured for the appropriate packaging format. The 43F25R uses standard packaging while the 43F25RE uses bulk packaging. Both have identical component dimensions and lead configurations for board placement.

Q: What is the ECCN classification and does it affect procurement?

A: Both parts are classified as EAR99, which is a general classification for most commercial electronic components with no specific export restrictions. This classification does not create additional procurement constraints for either part.