Ohmite 40F3R0 Equivalent & Substitute Parts

Part Overview

The Ohmite 40F3R0 is a 3 Ohm, ±1% tolerance, 10W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision resistance with moderate power dissipation in compact axial form factor. The part is currently active in production with 655 units in stock. Substitute parts are identified to address packaging variations and compliance requirements while maintaining identical electrical and mechanical specifications.

Substiute Parts

40F3R0

OhmiteIn Stock: 69540F3R0 Datasheet

Current PartRFQ

40F3R0E

OhmiteIn Stock: 116940F3R0E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 40F3R0 is determined by the following parameters:

• Resistance value: 3 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 10W (exact match required)
• Composition: Wirewound (exact match required)
• Package type: Axial (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• Physical dimensions: 0.406" Dia x 1.902" L (exact match required)
• Number of terminations: 2 (exact match required)

The identified substitute part 40F3R0E meets all electrical and mechanical parameters. The primary distinction between the main part and substitute is packaging configuration (standard vs. bulk) and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

Both the 40F3R0 and 40F3R0E are active production components from Ohmite's Ohmicone® 40 series with identical electrical and mechanical specifications. Selection between these parts should be based on the following criteria:

40F3R0 is appropriate for applications where RoHS non-compliant components are acceptable and standard packaging is preferred.

40F3R0E is appropriate for applications requiring ROHS3 compliance and bulk packaging configurations. This variant offers higher inventory availability (1136 units vs. 655 units).

Both parts are suitable for direct substitution in circuits requiring 3 Ohm, 10W axial wirewound resistors with ±1% tolerance and ±50ppm/°C temperature coefficient.

Frequently Asked Questions (FAQ)

Q: Can 40F3R0E be used as a direct replacement for 40F3R0?

A: Yes. Both parts are electrically and mechanically identical. The 40F3R0E differs only in packaging configuration (bulk vs. standard) and RoHS compliance status (ROHS3 compliant vs. non-compliant).

Q: What is the primary difference between these substitute parts?

A: The main differences are packaging type and regulatory compliance. The 40F3R0E is supplied in bulk packaging and meets ROHS3 compliance requirements, while the 40F3R0 uses standard packaging and is RoHS non-compliant.

Q: Are the physical dimensions identical between 40F3R0 and 40F3R0E?

A: Yes. Both parts have identical physical dimensions of 0.406" diameter by 1.902" length (10.30mm x 48.30mm), ensuring identical PCB footprint and mounting requirements.

Q: Which part should be selected for new designs?

A: Selection depends on regulatory requirements. For applications requiring ROHS3 compliance, the 40F3R0E is the appropriate choice. For applications without RoHS compliance requirements, either part is suitable based on packaging needs.

Q: Do these parts have identical electrical performance?

A: Yes. Both parts have identical resistance (3 Ohms), tolerance (±1%), power rating (10W), temperature coefficient (±50ppm/°C), and composition (wirewound).