Ohmite 40F180 Equivalent & Substitute Parts

Part Overview

The Ohmite 40F180 is a 180 Ohm, ±1% tolerance, 10W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision resistive elements with high power dissipation capability in a compact axial package. The part is currently active in production with 858 units in stock. Substitute parts are identified when equivalent electrical and mechanical specifications are required, particularly when packaging format or compliance requirements differ from the original specification.

Substiute Parts

40F180

OhmiteIn Stock: 95040F180 Datasheet

Current PartRFQ

40F180E

OhmiteIn Stock: 79940F180E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 40F180E is classified as a parametric equivalent to the 40F180. Substitution is valid based on the following criteria:

• Electrical Parameters: Identical resistance value (180 Ohms), tolerance (±1%), and power rating (10W)
• Composition & Construction: Both are wirewound resistors with matching temperature coefficient (±20ppm/°C)
• Package & Mechanical: Both utilize axial through-hole packaging with identical physical dimensions (0.406" Dia x 1.902" L)
• Termination Configuration: Both feature 2 terminations compatible with standard PCB mounting

The primary distinction between these parts is packaging format (bulk vs. standard) and RoHS compliance status, which does not affect electrical or mechanical interchangeability.

Parameter Comparison

Engineering Selection Recommendations

Both the 40F180 and 40F180E are electrically and mechanically interchangeable for applications requiring 180 Ohm, 10W axial wirewound resistors. Selection between these parts should be based on:

• RoHS Compliance Requirements: The 40F180E meets ROHS3 compliance, while the 40F180 is RoHS non-compliant. Applications subject to RoHS directives must use the 40F180E.
• Packaging & Procurement: The 40F180E is supplied in bulk packaging, suitable for high-volume assembly operations. The 40F180 uses standard packaging for general procurement.
• Inventory Availability: The 40F180 has 858 units in stock; the 40F180E has 758 units in stock.

Both parts carry identical ECCN (EAR99) and HTSUS (8533.21.0080) classifications and are unaffected by REACH regulations.

Frequently Asked Questions (FAQ)

Q: Can the 40F180E replace the 40F180 in existing designs? A: Yes. The 40F180E is electrically and mechanically equivalent. All electrical parameters, physical dimensions, and termination configurations are identical. Substitution is valid for direct PCB mounting applications.

Q: What is the difference between the 40F180 and 40F180E? A: The primary differences are RoHS compliance status (40F180E is ROHS3 compliant; 40F180 is non-compliant) and packaging format (40F180E is bulk; 40F180 is standard). Electrical and mechanical specifications are identical.

Q: Are there any thermal or performance differences between these parts? A: No. Both parts have identical power ratings (10W), temperature coefficients (±20ppm/°C), and thermal characteristics. Performance in circuit applications is equivalent.

Q: Which part should I specify for new designs? A: Selection depends on regulatory requirements. For applications requiring RoHS compliance, specify the 40F180E. For non-regulated applications, either part is acceptable based on availability and packaging needs.

Q: Are the physical dimensions identical? A: Yes. Both parts measure 0.406" diameter by 1.902" length (10.30mm x 48.30mm). PCB footprints and mounting clearances are identical.

Q: Can these parts be used interchangeably in production? A: Yes, provided compliance requirements are met. The 40F180E is recommended for new production due to ROHS3 compliance. Existing designs using the 40F180 can transition to the 40F180E without circuit modifications.