Ohmite 45F180 Equivalent & Substitute Parts

Part Overview

The Ohmite 45F180 is a 180 Ohm ±1% 5W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is classified as Active product status and is suitable for applications requiring precision resistive elements in power dissipation circuits. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part becomes unavailable or when alternative compliance certifications are required.

Substiute Parts

45F180

OhmiteIn Stock: 95645F180 Datasheet

Current PartRFQ

45F180E

OhmiteIn Stock: 90245F180E Datasheet

DirectRFQ

ALSR05180R0FE12

Vishay DaleIn Stock: 1103ALSR05180R0FE12 Datasheet

DirectRFQ

RS005180R0FS73

Vishay DaleIn Stock: 1361RS005180R0FS73 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Ohmite 45F180 is determined by the following core parameters: resistance value (180 Ohms), tolerance (±1%), power rating (5W), composition (wirewound), and package configuration (axial with 2 terminations). All identified substitute parts meet these electrical and mechanical requirements. Substitutes are grouped based on manufacturer identity, packaging format, and compliance certifications. The primary distinction among substitutes relates to RoHS compliance status, temperature coefficient specifications, and operating temperature ranges, which are provided in the detailed parameter comparison.

Parameter Comparison

Engineering Selection Recommendations

Ohmite 45F180E is a direct equivalent manufactured by Ohmite with identical electrical specifications and ROHS3 compliance certification. This substitute is appropriate for applications requiring RoHS-compliant components and maintains the same temperature coefficient and package dimensions as the primary part.

Vishay Dale ALSR05180R0FE12 meets all core electrical and mechanical requirements with ROHS3 compliance. This substitute features an extended operating temperature range (-65°C ~ 250°C) and moisture-resistant construction. The temperature coefficient is ±30ppm/°C, which represents a 50% increase relative to the primary part. Physical dimensions are slightly reduced (0.312" Dia x 0.875" L versus 0.343" Dia x 0.937" L). This substitute is suitable for applications requiring enhanced environmental protection and extended temperature operation.

Vishay Dale RS005180R0FS73 is a manufacturer-recommended substitute that maintains the ±20ppm/°C temperature coefficient and extended operating temperature range (-65°C ~ 250°C). This part is supplied in Cut Tape packaging format and is RoHS non-compliant. Selection of this substitute is appropriate when RoHS compliance is not a design requirement and Cut Tape packaging format is compatible with assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the Ohmite 45F180E be used as a direct replacement for the Ohmite 45F180?

A: Yes. The 45F180E is manufactured by Ohmite with identical resistance (180 Ohms), tolerance (±1%), power rating (5W), temperature coefficient (±20ppm/°C), and axial package configuration. The primary difference is ROHS3 compliance certification on the 45F180E. Both parts are electrically and mechanically interchangeable.

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

A: The Ohmite 45F180 and 45F180E measure 0.343" Dia x 0.937" L (8.70mm x 23.80mm). The Vishay Dale ALSR05180R0FE12 and RS005180R0FS73 measure 0.312" Dia x 0.875" L (7.92mm x 22.23mm). These dimensional differences must be evaluated against circuit board layout and mechanical clearance requirements.

Q: Which substitute part should be selected for RoHS-compliant applications?

A: Both the Ohmite 45F180E and Vishay Dale ALSR05180R0FE12 carry ROHS3 compliance certification. The Ohmite 45F180E maintains identical specifications to the primary part. The Vishay Dale ALSR05180R0FE12 provides extended operating temperature range and moisture-resistant features.

Q: What is the significance of the temperature coefficient difference in the Vishay Dale ALSR05180R0FE12?

A: The Vishay Dale ALSR05180R0FE12 specifies ±30ppm/°C compared to ±20ppm/°C for the primary part and other substitutes. This indicates a greater resistance value change per degree Celsius of temperature variation. Applications requiring tighter temperature stability should prioritize parts with ±20ppm/°C specifications.

Q: Are the Vishay Dale substitutes available in different packaging formats?

A: Yes. The ALSR05180R0FE12 is supplied in Bulk packaging, while the RS005180R0FS73 is supplied in Cut Tape (CT) format. Packaging selection depends on assembly process requirements and inventory management practices.

Q: What is the operating temperature range for the primary Ohmite 45F180?

A: The operating temperature range for the Ohmite 45F180 is not specified in the provided data. The Vishay Dale substitutes specify -65°C ~ 250°C operating range. Applications requiring defined temperature operating limits should reference the Vishay Dale alternatives or contact the manufacturer for Ohmite specifications.