Ohmite 45F1R5 Equivalent & Substitute Parts

Part Overview

The Ohmite 45F1R5 is a 1.5 Ohm ±1% 5W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production with 871 pieces in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part becomes unavailable or when alternative packaging or compliance requirements necessitate component substitution.

Substiute Parts

45F1R5

OhmiteIn Stock: 97645F1R5 Datasheet

Current PartRFQ

45F1R5E

OhmiteIn Stock: 99645F1R5E Datasheet

DirectRFQ

ALSR051R500FE12

Vishay DaleIn Stock: 3714ALSR051R500FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Ohmite 45F1R5 are qualified based on the following electrical and mechanical parameters:

• Resistance value: 1.5 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 5W (exact match required)
• Composition: Wirewound (exact match required)
• Package: Axial through-hole (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• Number of terminations: 2 (exact match required)

Two substitute parts meet these criteria: the Ohmite 45F1R5E and the Vishay Dale ALSR051R500FE12. Both maintain identical electrical specifications and axial package configuration, ensuring functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts are active products with identical electrical and mechanical specifications. Selection between them should be based on compliance and availability requirements:

The Ohmite 45F1R5E is the direct equivalent from the same manufacturer and series, offering ROHS3 compliance with comparable inventory levels.

The Vishay Dale ALSR051R500FE12 provides an alternative from a different manufacturer with ROHS3 compliance, moisture-resistant construction, and significantly higher inventory availability (3606 pieces). This part specifies an operating temperature range of -65°C to 250°C and includes moisture resistance features not detailed in the Ohmite specifications.

The original Ohmite 45F1R5 is RoHS non-compliant and should be considered only when legacy compliance status is acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can the Ohmite 45F1R5E be used as a direct replacement for the Ohmite 45F1R5?

A: Yes. Both parts share identical electrical specifications (1.5 Ohms ±1%, 5W, ±50ppm/°C) and axial package configuration. The primary difference is packaging format (Bulk for 45F1R5E) and RoHS compliance status (ROHS3 for 45F1R5E versus non-compliant for 45F1R5).

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

A: The Ohmite 45F1R5 and 45F1R5E are identical: 0.343" Dia x 0.937" L (8.70mm x 23.80mm). The Vishay Dale ALSR051R500FE12 has slightly smaller dimensions: 0.312" Dia x 0.875" L (7.92mm x 22.23mm). These dimensional differences may affect board layout and mechanical clearance considerations.

Q: Are there compliance differences between these parts?

A: Yes. The Ohmite 45F1R5 is RoHS non-compliant. Both the Ohmite 45F1R5E and Vishay Dale ALSR051R500FE12 are ROHS3 compliant. All three parts carry EAR99 ECCN classification and the same HTSUS code (8533.21.0080).

Q: Which part should be selected for applications requiring moisture resistance?

A: The Vishay Dale ALSR051R500FE12 explicitly includes moisture-resistant construction and specifies MSL 1 (Unlimited). The Ohmite parts do not list moisture resistance as a feature.

Q: Does the Vishay Dale part's operating temperature range affect substitution suitability?

A: The Vishay Dale ALSR051R500FE12 specifies -65°C to 250°C operating temperature. The Ohmite parts do not provide operating temperature specifications in the available data. For applications requiring defined temperature performance, the Vishay Dale part's specified range provides additional documentation.