Ohmite 45F3K0 Equivalent & Substitute Parts

Part Overview

The Ohmite 45F3K0 is a 3 kOhms ±1% 5W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production with 747 units in stock. The part is RoHS non-compliant, which may necessitate alternative components for applications requiring RoHS3 compliance or enhanced environmental specifications.

Substiute Parts

45F3K0

OhmiteIn Stock: 76845F3K0 Datasheet

Current PartRFQ

45F3K0E

OhmiteIn Stock: 100745F3K0E Datasheet

DirectRFQ

ALSR053K000FE12

Vishay DaleIn Stock: 1047ALSR053K000FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 45F3K0 is determined by the following critical parameters:

• Resistance value: 3 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 5W (exact match required)
• Composition: Wirewound (exact match required)
• Package: Axial (exact match required)
• Number of terminations: 2 (exact match required)

The identified substitute parts meet all core electrical and mechanical parameters. Variations in temperature coefficient, operating temperature range, physical dimensions, and compliance certifications are secondary considerations that may influence selection based on application requirements.

Parameter Comparison

Engineering Selection Recommendations

The 45F3K0E is a direct equivalent from Ohmite with identical electrical specifications and improved RoHS3 compliance status. This part is suitable for applications requiring regulatory compliance upgrades while maintaining the same series characteristics and temperature coefficient performance.

The ALSR053K000FE12 from Vishay Dale meets all core electrical and mechanical substitution criteria. This part offers additional moisture-resistant features and an extended operating temperature range of -65°C to 250°C, compared to the unspecified operating temperature of the main part. The temperature coefficient is ±30ppm/°C, which represents a 50% increase in temperature drift compared to the 45F3K0. Both substitute parts carry ROHS3 compliance certification.

Frequently Asked Questions (FAQ)

Q: Can the 45F3K0E be used as a direct replacement for the 45F3K0?

A: Yes. The 45F3K0E shares identical electrical specifications (3 kOhms, ±1%, 5W, wirewound, axial) and physical dimensions. The primary difference is improved RoHS3 compliance status. Both parts are from the same manufacturer and series.

Q: What is the key difference between the 45F3K0 and ALSR053K000FE12?

A: Both parts meet the core electrical requirements (3 kOhms, ±1%, 5W, wirewound, axial). The ALSR053K000FE12 has a higher temperature coefficient (±30ppm/°C versus ±20ppm/°C), includes moisture-resistant features, and specifies an operating temperature range of -65°C to 250°C. Physical dimensions differ slightly: 0.312" Dia x 0.875" L versus 0.343" Dia x 0.937" L.

Q: Are there packaging differences between these parts?

A: The main part 45F3K0 has unspecified packaging, while both substitute parts are supplied in bulk packaging. Verify packaging requirements for your procurement process.

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

A: Both 45F3K0E and ALSR053K000FE12 carry ROHS3 compliance certification. Selection between them depends on whether moisture resistance and extended temperature range are required for your application.

Q: How do the temperature coefficients compare?

A: The 45F3K0 and 45F3K0E both specify ±20ppm/°C. The ALSR053K000FE12 specifies ±30ppm/°C, indicating greater temperature-dependent resistance variation. For applications with tight temperature stability requirements, the Ohmite parts are preferred.