Equivalent & Substitute Parts for Ohmite 45F10K

Part Overview

The Ohmite 45F10K is a 10 kOhms ±1% 5W through-hole resistor with axial wirewound construction from the Ohmicone® 40 series. This component is currently active in production with 913 pieces available in new original stock. The part is RoHS non-compliant and classified as REACH Unaffected. Equivalent and substitute parts are identified to provide procurement flexibility, accommodate supply chain variations, and support applications requiring alternative compliance certifications or packaging configurations.

Substiute Parts

45F10K

OhmiteIn Stock: 93445F10K Datasheet

Current PartRFQ

45F10KE

OhmiteIn Stock: 132245F10KE Datasheet

DirectRFQ

ALSR0510K00FE12

Vishay DaleIn Stock: 1388ALSR0510K00FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Ohmite 45F10K is determined by the following critical parameters:

• Resistance value: 10 kOhms (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)
• Number of terminations: 2 (exact match required)

The identified substitute parts meet all mandatory electrical and mechanical parameters. Secondary parameters including temperature coefficient, operating temperature range, physical dimensions, and compliance certifications may vary within acceptable engineering tolerances for this component category.

Parameter Comparison

Engineering Selection Recommendations

45F10KE (Ohmite): This part is a direct equivalent from the same manufacturer with identical electrical specifications and physical dimensions. The primary distinction is packaging configuration (Bulk versus standard) and RoHS3 compliance certification. Selection of 45F10KE is appropriate for applications requiring RoHS compliance or when bulk packaging aligns with procurement requirements.

ALSR0510K00FE12 (Vishay Dale): This substitute meets all core electrical and mechanical requirements with ROHS3 compliance and moisture-resistant construction. Physical dimensions are slightly smaller (0.312" Dia x 0.875" L versus 0.343" Dia x 0.937" L). Temperature coefficient is ±30ppm/°C compared to ±20ppm/°C for the primary part. Operating temperature range is specified as -65°C to 250°C. This part is suitable for applications where moisture resistance and RoHS compliance are required, provided dimensional constraints and temperature coefficient tolerance are acceptable.

Frequently Asked Questions (FAQ)

Q: Can 45F10KE be used as a direct replacement for 45F10K? A: Yes. Both parts share identical resistance (10 kOhms), tolerance (±1%), power rating (5W), composition (wirewound), package type (axial), and physical dimensions. The primary difference is RoHS3 compliance status and packaging configuration. Electrical performance is equivalent.

Q: What are the dimensional differences between 45F10K and ALSR0510K00FE12? A: The 45F10K measures 0.343" Dia x 0.937" L (8.70mm x 23.80mm). The ALSR0510K00FE12 measures 0.312" Dia x 0.875" L (7.92mm x 22.23mm). The substitute is slightly smaller in both diameter and length. Verify that board layout and mechanical clearances accommodate the smaller dimensions before selection.

Q: Does temperature coefficient difference affect substitution? A: The 45F10K and 45F10KE have ±20ppm/°C temperature coefficient. The ALSR0510K00FE12 has ±30ppm/°C. For applications with strict temperature stability requirements, the higher coefficient of the Vishay Dale part may introduce measurable resistance drift. Evaluate circuit performance requirements across the operating temperature range before substitution.

Q: Are all substitute parts RoHS compliant? A: The original 45F10K is RoHS non-compliant. Both substitute parts (45F10KE and ALSR0510K00FE12) are ROHS3 compliant. If RoHS compliance is a design requirement, either substitute is acceptable.

Q: What is the moisture resistance feature on ALSR0510K00FE12? A: The ALSR0510K00FE12 is specified as moisture resistant. The original 45F10K and 45F10KE do not list this feature. For applications exposed to high humidity or condensation environments, the moisture-resistant construction of the Vishay Dale part provides additional protection.

Q: Can these parts be used interchangeably in existing designs? A: Electrical interchangeability is confirmed for all three parts based on resistance, tolerance, power rating, and composition. Mechanical interchangeability requires verification of board layout constraints, particularly for the ALSR0510K00FE12 due to its smaller physical dimensions. Compliance certifications and environmental specifications should be evaluated against design requirements.