Equivalent & Substitute Parts for Ohmite 45F4K5

Part Overview

The Ohmite 45F4K5 is a 4.5 kOhms ±1% 5W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production and maintains 846 pieces in new original stock. The part is classified as RoHS non-compliant. Substitute parts are identified to address packaging variations, compliance requirements, or inventory availability while maintaining identical electrical and mechanical specifications.

Substiute Parts

45F4K5

OhmiteIn Stock: 87945F4K5 Datasheet

Current PartRFQ

45F4K5E

OhmiteIn Stock: 94145F4K5E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 45F4K5 is determined by strict equivalence across the following critical parameters:

• Resistance value: 4.5 kOhms
• Tolerance: ±1%
• Power rating: 5W
• Composition: Wirewound
• Temperature coefficient: ±20ppm/°C
• Package configuration: Axial
• Physical dimensions: 0.343" Dia x 0.937" L (8.70mm x 23.80mm)
• Number of terminations: 2

The identified substitute part 45F4K5E maintains complete electrical and mechanical equivalence to the primary part number. Differences are limited to packaging format and compliance certifications, which do not affect functional performance in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the 45F4K5 and 45F4K5E are active production components from Ohmite's Ohmicone® 40 series. Selection between these parts should be based on the following criteria:

• RoHS Compliance Requirements: The 45F4K5E is ROHS3 compliant, while the primary part 45F4K5 is RoHS non-compliant. Applications subject to RoHS directives or customer specifications requiring RoHS compliance must use the 45F4K5E.

• Packaging and Procurement: The 45F4K5E is supplied in bulk packaging, whereas the 45F4K5 uses standard packaging. Bulk packaging may be preferred for high-volume manufacturing operations.

• Inventory Availability: Both parts maintain adequate stock levels (846 and 870 pieces respectively), supporting immediate procurement without lead time constraints.

• REACH and Trade Compliance: Both parts share identical REACH status (REACH Unaffected) and HTSUS classification (8533.21.0080), confirming equivalent regulatory standing.

Frequently Asked Questions (FAQ)

Q: Can the 45F4K5E be used as a direct replacement for the 45F4K5 in all applications?

A: Yes, the 45F4K5E is electrically and mechanically equivalent to the 45F4K5. Both parts deliver identical resistance, tolerance, power rating, and thermal characteristics. The primary difference is RoHS compliance status. Applications without RoHS requirements can use either part interchangeably.

Q: What is the significance of the RoHS compliance difference between these parts?

A: The 45F4K5E is ROHS3 compliant, while the 45F4K5 is RoHS non-compliant. This distinction is critical for applications subject to RoHS directives, particularly in European markets or for customers with explicit RoHS requirements. For applications without such constraints, both parts are functionally identical.

Q: Does the bulk packaging of the 45F4K5E affect its performance or reliability?

A: No. Packaging format does not influence electrical performance, reliability, or thermal characteristics. Bulk packaging is a procurement and logistics consideration only. The component itself maintains identical specifications regardless of packaging format.

Q: Are there any dimensional or mounting differences between these parts?

A: No. Both parts share identical physical dimensions (0.343" Dia x 0.937" L / 8.70mm x 23.80mm) and axial package configuration. They are mechanically interchangeable in PCB layouts and through-hole applications.

Q: What certifications and compliance standards apply to both parts?

A: Both parts are classified under ECCN EAR99 and HTSUS 8533.21.0080. Both maintain REACH Unaffected status. The 45F4K5E additionally carries ROHS3 compliance certification, while the 45F4K5 does not.