Ohmite 45F225 Equivalent & Substitute Parts

Part Overview

The Ohmite 45F225 is a 225 Ohm ±1% 5W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production with 758 units in stock. The 45F225 is classified as RoHS non-compliant, which may necessitate identification of compliant alternatives for applications subject to RoHS regulations or procurement requirements mandating RoHS3 compliance.

Substiute Parts

45F225

OhmiteIn Stock: 80945F225 Datasheet

Current PartRFQ

45F225E

OhmiteIn Stock: 89345F225E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 45F225 is determined by strict equivalence across the following parameters:

• Resistance value: 225 Ohms
• Tolerance: ±1%
• Power rating: 5W
• Composition: Wirewound
• Package configuration: Axial
• Temperature coefficient: ±20ppm/°C
• Physical dimensions: 0.343" Dia x 0.937" L (8.70mm x 23.80mm)
• Termination count: 2

The 45F225E qualifies as a direct substitute based on identical electrical and mechanical specifications. The primary distinction between these parts is packaging format (bulk versus standard) and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

The 45F225E serves as the direct electrical and mechanical equivalent to the 45F225, with identical performance characteristics across all specified parameters. Selection between these parts should be based on compliance requirements and packaging needs:

• For RoHS3-compliant applications: The 45F225E is the appropriate selection, as it meets ROHS3 compliance requirements while maintaining full electrical and mechanical equivalence.
• For non-compliant applications with standard packaging requirements: The 45F225 remains suitable where RoHS compliance is not mandated.
• For bulk procurement: The 45F225E is available in bulk packaging format with higher inventory availability (810 units versus 758 units).

Both parts maintain active product status and are manufactured by Ohmite within the Ohmicone® 40 series.

Frequently Asked Questions (FAQ)

Q: Are the 45F225 and 45F225E electrically identical?

A: Yes. Both parts share identical resistance (225 Ohms), tolerance (±1%), power rating (5W), temperature coefficient (±20ppm/°C), and wirewound composition. They are direct electrical equivalents.

Q: Can the 45F225E be used as a drop-in replacement for the 45F225?

A: Yes. The 45F225E is mechanically and electrically identical, with the same axial package configuration and physical dimensions (0.343" Dia x 0.937" L). No circuit modifications or board layout changes are required.

Q: What is the primary difference between these parts?

A: The 45F225E is ROHS3 compliant, while the 45F225 is RoHS non-compliant. Additionally, the 45F225E is supplied in bulk packaging format. All electrical and mechanical specifications are identical.

Q: Which part should I select for new designs?

A: Selection depends on regulatory requirements. For applications subject to RoHS regulations or procurement policies requiring RoHS3 compliance, specify the 45F225E. Both parts are active products suitable for new designs.

Q: Are there any performance differences between standard and bulk packaging?

A: No. Packaging format does not affect component performance. The bulk packaging of the 45F225E is a supply and logistics consideration only.