Ohmite 45F220E Equivalent & Substitute Parts

Part Overview

The Ohmite 45F220E is a 220 Ohm ±1% 5W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is designed for applications requiring precision resistance with high power dissipation capability. The part maintains Active product status with 958 units in current inventory. Equivalent and substitute parts are identified when component availability is constrained, supply chain disruptions occur, or design flexibility permits alternative sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

45F220E

OhmiteIn Stock: 102945F220E Datasheet

Current PartRFQ

UB5C-220RF1

RiedonIn Stock: 6635UB5C-220RF1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 45F220E is determined by strict equivalence across the following critical parameters:

• Resistance value: 220 Ohms (exact match required)
• Tolerance: ±1% (precision class equivalence)
• Power rating: 5W (thermal capability match)
• Composition: Wirewound (construction type equivalence)
• Package: Axial (form factor and termination compatibility)
• Temperature coefficient: ±20ppm/°C (stability class equivalence)
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected, EAR99 classification

The Riedon UB5C-220RF1 meets all mandatory electrical parameters and regulatory requirements, qualifying as a direct substitute. Enhanced features (current sense capability, flame proof, moisture resistant, pulse withstanding, safety rating) represent functional additions that do not compromise baseline compatibility.

Parameter Comparison

Engineering Selection Recommendations

The Riedon UB5C-220RF1 qualifies as a direct electrical and mechanical substitute for the Ohmite 45F220E based on matched core specifications: 220 Ohm resistance, ±1% tolerance, 5W power rating, wirewound construction, and axial package configuration. Both components maintain ROHS3 compliance and REACH Unaffected status with identical EAR99 export classification.

The UB5C-220RF1 provides additional functional capabilities including current sense functionality, flame proof construction, moisture resistance, pulse withstanding performance, and safety rating certification. These enhancements do not alter baseline electrical performance and expand application suitability.

Physical dimensions differ between the two parts: the 45F220E measures 0.343" diameter by 0.937" length, while the UB5C-220RF1 measures 0.250" diameter by 0.500" length. The substitute component's smaller form factor accommodates space-constrained layouts. Both axial packages utilize identical two-pin termination and are compatible with standard through-hole PCB mounting.

The UB5C-220RF1 specifies an operating temperature range of -55°C to 250°C, providing defined thermal performance boundaries. Selection between these components depends on application-specific requirements for physical envelope, thermal operating range, and enhanced feature utilization.

Frequently Asked Questions (FAQ)

Q: Can the Riedon UB5C-220RF1 replace the Ohmite 45F220E in existing designs?

A: Yes. Both components share identical electrical specifications (220 Ohms, ±1% tolerance, 5W power rating, ±20ppm/°C temperature coefficient) and axial package configuration with two-pin termination. The primary design consideration is physical size: the UB5C-220RF1 is smaller (0.250" Dia x 0.500" L versus 0.343" Dia x 0.937" L), which may require PCB layout verification in space-constrained applications.

Q: Are there regulatory or compliance differences between these parts?

A: No. Both components are ROHS3 Compliant, REACH Unaffected, and classified as EAR99 for export purposes. Compliance status is equivalent across all regulatory frameworks.

Q: What is the significance of the UB5C-220RF1's additional features?

A: The substitute component includes current sense capability, flame proof construction, moisture resistance, pulse withstanding performance, and safety rating certification. These features extend application flexibility without compromising baseline electrical performance or compatibility with the original 45F220E specification.

Q: How do the operating temperature ranges compare?

A: The Ohmite 45F220E does not specify an operating temperature range in the provided data. The Riedon UB5C-220RF1 specifies -55°C to 250°C operation. Applications requiring defined thermal performance boundaries should reference the UB5C-220RF1 specification.

Q: Are both components suitable for through-hole PCB assembly?

A: Yes. Both components utilize axial wirewound construction with two-pin termination, compatible with standard through-hole soldering processes and PCB mounting techniques.

Q: What inventory considerations apply to these parts?

A: The Ohmite 45F220E maintains 958 units in current stock. The Riedon UB5C-220RF1 maintains 6540 units in current stock, providing enhanced supply availability for this electrical specification.