Ohmite 45F330 Equivalent & Substitute Parts

Part Overview

The Ohmite 45F330 is a 330 Ohms ±1% 5W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is classified as Active product status and is currently in stock with 936 units available. The need for equivalent and substitute parts arises from supply chain considerations, regional availability, packaging preferences, and compliance requirements across different manufacturing environments.

Substiute Parts

45F330

OhmiteIn Stock: 94845F330 Datasheet

Current PartRFQ

ALSR05330R0FE12

Vishay DaleIn Stock: 1271ALSR05330R0FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Ohmite 45F330 is determined by the following critical parameters:

• Resistance Value: Must be 330 Ohms
• Tolerance: Must be ±1% or tighter
• Power Rating: Must be 5W or greater
• Package Type: Must be Axial configuration
• Composition: Must be Wirewound
• Termination Count: Must be 2 terminations

The Vishay Dale ALSR05330R0FE12 meets all substitution criteria. Both components share identical resistance, tolerance, power rating, composition, and package configuration. Dimensional variations and temperature coefficient differences remain within acceptable engineering parameters for direct substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the Ohmite 45F330 and Vishay Dale ALSR05330R0FE12 are Active status components suitable for direct substitution based on electrical and mechanical parameters. The Vishay Dale ALSR05330R0FE12 offers ROHS3 compliance, which may be required for applications subject to RoHS regulations. The Ohmite 45F330 remains the original specification component. Selection between these parts should be based on compliance requirements, supply availability, and packaging preferences specific to your manufacturing environment.

Frequently Asked Questions (FAQ)

Q: Can the Vishay Dale ALSR05330R0FE12 directly replace the Ohmite 45F330?

A: Yes. Both components share identical resistance (330 Ohms), tolerance (±1%), power rating (5W), composition (Wirewound), and axial package configuration. The components are electrically and mechanically compatible for direct substitution.

Q: What are the dimensional differences between these parts?

A: The Ohmite 45F330 measures 0.343" Dia x 0.937" L (8.70mm x 23.80mm), while the Vishay Dale ALSR05330R0FE12 measures 0.312" Dia x 0.875" L (7.92mm x 22.23mm). The Vishay Dale component is slightly smaller in both diameter and length. Verify PCB layout clearances if space constraints are critical.

Q: What is the difference in temperature coefficient?

A: The Ohmite 45F330 has a temperature coefficient of ±20ppm/°C, while the Vishay Dale ALSR05330R0FE12 has ±30ppm/°C. This difference is within acceptable tolerances for most applications. The Vishay Dale component also specifies an operating temperature range of -65°C ~ 250°C.

Q: Does RoHS compliance affect substitution eligibility?

A: RoHS compliance is a regulatory and supply chain consideration, not an electrical substitution criterion. The Vishay Dale ALSR05330R0FE12 is ROHS3 compliant, while the Ohmite 45F330 is RoHS non-compliant. Select based on your application's regulatory requirements.

Q: Are there any moisture sensitivity considerations?

A: The Vishay Dale ALSR05330R0FE12 features moisture-resistant construction with MSL rating 1 (Unlimited). The Ohmite 45F330 lists MSL as Not Applicable. For applications in high-humidity environments, the Vishay Dale component offers additional protection.