Ohmite 45F350 Equivalent & Substitute Parts

Part Overview

The Ohmite 45F350 is a 350 Ohm ±1% 5W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production with 1075 units in stock. Finding equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and accommodate specific compliance or packaging requirements across different manufacturing environments.

Substiute Parts

45F350

OhmiteIn Stock: 111245F350 Datasheet

Current PartRFQ

45F350E

OhmiteIn Stock: 113645F350E Datasheet

DirectRFQ

ALSR05350R0FE12

Vishay DaleIn Stock: 1141ALSR05350R0FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Ohmite 45F350 is determined by the following critical parameters: resistance value (350 Ohms), tolerance (±1%), power rating (5W), composition (wirewound), and package type (axial). All identified substitute parts meet these core electrical and mechanical requirements, ensuring functional equivalence in circuit applications.

The substitute parts are grouped as follows:

Direct Manufacturer Variants: Parts manufactured by Ohmite with identical electrical specifications but different packaging configurations or compliance certifications.

Cross-Manufacturer Equivalents: Parts from alternative manufacturers (Vishay Dale) that match all critical electrical parameters and physical form factor, enabling interchangeability in standard through-hole applications.

Parameter Comparison

Engineering Selection Recommendations

45F350E (Ohmite): This direct manufacturer variant is electrically and dimensionally identical to the 45F350, with the primary distinction being ROHS3 compliance certification. Selection of this part is appropriate when RoHS compliance is a design or regulatory requirement. Packaging is supplied in bulk format.

ALSR05350R0FE12 (Vishay Dale): This cross-manufacturer equivalent meets all core electrical specifications with identical resistance, tolerance, and power rating. The part features a moisture-resistant construction and ROHS3 compliance. Physical dimensions are slightly smaller (0.312" Dia x 0.875" L versus 0.343" Dia x 0.937" L), which may be advantageous in space-constrained layouts. The temperature coefficient is ±30ppm/°C compared to ±20ppm/°C for the Ohmite variants, and the operating temperature range is specified as -65°C ~ 250°C. This part is suitable for applications requiring enhanced environmental protection and extended temperature operation.

Frequently Asked Questions (FAQ)

Q: Can the 45F350E be used as a direct replacement for the 45F350?

A: Yes. The 45F350E is electrically and mechanically identical to the 45F350, with the same resistance, tolerance, power rating, composition, and physical dimensions. The primary difference is RoHS3 compliance certification on the 45F350E. Both parts are interchangeable in standard through-hole applications.

Q: What are the physical dimension differences between the Ohmite and Vishay Dale parts?

A: The Ohmite 45F350 and 45F350E measure 0.343" Dia x 0.937" L (8.70mm x 23.80mm). The Vishay Dale ALSR05350R0FE12 measures 0.312" Dia x 0.875" L (7.92mm x 22.23mm). The Vishay part is slightly smaller in both diameter and length. PCB layout and mechanical clearance must be verified before substitution.

Q: How do the temperature coefficients compare?

A: The Ohmite 45F350 and 45F350E have a temperature coefficient of ±20ppm/°C. The Vishay Dale ALSR05350R0FE12 has a temperature coefficient of ±30ppm/°C. For applications with strict temperature stability requirements, the Ohmite variants offer superior performance.

Q: Is the Vishay Dale ALSR05350R0FE12 suitable for high-temperature applications?

A: The ALSR05350R0FE12 specifies an operating temperature range of -65°C ~ 250°C, making it suitable for extended temperature environments. The Ohmite variants do not specify an operating temperature range in the provided data.

Q: What is the significance of moisture-resistant construction on the Vishay part?

A: The ALSR05350R0FE12 features moisture-resistant construction, which provides enhanced protection in humid or corrosive environments. This feature is not specified for the Ohmite variants and may be relevant for applications exposed to moisture or salt spray conditions.

Q: Are all three parts RoHS compliant?

A: The Ohmite 45F350 is RoHS non-compliant. The Ohmite 45F350E and Vishay Dale ALSR05350R0FE12 are both ROHS3 compliant. RoHS compliance is required for applications subject to EU Directive 2011/65/EU or equivalent regulations.