43F30R Equivalent & Substitute Parts

Part Overview

The Ohmite 43F30R is a 30 Ohm, 1% tolerance, 3W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is currently active in production with 1088 units in stock. Equivalent and substitute parts are necessary to support design flexibility, manage supply chain continuity, and accommodate varying packaging or compliance requirements across manufacturing environments.

Substiute Parts

43F30R

OhmiteIn Stock: 111643F30R Datasheet

Current PartRFQ

43F30RE

OhmiteIn Stock: 109143F30RE Datasheet

DirectRFQ

ALSR0330R00FE12

Vishay DaleIn Stock: 1613ALSR0330R00FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 43F30R is determined by matching the following core electrical and mechanical parameters:

• Resistance value: 30 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package: Axial through-hole
• Terminations: 2-pin

All substitute parts listed meet these criteria. Variations in temperature coefficient, physical dimensions, moisture resistance features, and RoHS compliance status are secondary parameters that may influence selection based on application requirements but do not disqualify substitution eligibility.

Parameter Comparison

Engineering Selection Recommendations

The 43F30R, 43F30RE, and ALSR0330R00FE12 are electrically and mechanically interchangeable for applications requiring a 30 Ohm, 1% tolerance, 3W axial wirewound resistor.

The 43F30RE is an Ohmite variant with identical electrical specifications and physical dimensions to the 43F30R but carries ROHS3 compliance certification, making it suitable for applications subject to RoHS requirements.

The ALSR0330R00FE12 from Vishay Dale meets all core electrical specifications and is ROHS3 compliant. This part features a smaller physical footprint (0.180" Dia x 0.500" L versus 0.220" Dia x 0.594" L) and includes moisture-resistant construction. The temperature coefficient is ±30ppm/°C compared to ±20ppm/°C for the Ohmite variants. Selection of this part should account for PCB layout constraints and thermal stability requirements specific to the application.

Frequently Asked Questions (FAQ)

Q: Can the 43F30RE be used as a direct replacement for the 43F30R?

A: Yes. Both parts are manufactured by Ohmite, share identical electrical specifications (30 Ohms, ±1%, 3W), and have the same physical dimensions. The primary difference is RoHS compliance status. The 43F30RE is ROHS3 compliant while the 43F30R is not.

Q: Is the ALSR0330R00FE12 a suitable substitute despite its smaller physical size?

A: The ALSR0330R00FE12 meets all core electrical requirements and is mechanically compatible with standard axial through-hole PCB layouts. However, its smaller diameter (0.180" versus 0.220") and length (0.500" versus 0.594") must be verified against PCB design constraints and thermal dissipation requirements for the specific application.

Q: What is the significance of the temperature coefficient difference between the Ohmite and Vishay Dale parts?

A: The 43F30R and 43F30RE have a temperature coefficient of ±20ppm/°C, while the ALSR0330R00FE12 has ±30ppm/°C. This parameter defines the resistance change per degree Celsius. Applications requiring tighter temperature stability should prioritize the Ohmite variants with the lower coefficient.

Q: Are all three parts suitable for RoHS-compliant designs?

A: The 43F30RE and ALSR0330R00FE12 are both ROHS3 compliant. The 43F30R is RoHS non-compliant and should not be used in designs requiring RoHS certification.

Q: What is the moisture resistance feature on the ALSR0330R00FE12?

A: The ALSR0330R00FE12 includes moisture-resistant construction as a design feature. This provides enhanced protection in humid or corrosive environments compared to the standard Ohmite variants.