Ohmite 41F150 150 Ohm 1W Axial Wirewound Resistor Equivalent & Substitute Parts

Part Overview

The Ohmite 41F150 is a 150 Ohm ±1% 1W through-hole axial wirewound resistor from the Ohmicone® 40 series. This component is currently active in production with 897 pieces in stock. The part operates within a temperature coefficient of ±20ppm/°C and is housed in a standard axial package measuring 0.126" diameter by 0.437" length (3.20mm x 11.10mm). Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating, and temperature coefficient) and mechanical compatibility (axial package configuration and physical dimensions).

Substiute Parts

41F150

OhmiteIn Stock: 96941F150 Datasheet

Current PartRFQ

41F150E

OhmiteIn Stock: 80741F150E Datasheet

DirectRFQ

ALSR01150R0FE12

Vishay DaleIn Stock: 1085ALSR01150R0FE12 Datasheet

DirectRFQ

RS01A150R0FS70

Vishay DaleIn Stock: 2062RS01A150R0FS70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 41F150 are qualified based on the following criteria:

Electrical Compatibility: All substitute parts must provide 150 Ohms resistance with ±1% tolerance and 1W power rating. Temperature coefficient values within ±20ppm/°C to ±30ppm/°C are acceptable for general circuit applications where the main part's ±20ppm/°C specification is not a critical design constraint.

Mechanical Compatibility: All substitutes must use axial through-hole package configuration with two terminations. Physical dimensions must be compatible with standard PCB layouts designed for axial resistors.

Composition: Wirewound construction is maintained across all substitutes to preserve thermal and frequency response characteristics.

The following substitute parts meet these criteria:

1. 41F150E (Ohmite) – Direct manufacturer variant with enhanced RoHS compliance and extended operating temperature range
2. ALSR01150R0FE12 (Vishay Dale) – Moisture-resistant wirewound with ROHS3 compliance
3. RS01A150R0FS70 (Vishay Dale) – Moisture-resistant wirewound with ±20ppm/°C temperature coefficient matching the main part

Parameter Comparison

Engineering Selection Recommendations

41F150E (Ohmite): This is the direct manufacturer equivalent with identical electrical specifications and physical dimensions. The 41F150E offers improved RoHS compliance and an extended operating temperature range (-55°C to 275°C) compared to the main part. Selection of this variant is appropriate for applications requiring regulatory compliance or operation at elevated temperatures.

ALSR01150R0FE12 (Vishay Dale): This substitute provides ROHS3 compliance and moisture-resistant construction. The temperature coefficient is ±30ppm/°C, which is acceptable for general applications but represents a 50% increase from the main part's ±20ppm/°C specification. Physical dimensions are slightly smaller (0.110" diameter). This part is suitable for moisture-prone environments and applications with relaxed temperature coefficient requirements.

RS01A150R0FS70 (Vishay Dale): This substitute maintains the ±20ppm/°C temperature coefficient of the main part and includes moisture-resistant features. Physical dimensions are the smallest of the group (0.094" diameter). The part is non-compliant with current RoHS standards. This option is recommended when temperature coefficient precision matches the original specification and moisture resistance is required.

Frequently Asked Questions (FAQ)

Q: Can I use 41F150E as a direct replacement for 41F150?

A: Yes. The 41F150E is a direct manufacturer equivalent with identical electrical specifications (150 Ohms ±1%, 1W, ±20ppm/°C) and physical dimensions (0.126" Dia x 0.437" L). The primary difference is improved RoHS compliance and extended operating temperature range.

Q: What is the difference between the Ohmite and Vishay Dale substitutes?

A: Ohmite 41F150E maintains exact electrical and physical specifications. Vishay Dale ALSR01150R0FE12 and RS01A150R0FS70 both offer moisture-resistant construction. ALSR01150R0FE12 has a ±30ppm/°C temperature coefficient and smaller physical dimensions. RS01A150R0FS70 maintains the ±20ppm/°C temperature coefficient but is also physically smaller.

Q: Are the smaller physical dimensions of Vishay Dale parts compatible with my PCB layout?

A: Axial resistors with smaller diameters and lengths are mechanically compatible with standard through-hole PCB layouts designed for axial components. However, verify that your specific PCB footprint accommodates the reduced dimensions: ALSR01150R0FE12 (0.110" Dia x 0.406" L) and RS01A150R0FS70 (0.094" Dia x 0.406" L) versus the original 41F150 (0.126" Dia x 0.437" L).

Q: Which substitute should I select for RoHS-compliant applications?

A: For RoHS compliance, select either 41F150E (RoHS Compliant) or ALSR01150R0FE12 (ROHS3 Compliant). Both meet current regulatory requirements. RS01A150R0FS70 is RoHS non-compliant.

Q: Does temperature coefficient affect my circuit performance?

A: Temperature coefficient determines resistance value drift with temperature changes. The main part and RS01A150R0FS70 both specify ±20ppm/°C. ALSR01150R0FE12 specifies ±30ppm/°C, resulting in greater resistance variation across temperature extremes. Select based on your circuit's temperature stability requirements.

Q: What is the advantage of moisture-resistant construction?

A: Moisture-resistant wirewound resistors (ALSR01150R0FE12 and RS01A150R0FS70) are designed for applications exposed to humidity or condensation. The main part 41F150 does not specify moisture resistance features.