Ohmite 81F150 Equivalent & Substitute Parts

Part Overview

The Ohmite 81F150 is a 150 Ohm ±1% 1W through-hole resistor with axial wirewound construction from the Acrasil® 80 series. This component is actively manufactured and maintains 890 pieces in current inventory. The part operates across industrial temperature ranges and is suitable for applications requiring precision resistive elements in axial package configurations. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part becomes unavailable or when alternative specifications better suit application requirements.

Substiute Parts

81F150

OhmiteIn Stock: 93281F150 Datasheet

Current PartRFQ

RS01A150R0FS70

Vishay DaleIn Stock: 2062RS01A150R0FS70 Datasheet

MFR RecommendedRFQ

41F150E

OhmiteIn Stock: 80741F150E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Ohmite 81F150 are qualified based on the following critical parameters that must remain constant across all equivalent selections:

• Resistance value: 150 Ohms
• Tolerance: ±1%
• Power rating: 1W
• Composition: Wirewound
• Package configuration: Axial through-hole
• Temperature coefficient: ±20ppm/°C
• Termination count: 2

Two substitute parts meet these electrical and mechanical criteria:

RS01A150R0FS70 (Vishay Dale) — Manufacturer-recommended substitute with identical electrical specifications, moisture-resistant construction, and active product status. Packaged in cut tape format with 2003 units in inventory.

41F150E (Ohmite) — Parametric equivalent from the same manufacturer (Ohmite Ohmicone® 40 series) with identical electrical specifications and RoHS compliance. Packaged in box format with 790 units in inventory.

Parameter Comparison

Engineering Selection Recommendations

For RoHS-compliant applications: Select the 41F150E (Ohmite Ohmicone® 40 series). This part maintains identical electrical specifications while meeting RoHS compliance requirements. Operating temperature range extends to 275°C, providing additional thermal margin for high-temperature environments.

For moisture-resistant applications: Select the RS01A150R0FS70 (Vishay Dale RS series). This part incorporates moisture-resistant construction and offers the widest operating temperature range (-65°C to 250°C). Higher inventory availability (2003 units) supports extended procurement cycles.

For same-manufacturer continuity: Select the 41F150E (Ohmite). Both parts originate from Ohmite, simplifying supply chain management and qualification documentation. The 41F150E provides RoHS compliance as an additional benefit.

For dimensional compatibility in space-constrained layouts: Note that RS01A150R0FS70 has reduced physical dimensions (0.094" diameter vs. 0.126" diameter). Verify PCB footprint and mechanical clearances before selection if board space is limited.

Frequently Asked Questions (FAQ)

Q: Can RS01A150R0FS70 be used as a direct drop-in replacement for 81F150?

A: Yes, from an electrical standpoint. Both parts share identical resistance (150 Ohms), tolerance (±1%), power rating (1W), temperature coefficient (±20ppm/°C), and axial package configuration. However, RS01A150R0FS70 has a smaller physical diameter (0.094" vs. 0.126"), which may affect PCB footprint compatibility. Verify mechanical fit before implementation.

Q: What is the difference between 41F150E and 81F150?

A: Both are Ohmite wirewound axial resistors with identical electrical specifications (150 Ohms, ±1%, 1W, ±20ppm/°C). The primary difference is RoHS compliance: 41F150E is RoHS compliant while 81F150 is non-compliant. The 41F150E also offers a higher maximum operating temperature (275°C vs. unspecified for 81F150). Both maintain the same physical dimensions (0.126" Dia x 0.437" L).

Q: Which substitute part has the best inventory availability?

A: RS01A150R0FS70 (Vishay Dale) has the highest inventory with 2003 units in stock, compared to 890 units for 81F150 and 790 units for 41F150E.

Q: Are all three parts suitable for high-temperature applications?

A: The 41F150E supports the highest operating temperature range (-55°C to 275°C). The RS01A150R0FS70 operates from -65°C to 250°C. Operating temperature range for the original 81F150 is not specified in available documentation.

Q: What packaging formats are available?

A: 81F150 is supplied in standard packaging (format not specified). RS01A150R0FS70 is packaged in cut tape (CT) format. 41F150E is packaged in box format. Select based on your assembly process requirements and inventory management procedures.