Ohmite 41F800 Equivalent & Substitute Parts

Part Overview

The Ohmite 41F800 is an 800 Ohm ±1% 1W through-hole axial wirewound resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision resistance with moderate power dissipation in a compact axial package. The part maintains active product status with 763 units currently in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to supply constraints, design flexibility, or application-specific requirements.

Substiute Parts

41F800

OhmiteIn Stock: 83041F800 Datasheet

Current PartRFQ

ALSR01800R0FE12

Vishay DaleIn Stock: 1140ALSR01800R0FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The Vishay Dale ALSR01800R0FE12 qualifies as a direct substitute for the Ohmite 41F800 based on the following critical parameters:

• Resistance Value: Both parts specify 800 Ohms
• Tolerance: Both maintain ±1% tolerance
• Power Rating: Both are rated for 1W dissipation
• Composition: Both utilize wirewound construction
• Package Configuration: Both employ axial through-hole termination with 2 leads
• Electrical Performance: Both meet the precision requirements for equivalent circuit operation

The ALSR01800R0FE12 introduces moisture-resistant construction and operates across an extended temperature range (-65°C to 250°C), providing enhanced environmental protection compared to the base Ohmicone® 40 specification.

Parameter Comparison

Engineering Selection Recommendations

Ohmite 41F800: Select this part for applications where the original design specification and Ohmicone® 40 series characteristics are required. The part is active and maintains adequate inventory levels.

Vishay Dale ALSR01800R0FE12: This substitute is suitable for designs requiring RoHS3 compliance, moisture-resistant construction, or extended operating temperature range. The ALSR series provides equivalent electrical performance with enhanced environmental specifications. The slightly smaller physical dimensions may offer layout advantages in space-constrained applications. This part is available in higher inventory quantities (1077 units).

Both parts share identical electrical specifications (800 Ohms, ±1%, 1W, wirewound, axial configuration) and are functionally interchangeable in standard circuit applications where the specified tolerance and power rating are required.

Frequently Asked Questions (FAQ)

Q: Are the Ohmite 41F800 and Vishay Dale ALSR01800R0FE12 electrically equivalent?

A: Yes. Both parts specify 800 Ohms resistance with ±1% tolerance and 1W power rating. The wirewound construction and axial package configuration are identical. The primary difference is the temperature coefficient (±20ppm/°C vs. ±30ppm/°C), which remains within acceptable tolerance for most general-purpose applications.

Q: What are the physical dimension differences?

A: The Ohmite 41F800 measures 0.126" diameter × 0.437" length (3.20mm × 11.10mm). The Vishay Dale ALSR01800R0FE12 measures 0.110" diameter × 0.406" length (2.79mm × 10.31mm). The substitute is slightly smaller in both dimensions, which may affect board layout and mechanical clearance considerations.

Q: Can I use the ALSR01800R0FE12 as a direct replacement in existing designs?

A: The ALSR01800R0FE12 is electrically and mechanically compatible for axial through-hole mounting. Verify that the slightly smaller physical dimensions do not conflict with existing PCB layout, component spacing, or mechanical constraints. Both parts use standard axial lead termination.

Q: What compliance advantages does the ALSR01800R0FE12 offer?

A: The Vishay Dale ALSR01800R0FE12 is ROHS3 compliant, whereas the Ohmite 41F800 is RoHS non-compliant. The ALSR series also features moisture-resistant construction (MSL 1) and operates across an extended temperature range (-65°C to 250°C), providing enhanced environmental protection for demanding applications.

Q: Which part should I specify for new designs?

A: For new designs, the Vishay Dale ALSR01800R0FE12 is recommended due to RoHS3 compliance and enhanced environmental specifications. For legacy system maintenance or designs with specific Ohmicone® 40 series requirements, the Ohmite 41F800 remains the primary choice.