Equivalent & Substitute Parts for Ohmite 41F250

Part Overview

The Ohmite 41F250 is a 250 Ohm ±1% 1W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is classified as Active product status with 1105 units currently in stock. Finding equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and accommodate specific compliance or environmental requirements across different manufacturing batches and supplier sources.

Substiute Parts

41F250

OhmiteIn Stock: 115941F250 Datasheet

Current PartRFQ

41F250E

OhmiteIn Stock: 93141F250E Datasheet

Parametric EquivalentRFQ

ALSR01250R0FE12

Vishay DaleIn Stock: 832ALSR01250R0FE12 Datasheet

DirectRFQ

41F250E

OhmiteIn Stock: 93141F250E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 41F250 are qualified based on the following critical parameters that determine functional equivalence:

• Resistance Value: 250 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power Rating: 1W (exact match required)
• Composition: Wirewound (exact match required)
• Package Type: Axial (exact match required)
• Termination Count: 2 (exact match required)

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in temperature coefficient, physical dimensions, RoHS compliance status, and moisture resistance features are secondary parameters that may differ between substitutes while maintaining functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

41F250E (Ohmite): This parametric equivalent maintains identical electrical specifications and physical dimensions to the primary 41F250 part. The 41F250E offers improved RoHS compliance status (RoHS Compliant versus RoHS non-compliant) and defined moisture sensitivity level (MSL 1 - Unlimited), making it suitable for applications requiring regulatory compliance documentation. Temperature coefficient remains at ±20ppm/°C.

ALSR01250R0FE12 (Vishay Dale): This direct manufacturer substitute provides equivalent electrical performance with ROHS3 compliance and moisture-resistant construction. Physical dimensions are slightly smaller (0.110" Dia x 0.406" L versus 0.126" Dia x 0.437" L), which may be advantageous in space-constrained layouts. Temperature coefficient is ±30ppm/°C, representing a 50% increase in temperature drift. Operating temperature range is specified as -65°C ~ 250°C. This part is suitable for applications where moisture resistance and enhanced RoHS compliance are required.

Selection between substitutes should be based on compliance requirements, available inventory, and specific environmental operating conditions of the target application.

Frequently Asked Questions (FAQ)

Q: Can the 41F250E be used as a direct replacement for the 41F250?

A: Yes. The 41F250E maintains identical resistance (250 Ohms), tolerance (±1%), power rating (1W), composition (wirewound), package type (axial), and physical dimensions. The primary difference is improved RoHS compliance status and defined moisture sensitivity level.

Q: What is the key difference between the Ohmite 41F250E and the Vishay Dale ALSR01250R0FE12?

A: Both parts meet the core electrical specifications (250 Ohms ±1% 1W wirewound axial). The ALSR01250R0FE12 features moisture-resistant construction, ROHS3 compliance, and a specified operating temperature range (-65°C ~ 250°C). Physical dimensions are smaller, and temperature coefficient is ±30ppm/°C compared to ±20ppm/°C for the Ohmite parts.

Q: Are there any physical dimension constraints when substituting with the ALSR01250R0FE12?

A: The ALSR01250R0FE12 has smaller physical dimensions (0.110" Dia x 0.406" L) compared to the 41F250 and 41F250E (0.126" Dia x 0.437" L). Verify that the smaller package fits within your PCB layout and mechanical constraints before substitution.

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

A: Both the 41F250E (RoHS Compliant) and ALSR01250R0FE12 (ROHS3 Compliant) meet RoHS compliance requirements. The ALSR01250R0FE12 offers enhanced ROHS3 compliance status if required by your application specifications.

Q: Does temperature coefficient affect part selection?

A: Temperature coefficient differences (±20ppm/°C for Ohmite parts versus ±30ppm/°C for Vishay Dale) should be evaluated based on your circuit's temperature stability requirements. The Ohmite parts offer tighter temperature performance, while the Vishay Dale part provides moisture resistance as a trade-off.