Equivalent & Substitute Parts for 41F2K5

Part Overview

The 41F2K5 is a 2.5 kOhms ±1% 1W axial wirewound through-hole resistor manufactured by Ohmite, part of the Ohmicone® 40 series. This component is designed for applications requiring precision resistive elements with wirewound construction and tight tolerance specifications. The part is currently active in production with 1105 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to component availability, supply chain considerations, or specific application requirements.

Substiute Parts

41F2K5

OhmiteIn Stock: 119341F2K5 Datasheet

Current PartRFQ

41F2K5E

OhmiteIn Stock: 116441F2K5E Datasheet

DirectRFQ

ALSR012K500FE12

Vishay DaleIn Stock: 846ALSR012K500FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 41F2K5 are qualified based on the following critical parameters:

• Electrical Match: Resistance value of 2.5 kOhms with ±1% tolerance
• Power Rating: 1W minimum capacity
• Package Configuration: Axial through-hole form factor
• Composition: Wirewound construction
• Termination Count: 2-pin axial leads

The identified substitutes maintain these core electrical and mechanical specifications, ensuring functional equivalence in circuit applications. Variations in temperature coefficient, operating temperature range, and compliance certifications are noted but do not affect basic substitutability for standard applications.

Parameter Comparison

Engineering Selection Recommendations

41F2K5E (Ohmite): This substitute maintains identical electrical specifications and is manufactured by the same supplier as the primary part. Both units are RoHS non-compliant and share the same HTSUS classification. Selection of this part is appropriate for direct replacement in existing designs without modification.

ALSR012K500FE12 (Vishay Dale): This substitute meets all core electrical and mechanical requirements with equivalent resistance, tolerance, power rating, and axial package configuration. The ALSR series offers ROHS3 compliance, making it suitable for applications with RoHS requirements. The temperature coefficient of ±30ppm/°C is slightly higher than the primary part but remains within acceptable ranges for general-purpose applications. Physical dimensions are comparable (0.110" Dia x 0.406" L versus 0.126" Dia x 0.437" L), with minor variations that do not affect standard PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can 41F2K5E be used as a direct replacement for 41F2K5?

A: Yes. Both parts are manufactured by Ohmite with identical electrical specifications (2.5 kOhms ±1%, 1W, wirewound, axial). The primary difference is packaging designation (Bulk for 41F2K5E). No circuit modifications are required.

Q: What is the key difference between 41F2K5 and ALSR012K500FE12?

A: The ALSR012K500FE12 is manufactured by Vishay Dale and offers ROHS3 compliance, whereas the 41F2K5 is RoHS non-compliant. Electrical performance is equivalent. The temperature coefficient is ±30ppm/°C (versus ±20ppm/°C), and the operating temperature range is specified as -65°C to 250°C. Physical dimensions are slightly smaller.

Q: Are there any PCB layout considerations when substituting these parts?

A: The axial package dimensions differ slightly between manufacturers. The 41F2K5 measures 0.126" Dia x 0.437" L, while the ALSR012K500FE12 measures 0.110" Dia x 0.406" L. These variations are minor and typically do not require PCB redesign for standard through-hole layouts. Verify hole spacing and clearances for your specific application.

Q: Which substitute should I select for new designs?

A: Selection depends on compliance requirements. For RoHS-compliant designs, use ALSR012K500FE12. For designs without RoHS constraints, either 41F2K5E or ALSR012K500FE12 are suitable based on availability and supplier preference.

Q: Are all three parts functionally equivalent in circuit operation?

A: Yes. All three parts provide 2.5 kOhms ±1% resistance at 1W power rating in axial wirewound configuration. Differences in temperature coefficient and compliance certifications do not affect basic functional equivalence for standard resistive applications.