Equivalent & Substitute Parts for Ohmite 41F1K8

Part Overview

The Ohmite 41F1K8 is a 1.8 kOhms ±1% 1W through-hole resistor with axial wirewound construction from the Ohmicone® 40 series. This component is currently active in production with 1116 pieces in stock. Alternative equivalent parts may be required due to packaging preferences, compliance requirements, or supply chain considerations.

Substiute Parts

41F1K8

OhmiteIn Stock: 122441F1K8 Datasheet

Current PartRFQ

41F1K8E

OhmiteIn Stock: 129541F1K8E Datasheet

DirectRFQ

ALSR011K800FE12

Vishay DaleIn Stock: 966ALSR011K800FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 41F1K8 is determined by matching the following core electrical and mechanical parameters:

• Resistance value: 1.8 kOhms
• Tolerance: ±1%
• Power rating: 1W
• Composition: Wirewound
• Package: Axial through-hole
• Termination count: 2

The identified substitute parts meet these criteria. Variations in temperature coefficient, physical dimensions, and compliance certifications do not prevent functional substitution but may influence selection based on application requirements and regulatory constraints.

Parameter Comparison

Engineering Selection Recommendations

All three parts are active products with identical electrical specifications (1.8 kOhms, ±1%, 1W, wirewound, axial). Selection should be based on the following factors:

41F1K8E (Ohmite): Direct manufacturer variant with identical temperature coefficient (±20ppm/°C) and same series designation. Offers ROHS3 compliance and bulk packaging. Recommended for applications requiring RoHS compliance and consistent thermal performance with the original specification.

ALSR011K800FE12 (Vishay Dale): Cross-manufacturer substitute with slightly higher temperature coefficient (±30ppm/°C) and moisture-resistant construction. Provides ROHS3 compliance and extended operating temperature range (-65°C to 250°C). Recommended for applications requiring moisture resistance or wider temperature operation, provided the ±30ppm/°C coefficient is acceptable.

Frequently Asked Questions (FAQ)

Q: Can 41F1K8E be used as a direct replacement for 41F1K8?

A: Yes. Both parts share identical electrical specifications, temperature coefficient, and series designation. The primary difference is packaging (bulk versus standard) and RoHS compliance status.

Q: What is the key difference between 41F1K8 and ALSR011K800FE12?

A: Both meet the core electrical requirements (1.8 kOhms, ±1%, 1W, wirewound, axial). The ALSR011K800FE12 has a higher temperature coefficient (±30ppm/°C versus ±20ppm/°C), includes moisture-resistant construction, and supports a wider operating temperature range (-65°C to 250°C). Physical dimensions also differ slightly.

Q: Are there packaging differences between these parts?

A: 41F1K8 is supplied in standard packaging, while 41F1K8E and ALSR011K800FE12 are supplied in bulk packaging. This affects procurement and handling but not electrical performance.

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

A: Both 41F1K8E and ALSR011K800FE12 are ROHS3 compliant. The original 41F1K8 is RoHS non-compliant.

Q: Does the temperature coefficient difference affect substitution?

A: The ±30ppm/°C coefficient of ALSR011K800FE12 versus ±20ppm/°C for 41F1K8 and 41F1K8E represents a measurable difference. Substitution is valid only if the application tolerates this variance.