Equivalent & Substitute Parts for Ohmite 40F1K0

Part Overview

The Ohmite 40F1K0 is a 1 kOhms ±1% 10W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is currently active in production with 838 pieces in stock. Substitute parts are identified to provide alternative sourcing options when the primary part number is unavailable or when specific packaging or compliance requirements necessitate component alternatives.

Substiute Parts

40F1K0

OhmiteIn Stock: 92140F1K0 Datasheet

Current PartRFQ

80F1K0

OhmiteIn Stock: 103080F1K0 Datasheet

MFR RecommendedRFQ

40F1K0E

OhmiteIn Stock: 87340F1K0E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 40F1K0 are qualified based on matching the following critical electrical and mechanical parameters:

• Resistance value: 1 kOhms
• Tolerance: ±1%
• Power rating: 10W
• Composition: Wirewound
• Package: Axial
• Temperature coefficient: ±20ppm/°C
• Termination count: 2

Two substitute relationships are identified:

MFR Recommended Substitute: The 80F1K0 from the Acrasil® 80 series matches all critical electrical parameters and axial package specifications. Physical dimensions differ slightly (0.406" Dia x 1.843" L versus 0.406" Dia x 1.902" L), remaining within acceptable tolerance for through-hole axial component mounting.

Parametric Equivalent: The 40F1K0E maintains identical electrical specifications and physical dimensions to the primary part, differing only in packaging format (Bulk versus standard) and RoHS compliance status (ROHS3 Compliant versus RoHS non-compliant).

Parameter Comparison

Engineering Selection Recommendations

Primary Part (40F1K0): Use when standard packaging and existing RoHS non-compliant specifications are acceptable. Current inventory of 838 pieces supports immediate availability.

MFR Recommended Substitute (80F1K0): Select when the Acrasil® 80 series is preferred or when the primary part is unavailable. The 1.843" length is 0.059" shorter than the primary part; verify PCB layout clearance before substitution. Highest inventory availability at 1020 pieces. Maintains RoHS non-compliant status matching the primary part.

Parametric Equivalent (40F1K0E): Select when ROHS3 compliance is required. Identical electrical and physical specifications to the primary part with bulk packaging. Use when regulatory requirements mandate RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the 80F1K0 be used as a direct replacement for the 40F1K0?

A: The 80F1K0 matches all critical electrical parameters (1 kOhms, ±1%, 10W, ±20ppm/°C) and axial package type. The physical length differs by 0.059" (1.843" versus 1.902"). Verify PCB layout and mounting clearance before substitution.

Q: What is the difference between the 40F1K0 and 40F1K0E?

A: Both parts are electrically and physically identical. The primary difference is packaging format (standard versus bulk) and RoHS compliance status. The 40F1K0E is ROHS3 compliant, while the 40F1K0 is RoHS non-compliant. Select 40F1K0E when regulatory compliance is required.

Q: Are all substitute parts from Ohmite?

A: Yes. All three part numbers (40F1K0, 80F1K0, and 40F1K0E) are manufactured by Ohmite, ensuring consistent quality and performance standards.

Q: What parameters must match for substitution?

A: Critical matching parameters are resistance (1 kOhms), tolerance (±1%), power rating (10W), composition (wirewound), package type (axial), and temperature coefficient (±20ppm/°C). Physical dimensions should be verified for PCB compatibility.

Q: Which substitute has the best availability?

A: The 80F1K0 has the highest inventory at 1020 pieces, followed by the 40F1K0 at 838 pieces and the 40F1K0E at 792 pieces.