40F20KE Equivalent & Substitute Parts

Part Overview

The 40F20KE is a 20 kOhms ±1% 10W axial wirewound resistor manufactured by Ohmite in the Ohmicone® 40 series. This component is designed for through-hole applications requiring precision resistance with high power dissipation capability. The part maintains active product status with 761 units currently in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required for procurement flexibility, inventory management, or supply chain continuity.

Substiute Parts

40F20KE

OhmiteIn Stock: 78940F20KE Datasheet

Current PartRFQ

RS01020K00FE73

Vishay DaleIn Stock: 3046RS01020K00FE73 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 40F20KE are qualified based on the following critical parameters:

• Resistance Value: Exact match at 20 kOhms
• Tolerance: Exact match at ±1%
• Power Rating: Exact match at 10W
• Composition: Wirewound technology
• Package Type: Axial through-hole configuration
• Temperature Coefficient: ±20ppm/°C
• Termination Count: 2-terminal configuration
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected

The RS01020K00FE73 from Vishay Dale meets all substitution criteria with identical electrical specifications and compatible mechanical form factor.

Parameter Comparison

Engineering Selection Recommendations

Both the 40F20KE and RS01020K00FE73 are active products with full ROHS3 compliance and REACH unaffected status, qualifying them for equivalent use in applications requiring 20 kOhms ±1% 10W axial wirewound resistors. The RS01020K00FE73 includes moisture-resistant construction as an additional feature. Physical dimensions vary slightly between manufacturers; the 40F20KE measures 0.406" diameter by 1.902" length, while the RS01020K00FE73 measures 0.375" diameter by 1.780" length. Both configurations are compatible with standard through-hole PCB layouts. Selection between these parts should be based on procurement availability, packaging requirements (bulk versus cut tape), and specific board space constraints.

Frequently Asked Questions (FAQ)

Q: Can the RS01020K00FE73 directly replace the 40F20KE in existing designs?

A: Yes. Both parts share identical electrical specifications: 20 kOhms ±1% tolerance, 10W power rating, ±20ppm/°C temperature coefficient, and 2-terminal axial configuration. Physical dimensions differ slightly; verify PCB hole spacing and component clearance accommodate the RS01020K00FE73 dimensions of 0.375" diameter by 1.780" length.

Q: What is the significance of the moisture-resistant feature on the RS01020K00FE73?

A: The moisture-resistant construction on the RS01020K00FE73 provides enhanced environmental protection. This feature does not affect electrical performance but may extend component reliability in humid or corrosive environments.

Q: Are there packaging differences between these parts?

A: Yes. The 40F20KE is supplied in bulk packaging, while the RS01020K00FE73 is supplied in cut tape (CT) format. Packaging selection depends on assembly process requirements and inventory management practices.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the 40F20KE and RS01020K00FE73 are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory standards for electronic component use.

Q: What inventory considerations apply to these substitutes?

A: The 40F20KE has 761 units in stock, while the RS01020K00FE73 has 2939 units available. Higher availability of the RS01020K00FE73 may support extended production schedules or reduce lead time risk.