Ohmite 40F30K Equivalent & Substitute Parts

Part Overview

The Ohmite 40F30K is a 30 kOhms ±1% 10W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production and maintains 856 pieces in new original stock. The 40F30K is classified as RoHS non-compliant, which may necessitate identification of compliant alternatives for applications subject to RoHS3 regulations or procurement requirements mandating environmental compliance certifications.

Substiute Parts

40F30K

OhmiteIn Stock: 91040F30K Datasheet

Current PartRFQ

40F30KE

OhmiteIn Stock: 118640F30KE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Ohmite 40F30KE qualifies as a parametric equivalent to the 40F30K based on identical electrical and mechanical specifications. Substitution eligibility is determined by the following critical parameters:

• Resistance value: 30 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 10W (exact match required)
• Wirewound composition (exact match required)
• Axial package configuration (exact match required)
• Temperature coefficient: ±20ppm/°C (exact match required)
• Physical dimensions: 0.406" Dia x 1.902" L (exact match required)

The 40F30KE maintains all electrical and mechanical parameters identical to the 40F30K. The primary distinction is packaging format (Bulk versus standard) and RoHS3 compliance status, which does not affect electrical or mechanical interchangeability.

Parameter Comparison

Engineering Selection Recommendations

Selection between the 40F30K and 40F30KE is determined by regulatory and procurement requirements rather than electrical performance:

The 40F30K is suitable for applications without RoHS3 compliance mandates or where legacy component specifications are required.

The 40F30KE is the appropriate selection for applications subject to RoHS3 regulations, EU procurement directives, or organizational policies requiring environmental compliance certifications. Both components are active products with adequate inventory availability.

Frequently Asked Questions (FAQ)

Q: Are the 40F30K and 40F30KE electrically interchangeable?

A: Yes. Both components share identical electrical specifications: 30 kOhms resistance, ±1% tolerance, 10W power rating, ±20ppm/°C temperature coefficient, and wirewound composition. They are direct electrical substitutes.

Q: Are the 40F30K and 40F30KE mechanically interchangeable?

A: Yes. Both components feature identical axial package configuration and physical dimensions (0.406" Dia x 1.902" L / 10.30mm x 48.30mm). They are direct mechanical substitutes suitable for identical PCB layouts and through-hole mounting applications.

Q: What is the difference between the 40F30K and 40F30KE?

A: The primary differences are packaging format (standard versus Bulk) and RoHS compliance status. The 40F30K is RoHS non-compliant, while the 40F30KE is ROHS3 compliant. All electrical and mechanical parameters are identical.

Q: Which part should I select for new designs?

A: Selection depends on regulatory requirements. For applications requiring RoHS3 compliance, select the 40F30KE. For applications without compliance mandates, either part is acceptable based on availability and procurement preferences.

Q: Can I use the 40F30KE as a direct replacement for the 40F30K in existing assemblies?

A: Yes. The 40F30KE is a direct substitute for the 40F30K in all electrical and mechanical aspects. No circuit modifications or PCB redesign is required.