Ohmite 40F2K7 Equivalent & Substitute Parts

Part Overview

The Ohmite 40F2K7 is a 2.7 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 1120 units in new original stock. The 40F2K7 is classified as RoHS non-compliant, which may necessitate identification of compliant alternatives for applications subject to RoHS regulations or procurement policies requiring RoHS certification.

Substiute Parts

40F2K7

OhmiteIn Stock: 121540F2K7 Datasheet

Current PartRFQ

40F2K7E

OhmiteIn Stock: 115140F2K7E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 40F2K7 is determined by strict equivalence across the following parameters:

• Resistance value: 2.7 kOhms
• Tolerance: ±1%
• Power rating: 10W
• Composition: Wirewound
• Temperature coefficient: ±20ppm/°C
• Package type: Axial
• Physical dimensions: 0.406" Dia x 1.902" L (10.30mm x 48.30mm)
• Number of terminations: 2

The 40F2K7E qualifies as a parametric equivalent substitute. Both parts are manufactured by Ohmite within the Ohmicone® 40 series and maintain identical electrical and mechanical specifications. The primary distinction is packaging format and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

Selection between the 40F2K7 and 40F2K7E is determined by regulatory and procurement requirements:

• 40F2K7: Select this part for applications where RoHS non-compliance is acceptable or where legacy component specifications are mandated. Both parts are active in production with adequate inventory levels.

• 40F2K7E: Select this part for applications subject to RoHS3 compliance requirements. The 40F2K7E maintains identical electrical and mechanical performance while meeting ROHS3 certification. Both parts carry REACH Unaffected status and EAR99 export classification.

Both parts are suitable for direct substitution based on electrical performance, thermal characteristics, and physical form factor. Selection should be based on compliance documentation requirements and procurement policy.

Frequently Asked Questions (FAQ)

Q: Are the 40F2K7 and 40F2K7E electrically identical?

A: Yes. Both parts deliver 2.7 kOhms ±1% resistance at 10W power rating with ±20ppm/°C temperature coefficient. Electrical performance is equivalent.

Q: What is the difference between these two parts?

A: The primary differences are packaging format (standard versus bulk) and RoHS compliance status. The 40F2K7 is RoHS non-compliant, while the 40F2K7E is ROHS3 compliant. All electrical and mechanical specifications are identical.

Q: Can I use the 40F2K7E as a direct replacement for the 40F2K7?

A: Yes. The 40F2K7E is a direct parametric equivalent. Physical dimensions, termination count, and all electrical characteristics are identical, enabling direct substitution in circuit board layouts and designs.

Q: Does RoHS compliance affect performance?

A: No. RoHS compliance relates to material composition and manufacturing processes, not electrical or thermal performance. Both parts operate identically within specified parameters.

Q: Are both parts currently available?

A: Yes. The 40F2K7 has 1120 units in new original stock, and the 40F2K7E has 1089 units in new original stock. Both parts maintain active production status.

Q: Which part should I specify for new designs?

A: Specify based on your application's compliance requirements. For RoHS3-regulated applications, specify the 40F2K7E. For applications without RoHS requirements, either part is suitable based on availability and procurement policy.