Ohmite 40F2K5 Equivalent & Substitute Parts

Part Overview

The Ohmite 40F2K5 is a 2.5 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 1095 units in new original stock. The 40F2K5 is classified as RoHS non-compliant, which may necessitate identification of compliant alternatives for applications subject to RoHS regulations or procurement policies requiring compliant components.

Substiute Parts

40F2K5

OhmiteIn Stock: 118340F2K5 Datasheet

Current PartRFQ

40F2K5E

OhmiteIn Stock: 82240F2K5E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 40F2K5 is determined by the following critical parameters:

• Resistance value: 2.5 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 10W (exact match required)
• Composition: Wirewound (exact match required)
• Temperature coefficient: ±20ppm/°C (exact match required)
• Package type: Axial (exact match required)
• Physical dimensions: 0.406" Dia x 1.902" L (exact match required)

The 40F2K5E qualifies as a parametric equivalent because it maintains identical electrical specifications and physical form factor. The primary distinction between the main part and its substitute is the RoHS compliance status and packaging configuration.

Parameter Comparison

Engineering Selection Recommendations

The 40F2K5E serves as the direct substitute for the 40F2K5 when RoHS compliance is required. Both parts are active products with confirmed inventory availability. The 40F2K5E achieves RoHS compliance while maintaining identical electrical performance and mechanical compatibility. Selection between these parts depends on regulatory requirements and procurement specifications rather than functional performance.

For applications without RoHS compliance mandates, either part is functionally interchangeable. For applications subject to RoHS regulations or organizational procurement policies requiring compliant components, the 40F2K5E is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can the 40F2K5E be used as a direct replacement for the 40F2K5?

A: Yes. The 40F2K5E is electrically and mechanically identical to the 40F2K5. Both parts share the same resistance value, tolerance, power rating, temperature coefficient, and axial package dimensions. Substitution is valid from a functional standpoint.

Q: What is the primary difference between the 40F2K5 and 40F2K5E?

A: The 40F2K5E is RoHS compliant, while the 40F2K5 is not. The 40F2K5E is supplied in bulk packaging, whereas the 40F2K5 uses standard packaging. Electrical and mechanical specifications are identical.

Q: Are there any compatibility concerns when substituting the 40F2K5E for the 40F2K5?

A: No compatibility concerns exist. Both parts are axial wirewound resistors with identical physical dimensions (0.406" Dia x 1.902" L), termination count, and electrical characteristics. PCB layout and circuit design remain unchanged.

Q: Which part should be selected for new designs?

A: For new designs, the 40F2K5E is the appropriate selection due to its RoHS compliance status, which aligns with current regulatory standards and industry best practices.

Q: What is the moisture sensitivity level difference between these parts?

A: The 40F2K5 lists moisture sensitivity as Not Applicable. The 40F2K5E is rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.