Ohmite 40F8K0 Equivalent & Substitute Parts

Part Overview

The Ohmite 40F8K0 is an 8 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 inventory availability of 1010 pieces. The primary reason for identifying substitute parts relates to packaging options and RoHS compliance requirements in modern supply chains, as the original 40F8K0 is RoHS non-compliant while functionally equivalent alternatives may offer improved regulatory alignment.

Substiute Parts

40F8K0

OhmiteIn Stock: 108040F8K0 Datasheet

Current PartRFQ

40F8K0E

OhmiteIn Stock: 79640F8K0E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 40F8K0E qualifies as a parametric equivalent to the 40F8K0 based on strict electrical and mechanical parameter matching. The substitution is valid because both parts share identical specifications across all critical selection criteria: 8 kOhms resistance value, ±1% tolerance, 10W power rating, wirewound composition, axial package configuration, ±20ppm/°C temperature coefficient, and matching physical dimensions of 0.406" Dia x 1.902" L (10.30mm x 48.30mm).

The key differentiator between these parts is packaging format (Bulk for 40F8K0E versus standard for 40F8K0) and RoHS compliance status (ROHS3 Compliant for 40F8K0E versus RoHS non-compliant for 40F8K0). These differences do not affect electrical or mechanical performance in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the 40F8K0 and 40F8K0E are active production components from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on regulatory compliance requirements and supply chain constraints.

The 40F8K0E is the preferred selection for applications subject to RoHS3 compliance mandates, as it meets current regulatory standards while maintaining full functional equivalence. The 40F8K0 remains suitable for applications without RoHS compliance requirements or for legacy system maintenance where non-compliant components are acceptable.

Inventory availability differs between the two parts, with 40F8K0 maintaining higher stock levels (1010 pieces) compared to 40F8K0E (706 pieces). Packaging format differences (Bulk for 40F8K0E) may influence procurement workflows but do not affect component performance.

Frequently Asked Questions (FAQ)

Q: Are the 40F8K0 and 40F8K0E electrically identical?

A: Yes. Both parts share identical resistance (8 kOhms), tolerance (±1%), power rating (10W), temperature coefficient (±20ppm/°C), and composition (wirewound). They are functionally interchangeable in circuit applications.

Q: What is the difference between these two part numbers?

A: The primary differences are RoHS compliance status (40F8K0E is ROHS3 Compliant; 40F8K0 is non-compliant) and packaging format (40F8K0E is supplied in Bulk). Electrical and mechanical specifications are identical.

Q: Can I use 40F8K0E as a direct replacement for 40F8K0?

A: Yes. The 40F8K0E is a direct parametric equivalent with matching physical dimensions (0.406" Dia x 1.902" L), axial package configuration, and all electrical specifications. No circuit modifications are required.

Q: Which part should I specify for new designs?

A: For designs subject to RoHS3 compliance requirements, specify the 40F8K0E. For applications without regulatory compliance mandates, either part is acceptable based on availability and procurement preferences.

Q: Are there any performance differences between these parts?

A: No. Both parts are manufactured by Ohmite within the Ohmicone® 40 series and deliver identical performance across all specified parameters including resistance accuracy, power dissipation capability, and temperature stability.