Ohmite 43F3K5 Equivalent & Substitute Parts

Part Overview

The Ohmite 43F3K5 is a 4.6 kOhms ±1% 3W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production and maintains 1025 units in new original stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring 4.6 kOhm resistive elements with 3W power dissipation capability.

Substiute Parts

43F3K5

OhmiteIn Stock: 110443F3K5 Datasheet

Current PartRFQ

ALSR033K500FE12

Vishay DaleIn Stock: 814ALSR033K500FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Ohmite 43F3K5 is determined by the following critical parameters:

• Resistance value: 4.6 kOhms (exact match required)
• Tolerance: ±1% (equivalent or tighter tolerance acceptable)
• Power rating: 3W (equal or greater acceptable)
• Composition: Wirewound (maintains performance characteristics)
• Package: Axial (mechanical and electrical compatibility)
• Termination count: 2 (standard through-hole configuration)

The Vishay Dale ALSR033K500FE12 meets all substitution criteria with identical resistance, tolerance, power rating, composition, and package configuration.

Parameter Comparison

Engineering Selection Recommendations

Both the Ohmite 43F3K5 and Vishay Dale ALSR033K500FE12 are active production components with identical electrical specifications for resistance, tolerance, and power dissipation. The primary differentiation factors are:

RoHS Compliance: The Vishay Dale ALSR033K500FE12 is ROHS3 compliant, while the Ohmite 43F3K5 is RoHS non-compliant. Applications subject to RoHS regulatory requirements must use the Vishay Dale substitute.

Physical Dimensions: The Vishay Dale part features a smaller diameter (0.180" vs 0.220") and shorter length (0.500" vs 0.594"), which may provide advantages in space-constrained PCB layouts while maintaining identical electrical performance.

Temperature Coefficient: The Ohmite part exhibits ±20ppm/°C versus ±30ppm/°C for the Vishay Dale part. Applications requiring superior temperature stability should retain the original Ohmite specification.

Moisture Resistance: The Vishay Dale ALSR series includes moisture-resistant construction with MSL rating of 1 (Unlimited), providing enhanced reliability in humid environments.

Frequently Asked Questions (FAQ)

Q: Can the Vishay Dale ALSR033K500FE12 directly replace the Ohmite 43F3K5 in existing designs?

A: Yes, the Vishay Dale part is electrically equivalent with identical resistance (4.6 kOhms), tolerance (±1%), and power rating (3W). Both use axial wirewound construction with two terminations. Physical dimensions differ slightly; verify PCB layout clearances before substitution.

Q: What is the impact of the different temperature coefficients?

A: The Ohmite 43F3K5 has a temperature coefficient of ±20ppm/°C compared to ±30ppm/°C for the Vishay Dale part. For applications operating across wide temperature ranges or requiring high precision, the tighter coefficient of the Ohmite part may be preferred. For most general-purpose applications, both coefficients are acceptable.

Q: Does the smaller size of the Vishay Dale part affect performance?

A: No. The smaller physical dimensions (0.180" Dia x 0.500" L versus 0.220" Dia x 0.594" L) do not affect electrical performance. Both parts dissipate 3W and maintain ±1% tolerance. The compact size of the Vishay Dale part may provide layout advantages in space-constrained applications.

Q: Which part should be selected for RoHS-regulated applications?

A: The Vishay Dale ALSR033K500FE12 is ROHS3 compliant and must be used for applications subject to RoHS directives. The Ohmite 43F3K5 is RoHS non-compliant and is not suitable for RoHS-regulated environments.

Q: Are there any moisture sensitivity considerations?

A: The Vishay Dale ALSR033K500FE12 features moisture-resistant construction with MSL rating 1 (Unlimited), suitable for high-humidity storage and operating environments. The Ohmite 43F3K5 has MSL rating of Not Applicable. For applications in humid conditions, the Vishay Dale part provides enhanced reliability.