Equivalent & Substitute Parts for Ohmite 43F1K0

Part Overview

The Ohmite 43F1K0 is a 1 kOhms ±1% 3W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is currently active in production with 785 pieces in stock. The part is classified as RoHS non-compliant and operates within a temperature coefficient of ±20ppm/°C. Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating) and mechanical compatibility (axial package, through-hole termination).

Substiute Parts

43F1K0

OhmiteIn Stock: 85943F1K0 Datasheet

Current PartRFQ

43F1K0E

OhmiteIn Stock: 112443F1K0E Datasheet

DirectRFQ

83F1K0

OhmiteIn Stock: 85683F1K0 Datasheet

DirectRFQ

ALSR031K000FE12

Vishay DaleIn Stock: 1165ALSR031K000FE12 Datasheet

DirectRFQ

RS02B1K000FS70

Vishay DaleIn Stock: 1789RS02B1K000FS70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 43F1K0 is determined by the following criteria:

• Electrical Match: Resistance value of 1 kOhms, tolerance of ±1%, and power rating of 3W are mandatory for functional equivalence.
• Mechanical Compatibility: Axial package configuration with two through-hole terminations ensures physical and electrical interchangeability in PCB layouts.
• Composition: Wirewound construction maintains performance characteristics across the specified temperature range.
• Temperature Coefficient: Parts with ±20ppm/°C or ±30ppm/°C are acceptable within the allowed parameter variance for this application category.

The following parts meet these substitution criteria:

1. 43F1K0E (Ohmite) – Direct equivalent with improved RoHS3 compliance
2. 83F1K0 (Ohmite) – Alternative Ohmite series with comparable specifications
3. ALSR031K000FE12 (Vishay Dale) – Cross-manufacturer equivalent with moisture-resistant features
4. RS02B1K000FS70 (Vishay Dale) – Manufacturer-recommended substitute with enhanced environmental rating

Parameter Comparison

Engineering Selection Recommendations

For RoHS3 Compliance Requirements: The 43F1K0E (Ohmite) or ALSR031K000FE12 (Vishay Dale) are preferred substitutes. Both parts are ROHS3 compliant and maintain identical electrical specifications to the original 43F1K0.

For Extended Environmental Operating Range: The ALSR031K000FE12 and RS02B1K000FS70 (both Vishay Dale) provide specified operating temperature ranges of -65°C ~ 250°C, compared to the unspecified range of the original part. These are suitable for applications requiring defined thermal performance boundaries.

For Moisture-Resistant Applications: The ALSR031K000FE12 and RS02B1K000FS70 both feature moisture-resistant construction, providing enhanced reliability in humid or corrosive environments.

For Direct Series Continuity: The 43F1K0E maintains the Ohmicone® 40 series designation and is the direct equivalent with improved compliance status.

For Alternative Ohmite Series: The 83F1K0 (Acrasil® 80 series) provides substitution within the Ohmite product family with comparable electrical and mechanical specifications.

Frequently Asked Questions (FAQ)

Q: Can the 43F1K0E be used as a direct replacement for the 43F1K0? A: Yes. The 43F1K0E is a direct equivalent with identical electrical specifications (1 kOhms ±1%, 3W, ±20ppm/°C) and mechanical package (axial, through-hole). The primary difference is improved RoHS3 compliance status and bulk packaging format.

Q: What is the difference between the Ohmite 43F1K0 and 83F1K0? A: Both parts share identical electrical specifications and axial package configuration. The 83F1K0 belongs to the Acrasil® 80 series and has a slightly smaller diameter (0.217" vs 0.220"). Both are RoHS non-compliant. Selection depends on PCB layout constraints and series preference.

Q: Are Vishay Dale parts compatible with Ohmite 43F1K0 in terms of physical dimensions? A: Yes, all substitute parts maintain axial through-hole configuration with comparable body dimensions. The ALSR031K000FE12 has a smaller diameter (0.180") and shorter length (0.500"), while the RS02B1K000FS70 dimensions are 0.187" Dia x 0.560" L. These minor dimensional variations are within acceptable tolerances for standard through-hole PCB applications.

Q: Which substitute part has the best compliance certifications? A: The 43F1K0E and ALSR031K000FE12 are both ROHS3 compliant. The ALSR031K000FE12 additionally features moisture-resistant construction and a defined operating temperature range of -65°C ~ 250°C.

Q: What is the difference between bulk and tape & reel packaging? A: Bulk packaging (43F1K0E, 83F1K0, ALSR031K000FE12) is suitable for manual assembly and small-volume production. Tape & Reel packaging (RS02B1K000FS70) is optimized for automated pick-and-place assembly in high-volume manufacturing.

Q: Can I use the RS02B1K000FS70 if my design requires RoHS compliance? A: The RS02B1K000FS70 is RoHS non-compliant. For RoHS-compliant applications, use the 43F1K0E or ALSR031K000FE12.

Q: What does the temperature coefficient specification mean for substitution? A: Temperature coefficient (±20ppm/°C or ±30ppm/°C) indicates resistance value drift per degree Celsius. The 43F1K0, 43F1K0E, 83F1K0, and RS02B1K000FS70 all have ±20ppm/°C. The ALSR031K000FE12 has ±30ppm/°C, which is acceptable for most applications but may require verification in precision circuits.