43F27R Equivalent & Substitute Parts

Part Overview

The Ohmite 43F27R is a 27 Ohm ±1% 3W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is currently active in production with 775 units in stock. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits functional alternatives that meet the same electrical and mechanical specifications.

Substiute Parts

43F27R

OhmiteIn Stock: 87643F27R Datasheet

Current PartRFQ

43F27RE

OhmiteIn Stock: 118243F27RE Datasheet

DirectRFQ

ALSR0327R00FE12

Vishay DaleIn Stock: 1104ALSR0327R00FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 43F27R are qualified based on the following critical parameters:

• Resistance value: 27 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 3W (exact match required)
• Composition: Wirewound (exact match required)
• Package type: Axial (exact match required)
• Number of terminations: 2 (exact match required)

The identified substitutes meet these core electrical and mechanical requirements. Variations in temperature coefficient, physical dimensions, and compliance certifications are noted but do not prevent functional substitution when the primary parameters align.

Parameter Comparison

Engineering Selection Recommendations

43F27RE (Ohmite): This part is the direct equivalent from the same manufacturer and series. It maintains identical electrical specifications and physical dimensions. The primary distinction is packaging format (Bulk) and RoHS3 compliance status. Selection of this substitute is appropriate when RoHS3 compliance is required or when bulk packaging aligns with procurement requirements.

ALSR0327R00FE12 (Vishay Dale): This part meets all core electrical specifications (27 Ohms, ±1%, 3W, wirewound, axial). It is RoHS3 compliant and rated for operating temperatures from -65°C to 250°C. The temperature coefficient is ±30ppm/°C (compared to ±20ppm/°C for the 43F27R), and physical dimensions are slightly smaller (0.180" Dia x 0.500" L). This substitute is suitable for applications where the broader operating temperature range and moisture-resistant construction provide design advantages, provided that the dimensional difference does not create mechanical constraints in the circuit layout.

Frequently Asked Questions (FAQ)

Q: Can the 43F27RE be used as a direct replacement for the 43F27R?

A: Yes. Both parts share identical electrical specifications (27 Ohms, ±1%, 3W) and physical dimensions (0.220" Dia x 0.594" L). The 43F27RE is packaged in bulk format and carries RoHS3 compliance, making it a functional equivalent. No circuit redesign is required.

Q: What are the key differences between the 43F27R and ALSR0327R00FE12?

A: Both parts meet the core electrical requirements (27 Ohms, ±1%, 3W, wirewound, axial). The ALSR0327R00FE12 has a slightly higher temperature coefficient (±30ppm/°C vs. ±20ppm/°C), a broader operating temperature range (-65°C to 250°C), moisture-resistant construction, and smaller physical dimensions (0.180" Dia x 0.500" L vs. 0.220" Dia x 0.594" L). These differences do not affect electrical substitution but may impact thermal stability and physical board layout.

Q: Are there any compliance differences between these parts?

A: The 43F27R is RoHS non-compliant. Both 43F27RE and ALSR0327R00FE12 are RoHS3 compliant. If RoHS3 compliance is a design requirement, either substitute part is appropriate.

Q: Will the smaller size of the ALSR0327R00FE12 affect circuit board layout?

A: The ALSR0327R00FE12 is physically smaller (0.180" Dia x 0.500" L) compared to the 43F27R (0.220" Dia x 0.594" L). If the circuit board layout has been designed with specific spacing for the larger 43F27R dimensions, the smaller substitute may require layout verification to confirm that component clearances and thermal management remain adequate.

Q: Which substitute should I select for a new design?

A: Selection depends on design requirements. If RoHS3 compliance and identical dimensions are priorities, select the 43F27RE. If a broader operating temperature range, moisture resistance, and compact size are beneficial, select the ALSR0327R00FE12. Both parts are electrically equivalent for the specified 27 Ohm, ±1%, 3W application.