Ohmite 41F400 Equivalent & Substitute Parts

Part Overview

The Ohmite 41F400 is a 400 Ohm ±1% 1W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production with 856 pieces in stock. The part is RoHS non-compliant and classified under HTSUS code 8533.21.0080. 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

41F400

OhmiteIn Stock: 92441F400 Datasheet

Current PartRFQ

41F400E

OhmiteIn Stock: 95641F400E Datasheet

DirectRFQ

ALSR01400R0FE12

Vishay DaleIn Stock: 920ALSR01400R0FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 41F400 are qualified based on the following criteria:

Primary Electrical Match: Resistance value of 400 Ohms with ±1% tolerance and 1W power rating are mandatory for functional equivalence.

Mechanical Compatibility: Axial package configuration with two terminations ensures direct board-level compatibility without layout modifications.

Construction Type: Wirewound composition is maintained across all substitutes to preserve thermal and frequency response characteristics.

Allowed Parameter Variance: Temperature coefficient may vary (±20ppm/°C to ±30ppm/°C) within acceptable engineering tolerances for general-purpose applications. Physical dimensions may have minor variations within standard axial resistor envelope specifications.

Parameter Comparison

Engineering Selection Recommendations

41F400E (Ohmite): Direct manufacturer equivalent with identical electrical and mechanical specifications. Offers ROHS3 compliance upgrade over the original 41F400. Recommended for applications requiring regulatory compliance without performance trade-offs. Identical temperature coefficient and series lineage ensure drop-in compatibility.

ALSR01400R0FE12 (Vishay Dale): Cross-manufacturer substitute with equivalent core specifications. Provides ROHS3 compliance and moisture-resistant construction. Temperature coefficient of ±30ppm/°C represents acceptable variance for general-purpose resistor applications. Specified operating temperature range of -65°C ~ 250°C extends environmental capability. Physical dimensions are slightly smaller (0.110" Dia x 0.406" L versus 0.126" Dia x 0.437" L), which may provide layout advantages in space-constrained designs.

Frequently Asked Questions (FAQ)

Q: Can 41F400E be used as a direct replacement for 41F400?

A: Yes. The 41F400E is a direct equivalent with identical resistance, tolerance, power rating, temperature coefficient, and axial package configuration. The primary difference is ROHS3 compliance status.

Q: What is the significance of the temperature coefficient difference between 41F400 and ALSR01400R0FE12?

A: The 41F400 specifies ±20ppm/°C while the ALSR01400R0FE12 specifies ±30ppm/°C. Both values are within standard wirewound resistor tolerances and acceptable for general-purpose circuit applications where precision temperature tracking is not critical.

Q: Are there physical dimension differences between these parts?

A: Yes. The 41F400 and 41F400E measure 0.126" Dia x 0.437" L (3.20mm x 11.10mm). The ALSR01400R0FE12 measures 0.110" Dia x 0.406" L (2.79mm x 10.31mm). Both maintain standard axial through-hole termination and are mechanically compatible with typical PCB layouts, though the Vishay Dale part occupies slightly less board space.

Q: Which substitute offers the best environmental performance?

A: The ALSR01400R0FE12 provides moisture-resistant construction and a specified operating temperature range of -65°C ~ 250°C, compared to unspecified operating temperature ranges for the Ohmite parts. This makes it suitable for applications with extended environmental requirements.

Q: Are all three parts RoHS compliant?

A: The 41F400 is RoHS non-compliant. Both 41F400E and ALSR01400R0FE12 are ROHS3 compliant, meeting current regulatory requirements for restricted substance elimination.