Ohmite 805F100 Equivalent & Substitute Parts

Part Overview

The Ohmite 805F100 is a 100 Ohms ±1% 5W wirewound chassis mount resistor from the Metal-Mite®89 series. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part features aluminum housing with flanged mounting and solder lug termination, suitable for applications requiring precision wirewound resistors with stable temperature characteristics across extended operating ranges.

Substiute Parts

805F100

OhmiteIn Stock: 1049805F100 Datasheet

Current PartRFQ

805F100E

OhmiteIn Stock: 847805F100E Datasheet

DirectRFQ

RH005100R0FC02

Vishay DaleIn Stock: 1191RH005100R0FC02 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 805F100 is determined by the following critical parameters:

• Resistance value: 100 Ohms
• Tolerance: ±1%
• Composition: Wirewound
• Mounting configuration: Flanged chassis mount with solder lugs
• Physical envelope: 0.600" L x 0.646" W
• Temperature coefficient: ±20ppm/°C

Two substitute parts meet these core electrical and mechanical criteria:

1. 805F100E (Ohmite) – Direct equivalent with identical electrical specifications and physical dimensions. Primary difference is active product status and improved RoHS3 compliance.

2. RH005100R0FC02 (Vishay Dale) – Cross-manufacturer substitute with matching resistance, tolerance, and mounting configuration. Offers higher power rating (7.5W vs 5W) and moisture-resistant coating, with minor dimensional variance in seated height (0.335" vs 0.330").

Parameter Comparison

Engineering Selection Recommendations

805F100E (Ohmite) is the primary substitute for the obsolete 805F100. Both parts are from the same manufacturer and series, with identical electrical and mechanical specifications. The 805F100E offers the advantage of active product status and RoHS3 compliance, making it suitable for new designs and applications with regulatory requirements.

RH005100R0FC02 (Vishay Dale) serves as a cross-manufacturer alternative when Ohmite parts are unavailable. This part provides higher power dissipation capability (7.5W) and moisture-resistant coating, beneficial for harsh environments. The maximum operating temperature is reduced to 250°C compared to 275°C for the Ohmite parts, and seated height increases by 0.005" (0.13mm). These differences require evaluation against specific application constraints.

Selection between these substitutes depends on procurement availability, regulatory compliance requirements, and thermal design margins in the target application.

Frequently Asked Questions (FAQ)

Q: Can 805F100E directly replace 805F100 in existing designs?

A: Yes. The 805F100E is electrically and mechanically identical to the 805F100, with matching resistance, tolerance, power rating, temperature coefficient, and physical dimensions. The primary differences are product status (active vs. obsolete) and improved RoHS3 compliance.

Q: Is RH005100R0FC02 a suitable substitute for 805F100?

A: Yes, with design considerations. The RH005100R0FC02 matches all critical electrical parameters (100 Ohms, ±1%, ±20ppm/°C) and physical envelope. However, it offers higher power rating (7.5W vs 5W), reduced maximum operating temperature (250°C vs 275°C), and 0.005" greater seated height. Applications operating near 275°C or with tight height constraints require evaluation.

Q: What are the key parameters that determine substitutability?

A: Substitution is based on resistance value, tolerance, power rating compatibility, temperature coefficient, operating temperature range, physical dimensions, mounting configuration, and lead style. All substitute parts maintain 100 Ohms ±1% wirewound composition with flanged chassis mount and solder lug termination.

Q: Does packaging type affect substitutability?

A: Packaging type (Tray vs. Bulk) does not affect electrical or mechanical compatibility. It impacts procurement quantity and handling but not functional performance or board-level integration.

Q: Are there compliance differences between the substitutes?

A: Yes. The 805F100E is RoHS3 compliant, while both the 805F100 and RH005100R0FC02 are RoHS non-compliant. Applications subject to RoHS regulations should prioritize the 805F100E. The RH005100R0FC02 is REACH Affected, while the Ohmite parts are REACH Unaffected.