Equivalent & Substitute Parts for 805F30R

Part Overview

The 805F30R is a 30 Ohms ±1% 5W wirewound chassis mount resistor manufactured by Ohmite from the Metal-Mite®89 series. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations. The part features aluminum housing with flanged mounting and solder lug termination, designed for applications requiring precision resistance with moderate power dissipation in a compact chassis-mounted form factor.

Substiute Parts

805F30R

OhmiteIn Stock: 858805F30R Datasheet

Current PartRFQ

RH00530R00FC02

Vishay DaleIn Stock: 972RH00530R00FC02 Datasheet

DirectRFQ

UAL5-30RF8

RiedonIn Stock: 981UAL5-30RF8 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 805F30R is determined by the following critical parameters:

• Resistance value: 30 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Wirewound (exact match required)
• Temperature Coefficient: ±20ppm/°C (exact match required)
• Housing Type: Aluminum (exact match required)
• Mounting Feature: Flanges (exact match required)
• Lead Style: Solder Lugs (exact match required)
• Package Type: Axial, Box (exact match required)

Power rating may exceed the original 5W specification, provided the substitute maintains identical physical dimensions and mounting characteristics. Operating temperature range may vary within acceptable limits for the application. Compliance certifications and product status are secondary considerations that do not affect electrical or mechanical interchangeability.

Parameter Comparison

Engineering Selection Recommendations

Both RH00530R00FC02 and UAL5-30RF8 meet the core electrical and mechanical substitution criteria for the 805F30R. Selection between these alternatives depends on specific application requirements:

RH00530R00FC02 (Vishay Dale RH series) maintains the same physical footprint and power rating elevation to 7.5W. This part operates within a reduced upper temperature limit of 250°C compared to the original 275°C specification. RoHS non-compliance status matches the original part.

UAL5-30RF8 (Riedon UAL series) provides the highest compliance profile with ROHS3 certification and REACH unaffected status. Operating temperature range extends to 275°C, matching the original specification. Physical dimensions remain within acceptable tolerance, with height variation of 0.005" (0.12mm). Enhanced features including current sense capability, flame proof construction, and pulse withstanding characteristics are available in this option.

For applications requiring RoHS3 compliance or extended temperature operation to 275°C, UAL5-30RF8 is the preferred substitute. For applications with less stringent compliance requirements and operation below 250°C, RH00530R00FC02 provides an equivalent alternative.

Frequently Asked Questions (FAQ)

Q: Can RH00530R00FC02 or UAL5-30RF8 be used as direct replacements for 805F30R in existing designs?

A: Both parts are electrically and mechanically compatible. Resistance, tolerance, temperature coefficient, composition, housing type, mounting features, and lead style are identical. Physical dimensions are within acceptable tolerance. The 7.5W power rating of both substitutes exceeds the original 5W specification, providing additional thermal margin. Verify that the application's thermal environment and circuit design accommodate the slightly increased height (0.005" maximum difference).

Q: What is the impact of the operating temperature range difference between RH00530R00FC02 and UAL5-30RF8?

A: RH00530R00FC02 operates to 250°C maximum, while UAL5-30RF8 and the original 805F30R operate to 275°C. For applications requiring sustained operation above 250°C, UAL5-30RF8 is required. For applications with maximum operating temperatures at or below 250°C, both parts are suitable.

Q: Are there compliance or certification differences between the substitute parts?

A: UAL5-30RF8 carries ROHS3 compliance certification, while RH00530R00FC02 and the original 805F30R are RoHS non-compliant. For applications subject to RoHS3 requirements, UAL5-30RF8 is the appropriate selection. Both substitutes are EAR99 classified and share the same HTSUS code (8533.21.0080) as the original part.

Q: How do physical dimension variations affect PCB layout and mechanical assembly?

A: UAL5-30RF8 dimensions are 0.598" L x 0.646" W with 0.335" maximum seated height, compared to 805F30R at 0.600" L x 0.646" W with 0.330" maximum seated height. Length variation is 0.002" (0.04mm) and height variation is 0.005" (0.12mm). These differences are within standard PCB layout tolerances for flanged chassis mount resistors. Verify clearance in confined mounting areas before implementation.

Q: What additional features does UAL5-30RF8 provide compared to the original 805F30R?

A: UAL5-30RF8 includes current sense capability, flame proof construction, pulse withstanding characteristics, and safety features. These enhancements do not affect basic electrical performance but provide additional protection and functionality for demanding applications. Standard circuit operation requires no design modifications to utilize these features.