810F25K Equivalent & Substitute Parts

Part Overview

The Ohmite 810F25K is a 25 kOhms ±1% 10W 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 810F25K 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

810F25K

OhmiteIn Stock: 926810F25K Datasheet

Current PartRFQ

810F25KE

OhmiteIn Stock: 805810F25KE Datasheet

DirectRFQ

825F25KE

ARCOLIn Stock: 1168825F25KE Datasheet

MFR RecommendedRFQ

RH01025K00FC02

Vishay DaleIn Stock: 898RH01025K00FC02 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 810F25K is determined by the following core parameters: resistance value (25 kOhms), tolerance (±1%), composition (wirewound), temperature coefficient (±20ppm/°C), housing type (aluminum), mounting feature (flanges), and lead style (solder lugs). Power rating may vary within acceptable limits for the application, provided the substitute meets or exceeds the original specification. Operating temperature range and compliance certifications are secondary considerations that may influence selection based on application requirements.

The substitute parts are grouped as follows:

Direct Equivalent (Same Power Rating): 810F25KE maintains identical electrical and mechanical specifications with improved product status and RoHS3 compliance.

Higher Power Rating Substitute: 825F25KE provides increased power dissipation capacity (25W vs. 10W) with compatible core parameters, suitable for applications requiring thermal margin.

Alternative Manufacturer (Similar Power Rating): RH01025K00FC02 offers comparable specifications with slightly elevated power rating (12.5W) and moisture-resistant features, though with different compliance status.

Parameter Comparison

Engineering Selection Recommendations

810F25KE (Ohmite): This is the primary substitute for the obsolete 810F25K. It maintains identical electrical specifications and mechanical form factor while offering active product status and RoHS3 compliance. The packaging format differs (tray vs. box), which may affect procurement and handling procedures but does not impact electrical performance.

825F25KE (ARCOL): This substitute provides increased power dissipation (25W) compared to the original 10W specification. Selection of this part is appropriate when thermal margin is required or when the application can accommodate the larger physical dimensions (1.075" L x 1.102" W vs. 0.750" L x 0.812" W). RoHS compliance status is confirmed. Operating temperature range is not specified in available documentation.

RH01025K00FC02 (Vishay Dale): This alternative offers intermediate power rating (12.5W) with moisture-resistant features and active product status. Operating temperature range is limited to -55°C ~ 250°C, which is 25°C lower than the original specification. RoHS non-compliance status matches the original part. Physical dimensions are comparable to the 810F25K.

Frequently Asked Questions (FAQ)

Q: Can the 810F25KE directly replace the 810F25K without circuit modification?

A: Yes. The 810F25KE maintains identical electrical and mechanical specifications. The packaging format change (tray vs. box) does not affect electrical performance or mounting compatibility.

Q: What is the primary reason to select 825F25KE over 810F25KE?

A: The 825F25KE provides higher power dissipation capacity (25W vs. 10W). Selection depends on application thermal requirements. The larger physical dimensions must be verified for fit within the available mounting space.

Q: Are there compliance differences between the substitute parts?

A: Yes. The 810F25KE is RoHS3 compliant, the 825F25KE is RoHS compliant, and the RH01025K00FC02 is RoHS non-compliant. Selection should align with product compliance requirements.

Q: Does the RH01025K00FC02 have any advantages over the Ohmite substitutes?

A: The RH01025K00FC02 includes moisture-resistant features and offers intermediate power rating (12.5W). However, its operating temperature range is limited to -55°C ~ 250°C, which is 25°C lower than the original 810F25K specification.

Q: How do physical dimensions affect substitution?

A: The 810F25KE maintains the original dimensions (0.750" L x 0.812" W). The 825F25KE is larger (1.075" L x 1.102" W) and requires verification of available mounting space. The RH01025K00FC02 dimensions are comparable to the original part.

Q: What packaging formats are available for these substitutes?

A: The 810F25KE is supplied in tray packaging, while both 825F25KE and RH01025K00FC02 are supplied in bulk packaging. Packaging format may affect procurement quantities and handling procedures.