Ohmite 810F1K0 Wirewound Chassis Mount Resistor – Equivalent & Substitute Parts

Part Overview

The Ohmite 810F1K0 is a 1 kOhms ±1% 10W wirewound chassis mount resistor from the Metal-Mite®89 series, designed for applications requiring precision resistance with high power dissipation capability. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs. The 810F1K0 features aluminum housing with flanged mounting, solder lugs, and operates across a wide temperature range of -55°C to 275°C.

Substiute Parts

810F1K0

OhmiteIn Stock: 946810F1K0 Datasheet

Current PartRFQ

810F1K0E

OhmiteIn Stock: 764810F1K0E Datasheet

DirectRFQ

810F1K0E

OhmiteIn Stock: 764810F1K0E Datasheet

DirectRFQ

KAL10FB1K00

Stackpole Electronics IncIn Stock: 1836KAL10FB1K00 Datasheet

DirectRFQ

RH0101K000FC02

Vishay DaleIn Stock: 949RH0101K000FC02 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 810F1K0 is determined by the following critical parameters: resistance value (1 kOhms), tolerance (±1%), composition (wirewound), temperature coefficient (±20ppm/°C), housing type (aluminum), mounting feature (flanges), and lead style (solder lugs). Power rating may be equal or higher without affecting compatibility. Operating temperature range and physical dimensions must remain within acceptable limits for mechanical fit and thermal performance.

The substitute parts are grouped into two categories:

Category 1 – Direct Equivalent (Same Power Rating):

• 810F1K0E (Ohmite) – Identical electrical and mechanical specifications; active product status with ROHS3 compliance

Category 2 – Higher Power Rating Substitutes (12.5W):

• KAL10FB1K00 (Stackpole Electronics Inc) – Increased power rating with moisture-resistant features; ROHS3 compliant
• RH0101K000FC02 (Vishay Dale) – Increased power rating with moisture-resistant features; RoHS non-compliant

Parameter Comparison

Engineering Selection Recommendations

For direct replacement with active product status and modern compliance: Select the 810F1K0E (Ohmite). This part maintains identical electrical and mechanical specifications to the 810F1K0 while offering active product status and ROHS3 compliance. It is the preferred choice for applications where the original 10W power rating is sufficient and regulatory compliance is required.

For applications requiring higher power dissipation: The KAL10FB1K00 (Stackpole Electronics Inc) and RH0101K000FC02 (Vishay Dale) both provide 12.5W power rating, accommodating designs with increased thermal demands. The KAL10FB1K00 is ROHS3 compliant and includes moisture-resistant features. The RH0101K000FC02 is RoHS non-compliant and has a reduced maximum operating temperature of 250°C compared to the 810F1K0's 275°C.

For legacy systems requiring RoHS non-compliant components: The RH0101K000FC02 maintains compatibility with existing non-compliant designs, though it operates at a lower maximum temperature and is subject to REACH regulations.

Frequently Asked Questions (FAQ)

Q: Can the 810F1K0E be used as a direct replacement for the 810F1K0? A: Yes. The 810F1K0E is electrically and mechanically identical to the 810F1K0, with the same 1 kOhms resistance, ±1% tolerance, 10W power rating, and operating temperature range. The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 versus non-compliant).

Q: What is the advantage of using KAL10FB1K00 or RH0101K000FC02 over the 810F1K0E? A: Both parts offer increased power rating (12.5W versus 10W), allowing for higher current handling and thermal margin in power-dissipative applications. The KAL10FB1K00 additionally includes moisture-resistant features and ROHS3 compliance.

Q: Are there mechanical compatibility concerns when substituting with higher power-rated parts? A: Physical dimensions are similar across all substitutes (approximately 0.750" L × 0.800–0.812" W), with height variations of 0.400–0.421". Verify mounting clearance in your specific application, particularly if space is constrained.

Q: Does the RH0101K000FC02 have any temperature limitations? A: Yes. The RH0101K000FC02 operates to a maximum of 250°C, compared to 275°C for the 810F1K0 and 810F1K0E. Applications requiring operation above 250°C must use the 810F1K0E or KAL10FB1K00.

Q: Which substitute part is recommended for new designs? A: The 810F1K0E is recommended for new designs requiring direct equivalence and modern compliance. For applications with higher power dissipation needs, the KAL10FB1K00 is preferred due to its ROHS3 compliance and moisture-resistant construction.