Equivalent & Substitute Parts for Ohmite 810F3K0

Part Overview

The Ohmite 810F3K0 is a 3 kOhms ±1% 10W wirewound chassis mount resistor from the Metal-Mite®89 series, designed for applications requiring precision resistive elements with high power dissipation capability. This component features aluminum housing with flanged mounting and solder lug termination, suitable for chassis-mounted installations in industrial and electronic equipment.

The 810F3K0 is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this resistor specification.

Substiute Parts

810F3K0

OhmiteIn Stock: 1206810F3K0 Datasheet

Current PartRFQ

KAL25FB3K00

Stackpole Electronics IncIn Stock: 1153KAL25FB3K00 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 810F3K0 are identified based on the following critical electrical and mechanical parameters:

• Resistance Value: 3 kOhms (exact match required)
• Tolerance: ±1% (precision specification)
• Composition: Wirewound (technology type)
• Temperature Coefficient: ±20ppm/°C (stability specification)
• Operating Temperature Range: -55°C to 275°C (environmental capability)
• Mounting Feature: Flanges (mechanical interface)
• Lead Style: Solder Lugs (termination type)
• Housing Type: Aluminum (material specification)

The Stackpole Electronics Inc KAL25FB3K00 qualifies as a substitute because it maintains all critical electrical parameters (resistance, tolerance, temperature coefficient, operating range) and mechanical compatibility (flanged aluminum housing with solder lug termination). The primary difference is an increased power rating (25W versus 10W), which represents an enhancement rather than a limitation for applications designed around the 810F3K0 specification.

Parameter Comparison

Engineering Selection Recommendations

The Stackpole Electronics Inc KAL25FB3K00 is the qualified substitute for the obsolete Ohmite 810F3K0. Selection is based on the following engineering criteria:

Electrical Compatibility: Both components share identical resistance (3 kOhms), tolerance (±1%), temperature coefficient (±20ppm/°C), and operating temperature range (-55°C to 275°C). These parameters ensure functional equivalence in circuit applications.

Mechanical Compatibility: Both resistors feature aluminum housing with flanged mounting and solder lug termination, ensuring direct mechanical interchange in chassis-mounted installations.

Product Status: The KAL25FB3K00 maintains active production status, providing reliable supply chain availability compared to the obsolete 810F3K0.

Regulatory Compliance: The KAL25FB3K00 is ROHS3 compliant, whereas the 810F3K0 is RoHS non-compliant. This distinction is relevant for applications subject to RoHS regulatory requirements.

Power Rating Enhancement: The KAL25FB3K00 provides 25W power rating versus the 810F3K0's 10W rating. This represents a design margin improvement and does not restrict application scope.

Frequently Asked Questions (FAQ)

Q: Can the Stackpole KAL25FB3K00 directly replace the Ohmite 810F3K0 in existing designs?

A: Yes. Both components share identical electrical specifications (3 kOhms ±1%, ±20ppm/°C, -55°C to 275°C operating range) and mechanical interfaces (flanged aluminum housing, solder lug termination). The higher power rating of the KAL25FB3K00 does not create compatibility issues.

Q: What are the physical dimension differences between these two resistors?

A: The KAL25FB3K00 is physically larger. The 810F3K0 measures 0.750" L x 0.812" W x 0.400" H (seated), while the KAL25FB3K00 measures 1.062" L x 1.080" W x 0.577" H (seated). Chassis layout space must accommodate the larger substitute component.

Q: Are there RoHS compliance implications when substituting the KAL25FB3K00 for the 810F3K0?

A: Yes. The 810F3K0 is RoHS non-compliant, while the KAL25FB3K00 is ROHS3 compliant. For applications subject to RoHS directives, the KAL25FB3K00 substitution improves regulatory alignment.

Q: Does the increased power rating of the KAL25FB3K00 affect circuit performance?

A: No. The 25W rating of the KAL25FB3K00 provides additional thermal margin compared to the 10W specification of the 810F3K0. This enhancement does not alter electrical behavior in circuits designed for the original 10W component.

Q: What packaging format is available for the Stackpole KAL25FB3K00?

A: The KAL25FB3K00 is supplied in bulk packaging, consistent with the axial, box package type of the original 810F3K0.