805F2K5 Equivalent & Substitute Parts

Part Overview

The Ohmite 805F2K5 is a 2.5 kOhms ±1% 5W wirewound chassis mount resistor from the Metal-Mite®89 series. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The part features aluminum housing with flanged mounting and solder lug termination, suitable for applications requiring precision wirewound resistors with stable temperature characteristics.

Substiute Parts

805F2K5

OhmiteIn Stock: 1153805F2K5 Datasheet

Current PartRFQ

805F2K5E

OhmiteIn Stock: 791805F2K5E Datasheet

DirectRFQ

KAL10FB2K50

Stackpole Electronics IncIn Stock: 1118KAL10FB2K50 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 805F2K5 are qualified based on the following critical parameters:

• Resistance value: 2.5 kOhms (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 vary within acceptable limits for the application. Operating temperature range and compliance certifications are secondary selection criteria based on specific design requirements.

Parameter Comparison

Engineering Selection Recommendations

The 805F2K5E serves as the direct functional equivalent, maintaining identical electrical specifications while offering active product status and RoHS compliance. This part is the preferred choice for applications where space constraints are not critical and RoHS compliance is required.

The KAL10FB2K50 from Stackpole Electronics Inc provides an alternative with increased power rating (12.5W versus 5W), larger physical dimensions, and ROHS3 compliance. This part is suitable for applications requiring higher thermal dissipation capability or enhanced moisture resistance. The increased size must be verified against PCB layout constraints before selection.

Both substitute parts maintain the critical electrical parameters: 2.5 kOhms resistance, ±1% tolerance, ±20ppm/°C temperature coefficient, and wirewound composition with aluminum housing and flanged mounting.

Frequently Asked Questions (FAQ)

Q: Can the 805F2K5E be used as a direct replacement for the 805F2K5?

A: Yes. The 805F2K5E maintains identical resistance, tolerance, power rating, temperature coefficient, and mounting characteristics. Dimensional differences are minimal (0.626" vs 0.600" length, 0.650" vs 0.646" width). Verify PCB layout clearances before implementation.

Q: What is the primary advantage of the KAL10FB2K50 substitute?

A: The KAL10FB2K50 provides 12.5W power rating compared to the 5W rating of the original part, enabling operation in higher thermal environments. It also offers ROHS3 compliance and moisture-resistant features. Physical size is larger and must be accommodated in the design.

Q: Are all substitute parts RoHS compliant?

A: The 805F2K5E is RoHS compliant. The KAL10FB2K50 is ROHS3 compliant. The original 805F2K5 is RoHS non-compliant. Compliance requirements should be verified against your application standards.

Q: Do the substitute parts have the same operating temperature range?

A: The KAL10FB2K50 specifies -55°C ~ 275°C, matching the original 805F2K5. The 805F2K5E does not specify an operating temperature range in available documentation.

Q: Are there dimensional constraints when selecting a substitute?

A: Yes. The 805F2K5E has minimal dimensional variation. The KAL10FB2K50 is significantly larger (0.750" L x 0.800" W vs 0.600" L x 0.646" W). PCB layout and enclosure space must be verified before selection.