Equivalent & Substitute Parts for 85F20K

Part Overview

The 85F20K is a 20 kOhms ±1% 5W through-hole resistor manufactured by Ohmite in the Acrasil® 80 series. This axial wirewound resistor is designed for applications requiring precision resistance values with moderate power dissipation in a compact form factor. The part is currently active in production with 662 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to inventory constraints, supply chain considerations, or specific application requirements.

Substiute Parts

85F20K

OhmiteIn Stock: 69885F20K Datasheet

Current PartRFQ

45F20KE

OhmiteIn Stock: 128245F20KE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 45F20KE is identified as a parametric equivalent to the 85F20K based on the following criteria:

• Identical resistance value: 20 kOhms
• Identical tolerance: ±1%
• Identical power rating: 5W
• Identical composition: Wirewound
• Identical package type: Axial
• Identical temperature coefficient: ±20ppm/°C
• Identical physical dimensions: 0.343" Dia x 0.937" L (8.70mm x 23.80mm)
• Identical number of terminations: 2

Both parts meet the core electrical and mechanical requirements for direct substitution in applications where the 85F20K is specified.

Parameter Comparison

Engineering Selection Recommendations

Both the 85F20K and 45F20KE are electrically and mechanically equivalent for applications requiring a 20 kOhms ±1% 5W axial wirewound resistor. Selection between these parts should be based on the following factors:

The 45F20KE offers ROHS3 compliance, making it suitable for applications subject to RoHS regulations. The 85F20K is RoHS non-compliant and should be selected only when RoHS compliance is not a requirement. Both parts are manufactured by Ohmite and maintain identical electrical performance characteristics. The 45F20KE has higher inventory availability at 1233 units compared to 662 units for the 85F20K, which may influence lead time considerations.

Frequently Asked Questions (FAQ)

Q: Can the 45F20KE be used as a direct replacement for the 85F20K?

A: Yes. Both parts share identical electrical specifications (20 kOhms ±1%, 5W, ±20ppm/°C) and mechanical dimensions (0.343" Dia x 0.937" L). The primary difference is RoHS compliance status and series designation.

Q: What is the difference between the Acrasil® 80 and Ohmicone® 40 series?

A: Both are Ohmite wirewound resistor series with identical electrical and physical parameters for this 20 kOhms 5W specification. Series designation reflects different product lines within Ohmite's portfolio but does not affect functional equivalence for this application.

Q: Are there any compliance considerations when substituting these parts?

A: The 45F20KE is ROHS3 compliant while the 85F20K is RoHS non-compliant. Applications requiring RoHS compliance must use the 45F20KE. Both parts are REACH Unaffected and classified as EAR99 for export control purposes.

Q: Do these parts have identical physical dimensions for PCB layout?

A: Yes. Both parts have identical dimensions of 0.343" Dia x 0.937" L (8.70mm x 23.80mm) and are packaged as axial components with 2 terminations, ensuring identical footprint compatibility.