Ohmite 85F1R0 Equivalent & Substitute Parts

Part Overview

The Ohmite 85F1R0 is a 1 Ohm ±1% 5W through-hole resistor with axial wirewound construction, part of the Acrasil® 80 series. This component is designed for applications requiring precision resistive elements with moderate power dissipation in compact axial packages. The part maintains active product status with 1108 units in current inventory. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to supply constraints, design flexibility, or application-specific packaging considerations.

Substiute Parts

85F1R0

OhmiteIn Stock: 118085F1R0 Datasheet

Current PartRFQ

45F1R0

OhmiteIn Stock: 87945F1R0 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 85F1R0 are qualified based on strict electrical and mechanical parameter matching:

Qualifying Parameters for Substitution:

• Resistance value: 1 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 5W (exact match required)
• Composition: Wirewound (exact match required)
• Package: Axial (exact match required)
• Temperature coefficient: ±50ppm/°C (exact match required)
• Physical dimensions: 0.343" Dia x 0.937" L / 8.70mm x 23.80mm (exact match required)
• Termination count: 2 (exact match required)

The Ohmite 45F1R0 meets all qualifying parameters and is classified as a parametric equivalent. Both parts share identical electrical specifications and mechanical form factors, differing only in series designation (Ohmicone® 40 versus Acrasil® 80).

Parameter Comparison

Engineering Selection Recommendations

Both the 85F1R0 and 45F1R0 are active products from Ohmite with identical electrical and mechanical specifications. Selection between these parts is based on availability and supply chain requirements rather than functional differences. Both parts maintain RoHS non-compliant and REACH Unaffected status, ensuring consistent regulatory treatment across designs. The 85F1R0 offers higher current inventory (1108 units) compared to the 45F1R0 (777 units), making it the primary selection when availability is not constrained. The 45F1R0 serves as a direct functional replacement when the primary part is unavailable.

Frequently Asked Questions (FAQ)

Q: Can the 45F1R0 be used as a direct replacement for the 85F1R0?

A: Yes. Both parts are wirewound axial resistors with identical resistance (1 Ohm), tolerance (±1%), power rating (5W), temperature coefficient (±50ppm/°C), and physical dimensions (0.343" Dia x 0.937" L). They are electrically and mechanically interchangeable.

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

A: The series designation indicates different product lines within Ohmite's resistor portfolio. Both series share identical electrical and mechanical parameters for these specific part numbers. The series difference does not affect functional performance or compatibility.

Q: Are there any compliance differences between these parts?

A: No. Both the 85F1R0 and 45F1R0 share identical RoHS non-compliant and REACH Unaffected status. Regulatory treatment is consistent across both parts.

Q: What is the physical footprint compatibility?

A: Both parts use identical axial packaging with dimensions of 0.343" diameter by 0.937" length (8.70mm x 23.80mm). PCB layout and mounting considerations are identical.

Q: Which part should be selected for new designs?

A: Either part is suitable for new designs. Selection should be based on current supplier availability and inventory levels. Both parts maintain active product status and are supported by Ohmite.