Ohmite 85FR15 Equivalent & Substitute Parts

Part Overview

The Ohmite 85FR15 is a 150 mOhms ±1% 5W through-hole resistor with axial wirewound construction, part of the Acrasil® 80 series. This component is designed for applications requiring low-resistance, high-power dissipation in a compact axial package. The part maintains active product status with 819 units in current inventory. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to availability constraints, packaging preferences, or compliance requirements.

Substiute Parts

85FR15

OhmiteIn Stock: 87485FR15 Datasheet

Current PartRFQ

45FR15E

OhmiteIn Stock: 93445FR15E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Ohmite 45FR15E qualifies as a parametric equivalent to the 85FR15 based on the following critical substitution criteria:

• Electrical Parameters: Identical resistance value (150 mOhms) and tolerance (±1%)
• Power Rating: Matching 5W dissipation capability
• Construction: Wirewound composition with identical temperature coefficient (±90ppm/°C)
• Package Geometry: Identical axial package with matching physical dimensions (0.343" Dia x 0.937" L)
• Termination Count: Both parts feature 2 terminations for direct pin compatibility

The 45FR15E represents the same functional specification within the Ohmite product portfolio, with differences limited to series designation (40 series vs. Acrasil® 80) and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the 85FR15 and 45FR15E are active Ohmite products with identical electrical and mechanical specifications. Selection between these parts should be based on the following factors:

85FR15 Selection: Choose when RoHS non-compliant components are acceptable for the application and when the Acrasil® 80 series designation is specified in design documentation.

45FR15E Selection: Choose when RoHS compliance is required for the end application or when bulk packaging is preferred. The 45FR15E provides documented operating temperature range (-55°C ~ 275°C), which may be beneficial for thermal design verification in temperature-critical applications.

Both parts are suitable for direct substitution in axial wirewound resistor applications requiring 150 mOhms at 5W with ±1% tolerance.

Frequently Asked Questions (FAQ)

Q: Can the 45FR15E replace the 85FR15 in existing designs? A: Yes. Both parts share identical electrical parameters (150 mOhms, ±1%, 5W), wirewound construction, temperature coefficient (±90ppm/°C), and axial package geometry (0.343" Dia x 0.937" L). Direct substitution is electrically and mechanically compatible.

Q: What is the primary difference between these two parts? A: The main differences are RoHS compliance status (45FR15E is RoHS Compliant; 85FR15 is non-compliant) and series designation (40 series vs. Acrasil® 80). Electrical and mechanical specifications are identical.

Q: Does the 45FR15E have a specified operating temperature range? A: Yes. The 45FR15E is rated for -55°C ~ 275°C operation. The 85FR15 does not have a published operating temperature range in the provided specifications.

Q: Are the physical dimensions identical? A: Yes. Both parts measure 0.343" diameter by 0.937" length (8.70mm x 23.80mm) and feature identical axial package geometry with 2 terminations.

Q: Which part should be selected for new designs? A: Selection depends on compliance requirements. For RoHS-compliant applications, specify the 45FR15E. For applications without RoHS requirements, either part is suitable based on series availability and inventory status.