Equivalent & Substitute Parts for Ohmite 12FR020

Part Overview

The Ohmite 12FR020 is a 20 milliohm, ±1% tolerance, 2-watt axial through-hole resistor designed for current sensing applications. Featuring a non-inductive metal element construction, this component operates across a temperature range of -55°C to 275°C with a temperature coefficient of ±50 ppm/°C. The part is currently active in production. Substitute parts may be required due to packaging preferences, compliance requirements, or inventory availability across different distribution channels.

Substiute Parts

12FR020

OhmiteIn Stock: 91012FR020 Datasheet

Current PartRFQ

12FR020E

OhmiteIn Stock: 123012FR020E Datasheet

Parametric EquivalentRFQ

12FR020E

OhmiteIn Stock: 123012FR020E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 12FR020 is determined by strict equivalence across the following critical parameters:

• Resistance value: 20 mOhms
• Tolerance: ±1%
• Power rating: 2W
• Composition: Metal Element
• Features: Current Sense, Non-Inductive
• Temperature coefficient: ±50 ppm/°C
• Operating temperature range: -55°C to 275°C
• Package type: Axial
• Physical dimensions: 0.094" Dia × 0.417" L (2.40 mm × 10.60 mm)
• Number of terminations: 2

The 12FR020E is a parametric equivalent that maintains all electrical and mechanical specifications while differing in packaging configuration and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the 12FR020 and 12FR020E are active production parts from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on the following criteria:

The 12FR020E is RoHS compliant and carries an MSL rating of 1 (Unlimited), making it suitable for applications requiring regulatory compliance with environmental directives. The 12FR020 is RoHS non-compliant and carries no MSL designation.

For new designs or applications with RoHS compliance requirements, the 12FR020E is the appropriate selection. For legacy systems or applications without compliance constraints, either part is electrically and mechanically interchangeable. Packaging differences (standard versus bulk) may influence procurement decisions based on order quantity and inventory management requirements.

Frequently Asked Questions (FAQ)

Q: Are the 12FR020 and 12FR020E electrically identical?

A: Yes. Both parts share identical resistance (20 mOhms), tolerance (±1%), power rating (2W), temperature coefficient (±50 ppm/°C), and operating temperature range (-55°C to 275°C).

Q: What is the difference between these parts?

A: The primary differences are packaging configuration (standard versus bulk), RoHS compliance status, and moisture sensitivity level designation. Electrical and mechanical specifications are equivalent.

Q: Can I substitute the 12FR020E for the 12FR020 in existing designs?

A: Yes. The 12FR020E is a direct parametric equivalent with identical axial package dimensions and all electrical characteristics. Physical board layout and mechanical mounting requirements remain unchanged.

Q: Which part should I specify for new designs?

A: For applications requiring RoHS compliance, specify the 12FR020E. Both parts are active production items and available from Ohmite.

Q: Are there any temperature or environmental limitations that differ between these parts?

A: No. Both parts operate identically across the -55°C to 275°C temperature range with the same ±50 ppm/°C temperature coefficient.

Q: What does the packaging difference mean for procurement?

A: The 12FR020 is supplied in standard packaging, while the 12FR020E is supplied in bulk packaging. This distinction typically affects minimum order quantities and unit pricing but does not impact component performance or compatibility.