Ohmite 43J120 120 Ohm 3W Axial Wirewound Resistor - Equivalent & Substitute Parts

Part Overview

The Ohmite 43J120 is a 120 Ohm, 3W axial wirewound resistor designed for through-hole applications. This component is part of the Ohmicone® 40 series and maintains active product status. Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating, temperature coefficient) and mechanical compatibility (axial package, physical dimensions, termination count). Alternative part numbers may be required due to packaging format differences, inventory availability, or compliance requirement variations.

Substiute Parts

43J120

OhmiteIn Stock: 105643J120 Datasheet

Current PartRFQ

43J120E

OhmiteIn Stock: 109243J120E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Ohmite 43J120 are identified through strict parametric matching. The following electrical and mechanical criteria determine substitution eligibility:

Critical Matching Parameters:

• Resistance value: 120 Ohms
• Tolerance: ±5%
• Power rating: 3W
• Composition: Wirewound
• Temperature coefficient: ±20ppm/°C
• Package configuration: Axial
• Physical dimensions: 0.220" Dia x 0.594" L (5.60mm x 15.10mm)
• Termination count: 2

The 43J120E is classified as a parametric equivalent based on identical electrical specifications and mechanical compatibility. Differences exist only in packaging format (Bulk vs. standard packaging), product compliance certifications, and operating temperature range specification.

Parameter Comparison

Engineering Selection Recommendations

Both the 43J120 and 43J120E are electrically and mechanically equivalent for circuit applications requiring a 120 Ohm, 3W axial wirewound resistor. Selection between these parts is determined by compliance and regulatory requirements:

43J120: Select this part number when RoHS non-compliant components are acceptable for the application. Standard packaging format is available.

43J120E: Select this part number for applications requiring RoHS compliance. This variant is supplied in Bulk packaging and includes explicit operating temperature range specification (-55°C ~ 275°C). Moisture sensitivity level is defined as MSL 1 (Unlimited).

Both parts maintain active product status and are available in inventory. The choice between these equivalents depends solely on regulatory compliance requirements and packaging format needs for your specific application.

Frequently Asked Questions (FAQ)

Q: Can 43J120E be used as a direct replacement for 43J120?

A: Yes. The 43J120E is electrically and mechanically equivalent to the 43J120. Both components have identical resistance (120 Ohms), tolerance (±5%), power rating (3W), temperature coefficient (±20ppm/°C), and physical dimensions (0.220" Dia x 0.594" L). The primary differences are packaging format and RoHS compliance status.

Q: What is the difference between 43J120 and 43J120E?

A: The 43J120E differs in three aspects: (1) Packaging format is Bulk rather than standard; (2) RoHS Compliant status versus RoHS non-compliant; (3) Operating temperature range is explicitly specified as -55°C ~ 275°C for the 43J120E. Electrical and mechanical specifications are identical.

Q: Are these parts suitable for high-temperature applications?

A: The 43J120E specifies an operating temperature range of -55°C ~ 275°C. The 43J120 does not provide an explicit operating temperature range specification. For applications requiring confirmed high-temperature operation, the 43J120E is the appropriate selection.

Q: Do these resistors require special handling for moisture?

A: The 43J120E has a Moisture Sensitivity Level (MSL) of 1 (Unlimited), indicating no moisture sensitivity restrictions. The 43J120 lists MSL as Not Applicable. Standard handling procedures for through-hole resistors apply to both parts.

Q: Which part should I select for a new design?

A: For new designs, the 43J120E is recommended when RoHS compliance is required. Both parts are active products with available inventory. Selection should be based on your application's regulatory compliance requirements and packaging needs.