Ohmite 45J2K7 Equivalent & Substitute Parts

Part Overview

The Ohmite 45J2K7 is a 2.7 kOhms ±5% 5W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production and maintains 1118 pieces in new original stock. The part is classified as RoHS non-compliant, which may necessitate identification of compliant alternatives for applications subject to RoHS regulations or procurement policies requiring RoHS3 compliance.

Substiute Parts

45J2K7

OhmiteIn Stock: 115945J2K7 Datasheet

Current PartRFQ

45J2K7E

OhmiteIn Stock: 108045J2K7E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 45J2K7 is determined by strict equivalence across the following critical parameters:

• Resistance value: 2.7 kOhms
• Tolerance: ±5%
• Power rating: 5W
• Composition: Wirewound
• Temperature coefficient: ±20ppm/°C
• Package configuration: Axial
• Physical dimensions: 0.343" Dia x 0.937" L (8.70mm x 23.80mm)
• Number of terminations: 2

The identified substitute, Ohmite 45J2K7E, maintains identical electrical and mechanical specifications while differing only in packaging format (bulk versus standard) and regulatory compliance status. Both parts belong to the same Ohmicone® 40 series and are manufactured by Ohmite.

Parameter Comparison

Engineering Selection Recommendations

The 45J2K7E serves as a direct parametric equivalent to the 45J2K7, with electrical and mechanical specifications identical across all critical performance parameters. The primary distinction is regulatory compliance: the 45J2K7E achieves RoHS3 compliance, whereas the 45J2K7 does not. Selection between these parts should be based on regulatory requirements applicable to the end application. Both parts maintain active production status and adequate inventory levels. The 45J2K7E is suitable for applications requiring RoHS3 compliance without any modification to circuit design or thermal management considerations.

Frequently Asked Questions (FAQ)

Q: Can the 45J2K7E replace the 45J2K7 in existing designs?

A: Yes. The 45J2K7E is electrically and mechanically equivalent. No circuit modifications are required. Both parts deliver identical resistance, tolerance, power dissipation capability, and thermal performance.

Q: What is the difference between the 45J2K7 and 45J2K7E?

A: The parts are identical in electrical and mechanical specifications. The 45J2K7E is RoHS3 compliant, while the 45J2K7 is not. The 45J2K7E is supplied in bulk packaging format.

Q: Are there any thermal or performance differences between these parts?

A: No. Both parts share identical temperature coefficient (±20ppm/°C), power rating (5W), and physical dimensions. Thermal behavior and electrical performance are equivalent.

Q: Which part should be selected for new designs?

A: Selection depends on regulatory requirements. For applications subject to RoHS3 regulations or procurement policies mandating RoHS compliance, the 45J2K7E is the appropriate choice. Both parts are in active production with sufficient inventory.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.343" diameter by 0.937" length (8.70mm x 23.80mm) in axial configuration, ensuring identical PCB footprint and mounting compatibility.