Equivalent & Substitute Parts for Ohmite 45J1K2

Part Overview

The Ohmite 45J1K2 is a 1.2 kOhms ±5% 5W through-hole resistor with axial wirewound construction from the Ohmicone® 40 series. This component is currently active in production. Substitute parts are identified to provide alternative sourcing options when the primary part number becomes unavailable or when specific packaging or compliance requirements necessitate component alternatives.

Substiute Parts

45J1K2

OhmiteIn Stock: 120945J1K2 Datasheet

Current PartRFQ

45J1K2E

OhmiteIn Stock: 101745J1K2E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 45J1K2 are qualified based on electrical and mechanical parameter equivalence. The following criteria determine substitutability:

• Resistance value: 1.2 kOhms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 5W (exact match required)
• Composition: Wirewound (exact match required)
• Package: Axial through-hole (exact match required)
• Temperature coefficient: ±20ppm/°C (exact match required)
• Physical dimensions: 0.343" Dia x 0.937" L (exact match required)

The substitute part 45J1K2E meets all electrical and mechanical parameters identical to the primary part. Differences exist only in packaging configuration and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

Both the 45J1K2 and 45J1K2E are active production components from Ohmite's Ohmicone® 40 series with identical electrical and mechanical specifications. Selection between these parts depends on regulatory and compliance requirements:

• Use 45J1K2 when RoHS non-compliant components are acceptable for the application.
• Use 45J1K2E when ROHS3 compliance is required by design specifications or regulatory mandates.
• Both parts are REACH Unaffected and classified as EAR99 for export control purposes.
• Packaging differs between standard and bulk configurations; verify procurement requirements before selection.

Frequently Asked Questions (FAQ)

Q: Can 45J1K2E be used as a direct replacement for 45J1K2?

A: Yes. The 45J1K2E is electrically and mechanically equivalent to the 45J1K2. Both components have identical resistance, tolerance, power rating, composition, package type, temperature coefficient, and physical dimensions. The primary difference is RoHS compliance status and packaging configuration.

Q: What is the difference between the standard packaging and bulk packaging?

A: The 45J1K2 is supplied in standard packaging, while the 45J1K2E is supplied in bulk packaging. Both contain the same component. Bulk packaging is typically used for high-volume orders and may offer cost advantages. Verify your procurement and assembly requirements before selecting based on packaging type.

Q: Does RoHS compliance affect electrical performance?

A: No. RoHS compliance status does not alter the electrical characteristics or performance of the component. The 45J1K2E meets ROHS3 compliance through material composition changes that do not affect resistance, tolerance, power rating, or temperature coefficient specifications.

Q: Are both parts suitable for the same operating conditions?

A: Yes. Both the 45J1K2 and 45J1K2E operate within identical temperature coefficient specifications (±20ppm/°C) and are rated for the same 5W power dissipation. Physical dimensions and mounting characteristics are identical, allowing direct substitution in circuit board layouts.

Q: What export control classifications apply to these parts?

A: Both the 45J1K2 and 45J1K2E are classified as EAR99 for export control purposes and are REACH Unaffected, indicating no additional export or regulatory restrictions beyond standard commercial component handling.