Ohmite 45J1R0 1 Ohm 5W Axial Wirewound Resistor - Equivalent & Substitute Parts

Part Overview

The Ohmite 45J1R0 is a 1 Ohm, 5% tolerance, 5W through-hole axial wirewound resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision current sensing, load balancing, and power dissipation in industrial and electronic equipment. The part maintains Active product status with 1103 units in current inventory. Substitute parts are identified when packaging configurations, compliance certifications, or inventory availability require alternative sourcing while maintaining identical electrical and mechanical specifications.

Substiute Parts

45J1R0

OhmiteIn Stock: 117045J1R0 Datasheet

Current PartRFQ

45J1R0E

OhmiteIn Stock: 71245J1R0E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 45J1R0E qualifies as a parametric equivalent based on the following criteria:

• Electrical Parameters: Identical resistance value (1 Ohm), tolerance (±5%), power rating (5W), temperature coefficient (±50ppm/°C), and composition (wirewound)
• Mechanical Parameters: Identical package type (axial), physical dimensions (0.343" Dia x 0.937" L), and termination count (2)
• Functional Compatibility: Both parts operate within the same temperature range and deliver equivalent performance in circuit applications
• Differentiation: Packaging configuration (Bulk vs. standard) and compliance certifications (RoHS status) distinguish the substitute from the primary part

Parameter Comparison

Engineering Selection Recommendations

Primary Part (45J1R0): Select when standard packaging is required and RoHS non-compliant components are acceptable for the application. Inventory availability is optimal at 1103 units.

Substitute Part (45J1R0E): Select when RoHS compliance is mandated by design specifications or regulatory requirements. This variant provides identical electrical and mechanical performance with enhanced environmental compliance certification. Bulk packaging format suits high-volume production environments. Operating temperature range (-55°C ~ 275°C) is explicitly defined, providing clarity for temperature-sensitive applications.

Both parts are Active products from Ohmite and deliver equivalent circuit performance. Selection between them depends on compliance requirements and packaging logistics rather than electrical characteristics.

Frequently Asked Questions (FAQ)

Q: Are the 45J1R0 and 45J1R0E electrically interchangeable?

A: Yes. Both parts deliver identical resistance (1 Ohm), tolerance (±5%), power rating (5W), temperature coefficient (±50ppm/°C), and composition (wirewound). They are direct functional equivalents in circuit applications.

Q: What is the primary difference between these two parts?

A: The 45J1R0E is RoHS Compliant with defined operating temperature range (-55°C ~ 275°C) and bulk packaging, while the 45J1R0 is RoHS non-compliant with standard packaging. Electrical and mechanical specifications are identical.

Q: Can I use the 45J1R0E as a drop-in replacement for the 45J1R0?

A: Yes, provided your application does not require RoHS non-compliant components. The axial package, physical dimensions (0.343" Dia x 0.937" L), and all electrical parameters are identical, enabling direct board-level substitution.

Q: Does packaging format affect circuit performance?

A: No. Bulk packaging (45J1R0E) and standard packaging (45J1R0) do not affect electrical performance. Packaging format is a logistics consideration for procurement and assembly processes.

Q: Which part should I specify for new designs?

A: Specify 45J1R0E for new designs requiring RoHS compliance. Both parts are Active products; however, the 45J1R0E provides explicit operating temperature range documentation and compliance certification suitable for modern design standards.