Ohmite 45J50R Equivalent & Substitute Parts

Part Overview

The Ohmite 45J50R is a 50 Ohm, 5% tolerance, 5W through-hole axial wirewound resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision power dissipation in compact form factors. The part 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

45J50R

OhmiteIn Stock: 79145J50R Datasheet

Current PartRFQ

45J50RE

OhmiteIn Stock: 106945J50RE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 45J50RE is identified as a parametric equivalent to the 45J50R based on matching electrical and mechanical specifications. Substitution eligibility is determined by the following criteria:

• Resistance value: 50 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 5W (exact match required)
• Composition: Wirewound (exact match required)
• Package configuration: Axial (exact match required)
• Temperature coefficient: ±20ppm/°C (exact match required)
• Physical dimensions: 0.343" Dia x 0.937" L / 8.70mm x 23.80mm (exact match required)
• Number of terminations: 2 (exact match required)

Both parts satisfy these criteria and are therefore electrically and mechanically interchangeable.

Parameter Comparison

Engineering Selection Recommendations

Both the 45J50R and 45J50RE are active production parts from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on the following factors:

The 45J50RE offers RoHS compliance, making it suitable for applications subject to RoHS regulations or customer requirements. The 45J50R is RoHS non-compliant and should be selected only when RoHS compliance is not a requirement.

Packaging differences exist: the 45J50R is supplied in tape and reel format, while the 45J50RE is supplied in bulk packaging. Procurement volume and assembly process requirements should guide packaging selection.

Both parts carry the same ECCN classification (EAR99) and are suitable for equivalent applications requiring 50 Ohm, 5W axial wirewound resistors.

Frequently Asked Questions (FAQ)

Q: Are the 45J50R and 45J50RE electrically identical?

A: Yes. Both parts have identical resistance (50 Ohms), tolerance (±5%), power rating (5W), temperature coefficient (±20ppm/°C), and composition (wirewound). They are electrically interchangeable.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.343" diameter by 0.937" length (8.70mm x 23.80mm) and use identical axial packaging with 2 terminations. They are mechanically interchangeable.

Q: What is the primary difference between these parts?

A: The main differences are RoHS compliance status and packaging format. The 45J50RE is RoHS compliant and supplied in bulk, while the 45J50R is RoHS non-compliant and supplied in tape and reel format.

Q: Which part should I select for a RoHS-regulated application?

A: The 45J50RE is RoHS compliant and is the appropriate selection for applications subject to RoHS requirements.

Q: Can I use these parts interchangeably on the same PCB assembly?

A: Yes, provided that your application does not have specific RoHS compliance requirements. Both parts have identical electrical performance and physical dimensions, making them suitable for direct substitution in the same circuit design.

Q: What is the moisture sensitivity level difference?

A: The 45J50R lists moisture sensitivity as not applicable, while the 45J50RE is rated MSL 1 (unlimited). This indicates the 45J50RE can be stored indefinitely without moisture control measures.