Ohmite 91J51R Equivalent & Substitute Parts

Part Overview

The Ohmite 91J51R is a 51 Ohm, 1.5W wirewound axial resistor with ±5% tolerance and flame retardant coating. This component is designed for through-hole applications requiring reliable power dissipation and safety features in electronic circuits. The part is currently in active production status. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to inventory constraints, packaging preferences, or compliance requirements.

Substiute Parts

91J51R

OhmiteIn Stock: 93691J51R Datasheet

Current PartRFQ

91J51RE

OhmiteIn Stock: 102691J51RE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Ohmite 91J51RE is classified as a parametric equivalent to the 91J51R. Substitution is valid based on the following criteria:

• Identical resistance value: 51 Ohms
• Identical tolerance: ±5%
• Identical power rating: 1.5W
• Identical composition: Wirewound
• Identical package type: Axial
• Identical temperature coefficient: ±30ppm/°C
• Identical physical dimensions: 0.142" Dia x 0.453" L (3.60mm x 11.50mm)
• Identical number of terminations: 2
• Identical features: Flame Retardant Coating, Safety

The primary difference between these parts is packaging format (Bulk for 91J51RE versus standard for 91J51R) and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

Both the 91J51R and 91J51RE are active production components from Ohmite's Series 90 wirewound resistor line. Selection between these parts should be based on the following factors:

91J51R is appropriate for applications where RoHS non-compliant components are acceptable and standard packaging is required.

91J51RE is appropriate for applications requiring ROHS3 compliance or bulk packaging formats. This part offers improved environmental compliance status while maintaining identical electrical and mechanical specifications.

Both parts are suitable for direct substitution in through-hole circuit designs requiring 51 Ohm, 1.5W wirewound resistors with flame retardant coating and safety features.

Frequently Asked Questions (FAQ)

Q: Can the 91J51RE replace the 91J51R in existing designs?

A: Yes. The 91J51RE is electrically and mechanically equivalent to the 91J51R. All critical parameters including resistance value, tolerance, power rating, temperature coefficient, and physical dimensions are identical. Direct substitution is valid for through-hole PCB applications.

Q: What is the difference between these two parts?

A: The primary differences are packaging format and RoHS compliance status. The 91J51RE is supplied in bulk packaging and is ROHS3 compliant, while the 91J51R uses standard packaging and is RoHS non-compliant. Electrical performance and physical dimensions are identical.

Q: Are there any compatibility concerns when substituting the 91J51RE for the 91J51R?

A: No compatibility concerns exist. Both parts are axial wirewound resistors with identical dimensions (0.142" Dia x 0.453" L), termination count (2), and mounting requirements. PCB layouts and circuit designs require no modification.

Q: Which part should I select for new designs?

A: Selection depends on regulatory and compliance requirements. For applications requiring ROHS3 compliance, specify the 91J51RE. For applications without RoHS requirements, either part is acceptable based on packaging and inventory availability.

Q: Are both parts currently available?

A: Yes. The 91J51R has 844 pieces in stock, and the 91J51RE has 920 pieces in stock as new original inventory.