Ohmite 45J12R 12 Ohm 5W Axial Wirewound Resistor Equivalent & Substitute Parts

Part Overview

The Ohmite 45J12R is a 12 Ohm, 5% tolerance, 5W through-hole axial wirewound resistor from the Ohmicone® 40 series. This component is currently active in production with 994 units in stock. Equivalent and substitute parts are identified when identical electrical specifications and mechanical compatibility are maintained across the same product category. Alternative part numbers may be required due to inventory availability, regional sourcing constraints, or specific compliance requirements.

Substiute Parts

45J12R

OhmiteIn Stock: 106045J12R Datasheet

Current PartRFQ

45J12RE

OhmiteIn Stock: 73345J12RE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 45J12R are identified based on strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

• Resistance value: 12 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 5W (exact match required)
• Composition: Wirewound (exact match required)
• Package: Axial (exact match required)
• Temperature coefficient: ±20ppm/°C (exact match required)
• Physical dimensions: 0.343" Dia x 0.937" L (exact match required)

The Ohmite 45J12RE meets all substitution criteria and is classified as a parametric equivalent. Both parts share identical electrical performance and mechanical form factor, ensuring direct interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the 45J12R and 45J12RE are active production components from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on the following factors:

RoHS Compliance: The 45J12R is RoHS non-compliant, while the 45J12RE is RoHS compliant. Applications requiring RoHS compliance must use the 45J12RE.

Moisture Sensitivity: The 45J12RE carries an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. The 45J12R does not specify MSL classification.

Operating Temperature Range: The 45J12RE specifies an operating temperature range of -55°C to 275°C. The 45J12R does not provide an explicit operating temperature specification.

Inventory Availability: The 45J12R has 994 units in stock, while the 45J12RE has 680 units available. Selection may depend on required delivery quantities.

For applications without RoHS requirements and where operating temperature specifications are not critical, either part is electrically and mechanically interchangeable. For regulated or compliance-sensitive applications, the 45J12RE is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can the 45J12RE be used as a direct replacement for the 45J12R?

A: Yes. Both parts are identical in resistance value (12 Ohms), tolerance (±5%), power rating (5W), composition (wirewound), package type (axial), and physical dimensions (0.343" Dia x 0.937" L). They are electrically and mechanically interchangeable. Selection should be based on compliance requirements and operating environment specifications.

Q: What is the difference between the 45J12R and 45J12RE?

A: The primary differences are RoHS compliance status, moisture sensitivity level classification, and specified operating temperature range. The 45J12RE is RoHS compliant with an MSL rating of 1 and an operating temperature range of -55°C to 275°C. The 45J12R is RoHS non-compliant and does not specify these parameters.

Q: Are these parts suitable for high-temperature applications?

A: The 45J12RE specifies an operating temperature range of -55°C to 275°C. The 45J12R does not provide an explicit operating temperature specification. For applications requiring confirmed high-temperature operation, the 45J12RE is the recommended selection.

Q: Do these resistors require special handling for moisture?

A: The 45J12RE carries an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions and no special storage or handling requirements. The 45J12R does not specify an MSL classification.

Q: Can these parts be used in regulated or compliance-sensitive applications?

A: The 45J12RE is RoHS compliant and suitable for regulated applications requiring RoHS certification. The 45J12R is RoHS non-compliant and should not be used in applications with RoHS compliance mandates.