45J33R Equivalent & Substitute Parts

Part Overview

The Ohmite 45J33R is a 33 Ohm, 5% tolerance, 5W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision power dissipation in compact form factors. The part maintains active product status with 746 units currently in stock. Identifying equivalent and substitute parts is essential for supply chain continuity, design flexibility, and procurement optimization when the primary part number becomes unavailable or when alternative packaging configurations are required.

Substiute Parts

45J33R

OhmiteIn Stock: 77145J33R Datasheet

Current PartRFQ

45J33RE

OhmiteIn Stock: 106245J33RE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 45J33R are identified based on strict parametric equivalence within the Ohmicone® 40 series. The substitution criteria are:

• Resistance value: 33 Ohms (exact match)
• Tolerance: ±5% (exact match)
• Power rating: 5W (exact match)
• Composition: Wirewound (exact match)
• Package configuration: Axial (exact match)
• Temperature coefficient: ±20ppm/°C (exact match)
• Physical dimensions: 0.343" Dia x 0.937" L (exact match)
• Number of terminations: 2 (exact match)

The 45J33RE qualifies as a parametric equivalent substitute. The primary distinction between these parts is packaging configuration: the 45J33R is supplied in standard packaging, while the 45J33RE is supplied in bulk packaging. Both parts share identical electrical and mechanical specifications, ensuring direct functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the 45J33R and 45J33RE are active products from Ohmite's Ohmicone® 40 series with identical electrical and mechanical specifications. Selection between these parts should be based on the following criteria:

45J33R is appropriate for applications where standard packaging is specified or preferred, and where RoHS non-compliant components are acceptable within the design framework.

45J33RE is the preferred selection for applications requiring ROHS3 compliance. This substitute provides superior regulatory alignment while maintaining complete parametric equivalence. The bulk packaging configuration of the 45J33RE may offer cost advantages for high-volume procurement scenarios.

Both parts are suitable for direct substitution in circuit designs without modification to PCB layouts, schematic designs, or thermal management strategies, provided the application requirements align with the specified electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

Q: Can the 45J33RE be used as a direct replacement for the 45J33R in existing designs?

A: Yes. The 45J33RE is a parametric equivalent with identical resistance, tolerance, power rating, composition, package type, temperature coefficient, and physical dimensions. Direct substitution is possible without circuit redesign or PCB layout modification.

Q: What is the primary difference between the 45J33R and 45J33RE?

A: The primary differences are packaging configuration (standard versus bulk) and RoHS compliance status. The 45J33R is RoHS non-compliant, while the 45J33RE is ROHS3 compliant. All electrical and mechanical specifications are identical.

Q: Are there any thermal or performance differences between these parts?

A: No. Both parts share identical power ratings (5W), temperature coefficients (±20ppm/°C), and physical dimensions. Thermal performance and electrical behavior are equivalent.

Q: Which part should be selected for new designs?

A: The 45J33RE is recommended for new designs due to ROHS3 compliance, which aligns with current regulatory requirements and industry standards. The part maintains full parametric equivalence to the 45J33R while offering improved compliance status.

Q: Does packaging configuration affect circuit performance?

A: No. Packaging configuration (standard versus bulk) affects only procurement, handling, and inventory management. Circuit performance, electrical characteristics, and mechanical fit remain unchanged.

Q: Are both parts available in equivalent quantities?

A: Current inventory shows 746 units of the 45J33R and 1036 units of the 45J33RE in stock, providing flexibility for procurement planning and supply chain management.