PM1812-331J-RC Equivalent & Substitute Parts

Part Overview

The PM1812-331J-RC is a 330 µH unshielded inductor manufactured by Bourns Inc., rated for 85 mA with a maximum DC resistance of 14 Ohm. This surface mount component operates across the temperature range of -40°C to 100°C and is packaged in the 1812 (4532 Metric) form factor. The part maintains Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this inductor category.

Substiute Parts

PM1812-331J-RC

Bourns Inc.In Stock: 998PM1812-331J-RC Datasheet

Current PartRFQ

CM453232-331KL

Bourns Inc.In Stock: 3431CM453232-331KL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM1812-331J-RC is determined by the following critical parameters:

Inductance value must match at 330 µH. Current rating must support minimum 85 mA. DC resistance must not exceed 14 Ohm maximum. Package and case dimensions must conform to 1812 (4532 Metric) specifications. Shielding configuration must remain unshielded. Self-resonant frequency must be 4.6 MHz. Q factor at 796 kHz must be 40. RoHS3 compliance is required. Operating temperature range must encompass the -40°C to 100°C specification or extend beyond it.

The CM453232-331KL qualifies as a substitute based on matching all critical electrical parameters, identical package dimensions, equivalent shielding classification, and superior operating temperature range (-40°C to 125°C). Tolerance variance (±10% vs ±5%) and packaging format differences (Cut Tape & Digi-Reel® vs Tape & Reel) do not preclude substitution when electrical performance requirements are met.

Parameter Comparison

Engineering Selection Recommendations

Both the PM1812-331J-RC and CM453232-331KL maintain Active product status and satisfy ROHS3 compliance requirements. The CM453232-331KL provides an extended operating temperature range to 125°C, which accommodates applications requiring thermal headroom beyond the PM1812-331J-RC specification. Selection between these parts should be based on procurement availability, packaging format requirements (Tape & Reel versus Cut Tape & Digi-Reel®), and tolerance specifications appropriate to the circuit design. Both components are manufactured by Bourns Inc. and carry identical REACH and ECCN classifications.

Frequently Asked Questions (FAQ)

Q: Can the CM453232-331KL replace the PM1812-331J-RC in all applications?

A: The CM453232-331KL matches all critical electrical parameters including inductance, current rating, DC resistance, Q factor, and self-resonant frequency. Mechanical compatibility is confirmed through identical package dimensions and height specifications. The extended operating temperature range of the CM453232-331KL supports a broader thermal envelope. Substitution is valid when tolerance specifications and packaging format are acceptable to the application requirements.

Q: What is the difference in tolerance between these parts?

A: The PM1812-331J-RC specifies ±5% inductance tolerance, while the CM453232-331KL specifies ±10%. Applications requiring tighter inductance control should prioritize the PM1812-331J-RC. Applications with broader tolerance margins can utilize the CM453232-331KL without performance degradation.

Q: Are the package dimensions identical?

A: Yes. Both parts conform to the 1812 (4532 Metric) package specification with dimensions of 0.177" L x 0.126" W (4.50mm x 3.20mm) and maximum seated height of 0.134" (3.40mm). PCB layout and assembly processes require no modification when substituting between these parts.

Q: What is the difference in packaging format?

A: The PM1812-331J-RC is supplied in Tape & Reel (TR) format. The CM453232-331KL is supplied in Cut Tape (CT) & Digi-Reel® format. Packaging format selection depends on assembly equipment compatibility and procurement volume requirements. Electrical performance is independent of packaging format.

Q: Do both parts meet regulatory compliance requirements?

A: Both the PM1812-331J-RC and CM453232-331KL are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Regulatory compliance is equivalent between the two parts.