PM75-331K-RC Equivalent & Substitute Parts

Part Overview

The PM75-331K-RC is a 330 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 400 mA continuous current with a maximum DC resistance of 1.2Ohm. This surface mount component operates across the temperature range of -40°C to 125°C and maintains active product status with full RoHS3 compliance. Substitute parts are identified when electrical specifications, mechanical dimensions, and thermal ratings align within acceptable tolerances for the intended application.

Substiute Parts

PM75-331K-RC

Bourns Inc.In Stock: 2418PM75-331K-RC Datasheet

Current PartRFQ

SDR0805-331KL

Bourns Inc.In Stock: 52250SDR0805-331KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM75-331K-RC is determined by strict alignment of the following critical parameters:

• Inductance value: 330 µH with ±10% tolerance
• Current rating: 400 mA minimum continuous rating
• Current saturation: 580 mA minimum
• DC resistance: Maximum 1.26Ohm (allowing minor variance from the 1.2Ohm specification)
• Core type: Ferrite, unshielded drum core wirewound construction
• Operating temperature range: -40°C to 125°C minimum
• Mounting: Surface mount configuration
• Physical dimensions: 0.307" diameter (7.80mm) and 0.209" maximum height (5.30mm)
• Compliance: RoHS3 and REACH status alignment

The SDR0805-331KL meets all substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the PM75-331K-RC and SDR0805-331KL are active products from Bourns Inc. with identical RoHS3 and REACH compliance certifications. The SDR0805-331KL presents a direct functional equivalent with marginally higher DC resistance (1.26Ohm versus 1.2Ohm maximum) and a slightly lower self-resonant frequency (4MHz versus 5MHz). These minor variations remain within acceptable engineering tolerances for 330 µH inductor applications at 400 mA ratings. Both components maintain identical moisture sensitivity levels, operating temperature ranges, and physical footprints suitable for surface mount assembly. Selection between these parts should be based on availability, lead time, and inventory status rather than electrical performance differentiation.

Frequently Asked Questions (FAQ)

Q: Can the SDR0805-331KL replace the PM75-331K-RC in existing designs?

A: Yes. Both inductors share identical inductance values, current ratings, saturation currents, operating temperature ranges, and physical dimensions. The DC resistance variance of 0.06Ohm and self-resonant frequency difference of 1MHz fall within acceptable substitution parameters for this component category.

Q: Are there any compliance differences between these parts?

A: No. Both parts maintain identical RoHS3 compliance, REACH unaffected status, and MSL Level 1 ratings. Regulatory and environmental certifications are equivalent.

Q: What is the significance of the DC resistance difference?

A: The SDR0805-331KL exhibits a maximum DC resistance of 1.26Ohm compared to the PM75-331K-RC at 1.2Ohm maximum. This 5% variance results in marginally higher power dissipation under identical current conditions. For applications where thermal performance is critical, the lower resistance of the PM75-331K-RC may be preferred, though both operate within the same temperature range.

Q: Do these parts have identical physical footprints?

A: Yes. Both components measure 0.307" (7.80mm) in diameter or length/width and 0.209" (5.30mm) maximum seated height. They are compatible with identical PCB layouts and assembly processes.

Q: What is the difference in self-resonant frequency?

A: The PM75-331K-RC has a self-resonant frequency of 5MHz, while the SDR0805-331KL is rated at 4MHz. This 1MHz difference may affect performance in high-frequency applications above 4MHz. For DC and low-frequency applications, this parameter is not a limiting factor.

Q: Are both parts available in the same packaging format?

A: Yes. Both the PM75-331K-RC and SDR0805-331KL are supplied in Tape & Reel (TR) packaging suitable for automated assembly processes.