PD54R-682M Equivalent & Substitute Parts

Part Overview

The PD54R-682M is a 6.8 µH unshielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 1.6 A continuous current with a maximum DC resistance of 90 mOhm. This surface mount component operates across the temperature range of -55°C to 125°C and is ROHS3 compliant. The part is currently active in production with 860 pieces available in inventory. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this product category.

Substiute Parts

PD54R-682M

API Delevan Inc.In Stock: 917PD54R-682M Datasheet

Current PartRFQ

SDR0604-6R8ML

Bourns Inc.In Stock: 2130SDR0604-6R8ML Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The SDR0604-6R8ML from Bourns Inc. qualifies as a substitute for the PD54R-682M based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Inductance: 6.8 µH (identical)
• Inductance Tolerance: ±20% (identical)
• Current Rating: 1.6 A (identical)
• Core Material: Ferrite, Unshielded Drum Core (identical)
• Mounting Type: Surface Mount (identical)
• Operating Temperature Range: -40°C to 125°C (overlaps primary range)
• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)

Variance in DC Resistance: The SDR0604-6R8ML specifies a maximum DC resistance of 120 mOhm, compared to 90 mOhm for the PD54R-682M. This represents a 33% increase in DCR, which may impact thermal performance and power dissipation characteristics in current-limited applications.

Parameter Comparison

Engineering Selection Recommendations

Both the PD54R-682M and SDR0604-6R8ML maintain active product status and full ROHS3 compliance. The SDR0604-6R8ML offers higher saturation current (2.5 A versus 1.6 A), providing additional headroom in transient conditions. However, the increased DC resistance of the substitute part results in higher I²R losses at rated current. Selection between these parts depends on circuit requirements: the PD54R-682M is preferred where thermal dissipation must be minimized, while the SDR0604-6R8ML is suitable where saturation margin is prioritized. The operating temperature range of the PD54R-682M extends to -55°C, providing coverage for extended low-temperature applications not specified for the Bourns substitute.

Frequently Asked Questions (FAQ)

Q: Can the SDR0604-6R8ML directly replace the PD54R-682M in all applications?

A: Electrical substitution is valid for inductance value and current rating. The higher DC resistance of the SDR0604-6R8ML (120 mOhm versus 90 mOhm) increases power dissipation by approximately 78% at 1.6 A continuous current. Thermal design verification is required for applications sensitive to inductor heating.

Q: What is the impact of the different saturation current ratings?

A: The PD54R-682M saturates at 1.6 A, while the SDR0604-6R8ML saturates at 2.5 A. In circuits operating at or near the 1.6 A rating, the Bourns part provides additional margin before inductance degradation occurs.

Q: Are there mechanical compatibility concerns between these parts?

A: Both parts are surface mount, nonstandard package inductors with ferrite drum cores. Physical dimensions differ slightly: PD54R-682M measures 5.70mm × 5.11mm × 4.50mm (max height), while SDR0604-6R8ML measures 5.80mm × 5.80mm × 4.80mm (max height). PCB footprint verification is necessary before substitution.

Q: Does the operating temperature range difference affect substitution suitability?

A: The PD54R-682M operates from -55°C to 125°C, while the SDR0604-6R8ML operates from -40°C to 125°C. For applications requiring operation below -40°C, the PD54R-682M is the only qualified option from this comparison set.

Q: Are both parts equally available for procurement?

A: Inventory levels differ: PD54R-682M has 860 pieces in stock, while SDR0604-6R8ML has 2057 pieces available. Availability should be confirmed at the time of procurement.