SDR1045-680M Equivalent & Substitute Parts

Part Overview

The SDR1045-680M is a 68 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 1.3 A continuous current with a maximum DC resistance of 360 mOhm. This component is designed for surface mount applications in nonstandard package configurations and is currently in active production status. Substitute parts are identified when equivalent inductance values, compatible current ratings, and similar operating temperature ranges are required for design flexibility, inventory management, or supply chain continuity.

Substiute Parts

SDR1045-680M

Bourns Inc.In Stock: 921SDR1045-680M Datasheet

Current PartRFQ

PF0581.683NL

Pulse ElectronicsIn Stock: 1248PF0581.683NL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SDR1045-680M is determined by the following criteria:

• Inductance value must be 68 µH (exact match required)
• Current rating must support minimum 930 mA continuous operation
• DC resistance must not exceed 360 mOhm maximum
• Shielding configuration must be unshielded
• Operating temperature range must encompass -40°C to 125°C
• Surface mount mounting type required
• RoHS3 compliance mandatory

The substitute part PF0581.683NL meets these criteria with equivalent inductance, lower current saturation point, and reduced DC resistance, making it suitable for applications where the main part is unavailable.

Parameter Comparison

Engineering Selection Recommendations

Both the SDR1045-680M and PF0581.683NL are active production components with ROHS3 compliance and REACH unaffected status. The main part offers higher current capacity at 1.3 A, while the substitute provides tighter inductance tolerance (±10% versus ±20%) and lower DC resistance (233 mOhm versus 360 mOhm). Selection between these parts depends on circuit current requirements: applications requiring continuous current above 930 mA necessitate the SDR1045-680M, while designs operating at or below 930 mA may utilize the PF0581.683NL for improved resistance characteristics.

Frequently Asked Questions (FAQ)

Q: Can PF0581.683NL replace SDR1045-680M in all applications?

A: Substitution is valid only for applications where continuous current does not exceed 930 mA. The SDR1045-680M is required for circuits demanding the full 1.3 A rating.

Q: What is the significance of the inductance tolerance difference?

A: The PF0581.683NL provides ±10% tolerance compared to the SDR1045-680M's ±20% tolerance. This tighter tolerance may benefit circuits with strict inductance specifications, though both parts meet the 68 µH nominal requirement.

Q: Are there physical dimension differences between these parts?

A: Yes. The SDR1045-680M measures 10.00mm × 10.00mm × 4.80mm (max height), while the PF0581.683NL measures 10.32mm × 9.32mm × 4.42mm (max height). PCB layout verification is required before substitution.

Q: Do both parts meet regulatory requirements?

A: Both components are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8504.50.4000.

Q: Which part has lower power dissipation?

A: The PF0581.683NL exhibits lower DC resistance at 233 mOhm maximum versus 360 mOhm, resulting in reduced resistive losses at equivalent current levels.