SDR1045-220M Equivalent & Substitute Parts

Part Overview

The SDR1045-220M is a 22 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 2.2 A continuous current with a maximum DC resistance of 145 mOhm. This component is designed for surface mount applications in circuits requiring fixed inductance values with moderate current handling capability. The part maintains active product status and is ROHS3 compliant. Substitute parts are identified when equivalent inductance values, compatible current ratings, and similar operating temperature ranges are available from alternative manufacturers, enabling design flexibility and supply chain continuity.

Substiute Parts

SDR1045-220M

Bourns Inc.In Stock: 675SDR1045-220M Datasheet

Current PartRFQ

PF0581.223NL

Pulse ElectronicsIn Stock: 3816PF0581.223NL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The PF0581.223NL from Pulse Electronics qualifies as a direct substitute based on the following critical parameters:

• Inductance Match: Both parts specify 22 µH, meeting the primary functional requirement
• Unshielded Configuration: Both components are unshielded wirewound inductors, maintaining electromagnetic compatibility characteristics
• Operating Temperature Range: Both support -40°C ~ 125°C operation, ensuring thermal compatibility
• Surface Mount Packaging: Both are surface mount devices with nonstandard package dimensions
• Compliance Alignment: Both are ROHS3 compliant and REACH unaffected, satisfying regulatory requirements
• Moisture Sensitivity: Both carry MSL 1 (Unlimited) rating

The PF0581.223NL exhibits lower current rating (1.7 A vs. 2.2 A) and reduced DC resistance (84 mOhm vs. 145 mOhm), making it suitable for applications where the SDR1045-220M's current capacity exceeds design requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the SDR1045-220M and PF0581.223NL maintain active product status and satisfy ROHS3 compliance requirements. Selection between these parts depends on circuit current requirements: the SDR1045-220M supports continuous operation at 2.2 A with saturation at 2.6 A, while the PF0581.223NL is rated for 1.7 A continuous current with saturation at 1.7 A. The PF0581.223NL offers tighter inductance tolerance (±10% vs. ±20%) and lower DC resistance (84 mOhm vs. 145 mOhm), reducing resistive losses in low-current applications. Physical dimensions differ slightly between the two parts; PCB layout and thermal management considerations may influence selection. Both components are suitable for the full operating temperature range of -40°C to 125°C.

Frequently Asked Questions (FAQ)

Q: Can PF0581.223NL replace SDR1045-220M in all applications?

A: Substitution is valid when circuit current requirements do not exceed 1.7 A continuous or 1.7 A saturation current. Applications requiring the full 2.2 A rating of the SDR1045-220M must retain the original part.

Q: What is the impact of different DC resistance values?

A: The PF0581.223NL exhibits 84 mOhm maximum DC resistance compared to 145 mOhm for the SDR1045-220M. Lower resistance reduces I²R losses and heat generation, beneficial in power-sensitive circuits. This difference becomes significant in high-current or continuous-duty applications.

Q: Are the physical dimensions compatible?

A: The SDR1045-220M measures 10.00mm × 10.00mm × 4.80mm (height), while the PF0581.223NL measures 10.32mm × 9.32mm × 4.42mm. PCB footprint and clearance requirements must be evaluated for each application.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the SDR1045-220M and PF0581.223NL are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings.

Q: Which part offers better inductance accuracy?

A: The PF0581.223NL provides ±10% tolerance compared to ±20% for the SDR1045-220M, making it suitable for applications requiring tighter inductance specifications.