Würth Elektronik 7445620 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 7445620 is a 100 µH unshielded drum core wirewound inductor rated for 1.4 A continuous current with a maximum DC resistance of 330mOhm. This surface mount component operates across the industrial temperature range of -40°C to 125°C and is ROHS3 compliant. The part is currently active in production with 4196 units in stock. 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

7445620

Würth ElektronikIn Stock: 42977445620 Datasheet

Current PartRFQ

P0752.104NL

Pulse ElectronicsIn Stock: 2054P0752.104NL Datasheet

MFR RecommendedRFQ

SDR1005-101KL

Bourns Inc.In Stock: 3520SDR1005-101KL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 7445620 are qualified based on the following electrical and mechanical parameters:

• Inductance value: 100 µH (tolerance range ±10% to ±20% acceptable)
• Current rating: Minimum 1.0 A (primary circuit requirement)
• DC resistance: Maximum 380 mOhm (thermal and efficiency consideration)
• Shielding configuration: Unshielded (electromagnetic environment compatibility)
• Mounting type: Surface Mount (PCB assembly compatibility)
• Operating temperature range: Minimum -40°C to 125°C coverage
• RoHS compliance: ROHS3 Compliant (regulatory requirement)
• Moisture sensitivity: MSL 1 (handling and storage compatibility)

Parts meeting these criteria are functionally equivalent for circuit applications where the 7445620 is specified.

Parameter Comparison

Engineering Selection Recommendations

All three parts listed maintain ROHS3 compliance and MSL 1 moisture sensitivity classification, meeting regulatory and handling requirements. The Würth Elektronik 7445620 and Bourns Inc. SDR1005-101KL share identical inductance tolerance (±10%), core type (drum core wirewound), and physical dimensions, with the Bourns part offering a lower seated height of 5.00mm versus 5.30mm. The Pulse Electronics P0752.104NL provides a wider operating temperature range (-40°C to 130°C) but features a broader inductance tolerance (±20%) and higher maximum DC resistance (380 mOhm). Selection between these parts depends on circuit current requirements, thermal dissipation constraints, and PCB layout height restrictions.

Frequently Asked Questions (FAQ)

Q: Can the Pulse Electronics P0752.104NL replace the Würth Elektronik 7445620 in all applications?

A: The P0752.104NL is electrically equivalent for circuits operating at or below 1.2 A. Applications requiring the full 1.4 A rating of the 7445620 require verification that the lower current rating does not compromise circuit performance. The ±20% inductance tolerance of the P0752.104NL versus ±10% for the 7445620 may affect frequency-dependent circuit behavior.

Q: What are the physical compatibility considerations?

A: The Würth Elektronik 7445620 and Bourns SDR1005-101KL share identical footprints (12.70mm x 10.00mm). The Pulse Electronics P0752.104NL has a slightly larger length (12.95mm) and narrower width (9.40mm) with increased height (5.46mm). PCB layout verification is required before substitution.

Q: Are all substitute parts suitable for the same temperature range?

A: The Würth Elektronik 7445620 and Bourns SDR1005-101KL operate from -40°C to 125°C. The Pulse Electronics P0752.104NL extends to 130°C maximum. Applications requiring operation above 125°C must use the P0752.104NL.

Q: How do DC resistance differences affect circuit performance?

A: The Würth Elektronik 7445620 and Bourns SDR1005-101KL specify 330 mOhm maximum DCR. The Pulse Electronics P0752.104NL specifies 380 mOhm maximum. Higher DCR increases resistive losses and heat generation. Circuit designs with tight thermal budgets should maintain the 330 mOhm specification.

Q: What is the significance of current saturation ratings?

A: Current saturation (Isat) indicates the current level at which inductance begins to degrade. The 7445620 saturates at 1.5 A, the P0752.104NL and SDR1005-101KL at 1.2 A. Applications operating near rated current should verify that saturation margins remain adequate for the substitute part.