7445720 Equivalent & Substitute Parts Reference

Part Overview

The Würth Elektronik 7445720 is a 100 µH unshielded drum core wirewound inductor rated for 2 A continuous current with a maximum DC resistance of 202 mOhm. This surface mount component operates across the temperature range of -40°C to 125°C and is designed for applications requiring fixed inductance in compact form factors. The part is currently active in production and ROHS3 compliant. Equivalent and substitute parts are identified when alternative manufacturers offer inductors meeting the same electrical and mechanical specifications within acceptable tolerance ranges.

Substiute Parts

7445720

Würth ElektronikIn Stock: 39047445720 Datasheet

Current PartRFQ

SDR2207-101KL

Bourns Inc.In Stock: 2146SDR2207-101KL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 7445720 are qualified based on the following critical electrical and mechanical parameters:

Inductance value must be 100 µH with ±10% tolerance. Current rating must meet or exceed 2 A continuous operation. DC resistance must not exceed 202 mOhm maximum to ensure equivalent performance in power dissipation and thermal characteristics. Core material must be ferrite with unshielded configuration. Saturation current must be at least 3 A. Physical dimensions must match 22.00 mm x 15.00 mm x 7.80 mm to ensure mechanical compatibility in the same PCB footprint. Operating temperature range must span -40°C to 125°C. Mounting type must be surface mount with nonstandard package classification. RoHS3 compliance and MSL 1 rating are required for regulatory and environmental compatibility.

The Bourns SDR2207-101KL meets all substitution criteria with equivalent inductance, superior current rating (2.2 A vs. 2 A), lower DC resistance (168 mOhm vs. 202 mOhm), identical physical dimensions, matching temperature range, and equivalent compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Both the 7445720 and SDR2207-101KL are active production components with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The SDR2207-101KL offers performance advantages including higher current rating (2.2 A vs. 2 A) and lower DC resistance (168 mOhm vs. 202 mOhm), resulting in reduced power dissipation and improved thermal performance. Both parts share identical physical dimensions, operating temperature range, and inductance specifications, ensuring direct mechanical and electrical compatibility. Selection between these parts depends on design margin requirements and supply chain availability. The lower DC resistance of the SDR2207-101KL provides additional headroom for applications operating near the 2 A current limit.

Frequently Asked Questions (FAQ)

Q: Can the SDR2207-101KL directly replace the 7445720 in existing designs?

A: Yes. Both inductors share identical inductance (100 µH ±10%), saturation current (3 A), physical dimensions (22.00 mm x 15.00 mm x 7.80 mm), operating temperature range (-40°C to 125°C), and mounting type (surface mount). The SDR2207-101KL has higher current rating and lower DC resistance, making it functionally compatible and performance-equivalent.

Q: What are the key differences between these two parts?

A: The primary differences are current rating (2.2 A vs. 2 A) and DC resistance (168 mOhm vs. 202 mOhm). The SDR2207-101KL provides superior thermal performance due to lower resistance and higher current capacity. Both parts are otherwise electrically and mechanically identical.

Q: Are there any package or footprint considerations?

A: No. Both inductors use identical nonstandard surface mount packages with matching dimensions of 22.00 mm length, 15.00 mm width, and 7.80 mm height. PCB footprints are directly compatible.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 7445720 and SDR2207-101KL are ROHS3 compliant, REACH unaffected, classified as EAR99, and carry MSL 1 (unlimited) moisture sensitivity ratings. They meet identical regulatory and environmental requirements.

Q: What is the inductance test frequency for these parts?

A: Both inductors are tested at 100 kHz for inductance measurement, ensuring consistent specification across manufacturers.