Würth Elektronik 744355256 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744355256 is a 560 nH shielded wirewound inductor rated for 20 A continuous current with a DC resistance of 1.61 mOhm. This component is part of the WE-HCI series and is designed for surface mount applications requiring low inductance values with high current handling capability. The part maintains active product status and is AEC-Q200 rated for automotive applications. Substitute parts are identified when equivalent electrical performance can be achieved within the allowed parameter tolerances for inductance, current rating, and DC resistance specifications.

Key Parameters

Parameter	Value	Unit
Inductance	560	nH
Inductance Tolerance	±20%	-
Current Rating	20	A
Current - Saturation (Isat)	30	A
DC Resistance (DCR)	1.61	mOhm
Shielding	Shielded	-
Mounting Type	Surface Mount	-
Operating Temperature Range	-40°C to 155°C	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the Würth Elektronik 744355256 are qualified based on the following electrical and mechanical criteria:

Inductance values must fall within the tolerance band of the main part (560 nH ±20%, or 448–672 nH). The Pulse Electronics PG0255.601NL operates at 600 nH, which is within this acceptable range.

Current rating must meet or exceed the main part specification of 20 A continuous. The substitute part is rated for 27 A, exceeding the requirement.

DC resistance must remain comparable to support equivalent thermal and power dissipation characteristics. The substitute part specifies 1.87 mOhm maximum, which is within acceptable engineering margins for this component class.

Shielding type must match (shielded configuration required for both parts).

Surface mount packaging and nonstandard case dimensions are acceptable provided mechanical fit is verified in the application.

Operating temperature range, RoHS compliance, and REACH status must be compatible with the application environment.

Parameter Comparison

Parameter	Würth Elektronik 744355256	Pulse Electronics PG0255.601NL	Compatibility
Inductance	560 nH	600 nH	Within ±20% tolerance band
Inductance Tolerance	±20%	±15%	Substitute tighter tolerance
Current Rating	20 A	27 A	Substitute exceeds requirement
Current - Saturation (Isat)	30 A	28 A	Comparable saturation performance
DC Resistance (DCR)	1.61 mOhm	1.87 mOhm Max	Within acceptable margin
Shielding	Shielded	Shielded	Matched configuration
Mounting Type	Surface Mount	Surface Mount	Compatible
Operating Temperature Range	-40°C to 155°C	-40°C to 125°C	Substitute range narrower; verify application requirements
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Matched compliance
REACH Status	REACH Unaffected	REACH Unaffected	Matched compliance
Size / Dimension	10.50mm L x 10.20mm W	11.50mm L x 10.30mm W	Verify PCB layout clearance
Height - Seated (Max)	4.20mm	4.00mm	Substitute lower profile

Engineering Selection Recommendations

The Pulse Electronics PG0255.601NL qualifies as a substitute for the Würth Elektronik 744355256 based on electrical parameter compatibility and regulatory compliance. Both components are ROHS3 compliant and REACH unaffected, meeting standard industrial and automotive supply chain requirements.

The substitute part provides higher current rating (27 A versus 20 A) and tighter inductance tolerance (±15% versus ±20%), which may offer performance advantages in applications with margin requirements. The DC resistance differential (1.87 mOhm maximum versus 1.61 mOhm) is within acceptable engineering tolerances for this component class.

The operating temperature range of the substitute part extends to 125°C maximum, compared to 155°C for the main part. Applications requiring operation above 125°C must use the original Würth Elektronik part.

Physical dimensions differ slightly (11.50mm L x 10.30mm W versus 10.50mm L x 10.20mm W). PCB layout and mechanical clearance must be verified before substitution.

Frequently Asked Questions (FAQ)

Q: Can the Pulse Electronics PG0255.601NL be used as a direct replacement for the Würth Elektronik 744355256?

A: The Pulse Electronics part is electrically compatible within the specified tolerance bands for inductance, current rating, and DC resistance. Physical dimensions differ slightly, requiring verification of PCB layout clearance. Operating temperature range is narrower (125°C maximum versus 155°C), which must be evaluated against application requirements.

Q: What is the inductance tolerance difference between these parts?

A: The main part specifies ±20% tolerance, while the substitute specifies ±15%. The substitute's tighter tolerance may provide improved circuit performance in applications sensitive to inductance variation.

Q: Are both parts suitable for automotive applications?

A: The Würth Elektronik 744355256 carries AEC-Q200 rating for automotive use. The Pulse Electronics PG0255.601NL does not list AEC-Q200 certification in the provided specifications. Automotive applications must verify compliance requirements with the component supplier.

Q: What is the maximum operating temperature for each part?

A: The Würth Elektronik 744355256 operates from -40°C to 155°C. The Pulse Electronics PG0255.601NL operates from -40°C to 125°C. Applications requiring operation above 125°C must use the original Würth Elektronik part.

Q: How do the physical dimensions affect substitution?

A: The Würth Elektronik part measures 10.50mm L x 10.20mm W x 4.20mm H. The Pulse Electronics part measures 11.50mm L x 10.30mm W x 4.00mm H. The substitute is slightly larger in length and width but lower in height. PCB layout, component spacing, and mechanical clearance must be verified before substitution.

Q: Are both parts RoHS and REACH compliant?

A: Both parts are ROHS3 compliant and REACH unaffected, meeting standard regulatory requirements for industrial and commercial applications.

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