Würth Elektronik 744031010 Fixed Inductor Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744031010 is a 1 µH shielded drum core wirewound inductor rated for 2 A continuous current with a maximum DC resistance of 37 mOhm. This component is designed for surface mount applications requiring compact form factor and electromagnetic shielding. The part is currently active in production and ROHS3 compliant. Substitute parts are identified when the original part becomes unavailable, when inventory constraints require alternative sourcing, or when application requirements permit operation within the electrical and mechanical tolerances of qualified alternatives.

Substiute Parts

744031010

Würth ElektronikIn Stock: 1958744031010 Datasheet

Current PartRFQ

PG0085.102NL

Pulse ElectronicsIn Stock: 2808PG0085.102NL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Würth Elektronik 744031010 is determined by the following critical parameters:

• Inductance Value: Must be 1 µH to maintain circuit function
• Current Rating: Substitute must support minimum 2 A continuous current
• DC Resistance: Substitute DCR must not exceed 37 mOhm to maintain thermal and efficiency characteristics
• Saturation Current: Substitute Isat must be at least 1.6 A
• Shielding: Substitute must be shielded to prevent electromagnetic interference
• Surface Mount Compatibility: Substitute must be surface mount technology
• Compliance: Substitute must maintain ROHS3 compliance and MSL 1 rating

The Pulse Electronics PG0085.102NL meets the inductance, shielding, mounting, and compliance requirements. However, the current rating of 1.5 A and saturation current of 1.5 A are below the main part specification, and the DC resistance of 33 mOhm is lower. This substitute is suitable only for applications where the actual circuit current demand does not exceed 1.5 A.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 744031010 and Pulse Electronics PG0085.102NL are active production components with ROHS3 compliance and MSL 1 ratings, ensuring regulatory compliance and moisture handling compatibility.

The Würth Elektronik 744031010 is the primary selection for applications requiring the full 2 A current rating and 1.6 A saturation current specification. The part's 37 mOhm maximum DC resistance and shielded construction provide specified thermal and electromagnetic performance.

The Pulse Electronics PG0085.102NL is a qualified substitute for applications where circuit current demand does not exceed 1.5 A. The substitute offers improved inductance tolerance (±20% versus ±30%) and lower DC resistance (33 mOhm), which may provide marginal thermal benefits in current-limited applications. The substitute's larger footprint (4.30mm x 4.30mm versus 3.80mm x 3.80mm) must be evaluated against PCB layout constraints. Both parts maintain identical seated height of 1.80mm.

Frequently Asked Questions (FAQ)

Q: Can the Pulse Electronics PG0085.102NL be used as a direct replacement for the Würth Elektronik 744031010?

A: The Pulse Electronics part is electrically compatible for inductance value and shielding requirements. However, the current rating of 1.5 A and saturation current of 1.5 A are lower than the main part's 2 A and 1.6 A specifications. Substitution is valid only when circuit analysis confirms that actual operating current does not exceed 1.5 A.

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

A: The primary differences are current rating (2 A versus 1.5 A), saturation current (1.6 A versus 1.5 A), inductance tolerance (±30% versus ±20%), and physical footprint (3.80mm x 3.80mm versus 4.30mm x 4.30mm). Both parts share identical 1.80mm seated height, shielding, surface mount technology, and compliance certifications.

Q: Does the footprint difference affect PCB layout compatibility?

A: The Pulse Electronics part requires a larger PCB footprint (4.30mm x 4.30mm) compared to the Würth Elektronik part (3.80mm x 3.80mm). PCB layout must accommodate this 0.50mm increase in both length and width dimensions. Seated height remains identical at 1.80mm for both parts.

Q: Are both parts suitable for high-temperature applications?

A: Both parts operate across the -40°C to 125°C range (Würth Elektronik) and -40°C to 130°C range (Pulse Electronics). The Pulse Electronics part offers a 5°C higher maximum operating temperature. Both parts are suitable for the specified temperature ranges.

Q: What compliance certifications apply to both parts?

A: Both the Würth Elektronik 744031010 and Pulse Electronics PG0085.102NL are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (unlimited moisture sensitivity level). Both parts carry ECCN EAR99 classification and HTSUS code 8504.50.4000.