ELC11D181F Equivalent & Substitute Parts

Part Overview

The ELC11D181F is a 180 µH unshielded drum core wirewound inductor manufactured by Panasonic Electronic Components, rated for 1.3 A with a DC resistance of 200mOhm. This through-hole component features a radial, vertical cylinder package and is RoHS compliant. The product is currently obsolete, making equivalent substitutes necessary for ongoing design requirements and production continuity.

Substiute Parts

ELC11D181F

Panasonic Electronic ComponentsIn Stock: 948ELC11D181F Datasheet

Current PartRFQ

7447720181

Würth ElektronikIn Stock: 13117447720181 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The Würth Elektronik 7447720181 qualifies as a substitute for the ELC11D181F based on the following critical parameters:

• Inductance Match: Both parts specify 180 µH with ±10% tolerance
• Core Type: Both use ferrite drum core, wirewound construction
• Shielding: Both are unshielded
• Mounting: Both are through-hole components
• Package: Both feature radial, vertical cylinder configuration
• Compliance: Both are RoHS compliant

The primary differences are current rating (1.3 A vs. 1 A) and DC resistance (200mOhm vs. 390mOhm Max), which must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

The 7447720181 from Würth Elektronik is an active product with current manufacturing support and ROHS3 compliance, providing supply chain continuity for the obsolete ELC11D181F. Both components meet the core electrical and mechanical substitution criteria for 180 µH ferrite drum core inductors in through-hole radial configurations.

Selection between these parts depends on circuit-specific requirements: the ELC11D181F offers higher current capacity (1.3 A) and lower DC resistance (200mOhm), while the 7447720181 provides a smaller footprint (7.80mm vs. 11.50mm diameter) with active product status and defined saturation current (1.1 A). Physical space constraints and current handling requirements must be evaluated against the specified ratings of each component.

Frequently Asked Questions (FAQ)

Q: Can the 7447720181 directly replace the ELC11D181F in all applications?

A: Both parts share identical inductance (180 µH ±10%), core material (ferrite), shielding (unshielded), and mounting type (through-hole radial). However, the 7447720181 has a lower current rating (1 A vs. 1.3 A) and higher DC resistance (390mOhm Max vs. 200mOhm). Substitution is valid only if circuit current requirements do not exceed 1 A and the higher DCR does not negatively impact circuit performance.

Q: What are the physical compatibility considerations?

A: The 7447720181 is significantly smaller (7.80mm diameter, 10.00mm height) compared to the ELC11D181F (11.50mm diameter, 13.90mm height). PCB layout and mechanical clearance must accommodate the smaller footprint. Both use radial through-hole leads, maintaining electrical connection compatibility.

Q: Why is the ELC11D181F listed as obsolete?

A: The ELC11D181F is no longer in active production by Panasonic Electronic Components. The 7447720181 from Würth Elektronik is an active product with ongoing manufacturing and supply availability.

Q: Are there compliance differences between these parts?

A: The ELC11D181F is RoHS compliant. The 7447720181 meets the more recent ROHS3 standard, indicating compliance with updated regulatory requirements. Both are suitable for RoHS-regulated applications.

Q: What is the significance of the saturation current specification on the 7447720181?

A: The 7447720181 specifies Isat at 1.1 A, indicating the current level at which the inductor begins to saturate and inductance degrades. This parameter is not specified for the ELC11D181F. Circuit designers must ensure operating current remains below saturation limits to maintain inductance stability.