744777182 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 744777182 is a 82 µH shielded drum core wirewound inductor rated for 840 mA continuous current with a maximum DC resistance of 430 mOhm. This surface mount component is designed for applications requiring stable inductance performance across industrial temperature ranges (-40°C to 125°C) and is AEC-Q200 rated for automotive applications. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent parts are identified when alternative inductors maintain the same inductance value, tolerance, shielding characteristics, and operating temperature range while meeting or exceeding the electrical performance requirements of the original specification.

Key Parameters

Parameter	Specification
Inductance	82 µH
Inductance Tolerance	±20%
Current Rating	840 mA
DC Resistance (Max)	430 mOhm
Saturation Current	900 mA
Shielding	Shielded
Self Resonant Frequency	8 MHz
Operating Temperature Range	-40°C to 125°C
Mounting Type	Surface Mount
Package Dimensions	7.30 mm × 7.30 mm × 4.50 mm (max height)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 744777182 is determined by the following critical parameters:

Inductance Value: Must be 82 µH with ±20% tolerance
Shielding: Must be shielded to maintain electromagnetic isolation
Current Rating: Must support minimum 840 mA continuous current
DC Resistance: Must not exceed 430 mOhm to ensure acceptable power dissipation
Saturation Current: Must be at or above 900 mA
Operating Temperature: Must cover the -40°C to 125°C range
Mounting: Must be surface mount compatible
Package Footprint: Physical dimensions must be compatible with 7.30 mm × 7.30 mm footprint

The Pulse Electronics P1167.823NL meets these substitution criteria with equivalent inductance, shielding, and temperature performance. While the current rating is lower at 700 mA, the saturation current specification of 700 mA and reduced DC resistance of 350 mOhm provide acceptable electrical characteristics for applications within the 700 mA operating envelope.

Parameter Comparison

Parameter	744777182 (Würth Elektronik)	P1167.823NL (Pulse Electronics)
Inductance	82 µH	82 µH
Inductance Tolerance	±20%	±20%
Current Rating	840 mA	700 mA
DC Resistance (Max)	430 mOhm	350 mOhm
Saturation Current	900 mA	700 mA
Shielding	Shielded	Shielded
Self Resonant Frequency	8 MHz	8 MHz
Operating Temperature Range	-40°C to 125°C	-40°C to 130°C
Mounting Type	Surface Mount	Surface Mount
Package Dimensions (L × W)	7.30 mm × 7.30 mm	7.54 mm × 7.54 mm
Height (Max)	4.50 mm	4.50 mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity	MSL 1	MSL 1

Engineering Selection Recommendations

744777182 (Würth Elektronik) is the primary specification. This part carries AEC-Q200 automotive qualification and is recommended for applications requiring the full 840 mA current rating with 900 mA saturation margin. The lower DC resistance of 430 mOhm and higher current capacity make this part suitable for power conversion and filtering applications in automotive and industrial environments.

P1167.823NL (Pulse Electronics) is a qualified substitute for applications operating at or below 700 mA continuous current. This part provides superior DC resistance performance at 350 mOhm, resulting in lower power dissipation. The extended operating temperature range to 130°C provides additional thermal margin. Both parts maintain identical inductance, tolerance, shielding, and self-resonant frequency specifications. The slightly larger footprint (7.54 mm vs. 7.30 mm) must be verified against PCB layout constraints.

Both parts are active production items with full RoHS3 compliance and unlimited moisture sensitivity rating, ensuring long-term supply availability and environmental regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can P1167.823NL replace 744777182 in all applications?

A: P1167.823NL is suitable for applications where the continuous current requirement does not exceed 700 mA. If your circuit requires the full 840 mA rating or 900 mA saturation margin, the original 744777182 must be used. Both parts share identical inductance, tolerance, shielding, and frequency characteristics.

Q: What is the impact of the different DC resistance values?

A: The P1167.823NL has lower DC resistance (350 mOhm vs. 430 mOhm), resulting in reduced power dissipation and lower operating temperature rise. This is advantageous in current-limited applications but does not affect inductance performance.

Q: Are there PCB layout considerations for substitution?

A: Yes. The P1167.823NL footprint is 7.54 mm × 7.54 mm compared to 7.30 mm × 7.30 mm for the 744777182. Verify that your PCB layout accommodates the slightly larger footprint. Both parts maintain the same 4.50 mm maximum height.

Q: Do both parts meet automotive qualification requirements?

A: The 744777182 carries AEC-Q200 automotive qualification. The P1167.823NL does not list AEC-Q200 certification in the provided specifications. For automotive applications requiring AEC-Q200 compliance, the 744777182 is the specified part.

Q: What is the difference in operating temperature ranges?

A: The 744777182 operates from -40°C to 125°C, while the P1167.823NL extends to -40°C to 130°C. Both ranges cover standard industrial and automotive temperature requirements. The P1167.823NL provides an additional 5°C upper margin.

Q: Are both parts RoHS3 compliant?

A: Yes. Both 744777182 and P1167.823NL are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating, ensuring compliance with environmental regulations and long-term reliability in storage and field conditions.

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