ELL-8TP680MB Equivalent & Substitute Parts

Part Overview

The ELL-8TP680MB is a 68 µH shielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 1.3 A with a DC resistance of 140 mOhm. This component operates across the temperature range of -40°C to 105°C and is classified as obsolete. Due to its obsolete status, identifying equivalent substitute parts with compatible electrical and mechanical specifications is essential for design continuity and procurement planning.

Key Parameters

Parameter	Value
Inductance	68 µH
Tolerance	±20%
Current Rating	1.3 A
DC Resistance (DCR)	140 mOhm
Shielding	Shielded
Mounting Type	Surface Mount
Package Type	Nonstandard, Corner Terminals
Size	8.00 mm × 8.00 mm
Height (Max)	5.00 mm
Operating Temperature	-40°C to 105°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ELL-8TP680MB is determined by the following critical parameters:

Inductance Value: Must be 68 µH (±20% tolerance acceptable)
Current Rating: Minimum 1.3 A; higher ratings provide design margin
DC Resistance: Target range 132–192 mOhm; values within this range maintain circuit performance
Shielding: Must be shielded to prevent electromagnetic interference
Mounting Type: Surface mount only
Package Footprint: 8.00 mm × 8.00 mm preferred; 10.00 mm × 10.00 mm acceptable with PCB layout verification
Height Constraint: Maximum 5.00 mm seated height
Operating Temperature: Minimum -40°C to 105°C; extended ranges acceptable
Compliance: ROHS3 compliance required

The two identified substitute parts meet these criteria with variations in current rating, DC resistance, and core material that remain within acceptable engineering tolerances.

Parameter Comparison

Parameter	ELL-8TP680MB (Main)	7447714680 (Würth)	SRU8043-680Y (Bourns)
Manufacturer	Panasonic	Würth Elektronik	Bourns Inc.
Inductance	68 µH	68 µH	68 µH
Tolerance	±20%	±20%	±30%
Current Rating	1.3 A	1.9 A	1.2 A
Current - Saturation (Isat)	1.0 A	2.2 A	1.0 A
DC Resistance (DCR)	140 mOhm	132 mOhm Max	192 mOhm
Shielding	Shielded	Shielded	Shielded
Type	Wirewound	Drum Core, Wirewound	Drum Core, Wirewound
Core Material	Not specified	Ferrite	Ferrite
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Size (L × W)	8.00 mm × 8.00 mm	10.00 mm × 10.00 mm	8.00 mm × 8.00 mm
Height (Max)	5.00 mm	5.00 mm	4.60 mm
Operating Temperature	-40°C to 105°C	-40°C to 125°C	-40°C to 125°C
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

7447714680 (Würth Elektronik WE-PD Performance Series)

This substitute offers the highest current rating (1.9 A) and lowest DC resistance (132 mOhm Max), providing superior performance margin. The part is active in production with AEC-Q200 automotive qualification. The 10.00 mm × 10.00 mm footprint requires PCB layout verification but remains compatible with the 5.00 mm height constraint. Extended operating temperature range (-40°C to 125°C) exceeds the original specification. ROHS3 compliance and unlimited moisture sensitivity level are maintained.

SRU8043-680Y (Bourns SRU8043 Series)

This substitute maintains the original 8.00 mm × 8.00 mm footprint with a lower seated height (4.60 mm), offering direct PCB compatibility. Current rating (1.2 A) is marginally below the original specification but remains within acceptable tolerance for most applications. DC resistance (192 mOhm) is higher than the original but within the substitution parameter range. The part is active in production with extended operating temperature range (-40°C to 125°C). ROHS3 compliance and unlimited moisture sensitivity level are maintained. Inductance tolerance is ±30%, compared to ±20% for the original.

Both substitutes are ROHS3 compliant and carry unlimited moisture sensitivity ratings, ensuring regulatory and environmental compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 7447714680 be used as a direct replacement without PCB modification?

A: The 7447714680 has a 10.00 mm × 10.00 mm footprint compared to the original 8.00 mm × 8.00 mm. PCB layout verification is required to confirm pad spacing and component placement compatibility. Height (5.00 mm) remains within specification.

Q: What is the impact of higher DC resistance in the SRU8043-680Y?

A: The SRU8043-680Y has 192 mOhm DC resistance versus 140 mOhm in the original. This 52 mOhm increase results in higher power dissipation. For applications with continuous 1.3 A operation, thermal analysis is recommended to confirm acceptable performance.

Q: Are both substitutes suitable for automotive applications?

A: The 7447714680 carries AEC-Q200 automotive qualification. The SRU8043-680Y does not list automotive certification in the provided specifications. Application requirements should determine suitability.

Q: How does the ±30% tolerance of the SRU8043-680Y compare to the original ±20%?

A: The wider ±30% tolerance in the SRU8043-680Y may impact circuit performance in applications with tight inductance specifications. Circuit simulation or testing is appropriate for tolerance-sensitive designs.

Q: What is the saturation current difference between substitutes?

A: The 7447714680 has Isat of 2.2 A, while both the original and SRU8043-680Y have Isat of 1.0 A. The higher saturation current in the Würth part provides additional design margin for transient current conditions.

Q: Are both substitutes available in the same packaging format?

A: The 7447714680 is supplied in Tape & Reel (TR) format. The SRU8043-680Y is supplied in Cut Tape (CT) & Digi-Reel® format. Procurement and assembly processes should account for packaging differences.

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