ELJ-FA820JFD 82µH SMD Wirewound Inductor Equivalent & Substitute Parts

Part Overview

The Panasonic ELJ-FA820JFD is an 82 µH unshielded wirewound inductor rated for 75 mA with 12Ω maximum DC resistance in a 1210 (3225 Metric) surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates across -20°C to 85°C with ±5% inductance tolerance and is suitable for applications requiring fixed inductance filtering and energy storage in compact form factors.

Key Parameters

Parameter	Value
Inductance	82 µH
Tolerance	±5%
Current Rating	75 mA
DC Resistance (DCR)	12Ω Max
Shielding	Unshielded
Package / Case	1210 (3225 Metric)
Mounting Type	Surface Mount
Operating Temperature	-20°C ~ 85°C
Q @ Frequency	30 @ 2.52MHz
Frequency - Self Resonant	10MHz
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the ELJ-FA820JFD is determined by the following critical parameters:

Primary Matching Criteria:

Inductance value: 82 µH (±5% tolerance maintained)
Package / Case: 1210 (3225 Metric) surface mount form factor
Mounting Type: Surface Mount
Shielding configuration: Unshielded (preferred) or Shielded (with design consideration)

Secondary Compatibility Parameters:

Current Rating: Minimum 75 mA (equal or higher acceptable)
DC Resistance: Maximum 12Ω (equal or lower acceptable)
Q @ Frequency: 30 @ 2.52MHz (reference specification)
Self Resonant Frequency: 10MHz minimum
Operating Temperature: Must support application requirements

Substitute parts are grouped into two categories: direct unshielded equivalents and shielded alternatives. Unshielded substitutes maintain electromagnetic compatibility with the original design. Shielded substitutes provide additional EMI containment but require verification of board layout and thermal considerations due to increased height.

Parameter Comparison

Parameter	ELJ-FA820JFD (Main)	CM322522-820JL	IMC1210ER820J	ISC1210EB820J	ISC1210ER820J
Manufacturer	Panasonic	Bourns Inc.	Vishay Dale	Vishay Dale	Vishay Dale
Inductance	82 µH	82 µH	82 µH	82 µH	82 µH
Tolerance	±5%	±5%	±5%	±5%	±5%
Current Rating (mA)	75	60	79	85	85
DC Resistance (Ω Max)	12	10	12	11	11
Shielding	Unshielded	Unshielded	Unshielded	Shielded	Shielded
Core Type	Wirewound	Drum Core, Wirewound	Drum Core, Wirewound	Drum Core, Wirewound	Drum Core, Wirewound
Core Material	-	Ferrite	Iron Powder	Iron Powder	Iron Powder
Package / Case	1210 (3225 Metric)	Nonstandard	1210 (3225 Metric)	1210 (3225 Metric)	1210 (3225 Metric)
Height - Seated (Max)	0.094" (2.40mm)	0.087" (2.20mm)	0.095" (2.41mm)	0.095" (2.41mm)	0.095" (2.41mm)
Q @ 2.52MHz	30	30	30	30	30
Self Resonant Frequency	10MHz	11MHz	10MHz	11MHz	11MHz
Operating Temperature	-20°C ~ 85°C	-40°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	-	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

IMC1210ER820J (Vishay Dale) - Primary Recommendation

The IMC1210ER820J is the preferred direct substitute. It maintains the 1210 (3225 Metric) package footprint, matches the 82 µH inductance and ±5% tolerance, and exceeds the current rating specification at 79 mA versus the original 75 mA. DC resistance remains at 12Ω maximum, preserving thermal and electrical characteristics. The part is active status with ROHS3 compliance and extended operating temperature range (-55°C ~ 125°C), providing superior long-term availability and regulatory compliance. Tape & Reel packaging supports production automation.

ISC1210ER820J (Vishay Dale) - Secondary Recommendation

The ISC1210ER820J provides shielded construction with identical inductance, tolerance, and package dimensions. Current rating increases to 85 mA with DC resistance reduced to 11Ω maximum. Shielding reduces electromagnetic interference but increases seated height to 0.095" (2.41mm). This part is suitable for designs where EMI containment is required and board clearance permits the marginal height increase. Active status and ROHS3 compliance ensure supply continuity.

ISC1210EB820J (Vishay Dale) - Alternative for Bulk Packaging

Functionally equivalent to ISC1210ER820J with identical electrical specifications. Supplied in Bulk packaging rather than Tape & Reel, suitable for lower-volume production or manual assembly processes.

CM322522-820JL (Bourns Inc.) - Conditional Substitute

The CM322522-820JL provides unshielded construction with ferrite core material and reduced current rating of 60 mA. This part is not recommended for applications requiring the full 75 mA specification. Package classification as "Nonstandard" with reduced seated height (0.087" / 2.20mm) requires PCB layout verification. Extended operating temperature (-40°C ~ 125°C) and ROHS3 compliance are provided. Use only when current derating is acceptable and board space constraints favor reduced height.

Frequently Asked Questions (FAQ)

Q: Can I use ISC1210EB820J or ISC1210ER820J as direct replacements for the unshielded ELJ-FA820JFD?

A: Electrical substitution is valid. Both parts maintain 82 µH inductance, ±5% tolerance, and 1210 package footprint. The shielded construction introduces electromagnetic containment but increases seated height by 0.01" (0.01mm). Verify board layout clearance and confirm that shielding does not conflict with adjacent components or thermal management requirements.

Q: What is the current rating limitation for CM322522-820JL?

A: CM322522-820JL is rated for 60 mA maximum, which is 15 mA below the original ELJ-FA820JFD specification of 75 mA. This part is suitable only

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