ELJ-FB820KF Equivalent & Substitute Parts

Part Overview

The ELJ-FB820KF is a 82 µH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 110 mA with a maximum DC resistance of 5.9Ohm in a 1812 (4532 Metric) surface mount package. This part is currently obsolete, making substitute components necessary for new designs and production continuity. Equivalent and substitute parts maintain the core electrical specifications (82 µH inductance, ±10% tolerance, 1812 package) while offering active product status and improved availability from alternative manufacturers.

Key Parameters

Parameter	Value
Inductance	82 µH
Tolerance	±10%
Current Rating	110 mA
DC Resistance (DCR)	5.9Ohm Max
Shielding	Unshielded
Package / Case	1812 (4532 Metric)
Mounting Type	Surface Mount
Operating Temperature	-20°C ~ 85°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the ELJ-FB820KF is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Inductance: 82 µH (exact match required)
Tolerance: ±10% (exact match required)
Package / Case: 1812 (4532 Metric) (exact match required)
Mounting Type: Surface Mount (exact match required)
Size / Dimension: 0.177" L x 0.126" W (4.50mm x 3.20mm) (exact match required)
Height - Seated (Max): 0.134" (3.40mm) (exact match required)
Moisture Sensitivity Level (MSL): 1 (Unlimited) (exact match required)

Secondary Compatibility Parameters:

Current Rating: Minimum 110 mA (equal or higher acceptable)
DC Resistance (DCR): Maximum 5.9Ohm (equal or lower acceptable)
Operating Temperature: Minimum range -20°C to 85°C (equal or wider acceptable)
Shielding: Unshielded (preferred for direct substitution)

Substitute parts are classified into two categories:

Direct Substitutes maintain all primary criteria and operate within equivalent electrical performance windows. These include CM453232-820KL, IMC1812BN820K, IMC1812EB820K, IMC1812ER820K, IMC1812ES820K, IMC1812RQ820K, and IMC1812RV820K from Bourns Inc. and Vishay Dale.

Similar Substitutes maintain all primary mechanical criteria but introduce variations in secondary electrical parameters. These include S1812R-823K (shielded variant with higher current rating), B82432T1823K000 (different package designation with higher current rating and lower DCR), and CC453232-820KL (higher current rating and lower DCR).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Inductance	Tolerance	Current Rating (mA)	DCR (Ohm Max)	Shielding	Operating Temperature	Product Status	RoHS Status
ELJ-FB820KF	Panasonic Electronic Components	82 µH	±10%	110	5.9	Unshielded	-20°C ~ 85°C	Obsolete	-
CM453232-820KL	Bourns Inc.	82 µH	±10%	120	7	Unshielded	-40°C ~ 125°C	Active	ROHS3 Compliant
IMC1812BN820K	Vishay Dale	82 µH	±10%	120	7	Unshielded	-55°C ~ 125°C	Active	RoHS non-compliant
IMC1812EB820K	Vishay Dale	82 µH	±10%	120	7	Unshielded	-55°C ~ 125°C	Active	ROHS3 Compliant
IMC1812ER820K	Vishay Dale	82 µH	±10%	120	7	Unshielded	-55°C ~ 125°C	Active	ROHS3 Compliant
IMC1812ES820K	Vishay Dale	82 µH	±10%	120	7	Unshielded	-55°C ~ 125°C	Active	ROHS3 Compliant
IMC1812RQ820K	Vishay Dale	82 µH	±10%	120	7	Unshielded	-55°C ~ 125°C	Active	RoHS non-compliant
IMC1812RV820K	Vishay Dale	82 µH	±10%	120	7	Unshielded	-55°C ~ 125°C	Active	RoHS non-compliant
S1812R-823K	API Delevan Inc.	82 µH	±10%	196	5.2	Shielded	-55°C ~ 125°C	Active	ROHS3 Compliant
B82432T1823K000	EPCOS - TDK Electronics	82 µH	±10%	220	3	Unshielded	-55°C ~ 150°C	Active	ROHS3 Compliant
CC453232-820KL	Bourns Inc.	82 µH	±10%	200	4.6	Unshielded	-40°C ~ 125°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

For RoHS3 Compliance Requirements: Select from CM453232-820KL (Bourns), IMC1812EB820K, IMC1812ER820K, or IMC1812ES820K (Vishay Dale), S1812R-823K (API Delevan), B82432T1823K000 (EPCOS - TDK Electronics), or CC453232-820KL (Bourns). These parts carry ROHS3 Compliant certification.

For Extended Temperature Range: IMC1812BN820K, IMC1812EB820K, IMC1812ER820K, IMC1812ES820K, IMC1812RQ820K, and IMC1812RV820K from Vishay Dale support -55°C to 125°C. S1812R-823K and B82432T1823K000 extend to -55°C to 125°C and -55°C to 150°C respectively.

For REACH Compliance: CM453232-820KL, IMC1812EB820K, IMC1812ER820K, IMC1812ES820K, S1812R-823K, B82432T1823K000, and CC453232-820KL carry REACH Unaffected or REACH Compliant status. IMC1812BN820K, IMC1812RQ820K, and IMC1812RV820K are REACH Affected.

For Packaging Preference: Tape & Reel (TR) packaging is available from CM453232-820KL, IMC1812ER820K, IMC1812ES820K, IMC1812RQ820K, IMC1812RV820K, S1812R-823K, B82432T1823K000, and CC453232-820KL. Bulk packaging is available from IMC1812BN820K and IMC1812EB820K.

For Lower DC Resistance: S1812R-823K (5.2Ohm Max), B82432T1823K000 (3Ohm Max), and CC453232-820KL (4.6Ohm Max) offer reduced DC resistance compared to the original 5.9Ohm specification.

For Higher Current Capacity: B82432T1823K000 (220 mA) and CC453232-820KL (200 mA) provide significantly higher current ratings than the original 110 mA specification.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher current rating than the original ELJ-FB820KF?

A: Yes. Higher current ratings indicate greater current handling capability and do not compromise circuit function when the inductance, tolerance, and package specifications match. Parts such as B82432T1823K000 (220 mA) and CC453232-820KL (200 mA) are direct electrical upgrades.

Q: What is the difference between shielded and unshielded inductors in substitution?

A: The ELJ-FB820KF is unshielded. S1812R-823K is a shielded variant. Shielded inductors reduce electromagnetic interference but may introduce different frequency response characteristics. Shielded substitutes are acceptable only if circuit design accounts for the shielding effect.

Q: Are Vishay Dale IMC1812 variants interchangeable with each other?

A: Yes. IMC1812BN820K, IMC1812EB820K, IMC1812ER820K, IMC1812ES820K, IMC1812RQ820K, and IMC1812RV820K share identical electrical specifications (82 µH, 120 mA, 7Ohm Max). Differences exist only in packaging format (Bulk vs. Tape & Reel) and compliance certifications (RoHS and REACH status).

Q: Does the 1812 package designation guarantee mechanical compatibility?

A: Yes. All substitute parts specified carry the 1812 (4532 Metric) package designation with matching dimensions (0.177" L x 0.126" W / 4.50mm x 3.20mm) and height (0.134" / 3.40mm maximum seated height). Direct PCB footprint compatibility is assured.

Q: What compliance certifications should I prioritize for new designs?

A: For new designs, prioritize ROHS3 Compliant parts: CM453232-820KL, IMC1812EB820K, IMC1812ER820K, IMC1812ES820K, S1812R-823K, B82432T1823K000, and CC453232-820KL. These meet current regulatory requirements for electronic component manufacturing and distribution.

Q: Can I substitute the ELJ-FB820KF with B82432T1823K000 despite the different package case designation?

A: B82432T1823K000 carries a "2-SMD, J-Lead" package case designation but maintains the 1812 (4532 Metric) supplier device package specification with identical physical dimensions and height. Mechanical compatibility is confirmed, but verify circuit design compatibility with the J-Lead termination style.

Q: How does DC resistance affect inductor substitution?

A: DC resistance directly impacts power dissipation and circuit efficiency. Lower DCR values reduce heat generation. Substitutes with equal or lower DCR (such as S1812R-823K at 5.2Ohm, CC453232-820KL at 4.6Ohm, or B82432T1823K000 at 3Ohm) improve performance compared to the original 5.9Ohm specification.

Q: What is the significance of the ±10% tolerance specification?

A: The ±10% tolerance indicates that actual inductance values may range from 73.8 µH to 90.2 µH. All substitute parts maintain this tolerance specification, ensuring circuit performance consistency across the production range.

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