Bourns 1120-820K 82µH Wirewound Inductor Equivalent & Substitute Parts

Part Overview

The Bourns 1120-820K is an 82µH unshielded drum core wirewound inductor rated for 4.8A continuous current with 60mOhm maximum DC resistance. Designed for through-hole mounting in radial vertical cylinder configuration, this component operates across -55°C to 105°C. The 1120-820K is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Direct replacements and functionally equivalent alternatives are available from multiple manufacturers.

Key Parameters

Parameter	Value
Inductance	82 µH
Tolerance	±10%
Current Rating	4.8 A
DC Resistance (DCR)	60mOhm Max
Core Type	Ferrite Drum Core, Unshielded
Mounting Type	Through Hole
Package	Radial, Vertical Cylinder
Operating Temperature	-55°C ~ 105°C
Inductance Test Frequency	1 kHz

Substitute Part Grouping Explanation

Substitution eligibility is determined by matching the following critical parameters: inductance value (82µH), tolerance (±10%), DC resistance (60mOhm maximum), core material (ferrite), shielding type (unshielded), mounting configuration (through-hole radial vertical cylinder), and inductance test frequency (1kHz). Current rating and operating temperature ranges are secondary selection criteria. Parts are grouped into two categories: direct equivalents maintaining identical electrical and mechanical specifications, and functionally similar alternatives with minor parameter variations within acceptable engineering tolerances.

Parameter Comparison

Parameter	1120-820K (Main)	1120-820K-RC	DC780-823K	IHB2BV820K	IHB2EB820K
Manufacturer	Bourns Inc.	Bourns Inc.	API Delevan Inc.	Vishay Dale	Vishay Dale
Inductance	82 µH	82 µH	82 µH	82 µH	82 µH
Tolerance	±10%	±10%	±10%	±10%	±10%
Current Rating (Amps)	4.8 A	4.8 A	4.8 A	3.9 A	3.9 A
DC Resistance (DCR)	60mOhm Max	60mOhm Max	60mOhm Max	60mOhm Max	60mOhm Max
Core Type	Ferrite Drum Core	Ferrite Drum Core	Ferrite Drum Core	Ferrite Wirewound	Ferrite Wirewound
Shielding	Unshielded	Unshielded	Unshielded	Unshielded	Unshielded
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package	Radial, Vertical Cylinder	Radial, Vertical Cylinder	Radial, Vertical Cylinder	Radial, Vertical Cylinder	Radial, Vertical Cylinder
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 125°C	Not specified	Not specified
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	Non-compliant	Not specified	Not specified

Engineering Selection Recommendations

1120-820K-RC (Bourns Inc.) is the primary direct equivalent. This part maintains identical electrical specifications and mechanical form factor while offering active product status and ROHS3 compliance, addressing regulatory requirements for new designs.

DC780-823K (API Delevan Inc.) provides functional equivalence with identical inductance, tolerance, current rating, and DC resistance. The extended operating temperature range (-55°C to 125°C) offers broader thermal capability. Dimensional variations (0.772" diameter vs. 0.810", 0.831" height vs. 0.840") require PCB layout verification. RoHS non-compliance status matches the original part.

IHB2BV820K and IHB2EB820K (Vishay Dale) are functionally similar alternatives with matching inductance, tolerance, and DC resistance specifications. Current rating is reduced to 3.9A, making these suitable only for applications where the 4.8A rating is not required. These parts maintain the same core electrical and mechanical characteristics for through-hole radial vertical cylinder mounting.

Frequently Asked Questions (FAQ)

Q: Can 1120-820K-RC directly replace 1120-820K in existing designs? A: Yes. The 1120-820K-RC maintains identical inductance (82µH), tolerance (±10%), current rating (4.8A), DC resistance (60mOhm max), and physical dimensions. The primary difference is active product status and ROHS3 compliance.

Q: What are the limitations of DC780-823K as a substitute? A: DC780-823K matches all critical electrical parameters but has slightly different physical dimensions (0.772" diameter and 0.831" height versus 0.810" and 0.840" respectively). PCB layout and mechanical clearance must be verified before implementation.

Q: Are IHB2BV820K and IHB2EB820K suitable for all applications? A: These Vishay Dale parts are suitable only for applications where current requirements do not exceed 3.9A. The original 1120-820K is rated for 4.8A. Verify circuit current demands before substitution.

Q: What compliance considerations apply to substitute selection? A: The original 1120-820K is RoHS non-compliant. For new designs requiring RoHS compliance, 1120-820K-RC (ROHS3 compliant) is the appropriate choice. DC780-823K and Vishay Dale alternatives maintain non-compliant status.

Q: Are there packaging differences between substitute parts? A: 1120-820K-RC is supplied in bulk packaging. DC780-823K is also bulk packaged. Vishay Dale parts (IHB2BV820K, IHB2EB820K) have unspecified packaging. Confirm packaging requirements with supplier specifications.

Q: How do operating temperature ranges affect part selection? A: The original 1120-820K operates -55°C to 105°C. DC780-823K extends this to -55°C to 125°C, providing additional thermal margin. Vishay Dale alternatives have unspecified temperature ranges and require clarification from the manufacturer.

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