1812-103K Equivalent & Substitute Parts

Part Overview

The 1812-103K is a 10 µH unshielded ferrite core inductor manufactured by API Delevan Inc., rated for 354 mA continuous current with a maximum DC resistance of 1.6 Ohm. This surface-mount component in 1812 (4532 Metric) package form factor is actively produced and suitable for SMD assembly applications across the -55°C to 125°C operating range. Alternative equivalent parts are available from other manufacturers when the original specification requires substitution due to supply constraints, inventory requirements, or specific performance characteristics needed for circuit optimization.

Substiute Parts

1812-103K

API Delevan Inc.In Stock: 10681812-103K Datasheet

Current PartRFQ

CM453232-100JL

Bourns Inc.In Stock: 5582CM453232-100JL Datasheet

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CM453232-100KL

Bourns Inc.In Stock: 45126CM453232-100KL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Equivalent substitution for the 1812-103K is determined by strict adherence to the following parameters: inductance value (10 µH), package footprint (1812 / 4532 Metric), shielding configuration (unshielded), core material (ferrite), and physical dimensions (0.177" L x 0.126" W, height 0.134" max). The DC resistance maximum of 1.6 Ohm is a critical constraint for circuit performance. While substitute parts may have different current ratings or tolerance specifications, they must maintain identical inductance, package dimensions, and DC resistance characteristics to ensure mechanical and electrical compatibility within the PCB assembly process.

Parameter Comparison

Engineering Selection Recommendations

The 1812-103K and both Bourns CM453232 variants share identical inductance values, DC resistance specifications, and physical package dimensions, establishing mechanical and electrical compatibility for PCB assembly and circuit operation. All three parts carry Active product status and universal environmental compliance certifications (REACH Unaffected, MSL 1).

Current Rating Consideration: The API Delevan 1812-103K supports 354 mA continuous current, while both Bourns substitutes (CM453232-100JL and CM453232-100KL) are rated for 250 mA. Component selection must account for this current rating differential in circuit designs that approach or exceed 250 mA.

Operating Temperature Range: The 1812-103K operates across -55°C to 125°C, while the Bourns substitutes function within -40°C to 125°C. Design specifications requiring operation below -40°C necessitate the original 1812-103K.

RoHS Compliance: The Bourns CM453232-100JL and CM453232-100KL are ROHS3 compliant, whereas the 1812-103K is RoHS non-compliant. Regulatory and procurement requirements for RoHS 3 directive compliance favor Bourns alternatives.

Packaging Format: CM453232-100JL is supplied in Tape & Reel (TR) format. CM453232-100KL is offered in Cut Tape (CT) and Digi-Reel® packaging options, providing flexibility for manufacturing batch size requirements.

Tolerance Specification: CM453232-100JL offers ±5% inductance tolerance compared to ±10% tolerance on both the original part and CM453232-100KL, supporting tighter circuit performance specifications when required.

Frequently Asked Questions (FAQ)

Q: Can CM453232-100JL and CM453232-100KL be used interchangeably as substitutes for the 1812-103K? A: Both Bourns parts are electrically and mechanically compatible with the 1812-103K, sharing identical inductance (10 µH), DC resistance (1.6 Ohm max), and 1812 (4532 Metric) package dimensions. Selection between them depends on packaging format requirements: CM453232-100JL is supplied in Tape & Reel, while CM453232-100KL is available in Cut Tape and Digi-Reel options.

Q: What is the primary limitation when substituting CM453232 parts for the 1812-103K? A: The Bourns CM453232-100JL and CM453232-100KL are rated for 250 mA continuous current, compared to 354 mA for the original 1812-103K. Circuits requiring current levels between 250 mA and 354 mA cannot use the Bourns substitutes without redesign or component derating analysis.

Q: Does operating temperature range affect part selection? A: The 1812-103K supports operation from -55°C to 125°C, while both Bourns substitutes operate from -40°C to 125°C. Applications requiring operation below -40°C must use the original 1812-103K.

Q: Are there RoHS compliance differences between the original part and substitutes? A: The 1812-103K is RoHS non-compliant. Both CM453232-100JL and CM453232-100KL are ROHS3 compliant. Product specifications or customer requirements mandating RoHS 3 compliance necessitate the Bourns substitutes.

Q: What inductance tolerance differences exist, and why do they matter? A: The 1812-103K and CM453232-100KL are specified with ±10% inductance tolerance, while CM453232-100JL offers ±5% tolerance. Circuits with stringent inductance value requirements benefit from the tighter tolerance specification of CM453232-100JL.

Q: Can the parts be used in the same PCB assembly process? A: Yes. All three components feature identical 1812 (4532 Metric) package footprints, physical dimensions (0.177" L x 0.126" W, 0.134" seated height), Surface Mount mounting type, and MSL 1 rating, ensuring compatibility with standard SMD pick-and-place and reflow assembly processes.