1812-824J Fixed Inductor Equivalent & Substitute Parts

Part Overview

The 1812-824J is a fixed unshielded ferrite core inductor manufactured by API Delevan Inc., rated at 820 µH inductance with 67 mA current capacity and 45 Ohm maximum DC resistance. This surface mount component operates across the temperature range of -55°C to 125°C and is packaged in the 1812 (4532 Metric) form factor. The part is currently in active production status. Substitute parts are identified to address inventory availability, compliance requirements, or specific application constraints while maintaining electrical and mechanical compatibility within defined parameter tolerances.

Substiute Parts

1812-824J

API Delevan Inc.In Stock: 7761812-824J Datasheet

Current PartRFQ

1812R-824J

API Delevan Inc.In Stock: 29721812R-824J Datasheet

DirectRFQ

CM453232-821JL

Bourns Inc.In Stock: 2111CM453232-821JL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1812-824J are classified based on strict alignment with the following critical parameters: inductance value (820 µH), inductance tolerance (±5%), package form factor (1812 / 4532 Metric), mounting type (surface mount), core material (ferrite), and shielding configuration (unshielded).

Direct Substitutes maintain all electrical specifications and differ only in manufacturer series designation or compliance certification status. These parts are interchangeable without circuit redesign.

Similar Substitutes share the same inductance, package, and core material but exhibit variations in current rating, DC resistance, or operating temperature range. Selection of similar substitutes requires verification that the application tolerates the specified parameter deviations.

The substitution logic prioritizes:

1. Identical inductance and tolerance
2. Identical package and mounting configuration
3. Compatible core material and shielding
4. Current rating and DC resistance within application requirements
5. Operating temperature range coverage

Parameter Comparison

Engineering Selection Recommendations

1812R-824J (API Delevan Inc.) is a direct substitute for the 1812-824J. Both parts are manufactured by API Delevan Inc. and share identical electrical specifications: 820 µH inductance, ±5% tolerance, 67 mA current rating, 45 Ohm maximum DC resistance, and -55°C to 125°C operating temperature range. The primary distinction is RoHS compliance status: the 1812R-824J is ROHS3 compliant, whereas the 1812-824J is RoHS non-compliant. Selection of the 1812R-824J is appropriate for applications subject to RoHS regulatory requirements or when compliance certification is mandated by procurement specifications.

CM453232-821JL (Bourns Inc.) is a similar substitute with the same inductance value (820 µH), tolerance (±5%), package (1812 / 4532 Metric), and core material (ferrite). However, this part exhibits reduced current rating (30 mA versus 67 mA) and lower DC resistance (35 Ohm maximum versus 45 Ohm maximum). The operating temperature range is narrower (-40°C to 125°C versus -55°C to 125°C). The CM453232-821JL is ROHS3 compliant. This substitute is suitable only for applications where the maximum current does not exceed 30 mA and the minimum operating temperature does not fall below -40°C. The lower DC resistance may provide improved efficiency in current-limited applications.

Selection between direct and similar substitutes depends on application current requirements, temperature extremes, and compliance mandates. Direct substitutes require no circuit modification. Similar substitutes require confirmation that reduced current rating and narrower temperature range are acceptable for the intended application.

Frequently Asked Questions (FAQ)

Q: Can the 1812R-824J replace the 1812-824J in all applications?

A: Yes, the 1812R-824J is a direct substitute. Both parts share identical electrical specifications and package configuration. The 1812R-824J differs only in RoHS compliance status (ROHS3 compliant versus RoHS non-compliant). No circuit modification is required.

Q: What are the limitations of using CM453232-821JL as a substitute?

A: The CM453232-821JL has a maximum current rating of 30 mA, compared to 67 mA for the 1812-824J. It is suitable only for applications where circuit current does not exceed 30 mA. Additionally, the operating temperature minimum is -40°C rather than -55°C, making it unsuitable for applications requiring operation below -40°C.

Q: Are all three parts mechanically compatible?

A: Yes. All three parts use the 1812 (4532 Metric) package form factor with identical physical dimensions: 0.177" L × 0.126" W (4.50 mm × 3.20 mm) and maximum seated height of 0.134" (3.40 mm). All are surface mount components suitable for standard PCB assembly processes.

Q: What is the difference between the 1812-824J and 1812R-824J series designations?

A: The series designation change from 1812 to 1812R reflects a product line update by API Delevan Inc. The 1812R series incorporates ROHS3 compliance. Electrical performance and package specifications remain identical.

Q: Can I use the CM453232-821JL in a high-current application rated for 67 mA?

A: No. The CM453232-821JL is rated for a maximum of 30 mA. Using this part in a 67 mA application would exceed its current rating and result in component failure or performance degradation.

Q: Are there temperature range considerations for substitute selection?

A: Yes. The 1812-824J and 1812R-824J both operate from -55°C to 125°C. The CM453232-821JL operates from -40°C to 125°C. If your application requires operation below -40°C, the CM453232-821JL is not suitable. The API Delevan parts must be used.

Q: What is the significance of the Q factor and self-resonant frequency?

A: The Q factor (30 @ 790 kHz) and self-resonant frequency (2.5 MHz) are provided specifications. The 1812-824J, 1812R-824J, and CM453232-821JL all share these values, confirming equivalent high-frequency performance characteristics.

Q: Does DC resistance affect substitute selection?

A: DC resistance affects power dissipation and thermal performance. The 1812-824J and 1812R-824J both have 45 Ohm maximum DC resistance. The CM453232-821JL has 35 Ohm maximum DC resistance, resulting in lower power loss. If thermal management is critical, the lower resistance of the CM453232-821JL may be advantageous, provided current rating constraints are satisfied.