1812-392K Equivalent & Substitute Parts

Part Overview

The 1812-392K is a fixed unshielded inductor manufactured by API Delevan Inc. with an inductance value of 3.9 µH, designed for surface mount applications in the 1812 (4532 Metric) package format. This component is classified as Active product status and operates across a temperature range of -55°C to 125°C. The part is currently in stock with 1039 pieces available as new original inventory.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained within the allowed specifications for this inductor category, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

1812-392K

API Delevan Inc.In Stock: 10891812-392K Datasheet

Current PartRFQ

CM453232-3R9KL

Bourns Inc.In Stock: 4752CM453232-3R9KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1812-392K is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Inductance value: 3.9 µH (±10% tolerance band)
• Package format: 1812 (4532 Metric) surface mount
• DC Resistance: 900 mOhm maximum
• Core material: Ferrite
• Shielding configuration: Unshielded
• Physical dimensions: 0.177" L x 0.126" W (4.50mm x 3.20mm)
• Height seated maximum: 0.134" (3.40mm)

Allowable Variation:

• Current rating may differ provided the substitute part meets or exceeds the application requirement
• Operating temperature range may extend beyond the original specification
• Self-resonant frequency and Q factor values are informational but do not restrict substitution eligibility

The substitute part CM453232-3R9KL from Bourns Inc. satisfies all critical matching parameters and is therefore classified as an equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

1812-392K (API Delevan Inc.):

• Product Status: Active
• RoHS Status: RoHS non-compliant
• REACH Status: REACH Unaffected
• Current Inventory: 1039 pieces available
• Suitable for applications where RoHS compliance is not required and extended low-temperature operation to -55°C is necessary

CM453232-3R9KL (Bourns Inc.):

• Product Status: Active
• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected
• Current Inventory: 4659 pieces available
• Suitable for applications requiring RoHS3 compliance and operating within -40°C to 125°C temperature range
• Current rating of 330 mA is lower than the original 472 mA specification; selection requires verification that circuit current demands do not exceed 330 mA

Both parts share identical inductance, tolerance, DC resistance, package dimensions, and self-resonant frequency characteristics. Selection between these parts depends on regulatory compliance requirements and circuit current specifications.

Frequently Asked Questions (FAQ)

Q: Can CM453232-3R9KL replace 1812-392K in all applications?

A: CM453232-3R9KL is mechanically and electrically compatible with 1812-392K for inductance, tolerance, DC resistance, and package format. However, the substitute part has a maximum current rating of 330 mA compared to 472 mA for the original part. Substitution is valid only when circuit current requirements do not exceed 330 mA. Additionally, the substitute part operates to -40°C minimum versus -55°C for the original; applications requiring operation below -40°C require the original 1812-392K.

Q: Are the physical dimensions identical?

A: Yes. Both parts use the 1812 (4532 Metric) package format with identical dimensions of 0.177" L x 0.126" W (4.50mm x 3.20mm) and maximum seated height of 0.134" (3.40mm). PCB footprints and assembly processes are interchangeable.

Q: What is the difference in core construction?

A: The 1812-392K uses a standard ferrite core construction. The CM453232-3R9KL uses a drum core wirewound ferrite construction. Both achieve identical inductance, tolerance, and DC resistance specifications. The construction difference does not affect electrical performance within the specified parameters.

Q: Does RoHS compliance affect electrical performance?

A: No. RoHS3 compliance in CM453232-3R9KL reflects manufacturing process and material composition changes but does not alter the electrical characteristics of inductance, tolerance, DC resistance, or frequency response. The compliance status is a regulatory and procurement consideration, not an electrical performance factor.

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

A: Both parts maintain Q factor of 50 at approximately 7.9-7.96 MHz and self-resonant frequency of 40 MHz. These parameters are equivalent and do not differentiate substitution eligibility. They are provided for circuit design reference in high-frequency applications.

Q: Can I use 1812-392K as a substitute for CM453232-3R9KL?

A: Yes, provided the application does not require RoHS3 compliance. The 1812-392K has higher current rating (472 mA versus 330 mA) and extended low-temperature operation (-55°C versus -40°C), making it suitable for more demanding thermal and current conditions. Regulatory compliance requirements determine the direction of substitution feasibility.