1812-683K Fixed Inductor - Equivalent & Substitute Parts

Part Overview

The API Delevan Inc. 1812-683K is a 68 µH unshielded fixed inductor rated for 183 mA maximum current with 6 Ohm maximum DC resistance in a 1812 (4532 Metric) surface mount package. This component is currently in active production status. Identification of substitute parts becomes necessary when the primary component experiences supply constraints, inventory availability issues, or when alternative sourcing options are required for manufacturing flexibility.

Substiute Parts

1812-683K

API Delevan Inc.In Stock: 11201812-683K Datasheet

Current PartRFQ

CM453232-680KL

Bourns Inc.In Stock: 14183CM453232-680KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1812-683K must satisfy the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Inductance value: 68 µH (±10% tolerance maintained)
• DC Resistance: 6 Ohm maximum
• Q Factor: 50 @ test frequency (2.5 MHz range)
• Self-Resonant Frequency: 9 MHz
• Operating Temperature Range: Must support -55°C minimum to 125°C minimum
• Current Rating: Must support required circuit current levels

Mechanical Compatibility Criteria:

• Package / Case: 1812 (4532 Metric)
• Mounting Type: Surface Mount
• Physical Dimensions: 0.177" L x 0.126" W (4.50mm x 3.20mm)
• Height - Seated (Max): 0.134" (3.40mm)
• Packaging: Tape & Reel (TR)

The Bourns Inc. CM453232-680KL meets these substitution criteria with compatible electrical specifications and identical package dimensions.

Parameter Comparison

*Compatible: Operating within circuit requirements when primary part current rating is ≤130 mA. Operating temperature range of CM453232-680KL supports -40°C minimum versus -55°C for 1812-683K.

Engineering Selection Recommendations

The Bourns CM453232-680KL qualifies as an electrical and mechanical substitute for the API Delevan 1812-683K based on matched inductance, DC resistance, Q factor, self-resonant frequency, and identical 1812 package footprint.

RoHS Compliance Advantage: The CM453232-680KL carries RoHS3 compliance certification, whereas the 1812-683K is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the Bourns part provides compliance alignment.

Current Rating Consideration: The CM453232-680KL is rated for 130 mA maximum current compared to 183 mA for the primary part. Selection of the substitute requires confirmation that circuit current demands do not exceed 130 mA.

Temperature Range Consideration: The CM453232-680KL operates over -40°C to 125°C versus -55°C to 125°C for the primary part. Selection of the substitute requires confirmation that minimum operating temperature requirements do not fall below -40°C.

Moisture Sensitivity: The CM453232-680KL carries MSL 3 (168 Hours) rating versus MSL 1 (Unlimited) for the primary part. Storage and handling procedures must account for moisture sensitivity requirements of the Bourns component.

Both parts maintain active production status and carry EAR99 ECCN and REACH Unaffected certifications.

Frequently Asked Questions (FAQ)

Q: Can the Bourns CM453232-680KL directly replace the API Delevan 1812-683K in existing PCB layouts?

A: Yes, the mechanical and electrical characteristics support direct footprint compatibility. Both components share identical package dimensions (1812 / 4532 Metric), mounting type (surface mount), and critical electrical parameters (68 µH inductance, 6 Ohm DC resistance, 50 Q @ 2.5 MHz, 9 MHz self-resonant frequency).

Q: What are the limiting factors for substituting the CM453232-680KL?

A: Two parameters require evaluation against circuit requirements: (1) Current Rating—the CM453232-680KL maximum of 130 mA versus the primary part's 183 mA; and (2) Operating Temperature Range—the CM453232-680KL minimum of -40°C versus the primary part's -55°C.

Q: Does the RoHS compliance difference affect electrical performance?

A: No. RoHS compliance represents a manufacturing and regulatory attribute, not an electrical specification. The CM453232-680KL delivers identical electrical performance while meeting RoHS3 regulatory requirements.

Q: What moisture sensitivity considerations apply to the Bourns substitute?

A: The CM453232-680KL carries MSL 3 (168 Hours) rating, indicating moisture sensitivity under specific storage and handling conditions. Implementation requires adherence to moisture control protocols during storage, transport, and pre-assembly procedures. The primary part carries MSL 1 (Unlimited), eliminating moisture sensitivity constraints.

Q: Are both parts actively manufactured?

A: Yes, both the API Delevan 1812-683K and the Bourns CM453232-680KL maintain active product status with manufacturing capability confirmed.

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