1812-474K Fixed Inductor 470µH Equivalent & Substitute Parts

Part Overview

The 1812-474K is a fixed unshielded ferrite core inductor manufactured by API Delevan Inc., rated at 470 µH inductance with 88 mA current capacity and 26 Ohm maximum DC resistance. This surface mount component in 1812 (4532 Metric) package format operates across the temperature range of -55°C to 125°C. The part is currently active in production status. Substitute components are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements necessitate alternative electrical or compliance characteristics.

Substiute Parts

1812-474K

API Delevan Inc.In Stock: 6791812-474K Datasheet

Current PartRFQ

CM453232-471JL

Bourns Inc.In Stock: 931CM453232-471JL Datasheet

SimilarRFQ

CM453232-471KL

Bourns Inc.In Stock: 5622CM453232-471KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1812-474K are identified based on strict electrical and mechanical parameter alignment. The substitution criteria are:

Primary Matching Parameters:

• Inductance value: 470 µH (exact match required)
• Package / Case: 1812 (4532 Metric) (exact match required)
• Core material: Ferrite (exact match required)
• Shielding: Unshielded (exact match required)
• Mounting type: Surface Mount (exact match required)
• DC Resistance: 26 Ohm Max (exact match required)
• Self Resonant Frequency: 3 MHz (exact match required)

Secondary Consideration Parameters:

• Current Rating: Substitute parts rated at 62 mA are acceptable for applications where the circuit current requirement does not exceed the substitute part's rating
• Inductance Tolerance: Substitute parts with ±5% or ±10% tolerance are acceptable depending on circuit tolerance requirements
• Operating Temperature Range: Substitute parts with -40°C ~ 125°C range cover the upper portion of the main part's range

The identified substitute parts CM453232-471JL and CM453232-471KL from Bourns Inc. meet all primary matching parameters and are classified as drum core wirewound inductors with ferrite cores.

Parameter Comparison

Engineering Selection Recommendations

1812-474K (API Delevan Inc.):

• Primary selection for applications requiring 88 mA current rating
• Supports full operating temperature range of -55°C to 125°C
• RoHS non-compliant status requires verification against regulatory requirements
• Active product status ensures continued availability

CM453232-471JL (Bourns Inc.):

• Suitable for applications with maximum current requirement of 62 mA
• Tighter inductance tolerance of ±5% provides improved precision
• ROHS3 compliant for regulatory-sensitive applications
• Operating temperature range limited to -40°C minimum
• Active product status with 867 Pcs inventory

CM453232-471KL (Bourns Inc.):

• Suitable for applications with maximum current requirement of 62 mA
• Inductance tolerance of ±10% matches main part specification
• ROHS3 compliant for regulatory-sensitive applications
• Operating temperature range limited to -40°C minimum
• Active product status with 5536 Pcs inventory (highest stock availability)

Selection between substitute parts depends on circuit current requirements and compliance mandates. The CM453232-471KL offers the highest inventory availability and matching inductance tolerance specification.

Frequently Asked Questions (FAQ)

Q: Can CM453232-471JL or CM453232-471KL be used as direct replacements for 1812-474K?

A: Direct substitution is possible only when circuit current requirements do not exceed 62 mA. The substitute parts are rated at 62 mA compared to the main part's 88 mA rating. All other electrical parameters (inductance, DCR, core material, shielding, package, and self-resonant frequency) are identical. Mechanical compatibility is confirmed through identical 1812 (4532 Metric) package dimensions.

Q: What is the difference between CM453232-471JL and CM453232-471KL?

A: Both parts are manufactured by Bourns Inc. and share identical electrical specifications except for inductance tolerance. CM453232-471JL specifies ±5% tolerance, while CM453232-471KL specifies ±10% tolerance. The 1812-474K main part also specifies ±10% tolerance, making CM453232-471KL the closer tolerance match. CM453232-471KL has significantly higher inventory availability (5536 Pcs versus 867 Pcs).

Q: Are there temperature range limitations when substituting?

A: Yes. The substitute parts operate from -40°C to 125°C, while the main part operates from -55°C to 125°C. Substitution is not suitable for applications requiring operation below -40°C. For applications within the -40°C to 125°C range, substitute parts are compatible.

Q: What is the impact of the 26 mA current rating difference?

A: The main part 1812-474K is rated at 88 mA, while substitutes are rated at 62 mA. Substitution is valid only when the actual circuit current does not exceed 62 mA. Operating the substitute parts above their rated current will result in inductor saturation and performance degradation. Circuit current analysis is required before substitution.

Q: Do the substitute parts have different RoHS compliance status?

A: Yes. The 1812-474K is RoHS non-compliant, while both CM453232-471JL and CM453232-471KL are ROHS3 compliant. For applications subject to RoHS regulations, the Bourns substitute parts are required.

Q: Are the physical dimensions identical?

A: Yes. All three parts use the 1812 (4532 Metric) package with identical dimensions: 0.177" L x 0.126" W (4.50mm x 3.20mm) and maximum seated height of 0.134" (3.40mm). PCB layout and mechanical mounting are fully compatible.

Q: What is the significance of the Q factor difference?

A: The main part specifies Q of 40 @ 790 kHz, while substitutes specify Q of 40 @ 796 kHz. Both measurements are taken at similar frequencies within the 790-796 kHz range. The Q factor values are identical, indicating equivalent frequency response characteristics.