CAL45VB390K Equivalent & Substitute Parts

Part Overview

The CAL45VB390K is a 39 µH unshielded wirewound inductor manufactured by Taiyo Yuden, rated for 900 mA continuous current with a maximum DC resistance of 470 mOhm. This component is designed for through-hole axial mounting applications requiring fixed inductance in compact form factors.

The CAL45VB390K is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for legacy systems utilizing this inductor.

Substiute Parts

CAL45VB390K

Taiyo YudenIn Stock: 1260CAL45VB390K Datasheet

Current PartRFQ

B82144F2393J000

EPCOS - TDK ElectronicsIn Stock: 2067B82144F2393J000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CAL45VB390K is determined by strict alignment of electrical and mechanical parameters. The following criteria establish substitution validity:

Electrical Parameters (Critical):

• Inductance value must equal 39 µH
• Current rating must meet or exceed 900 mA
• DC resistance must not exceed 470 mOhm
• Saturation current must support the operating current envelope

Mechanical Parameters (Important):

• Mounting type must be through-hole
• Package configuration must be axial
• Physical dimensions must accommodate existing PCB layouts or allow mechanical compatibility

Environmental Parameters (Important):

• Operating temperature range must encompass or exceed -25°C ~ 105°C
• Shielding configuration must match unshielded specification

The B82144F2393J000 qualifies as a substitute based on these criteria. It maintains the 39 µH inductance specification, exceeds the current rating requirement (1.75 A vs. 900 mA), provides superior DC resistance performance (250 mOhm vs. 470 mOhm), and maintains through-hole axial mounting compatibility.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The CAL45VB390K is classified as obsolete, making the B82144F2393J000 the appropriate substitute for ongoing supply requirements. The substitute part is active and available in production quantities (2015 Pcs in stock vs. 1173 Pcs for the main part).

Compliance and Certification: The B82144F2393J000 carries RoHS3 compliance and REACH affected status, meeting current regulatory requirements for electronic components. Both parts share the same ECCN (EAR99) and HTSUS classification (8504.50.8000), ensuring consistent export and import compliance.

Electrical Performance: The substitute part exceeds the electrical requirements of the main part across all critical parameters. The 1.75 A current rating provides operational margin above the 900 mA requirement. The 250 mOhm maximum DC resistance is substantially lower than the 470 mOhm specification, resulting in reduced power dissipation and improved efficiency in the application circuit.

Mechanical Compatibility: Physical dimensions of the substitute part are larger (6.50mm x 9.20mm vs. 4.40mm x 8.00mm). PCB layout verification is required to confirm that the increased diameter and length do not conflict with existing component placement or clearance requirements.

Temperature Performance: The substitute part operates across -55°C ~ 125°C, extending the lower and upper temperature limits beyond the main part specification of -25°C ~ 105°C. This provides enhanced thermal margin for applications subject to extreme environmental conditions.

Frequently Asked Questions (FAQ)

Q: Can the B82144F2393J000 be used as a direct replacement for the CAL45VB390K?

A: The B82144F2393J000 is electrically compatible and functionally equivalent for the specified 39 µH inductance and 900 mA current requirement. However, physical dimensions differ. The substitute is larger (6.50mm diameter vs. 4.40mm, and 9.20mm length vs. 8.00mm). Verify that PCB layout accommodates the increased size before implementation.

Q: What are the key advantages of substituting to the B82144F2393J000?

A: The substitute part provides three primary advantages: (1) Active product status with assured supply availability, (2) Lower DC resistance (250 mOhm vs. 470 mOhm), reducing power loss and heat generation, and (3) Extended operating temperature range (-55°C ~ 125°C vs. -25°C ~ 105°C), supporting broader environmental applications.

Q: Does the tighter tolerance of the B82144F2393J000 (±5% vs. ±10%) affect circuit performance?

A: Tighter tolerance improves inductance value consistency and reduces circuit parameter variation. This is beneficial for applications requiring precise inductance values. No negative effects result from the improved tolerance specification.

Q: Are there any size-related concerns when substituting the B82144F2393J000?

A: The substitute part has a larger diameter (6.50mm vs. 4.40mm) and slightly longer length (9.20mm vs. 8.00mm). Verify that the PCB layout provides adequate clearance and that component spacing does not create thermal or electrical interference issues. Mechanical fit validation is required before production implementation.

Q: What is the significance of the drum core construction in the B82144F2393J000?

A: The drum core construction with ferrite material provides the electrical performance characteristics of the substitute part, including the lower DC resistance and higher current rating. Both the main part and substitute are wirewound inductors; the core material difference does not affect functional compatibility for the specified application parameters.

Q: Are both parts compliant with current regulatory standards?

A: The B82144F2393J000 is RoHS3 compliant and REACH affected, meeting current regulatory requirements. The CAL45VB390K, being obsolete, may not carry current compliance certifications. The substitute part is the appropriate choice for new designs or production requiring current regulatory compliance.

Q: What is the impact of the lower saturation current specification in the B82144F2393J000?

A: The substitute part specifies 1.5 A saturation current compared to 920 mA for the main part. Since the application operates at 900 mA continuous current, the substitute maintains adequate saturation margin. The 1.5 A saturation current is sufficient for the specified operating envelope.