CAL45VB120K Equivalent & Substitute Parts

Part Overview

The CAL45VB120K is a 12 µH unshielded wirewound inductor manufactured by Taiyo Yuden, rated for 1.45 A continuous current with a maximum DC resistance of 170 mOhm. This component is designed for through-hole axial mounting applications requiring fixed inductance in the 12 µH range. The part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support, maintenance, and production continuity.

Substiute Parts

CAL45VB120K

Taiyo YudenIn Stock: 1109CAL45VB120K Datasheet

Current PartRFQ

B82144F2123K000

EPCOS - TDK ElectronicsIn Stock: 5961B82144F2123K000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CAL45VB120K is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 12 µH with ±10% tolerance
• Mounting type: Through hole axial configuration
• Shielding classification: Unshielded

Secondary Compatibility Criteria:

• Current rating must equal or exceed 1.45 A continuous
• DC resistance must not exceed 170 mOhm maximum
• Operating temperature range must encompass or exceed -25°C ~ 105°C
• Package / case must be axial through-hole

The substitute part B82144F2123K000 meets all primary matching criteria and exceeds secondary compatibility requirements with higher current ratings (2.4 A), lower DC resistance (130 mOhm), and an extended operating temperature range (-55°C ~ 125°C).

Parameter Comparison

Engineering Selection Recommendations

The B82144F2123K000 is a direct functional substitute for the CAL45VB120K based on the following engineering criteria:

Electrical Compatibility: The substitute part maintains the same 12 µH inductance value with identical ±10% tolerance. All electrical performance parameters of the substitute meet or exceed the original part specifications: current rating is 65% higher (2.4 A vs. 1.45 A), saturation current is 66% higher (2.65 A vs. 1.6 A), and DC resistance is 24% lower (130 mOhm vs. 170 mOhm). These characteristics ensure the substitute will perform identically or better in the original application circuit.

Compliance and Product Status: The CAL45VB120K is obsolete, whereas B82144F2123K000 is in active production with ROHS3 compliance and REACH affected status. This ensures long-term availability and regulatory alignment for new designs and production continuity.

Physical Considerations: The substitute part is physically larger (0.256" Dia x 0.362" L versus 0.173" Dia x 0.315" L). PCB layout verification is required to confirm that the increased diameter and length do not create mechanical interference with adjacent components or board constraints.

Temperature Performance: The substitute operates across -55°C ~ 125°C, which exceeds the original operating range of -25°C ~ 105°C, providing enhanced thermal margin for demanding applications.

Frequently Asked Questions (FAQ)

Q: Can the B82144F2123K000 be used as a direct replacement for the CAL45VB120K?

A: Yes, the B82144F2123K000 is electrically compatible as a substitute. Both parts provide 12 µH inductance with ±10% tolerance, unshielded axial through-hole configuration, and identical package classification. The substitute exceeds all electrical performance requirements of the original part. Physical dimensions must be verified against PCB layout constraints before implementation.

Q: What are the key differences between these two inductors?

A: The primary differences are: (1) manufacturer (Taiyo Yuden versus EPCOS - TDK Electronics), (2) core construction (wirewound versus drum core wirewound), (3) current ratings (1.45 A versus 2.4 A), (4) DC resistance (170 mOhm versus 130 mOhm), (5) operating temperature range (-25°C ~ 105°C versus -55°C ~ 125°C), (6) physical size (4.40mm x 8.00mm versus 6.50mm x 9.20mm), and (7) product status (obsolete versus active production).

Q: Why is the substitute part larger?

A: The B82144F2123K000 uses a drum core construction with ferrite material, which enables higher current handling (2.4 A) and lower DC resistance (130 mOhm) compared to the original wirewound design. This improved performance requires a larger physical package.

Q: Is the substitute part RoHS compliant?

A: Yes, the B82144F2123K000 is ROHS3 compliant. The original CAL45VB120K compliance status is not specified in the available documentation.

Q: Will the substitute part fit in the same PCB footprint?

A: No. The substitute part has larger dimensions (0.256" Dia x 0.362" L) compared to the original (0.173" Dia x 0.315" L). PCB layout review is required to confirm adequate clearance and mechanical compatibility before substitution.

Q: What is the inductance tolerance for both parts?

A: Both the CAL45VB120K and B82144F2123K000 have an inductance tolerance of ±10%, ensuring equivalent accuracy in circuit applications.

Q: Are there any frequency-dependent differences between these inductors?

A: The CAL45VB120K was tested at 2.52 MHz inductance frequency, while the B82144F2123K000 was tested at 100 kHz. The B82144F2123K000 also specifies a self-resonant frequency of 20 MHz. These differences reflect different measurement standards but do not affect functional substitution for fixed inductance applications.