CAL45VB1R5K Equivalent & Substitute Parts

Part Overview

The CAL45VB1R5K is a 1.5 µH unshielded wirewound inductor manufactured by Taiyo Yuden, rated for 3 A continuous current with a maximum DC resistance of 41 mOhm. This component is designed for through-hole axial mounting applications requiring fixed inductance in compact form factors. The part is classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure supply chain availability for new production and repair applications.

Substiute Parts

CAL45VB1R5K

Taiyo YudenIn Stock: 1123CAL45VB1R5K Datasheet

Current PartRFQ

B78108E1152K000

EPCOS - TDK ElectronicsIn Stock: 4989B78108E1152K000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CAL45VB1R5K is determined by strict equivalence across the following critical parameters:

Primary Matching Criteria:

• Inductance value: 1.5 µH
• Inductance tolerance: ±10%
• Mounting type: Through hole
• Package configuration: Axial
• Shielding classification: Unshielded

Secondary Compatibility Criteria:

• Current rating equal to or greater than 3 A
• DC resistance within acceptable operational limits
• Saturation current (Isat) sufficient for application requirements
• Operating temperature range encompassing or exceeding -25°C ~ 105°C
• Moisture sensitivity level MSL 1

The substitute part B78108E1152K000 meets all primary matching criteria and demonstrates enhanced performance characteristics in current rating, saturation current, and operating temperature range, while maintaining the same inductance specification and axial through-hole configuration.

Parameter Comparison

Engineering Selection Recommendations

The B78108E1152K000 serves as a direct functional equivalent to the obsolete CAL45VB1R5K based on matching inductance value, tolerance, and axial through-hole configuration. The substitute part is manufactured by EPCOS - TDK Electronics and maintains active product status, ensuring ongoing availability and supply chain reliability.

Compliance Advantages: The B78108E1152K000 is ROHS3 compliant and REACH affected, meeting current regulatory requirements for electronic component manufacturing and distribution. The original CAL45VB1R5K compliance status is not specified in available documentation.

Performance Characteristics: The substitute part demonstrates enhanced electrical performance with a higher current rating (3.8 A versus 3 A) and improved saturation current (4.8 A versus 4.4 A). The operating temperature range is extended to -55°C ~ 125°C, providing broader environmental operating capability compared to the original part's -25°C ~ 105°C range.

Physical Considerations: The substitute part exhibits slightly different physical dimensions (0.157" Dia x 0.374" L versus 0.173" Dia x 0.315" L). PCB layout verification is required to confirm mechanical fit within existing through-hole mounting positions.

DC Resistance: The substitute part exhibits a maximum DC resistance of 47 mOhm compared to 41 mOhm for the original part. This 6 mOhm increase represents a 14.6% rise in resistance and must be evaluated against circuit thermal and efficiency requirements.

Frequently Asked Questions (FAQ)

Q: Can the B78108E1152K000 be used as a direct replacement for the CAL45VB1R5K?

A: The B78108E1152K000 is functionally equivalent based on matching inductance (1.5 µH), tolerance (±10%), and axial through-hole configuration. Physical dimensions differ slightly, requiring PCB layout verification. The substitute part exceeds minimum current and saturation current requirements.

Q: What is the significance of the higher current rating on the substitute part?

A: The B78108E1152K000 is rated for 3.8 A continuous current compared to 3 A for the original part. This provides additional design margin and thermal headroom for applications operating near the original part's current limit. Saturation current is also improved from 4.4 A to 4.8 A.

Q: How does the increased DC resistance affect circuit performance?

A: The substitute part exhibits 47 mOhm maximum DC resistance versus 41 mOhm for the original part. This 6 mOhm increase generates additional resistive losses proportional to the square of the current flowing through the inductor. Circuit thermal analysis is required to confirm acceptable power dissipation levels.

Q: Are there physical mounting compatibility concerns?

A: The substitute part dimensions are 0.157" Dia x 0.374" L (4.00mm x 9.50mm) compared to 0.173" Dia x 0.315" L (4.40mm x 8.00mm) for the original part. The substitute is slightly narrower in diameter but longer in axial length. PCB hole spacing and component clearance must be verified before implementation.

Q: What compliance certifications does the substitute part carry?

A: The B78108E1152K000 is ROHS3 compliant and REACH affected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution in regulated markets.

Q: What is the operating temperature range difference?

A: The substitute part operates across -55°C ~ 125°C compared to -25°C ~ 105°C for the original part. This extended range provides 30°C additional low-temperature capability and 20°C additional high-temperature capability, suitable for broader environmental applications.

Q: Is the substitute part available in the same packaging format?

A: Both parts are supplied in axial through-hole configuration. The substitute part is available in Cut Tape (CT) packaging, while the original part packaging format is not specified. Tape format is standard for automated assembly processes.