CAL45VB391K Equivalent & Substitute Parts

Part Overview

The CAL45VB391K is a 390 µH unshielded wirewound inductor manufactured by Taiyo Yuden, rated for 280 mA continuous current with a maximum DC resistance of 4.9 Ohm. This axial through-hole component operates across a temperature range of -25°C to 105°C and is designed for general-purpose fixed inductance applications.

The CAL45VB391K is classified as obsolete. Locating equivalent or substitute components is necessary to support ongoing production requirements, field repairs, and design continuity where this inductor is specified in existing applications.

Substiute Parts

CAL45VB391K

Taiyo YudenIn Stock: 1033CAL45VB391K Datasheet

Current PartRFQ

B82144F2394J000

EPCOS - TDK ElectronicsIn Stock: 3888B82144F2394J000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CAL45VB391K is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 390 µH (core electrical specification)
• Mounting type: Through Hole (board assembly compatibility)
• Package configuration: Axial (physical form factor and lead spacing)
• Shielding classification: Unshielded (electromagnetic behavior)

Secondary Compatibility Criteria:

• Current rating: Must equal or exceed 280 mA continuous operation
• DC resistance: Lower values are acceptable; higher values require thermal analysis
• Operating temperature range: Must encompass or exceed -25°C to 105°C
• Saturation current: Must exceed 290 mA minimum

The substitute part B82144F2394J000 (EPCOS - TDK Electronics, LBC series) matches all primary criteria and exceeds secondary performance specifications. This part is classified as active and carries current compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

B82144F2394J000 (EPCOS - TDK Electronics LBC Series)

This substitute part is suitable for direct replacement in applications where the CAL45VB391K is specified, subject to the following conditions:

1. Electrical Performance: The substitute provides superior electrical characteristics, including lower DC resistance (1.72 Ohm vs. 4.9 Ohm), higher current rating (650 mA vs. 280 mA), and higher saturation current (480 mA vs. 290 mA). These improvements reduce thermal dissipation and increase operational margin.

2. Inductance Specification: Both parts deliver 390 µH inductance. The substitute offers tighter tolerance (±5% vs. ±10%), which may improve circuit performance in precision applications.

3. Temperature Operating Range: The substitute extends the operating range to -55°C to 125°C, exceeding the original specification of -25°C to 105°C.

4. Physical Compatibility: The substitute is larger (0.256" Dia × 0.362" L vs. 0.173" Dia × 0.315" L). PCB layout and mechanical clearance must be verified before implementation.

5. Compliance and Availability: The substitute is actively manufactured, RoHS3 compliant, and REACH affected. The original part is obsolete. The substitute carries current environmental and regulatory certifications suitable for modern production environments.

6. Packaging: The substitute is supplied in Cut Tape (CT) format, supporting automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can B82144F2394J000 be used as a direct replacement for CAL45VB391K?

A: Yes, B82144F2394J000 is electrically and functionally compatible. Both parts deliver 390 µH inductance in unshielded axial through-hole configuration. The substitute exceeds the original current rating and saturation current specifications. Physical size difference (larger diameter and length) requires verification of PCB layout clearance.

Q: What is the primary reason for substitution?

A: The CAL45VB391K is classified as obsolete. The B82144F2394J000 is an active product from a major manufacturer, ensuring long-term availability and supply chain continuity.

Q: How do the DC resistance values affect circuit performance?

A: The substitute has lower DC resistance (1.72 Ohm vs. 4.9 Ohm). In circuits where the inductor carries continuous current, lower resistance reduces I²R losses and heat generation. Applications sensitive to inductor resistance must account for this difference in circuit analysis.

Q: Are there temperature range implications?

A: The substitute operates across -55°C to 125°C, compared to the original -25°C to 105°C. The extended range provides additional operational margin for applications in extreme environments. No derating is required for the original operating range.

Q: What is the impact of the larger physical size?

A: The substitute is 0.083" larger in diameter and 0.047" longer. PCB layout, component spacing, and mechanical clearance to adjacent components must be verified. Axial lead spacing remains compatible with through-hole assembly.

Q: Does the tighter inductance tolerance affect compatibility?

A: The substitute offers ±5% tolerance versus ±10% for the original. Tighter tolerance improves circuit predictability and may enhance performance in precision applications. This is a performance improvement, not a compatibility concern.

Q: What compliance certifications does the substitute carry?

A: B82144F2394J000 is RoHS3 compliant and REACH affected. These certifications align with current environmental and regulatory requirements for electronic components in modern manufacturing.

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

A: The substitute is supplied in Cut Tape (CT) format, suitable for automated pick-and-place assembly. The original packaging format is not specified in available data.