CAL45VB101K Equivalent & Substitute Parts

Part Overview

The CAL45VB101K is a 100 µH unshielded wirewound inductor manufactured by Taiyo Yuden, rated for 590 mA with a maximum DC resistance of 1.2 Ohm. This through-hole axial component operates across a temperature range of -25°C to 105°C and is classified as obsolete. Due to its obsolete status, identifying equivalent substitute parts is necessary for ongoing production support, design continuity, and component procurement.

Substiute Parts

CAL45VB101K

Taiyo YudenIn Stock: 1203CAL45VB101K Datasheet

Current PartRFQ

NRS6045T101MMGK

Taiyo YudenIn Stock: 6208NRS6045T101MMGK Datasheet

SimilarRFQ

B78108E1104J000

EPCOS - TDK ElectronicsIn Stock: 2054B78108E1104J000 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CAL45VB101K are evaluated based on the following critical parameters:

Primary Matching Criteria:

• Inductance value: 100 µH (exact match required)
• Current rating: Equal to or greater than 590 mA
• DC resistance: Comparable to 1.2 Ohm maximum
• Mounting type: Through hole preferred for direct replacement
• Package configuration: Axial preferred for form-factor compatibility

Secondary Compatibility Factors:

• Shielding characteristics (unshielded preferred)
• Operating temperature range (minimum -25°C to 105°C coverage)
• Tolerance specification (±10% or tighter)
• Product status and compliance certifications

The substitute parts identified below meet the core electrical specifications while accounting for variations in core material, shielding, and packaging that may affect circuit performance and board layout considerations.

Parameter Comparison

Engineering Selection Recommendations

B78108E1104J000 (EPCOS - TDK Electronics)

This part is the primary substitute for direct replacement applications. It maintains through-hole axial mounting and unshielded configuration identical to the CAL45VB101K. The B78108E1104J000 provides superior current rating (640 mA versus 590 mA) and tighter tolerance (±5% versus ±10%), ensuring enhanced performance margin. The extended operating temperature range (-55°C to 125°C) accommodates broader environmental conditions. Active product status and ROHS3 compliance support long-term availability and regulatory requirements. The slightly elevated DC resistance (1.45 Ohm versus 1.2 Ohm) remains within acceptable design tolerances for most applications. This substitute is suitable for designs requiring form-factor compatibility and electrical performance equivalent to or exceeding the original specification.

NRS6045T101MMGK (Taiyo Yuden)

This part offers superior electrical performance with significantly lower DC resistance (605.8 mOhm versus 1.2 Ohm) and higher current rating (750 mA versus 590 mA). However, it requires design modification due to surface-mount packaging and nonstandard form factor, incompatible with through-hole axial mounting. The shielded drum core configuration differs from the unshielded wirewound design, affecting electromagnetic coupling characteristics. Extended operating temperature range (-25°C to 125°C) and ROHS3 compliance are advantageous. This substitute is applicable only to redesigned circuits accommodating surface-mount assembly and shielded inductor characteristics. Not recommended for direct board-level replacement without circuit board redesign.

Frequently Asked Questions (FAQ)

Q: Can the B78108E1104J000 replace the CAL45VB101K without circuit modification?

A: Yes. The B78108E1104J000 maintains identical mounting type (through hole), package configuration (axial), and shielding characteristics (unshielded). Electrical parameters are compatible: 100 µH inductance, 640 mA current rating (exceeds 590 mA requirement), and 1.45 Ohm DCR (comparable to 1.2 Ohm specification). Direct substitution on existing printed circuit boards is feasible.

Q: Why is the NRS6045T101MMGK not recommended as a direct replacement?

A: The NRS6045T101MMGK uses surface-mount packaging and nonstandard form factor, incompatible with through-hole axial mounting. Board-level redesign is required. Additionally, the shielded drum core configuration differs from the unshielded wirewound design, affecting circuit electromagnetic behavior. This part is suitable only for new designs accommodating surface-mount assembly.

Q: What is the significance of the DC resistance difference between the main part and substitutes?

A: DC resistance affects power dissipation and voltage drop across the inductor. The CAL45VB101K specifies 1.2 Ohm maximum; the B78108E1104J000 specifies 1.45 Ohm maximum. This 0.25 Ohm difference results in approximately 0.15 mW additional dissipation at 590 mA, negligible in most applications. The NRS6045T101MMGK exhibits significantly lower DCR (605.8 mOhm), reducing dissipation but requiring circuit validation due to different core material and shielding.

Q: Are there compliance or regulatory differences between these parts?

A: The B78108E1104J000 and NRS6045T101MMGK both carry ROHS3 compliance certification, meeting current environmental regulations. The CAL45VB101K, classified as obsolete, lacks specified RoHS status. For applications requiring regulatory compliance documentation, the active substitute (B78108E1104J000) provides superior long-term support and certification currency.

Q: What is the impact of tolerance specification on circuit performance?

A: The B78108E1104J000 provides ±5% tolerance versus the CAL45VB101K's ±10% tolerance, resulting in tighter inductance control. The NRS6045T101MMGK specifies ±20% tolerance, wider than the original. For frequency-dependent circuits, tighter tolerance reduces performance variation. Applications with relaxed inductance requirements tolerate the wider tolerance of the NRS6045T101MMGK.

Q: Can the NRS6045T101MMGK be used in through-hole applications with adapter components?

A: No. The NRS6045T101MMGK is a surface-mount component with nonstandard form factor (6.00mm x 6.00mm x 4.50mm height). Mechanical and electrical adaptation to through-hole mounting introduces parasitic inductance and resistance, compromising circuit performance. Direct surface-mount integration on redesigned boards is the appropriate implementation method.