CAL45VB1R8K Equivalent & Substitute Parts

Part Overview

The CAL45VB1R8K is a 1.8 µH unshielded wirewound inductor manufactured by Taiyo Yuden, rated for 2.8 A continuous current with a maximum DC resistance of 48 mOhm. This through-hole axial component operates across a temperature range of -25°C to 105°C and is designed for applications requiring fixed inductance in compact form factors.

The CAL45VB1R8K is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for legacy systems or redesign initiatives.

Substiute Parts

CAL45VB1R8K

Taiyo YudenIn Stock: 776CAL45VB1R8K Datasheet

Current PartRFQ

NRS6045T1R8NMGK

Taiyo YudenIn Stock: 3860NRS6045T1R8NMGK Datasheet

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B82144F2182K000

EPCOS - TDK ElectronicsIn Stock: 4243B82144F2182K000 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CAL45VB1R8K is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 1.8 µH (tolerance range ±10% to ±30% acceptable)
• Current rating: minimum 2.8 A continuous
• Saturation current: minimum 4.1 A
• DC resistance: maximum 50 mOhm (slight variance acceptable)
• Mounting compatibility: through-hole or surface-mount with circuit board integration capability

Secondary Compatibility Factors:

• Operating temperature range: minimum -25°C to 105°C coverage
• Shielding configuration: unshielded preferred for direct replacement; shielded acceptable if EMI performance is not degraded
• Package type: axial preferred for through-hole applications; nonstandard packages require PCB layout verification

Two substitute parts meet the electrical and mechanical requirements of the CAL45VB1R8K:

1. NRS6045T1R8NMGK (Taiyo Yuden): Surface-mount shielded drum core inductor with superior current rating (3.9 A) and lower DCR (24.7 mOhm). Requires PCB redesign for surface-mount integration.

2. B82144F2182K000 (EPCOS - TDK Electronics): Through-hole axial drum core inductor with higher current rating (3.75 A), comparable DCR (50 mOhm), and extended temperature range (-55°C to 125°C). Direct form-factor compatibility with through-hole mounting.

Parameter Comparison

Engineering Selection Recommendations

For Direct Through-Hole Replacement:

The B82144F2182K000 is the primary substitute for the CAL45VB1R8K. Both components feature axial through-hole mounting, enabling direct PCB integration without layout modifications. The B82144F2182K000 provides equivalent inductance (1.8 µH), matching inductance tolerance (±10%), and comparable DC resistance (50 mOhm vs. 48 mOhm). The substitute offers higher current rating (3.75 A vs. 2.8 A) and saturation current (6.4 A vs. 4.1 A), providing design margin. The B82144F2182K000 is classified as Active and carries ROHS3 compliance, supporting current manufacturing standards and supply chain continuity.

For Surface-Mount Applications or Redesign:

The NRS6045T1R8NMGK is suitable when PCB redesign to surface-mount technology is feasible. This substitute delivers superior electrical performance with lower DC resistance (24.7 mOhm vs. 48 mOhm) and higher current capacity (3.9 A vs. 2.8 A). The shielded drum core construction reduces electromagnetic interference in sensitive circuits. However, the NRS6045T1R8NMGK is classified as Not For New Designs, limiting its applicability to legacy system support or interim solutions. The wider inductance tolerance (±30% vs. ±10%) requires circuit validation to confirm acceptable performance margins.

Compliance and Supply Considerations:

The B82144F2182K000 is the recommended substitute for new production and long-term supply security. It maintains Active product status, ROHS3 compliance, and REACH compliance, ensuring regulatory alignment and manufacturer support. The extended operating temperature range (-55°C to 125°C) accommodates broader environmental specifications than the original CAL45VB1R8K (-25°C to 105°C).

Frequently Asked Questions (FAQ)

Q: Can the NRS6045T1R8NMGK replace the CAL45VB1R8K without PCB modifications?

A: No. The NRS6045T1R8NMGK is a surface-mount component with nonstandard package dimensions (6.00mm x 6.00mm x 4.50mm height), while the CAL45VB1R8K is a through-hole axial inductor. Direct substitution requires PCB redesign, footprint changes, and assembly process modifications. The B82144F2182K000 maintains through-hole axial compatibility and requires no PCB layout changes.

Q: What is the impact of the ±30% inductance tolerance on the NRS6045T1R8NMGK?

A: The ±30% tolerance on the NRS6045T1R8NMGK is wider than the ±10% tolerance on the CAL45VB1R8K. This tolerance range may affect circuit performance in applications with tight inductance specifications. Circuit simulation and testing are necessary to confirm acceptable performance within the wider tolerance band. The B82144F2182K000 maintains the ±10% tolerance, matching the original specification.

Q: Is the shielded construction of the NRS6045T1R8NMGK compatible with unshielded circuit designs?

A: Shielded inductors can be used in circuits designed for unshielded components. The shielded construction reduces electromagnetic radiation and susceptibility to external interference, which generally improves circuit performance. However, the shielded drum core geometry differs from the unshielded wirewound design, potentially affecting parasitic capacitance and self-resonant frequency characteristics. Circuit validation is required for applications with specific EMI or frequency response requirements.

Q: What are the key differences between the B82144F2182K000 and the CAL45VB1R8K?

A: The B82144F2182K000 and CAL45VB1R8K share identical inductance (1.8 µH), matching inductance tolerance (±10%), and comparable DC resistance (50 mOhm vs. 48 mOhm). Both are through-hole axial components. The B82144F2182K000 features a drum core construction versus the wirewound design of the CAL45VB1R8K, resulting in higher current rating (3.75 A vs. 2.8 A) and saturation current (6.4 A vs. 4.1 A). The B82144F2182K000 operates across an extended temperature range (-55°C to 125°C) and carries Active product status with ROHS3 compliance.

Q: Can the higher current ratings of the substitute parts affect circuit operation?

A: Higher current ratings indicate greater saturation current margins and thermal capacity. In applications operating below the original CAL45VB1R8K current specification (2.8 A), the substitute parts with higher ratings (3.75 A or 3.9 A) operate with increased design margin and reduced thermal stress. This generally improves reliability and component longevity. No adverse effects on circuit operation result from using components with higher current ratings in applications within their specified operating range.

Q: What is the significance of the B82144F2182K000 being classified as Active?

A: Active product status indicates that the B82144F2182K000 is in current production, supported by the manufacturer, and available through established supply channels. This ensures long-term availability, consistent quality, and manufacturer technical support. The CAL45VB1R8K (Obsolete) and NRS6045T1R8NMGK (Not For New Designs) lack these assurances, making the B82144F2182K000 the preferred choice for production designs requiring supply continuity.

Q: Are there any moisture sensitivity considerations for these substitutes?

A: The CAL45VB1R8K and NRS6045T1R8NMGK both carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. The B82144F2182K000 carries MSL Not Applicable, indicating it is not subject to moisture sensitivity limitations. All three components are suitable for standard storage and handling conditions without special moisture control requirements.