CAL45VB2R2K Equivalent & Substitute Parts

Part Overview

The CAL45VB2R2K is a 2.2 µH unshielded wirewound inductor manufactured by Taiyo Yuden, rated for 2.7 A continuous current with a maximum DC resistance of 54 mOhm. This through-hole axial component operates across the temperature range of -25°C to 105°C and is classified as obsolete. Due to its obsolete product status, equivalent substitute parts with matching or superior electrical and mechanical specifications are necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

CAL45VB2R2K

Taiyo YudenIn Stock: 1224CAL45VB2R2K Datasheet

Current PartRFQ

B78108E1222K000

EPCOS - TDK ElectronicsIn Stock: 1114B78108E1222K000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CAL45VB2R2K is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Inductance value: 2.2 µH with ±10% tolerance
• Mounting type: Through hole
• Package configuration: Axial
• Shielding classification: Unshielded
• Core type: Wirewound construction

Performance Criteria for Substitution:

• Current rating must equal or exceed 2.7 A
• DC resistance must not exceed 54 mOhm
• Saturation current (Isat) must be sufficient for the application
• Operating temperature range must encompass or exceed -25°C to 105°C
• Physical dimensions must be compatible with board layout constraints

The substitute part B78108E1222K000 meets all critical matching parameters while providing enhanced electrical performance characteristics, including higher current rating (3.4 A versus 2.7 A), superior saturation current (4 A versus 3.9 A), and an extended operating temperature range (-55°C to 125°C versus -25°C to 105°C).

Parameter Comparison

Engineering Selection Recommendations

The B78108E1222K000 is a direct functional substitute for the obsolete CAL45VB2R2K. Selection of this substitute part is supported by the following engineering factors:

Product Status Advantage: The substitute part maintains active product status with the manufacturer EPCOS - TDK Electronics, ensuring long-term availability and supply chain continuity compared to the obsolete CAL45VB2R2K.

Compliance and Certification: The B78108E1222K000 carries ROHS3 compliance and REACH affected status, meeting current regulatory requirements for electronic components in most markets. Both parts share identical MSL classification (1 - Unlimited), indicating equivalent moisture handling requirements.

Electrical Performance: The substitute part provides superior electrical performance with a 26% increase in current rating (3.4 A versus 2.7 A) and maintains DC resistance within acceptable limits (57 mOhm versus 54 mOhm maximum). The saturation current specification (4 A) exceeds the original part requirement (3.9 A).

Thermal Operating Range: The extended operating temperature range of -55°C to 125°C encompasses the original specification of -25°C to 105°C, providing additional thermal margin for demanding applications.

Physical Compatibility: While dimensional differences exist (0.157" Dia x 0.374" L for substitute versus 0.173" Dia x 0.315" L for original), both parts maintain axial through-hole configuration. Board layout verification is required to confirm physical fit within existing PCB footprints.

Frequently Asked Questions (FAQ)

Q: Can the B78108E1222K000 be used as a direct replacement for the CAL45VB2R2K in all applications?

A: The B78108E1222K000 meets all critical electrical specifications (2.2 µH inductance, ±10% tolerance, unshielded wirewound construction, through-hole axial mounting). Physical dimensions differ slightly; board layout verification is necessary to confirm PCB footprint compatibility before implementation.

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

A: The B78108E1222K000 is rated for 3.4 A continuous current compared to 2.7 A on the original part. This provides additional design margin and allows the substitute to operate at lower stress levels in the same application, potentially improving reliability and thermal performance.

Q: Are there any compliance differences between the two parts?

A: The substitute part B78108E1222K000 carries ROHS3 compliance and REACH affected status. The original CAL45VB2R2K compliance information is not specified in the available data. Both parts share identical MSL classification (1 - Unlimited).

Q: How do the DC resistance specifications compare?

A: The original CAL45VB2R2K specifies 54 mOhm maximum DC resistance, while the substitute B78108E1222K000 specifies 57 mOhm maximum. This 3 mOhm difference is within acceptable tolerance for equivalent substitution and does not significantly impact circuit performance in typical applications.

Q: What is the difference between the core materials?

A: The CAL45VB2R2K uses wirewound construction without specified core material details. The B78108E1222K000 employs drum core ferrite wirewound construction. Both maintain identical inductance value and tolerance, with the ferrite core providing stable performance across the operating temperature range.

Q: Are the physical dimensions compatible with existing PCB designs?

A: The substitute part measures 0.157" Dia x 0.374" L (4.00mm x 9.50mm) compared to the original 0.173" Dia x 0.315" L (4.40mm x 8.00mm). The substitute is slightly narrower in diameter but longer in length. PCB footprint and component placement verification is required before design implementation.

Q: What is the operating temperature advantage of the substitute part?

A: The B78108E1222K000 operates across -55°C to 125°C, compared to the original -25°C to 105°C specification. This extended range provides additional thermal margin for applications in extreme environments or with demanding thermal cycling requirements.

Q: Why is the original part listed as obsolete?

A: The CAL45VB2R2K is classified as obsolete by the manufacturer Taiyo Yuden, indicating discontinued production and limited future availability. The B78108E1222K000 maintains active product status, ensuring reliable long-term supply for new designs and production requirements.