CMLB053T-R22MS Equivalent & Substitute Parts

Part Overview

The CMLB053T-R22MS is a 220 nH shielded inductor manufactured by Delta Electronics/Cyntec, rated for 17 A continuous current with a maximum DC resistance of 3.9 mOhm. This surface mount component is designed for high-current applications requiring low inductance values with controlled impedance characteristics. The part is active in production with 1839 units currently in stock. Substitute parts are identified when equivalent electrical performance can be maintained within specified tolerance ranges while accommodating application-specific constraints such as thermal requirements, package dimensions, or supply chain availability.

Substiute Parts

CMLB053T-R22MS

Delta Electronics/CyntecIn Stock: 1866CMLB053T-R22MS Datasheet

Current PartRFQ

PA4340.221NLT

Pulse ElectronicsIn Stock: 1187PA4340.221NLT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CMLB053T-R22MS is determined by the following critical parameters:

Inductance Value: The substitute part must maintain 220 nH inductance within the tolerance band of the original specification (±20%). The PA4340.221NLT meets this requirement at ±30% tolerance, which encompasses the nominal 220 nH value.

Current Rating: The substitute must support the application's continuous current demand. The CMLB053T-R22MS is rated for 17 A continuous current. The PA4340.221NLT provides 15.5 A continuous current rating, which represents a 8.8% reduction in current capacity. This substitution is valid only for applications where the actual operating current does not exceed 15.5 A.

DC Resistance: The CMLB053T-R22MS specifies a maximum DCR of 3.9 mOhm. The PA4340.221NLT has a maximum DCR of 4.4 mOhm, representing a 12.8% increase in resistance. This parameter difference affects power dissipation and thermal performance in high-current applications.

Shielding: Both parts are shielded inductors, meeting electromagnetic interference containment requirements.

Operating Temperature Range: The CMLB053T-R22MS operates from -55°C to 125°C. The PA4340.221NLT operates from -40°C to 125°C, providing a narrower low-temperature range. Substitution is valid for applications where minimum operating temperature does not fall below -40°C.

Package and Mounting: Both parts are surface mount components in nonstandard packages with identical seated height (3.00 mm). Physical dimensions differ: the substitute is larger (6.00 × 5.40 mm versus 4.85 × 4.70 mm), requiring PCB layout verification.

Compliance and Certifications: Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 rating.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The CMLB053T-R22MS is recommended as the primary choice for applications requiring the full 17 A continuous current rating and extended low-temperature operation down to -55°C. Both parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating, ensuring long-term supply viability and regulatory compliance.

Substitute Part Applicability: The PA4340.221NLT is suitable as a substitute when the following conditions are met:

• Continuous operating current does not exceed 15.5 A
• Minimum operating temperature is not lower than -40°C
• PCB layout can accommodate the larger footprint (6.00 × 5.40 mm versus 4.85 × 4.70 mm)
• The 12.8% increase in maximum DCR is acceptable for the application's thermal and efficiency requirements
• The wider inductance tolerance (±30%) is compatible with circuit performance specifications

Compliance Basis: Both parts carry identical regulatory certifications (ROHS3, REACH unaffected, MSL 1), supporting interchangeability from a compliance perspective. The PA4340.221NLT includes AEC-Q200 automotive qualification, providing additional reliability assurance for automotive and high-reliability applications.

Frequently Asked Questions (FAQ)

Q: Can the PA4340.221NLT replace the CMLB053T-R22MS in all applications?

A: No. The substitute part has a lower continuous current rating (15.5 A versus 17 A) and a narrower operating temperature range (-40°C to 125°C versus -55°C to 125°C). Substitution is valid only when the application's actual operating current remains below 15.5 A and the minimum operating temperature does not fall below -40°C.

Q: What is the impact of the higher DC resistance in the PA4340.221NLT?

A: The PA4340.221NLT has a maximum DCR of 4.4 mOhm compared to 3.9 mOhm in the CMLB053T-R22MS. This 12.8% increase results in higher resistive losses and increased heat dissipation at rated current. For a 15.5 A load, the PA4340.221NLT dissipates approximately 1.06 W compared to 0.93 W for the CMLB053T-R22MS. Thermal design must account for this difference.

Q: Are the physical dimensions compatible on the PCB?

A: The parts have different footprints. The CMLB053T-R22MS measures 4.85 × 4.70 mm, while the PA4340.221NLT measures 6.00 × 5.40 mm. Both have identical seated height (3.00 mm). PCB layout must be verified to confirm the larger substitute part fits within available space constraints.

Q: What is the significance of the wider inductance tolerance in the PA4340.221NLT?

A: The PA4340.221NLT specifies ±30% inductance tolerance compared to ±20% for the CMLB053T-R22MS. Both parts are centered at 220 nH, so the nominal value is identical. The wider tolerance in the substitute part means greater variation in individual units. Circuit designs must tolerate this variation or implement post-assembly tuning if tight inductance control is required.

Q: Why does the PA4340.221NLT have a higher saturation current (21 A) despite a lower continuous rating (15.5 A)?

A: Saturation current and continuous current rating are independent parameters. Saturation current indicates the current level at which inductance begins to degrade due to core saturation. Continuous current rating reflects the maximum current the part can sustain indefinitely without exceeding thermal limits. The PA4340.221NLT's higher saturation current provides margin against transient overcurrent events, while its lower continuous rating reflects thermal constraints at sustained operation.

Q: Are both parts suitable for automotive applications?

A: The PA4340.221NLT carries AEC-Q200 automotive qualification. The CMLB053T-R22MS does not list automotive qualification in the provided specifications. For automotive applications, the PA4340.221NLT provides documented reliability assurance, though current and temperature limitations must still be observed.

Q: What is the difference between the core materials?

A: The CMLB053T-R22MS specifies a metal core. The PA4340.221NLT does not provide core material information in the available specifications. Both parts are shielded inductors suitable for high-current applications.