CMLB053T-R35MS Equivalent & Substitute Parts

Part Overview

The CMLB053T-R35MS is a 350 nH shielded inductor manufactured by Delta Electronics/Cyntec, rated for 13.7 A continuous current with a maximum DC resistance of 6.3 mOhm. This component is designed for surface mount applications in high-current, low-inductance circuits requiring electromagnetic shielding. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances for this inductance category.

Substiute Parts

CMLB053T-R35MS

Delta Electronics/CyntecIn Stock: 938CMLB053T-R35MS Datasheet

Current PartRFQ

PA4340.331NLT

Pulse ElectronicsIn Stock: 13060PA4340.331NLT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CMLB053T-R35MS is determined by the following critical parameters:

Inductance Value: The substitute part must fall within the ±20% tolerance band of 350 nH, establishing an acceptable range of 280 nH to 420 nH at the 100 kHz test frequency.

Current Rating: The substitute must support the application's continuous current requirement. The main part is rated for 13.7 A; substitute parts must meet or exceed this specification.

DC Resistance (DCR): Lower or equivalent DCR values are acceptable. The main part specifies 6.3 mOhm maximum; substitutes with equal or lower DCR maintain thermal performance characteristics.

Shielding: Both the main part and substitute must provide electromagnetic shielding to maintain circuit isolation and noise performance.

Mounting Type: Surface mount configuration is required for PCB compatibility.

Environmental Compliance: RoHS3 compliance and MSL 1 rating are mandatory for supply chain and manufacturing process compatibility.

The PA4340.331NLT meets these substitution criteria with a 330 nH inductance (within tolerance), 14 A current rating (exceeds requirement), 5 mOhm DCR (lower than main part), shielded construction, surface mount packaging, and equivalent environmental certifications.

Parameter Comparison

Engineering Selection Recommendations

The PA4340.331NLT qualifies as a direct substitute for the CMLB053T-R35MS based on Active product status for both components and full compliance alignment. Both parts maintain ROHS3 certification and MSL 1 rating, ensuring compatibility with standard manufacturing and supply chain processes.

The substitute part provides electrical advantages: 330 nH inductance remains within the ±20% tolerance specification, current rating of 14 A exceeds the 13.7 A requirement, and DC resistance of 5 mOhm is lower than the 6.3 mOhm maximum of the main part, resulting in reduced thermal dissipation.

The primary design consideration is physical footprint. The PA4340.331NLT measures 6.00mm × 5.40mm compared to the main part's 4.85mm × 4.70mm. PCB layout verification is required to confirm the larger footprint accommodates the available board space. Both components share identical 3.00 mm seated height, maintaining clearance compatibility.

Operating temperature range differs: the main part supports -55°C to 125°C while the substitute operates from -40°C to 125°C. Applications requiring operation below -40°C must retain the CMLB053T-R35MS.

Frequently Asked Questions (FAQ)

Q: What inductance values are acceptable as substitutes for the CMLB053T-R35MS?

A: Inductance values between 280 nH and 420 nH are acceptable, representing the ±20% tolerance band around the 350 nH specification at 100 kHz test frequency.

Q: Can the PA4340.331NLT be used in applications requiring -55°C operation?

A: No. The PA4340.331NLT operates from -40°C to 125°C. Applications requiring -55°C minimum temperature must use the CMLB053T-R35MS or identify an alternative substitute with equivalent low-temperature rating.

Q: Does the larger physical size of the PA4340.331NLT affect electrical performance?

A: Physical size does not affect electrical performance. The 6.00mm × 5.40mm footprint of the PA4340.331NLT versus the 4.85mm × 4.70mm footprint of the CMLB053T-R35MS requires PCB layout verification to confirm available board space. Both components maintain identical 3.00 mm seated height.

Q: Is the lower DC resistance of the PA4340.331NLT (5 mOhm vs. 6.3 mOhm) beneficial?

A: Yes. Lower DC resistance reduces resistive losses and thermal dissipation in the inductor, improving overall circuit efficiency. The PA4340.331NLT's 5 mOhm maximum DCR is advantageous compared to the main part's 6.3 mOhm specification.

Q: Are both parts suitable for AEC-Q200 automotive applications?

A: The PA4340.331NLT carries AEC-Q200 certification. The CMLB053T-R35MS does not list AEC-Q200 certification in the provided specifications. Applications requiring automotive-grade qualification should verify the CMLB053T-R35MS certification status with the manufacturer or select the PA4340.331NLT.

Q: What is the significance of the ±20% inductance tolerance for substitution?

A: The ±20% tolerance establishes the acceptable inductance variation range. At 350 nH nominal, this permits 280 nH to 420 nH. The PA4340.331NLT at 330 nH falls within this range, confirming electrical compatibility for circuit operation.