CMLB063T-R33MS Equivalent & Substitute Parts

Part Overview

The CMLB063T-R33MS is a 330 nH shielded inductor manufactured by Delta Electronics/Cyntec, rated for 22 A continuous current with a maximum DC resistance of 3.3 mOhm. This component is classified as Active and is ROHS3 compliant. The part is supplied in Tape & Reel packaging with 986 units currently in stock.

Substitute parts are identified when equivalent electrical performance can be maintained within the specified parameter tolerances for this inductance value and current rating category. The PA4341.331NLT from Pulse Electronics represents a direct functional alternative meeting the core electrical requirements.

Key Parameters

Parameter	Value	Unit
Inductance	330	nH
Inductance Tolerance	±20%	-
Current Rating (Continuous)	22	A
DC Resistance (Maximum)	3.3	mOhm
Shielding	Shielded	-
Operating Temperature Range	-55°C to 125°C	-
Mounting Type	Surface Mount	-
Package Type	Nonstandard	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the CMLB063T-R33MS is determined by the following critical parameters:

Inductance value must match at 330 nH with ±20% tolerance specification. Current rating must support the application requirement; the substitute part must maintain saturation current performance within acceptable operating margins. DC resistance must remain within acceptable limits to prevent thermal and efficiency degradation in the circuit. Shielding type must be maintained to preserve electromagnetic compatibility characteristics. Operating temperature range must encompass the application environment. Surface mount configuration and nonstandard package dimensions must be compatible with PCB layout constraints.

The PA4341.331NLT meets these substitution criteria with matching inductance, shielded construction, surface mount configuration, and overlapping temperature range.

Parameter Comparison

Parameter	CMLB063T-R33MS	PA4341.331NLT	Compatibility
Manufacturer	Delta Electronics/Cyntec	Pulse Electronics	Different manufacturer
Inductance	330 nH	330 nH	Matched
Inductance Tolerance	±20%	±20%	Matched
Current Rating	22 A	20 A	Substitute rated 2 A lower
Current - Saturation	22 A	32 A	Substitute has higher saturation margin
DC Resistance (Maximum)	3.3 mOhm	3.9 mOhm	Substitute 0.6 mOhm higher
Shielding	Shielded	Shielded	Matched
Operating Temperature	-55°C to 125°C	-40°C to 125°C	Substitute range narrower at low end
Mounting Type	Surface Mount	Surface Mount	Matched
Package Type	Nonstandard	Nonstandard	Matched
Size / Dimension	6.95mm L x 6.60mm W	7.60mm L x 6.90mm W	Substitute slightly larger
Height - Seated	3.00 mm	3.00 mm	Matched
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Matched
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Matched
Product Status	Active	Active	Both active

Engineering Selection Recommendations

Both the CMLB063T-R33MS and PA4341.331NLT are Active products with ROHS3 compliance and MSL Level 1 rating, ensuring regulatory and environmental compatibility. The PA4341.331NLT carries AEC-Q200 qualification, indicating automotive-grade reliability standards.

Selection between these parts depends on application current requirements. The CMLB063T-R33MS supports 22 A continuous current, while the PA4341.331NLT is rated for 20 A. Applications requiring the full 22 A rating must use the CMLB063T-R33MS. For applications operating at 20 A or below, the PA4341.331NLT provides equivalent performance with higher saturation current margin (32 A versus 22 A).

DC resistance difference of 0.6 mOhm between parts may be significant in low-impedance circuits; thermal and efficiency calculations should account for this variance. Operating temperature range differs at the lower extreme; applications requiring -55°C operation must use the CMLB063T-R33MS. Physical dimensions are slightly larger for the PA4341.331NLT; PCB layout compatibility must be verified before substitution.

Frequently Asked Questions (FAQ)

Q: Can PA4341.331NLT replace CMLB063T-R33MS in all applications?

A: Substitution is valid only when application current does not exceed 20 A continuous. Applications requiring the full 22 A rating must use the original CMLB063T-R33MS. Operating temperature range must also be verified; if -55°C operation is required, the CMLB063T-R33MS is mandatory.

Q: What is the impact of the 0.6 mOhm DC resistance difference?

A: In circuits with high current flow, the additional 0.6 mOhm resistance in the PA4341.331NLT will generate proportionally higher resistive losses. At 20 A, this represents approximately 0.24 mW additional power dissipation. Circuit thermal analysis should account for this difference.

Q: Are the physical dimensions compatible?

A: The PA4341.331NLT is 0.65 mm longer and 0.30 mm wider than the CMLB063T-R33MS. Both maintain the same 3.00 mm seated height. PCB footprint and layout clearances must be verified to ensure the substitute part fits within design constraints.

Q: Do both parts meet the same compliance standards?

A: Both parts are ROHS3 compliant with MSL Level 1 rating. The PA4341.331NLT additionally carries AEC-Q200 automotive qualification. Both are classified as Active products with unlimited moisture sensitivity protection.

Q: What is the saturation current difference significance?

A: The PA4341.331NLT has a saturation current of 32 A compared to 22 A for the CMLB063T-R33MS. This provides greater margin against core saturation in the substitute part, which is advantageous for transient current conditions, though both parts are rated for their respective continuous current limits.

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