CMLB051H-1R0MS Equivalent & Substitute Parts

Part Overview

The CMLB051H-1R0MS is a 1 µH shielded inductor manufactured by Delta Electronics/Cyntec, rated for 8.5 A continuous current with a maximum DC resistance of 18mOhm. This surface mount component operates across the industrial temperature range of -55°C to 125°C and is ROHS3 compliant. The part is currently active in production with 653 units in stock. Substitute parts are identified when equivalent electrical performance can be maintained within the specified parameter tolerances while meeting application requirements.

Substiute Parts

CMLB051H-1R0MS

Delta Electronics/CyntecIn Stock: 749CMLB051H-1R0MS Datasheet

Current PartRFQ

PA4345.102NLT

Pulse ElectronicsIn Stock: 5572PA4345.102NLT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The PA4345.102NLT from Pulse Electronics qualifies as a direct substitute based on the following electrical and mechanical equivalencies:

Matching Parameters:

• Inductance: 1 µH (identical)
• Inductance Tolerance: ±20% (identical)
• Operating Temperature Range: -55°C to 125°C (identical)
• Shielding: Shielded (identical)
• Mounting Type: Surface Mount (identical)
• Inductance Test Frequency: 100 kHz (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)
• REACH Status: REACH Unaffected (identical)
• Packaging: Tape & Reel (TR) (identical)

Acceptable Parameter Variations:

• Current Rating: 7 A (substitute) vs. 8.5 A (main part) — substitute is rated lower; suitable for applications requiring ≤7 A
• DC Resistance: 20mOhm Max (substitute) vs. 18mOhm Max (main part) — substitute has marginally higher resistance within acceptable tolerance
• Saturation Current: 13.7 A (substitute) vs. 8.6 A (main part) — substitute provides higher saturation margin
• Physical Dimensions: Slight variations in length, width, and height; both are nonstandard packages

Parameter Comparison

Engineering Selection Recommendations

Both the CMLB051H-1R0MS and PA4345.102NLT are active production components with ROHS3 compliance and identical regulatory status (REACH Unaffected, ECCN EAR99). Selection between these parts depends on application current requirements:

• CMLB051H-1R0MS is the primary choice for applications requiring the full 8.5 A current rating and lower DC resistance (18mOhm).
• PA4345.102NLT is suitable for applications with maximum current requirements of 7 A or less. The substitute offers higher saturation current (13.7 A) and lower DC resistance relative to its current rating, making it appropriate for lower-current designs.

Physical dimensions differ slightly; the PA4345.102NLT is 0.60mm longer, 0.20mm wider, and 0.20mm taller. PCB layout and thermal management considerations must account for these dimensional variations.

Frequently Asked Questions (FAQ)

Q: Can PA4345.102NLT replace CMLB051H-1R0MS in all applications?

A: No. The PA4345.102NLT has a lower current rating (7 A vs. 8.5 A). It is suitable only for applications where the maximum continuous current does not exceed 7 A. If your application requires 8.5 A operation, the CMLB051H-1R0MS is required.

Q: What is the impact of the 2 mOhm higher DC resistance in the substitute?

A: The PA4345.102NLT has a maximum DC resistance of 20mOhm compared to 18mOhm for the main part. At 7 A, this results in approximately 0.98 W of power dissipation versus 0.98 W for the main part at the same current. Thermal design must account for this difference in applications operating near maximum current.

Q: Are the physical dimension differences significant?

A: The PA4345.102NLT is slightly larger (6.00mm L x 5.40mm W x 2.00mm H) compared to the CMLB051H-1R0MS (5.40mm L x 5.20mm W x 1.80mm H). PCB layout must accommodate these dimensions. Verify clearance in your design before substitution.

Q: Do both parts have identical temperature and compliance ratings?

A: Yes. Both operate across -55°C to 125°C, are ROHS3 compliant, REACH unaffected, and have MSL 1 (Unlimited) moisture sensitivity. Regulatory and environmental performance are equivalent.

Q: What is the difference in saturation current between these parts?

A: The PA4345.102NLT has a saturation current of 13.7 A compared to 8.6 A for the CMLB051H-1R0MS. This indicates the substitute can handle higher transient currents before saturation occurs, though its continuous current rating remains 7 A.