CML0306-3N0-CNH Equivalent & Substitute Parts

Part Overview

The CML0306-3N0-CNH is a 3 nH shielded thin film inductor manufactured by Delta Electronics/Cyntec, rated for 450 mA with a maximum DC resistance of 300 mOhm. This component is packaged in 0201 (0603 Metric) surface mount format and operates across the temperature range of -40°C to 85°C. The part is currently obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

CML0306-3N0-CNH

Delta Electronics/CyntecIn Stock: 711CML0306-3N0-CNH Datasheet

Current PartRFQ

LQP03TN3N0B02D

Murata ElectronicsIn Stock: 395462LQP03TN3N0B02D Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CML0306-3N0-CNH is determined by the following critical parameters:

Inductance Value: Both the main part and substitute must maintain 3 nH inductance to ensure circuit functionality.

Current Rating: The substitute must support a minimum of 450 mA to meet load requirements.

Package Format: The 0201 (0603 Metric) surface mount package is mandatory for mechanical and electrical compatibility with existing PCB layouts.

Operating Temperature Range: The substitute must cover or exceed the specified temperature window to ensure reliable operation across environmental conditions.

DC Resistance: Lower or equivalent DC resistance values are acceptable; higher values may impact circuit performance.

The LQP03TN3N0B02D from Murata Electronics meets these substitution criteria. While it differs in shielding type (unshielded versus shielded) and construction method (thick film versus thin film), these differences do not preclude substitution when electromagnetic interference is not a critical design constraint.

Parameter Comparison

Engineering Selection Recommendations

The LQP03TN3N0B02D is a suitable substitute for the obsolete CML0306-3N0-CNH based on the following factors:

Electrical Compatibility: Both components share identical inductance values (3 nH) and current ratings (450 mA). The substitute exhibits lower DC resistance (250 mOhm versus 300 mOhm), which represents an improvement in performance characteristics.

Package Compatibility: Both parts utilize the 0201 (0603 Metric) surface mount package, ensuring direct PCB footprint compatibility without layout modifications.

Compliance Status: The LQP03TN3N0B02D maintains active product status with ROHS3 compliance, providing long-term supply chain availability and regulatory alignment. Both components are REACH unaffected.

Temperature Performance: The substitute supports an extended operating temperature range (-55°C to 125°C) compared to the main part (-40°C to 85°C), offering greater thermal margin for demanding applications.

Design Consideration: The primary difference is shielding. The main part is shielded while the substitute is unshielded. In applications where electromagnetic shielding is not a design requirement, this substitution presents no functional limitation. In circuits requiring shielding for noise immunity, alternative shielded inductors at 3 nH should be evaluated.

Frequently Asked Questions (FAQ)

Q: Can the LQP03TN3N0B02D directly replace the CML0306-3N0-CNH without PCB modifications?

A: Yes. Both components use the 0201 (0603 Metric) surface mount package with identical footprint dimensions (0.024" L x 0.012" W, 0.61mm x 0.31mm). No PCB layout changes are required.

Q: What is the impact of switching from a shielded to an unshielded inductor?

A: Shielded inductors reduce electromagnetic radiation and susceptibility to external interference. Unshielded inductors may exhibit increased coupling to nearby circuit elements. Substitution is appropriate when EMI is not a critical design parameter. If shielding is required, alternative 3 nH shielded inductors must be sourced.

Q: Are there tolerance differences between these parts?

A: Yes. The CML0306-3N0-CNH has ±0.2 nH tolerance while the LQP03TN3N0B02D has ±0.1 nH tolerance. The substitute offers tighter tolerance control, which may improve circuit consistency.

Q: Does the lower DC resistance of the substitute affect circuit operation?

A: Lower DC resistance is generally beneficial, reducing resistive losses and heat generation. This represents an improvement over the original part specification.

Q: What is the difference between thin film and thick film construction?

A: Thin film inductors (CML0306) typically offer higher Q factors and better frequency stability. Thick film inductors (LQP03) provide robust construction and cost efficiency. Both technologies are suitable for 3 nH applications at 450 mA.

Q: Is the extended temperature range of the substitute a concern?

A: No. The substitute's extended range (-55°C to 125°C) encompasses the original part's range (-40°C to 85°C). This provides additional operational margin without introducing compatibility issues.