CML0306-18N-JNH Equivalent & Substitute Parts

Part Overview

The CML0306-18N-JNH is a 18 nH shielded thin film inductor manufactured by Delta Electronics/Cyntec, rated for 160 mA with a maximum DC resistance of 1.7 Ohm. This component is designed for surface mount applications in the 0201 (0603 Metric) package format. The product is currently obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity.

Substiute Parts

CML0306-18N-JNH

Delta Electronics/CyntecIn Stock: 1099CML0306-18N-JNH Datasheet

Current PartRFQ

LQP03TN18NJ02D

Murata ElectronicsIn Stock: 15296LQP03TN18NJ02D Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CML0306-18N-JNH is determined by the following critical parameters:

• Inductance value: 18 nH (exact match required)
• Inductance tolerance: ±5% (matching tolerance specification)
• Package / Case: 0201 (0603 Metric) (physical compatibility requirement)
• Current Rating: minimum 160 mA (equal or higher acceptable)
• DC Resistance: maximum 1.7 Ohm (equal or lower acceptable)
• Operating Temperature Range: minimum -40°C ~ 85°C coverage (equal or wider acceptable)
• RoHS Compliance: required for regulatory compatibility

The LQP03TN18NJ02D from Murata Electronics meets these substitution criteria with identical inductance, tolerance, and package specifications, while providing superior current rating (200 mA) and lower DC resistance (800 mOhm).

Parameter Comparison

Engineering Selection Recommendations

The LQP03TN18NJ02D is a qualified substitute for the obsolete CML0306-18N-JNH based on the following engineering criteria:

• Both components maintain identical inductance (18 nH) and tolerance (±5%), ensuring circuit performance equivalence
• The substitute provides enhanced electrical performance with lower DC resistance (800 mOhm vs. 1.7 Ohm) and higher current rating (200 mA vs. 160 mA)
• Both components are RoHS compliant with MSL 1 rating, meeting regulatory and environmental requirements
• The substitute offers extended operating temperature range (-55°C ~ 125°C vs. -40°C ~ 85°C), providing broader application flexibility
• Active product status of the substitute ensures long-term availability and supply chain continuity

The primary design consideration is the difference in shielding: the main part is shielded while the substitute is unshielded. This difference must be evaluated based on specific circuit electromagnetic interference (EMI) requirements.

Frequently Asked Questions (FAQ)

Q: Can the LQP03TN18NJ02D directly replace the CML0306-18N-JNH in all applications?

A: Direct replacement is possible for applications where unshielded inductors are acceptable. The substitute meets or exceeds all critical electrical parameters (inductance, tolerance, current rating, DC resistance) and maintains identical package dimensions. However, if EMI shielding is a circuit requirement, the unshielded design of the substitute must be evaluated against your specific noise immunity specifications.

Q: What are the key differences between these two inductors?

A: The main differences are: (1) Shielding type—the original is shielded, the substitute is unshielded; (2) Construction type—thin film vs. thick film; (3) DC resistance—1.7 Ohm vs. 800 mOhm; (4) Current rating—160 mA vs. 200 mA; (5) Product status—obsolete vs. active. The substitute provides superior electrical performance and supply availability.

Q: Are both components in the same physical package?

A: Yes. Both components use the 0201 (0603 Metric) package with identical dimensions (0.024" L x 0.012" W, 0.61mm x 0.31mm) and maximum seated height (0.013" / 0.33mm), ensuring mechanical compatibility on PCBs.

Q: What is the significance of the different operating temperature ranges?

A: The substitute's extended range (-55°C ~ 125°C vs. -40°C ~ 85°C) provides broader environmental coverage. If your application operates within the original range (-40°C ~ 85°C), both components are suitable. For applications requiring extended temperature operation, the substitute offers additional flexibility.

Q: How do the Q factor specifications compare?

A: The original part specifies Q @ 100 MHz (value: 4), while the substitute specifies Q @ 500 MHz (value: 12). These measurements are taken at different frequencies, making direct comparison inappropriate. Both values are within typical ranges for their respective inductor types and frequencies.

Q: Are there any compliance or certification differences?

A: Both components are RoHS compliant and REACH unaffected. The substitute carries ROHS3 compliance, which represents the current RoHS standard. Both have MSL 1 (Unlimited) moisture sensitivity ratings, indicating no special storage requirements.