CML0306-3N9-CNH Equivalent & Substitute Parts

Part Overview

The CML0306-3N9-CNH is a 3.9 nH shielded thin film inductor manufactured by Delta Electronics/Cyntec, designed for surface mount applications in the 0201 (0603 Metric) package. This component is rated for 350 mA maximum current with 400mOhm DC resistance and operates across -40°C to 85°C. The part is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing production and maintenance applications.

Substiute Parts

CML0306-3N9-CNH

Delta Electronics/CyntecIn Stock: 1184CML0306-3N9-CNH Datasheet

Current PartRFQ

LQP03TN3N9C02D

Murata ElectronicsIn Stock: 18156LQP03TN3N9C02D Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CML0306-3N9-CNH is determined by the following critical parameters:

• Inductance Value: Must be 3.9 nH with ±0.2 nH tolerance
• Package / Case: Must be 0201 (0603 Metric) surface mount
• Current Rating: Must meet or exceed 350 mA
• DC Resistance: Must not exceed 400 mOhm
• Operating Temperature Range: Must cover the required -40°C to 85°C minimum
• RoHS Compliance: Must maintain RoHS compliance status
• Moisture Sensitivity: Must be MSL 1 or equivalent

The LQP03TN3N9C02D from Murata Electronics meets all substitution criteria. While it differs in shielding type (unshielded vs. shielded) and construction method (thick film vs. thin film), these differences do not prevent functional equivalence when the electrical parameters align within specification.

Parameter Comparison

Engineering Selection Recommendations

The LQP03TN3N9C02D is a direct functional equivalent for the obsolete CML0306-3N9-CNH based on the following factors:

• Both components maintain identical inductance values and tolerances (3.9 nH ±0.2 nH)
• The substitute provides superior current rating (400 mA vs. 350 mA) and lower DC resistance (300 mOhm vs. 400 mOhm)
• Operating temperature range of the substitute (-55°C to 125°C) exceeds the original specification (-40°C to 85°C)
• Both components are RoHS compliant and carry MSL 1 moisture sensitivity rating
• The substitute is currently in active production with substantial inventory availability (18,050 pcs)
• Both components are packaged identically in 0201 (0603 Metric) surface mount format

The primary design consideration is the difference in shielding: the original part is shielded while the substitute is unshielded. Circuit-level evaluation is required to determine if unshielded operation is acceptable for the intended application.

Frequently Asked Questions (FAQ)

Q: Can the LQP03TN3N9C02D replace the CML0306-3N9-CNH in all applications?

A: The LQP03TN3N9C02D meets all core electrical specifications and exceeds performance in current rating and DC resistance. However, the change from shielded to unshielded construction may affect electromagnetic interference characteristics. Applications requiring shielding for noise suppression or EMI compliance must be evaluated individually.

Q: What is the difference between shielded and unshielded inductors?

A: Shielded inductors contain a magnetic shield that confines the magnetic field, reducing coupling to nearby components and external interference. Unshielded inductors have no such containment. The choice depends on circuit layout, proximity to sensitive components, and EMI requirements.

Q: Are the physical dimensions compatible?

A: Yes. Both components use the 0201 (0603 Metric) package with identical footprints: 0.024" L x 0.012" W (0.60-0.61mm x 0.30-0.31mm) and maximum seated height of 0.013" (0.33mm).

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

A: Thin film inductors use photolithographic deposition on a substrate, typically offering tighter tolerances and lower DCR. Thick film inductors use screen-printed conductive patterns. Both technologies can achieve the same inductance value; the choice affects cost, performance characteristics, and manufacturing process.

Q: Is the substitute part available in the same packaging format?

A: The LQP03TN3N9C02D is available in Tape & Reel (TR) packaging, which is standard for high-volume surface mount assembly. The original CML0306-3N9-CNH packaging format is not specified in the provided data.

Q: Do both parts meet current regulatory requirements?

A: Yes. Both components are RoHS compliant and REACH unaffected. The substitute carries ROHS3 certification, indicating compliance with the latest RoHS directive revisions.