CDH113NP-330LC Equivalent & Substitute Parts

Part Overview

The CDH113NP-330LC is a 33 µH unshielded wirewound inductor manufactured by Sumida America Components Inc., rated for 1.05 A maximum current with 150mOhm DC resistance. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and production continuity. The part operates across a temperature range of -30°C to 100°C and is mounted as a surface mount device in a nonstandard package measuring 11.20mm × 11.00mm × 3.70mm (max height).

Substiute Parts

CDH113NP-330LC

Sumida America Components Inc.In Stock: 1100CDH113NP-330LC Datasheet

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CDH115NP-330LC

Sumida America Components Inc.In Stock: 983CDH115NP-330LC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDH113NP-330LC is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Inductance value: 33 µH (fixed requirement)
• Inductance tolerance: ±15% (matching specification)
• Mounting type: Surface Mount (required for PCB compatibility)
• Shielding configuration: Unshielded (electrical characteristic)
• Inductance test frequency: 1 kHz (measurement standard)

Mechanical Equivalence Criteria:

• Package footprint: 11.20mm × 11.00mm (identical X-Y dimensions required for PCB layout)
• Height constraint: Must accommodate 3.70mm seated height maximum
• Nonstandard package classification (consistent with original)

Compliance Criteria:

• RoHS3 compliance (environmental standard)
• MSL 1 rating (moisture sensitivity)

The CDH115NP-330LC qualifies as a substitute based on matching all electrical and mechanical core parameters while offering improved electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The CDH115NP-330LC is a qualified substitute for the obsolete CDH113NP-330LC based on the following engineering factors:

Electrical Performance: Both inductors maintain the 33 µH inductance specification at ±15% tolerance with identical 1 kHz test frequency. The CDH115NP-330LC provides superior electrical characteristics with 1.68 A current rating (versus 1.05 A) and reduced DC resistance of 82mOhm maximum (versus 150mOhm maximum), resulting in lower power dissipation and improved thermal performance in the same footprint.

Mechanical Compatibility: Identical PCB footprint dimensions (11.20mm × 11.00mm) ensure direct layout compatibility. The CDH115NP-330LC seated height of 5.20mm maximum exceeds the original 3.70mm specification; clearance verification against surrounding components is required before implementation.

Compliance & Availability: Both parts maintain ROHS3 compliance and MSL 1 moisture sensitivity rating. The CDH115NP-330LC is classified as active product status with documented inventory availability, addressing the obsolescence constraint of the original part.

Temperature Operating Range: The CDH115NP-330LC extends the lower operating temperature limit to -40°C (versus -30°C), providing broader environmental coverage.

Frequently Asked Questions (FAQ)

Q: Can the CDH115NP-330LC be used as a direct replacement for CDH113NP-330LC without PCB modification?

A: The identical 11.20mm × 11.00mm footprint permits direct pad-level substitution. However, the increased seated height of 5.20mm (versus 3.70mm) requires verification of clearance to adjacent components, solder bridges, or enclosure constraints. PCB layout review is mandatory before implementation.

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

A: Both inductors provide 33 µH inductance at ±15% tolerance. The CDH115NP-330LC offers improved performance with higher current rating (1.68 A versus 1.05 A) and lower DC resistance (82mOhm versus 150mOhm). These characteristics reduce resistive losses and heat generation during operation.

Q: Why is the CDH113NP-330LC classified as obsolete?

A: The CDH113NP-330LC is marked obsolete by the manufacturer. The CDH115NP-330LC represents the active product line continuation within the Sumida CDH series, offering equivalent inductance specifications with enhanced electrical performance.

Q: Are there any compliance or certification differences?

A: Both parts maintain identical ROHS3 compliance and MSL 1 moisture sensitivity ratings. No compliance barriers exist for substitution.

Q: What is the impact of the lower DC resistance on circuit performance?

A: Lower DC resistance (82mOhm versus 150mOhm) reduces I²R power dissipation in the inductor coil. For a 1.05 A circuit current, this represents approximately 0.092 mW lower dissipation, improving overall power efficiency and reducing thermal stress on the component.

Q: Is the extended temperature range (-40°C to 100°C) beneficial for all applications?

A: The extended lower temperature limit of -40°C provides operational capability in cold environment applications. Applications operating only within the original -30°C to 100°C range experience no functional change; the extended range represents additional design margin.