CDH53-120LC Equivalent & Substitute Parts

Part Overview

The CDH53-120LC is a 12 µH unshielded drum core wirewound inductor manufactured by Sumida America Components Inc. This surface mount component is rated for 1.12 A continuous current with a maximum DC resistance of 180 mOhm and operates across the temperature range of -30°C to 100°C. The part is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Inductance	12 µH
Inductance Tolerance	±15%
Current Rating	1.12 A
DC Resistance (DCR)	180 mOhm Max
Core Material	Ferrite
Shielding	Unshielded
Mounting Type	Surface Mount
Physical Dimensions	6.00 mm L × 5.20 mm W × 3.20 mm H
Operating Temperature Range	-30°C to 100°C
Inductance Test Frequency	1 kHz

Substitute Part Grouping Explanation

Substitution of the CDH53-120LC is determined by strict equivalence across the following electrical and mechanical parameters:

Inductance Value: 12 µH at 1 kHz test frequency
Inductance Tolerance: ±15%
Current Rating: 1.12 A minimum
DC Resistance: 180 mOhm maximum
Core Type: Ferrite drum core, unshielded
Mounting: Surface mount configuration
Physical Footprint: 6.00 mm × 5.20 mm × 3.20 mm maximum height
Temperature Range: Minimum -30°C to 100°C operation

The CDH53NP-120LC qualifies as a direct substitute because it maintains identical electrical specifications and physical dimensions while offering improved product status and regulatory compliance.

Parameter Comparison

Parameter	CDH53-120LC (Main Part)	CDH53NP-120LC (Substitute)	Match Status
Inductance	12 µH	12 µH	Identical
Inductance Tolerance	±15%	±15%	Identical
Current Rating (Amps)	1.12 A	1.12 A	Identical
DC Resistance (DCR)	180 mOhm Max	180 mOhm Max	Identical
Core Material	Ferrite	Ferrite	Identical
Shielding	Unshielded	Unshielded	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Size / Dimension	6.00 mm L × 5.20 mm W	6.00 mm L × 5.20 mm W	Identical
Height - Seated (Max)	3.20 mm	3.20 mm	Identical
Operating Temperature	-30°C ~ 100°C	-40°C ~ 100°C	Substitute Exceeds
Inductance Frequency - Test	1 kHz	1 kHz	Identical
Product Status	Obsolete	Active	Substitute Active
Packaging	Nonstandard	Tape & Reel (TR)	Substitute Improved
RoHS Status	RoHS Non-Compliant	ROHS3 Compliant	Substitute Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Identical

Engineering Selection Recommendations

The CDH53NP-120LC is the direct equivalent substitute for the obsolete CDH53-120LC. Selection of the substitute part is supported by the following factors:

Electrical Equivalence: All critical electrical parameters—inductance value, tolerance, current rating, and DC resistance—are identical between the main part and substitute. This ensures functional interchangeability in circuit applications without performance degradation.

Mechanical Compatibility: Physical dimensions and mounting footprint are identical, enabling direct PCB layout compatibility without redesign.

Product Status: The CDH53NP-120LC maintains active product status with current manufacturing support, eliminating supply chain risk associated with the obsolete CDH53-120LC.

Regulatory Compliance: The substitute part is ROHS3 compliant, whereas the main part is RoHS non-compliant. This compliance improvement aligns with current environmental and procurement standards.

Temperature Range Enhancement: The substitute part extends the lower operating temperature limit to -40°C, providing broader thermal operating capability while maintaining the upper limit at 100°C.

Packaging Improvement: The substitute is supplied in standard Tape & Reel (TR) packaging, facilitating automated assembly processes compared to nonstandard packaging of the main part.

Frequently Asked Questions (FAQ)

Q: Can CDH53NP-120LC be used as a direct replacement for CDH53-120LC in existing designs?

A: Yes. The CDH53NP-120LC is electrically and mechanically identical to the CDH53-120LC across all specified parameters. No circuit modifications or PCB layout changes are required for substitution.

Q: What is the difference between the two part numbers?

A: The primary differences are product status, regulatory compliance, and packaging format. The CDH53NP-120LC is an active product with ROHS3 compliance and Tape & Reel packaging, while the CDH53-120LC is obsolete with RoHS non-compliance and nonstandard packaging. Electrical and mechanical specifications are identical.

Q: Does the extended temperature range of CDH53NP-120LC affect circuit performance?

A: No. The extended lower temperature limit (-40°C versus -30°C) represents an expansion of the operating envelope. The inductance value, tolerance, current rating, and DC resistance remain unchanged across the specified temperature ranges.

Q: Are there any compatibility issues with automated assembly equipment?

A: No. The CDH53NP-120LC is supplied in standard Tape & Reel (TR) packaging, which is compatible with standard pick-and-place assembly equipment. The nonstandard packaging of the main part may require manual handling or specialized equipment.

Q: Is RoHS3 compliance a functional requirement for substitution?

A: RoHS3 compliance is a regulatory and procurement requirement rather than a functional electrical requirement. The substitute part's compliance status makes it suitable for applications subject to environmental regulations and modern procurement standards.

Q: What is the inventory status of the substitute part?

A: The CDH53NP-120LC has 937 pieces in new original stock, providing adequate supply availability for procurement and production planning.

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