CDH53NP-470KC Equivalent & Substitute Parts

Part Overview

The CDH53NP-470KC is a 47 µH unshielded drum core wirewound inductor manufactured by Sumida America Components Inc. This surface mount component is rated for 530 mA continuous current with a maximum DC resistance of 770 mOhm. The part is currently active in production and available in high volume inventory. Equivalent and substitute parts are identified to provide design flexibility, supply chain alternatives, and component availability options for applications requiring 47 µH inductance in nonstandard surface mount packages.

Key Parameters

Parameter	Value
Inductance	47 µH
Inductance Tolerance	±10%
Current Rating	530 mA
DC Resistance (DCR)	770 mOhm Max
Core Type	Ferrite Drum Core
Shielding	Unshielded
Operating Temperature Range	-40°C to 100°C
Mounting Type	Surface Mount
Package Type	Nonstandard
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CDH53NP-470KC is determined by the following critical parameters:

Primary Matching Criteria:

Inductance value: 47 µH (exact match required)
Core material: Ferrite drum core
Shielding configuration: Unshielded
Mounting type: Surface Mount
Package classification: Nonstandard

Secondary Compatibility Parameters:

Current rating: Substitute must support minimum 500 mA (within 94% of original 530 mA specification)
DC resistance: Substitute must not exceed 770 mOhm maximum
Operating temperature range: Substitute must cover minimum -40°C to 100°C
RoHS compliance: ROHS3 Compliant status required
Moisture sensitivity: MSL 1 classification

The SDR6603-470M from Bourns Inc. meets all primary matching criteria and operates within acceptable secondary parameters for direct substitution in applications where the specified tolerances and current ratings are compatible.

Parameter Comparison

Parameter	CDH53NP-470KC (Sumida)	SDR6603-470M (Bourns)	Compatibility Notes
Inductance	47 µH	47 µH	Exact match
Inductance Tolerance	±10%	±20%	Bourns part has wider tolerance
Current Rating (Amps)	530 mA	500 mA	Bourns rated 30 mA lower
DC Resistance (DCR)	770 mOhm Max	640 mOhm Max	Bourns has lower resistance
Core Type	Ferrite Drum Core	Ferrite Drum Core	Exact match
Shielding	Unshielded	Unshielded	Exact match
Operating Temperature Range	-40°C to 100°C	-40°C to 125°C	Bourns has extended upper limit
Mounting Type	Surface Mount	Surface Mount	Exact match
Package Type	Nonstandard	Nonstandard	Exact match
Size / Dimension	6.00mm L x 5.20mm W	6.60mm L x 4.45mm W	Slight dimensional variation
Height - Seated (Max)	3.20mm	2.92mm	Bourns part is 0.28mm shorter
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Exact match
Moisture Sensitivity Level	MSL 1 (Unlimited)	MSL 1 (Unlimited)	Exact match

Engineering Selection Recommendations

CDH53NP-470KC Selection Criteria:

Applications requiring 530 mA continuous current rating
Designs with strict inductance tolerance requirements (±10%)
Circuits operating within -40°C to 100°C temperature range
PCB layouts with specific height constraints of 3.20mm maximum

SDR6603-470M Selection Criteria:

Applications with 500 mA maximum current requirement
Designs tolerating ±20% inductance variation
Circuits benefiting from extended temperature operation to 125°C
PCB layouts with reduced height constraints (2.92mm maximum)
Applications where lower DC resistance (640 mOhm) provides thermal or efficiency advantages

Both parts maintain ROHS3 compliance and MSL 1 moisture sensitivity classification. Selection between these components depends on specific application current requirements, tolerance specifications, and physical space constraints on the printed circuit board.

Frequently Asked Questions (FAQ)

Q: Can SDR6603-470M directly replace CDH53NP-470KC in all applications?

A: Direct replacement is possible only when the application current requirement does not exceed 500 mA. The CDH53NP-470KC is rated for 530 mA, while the SDR6603-470M is rated for 500 mA. Applications operating at currents between 500 mA and 530 mA require the original CDH53NP-470KC specification.

Q: What is the impact of the ±20% tolerance on SDR6603-470M versus ±10% on CDH53NP-470KC?

A: The SDR6603-470M tolerance of ±20% means the actual inductance can range from 37.6 µH to 56.4 µH. The CDH53NP-470KC tolerance of ±10% constrains the range to 42.3 µH to 51.7 µH. Applications with strict inductance specifications require the tighter tolerance of the CDH53NP-470KC.

Q: Are there physical compatibility issues between these two parts?

A: Yes. The SDR6603-470M has different dimensions (6.60mm L x 4.45mm W x 2.92mm H) compared to the CDH53NP-470KC (6.00mm L x 5.20mm W x 3.20mm H). PCB footprints and height clearances must be verified before substitution. The Bourns part is 0.28mm shorter in height but 0.60mm longer in length.

Q: Do both parts meet the same compliance standards?

A: Yes. Both CDH53NP-470KC and SDR6603-470M are ROHS3 compliant with MSL 1 moisture sensitivity classification. Both carry EAR99 ECCN designation and fall under HTSUS code 8504.50.4000.

Q: What is the DC resistance difference between these parts?

A: The CDH53NP-470KC has a maximum DC resistance of 770 mOhm, while the SDR6603-470M has a maximum of 640 mOhm. The lower resistance of the Bourns part results in reduced power dissipation and heat generation in the inductor.

Q: Which part should be selected for high-temperature applications?

A: The SDR6603-470M supports operation to 125°C, compared to 100°C for the CDH53NP-470KC. For applications requiring extended temperature operation above 100°C, the Bourns part is the appropriate selection, provided current and tolerance requirements are met.

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