CDH53NP-680JC Equivalent & Substitute Parts

Part Overview

The CDH53NP-680JC is a 68 µH unshielded drum core wirewound inductor manufactured by Sumida America Components Inc. This surface mount component is rated for 450 mA continuous current with a maximum DC resistance of 1.21 Ohm and operates across the temperature range of -40°C to 100°C. The part is currently active in production and ROHS3 compliant.

Substitute parts are identified when equivalent inductance values, core materials, mounting types, and electrical performance parameters align within acceptable tolerances for the application. The CDH53NP-680JC has one qualified substitute in the Bourns Inc. product line.

Key Parameters

Parameter	Value	Unit
Inductance	68	µH
Current Rating	450	mA
DC Resistance (Max)	1.21	Ohm
Core Material	Ferrite	—
Shielding	Unshielded	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-40 to 100	°C
Inductance Tolerance	±5	%
Package Type	Nonstandard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the CDH53NP-680JC is determined by the following critical parameters:

Primary Matching Criteria:

Inductance value: 68 µH (exact match required)
Core type: Ferrite drum core, wirewound construction
Shielding configuration: Unshielded
Mounting technology: Surface mount
Package classification: Nonstandard

Secondary Compatibility Factors:

Current rating: Substitute must support the application's maximum current requirement
DC resistance: Lower or equivalent DCR values are acceptable
Operating temperature range: Substitute range must encompass or exceed the application requirement
Regulatory compliance: ROHS3 status required

The SDR6603-680M from Bourns Inc. meets all primary matching criteria with identical inductance and core specifications. Secondary parameters show acceptable variance within engineering tolerances for equivalent component selection.

Parameter Comparison

Parameter	CDH53NP-680JC (Sumida)	SDR6603-680M (Bourns)	Compatibility Notes
Inductance	68 µH	68 µH	Exact match
Inductance Tolerance	±5%	±20%	Main part has tighter tolerance
Current Rating	450 mA	400 mA	Substitute rated 50 mA lower
DC Resistance (Max)	1.21 Ohm	0.860 Ohm	Substitute has lower resistance
Core Material	Ferrite	Ferrite	Exact match
Shielding	Unshielded	Unshielded	Exact match
Mounting Type	Surface Mount	Surface Mount	Exact match
Operating Temperature Range	-40 to 100°C	-40 to 125°C	Substitute has extended upper range
Package / Case	Nonstandard	Nonstandard	Different physical dimensions
Size / Dimension (L x W)	6.00 x 5.20 mm	6.60 x 4.45 mm	Footprint differs; verify PCB layout
Height (Max)	3.20 mm	2.92 mm	Substitute is 0.28 mm shorter
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Both compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Exact match

Engineering Selection Recommendations

CDH53NP-680JC (Primary Component): The CDH53NP-680JC remains the specified component when the application requires the full 450 mA current rating and the tighter ±5% inductance tolerance. This part is active in production with ROHS3 compliance and unlimited moisture sensitivity rating, supporting long-term supply chain stability.

SDR6603-680M (Substitute Component): The SDR6603-680M from Bourns Inc. is suitable as a substitute when the application current requirement does not exceed 400 mA and the ±20% inductance tolerance is acceptable. The substitute offers lower DC resistance (0.860 Ohm vs. 1.21 Ohm), which reduces power dissipation in current-limited applications. The extended operating temperature range to 125°C provides additional thermal margin. Both components are ROHS3 compliant and carry unlimited moisture sensitivity rating.

Critical Substitution Constraint: The SDR6603-680M has different physical dimensions (6.60 x 4.45 mm vs. 6.00 x 5.20 mm footprint). PCB layout verification is mandatory before substitution to confirm pad spacing and clearance compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SDR6603-680M replace the CDH53NP-680JC in all applications?

A: No. The SDR6603-680M is rated for 400 mA maximum current, compared to the CDH53NP-680JC's 450 mA rating. Substitution is valid only when the application current requirement does not exceed 400 mA. Additionally, the ±20% inductance tolerance of the substitute is wider than the ±5% tolerance of the primary part.

Q: What are the physical dimension differences between these parts?

A: The CDH53NP-680JC measures 6.00 mm length × 5.20 mm width × 3.20 mm height (max). The SDR6603-680M measures 6.60 mm length × 4.45 mm width × 2.92 mm height (max). The substitute is 0.60 mm longer, 0.75 mm narrower, and 0.28 mm shorter. PCB layout must be verified for pad spacing and component clearance before substitution.

Q: Are both parts RoHS compliant?

A: Yes. Both the CDH53NP-680JC and SDR6603-680M are ROHS3 compliant and carry moisture sensitivity level 1 (unlimited), meeting current regulatory requirements.

Q: What is the inductance tolerance difference, and does it matter?

A: The CDH53NP-680JC has ±5% inductance tolerance, while the SDR6603-680M has ±20% tolerance. The primary part offers tighter tolerance control. Applications requiring precise inductance values should use the CDH53NP-680JC. Applications with wider tolerance margins can accept the substitute.

Q: Does the lower DC resistance of the SDR6603-680M provide an advantage?

A: The SDR6603-680M has 0.860 Ohm maximum DC resistance compared to 1.21 Ohm for the CDH53NP-680JC. Lower resistance reduces I²R power dissipation and heat generation. This is advantageous in current-limited applications but does not affect inductance performance.

Q: What is the operating temperature range difference?

A: The CDH53NP-680JC operates from -40°C to 100°C. The SDR6603-680M operates from -40°C to 125°C. The substitute provides 25°C additional upper temperature margin, beneficial for high-temperature environments.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message