CDRH4D29LDNP-4R7PC Equivalent & Substitute Parts

Part Overview

The CDRH4D29LDNP-4R7PC is a 4.7 µH shielded ferrite inductor manufactured by Sumida America Components Inc., rated for 2.8 A continuous current with a maximum DC resistance of 35.4 mOhm. This surface mount component operates across the temperature range of -40°C to 105°C and is classified as Active product status. Substitute parts are identified when the main part becomes unavailable, when inventory constraints require alternative sourcing, or when design flexibility permits selection from qualified equivalent components that meet the same electrical and mechanical specifications within defined tolerances.

Key Parameters

Parameter	Value	Unit
Inductance	4.7	µH
Inductance Tolerance	±25%	-
Current Rating	2.8	A
Saturation Current (Isat)	1.3	A
DC Resistance (DCR) Maximum	35.4	mOhm
Shielding	Shielded	-
Operating Temperature Range	-40 to 105	°C
Mounting Type	Surface Mount	-
Package Type	Nonstandard	-
Physical Size	4.90 x 4.90 x 3.00	mm
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution eligibility for the CDRH4D29LDNP-4R7PC is determined by the following critical parameters:

Inductance Value: The substitute part must provide 4.7 µH inductance. The CDRH4D29LDNP-4R7PC specifies ±25% tolerance, establishing the acceptable inductance range.

Current Rating: The substitute part must support the application's current requirements. The main part is rated for 2.8 A continuous current with a saturation current of 1.3 A.

DC Resistance: Maximum DCR of 35.4 mOhm establishes the upper limit for acceptable resistance in substitute components.

Shielding: The main part is shielded; substitute parts must maintain shielded construction to preserve electromagnetic isolation characteristics.

Operating Temperature Range: The main part operates from -40°C to 105°C. Substitute parts must support this temperature envelope or exceed it.

Mounting and Package: Both components must be surface mount with compatible physical dimensions and terminal configurations suitable for the same PCB layout.

Compliance: RoHS3 compliance and MSL rating must be maintained.

The PA4322.472NLT from Pulse Electronics qualifies as a substitute based on matching inductance value, shielded construction, surface mount configuration, compatible physical footprint, and equivalent compliance certifications.

Parameter Comparison

Parameter	CDRH4D29LDNP-4R7PC (Main)	PA4322.472NLT (Substitute)	Compatibility Notes
Manufacturer	Sumida America Components Inc.	Pulse Electronics	Different manufacturers
Inductance	4.7 µH	4.7 µH	Matched
Inductance Tolerance	±25%	±20%	Substitute has tighter tolerance
Current Rating	2.8 A	1.32 A	Substitute rated lower; verify application requirements
Saturation Current (Isat)	1.3 A	1.08 A	Substitute has lower saturation point
DC Resistance (DCR) Maximum	35.4 mOhm	38 mOhm	Substitute within acceptable range
Shielding	Shielded	Shielded	Matched
Operating Temperature Range	-40 to 105°C	-40 to 125°C	Substitute supports extended upper range
Mounting Type	Surface Mount	Surface Mount	Matched
Physical Size (L x W x H)	4.90 x 4.90 x 3.00 mm	5.10 x 5.10 x 3.10 mm	Slight dimensional variation; verify PCB layout compatibility
Package Type	Nonstandard	Nonstandard, Corner Terminals	Different terminal configuration
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Matched
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Matched
Product Status	Active	Active	Both actively manufactured

Engineering Selection Recommendations

Primary Consideration - Current Rating Differential: The PA4322.472NLT substitute is rated for 1.32 A continuous current, compared to the main part's 2.8 A rating. This represents a significant reduction in current-handling capacity. Selection of the substitute is permissible only in applications where the actual operating current does not exceed 1.32 A and where the saturation current of 1.08 A provides adequate margin above peak transient currents.

Physical Footprint Verification: The substitute part measures 5.10 x 5.10 x 3.10 mm versus the main part's 4.90 x 4.90 x 3.00 mm. While the dimensional difference is modest, PCB layout compatibility must be confirmed, particularly regarding trace routing, component clearances, and thermal management considerations.

Terminal Configuration: The PA4322.472NLT features corner terminals, whereas the main part does not specify this detail. PCB pad layout and solder joint design must accommodate this terminal configuration difference.

Compliance and Reliability: Both components maintain ROHS3 compliance, MSL Level 1 rating, and Active product status, ensuring continued availability and regulatory alignment. The substitute's extended operating temperature range to 125°C provides additional thermal margin beyond the main part's 105°C maximum.

DC Resistance: The substitute's 38 mOhm maximum DCR is marginally higher than the main part's 35.4 mOhm specification. In power delivery applications where resistive losses are critical, this 2.6 mOhm difference may require thermal analysis to confirm acceptable performance.

Frequently Asked Questions (FAQ)

Q: Can the PA4322.472NLT be used as a direct replacement for the CDRH4D29LDNP-4R7PC in all applications?

A: No. The substitute part has a lower current rating (1.32 A versus 2.8 A) and lower saturation current (1.08 A versus 1.3 A). Substitution is valid only when the application's actual operating current remains below 1.32 A with adequate margin above saturation current. Applications requiring the full 2.8 A rating must use the original part.

Q: What is the significance of the inductance tolerance difference (±25% versus ±20%)?

A: The substitute part's ±20% tolerance is tighter than the main part's ±25% tolerance. This means the substitute will maintain inductance value within a narrower range, which may be beneficial in precision applications but does not affect substitution eligibility since both fall within acceptable inductance specifications.

Q: Are the physical dimension differences critical?

A: The substitute is slightly larger (5.10 x 5.10 x 3.10 mm versus 4.90 x 4.90 x 3.00 mm). PCB layout must be verified to ensure the larger footprint does not create clearance conflicts with adjacent components, traces, or thermal management features. The corner terminal configuration also requires pad layout confirmation.

Q: How does the DC resistance difference affect circuit performance?

A: The substitute's 38 mOhm maximum DCR is 2.6 mOhm higher than the main part's 35.4 mOhm. In applications where resistive losses directly impact efficiency or thermal performance, this difference should be evaluated through circuit simulation or thermal analysis. For most general-purpose applications, this difference is negligible.

Q: What is the impact of the extended operating temperature range in the substitute?

A: The PA4322.472NLT operates to 125°C versus the main part's 105°C maximum. This extended range provides additional thermal margin and may be advantageous in high-temperature environments, but does not affect substitution in applications operating within the main part's -40°C to 105°C range.

Q: Are both parts equally available?

A: Both components are listed as Active product status with current inventory. The main part has 3378 pieces in stock; the substitute has 4787 pieces in stock. Availability may vary by distributor and time period.

Q: What compliance certifications apply to both parts?

A: Both the CDRH4D29LDNP-4R7PC and PA4322.472NLT are ROHS3 compliant, carry MSL Level 1 (Unlimited) moisture sensitivity rating, and are classified under ECCN EAR99 for export purposes. The substitute additionally carries REACH Unaffected status.

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