CDDFN10-3304N Equivalent & Substitute Parts

Part Overview

The CDDFN10-3304N is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for rail-to-rail steering protection in surface mount applications. This component features a 3.3V reverse standoff voltage with 20V clamping capability and 25A peak pulse current rating, making it suitable for Ethernet and similar high-speed interface protection. The part is currently listed as obsolete, necessitating identification of equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and field service applications.

Substiute Parts

CDDFN10-3304N

Bourns Inc.In Stock: 26207CDDFN10-3304N Datasheet

Current PartRFQ

CDDFN10-3304NA

Bourns Inc.In Stock: 1372CDDFN10-3304NA Datasheet

DirectRFQ

SP3304NUTG

Littelfuse Inc.In Stock: 34190SP3304NUTG Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDDFN10-3304N is determined by the following critical parameters:

Primary Compatibility Criteria:

• Reverse standoff voltage: 3.3V (Max)
• Unidirectional channel configuration: 4 channels
• Mounting type: Surface mount
• Package family: 10-pin DFN with exposed pad
• Clamping voltage range: Must not exceed application requirements
• Peak pulse current: Minimum 20A (8/20µs)
• Operating temperature: Must support -55°C minimum
• RoHS3 compliance and REACH unaffected status

Identified Substitute Categories:

Direct Manufacturer Equivalent: CDDFN10-3304NA (Bourns Inc.) — Same manufacturer, identical reverse standoff and breakdown voltages, reduced clamping voltage (18V), active product status, extended operating temperature to 150°C.

Cross-Manufacturer Alternative: SP3304NUTG (Littelfuse Inc.) — Matching reverse standoff voltage (3.3V), 4-channel steering configuration, reduced clamping voltage (11.5V) and peak pulse current (20A), improved moisture sensitivity rating (MSL 1), active product status.

Parameter Comparison

Engineering Selection Recommendations

CDDFN10-3304NA (Bourns Inc.) is the primary substitute for the obsolete CDDFN10-3304N. Both parts share identical reverse standoff voltage (3.3V), breakdown voltage (3.9V), and peak pulse current (25A) specifications. The CDDFN10-3304NA maintains the same package footprint (10-DFN 2.5x2.5) and pinout compatibility, requiring no PCB layout modifications. The reduced clamping voltage (18V versus 20V) provides tighter transient suppression, which is acceptable for applications where the original 20V specification was not a limiting constraint. Active product status ensures long-term availability. Both parts carry identical RoHS3 compliance and REACH unaffected certifications.

SP3304NUTG (Littelfuse Inc.) serves as a secondary cross-manufacturer alternative when CDDFN10-3304NA supply is unavailable. This part maintains the critical 3.3V reverse standoff voltage and 4-channel steering configuration. The reduced clamping voltage (11.5V) and peak pulse current (20A) represent lower performance specifications; this substitute is suitable only for applications where these reduced ratings do not exceed system requirements. The package footprint differs slightly (10-UDFN 2.6x2.6 versus 2.5x2.5), requiring PCB layout verification. Superior moisture sensitivity rating (MSL 1 versus MSL 3) provides manufacturing process advantages. Active product status and RoHS3 compliance are maintained.

Selection between CDDFN10-3304NA and SP3304NUTG depends on application clamping voltage requirements and PCB layout constraints. For designs requiring the full 20V clamping specification or where PCB space is constrained, CDDFN10-3304NA is the preferred choice. For applications tolerating lower clamping voltage and peak current, SP3304NUTG offers improved moisture handling characteristics.

Frequently Asked Questions (FAQ)

Q: Can CDDFN10-3304NA be used as a direct replacement for CDDFN10-3304N without PCB modifications?

A: Yes. Both parts use identical 10-DFN (2.5x2.5) package footprints and pinouts. No PCB layout changes are required. The reduced clamping voltage (18V versus 20V) is the only electrical difference and represents improved transient suppression performance.

Q: What are the key differences between CDDFN10-3304NA and SP3304NUTG?

A: The primary differences are clamping voltage (18V versus 11.5V), peak pulse current (25A versus 20A), package dimensions (2.5x2.5 versus 2.6x2.6), and moisture sensitivity rating (MSL 3 versus MSL 1). CDDFN10-3304NA maintains closer electrical performance to the original part. SP3304NUTG requires PCB layout verification due to package size variation.

Q: Is the SP3304NUTG package size difference (2.6x2.6 versus 2.5x2.5) significant for PCB layout?

A: The 0.1mm difference in each dimension is typically accommodated within standard PCB design tolerances. However, designs with tight component spacing or specific thermal management requirements should verify footprint compatibility before implementation.

Q: Do all substitute parts maintain RoHS3 compliance?

A: Yes. CDDFN10-3304NA and SP3304NUTG are both RoHS3 compliant and REACH unaffected, matching the compliance status of the original CDDFN10-3304N.

Q: Which substitute part should be selected for new production designs?

A: CDDFN10-3304NA is recommended for new production. It maintains the closest electrical and physical compatibility with the original part while offering active product status and long-term supply availability from Bourns Inc.

Q: Can SP3304NUTG be used in applications requiring 25A peak pulse current?

A: No. SP3304NUTG is rated for 20A peak pulse current (8/20µs), which is 5A lower than the original specification. Applications requiring the full 25A rating must use CDDFN10-3304NA or the original CDDFN10-3304N if available.

Q: What is the impact of the reduced clamping voltage in substitute parts?

A: Lower clamping voltage (18V or 11.5V versus 20V) means faster transient suppression and lower voltage peaks at the protected circuit. This is generally beneficial for circuit protection. Verify that the reduced clamping voltage does not conflict with minimum voltage requirements of protected components.