CDDFN2-T3.3LC Equivalent & Substitute Parts

Part Overview

The CDDFN2-T3.3LC is a 3V Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose ESD and transient protection in surface-mount applications. This bidirectional Zener diode features an 8V maximum clamping voltage and 5A peak pulse current rating in a compact 2-DFN (1x0.6mm) package. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

CDDFN2-T3.3LC

Bourns Inc.In Stock: 19680CDDFN2-T3.3LC Datasheet

Current PartRFQ

CDDFN2-T3.3B

Bourns Inc.In Stock: 53322CDDFN2-T3.3B Datasheet

DirectRFQ

DESD3V3S1BL-7B

Diodes IncorporatedIn Stock: 585459DESD3V3S1BL-7B Datasheet

SimilarRFQ

ESD207B102ELE6327XTMA1

Infineon TechnologiesIn Stock: 54753ESD207B102ELE6327XTMA1 Datasheet

SimilarRFQ

ESD208B102ELE6327XTMA1

Infineon TechnologiesIn Stock: 3151ESD208B102ELE6327XTMA1 Datasheet

SimilarRFQ

ESDAVLC8-1BT2Y

STMicroelectronicsIn Stock: 11699ESDAVLC8-1BT2Y Datasheet

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ESDAXLC6-1BT2

STMicroelectronicsIn Stock: 293243ESDAXLC6-1BT2 Datasheet

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PESD3V3X1BL,315

Nexperia USA Inc.In Stock: 57337PESD3V3X1BL,315 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDDFN2-T3.3LC is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Reverse Standoff Voltage: 3V to 3.3V (Max)
• Breakdown Voltage (Min): 3.65V to 4V
• Clamping Voltage (Max) @ Ipp: 7V to 8.1V
• Peak Pulse Current: 4A to 8A (8/20µs)
• Bidirectional Zener type

Mechanical Compatibility Criteria:

• Surface-mount package with footprint compatibility
• Operating temperature range overlap: minimum -40°C to 125°C
• RoHS3 compliance
• MSL rating of 1 (Unlimited)

Substitute parts are grouped into two categories: direct replacements (same electrical performance and package family) and functional equivalents (compatible electrical performance with alternative package geometries).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CDDFN2-T3.3B

The CDDFN2-T3.3B is the direct replacement for the obsolete CDDFN2-T3.3LC. Both parts are manufactured by Bourns Inc. and share identical electrical specifications (3.3V reverse standoff, 8V clamping, 5A peak pulse current) and package geometry (2-DFN 1x0.6mm). The CDDFN2-T3.3B is in active production status with significantly higher inventory availability (53,300 pcs vs. 19,585 pcs). This part is the preferred choice for new designs and production continuity.

Secondary Substitutes: DESD3V3S1BL-7B and PESD3V3X1BL,315

Both parts meet the core electrical requirements (3.3V reverse standoff, 5A peak pulse current) and are in active production. DESD3V3S1BL-7B (Diodes Inc.) offers extended temperature range (-65°C ~ 150°C) and higher inventory (585,400 pcs). PESD3V3X1BL,315 (Nexperia) includes AEC-Q101 automotive qualification and extended temperature range (-55°C ~ 150°C). Both use alternative package geometries (0402/DFN1006-2 and SOD-882 respectively) requiring PCB layout modification.

Alternative Consideration: ESD207B102ELE6327XTMA1

The Infineon ESD207B102ELE6327XTMA1 provides higher peak pulse current (8A vs. 5A) and is electrically compatible. However, this part carries "Not For New Designs" status, limiting its suitability for ongoing production. Use only when existing inventory constraints require it.

Not Recommended: ESDAVLC8-1BT2Y and ESD208B102ELE6327XTMA1

ESDAVLC8-1BT2Y lacks specified breakdown and clamping voltage parameters, creating uncertainty in circuit protection performance. ESD208B102ELE6327XTMA1 has reduced peak pulse current (4A vs. 5A) and "Not For New Designs" status.

Frequently Asked Questions (FAQ)

Q: Can I use CDDFN2-T3.3B as a direct drop-in replacement for CDDFN2-T3.3LC?

A: Yes. Both parts share identical electrical specifications and the same 2-DFN (1x0.6mm) package footprint. No PCB layout changes are required. The CDDFN2-T3.3B is the recommended replacement.

Q: What is the difference between the 2-UFDFN and 2-XDFN package designations?

A: Both designations refer to the same 2-DFN (1x0.6mm) package geometry. The letter suffix indicates minor manufacturing variations. Footprint compatibility is maintained between these variants.

Q: Why do some substitute parts have missing clamping voltage or peak pulse current specifications?

A: Incomplete parameter data in manufacturer datasheets limits the ability to fully characterize these parts. Parts with missing critical specifications should be avoided unless verified through direct manufacturer consultation.

Q: Can I use DESD3V3S1BL-7B or PESD3V3X1BL,315 if my PCB is already designed for the 2-DFN package?

A: No. DESD3V3S1BL-7B uses a 0402 (1006 Metric) package, and PESD3V3X1BL,315 uses SOD-882 package. Both require PCB layout redesign. Use these only if your design can accommodate the alternative package geometry.

Q: What is the significance of the AEC-Q101 qualification on PESD3V3X1BL,315?

A: AEC-Q101 qualification indicates the part meets automotive-grade reliability standards. This certification is relevant only for automotive applications. For general-purpose industrial use, it provides no functional advantage.

Q: Is the operating temperature range difference between -55°C ~ 85°C (CDDFN2-T3.3B) and -55°C ~ 125°C (CDDFN2-T3.3LC) significant?

A: The CDDFN2-T3.3B has a reduced upper temperature limit (85°C vs. 125°C). Verify that your application's maximum ambient and junction temperatures remain within the -55°C ~ 85°C range. If sustained operation above 85°C is required, select an alternative substitute with extended temperature rating.

Q: Why is inventory quantity listed for obsolete parts?

A: The CDDFN2-T3.3LC shows 19,585 pcs in stock as legacy inventory. This represents remaining stock from previous production runs. New designs must transition to active-status alternatives.