CDDFN2-T24C TVS Diode Equivalent & Substitute Parts

Part Overview

The CDDFN2-T24C is a 24V Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 47V maximum clamping voltage and 1A peak pulse current rating in a compact 2-DFN (1x0.6mm) package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

CDDFN2-T24C

Bourns Inc.In Stock: 15730CDDFN2-T24C Datasheet

Current PartRFQ

D24V0L1B2LP-7B

Diodes IncorporatedIn Stock: 310447D24V0L1B2LP-7B Datasheet

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D24V0L1B2LPS-7B

Diodes IncorporatedIn Stock: 8183D24V0L1B2LPS-7B Datasheet

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ESDAVLC8-1BT2Y

STMicroelectronicsIn Stock: 11699ESDAVLC8-1BT2Y Datasheet

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PESD24VF1BLYL

Nexperia USA Inc.In Stock: 212457PESD24VF1BLYL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDDFN2-T24C is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff: 24V nominal
• Voltage - Clamping (Max) @ Ipp: 46V–47V range
• Current - Peak Pulse (8/20µs): 1A–2A range
• Bidirectional Channels: 1
• Type: Zener
• Mounting Type: Surface Mount
• RoHS3 Compliance

Package Compatibility Consideration: The original 2-UFDFN (1x0.6mm) package is functionally replaced by equivalent DFN packages (DFN1006-2, SOD-882) that maintain the same electrical performance and surface-mount footprint compatibility within standard PCB design tolerances.

The substitute parts listed below meet these criteria and are classified as active products with current manufacturing availability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

D24V0L1B2LP-7B and D24V0L1B2LPS-7B (Diodes Incorporated) are the preferred substitutes. Both parts maintain the 24V reverse standoff voltage and 46V clamping voltage within acceptable tolerance of the original specification. These devices offer enhanced current handling (2A vs. 1A) and extended operating temperature range (-65°C to 150°C), providing improved thermal margin. Both are active products with AEC-Q101 automotive qualification and ROHS3 compliance. The primary distinction between these two part numbers is packaging format: LP-7B is standard Tape & Reel, while LPS-7B is also Tape & Reel with identical electrical specifications.

Secondary Substitute (Conditional Use):

PESD24VF1BLYL (Nexperia USA Inc.) meets the 24V reverse standoff requirement and maintains 1A peak pulse current matching the original specification. However, the 17V clamping voltage is significantly lower than the original 47V specification. This part is suitable only for applications where lower clamping voltage is acceptable or beneficial. The device features exceptionally low capacitance (0.3pF @ 1MHz) and is AEC-Q101 qualified with extended temperature range (-55°C to 150°C).

Compliance and Availability:

All substitute parts are active products with current manufacturing inventory, ROHS3 compliance, MSL 1 rating, and AEC-Q101 automotive qualification. Selection should be based on specific application requirements regarding clamping voltage tolerance and thermal operating range.

Frequently Asked Questions (FAQ)

Q: Can D24V0L1B2LP-7B directly replace CDDFN2-T24C without PCB modification?

A: Yes. Both parts are surface-mount devices with compatible DFN package footprints. The D24V0L1B2LP-7B operates within the same 24V reverse standoff voltage class and maintains clamping voltage within acceptable tolerance (46V vs. 47V). No PCB layout changes are required.

Q: What is the difference between D24V0L1B2LP-7B and D24V0L1B2LPS-7B?

A: Both parts are electrically identical with matching specifications. The difference is in packaging format designation. Both are supplied in Tape & Reel format with identical electrical performance and are interchangeable for circuit design purposes.

Q: Why does PESD24VF1BLYL have a lower clamping voltage (17V) than the original part (47V)?

A: PESD24VF1BLYL is a different TVS diode variant within the 24V reverse standoff class. The lower clamping voltage reflects a different internal design optimized for different protection requirements. This part is suitable only for applications where lower clamping voltage is specified or required.

Q: Are all substitute parts automotive-qualified?

A: Yes. All three substitute parts carry AEC-Q101 automotive qualification and are suitable for automotive and industrial applications requiring this certification level.

Q: What is the operating temperature advantage of the substitute parts?

A: The original CDDFN2-T24C operates from -40°C to 125°C. The Diodes Incorporated substitutes extend this to -65°C to 150°C, and the Nexperia part to -55°C to 150°C. This provides improved thermal margin for high-temperature applications.

Q: Can I use PESD24VF1BLYL as a direct replacement?

A: PESD24VF1BLYL is electrically compatible for the 24V reverse standoff voltage class but has significantly different clamping characteristics (17V vs. 47V). Use this part only if your application circuit design accommodates the lower clamping voltage specification.

Q: Are all parts RoHS3 compliant?

A: Yes. All substitute parts and the original CDDFN2-T24C are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.