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Diodes Incorporated DESD34VS2SO-7
- Part No.:
- DESD34VS2SO-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DESD34VS2SO-7.pdf
- Description:
- TVS DIODE 34VWM 57VC SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:81,727
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Product details
Overview
DESD34VS2SO-7 from Diodes Incorporated is a dual-channel TVS diode designed for ESD protection of CAN and LIN bus transceivers. It features 34 V reverse standoff voltage, ±30 kV IEC 61000-4-2 contact/air discharge rating, 7 A peak pulse current (8/20 µs), 43 V clamping voltage at 1 A, and 100 pF junction capacitance - enabling robust transient suppression in automotive network interfaces.
For engineers reviewing the DESD34VS2SO-7 datasheet, DESD34VS2SO-7 pinout, DESD34VS2SO-7 application, or DESD34VS2SO-7 equivalent, key selection criteria include CAN/LIN bus voltage margin, low-capacitance signal integrity preservation, AEC-Q101 qualification, and SOT23 footprint compatibility with space-constrained PCB layouts.
Technical Context
This bidirectional ESD protection device uses silicon avalanche diode architecture to clamp transients above 36 V breakdown while maintaining sub-5 µA leakage at 34 V. Its dual-channel configuration protects both CAN_H and CAN_L lines independently within a single SOT23-3 package.
The 100 pF capacitance at 0 V and 1 MHz ensures minimal signal distortion on high-speed CAN FD (up to 5 Mbps) and LIN (20 kbps) buses, while the 350 W peak power dissipation (8/20 µs) handles repetitive surge events without degradation under AEC-Q101 stress conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage | 34 V - Maximum continuous operating voltage before clamping begins on CAN/LIN data lines |
| Breakdown Voltage | 36 V min at 1 mA - Ensures reliable triggering above system nominal voltage |
| Clamping Voltage (1 A) | 43 V max - Limits voltage seen by transceiver during ESD event to safe level |
| Peak Pulse Current | 7 A (8/20 µs) - Withstands IEC 61000-4-5 surge waveforms in automotive environments |
| Junction Capacitance | 100 pF at 0 V, 1 MHz - Preserves signal integrity on 5 Mbps CAN FD and 20 kbps LIN buses |
| ESD Rating | ±30 kV air & contact per IEC 61000-4-2 - Meets automotive OEM ESD immunity requirements |
| Leakage Current | 5 µA max at 34 V - Minimizes standby power loss in always-on vehicle networks |
Pinout & Package
Package: SOT23-3, surface-mount, lead-free, RoHS-compliant plastic case with matte tin-plated terminals. Dimensions: 2.9 mm × 1.35 mm × 1.0 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | CAN_H / LIN Line 1 Anode | Input terminal for first protected data line; connects to transceiver TX/RX node |
| Pin 2 | Common Cathode | Shared cathode connection for bidirectional clamping of both channels |
| Pin 3 | CAN_L / LIN Line 2 Anode | Input terminal for second protected data line; enables dual-line protection in one footprint |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel ESD protection | Single SOT23-3 package protects both CAN_H and CAN_L (or LIN bus pair), reducing BOM count and PCB area |
| AEC-Q101 qualified | Validated for automotive temperature range (−65 °C to +150 °C) and mechanical stress, supporting PPAP compliance |
| Low 100 pF capacitance | Enables use on 5 Mbps CAN FD networks without signal rise-time degradation or bit error increase |
| 350 W peak power dissipation | Sustains repeated 8/20 µs surges up to 7 A without parametric shift, meeting ISO 7637-3 pulse 5a requirements |
| Halogen- and antimony-free "Green" construction | Meets automotive environmental standards (Br+Cl <1500 ppm, Sb <1000 ppm) for end-of-life recycling |
Applications
| Automotive CAN Bus Interface | Industrial LIN Control Network |
|---|---|
Use Scenario: Protection of high-speed CAN FD transceivers (e.g., TJA1044, SN65HVD256) in engine control units and ADAS domain controllers. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between connector and transceiver I/O pins. Use Value: Maintains 5 Mbps signal fidelity while clamping ESD spikes to ≤43 V, preventing transceiver latch-up or permanent damage. | Use Scenario: ESD hardening of LIN slave nodes (e.g., MC33664, TLE7259) in body electronics modules like door locks and seat controls. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on LIN bus line, co-located with transceiver input. Use Value: Enables reliable 20 kbps communication under ±30 kV contact discharge, eliminating field failures due to assembly-line ESD. |
| Automotive Gateway Module | Heavy-Duty Vehicle J1939 Network |
Use Scenario: Dual-line protection in multi-protocol gateways connecting CAN FD, LIN, and FlexRay subsystems. IC Role / Device Role / Timing Role: First-stage ESD guard before common-mode choke and transceiver, minimizing PCB routing inductance. Use Value: Reduces board-level filtering complexity by providing integrated dual-line clamping with matched channel characteristics. | Use Scenario: Robust protection of J1939 physical layer (250 kbps) in commercial truck ECUs exposed to harsh shop-floor ESD and load dump coupling. IC Role / Device Role / Timing Role: Transient suppressor mounted directly at Deutsch DT connector interface. Use Value: Survives repeated ±30 kV discharges while maintaining <5 µA leakage at 24 V system voltage, ensuring long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel automotive ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF33A (ON Semiconductor) | Single-channel, 33 V VRWM, 12 A IPP, 130 pF CT | Requires two devices for dual-line protection; higher capacitance limits CAN FD use | Preferable only when higher surge rating outweighs layout cost and speed constraints |
| TPD2E001DRYR (Texas Instruments) | Two-channel, 5 V VRWM, 4 A IPP, 12 pF CT | Optimized for low-voltage USB/I²C; insufficient VBR margin for 12/24 V CAN/LIN | Not suitable for automotive bus protection due to 36 V min VBR requirement mismatch |
Compared with SMF33A and TPD2E001DRYR, DESD34VS2SO-7 uniquely balances 34 V standoff, dual-channel integration, 100 pF capacitance, and AEC-Q101 qualification - making it the only drop-in solution for space-constrained, high-reliability CAN/LIN ESD protection without compromising speed or voltage margin.
Availability
DESD34VS2SO-7 is available at Aetrix Electronics and suitable for automotive CAN FD interfaces, industrial LIN control networks, and heavy-duty vehicle J1939 systems requiring stable component supply across extended production lifecycles.
Supply support for DESD34VS2SO-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
This device belongs to Diodes' AEC-Q101-qualified TVS diode product line, engineered specifically for ESD-hardened automotive serial bus interfaces including CAN, LIN, and SENT.
FAQ
What is the maximum operating temperature for DESD34VS2SO-7 in automotive applications?
The device is rated for −65 °C to +150 °C junction temperature and qualified per AEC-Q101. At 150 °C ambient, derating reduces peak pulse power to ~120 mW (per Figure 1), but clamping performance remains effective for ESD events due to short transient duration.
Can DESD34VS2SO-7 be used on 5 Mbps CAN FD networks without signal integrity issues?
Yes - its 100 pF junction capacitance at 0 V and 1 MHz introduces negligible loading on CAN FD differential pairs. Measured rise/fall times remain within ISO 11898-2 specification limits when placed within 5 mm of the transceiver I/O pins.
How does the common cathode configuration affect circuit layout?
The shared cathode (Pin 2) simplifies PCB routing by eliminating separate ground return paths for each channel. It requires direct connection to a low-inductance chassis or power ground plane to ensure symmetrical clamping and avoid ground bounce during simultaneous transients.
Is DESD34VS2SO-7 compatible with lead-free reflow profiles?
Yes - it is fully RoHS-compliant with matte tin finish and qualified for standard JEDEC J-STD-020 Level 1 moisture sensitivity. The device withstands peak reflow temperatures up to 260 °C for 30 seconds without parametric shift or delamination.
DESD34VS2SO-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 34V (Max)
- Voltage - Breakdown (Min):
- 36V
- Voltage - Clamping (Max) @ Ipp:
- 57V
- Current - Peak Pulse (10/1000µs):
- 7A (8/20µs)
- Power - Peak Pulse:
- 350W
- Power Line Protection:
- No
- Applications:
- CAN
- Capacitance @ Frequency:
- 100pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DESD34VS2SO-7 FAQ
1.How can I place an order for DESD34VS2SO-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DESD34VS2SO-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DESD34VS2SO-7 reliable?
The price and inventory of DESD34VS2SO-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DESD34VS2SO-7 is usually 5 days.
3.What payment methods are accepted for DESD34VS2SO-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DESD34VS2SO-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DESD34VS2SO-7?
DESD34VS2SO-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DESD34VS2SO-7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DESD34VS2SO-7?
For technical support, including DESD34VS2SO-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DESD34VS2SO-7 requirements.
6.How does Aetrix verify that DESD34VS2SO-7 is sourced from the original manufacturer or authorized distributors?
All DESD34VS2SO-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DESD34VS2SO-7 meets industry standards.
7.What is the process for return or replacement of DESD34VS2SO-7?
All DESD34VS2SO-7 units undergo pre-shipment inspection (PSI). If there is an issue with DESD34VS2SO-7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DESD34VS2SO-7 part is unused and in its original packaging.
Return procedure for DESD34VS2SO-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DESD34VS2SO-7 Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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