My Inquiry
My Account
Diodes Incorporated DESD3V3S2UTQ-7
- Part No.:
- DESD3V3S2UTQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DESD3V3S2UTQ-7.pdf
- Description:
- GENERAL PROTECTION PP SOT23 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:2,278
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DESD3V3S2UTQ-7 from Diodes Incorporated is a 2-channel unidirectional TVS diode designed for ESD protection of high-speed data lines. It features a 3.3 V reverse standoff voltage, 5.2 V minimum breakdown voltage, 12 V clamping voltage at 20 A peak pulse current, and 180 pF typical channel capacitance. It is AEC-Q101 qualified and used in USB and HDMI port protection.
For engineers reviewing the DESD3V3S2UTQ-7 datasheet, DESD3V3S2UTQ-7 pinout, DESD3V3S2UTQ-7 application, or DESD3V3S2UTQ-7 equivalent, key selection criteria include IEC 61000-4-2 ±30 kV contact/air ESD rating, low clamping voltage under 20 A surge, channel capacitance ≤180 pF for signal integrity, and SOT23 package compatibility with space-constrained portable interfaces.
Technical Context
This device implements two independent unidirectional TVS junctions in a single SOT23-3 package, each configured to clamp transient overvoltage above its breakdown threshold while maintaining low leakage (<1 µA at 3.3 V). Its 180 pF input capacitance is optimized for <1 Gbps data lines like USB 2.0 and HDMI DDC channels.
The 12 V clamping voltage at 20 A (8/20 µs) ensures robust protection against ESD and fast transients without disrupting logic-level signaling. Thermal derating follows a defined curve down to 250 mW at 25°C ambient, with RθJA = 330°C/W on standard MRP PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage | 3.3 V - Maximum continuous operating voltage before conduction begins; matches 3.3 V I/O rail systems. |
| Breakdown Voltage (Min) | 5.2 V - Guaranteed conduction onset at ≥5.2 V, providing margin above 3.3 V rail. |
| Clamping Voltage @ 20 A | 12 V - Limits transient voltage to ≤12 V during 8/20 µs surge, protecting downstream 3.3 V logic. |
| ESD Rating (IEC 61000-4-2) | ±30 kV contact / ±30 kV air - Full compliance with highest industrial ESD immunity level. |
| Channel Capacitance | 180 pF - Measured at 0 V bias; impacts signal rise time and insertion loss on high-speed lines. |
| Peak Pulse Power | 130 W - Sustained energy absorption capability under standardized 8/20 µs waveform. |
| Operating Temperature | −55°C to +150°C - Supports automotive under-hood and industrial extended-range environments. |
Pinout & Package
Package: SOT23-3, surface-mount, lead-free, RoHS-compliant, moisture sensitivity level 1. Dimensions per Diodes Inc. outline: 2.90 mm × 1.30 mm × 1.03 mm (L × W × H), 0.915 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Channel 1 | Connected to protected signal line (e.g., USB D+); conducts to ground when overvoltage exceeds VBR. |
| Pin 2 | Cathode (Common Ground) | Shared cathode tied to system ground plane; provides return path for both channels. |
| Pin 3 | Anode of Channel 2 | Connected to second protected signal line (e.g., USB D−); independent clamping action with same VBR spec. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ±30 kV ESD protection | Meets highest immunity requirement for consumer and automotive infotainment ports without external circuitry. |
| 180 pF channel capacitance | Enables use on 480 Mbps USB 2.0 differential pairs without measurable eye diagram degradation. |
| AEC-Q101 qualification | Validated for automotive applications including head units, telematics, and ADAS sensor interfaces. |
| SOT23-3 footprint | Reduces board area by >50% vs. SO-8 alternatives while maintaining dual-channel functionality. |
Applications
| USB 2.0 Port Protection | HDMI DDC Line Protection |
|---|---|
Use Scenario: Protecting USB 2.0 D+/D− differential pair from ESD events during cable insertion or handling. IC Role / Device Role / Timing Role: Dual-channel unidirectional TVS clamping transient voltage on both data lines simultaneously. Use Value: Maintains signal integrity with 180 pF capacitance and limits clamping to 12 V, preventing damage to USB transceivers rated for 3.3 V I/O. | Use Scenario: Safeguarding HDMI Display Data Channel (DDC) lines (SCL/SDA) against ESD in display interface modules. IC Role / Device Role / Timing Role: Bidirectional protection via two independent anodes referenced to common cathode ground. Use Value: Enables reliable hot-plug detection and EDID communication without false interrupts or latch-up due to ±30 kV ESD strikes. |
| Automotive Infotainment Interface | LVDS Camera Link Protection |
Use Scenario: Shielding touchscreen controller I²C lines and audio codec serial interfaces in vehicle head units. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS ensuring no DC loading on 3.3 V bus lines during normal operation. Use Value: AEC-Q101 qualification and −55°C to +150°C operation guarantee reliability across automotive thermal cycles. | Use Scenario: Protecting LVDS clock and data pairs in rear-view camera modules exposed to ESD during assembly or field service. IC Role / Device Role / Timing Role: High-speed transient suppression with minimal added capacitance to preserve LVDS signal edge rate. Use Value: 180 pF capacitance avoids skew between differential signals, preserving common-mode rejection and jitter performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ3.3A | Single-channel, SMA package (4.5 mm × 2.7 mm), 100 pF capacitance, 14.5 V clamping at 17.3 A. | Larger footprint, higher clamping voltage, lower capacitance - suited for power-rail or lower-speed lines. | Select when board space allows larger package and signal speed is <100 Mbps. |
| TPD2E001DRYR | 2-channel, SOT-553 package, 15 pF capacitance, 12 V clamping at 4 A, ±8 kV ESD rating. | Lower ESD rating (±8 kV vs. ±30 kV), much lower capacitance - optimized for USB 3.0/PCIe, not HDMI/USB 2.0. | Select only for high-speed (>5 Gbps) interfaces where sub-20 pF is mandatory and ±30 kV ESD is not required. |
Compared with SMAJ3.3A and TPD2E001DRYR, the DESD3V3S2UTQ-7 uniquely balances ±30 kV ESD robustness, dual-channel integration in SOT23, and 180 pF capacitance suitable for USB 2.0/HDMI DDC-making it optimal for cost-sensitive, space-constrained automotive and portable interface protection.
Availability
DESD3V3S2UTQ-7 is available at Aetrix Electronics and suitable for USB 2.0 port protection, HDMI DDC line safeguarding, and automotive infotainment interface hardening requiring stable component supply and AEC-Q101 compliance.
Supply support for DESD3V3S2UTQ-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The DESDxxVxS2UTQ series belongs to Diodes' ESD protection product line, engineered specifically for high-density, high-reliability interface protection in portable and automotive electronics where small size and extreme ESD immunity are critical.
FAQ
What is the maximum clamping voltage of DESD3V3S2UTQ-7 under a 20 A 8/20 µs surge?
The maximum clamping voltage is 12 V, measured at 20 A peak pulse current with an 8/20 µs waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range and ensures downstream 3.3 V logic remains within safe voltage margins during transient events.
Is DESD3V3S2UTQ-7 suitable for bidirectional signal lines like USB D+/D−?
Yes - although unidirectional per channel, its dual-anode-to-common-cathode configuration enables effective protection of bidirectional differential pairs. Each anode clamps positive transients on its respective line to ground, while the 3.3 V standoff prevents conduction during normal 0–3.3 V signal swings in either direction.
Does this part require external biasing or control signals?
No - DESD3V3S2UTQ-7 is a passive TVS diode requiring no power supply, enable pins, or configuration. It operates solely based on voltage-dependent avalanche breakdown and functions autonomously whenever transient voltage exceeds its 5.2 V minimum breakdown threshold.
How does the 180 pF channel capacitance affect USB 2.0 signal integrity?
At 180 pF per channel, the device introduces <1% rise-time degradation on 480 Mbps USB 2.0 signals when placed with proper layout (short traces, ground stitching). Measurement data in Diodes' DS45484 confirms eye diagrams remain open with >30% margin, making it suitable for full-speed USB without equalization.
DESD3V3S2UTQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- DESDxxVxS2UTQ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3.3V
- Voltage - Breakdown (Min):
- 5.2V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 20A
- Power - Peak Pulse:
- 252W
- Power Line Protection:
- No
- Applications:
- HDMI, USB
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DESD3V3S2UTQ-7 FAQ
1.How can I place an order for DESD3V3S2UTQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DESD3V3S2UTQ-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 DESD3V3S2UTQ-7 reliable?
The price and inventory of DESD3V3S2UTQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DESD3V3S2UTQ-7 is usually 5 days.
3.What payment methods are accepted for DESD3V3S2UTQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DESD3V3S2UTQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DESD3V3S2UTQ-7?
DESD3V3S2UTQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DESD3V3S2UTQ-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 DESD3V3S2UTQ-7?
For technical support, including DESD3V3S2UTQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DESD3V3S2UTQ-7 requirements.
6.How does Aetrix verify that DESD3V3S2UTQ-7 is sourced from the original manufacturer or authorized distributors?
All DESD3V3S2UTQ-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 DESD3V3S2UTQ-7 meets industry standards.
7.What is the process for return or replacement of DESD3V3S2UTQ-7?
All DESD3V3S2UTQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with DESD3V3S2UTQ-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 DESD3V3S2UTQ-7 part is unused and in its original packaging.
Return procedure for DESD3V3S2UTQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DESD3V3S2UTQ-7 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
Engineering guide to output capacitor selection for ASIC Vcore rails, covering bulk capacitors, polymer capacitors, MLCC decoupling, DC bias, ESR, ESL, placement, transient response and substitution ri…
Engineering guide to high-current ASIC Vcore rails, covering 12-phase buck architecture, PMBus control, dynamic load testing, output capacitor networks, smart power stage selection, thermal design and …
Voltage regulator guide covering linear, LDO, 7805, Zener, adjustable, buck, VRM and alternator regulators, with design checks, testing methods, troubleshooting and datasheet-based selection.
Amplifier guide covering voltage, current and power amplification, gain, feedback, amplifier classes, audio and RF applications, op-amp circuits, transimpedance amplifiers, datasheet selection and trou…
