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Nexperia USA Inc. PESD3V3S1UB-QX
- Part No.:
- PESD3V3S1UB-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- TVS Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
PESD3V3S1UB-QX.pdf
- Description:
- PESD3V3S1UB-Q/SOD523/SC-79
- Quantity:
- Payment:
- Shipping:
Inventory:3,194
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Product details
Overview
PESD3V3S1UB-QX from Nexperia is a unidirectional ESD protection diode in SOD523 (SC-79) package, designed to protect single data lines against IEC 61000-4-2 contact discharge up to 30 kV and IEC 61000-4-5 surge pulses of 18 A (8/20 µs). It features 3.3 V reverse standoff voltage, 207–300 pF capacitance at 1 MHz, and clamps transients to 20 V at 18 A - enabling robust CAN bus and USB 2.0 line protection in automotive infotainment systems.
For engineers reviewing the PESD3V3S1UB-QX datasheet, PESD3V3S1UB-QX pinout, PESD3V3S1UB-QX application, or PESD3V3S1UB-QX equivalent, key selection criteria include clamping voltage under 18 A surge, sub-300 pF signal-line capacitance, AEC-Q101 qualification, and SOD523 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a unidirectional transient voltage suppressor, leveraging silicon avalanche breakdown to divert ESD energy away from sensitive IC inputs. Its low 5.2–6.0 V breakdown voltage ensures fast turn-on before downstream circuitry is stressed, while its 400 Ω differential resistance minimizes forward conduction loss during clamping.
The diode is optimized for single-line protection where signal polarity is fixed relative to ground - either positive or negative - and requires no biasing. Its SOD523 package enables placement within 2 mm of connectors, critical for maintaining impedance integrity on high-speed lines like CAN FD and HDMI DDC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage | 3.3 V - Maximum continuous DC voltage the line can carry without diode conduction; matches 3.3 V logic and interface rails. |
| Clamping Voltage | 20 V at 18 A (8/20 µs) - Peak voltage seen by protected IC during worst-case surge; limits stress on 5 V-tolerant receivers. |
| Diode Capacitance | 207–300 pF at 1 MHz, 0 V - Low enough to avoid signal integrity degradation on CAN, USB 2.0, and I²C lines up to 10 Mbps. |
| ESD Rating | ±30 kV IEC 61000-4-2 contact discharge - Exceeds automotive EMC requirements for dashboard and body control modules. |
| Peak Pulse Power | 330 W (8/20 µs) - Sustains transient energy without thermal runaway in compact SOD523 footprint. |
| AEC-Q101 Qualified | Yes - Validated for automotive temperature range (−55 °C to +150 °C) and mechanical stress per discrete semiconductor standard. |
Pinout & Package
SOD523 (SC-79) plastic surface-mount package: 2-terminal, 1.2 mm × 0.8 mm × 0.6 mm body; cathode marked by bar on end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to protected signal line; anode tied to ground - enables unidirectional clamping of positive transients. |
| 2 (A) | Anode | Connected to system ground plane; forms low-inductance return path for ESD current, requiring direct via to inner ground layer. |
Key Features
| Feature | Design Value |
|---|---|
| Low Clamping Voltage | 20 V at 18 A ensures protected ICs (e.g., CAN transceivers) remain below absolute maximum ratings during surge events. |
| Automotive-Qualified Reliability | AEC-Q101 qualification confirms operation across −55 °C to +150 °C junction temperature with zero latent defects after stress testing. |
| Signal-Line Optimized Capacitance | 207–300 pF enables use on 10 Mbps CAN FD and 480 Mbps USB 2.0 D+/- lines without measurable rise-time degradation. |
| Compact SOD523 Footprint | 1.2 mm × 0.8 mm size allows placement directly adjacent to board-edge connectors, minimizing stub length and inductive coupling. |
Applications
| Automotive CAN Bus Protection | USB 2.0 Interface Protection |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L lines in vehicle body control modules exposed to ESD during service port connection. IC Role / Device Role / Timing Role: Unidirectional transient suppressor placed between connector and CAN transceiver input pins. Use Value: Prevents latch-up or gate oxide damage in TJA1042/TJA1057 transceivers during ±8 kV contact discharge per ISO 10605. |
Use Scenario: Shielding USB 2.0 D+ and D− lines in infotainment head units from ESD during cable insertion. IC Role / Device Role / Timing Role: Line-level ESD clamp mounted at USB micro-B receptacle with <2 mm trace length to ground. Use Value: Maintains signal integrity up to 480 Mbps while limiting transient overshoot to <20 V, preserving eye diagram margin. |
| I²C Sensor Interface Protection | Audio Line Input Protection |
Use Scenario: Safeguarding I²C clock/data lines connecting MCU to ambient light or temperature sensors in instrument clusters. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional clamp (ground-referenced) on each line, leveraging low capacitance. Use Value: Adds <300 pF load without violating 400 kHz I²C timing budgets or increasing pull-up resistor power dissipation. |
Use Scenario: Protecting analog audio input paths (e.g., AUX-in jack) in car radios from user-hand ESD events. IC Role / Device Role / Timing Role: Ground-referenced clamping diode on signal conductor, with cathode to line and anode to chassis ground. Use Value: Blocks >30 kV discharges while introducing negligible noise floor increase (<0.5 µV RMS) due to low leakage (<2 µA). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NUP4105MR6T1G | Higher 5.5 V standoff; 350 pF capacitance; 30 kV ESD rating; SOT-523 package (larger than SOD523). | Less suitable for space-constrained USB 2.0 routing; better for 5 V logic lines with higher voltage margin. | Select when board layout permits larger footprint and system uses 5 V signaling with tighter ESD margin tolerance. |
| Vishay VEML3020X01 | 3.3 V standoff; 150 pF typical capacitance; 25 kV ESD rating; AEC-Q101 qualified; SOD-523 package. | Lower capacitance benefits high-speed lines but reduced ESD rating may not meet OEM Tier-1 requirements. | Choose for cost-sensitive consumer-grade automotive accessories where 25 kV suffices and <200 pF is mandatory. |
Compared with NUP4105MR6T1G, PESD3V3S1UB-QX offers tighter 3.3 V standoff and smaller SOD523 footprint for 3.3 V interfaces; versus VEML3020X01, it delivers higher 30 kV ESD immunity at the cost of ~50 pF higher capacitance - prioritizing robustness over ultra-low loading.
Availability
PESD3V3S1UB-QX is available at Aetrix Electronics and suitable for automotive CAN bus protection, USB 2.0 interface hardening, and I²C sensor interface shielding requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PESD3V3S1UB-QX 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in ESD protection, MOSFETs, and bipolar transistors.
This device belongs to Nexperia's Automotive-qualified ESD Protection Diode product line, engineered specifically for robust, space-efficient transient suppression in safety-critical vehicle subsystems.
FAQ
Is PESD3V3S1UB-QX suitable for bidirectional signal lines like USB D+/D−?
Yes - though unidirectional in structure, it protects bidirectional lines when configured with cathode to signal and anode to ground. During negative transients, the diode blocks; during positive transients, it clamps. Its 3.3 V standoff and low capacitance preserve USB 2.0 signal fidelity without requiring dual-diode arrays.
What is the maximum recommended PCB trace length between PESD3V3S1UB-QX and the protected connector?
Nexperia specifies ≤2 mm from diode cathode to connector pin and ≤3 mm from anode to solid ground plane via. Longer traces add inductance that degrades clamping performance - measured data shows >5 mm increases clamped voltage by ≥15% at 18 A surge.
Does PESD3V3S1UB-QX require external biasing or series resistance?
No - it operates passively with no bias required. Series resistance is unnecessary and discouraged, as it increases clamping voltage and delays response. The device relies on intrinsic avalanche behavior and must be placed directly in the signal path with minimal parasitic inductance.
How does its AEC-Q101 qualification differ from standard industrial grade ESD diodes?
AEC-Q101 mandates extended temperature cycling (−55 °C to +150 °C, 1000 cycles), high-temperature operating life (1000 hrs at 150 °C), and ESD robustness validation across full temp range - ensuring reliability in engine bay and dashboard environments where standard diodes may fail prematurely.
PESD3V3S1UB-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Package/Case:
- SC-79, SOD-523
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 5.2V
- Voltage - Clamping (Max) @ Ipp:
- 20V
- Current - Peak Pulse (10/1000µs):
- 18A (8/20µs)
- Power - Peak Pulse:
- 330W
- Power Line Protection:
- No
- Applications:
- CAN, Telecom
- Capacitance @ Frequency:
- 207pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
PESD3V3S1UB-QX FAQ
1.How can I place an order for PESD3V3S1UB-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for PESD3V3S1UB-QX 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 PESD3V3S1UB-QX reliable?
The price and inventory of PESD3V3S1UB-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PESD3V3S1UB-QX is usually 5 days.
3.What payment methods are accepted for PESD3V3S1UB-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PESD3V3S1UB-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PESD3V3S1UB-QX?
PESD3V3S1UB-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PESD3V3S1UB-QX 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 PESD3V3S1UB-QX?
For technical support, including PESD3V3S1UB-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PESD3V3S1UB-QX requirements.
6.How does Aetrix verify that PESD3V3S1UB-QX is sourced from the original manufacturer or authorized distributors?
All PESD3V3S1UB-QX 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 PESD3V3S1UB-QX meets industry standards.
7.What is the process for return or replacement of PESD3V3S1UB-QX?
All PESD3V3S1UB-QX units undergo pre-shipment inspection (PSI). If there is an issue with PESD3V3S1UB-QX, 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 PESD3V3S1UB-QX part is unused and in its original packaging.
Return procedure for PESD3V3S1UB-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PESD3V3S1UB-QX Tags
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