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Nexperia USA Inc. PESD12VS1UB-QX
- Part No.:
- PESD12VS1UB-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- TVS Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
PESD12VS1UB-QX.pdf
- Description:
- PESD12VS1UB-Q/SOD523/SC-79
- Quantity:
- Payment:
- Shipping:
Inventory:2,463
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Product details
Overview
PESD12VS1UB-QX from Nexperia is a unidirectional ESD protection diode in SOD523 (SC-79) package, designed to protect a single data or signal line against IEC 61000-4-2 ESD (±30 kV contact), IEC 61000-4-5 surge (5 A, 8/20 µs), and transients. It features 12 V reverse standoff voltage, 38 pF typical capacitance at 1 MHz, and clamps to 35 V at 5 A peak pulse current - ideal for CAN bus and high-speed data line protection in automotive ECUs.
For engineers reviewing the PESD12VS1UB-QX datasheet, PESD12VS1UB-QX pinout, PESD12VS1UB-QX application, or PESD12VS1UB-QX equivalent, key selection criteria include clamping voltage under 5 A surge, sub-75 pF capacitance for signal integrity, AEC-Q101 qualification for automotive deployment, and unidirectional polarity alignment with ground-referenced lines.
Technical Context
This device operates as a transient voltage suppression (TVS) diode with avalanche breakdown at 14.7–15.3 V and low differential resistance (≤200 Ω), enabling fast response to ESD events (<1 ns rise time per IEC 61000-4-2). Its unidirectional architecture supports only positive-polarity or negative-polarity signal lines relative to ground - not bidirectional or AC-coupled paths.
Clamping performance is validated at 35 V under 5 A (8/20 µs), with peak pulse power rated at 180 W. Thermal derating follows a defined curve: PPP drops to ~60% of rated value at 125 °C junction temperature, supporting operation up to 150 °C ambient per AEC-Q101 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage (VRWM) | 12 V - maximum continuous DC or RMS voltage the line can carry without diode conduction. |
| Clamping Voltage (VCL) | 35 V at IPPM = 5 A - peak voltage seen by protected circuit during worst-case surge, limiting IC stress. |
| Diode Capacitance (Cd) | 38 pF (typ), ≤75 pF (max) at 1 MHz - ensures minimal signal distortion on USB, CAN, or audio lines. |
| ESD Withstand (IEC 61000-4-2) | ±30 kV contact discharge - exceeds automotive OEM requirements for connector-level ESD immunity. |
| Surge Rating (IEC 61000-4-5) | 5 A, 8/20 µs waveform - handles lightning-induced surges in vehicle body control modules. |
| Breakdown Voltage (VBR) | 15.0 V (typ) at IR = 5 mA - defines precise turn-on threshold for reliable overvoltage triggering. |
| Junction Temperature (Tj) | 150 °C max - enables placement near heat sources in engine bay or infotainment units. |
Pinout & Package
Package: SOD523 (SC-79), surface-mount plastic package measuring 1.2 mm × 0.8 mm × 0.6 mm; cathode marked by bar on end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to protected line; conducts when line voltage exceeds VRWM + VBR relative to ground. |
| 2 (A) | Anode | Connected to system ground; completes current path during ESD event to shunt energy away from IC. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional ESD protection | Optimized for ground-referenced signal lines (e.g., CAN_H, LIN, UART TX), avoiding false triggering on AC signals. |
| Low clamping voltage | 35 V at 5 A ensures downstream transceivers (e.g., TJA1042, SN65HVD230) remain within absolute maximum ratings. |
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, HBM ESD, and mechanical shock - no requalification needed for Tier 1 designs. |
| Low leakage current | ≤50 nA at 12 V enables use on battery-backed lines (e.g., RTC, wake-up inputs) without measurable drain. |
| Small footprint | SOD523 saves PCB area vs. SOT23 or SOIC packages - critical for compact ADAS sensor modules and gateway ECUs. |
Applications
| Automotive CAN Bus Protection | USB 2.0 Interface Protection |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L lines in body control modules exposed to ESD during service port connection. IC Role / Device Role: Unidirectional TVS diode placed at connector entry point to clamp transients before reaching CAN transceiver. Use Value: Maintains CAN signal integrity with ≤38 pF loading while surviving ±30 kV contact ESD per ISO 10605. |
Use Scenario: Shielding USB D+ and D− lines in infotainment head units from user-hand ESD events. IC Role / Device Role: Line-specific protection element mounted adjacent to USB receptacle to minimize trace inductance. Use Value: Prevents latch-up or damage in USB PHY ICs (e.g., USB3300) without degrading 480 Mbps eye diagram margin. |
| Industrial RS-485 Transceiver Protection | Audio Line Input Protection |
Use Scenario: Safeguarding RS-485 driver/receiver pairs in factory automation gateways connected to long cable runs. IC Role / Device Role: Per-line unidirectional clamp on A/B differential pair, referenced to local ground plane. Use Value: Withstands 5 A surge (IEC 61000-4-5) without degradation, preserving common-mode range and fail-safe biasing. |
Use Scenario: Protecting analog audio input jacks (e.g., 3.5 mm TRS) in automotive amplifiers from handling ESD. IC Role / Device Role: Ground-referenced clamp on tip/ring conductors to suppress ±8 kV air discharge per IEC 61000-4-2. Use Value: Sub-75 pF capacitance avoids high-frequency roll-off in 20 Hz–20 kHz audio band; <1 nA leakage preserves DC bias. |
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 capacitance (100 pF typ), lower ESD rating (±15 kV), same SOD-523 package. | Not AEC-Q101 qualified; suitable for consumer-grade USB but not automotive CAN. | Select when cost is prioritized over automotive compliance and signal bandwidth. |
| Vishay VEML6030X01 | Photodiode, not an ESD protector - invalid alternative; excluded from valid comparison. | N/A - misidentified part; not functionally equivalent. | Discard; verify part number and function before substitution. |
Compared with NUP4105MR6T1G, PESD12VS1UB-QX delivers 2× higher ESD immunity and 2.6× lower capacitance - critical for CAN FD and high-speed serial links - while maintaining identical board footprint and solder profile.
Availability
PESD12VS1UB-QX is available at Aetrix Electronics and suitable for automotive ECU design, industrial communication interface development, and consumer electronics surge protection requiring stable component supply across multi-year production cycles.
Supply support for PESD12VS1UB-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 transient suppression in harsh environments such as vehicle powertrain, chassis, and infotainment systems.
FAQ
Is PESD12VS1UB-QX bidirectional or unidirectional?
PESD12VS1UB-QX is strictly unidirectional: it protects only one polarity - either positive-going transients (anode grounded) or negative-going (cathode grounded). It does not suppress symmetrical ESD on AC-coupled or differential lines without external biasing, unlike bidirectional TVS diodes such as PESD5V0S1BA.
What is the meaning of the marking code 'N3' on the device?
The top-side marking 'N3' is the manufacturer-specific identifier for PESD12VS1UB-QX per Nexperia's marking standard. It is not a date code or lot identifier - it uniquely distinguishes this part from other SOD523 diodes (e.g., 'N2' marks PESD5V0S1UB-QX) and must be verified optically during incoming inspection.
Can PESD12VS1UB-QX protect both CAN_H and CAN_L simultaneously?
No - each PESD12VS1UB-QX protects only one line. A full CAN bus requires two devices: one on CAN_H (anode to ground) and one on CAN_L (anode to ground), both configured with cathodes toward their respective lines. Using a single device on a differential pair leaves one line unprotected.
Does this device require a series resistor for optimal ESD performance?
No series resistor is required or recommended. The diode's low dynamic impedance (<200 Ω) and fast response (<1 ns) enable direct placement at the connector. Adding series resistance increases clamping voltage and delays response - contradicting IEC 61000-4-2 layout guidelines that mandate minimal trace length between connector and protection device.
PESD12VS1UB-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):
- 12V (Max)
- Voltage - Breakdown (Min):
- 14.7V
- Voltage - Clamping (Max) @ Ipp:
- 35V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 180W
- Power Line Protection:
- No
- Applications:
- CAN, Telecom
- Capacitance @ Frequency:
- 38pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
PESD12VS1UB-QX FAQ
1.How can I place an order for PESD12VS1UB-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for PESD12VS1UB-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 PESD12VS1UB-QX reliable?
The price and inventory of PESD12VS1UB-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PESD12VS1UB-QX is usually 5 days.
3.What payment methods are accepted for PESD12VS1UB-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PESD12VS1UB-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PESD12VS1UB-QX?
PESD12VS1UB-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PESD12VS1UB-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 PESD12VS1UB-QX?
For technical support, including PESD12VS1UB-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PESD12VS1UB-QX requirements.
6.How does Aetrix verify that PESD12VS1UB-QX is sourced from the original manufacturer or authorized distributors?
All PESD12VS1UB-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 PESD12VS1UB-QX meets industry standards.
7.What is the process for return or replacement of PESD12VS1UB-QX?
All PESD12VS1UB-QX units undergo pre-shipment inspection (PSI). If there is an issue with PESD12VS1UB-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 PESD12VS1UB-QX part is unused and in its original packaging.
Return procedure for PESD12VS1UB-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PESD12VS1UB-QX Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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