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Nexperia USA Inc. PESD12VS1UAF
- Part No.:
- PESD12VS1UAF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
PESD12VS1UAF.pdf
- Description:
- TVS DIODE 12VWM 19VC SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:732
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Product details
Overview
PESD12VS1UAF from Nexperia is a unidirectional ESD protection diode in SOD323 package, designed to safeguard single signal lines against IEC 61000-4-2 ESD (±30 kV contact) and IEC 61000-4-5 surge (22.5 A, 8/20 µs). It features 12 V reverse standoff voltage, 27 V clamping voltage at 22.5 A, and 160–180 pF capacitance - optimized for high-speed USB, HDMI, and audio interfaces in portable electronics.
For engineers reviewing the PESD12VS1UAF datasheet, PESD12VS1UAF pinout, PESD12VS1UAF application, or PESD12VS1UAF equivalent, key selection criteria include unidirectional polarity handling, low clamping voltage under surge, sub-1 nA leakage at 12 V, and compatibility with space-constrained layouts requiring <1.7 mm × 1.25 mm footprint.
Technical Context
This device operates as a unidirectional TVS diode, conducting only when the anode-to-cathode voltage exceeds the 13.3–15.75 V breakdown threshold, enabling robust transient suppression on positively referenced signal paths. Its low differential resistance (5–100 Ω) ensures rapid voltage clamping during ESD events.
Thermal design relies on junction-to-solder-point thermal resistance of 250 K/W (standard FR4 pad) and 90 K/W (enhanced cathode pad), supporting reliable power dissipation up to 600 W peak pulse (8/20 µs) without thermal runaway. Capacitance remains stable (160–180 pF at 0 V) across operating bias, preserving signal integrity in 100 Mbps+ data lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage | 12 V - maximum continuous working voltage before conduction begins; defines safe operating range for protected line. |
| Clamping Voltage | 27 V at 22.5 A (8/20 µs) - peak voltage seen by downstream IC during worst-case surge; limits stress on connected transceivers. |
| ESD Rating | ±30 kV contact discharge (IEC 61000-4-2 Level 4) - withstands direct human-body ESD strikes without degradation. |
| Diode Capacitance | 160–180 pF at 1 MHz, 0 V - low enough for USB 2.0 (480 Mbps) and analog audio, minimizing signal distortion. |
| Leakage Current | 1 nA max at 12 V, 25 °C - negligible loading on high-impedance sensor or reference lines. |
| Peak Pulse Power | 600 W (8/20 µs) - energy-handling capability sufficient for industrial-level surge immunity per IEC 61000-4-5. |
Pinout & Package
Supplied in ultra-compact SOD323 surface-mount package (1.7 mm × 1.25 mm × 0.95 mm), with cathode identified by a marking band. Optimized for automated placement and reflow soldering on dense PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K1) | Cathode | Connected to ground or low-impedance return path; carries surge current during clamping; marking band identifies this terminal. |
| 2 (A) | Anode | Connected to protected signal line; forward-biased during positive transients; defines unidirectional protection direction. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional ESD Protection | Enables precise protection on DC-biased or positive-only signal lines (e.g., USB D+, HDMI TMDS+) without false triggering. |
| Low Clamping Voltage (27 V @ 22.5 A) | Reduces voltage overshoot into sensitive I/O pins, improving system-level surge immunity beyond basic ESD compliance. |
| Sub-1 nA Reverse Leakage | Maintains signal fidelity on high-Z analog inputs (e.g., microphone bias, sensor references) with no measurable DC error. |
| 160–180 pF Capacitance | Preserves edge rate and eye diagram integrity in 480 Mbps USB 2.0 and 1.65 Gbps HDMI 1.4a applications. |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
|
Use Scenario: Protecting D+ and D− lines of USB 2.0 ports in smartphones and docking stations against repeated ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed directly at connector, clamping transients before they reach USB transceiver IC. Use Value: Maintains 480 Mbps data integrity while surviving >30 kV contact ESD per IEC 61000-4-2, reducing field failure rates in consumer handhelds. |
Use Scenario: Shielding TMDS clock and data channels in HDMI 1.4 receivers against electrostatic discharge during cable insertion. IC Role / Device Role / Timing Role: Low-capacitance ESD clamp on each differential pair, positioned adjacent to HDMI connector to minimize stub length. Use Value: 160–180 pF capacitance avoids signal rise-time degradation, ensuring compliance with HDMI 1.4a eye mask requirements at 1.65 Gbps. |
| Portable Audio Jack Protection | Industrial Sensor Interface Protection |
|
Use Scenario: Guarding 3.5 mm audio jack tip/ring contacts in Bluetooth headsets and smart speakers from user-hand ESD. IC Role / Device Role / Timing Role: Single-line unidirectional protector on biased microphone or line-in path, referenced to system ground. Use Value: 1 nA leakage prevents DC offset in electret microphone bias networks; 27 V clamping protects op-amp input stages. |
Use Scenario: Securing 4–20 mA current-loop or RS-485 bus lines in factory-floor PLC I/O modules exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary front-end surge suppressor on field-side signal entry, coordinated with gas discharge tube (GDT) for staged protection. Use Value: 600 W peak power rating handles IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges; 22.5 A peak current supports coordination with upstream GDT. |
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 (30 pF per line, but dual-channel); lower clamping (18 V @ 12 A); bidirectional configuration. | Requires redesign for bidirectional use; better suited for low-capacitance, multi-line protection where polarity is undefined. | Select if protecting two independent lines simultaneously with tighter clamping, accepting bidirectional behavior and larger footprint. |
| Vishay ESDE05V65D04 | Lower standoff (5.5 V); higher ESD rating (±30 kV air); same SOD323 package; 120 pF capacitance. | Optimized for 3.3 V or 5 V logic rails; unsuitable for 12 V signal lines due to premature conduction. | Choose only for sub-6 V interfaces; not a drop-in replacement for 12 V systems like industrial analog sensors or legacy USB. |
Compared with NUP4105MR6T1G and ESDE05V65D04, PESD12VS1UAF uniquely balances 12 V standoff, 27 V clamping, and 160–180 pF capacitance - making it the only option validated for 12 V-tolerant, high-speed, unidirectional signal protection without compromising surge margin or layout density.
Availability
PESD12VS1UAF is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI signal line hardening, and industrial sensor interface protection requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for PESD12VS1UAF 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 delivering high-performance, reliable discrete, logic, and MOSFET devices, with leadership in ESD protection and automotive-grade components.
PESD12VS1UAF belongs to Nexperia's PESD series of unidirectional TVS diodes, engineered specifically for high-density, high-reliability ESD protection in portable and industrial electronics where board space and signal integrity are critical constraints.
FAQ
Is PESD12VS1UAF suitable for bidirectional signal lines like RS-232 or CAN?
No. PESD12VS1UAF is strictly unidirectional and conducts only when the anode is positive relative to the cathode. Bidirectional lines require symmetrical clamping, such as in the PESD5V0S1UAF or dedicated bidirectional TVS arrays. Using this part on a bidirectional line risks failure during negative transients.
What is the maximum recommended PCB trace length between PESD12VS1UAF and the protected connector?
Trace length should be ≤3 mm from diode cathode to ground plane and ≤5 mm from anode to connector pin. Longer traces increase inductance, degrading clamping response and allowing voltage overshoot above 27 V during fast ESD events - violating IEC 61000-4-2 immunity targets.
Does PESD12VS1UAF meet automotive qualification standards?
No. Per Nexperia's revision history (v.2, April 2023), PESD12VS1UAF is explicitly non-automotive qualified. It lacks AEC-Q200 stress testing and automotive-grade process controls. For automotive applications, Nexperia offers the -Q qualified PESD12VS1UA-Q variant with extended temperature and reliability validation.
How does thermal resistance affect derating of peak pulse power at elevated ambient temperatures?
At 85 °C ambient, peak pulse power must be reduced to ~420 W (70% of 600 W) due to junction temperature limits. This follows the typical curve in Figure 4: relative PPP drops linearly from 100% at 25 °C to ~65% at 125 °C, based on Rth(j-a) = 345 K/W and Tj(max) = 150 °C.
PESD12VS1UAF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Package/Case:
- SC-76, SOD-323
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19V
- Current - Peak Pulse (10/1000µs):
- 22.5A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 160pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
PESD12VS1UAF FAQ
1.How can I place an order for PESD12VS1UAF through Aetrix?
Please submit a Request for Quotation (RFQ) for PESD12VS1UAF 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 PESD12VS1UAF reliable?
The price and inventory of PESD12VS1UAF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PESD12VS1UAF is usually 5 days.
3.What payment methods are accepted for PESD12VS1UAF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PESD12VS1UAF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PESD12VS1UAF?
PESD12VS1UAF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PESD12VS1UAF 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 PESD12VS1UAF?
For technical support, including PESD12VS1UAF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PESD12VS1UAF requirements.
6.How does Aetrix verify that PESD12VS1UAF is sourced from the original manufacturer or authorized distributors?
All PESD12VS1UAF 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 PESD12VS1UAF meets industry standards.
7.What is the process for return or replacement of PESD12VS1UAF?
All PESD12VS1UAF units undergo pre-shipment inspection (PSI). If there is an issue with PESD12VS1UAF, 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 PESD12VS1UAF part is unused and in its original packaging.
Return procedure for PESD12VS1UAF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PESD12VS1UAF Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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