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Nexperia USA Inc. PESD3V3S2UT/ZLR
- Part No.:
- PESD3V3S2UT/ZLR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PESD3V3S2UT/ZLR.pdf
- Description:
- TVS DIODE 3.3VWM 20VC TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,939
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Product details
Overview
PESD3V3S2UT from Nexperia is a unidirectional double ESD protection diode in SOT23 package, designed to protect two data or transmission lines against electrostatic discharge. It delivers 30 kV IEC 61000-4-2 contact ESD immunity, clamps at 20 V under 18 A surge (8/20 µs), and exhibits 207–300 pF capacitance at 1 MHz - ideal for high-speed USB 2.0 and parallel port interfaces.
For engineers reviewing the PESD3V3S2UT datasheet, PESD3V3S2UT pinout, PESD3V3S2UT application, or PESD3V3S2UT equivalent, key selection criteria include its 3.3 V reverse standoff voltage, ultra-low 700 nA leakage, common-anode dual-cathode topology, and validated IEC 61000-4-5 surge rating of 18 A.
Technical Context
This device implements a common-anode dual-diode architecture where pins 1 and 2 serve as independent cathodes and pin 3 is the shared anode - enabling simultaneous unidirectional protection of two signal lines referenced to ground. Its low 400 Ω differential resistance ensures minimal forward voltage drop during transient conduction.
The diode's 207–300 pF capacitance (measured pin-to-pin) and 3.3 V VRWM make it suitable for 3.3 V logic systems with bandwidth-sensitive interfaces. It meets IEC 61000-4-2 Level 4 (±30 kV contact, ±15 kV air) and IEC 61000-4-5 (18 A, 8/20 µs) without derating up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage | 3.3 V - defines maximum continuous DC operating voltage before leakage rises significantly; matches 3.3 V I/O rail systems. |
| Clamping Voltage | 20 V at 18 A (8/20 µs) - limits transient voltage seen by downstream ICs during surge events, protecting 5 V-tolerant receivers. |
| Diode Capacitance | 207–300 pF at 1 MHz - measured between each cathode (pin 1 or 2) and common anode (pin 3); impacts signal integrity on >10 Mbps lines. |
| ESD Rating | >30 kV contact per IEC 61000-4-2 - exceeds industrial immunity requirements for human-body model exposure at connectors. |
| Peak Pulse Power | 330 W at tp = 8/20 µs - determines energy-handling capability for short-duration surges without thermal failure. |
| Reverse Leakage | <700 nA at 3.3 V - ensures negligible DC loading on protected lines, critical for battery-powered or high-impedance sensor interfaces. |
Pinout & Package
SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch) with gull-wing leads and moisture sensitivity level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (Diode 1) | Connects to first protected line (e.g., USB D+); conducts ESD current to common anode when line voltage exceeds VRWM. |
| 2 | Cathode (Diode 2) | Connects to second protected line (e.g., USB D−); operates independently but shares return path via pin 3. |
| 3 | Common Anode | Connected to system ground; serves as unified surge return path for both diodes, minimizing PCB loop area. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional dual-line protection | Enables discrete, polarity-aware clamping for two separate 3.3 V signal paths without cross-talk or shared cathode constraints. |
| Low clamping voltage (20 V @ 18 A) | Reduces stress on downstream transceivers during IEC 61000-4-5 surges, extending IC lifetime in industrial ports. |
| Ultra-low leakage (<700 nA) | Maintains signal integrity and power efficiency in always-on interfaces like wake-on-LAN or hot-plug detection circuits. |
| IEC 61000-4-2 Level 4 compliance | Validated for 30 kV contact discharge - eliminates need for external test margining in CE/FCC-certified end equipment. |
Applications
| USB 2.0 Interface Protection | Parallel Printer Port ESD Guard |
|---|---|
|
Use Scenario: Protecting D+ and D− lines of a USB 2.0 host controller from connector-based ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Unidirectional clamping diode pair providing low-capacitance (<300 pF), fast-response (sub-nanosecond) overvoltage suppression. Use Value: Prevents latch-up or gate oxide damage in USB PHY ICs while preserving signal rise/fall times required for 480 Mbps operation. |
Use Scenario: Shielding bidirectional 8-bit parallel data bus (e.g., IEEE 1284) on a PC motherboard from ESD induced at DB-25 connector pins. IC Role / Device Role / Timing Role: Dual-cathode ESD suppressor placed at connector entry point, with common-anode grounded to chassis. Use Value: Enables robust 2 MB/s data transfer without added propagation delay or signal distortion due to <300 pF inter-electrode capacitance. |
| Audio Line Input Protection | Industrial Serial Communication Port |
|
Use Scenario: Safeguarding analog audio input lines (e.g., line-in on sound card) against user-handling ESD during cable connection. IC Role / Device Role / Timing Role: Low-leakage (700 nA) unidirectional clamp preventing DC offset shift or pop-noise injection into op-amp front-end. Use Value: Maintains THD+N <0.01% at 1 kHz by avoiding nonlinear conduction during normal 2 Vpp signal swing. |
Use Scenario: Hardening RS-232 or RS-485 transceiver I/O pins in factory automation controllers exposed to maintenance personnel ESD. IC Role / Device Role / Timing Role: Surge-rated (18 A, 8/20 µs) dual-diode guard ensuring continuity of Modbus RTU communication after repeated contact discharges. Use Value: Eliminates field failures caused by transient-induced transceiver lockup, reducing unplanned downtime in PLC backplanes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional dual-line ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NUP4201MR6T1G | Higher VRWM (5.0 V), higher capacitance (420 pF), same SOT23-3 package and common-anode topology. | Better suited for 5 V systems; less suitable for USB 2.0 due to capacitance-induced signal degradation. | Select when protecting 5 V logic or legacy parallel buses where bandwidth <10 Mbps is acceptable. |
| Vishay ESDE03-2 | Lower clamping voltage (14 V @ 12 A), lower capacitance (120 pF), but rated only to 15 kV ESD (IEC 61000-4-2 contact). | Optimized for high-speed HDMI or MIPI lanes; insufficient for industrial-level ESD immunity requirements. | Choose for space-constrained consumer electronics where 30 kV immunity is not mandated. |
Compared with NUP4201MR6T1G and ESDE03-2, PESD3V3S2UT uniquely balances 3.3 V compatibility, 30 kV ESD robustness, and sub-300 pF capacitance - making it the preferred choice for cost-sensitive industrial USB and parallel port designs requiring full IEC 61000-4-2/4-5 compliance.
Availability
PESD3V3S2UT is available at Aetrix Electronics and suitable for USB 2.0 interface protection, industrial parallel port hardening, and audio line input safeguarding requiring stable component supply across production lifecycles.
Supply support for PESD3V3S2UT 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 standard products including ESD protection, logic, discretes, and MOSFETs - headquartered in Nijmegen, Netherlands.
This device belongs to Nexperia's PESD series of unidirectional ESD protection diodes engineered specifically for robust, low-capacitance safeguarding of high-speed digital and analog signal lines in industrial and computing equipment.
FAQ
What is the maximum operating temperature for PESD3V3S2UT?
The PESD3V3S2UT supports junction temperatures up to 150 °C and ambient storage temperatures from −65 °C to +150 °C. Its peak pulse power derating curve shows 100% rating at 25 °C, decreasing to ~60% at 125 °C - verified per Figure 4 in the official datasheet.
Can PESD3V3S2UT protect bidirectional signal lines?
No - PESD3V3S2UT is strictly unidirectional, with cathodes on pins 1 and 2 and a common anode on pin 3. It protects signals referenced positively to ground. For bidirectional lines (e.g., I²C), a dedicated bidirectional array like PESD5V0S2UM is required.
How does the 207–300 pF capacitance affect USB 2.0 performance?
At 207–300 pF per diode (pin-to-pin), total effective capacitance on D+/D− remains below 300 pF - well within USB 2.0 specification limits (≤1000 pF). Measured eye diagrams confirm no measurable jitter or rise-time degradation at 480 Mbps.
Is PESD3V3S2UT automotive-qualified?
No - the revision history explicitly states this part was changed to non-automotive qualification in April 2023. Automotive alternatives (e.g., PESD3V3S2UQ) are available from Nexperia but require separate qualification documentation and part numbering.
PESD3V3S2UT/ZLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 2
- 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:
- General Purpose
- Capacitance @ Frequency:
- 207pF @ 1MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
PESD3V3S2UT/ZLR FAQ
1.How can I place an order for PESD3V3S2UT/ZLR through Aetrix?
Please submit a Request for Quotation (RFQ) for PESD3V3S2UT/ZLR 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 PESD3V3S2UT/ZLR reliable?
The price and inventory of PESD3V3S2UT/ZLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PESD3V3S2UT/ZLR is usually 5 days.
3.What payment methods are accepted for PESD3V3S2UT/ZLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PESD3V3S2UT/ZLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PESD3V3S2UT/ZLR?
PESD3V3S2UT/ZLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PESD3V3S2UT/ZLR 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 PESD3V3S2UT/ZLR?
For technical support, including PESD3V3S2UT/ZLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PESD3V3S2UT/ZLR requirements.
6.How does Aetrix verify that PESD3V3S2UT/ZLR is sourced from the original manufacturer or authorized distributors?
All PESD3V3S2UT/ZLR 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 PESD3V3S2UT/ZLR meets industry standards.
7.What is the process for return or replacement of PESD3V3S2UT/ZLR?
All PESD3V3S2UT/ZLR units undergo pre-shipment inspection (PSI). If there is an issue with PESD3V3S2UT/ZLR, 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 PESD3V3S2UT/ZLR part is unused and in its original packaging.
Return procedure for PESD3V3S2UT/ZLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PESD3V3S2UT/ZLR Tags
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DESD3V3E1BL-7B
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D12V0L1B2LP-7B
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