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Nexperia USA Inc. PTVS28VS1UR-QX
- Part No.:
- PTVS28VS1UR-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
PTVS28VS1UR-QX.pdf
- Description:
- PTVS28VS1UR-Q/SOD123W/SOD2
- Quantity:
- Payment:
- Shipping:
Inventory:8,518
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Product details
Overview
PTVS28VS1UR-Q from Nexperia is a unidirectional 400 W Transient Voltage Suppressor (TVS) diode in SOD123W (CFP3) package, designed for automotive-grade overvoltage protection at 28 V nominal system voltage. It features 28 V reverse standoff voltage (VRWM), 34.4 V clamping voltage (VCL) at 45.4 A peak pulse current (IPPM), and <0.1 µA reverse leakage at VRWM - deployed in engine control units and infotainment power rails.
For engineers reviewing the PTVS28VS1UR-Q datasheet, PTVS28VS1UR-Q pinout, PTVS28VS1UR-Q application, or PTVS28VS1UR-Q equivalent, key selection criteria include AEC-Q101 qualification, 1 mm profile for space-constrained PCB layouts, IEC 61643-321 (10/1000 µs) compliance, and cathode-anode polarity marking for correct orientation in 12 V/24 V automotive supply paths.
Technical Context
This unidirectional TVS operates as a clamping device: under normal bias it presents high impedance (>1 GΩ) below VRWM = 28 V, then rapidly transitions to low-impedance conduction when transient voltage exceeds VBR = 31.1–34.4 V. Its junction-to-solder-point thermal resistance is 18 K/W, enabling effective heat dissipation during 400 W (10/1000 µs) pulses without derating in standard FR4 layouts.
The device uses planar silicon junction technology with optimized doping and metallization to achieve <0.001 µA IRM at VRWM and withstand 30 kV ESD (IEC 61000-4-2 contact discharge). Its SOD123W footprint supports automated reflow with 0.1 mm stencil thickness and 2.1 mm × 1.4 mm solder land dimensions per manufacturer-recommended layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 28 V - Maximum continuous reverse operating voltage before clamping begins; matches 24 V automotive nominal systems with 16.7% tolerance margin. |
| VBR (min) | 31.1 V - Minimum breakdown voltage at 1 mA test current; ensures reliable turn-on above normal transients like load dump spikes. |
| VCL @ IPPM | 34.4 V - Clamped voltage at 45.4 A peak pulse; limits downstream IC stress to safe levels during ISO 7637-2 Pulse 5a events. |
| PPPM | 400 W - Peak pulse power rating per IEC 61643-321 (10/1000 µs); sustains 45.4 A surge without degradation. |
| IRM | 0.1 µA - Reverse leakage at VRWM; negligible power loss in always-on 28 V supply monitoring circuits. |
| ESD Rating | 30 kV contact / 30 kV air - Full IEC 61000-4-2 compliance; eliminates need for external ESD protection on protected lines. |
| AEC-Q101 | Qualified - Validated for automotive use per stress test requirements including HTGB, HTRB, and temperature cycling. |
Pinout & Package
SOD123W (CFP3) surface-mount plastic package: 2.6 mm × 1.7 mm × 1.0 mm body, 1 mm max height, flat lead profile optimized for automated placement and reflow. Cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to protected line (e.g., 24 V rail); polarity-sensitive - reverse connection disables clamping function. |
| 2 (A) | Anode | Connected to ground reference; forms low-impedance path to shunt transients during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 certified - validated for under-hood temperature range (−55 °C to +150 °C junction) and mechanical shock/vibration. |
| Ultra-low profile | 1.0 mm max height - enables placement beneath connectors or in tight stacking zones on multi-layer automotive PCBs. |
| High ESD robustness | 30 kV contact discharge - protects CAN/LIN bus interfaces and sensor inputs without additional TVS stages. |
| Low thermal resistance | 18 K/W junction-to-solder-point - maintains clamping performance across 100+ surge cycles without thermal runaway. |
| Stable leakage | ≤0.1 µA IRM at VRWM - avoids false triggering in low-power wake-up circuits and battery-monitoring ICs. |
Applications
| Engine Control Unit (ECU) Power Input | Infotainment System USB Port |
|---|---|
Use Scenario: Protection against ISO 7637-2 load dump transients (up to 60 V, 400 ms) on 24 V supply input to ECU microcontroller and CAN transceivers. IC Role / Device Role: Primary clamping TVS placed directly at connector entry point, upstream of DC-DC converter input. Use Value: Limits voltage to ≤34.4 V during 45.4 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V logic supplies. |
Use Scenario: Guarding USB VBUS line in head unit against hot-plug ESD and cable-induced surges in vehicle cabin environments. IC Role / Device Role: Unidirectional TVS between VBUS and chassis ground, leveraging low capacitance (<100 pF typical) to avoid signal integrity impact. Use Value: Withstands 30 kV contact ESD without degradation while adding <0.5 Ω dynamic resistance during clamping - no data corruption on USB 2.0 lines. |
| Body Control Module (BCM) LIN Bus | ADAS Camera Power Rail |
Use Scenario: LIN physical layer protection against battery reversal, jump-start spikes, and electromagnetic coupling from adjacent high-current wiring. IC Role / Device Role: Low-leakage TVS on LIN transceiver VCC pin, selected for <0.1 µA IRM to preserve sleep-mode current budget. Use Value: Maintains <1 µA total module standby current while clamping 12 V LIN transients to <35 V - ensuring transceiver functional safety compliance. |
Use Scenario: Shielding 12 V camera module power input from ignition noise and alternator ripple in rear-view or surround-view systems. IC Role / Device Role: First-line transient suppressor before buck converter, sized for 400 W pulse handling to survive repeated start-stop cycles. Use Value: Enables >100,000-cycle reliability in stop-start applications by dissipating 400 W surges without parameter shift or solder joint fatigue. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A-Q | Lower PPPM (400 W same), but higher VCL = 45.7 V at 38.9 A; SMA package (2.5 mm height). | Less effective clamping margin for 24 V systems requiring sub-36 V protection ceiling. | Prefer PTVS28VS1UR-Q where board height <1.1 mm is mandatory and tighter VCL is critical. |
| TPSMD28 | Same VRWM/VCL specs, but non-AEC-Q101; DO-214AB package (4.5 mm height, larger footprint). | Not qualified for automotive under-hood deployment; unsuitable for ECU/BCM mounting locations. | Select PTVS28VS1UR-Q for production automotive programs requiring full AEC-Q101 traceability and SMT scalability. |
Compared with SMAJ28A-Q and TPSMD28, PTVS28VS1UR-Q delivers superior height-constrained performance (1 mm vs. 2.5/4.5 mm), lower clamping voltage (34.4 V vs. 45.7 V), and full automotive qualification - making it optimal for next-gen compact ADAS and domain controller designs.
Availability
PTVS28VS1UR-Q is available at Aetrix Electronics and suitable for automotive ECU power protection, infotainment USB port hardening, and ADAS camera module surge suppression requiring stable component supply across multi-year vehicle production cycles.
Supply support for PTVS28VS1UR-Q 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 automotive-qualified components and advanced packaging.
The PTVSxS1UR-Q series targets automotive power rail protection, delivering AEC-Q101-compliant TVS diodes in ultra-low-profile SOD123W packages for space- and reliability-critical E/E architectures.
FAQ
What is the maximum clamping voltage for PTVS28VS1UR-Q under standard test conditions?
The clamping voltage (VCL) is 34.4 V at 45.4 A peak pulse current (IPPM), measured per IEC 61643-321 using a 10/1000 µs waveform. This value is guaranteed maximum across temperature range −55 °C to +125 °C and represents worst-case voltage seen by downstream circuitry during surge events.
Does PTVS28VS1UR-Q support bidirectional transient suppression?
No - PTVS28VS1UR-Q is strictly unidirectional. It conducts only when cathode voltage exceeds anode voltage by ≥31.1 V. For bidirectional protection (e.g., AC lines or differential buses), a separate symmetric TVS or dual-diode configuration is required.
How does the SOD123W package affect thermal performance compared to SMA or SMB?
The SOD123W's 18 K/W junction-to-solder-point thermal resistance is 3× better than SMA (≈55 K/W) due to its low-profile copper clip construction and direct cathode tab thermal path. This allows sustained 400 W pulse handling without heatsinking on standard 1-oz FR4 boards.
Is PTVS28VS1UR-Q compatible with lead-free reflow profiles?
Yes - it is qualified for JEDEC J-STD-020D-compliant lead-free reflow, with peak temperature up to 260 °C for 30 seconds. The recommended solder paste stencil thickness is 0.1 mm, and footprint dimensions match Nexperia's published CFP3 reflow land pattern (2.1 mm × 1.4 mm pads).
PTVS28VS1UR-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Package/Case:
- SOD-123W
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28V (Max)
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 8.8A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
PTVS28VS1UR-QX FAQ
1.How can I place an order for PTVS28VS1UR-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for PTVS28VS1UR-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 PTVS28VS1UR-QX reliable?
The price and inventory of PTVS28VS1UR-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PTVS28VS1UR-QX is usually 5 days.
3.What payment methods are accepted for PTVS28VS1UR-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PTVS28VS1UR-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PTVS28VS1UR-QX?
PTVS28VS1UR-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PTVS28VS1UR-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 PTVS28VS1UR-QX?
For technical support, including PTVS28VS1UR-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PTVS28VS1UR-QX requirements.
6.How does Aetrix verify that PTVS28VS1UR-QX is sourced from the original manufacturer or authorized distributors?
All PTVS28VS1UR-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 PTVS28VS1UR-QX meets industry standards.
7.What is the process for return or replacement of PTVS28VS1UR-QX?
All PTVS28VS1UR-QX units undergo pre-shipment inspection (PSI). If there is an issue with PTVS28VS1UR-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 PTVS28VS1UR-QX part is unused and in its original packaging.
Return procedure for PTVS28VS1UR-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PTVS28VS1UR-QX Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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