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Nexperia USA Inc. PTVS18VS1UTR-QX
- Part No.:
- PTVS18VS1UTR-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
PTVS18VS1UTR-QX.pdf
- Description:
- PTVS18VS1UTR-Q/SOD123W/SOD2
- Quantity:
- Payment:
- Shipping:
Inventory:5,332
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Product details
Overview
PTVS18VS1UTR-QX from Nexperia is a unidirectional 400 W Transient Voltage Suppressor (TVS) in SOD123W (CFP3) package, designed for high-temperature transient overvoltage protection in automotive power rails. It features 18 V reverse standoff voltage (VRWM), 29.2 V clamping voltage (VCL) at 5 mA, 13.7 A peak pulse current (IPPM), and junction temperature rating up to 185 °C.
For engineers reviewing the PTVS18VS1UTR-QX datasheet, PTVS18VS1UTR-QX pinout, PTVS18VS1UTR-QX application, or PTVS18VS1UTR-QX equivalent, this device is selected for robust ESD/EMI surge suppression in 12 V–24 V automotive subsystems where thermal stability and AEC-Q101 compliance are mandatory.
Technical Context
This TVS diode operates in avalanche breakdown mode with a typical breakdown voltage (VBR) of 20.0–22.1 V at 10 mA. Its unidirectional configuration provides forward conduction only during negative transients relative to cathode, enabling precise polarity-aware clamping on DC power lines.
It delivers stable clamping performance across −55 °C to +185 °C ambient, supported by low thermal resistance (Rth(j-sp) = 18 K/W) and high ESD immunity (30 kV contact discharge per IEC 61000-4-2), making it suitable for under-hood and battery-management applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 18 V - Maximum continuous reverse operating voltage before clamping begins; sets threshold for 12 V/24 V rail protection. |
| VCL @ IPPM | 29.2 V - Clamped voltage at 13.7 A peak pulse current; limits downstream IC stress during ISO 7637-2 Pulse 1/2a/5a events. |
| PPPM | 400 W - Peak pulse power handling per IEC 61643-321 (10/1000 µs); sustains high-energy surges without failure. |
| IRM | 0.001 µA - Reverse leakage at VRWM; ensures minimal standby power loss in always-on automotive modules. |
| Tj max | 185 °C - Maximum junction temperature; enables operation in engine bay or near power converters without derating. |
| AEC-Q101 | Qualified - Meets stress test requirements for discrete semiconductors in automotive applications; supports PPAP documentation. |
Pinout & Package
SOD123W (CFP3) surface-mount plastic package: 2.6 mm × 1.7 mm × 1.0 mm body height, flat lead profile optimized for automated placement and thermal dissipation via cathode solder pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to protected line (e.g., 12 V rail); marking bar identifies this terminal; carries full clamping current during transient. |
| 2 (A) | Anode | Connected to ground or lower-potential reference; completes avalanche path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature operation | Junction rated to 185 °C - Enables direct placement near power MOSFETs or DC-DC converters without thermal derating. |
| Low-profile packaging | 1.0 mm max height - Fits compact PCB layouts in space-constrained ADAS or infotainment modules. |
| Automotive qualification | AEC-Q101 compliant - Validated for vibration, temperature cycling, and humidity exposure per automotive reliability standards. |
| ESD robustness | 30 kV contact / 30 kV air discharge - Protects against human-body-model and system-level ESD events without external shielding. |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Infotainment USB Port |
|---|---|
Use Scenario: Protection of 12 V supply input against load dump and alternator ripple in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor; clamps transients within nanoseconds. Use Value: Limits voltage excursion to ≤29.2 V during 400 W surges, preventing damage to MCU power management ICs and CAN transceivers. | Use Scenario: Surge suppression on VBUS line of USB 2.0 ports in head units exposed to hot-plug and cable-induced transients. IC Role / Device Role / Timing Role: Standoff clamp on 5 V rail; activated only during >18 V overvoltage events while remaining invisible during normal operation. Use Value: Maintains <0.001 µA leakage to avoid USB enumeration issues, while surviving 30 kV ESD strikes per IEC 61000-4-2. |
| Electric Power Steering (EPS) Motor Driver | On-Board Charger (OBC) Auxiliary Supply |
Use Scenario: Input protection for H-bridge gate drivers subjected to inductive kickback and battery reversal transients. IC Role / Device Role / Timing Role: Cathode tied to motor supply rail; anode grounded; responds in <1 ns to suppress spikes above 18 V. Use Value: Withstands repeated 13.7 A pulses without parameter shift, ensuring long-term reliability in safety-critical steering systems. | Use Scenario: 24 V auxiliary rail protection in bidirectional OBCs exposed to grid surges and regenerative braking energy feedback. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converter; coordinates with MOVs for multi-stage protection. Use Value: 400 W peak power rating handles combined surge energy from AC line transients and DC bus oscillations without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A-Q | Lower PPPM (400 W same), but higher VCL (32.4 V) and larger SMA package (2.4 mm height). | Less suitable for ultra-low-profile automotive modules due to 2.4× taller footprint. | Select when board height >1.2 mm is acceptable and legacy SMA footprint reuse is required. |
| TPSMD18A | Same VRWM and VCL, but rated only to 175 °C junction and not AEC-Q101 qualified. | Not approved for automotive production; limited to industrial or consumer-grade designs. | Select only for non-automotive applications where cost is prioritized over qualification and extended temperature range. |
Compared with SMAJ18A-Q and TPSMD18A, PTVS18VS1UTR-QX uniquely combines AEC-Q101 qualification, 185 °C operation, and 1.0 mm profile-enabling first-tier automotive deployment where space, reliability, and thermal margin are simultaneously constrained.
Availability
PTVS18VS1UTR-QX is available at Aetrix Electronics and suitable for automotive power supply protection, electric power steering systems, and on-board charger auxiliary rails requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PTVS18VS1UTR-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 leading global semiconductor manufacturer headquartered in Nijmegen, Netherlands, specializing in high-performance, high-reliability discrete and logic devices for automotive, industrial, and computing markets.
The PTVSxS1UTR-Q series was developed specifically for AEC-Q101-compliant transient suppression in high-temperature automotive power domains, emphasizing low-profile packaging, stable clamping, and extended junction temperature capability.
FAQ
What is the maximum clamping voltage of PTVS18VS1UTR-QX at its rated peak pulse current?
The clamping voltage (VCL) is 29.2 V at 13.7 A peak pulse current (IPPM), measured per IEC 61643-321 (10/1000 µs waveform). This value ensures downstream components see no more than 29.2 V during worst-case surge events, preserving functional safety margins in 12 V–24 V systems.
Does PTVS18VS1UTR-QX support bidirectional transient suppression?
No - PTVS18VS1UTR-QX is a unidirectional TVS diode. It clamps only when the cathode is positive relative to the anode. For bidirectional protection (e.g., data lines), two devices in series opposition or a dedicated bidirectional TVS like PTVS18VS1UTR-Q would be required.
How does the 185 °C junction rating impact PCB layout and thermal design?
The 185 °C rating allows uninterrupted operation even when mounted adjacent to heat-generating components like power MOSFETs or inlets near engine compartments. Layout should maximize copper area on the cathode pad (≥1 cm² on FR4) to achieve Rth(j-sp) = 18 K/W and maintain safe junction temperatures under sustained 400 W pulses.
Is the SOD123W package compatible with standard reflow soldering profiles?
Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020 moisture sensitivity level 1 and standard lead-free reflow profiles. Recommended stencil thickness is 0.1 mm, with solder land dimensions of 1.2 mm × 1.4 mm per pad, as defined in the official CFP3 footprint (sod123w_fr).
PTVS18VS1UTR-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Package/Case:
- SOD-123W
- Series:
- PTVSxS1UTR
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18V (Max)
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 13.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 185°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
PTVS18VS1UTR-QX FAQ
1.How can I place an order for PTVS18VS1UTR-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for PTVS18VS1UTR-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 PTVS18VS1UTR-QX reliable?
The price and inventory of PTVS18VS1UTR-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PTVS18VS1UTR-QX is usually 5 days.
3.What payment methods are accepted for PTVS18VS1UTR-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PTVS18VS1UTR-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PTVS18VS1UTR-QX?
PTVS18VS1UTR-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PTVS18VS1UTR-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 PTVS18VS1UTR-QX?
For technical support, including PTVS18VS1UTR-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PTVS18VS1UTR-QX requirements.
6.How does Aetrix verify that PTVS18VS1UTR-QX is sourced from the original manufacturer or authorized distributors?
All PTVS18VS1UTR-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 PTVS18VS1UTR-QX meets industry standards.
7.What is the process for return or replacement of PTVS18VS1UTR-QX?
All PTVS18VS1UTR-QX units undergo pre-shipment inspection (PSI). If there is an issue with PTVS18VS1UTR-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 PTVS18VS1UTR-QX part is unused and in its original packaging.
Return procedure for PTVS18VS1UTR-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PTVS18VS1UTR-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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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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