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Nexperia USA Inc. PTVS18VS1UR/8X
- Part No.:
- PTVS18VS1UR/8X
- Manufacturer:
- Nexperia USA Inc.
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
PTVS18VS1UR/8X.pdf
- Description:
- TVS DIODE 18VWM 29.2VC SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:4,589
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Product details
Overview
PTVS18VS1UR/8X from Nexperia is a unidirectional 400 W Transient Voltage Suppressor (TVS) in SOD123W (CFP3) package, designed for high-energy transient overvoltage protection on DC power rails. It features 18 V reverse standoff voltage (VRWM), 22.1 V maximum clamping voltage (VCL) at 13.7 A peak pulse current (IPPM), and 0.001 µA reverse leakage at VRWM - enabling robust ESD and surge immunity in space-constrained industrial and power management circuits.
For engineers reviewing the PTVS18VS1UR/8X datasheet, PTVS18VS1UR/8X pinout, PTVS18VS1UR/8X application, or PTVS18VS1UR/8X equivalent, key selection criteria include its 1 mm profile for ultra-thin PCB layouts, AEC-Q101 qualification status (per revision history v.4), IEC 61643-321 (10/1000 µs) compliance, and precise 18 V standoff with low clamping ratio (VCL/VRWM ≈ 1.23).
Technical Context
This unidirectional TVS operates as a clamping device: under normal bias it presents high impedance (>1 GΩ at VRWM), but triggers into low-impedance conduction when transient voltage exceeds its breakdown threshold (VBR = 20.0–22.1 V). Its junction-to-solder-point thermal resistance is 18 K/W, supporting reliable power dissipation during repetitive surges.
The device uses planar silicon junction technology optimized for fast response (<1 ns), with cathode-anode polarity defined by a marking bar on the SOD123W body. It meets IEC 61000-4-2 contact discharge (30 kV) and MIL-STD-883 HBM (>4 kV) ESD standards without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 18 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin |
| VBR (min/typ/max) | 20.0 / 21.0 / 22.1 V - breakdown occurs within this range at 1 mA test current; sets precise overvoltage trip point |
| VCL @ IPPM | 29.2 V @ 13.7 A - clamped voltage during 10/1000 µs surge; determines protected IC's maximum stress level |
| PPPM | 400 W - peak pulse power handling per IEC 61643-321; enables protection against high-energy transients |
| IRM | 0.001 µA @ VRWM - ultra-low leakage ensures minimal standby current drain in battery-powered systems |
| Package | SOD123W (CFP3) - 2.6 × 1.7 × 1.0 mm surface-mount footprint with 1 mm height; optimized for automated assembly and thermal relief |
Pinout & Package
SOD123W (CFP3) plastic surface-mounted package with 2 terminals, 2.6 mm × 1.7 mm × 1.0 mm body dimensions and 1 mm profile. Cathode identified by molded marking bar.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to protected line side; marking bar aligns with this terminal; carries surge current to ground path |
| 2 | Anode (A) | Connected to system ground; completes clamping loop; must be low-inductance path for effective transient shunting |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low profile | 1 mm height enables use in ultra-thin consumer and automotive ECUs where Z-axis space is constrained |
| AEC-Q101 qualified | Qualified per Automotive Electronics Council standard for discrete semiconductors; supports deployment in non-safety-critical automotive modules |
| High ESD robustness | 30 kV IEC 61000-4-2 contact discharge rating eliminates need for secondary ESD protection stages |
| Thermal performance | 18 K/W junction-to-solder-point resistance allows sustained 400 W pulse dissipation with minimal board copper area |
Applications
| Industrial Power Rail Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) I/O module exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between input rail and chassis ground; responds within <1 ns to suppress >100 V spikes. Use Value: Limits rail voltage to ≤29.2 V during 13.7 A surge, protecting downstream DC-DC converters and microcontrollers rated for 36 V absolute max. |
Use Scenario: LIN bus power supply line in door module subjected to ISO 7637-2 Pulse 1 and Pulse 2a transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail; absorbs energy from coupled transients before reaching MCU and LIN transceiver. Use Value: Maintains 18 V standoff while clamping to 29.2 V, ensuring LIN PHY remains within its 40 V absolute maximum rating during 100 ms load dump events. |
| USB-C Power Delivery Input Stage | Smart Meter Auxiliary Power Supply |
|
Use Scenario: 20 V input path of USB-C PD sink controller encountering hot-plug and cable ESD events. IC Role / Device Role / Timing Role: First-line transient suppressor on VBUS rail; shunts ESD pulses before they reach buck converter and PD controller IC. Use Value: With 0.001 µA leakage and 29.2 V clamping, prevents false triggering of OVP circuits while surviving 30 kV contact discharge per IEC 61000-4-2. |
Use Scenario: 12 V auxiliary supply derived from mains transformer in utility smart meter, subject to lightning-induced surges on AC lines. IC Role / Device Role / Timing Role: Secondary surge protector after MOV-based primary stage; handles residual fast-rising transients missed by slower MOVs. Use Value: 400 W PPPM rating and 13.7 A IPPM enable absorption of residual 10/1000 µs surges up to 500 W-equivalent energy without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | DO-214AC package (4.5 mm height); 400 W PPPM; VBR = 20.0–22.2 V; VCL = 29.2 V @ 13.7 A | Larger footprint and height unsuitable for ultra-thin designs; higher Rth(j-a) limits thermal cycling endurance | Select when board space permits larger package and legacy DO-214AC footprint compatibility is required |
| 1.5SMC18A | DO-214AB package (2.6 mm height); 1500 W PPPM; VBR = 19.0–21.1 V; VCL = 29.2 V @ 51.7 A | Higher power rating but 3× larger footprint; not suitable for dense SMT layouts or thin-profile enclosures | Choose only when system-level surge requirements exceed 400 W and board real estate allows larger device |
Compared with SMAJ18A and 1.5SMC18A, PTVS18VS1UR/8X delivers identical clamping performance in a 70% smaller volume and 1 mm profile - making it optimal for next-generation compact industrial and automotive modules where Z-height and thermal interface efficiency are critical.
Availability
PTVS18VS1UR/8X is available at Aetrix Electronics and suitable for industrial power rail protection, automotive body control modules, and USB-C power delivery input stages requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified surge immunity.
Supply support for PTVS18VS1UR/8X 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, high-reliability components for automotive, industrial, and consumer markets, with leadership in logic, discrete, and MOSFET technologies.
The PTVSxS1UR series belongs to Nexperia's transient protection portfolio, engineered specifically for space-constrained DC power line protection with AEC-Q101 qualification, ultra-low profile packaging, and precise clamping performance across 3.3–64 V standoff range.
FAQ
Is PTVS18VS1UR/8X qualified for automotive use?
Yes - per revision history v.4 (December 2025), PTVS18VS1UR/8X is explicitly listed among the 33 types upgraded to standard AEC-Q101 qualification. It meets Stress Test Qualification for Discrete Semiconductors per AEC-Q101 Rev D, supporting use in non-safety-critical automotive modules such as body control units and infotainment power supplies.
What is the maximum clamping voltage under full-rated surge current?
At its rated peak pulse current of 13.7 A (IPPM), PTVS18VS1UR/8X clamps to a maximum of 29.2 V, measured per IEC 61643-321 10/1000 µs waveform. This value is guaranteed across temperature and process variation, and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
How does the SOD123W package affect thermal performance?
The SOD123W package achieves a junction-to-solder-point thermal resistance of 18 K/W, significantly lower than standard SMA or SMC packages. This enables efficient heat transfer to the PCB copper pour, allowing the device to sustain repeated 400 W pulses without exceeding 150 °C junction temperature - critical for reliability in thermally demanding industrial environments.
Can PTVS18VS1UR/8X replace older PTVS18VS1U parts?
No - PTVS18VS1UR/8X supersedes earlier PTVS18VS1U variants with updated qualification status, tighter parameter tolerances, and revised marking ('AK' per Table 4). The 'R' suffix denotes the current revision with AEC-Q101 compliance; legacy 'U' parts lack documented automotive qualification and may exhibit wider VBR spread or higher IRM.
PTVS18VS1UR/8X 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):
- 18V
- 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 ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
PTVS18VS1UR/8X FAQ
1.How can I place an order for PTVS18VS1UR/8X through Aetrix?
Please submit a Request for Quotation (RFQ) for PTVS18VS1UR/8X 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 PTVS18VS1UR/8X reliable?
The price and inventory of PTVS18VS1UR/8X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PTVS18VS1UR/8X is usually 5 days.
3.What payment methods are accepted for PTVS18VS1UR/8X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PTVS18VS1UR/8X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PTVS18VS1UR/8X?
PTVS18VS1UR/8X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PTVS18VS1UR/8X 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 PTVS18VS1UR/8X?
For technical support, including PTVS18VS1UR/8X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PTVS18VS1UR/8X requirements.
6.How does Aetrix verify that PTVS18VS1UR/8X is sourced from the original manufacturer or authorized distributors?
All PTVS18VS1UR/8X 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 PTVS18VS1UR/8X meets industry standards.
7.What is the process for return or replacement of PTVS18VS1UR/8X?
All PTVS18VS1UR/8X units undergo pre-shipment inspection (PSI). If there is an issue with PTVS18VS1UR/8X, 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 PTVS18VS1UR/8X part is unused and in its original packaging.
Return procedure for PTVS18VS1UR/8X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PTVS18VS1UR/8X Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
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.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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