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Nexperia USA Inc. PTVS18VS1UR-QX
- Part No.:
- PTVS18VS1UR-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
PTVS18VS1UR-QX.pdf
- Description:
- PTVS18VS1UR-Q/SOD123W/SOD2
- Quantity:
- Payment:
- Shipping:
Inventory:6,488
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Product details
Overview
PTVS18VS1UR-QX from Nexperia is a unidirectional 400 W Transient Voltage Suppressor (TVS) diode in SOD123W (CFP3) package, designed for automotive-grade overvoltage protection at 18 V reverse standoff voltage (VRWM), with 22.1 V maximum clamping voltage (VCL) at 29.2 A peak pulse current (IPPM), and qualified to AEC-Q101 for under-hood power rail and ECU protection.
For engineers reviewing the PTVS18VS1UR-QX datasheet, PTVS18VS1UR-QX pinout, PTVS18VS1UR-QX application, or PTVS18VS1UR-QX equivalent, this device supports high-reliability transient suppression in 12 V/24 V automotive systems, offers low leakage (IRM ≤ 0.1 µA), and delivers precise clamping performance validated per IEC 61643-321 (10/1000 µs waveform).
Technical Context
This unidirectional TVS operates as a clamping-type surge protector: it remains non-conductive below VRWM = 18 V, breaks down sharply at VBR = 20.0–22.1 V (typ/max), and limits transients to VCL ≤ 29.2 V during 10/1000 µs surges up to 400 W. Its cathode-anode polarity enables series connection on positive rails.
Thermal design is enabled by Rth(j-sp) = 18 K/W to solder point and Rth(j-a) = 70 K/W on ceramic PCB, supporting sustained operation at Tj ≤ 150 °C. ESD robustness includes ±30 kV contact discharge (IEC 61000-4-2) and 8 kV HBM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 18 V - Maximum continuous reverse operating voltage before clamping begins; matches 12 V automotive system nominal + tolerance margin. |
| VBR (min/typ/max) | 20.0 / 21.0 / 22.1 V - Breakdown occurs within this range at IR = 1 mA; ensures reliable turn-on before downstream IC damage thresholds. |
| VCL @ IPPM | 29.2 V - Clamped voltage at 29.2 A peak pulse current; guarantees protected circuit sees <30 V during worst-case 400 W surge. |
| IPPM | 29.2 A - Peak pulse current supported under 10/1000 µs waveform; directly derived from PPPM = 400 W and VCL. |
| IRM | 0.1 µA max at VRWM - Ultra-low reverse leakage preserves battery life and avoids false triggering in always-on automotive modules. |
| Package | SOD123W (CFP3) - 2.6 × 1.7 × 1.0 mm surface-mount package with 1 mm height; optimized for space-constrained engine control units and ADAS sensors. |
| AEC-Q101 | Qualified - Validated for automotive use including temperature cycling, humidity, and mechanical stress; suitable for under-hood deployment. |
Pinout & Package
SOD123W (CFP3) plastic surface-mount package: 2-terminal, flat lead, 2.6 mm × 1.7 mm × 1.0 mm body; marking bar denotes cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to protected line (e.g., 12 V rail); polarity must match forward-biased clamp direction toward ground. |
| 2 (A) | Anode | Connected to system ground; forms low-impedance path for surge current during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power rating | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a transients without derating in compact SMD footprint. |
| 18 V VRWM with tight VBR spread (20.0–22.1 V) | Ensures early, predictable clamping before 24 V system peaks exceed 25 V, minimizing stress on downstream DC-DC converters. |
| 0.1 µA max reverse leakage at 18 V | Prevents parasitic drain in always-on vehicle networks (e.g., CAN standby), extending battery-off time beyond 120 days. |
| AEC-Q101 qualification | Validates reliability across -55 °C to +150 °C ambient, including thermal shock and board flex, for engine control and lighting modules. |
| ±30 kV ESD immunity (IEC 61000-4-2) | Eliminates need for external ESD protection on infotainment and sensor interfaces, reducing BOM count and layout area. |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Lighting Driver |
|---|---|
|
Use Scenario: Protecting 12 V supply input of diesel/gasoline ECU against load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between fused battery rail and LDO input. Use Value: Limits transient voltage to ≤29.2 V during 400 W surges, preventing brownout or latch-up in microcontroller power domains. |
Use Scenario: Safeguarding LED driver ICs in headlamp modules exposed to inductive switching noise from motorized leveling actuators. IC Role / Device Role / Timing Role: Reverse-biased TVS across driver output to suppress flyback spikes from solenoid loads. Use Value: Clamps 10/1000 µs spikes to <30 V within nanoseconds, avoiding gate oxide breakdown in integrated MOSFET drivers. |
| Body Control Module (BCM) CAN Interface | Start-Stop System Battery Monitor |
|
Use Scenario: Protecting CAN transceiver VCC and data lines from ESD and coupled transients in door module wiring harnesses. IC Role / Device Role / Timing Role: Discrete TVS on transceiver power rail, coordinated with common-mode choke and data-line TVS. Use Value: Withstands ±30 kV contact ESD and clamps fast edges to preserve signal integrity without affecting 1 Mbps CAN timing. |
Use Scenario: Shielding fuel pump controller and battery sensor ICs from cranking-induced dips and jump-start surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main 12 V distribution bus feeding start-stop logic and monitoring circuits. Use Value: Maintains stable 18 V clamping threshold across temperature, ensuring accurate voltage measurement during 16 V jump-start conditions. |
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-Q | Lower PPPM = 400 W but higher VCL = 32.4 V at same IPPM; SMA package (4.5 × 2.7 mm) vs SOD123W (2.6 × 1.7 mm). | Less suitable for ultra-compact ECU layouts; requires larger PCB area and has 2.2× higher thermal resistance (Rth(j-a)). | Select when legacy SMA footprint compatibility is required and board space allows. |
| TPSMA6L18A | Same VRWM and VCL specs, but rated only to AEC-Q200 (not Q101); slightly higher IRM = 1 µA at 18 V. | Not qualified for critical powertrain locations; acceptable for interior modules with lower reliability requirements. | Choose for cost-sensitive cabin electronics where full AEC-Q101 is not mandated. |
Compared with SMAJ18A-Q and TPSMA6L18A, PTVS18VS1UR-QX provides superior space efficiency, lower clamping voltage, and full AEC-Q101 validation-making it optimal for next-generation compact, high-reliability automotive power nodes.
Availability
PTVS18VS1UR-QX is available at Aetrix Electronics and suitable for automotive power supply protection, engine control unit (ECU) transient suppression, and body control module (BCM) interface hardening requiring stable component supply and long-term automotive lifecycle support.
Supply support for PTVS18VS1UR-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 global semiconductor expert focused on essential efficiency-enhancing components, delivering high-performance, reliable, and scalable solutions for automotive, industrial, and consumer markets.
PTVS18VS1UR-QX belongs to the PTVSxS1UR-Q series of AEC-Q101-qualified TVS diodes engineered specifically for robust transient protection in harsh automotive environments-including under-hood, lighting, and powertrain systems.
FAQ
What is the maximum clamping voltage of PTVS18VS1UR-QX under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 29.2 V at 29.2 A peak pulse current (IPPM), measured per IEC 61643-321. This value is guaranteed across -55 °C to +150 °C junction temperature and defines the upper voltage limit imposed on protected circuits during standardized surge events.
Is PTVS18VS1UR-QX suitable for bidirectional transient protection?
No-PTVS18VS1UR-QX is a unidirectional TVS diode, configured for single-polarity clamping (anode to ground). It does not protect against negative-going transients on the protected line. For bidirectional protection, a separate device such as PTVS18VS1UR-Q (dual-diode configuration) or discrete back-to-back arrangement is required.
How does the SOD123W package affect thermal performance compared to SMA?
The SOD123W package achieves Rth(j-sp) = 18 K/W to solder point-over 2× better than typical SMA packages (~40 K/W)-due to its low-profile, wide cathode tab and optimized thermal pad layout. This enables higher sustained power dissipation in dense automotive PCBs without thermal vias.
Does PTVS18VS1UR-QX require derating at elevated ambient temperatures?
Yes-peak pulse power must be derated above Tamb = 25 °C per the thermal derating curve in the datasheet. At 125 °C ambient, PPPM is reduced to ~240 W due to junction temperature limits (Tj ≤ 150 °C); layout with adequate copper pour and thermal relief is essential for full 400 W capability.
PTVS18VS1UR-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Package/Case:
- SOD-123W
- Series:
- PTVSxS1UR
- 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 ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
PTVS18VS1UR-QX FAQ
1.How can I place an order for PTVS18VS1UR-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for PTVS18VS1UR-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 PTVS18VS1UR-QX reliable?
The price and inventory of PTVS18VS1UR-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PTVS18VS1UR-QX is usually 5 days.
3.What payment methods are accepted for PTVS18VS1UR-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PTVS18VS1UR-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PTVS18VS1UR-QX?
PTVS18VS1UR-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PTVS18VS1UR-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 PTVS18VS1UR-QX?
For technical support, including PTVS18VS1UR-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PTVS18VS1UR-QX requirements.
6.How does Aetrix verify that PTVS18VS1UR-QX is sourced from the original manufacturer or authorized distributors?
All PTVS18VS1UR-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 PTVS18VS1UR-QX meets industry standards.
7.What is the process for return or replacement of PTVS18VS1UR-QX?
All PTVS18VS1UR-QX units undergo pre-shipment inspection (PSI). If there is an issue with PTVS18VS1UR-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 PTVS18VS1UR-QX part is unused and in its original packaging.
Return procedure for PTVS18VS1UR-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PTVS18VS1UR-QX 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.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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