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Nexperia USA Inc. PTVS18VS1UR,115
- Part No.:
- PTVS18VS1UR,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
PTVS18VS1UR,115.pdf
- Description:
- TVS DIODE 18VWM 29.2VC SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:335,173
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Product details
Overview
PTVS18VS1UR,115 from Nexperia is a unidirectional 400 W Transient Voltage Suppressor (TVS) in SOD123W (CFP3) package, designed for clamping transient overvoltages on DC power rails. It features a 18 V reverse standoff voltage (VRWM), 21 V typical breakdown voltage (VBR), 29.2 V maximum clamping voltage (VCL) at 13.7 A peak pulse current (IPPM), and <0.001 µA reverse leakage at VRWM - deployed in industrial power supply protection circuits.
For engineers reviewing the PTVS18VS1UR,115 datasheet, PTVS18VS1UR,115 pinout, PTVS18VS1UR,115 application, or PTVS18VS1UR,115 equivalent, key selection criteria include clamping performance under IEC 61643-321 10/1000 µs waveform, thermal resistance to solder point (Rth(j-sp) = 18 K/W), AEC-Q101 qualification status, and compatibility with high-density SMT layouts requiring ≤1 mm profile.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping device across DC supply lines, triggering conduction when transient voltage exceeds its 21 V typical breakdown threshold. Its silicon p-n junction structure enables fast response (<1 ns) to ESD and surge events per IEC 61000-4-2 (30 kV contact discharge) and MIL-STD-883 HBM (>4 kV).
Rated for 400 W peak pulse power (PPPM) under 10/1000 µs waveform, it sustains 13.7 A IPPM while limiting voltage to ≤29.2 V - enabling robust protection of downstream 18 V-rated ICs such as automotive MCUs, industrial PMICs, and sensor front-ends without crowbar action.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 18 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC rail margin. |
| VBR (typ) | 21.0 V at IR = 1 mA - Voltage at which breakdown begins; sets minimum overvoltage trip threshold. |
| VCL (max) | 29.2 V at IPPM = 13.7 A - Clamped voltage during worst-case surge; must stay below protected IC's absolute max rating. |
| PPPM | 400 W (10/1000 µs) - Peak energy-handling capability; determines survivability against IEC 61643-321 surges. |
| IRM | 0.001 µA at VRWM - Ultra-low leakage ensures minimal standby power loss in battery-backed systems. |
| Rth(j-sp) | 18 K/W - Thermal resistance from junction to cathode solder point; enables effective heat dissipation on standard PCB copper. |
| ESD Rating | 30 kV contact discharge (IEC 61000-4-2) - Confirms immunity to common handling and system-level ESD events. |
Pinout & Package
SOD123W (CFP3) surface-mount plastic package: 2.6 mm × 1.7 mm × 1.0 mm body, flat lead profile, marking bar indicating cathode. Optimized for automated reflow assembly and space-constrained board layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (K) | Connected to protected line (e.g., +18 V rail); polarity-sensitive - reverse connection disables protection. |
| 2 | Anode (A) | Connected to ground reference; forms low-impedance shunt path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Enables single-device protection against severe transients (e.g., ISO 7637-2 Pulse 1/2a/5a) on 18 V systems. |
| 1 mm package height | Supports ultra-thin end equipment (e.g., portable industrial controllers, automotive body modules) without mechanical interference. |
| AEC-Q101 qualified | Validated for automotive-grade reliability (HTOL, TC, UHAST), permitting use in non-safety-critical vehicle subsystems. |
| Low Rth(j-sp) = 18 K/W | Allows >80% of surge energy to dissipate via cathode pad, reducing local PCB temperature rise during repeated surges. |
| 0.001 µA IRM at VRWM | Minimizes quiescent current drain in always-on 18 V monitoring circuits (e.g., CAN transceiver bias rails). |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: 18 V DC input rail of programmable logic controller (PLC) power module exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between input rail and chassis ground to limit surge voltage to <30 V. Use Value: Prevents damage to upstream DC-DC converters and downstream 18 V microcontrollers during 100 V/50 ms load dump events. |
Use Scenario: 18 V supply line feeding LIN transceivers and window lift motor drivers in door module. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp suppressing ISO 7637-2 Pulse 5a (110 V/100 ms) induced by alternator regulation faults. Use Value: Maintains functional integrity of LIN communication and motor control ICs during battery voltage spikes up to 110 V. |
| Telecom Remote Radio Unit (RRU) | Medical Diagnostic Sensor Interface |
|
Use Scenario: 18 V auxiliary power rail in outdoor 5G base station RRU subjected to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary surge suppression stage before secondary filtering and LDO regulation. Use Value: Limits transient voltage to ≤29.2 V within 1 ns, protecting sensitive RF front-end amplifiers and ADCs from latch-up. |
Use Scenario: 18 V bias supply for high-precision analog front-end (AFE) in portable ultrasound probe. IC Role / Device Role / Timing Role: Low-leakage transient suppressor ensuring <1 nA added error current into precision current sources. Use Value: Preserves sub-µV offset stability and SNR of AFE while surviving 30 kV ESD contact discharges during clinical handling. |
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 × 2.7 mm × 2.2 mm); 400 W PPPM; VCL = 29.2 V at 13.7 A; VRWM = 18 V. | Larger footprint and 2.2 mm height - unsuitable for ultra-thin or high-density layouts where SOD123W fits. | Select when board space allows larger package and legacy DO-214AC footprint compatibility is required. |
| SMF18A | SOD-123 package (same outline but non-AEC-Q101; 200 W PPPM; VCL = 29.2 V at 6.8 A; VRWM = 18 V. | Half the surge rating and no automotive qualification - insufficient for ISO 7637-2 Pulse 5a or AEC-compliant designs. | Select only for cost-sensitive, non-automotive industrial applications with lower surge exposure profiles. |
Compared with SMAJ18A and SMF18A, PTVS18VS1UR,115 uniquely combines AEC-Q101 qualification, 400 W surge rating, and 1 mm height in SOD123W - making it the only option for space-constrained automotive or industrial designs requiring full IEC 61643-321 compliance.
Availability
PTVS18VS1UR,115 is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, telecom remote radio units, and medical diagnostic sensor interfaces requiring stable component supply and guaranteed long-term continuity.
Supply support for PTVS18VS1UR,115 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 expert delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, miniaturization, and automotive-grade quality.
The PTVSxS1UR series belongs to Nexperia's transient protection portfolio, engineered specifically for high-power, low-profile DC rail protection in automotive and industrial environments where AEC-Q101 reliability and space constraints are critical.
FAQ
What is the maximum clamping voltage of PTVS18VS1UR,115 under rated surge conditions?
The maximum 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 protected 18 V systems remain within safe operating limits during standardized surge events, including ISO 7637-2 Pulse 5a.
Is PTVS18VS1UR,115 qualified for automotive use?
Yes - PTVS18VS1UR,115 is AEC-Q101 qualified per the revision history (v.4, December 2025), confirming stress-test validation for discrete semiconductors in automotive applications. However, it is not intended for safety-critical systems like airbag or brake control ECUs.
How does the SOD123W package improve thermal performance compared to standard SOD-123?
The SOD123W (CFP3) package features an extended cathode pad that reduces thermal resistance to solder point (Rth(j-sp) = 18 K/W), versus ~30–40 K/W for standard SOD-123. This enables more efficient heat transfer to PCB copper, sustaining higher surge repetition rates without junction overheating.
Can PTVS18VS1UR,115 replace PTVS18VS1UR without changes to the PCB layout?
Yes - PTVS18VS1UR,115 uses the same SOD123W (CFP3) package as PTVS18VS1UR, with identical 2.6 mm × 1.7 mm × 1.0 mm dimensions and pin 1 (cathode) marking bar location. The ,115 suffix denotes tape-and-reel packaging; electrical and mechanical specs are identical.
PTVS18VS1UR,115 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,115 FAQ
1.How can I place an order for PTVS18VS1UR,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PTVS18VS1UR,115 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,115 reliable?
The price and inventory of PTVS18VS1UR,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PTVS18VS1UR,115 is usually 5 days.
3.What payment methods are accepted for PTVS18VS1UR,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PTVS18VS1UR,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PTVS18VS1UR,115?
PTVS18VS1UR,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PTVS18VS1UR,115 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,115?
For technical support, including PTVS18VS1UR,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PTVS18VS1UR,115 requirements.
6.How does Aetrix verify that PTVS18VS1UR,115 is sourced from the original manufacturer or authorized distributors?
All PTVS18VS1UR,115 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,115 meets industry standards.
7.What is the process for return or replacement of PTVS18VS1UR,115?
All PTVS18VS1UR,115 units undergo pre-shipment inspection (PSI). If there is an issue with PTVS18VS1UR,115, 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,115 part is unused and in its original packaging.
Return procedure for PTVS18VS1UR,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PTVS18VS1UR,115 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.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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