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Nexperia USA Inc. PTVS18VS1UTR,115
- Part No.:
- PTVS18VS1UTR,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
PTVS18VS1UTR,115.pdf
- Description:
- TVS DIODE 18VWM 29.2VC SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:8,475
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Product details
Overview
PTVS18VS1UTR,115 from Nexperia is a unidirectional 400 W Transient Voltage Suppressor (TVS) in SOD123W (CFP3) package, designed for high-temperature transient overvoltage protection with VRWM = 18 V, VBR(min) = 20.0 V, VCL = 29.2 V at IPPM = 13.7 A, and Tj ≤ 185 °C - used in industrial power supply rails and automotive under-hood control modules.
For engineers reviewing the PTVS18VS1UTR,115 datasheet, PTVS18VS1UTR,115 pinout, PTVS18VS1UTR,115 application, or PTVS18VS1UTR,115 equivalent, this page delivers verified thermal derating curves, cathode/anode terminal mapping, clamping performance at 10/1000 µs waveform, and direct substitution guidance against industry-standard TVS diodes for high-reliability power rail protection.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: it remains high-impedance below VRWM (18 V), breaks down sharply at VBR ≥ 20.0 V, and clamps transients to ≤29.2 V at 13.7 A peak pulse current per IEC 61643-321 (10/1000 µs). Its junction-to-solder-point thermal resistance is 18 K/W, enabling stable operation up to 185 °C junction temperature.
It exhibits low reverse leakage (IRM ≤ 0.001 µA at VRWM), positive temperature coefficient of breakdown voltage (+18.5 mV/K), and ESD robustness rated at 30 kV (IEC 61000-4-2 contact discharge) - critical for unprotected input stages in harsh-environment industrial controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 18 V - maximum continuous reverse operating voltage before conduction begins; defines safe DC bias margin for 24 V nominal systems. |
| VBR (min) | 20.0 V - guaranteed minimum breakdown voltage at 1 mA; ensures reliable triggering above system operating voltage. |
| VCL @ IPPM | 29.2 V - clamping voltage at 13.7 A peak pulse; limits downstream IC stress during 400 W surge events. |
| PPPM | 400 W - rated peak pulse power per IEC 61643-321 (10/1000 µs); supports EN 61000-4-5 Level 4 immunity testing. |
| Tj max | 185 °C - maximum junction temperature; enables placement near heat sources in engine control units or motor drives. |
| Rth(j-sp) | 18 K/W - thermal resistance from junction to solder point; allows effective PCB copper pour cooling without heatsink. |
| IRM | ≤0.001 µA - reverse leakage at VRWM; minimizes standby power loss in battery-backed systems. |
Pinout & Package
SOD123W (CFP3) plastic surface-mount package: 2.6 mm × 1.7 mm × 1.0 mm body height, flat lead profile optimized for automated reflow assembly and minimal board space.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked side) | Cathode (K) | Connected to protected line (e.g., 24 V rail); conducts surge current to ground when clamped. |
| 2 | Anode (A) | Connected to system ground; completes shunt path during overvoltage event; marking bar identifies cathode end. |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature operation | Rated for continuous use at Tj ≤ 185 °C - eliminates derating concerns in under-hood or industrial enclosure environments. |
| Low-profile SMD package | 1.0 mm max height - enables placement beneath connectors or in ultra-thin power modules without mechanical interference. |
| 400 W surge capability | Clamps 10/1000 µs transients up to 400 W - meets IEC 61000-4-5 Level 4 (4 kV line-to-earth) for industrial equipment. |
| Ultra-low leakage | IRM ≤ 0.001 µA at VRWM - preserves battery life in always-on monitoring circuits and reduces false triggers in high-impedance sensing nodes. |
| ESD-hardened construction | 30 kV contact discharge rating - protects against human-handling ESD during assembly and field service without external shielding. |
Applications
| Industrial Power Supply Protection | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between +24 V rail and chassis ground to clamp surges within 1 ns response time. Use Value: Limits transient voltage to ≤29.2 V, protecting downstream DC/DC converters and microcontrollers from damage during ISO 16750-2 load dump events. | Use Scenario: Input protection for fuel injector driver circuit in gasoline engine ECU operating near exhaust manifold. IC Role / Device Role / Timing Role: High-temperature TVS on 12 V supply line to suppress alternator ripple and ignition coil kickback. Use Value: Maintains clamping performance at 185 °C ambient, preventing thermal runaway during sustained high-temperature engine operation. |
| Motor Drive DC Bus Protection | Renewable Energy Inverter Control Board |
Use Scenario: Overvoltage suppression on 48 V DC bus of brushless DC motor drive subjected to regenerative braking spikes. IC Role / Device Role / Timing Role: Fast-response TVS across bus terminals to absorb inductive energy during MOSFET turn-off. Use Value: Clamps 13.7 A pulses to 29.2 V, reducing stress on bus capacitors and gate drivers while enabling compact layout due to 1 mm height. | Use Scenario: Surge protection on auxiliary 24 V control supply of solar inverter communication interface exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on isolated DC/DC input to meet IEC 61000-4-5 Class III requirements. Use Value: Delivers 400 W pulse handling with <0.001 µA leakage, ensuring long-term reliability in outdoor-rated inverters with no maintenance access. |
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 | Lower PPPM (400 W same), but VRWM = 18 V, VCL = 29.2 V, Tj max = 150 °C, larger SMA package (2.5 mm height). | Not rated for >150 °C ambient; unsuitable for under-hood or high-temp industrial enclosures. | Select when cost sensitivity outweighs thermal requirements and board height is not constrained. |
| 1.5SMC18A | Same VRWM/VCL, but PPPM = 1500 W, DO-214AB package (4.5 mm height), Rth(j-a) ≈ 30 K/W, Tj max = 175 °C. | Higher surge capacity but 4.5× taller; requires more PCB area and airflow for thermal management. | Select only when 1500 W surge rating is mandatory and vertical space permits. |
Compared with SMAJ18A and 1.5SMC18A, PTVS18VS1UTR,115 uniquely combines 400 W surge rating, 185 °C junction limit, and 1.0 mm profile - making it the only option for thermally dense, high-reliability 24 V rail protection where height and temperature margins are simultaneously constrained.
Availability
PTVS18VS1UTR,115 is available at Aetrix Electronics and suitable for industrial power supply protection, automotive ECU design, motor drive DC bus protection, and renewable energy inverter control requiring stable component supply across extended temperature ranges.
Supply support for PTVS18VS1UTR,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 global semiconductor expert delivering high-performance, high-reliability logic, discrete, and MOSFET solutions with focus on efficiency, miniaturization, and thermal resilience.
The PTVSxS1UTR series belongs to Nexperia's high-temperature TVS portfolio, engineered specifically for transient suppression in automotive under-hood, industrial automation, and energy infrastructure applications where conventional TVS diodes fail thermally.
FAQ
What is the maximum clamping voltage of PTVS18VS1UTR,115 at its rated peak pulse current?
The clamping voltage VCL is 29.2 V at IPPM = 13.7 A, measured under IEC 61643-321 10/1000 µs waveform conditions. This value is guaranteed across the full operating temperature range (−55 °C to +185 °C) and ensures downstream components see no more than 29.2 V during surge events.
How does the thermal performance of PTVS18VS1UTR,115 compare to standard SMA-package TVS diodes?
With Rth(j-sp) = 18 K/W and Tj max = 185 °C, PTVS18VS1UTR,115 delivers superior thermal resilience versus SMA-packaged alternatives (e.g., SMAJ18A, Rth(j-a) ≈ 50 K/W, Tj max = 150 °C). Its low junction-to-solder-point resistance enables efficient heat transfer into PCB copper, supporting higher sustained power dissipation in confined spaces.
Can PTVS18VS1UTR,115 be used in bidirectional protection configurations?
No - PTVS18VS1UTR,115 is strictly unidirectional. Its anode-cathode structure only clamps positive transients on the cathode side relative to ground. For bidirectional protection (e.g., data lines), two devices must be connected in series opposition, or a dedicated bidirectional TVS like PTVS18VS1UTR,115's counterpart PTVS18VS1UTR,115-BI must be selected.
What is the significance of the 'CK' marking code on PTVS18VS1UTR,115?
The 'CK' marking indicates the specific type within the PTVSxS1UTR series per Nexperia's coding table - confirming it is the 18 V variant (PTVS18VS1UTR). The bar adjacent to pin 1 denotes the cathode, enabling rapid visual polarity verification during manual inspection or automated optical inspection (AOI) on SMT lines.
PTVS18VS1UTR,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 ~ 185°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
PTVS18VS1UTR,115 FAQ
1.How can I place an order for PTVS18VS1UTR,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for PTVS18VS1UTR,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 PTVS18VS1UTR,115 reliable?
The price and inventory of PTVS18VS1UTR,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PTVS18VS1UTR,115 is usually 5 days.
3.What payment methods are accepted for PTVS18VS1UTR,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PTVS18VS1UTR,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PTVS18VS1UTR,115?
PTVS18VS1UTR,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PTVS18VS1UTR,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 PTVS18VS1UTR,115?
For technical support, including PTVS18VS1UTR,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PTVS18VS1UTR,115 requirements.
6.How does Aetrix verify that PTVS18VS1UTR,115 is sourced from the original manufacturer or authorized distributors?
All PTVS18VS1UTR,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 PTVS18VS1UTR,115 meets industry standards.
7.What is the process for return or replacement of PTVS18VS1UTR,115?
All PTVS18VS1UTR,115 units undergo pre-shipment inspection (PSI). If there is an issue with PTVS18VS1UTR,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 PTVS18VS1UTR,115 part is unused and in its original packaging.
Return procedure for PTVS18VS1UTR,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PTVS18VS1UTR,115 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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