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Nexperia USA Inc. PTVS45VS1UR-QX
- Part No.:
- PTVS45VS1UR-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
PTVS45VS1UR-QX.pdf
- Description:
- PTVS45VS1UR-Q/SOD123W/SOD2
- Quantity:
- Payment:
- Shipping:
Inventory:8,542
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Product details
Overview
PTVS45VS1UR-QX from Nexperia is a unidirectional 400 W Transient Voltage Suppressor (TVS) diode in SOD123W (CFP3) package, designed for automotive-grade overvoltage protection at 45 V reverse standoff voltage (VRWM), with clamping voltage VCL = 72.7 V at IPPM = 72.7 A and IRM ≤ 0.001 µA at VRWM.
For engineers reviewing the PTVS45VS1UR-QX datasheet, PTVS45VS1UR-QX pinout, PTVS45VS1UR-QX application, or PTVS45VS1UR-QX equivalent, key selection criteria include AEC-Q101 qualification, 10/1000 µs IEC 61643-321 pulse handling, low-profile 1 mm height, and cathode-anode polarity alignment for PCB-level surge suppression in 12 V–48 V automotive power rails.
Technical Context
This unidirectional TVS operates as a clamping device in reverse-biased configuration, triggering at breakdown voltage VBR = 50.0–55.3 V (min–max) to limit transient energy by diverting surge current away from sensitive downstream circuitry. Its junction-to-solder-point thermal resistance Rth(j-sp) = 18 K/W enables effective heat dissipation during repetitive transients.
The device complies with IEC 61643-321 (10/1000 µs waveform), supports ESD immunity up to ±30 kV (IEC 61000-4-2 contact/air), and maintains leakage current below 1 nA at VRWM - critical for low-power always-on automotive modules such as body control units and sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 45 V - maximum continuous reverse operating voltage before clamping activation; defines system rail compatibility with 48 V automotive architectures. |
| VBR (min–max) | 50.0–55.3 V - breakdown voltage range at IR = 1 mA; ensures predictable turn-on margin above VRWM for robust noise immunity. |
| VCL @ IPPM | 72.7 V - clamping voltage at peak pulse current of 72.7 A; determines maximum voltage seen by protected ICs during ISO 7637-2 pulse 5a/b events. |
| PPPM | 400 W - rated peak pulse power per IEC 61643-321 (10/1000 µs); sustains high-energy surges without degradation in automotive load-dump scenarios. |
| IRM | ≤ 0.001 µA - reverse leakage at VRWM; minimizes standby power loss in battery-sensitive applications like telematics and ADAS sensors. |
| Package | SOD123W (CFP3) - 2.6 × 1.7 × 1.0 mm surface-mount package with 1 mm profile; enables high-density layout on compact ECUs and ADAS domain controllers. |
| AEC-Q101 | Qualified - certified for automotive discrete semiconductors; guarantees reliability under temperature cycling, humidity, and mechanical stress per AEC stress test requirements. |
Pinout & Package
SOD123W (CFP3) plastic surface-mount package with 2 terminals, 2.6 mm × 1.7 mm × 1.0 mm body dimensions and marking bar indicating cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to protected circuit's positive rail or signal line; polarity must match forward-bias direction of downstream rectification or regulation stage. |
| 2 (A) | Anode | Connected to ground or chassis return path; forms low-impedance shunt path for transient current during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 qualified - validated for under-hood and cabin environments including extended temperature (-55 °C to +150 °C) and vibration endurance. |
| Low-profile mounting | 1 mm max height - allows placement beneath connectors or near edge-mounted components in space-constrained ADAS camera modules and radar ECUs. |
| High ESD robustness | ±30 kV contact/air discharge (IEC 61000-4-2) - protects CAN FD, LIN, and SENT interfaces from electrostatic coupling during assembly and field operation. |
| Stable leakage performance | IRM ≤ 0.001 µA at VRWM - eliminates measurable bias current error in precision voltage monitoring circuits used in battery management systems. |
| Thermal efficiency | Rth(j-sp) = 18 K/W - enables reliable operation at elevated ambient temperatures without derating when soldered to copper pour on 2-layer FR4 boards. |
Applications
| Automotive Power Rail Protection | Body Control Module (BCM) Input Protection |
|---|---|
|
Use Scenario: Suppresses load dump transients (ISO 7637-2 Pulse 5a, 5b) on 48 V auxiliary power distribution networks in hybrid electric vehicles. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery feed and DC-DC converter input, activated within nanoseconds of overvoltage onset. Use Value: Limits peak voltage to 72.7 V during 72.7 A surge, preventing damage to 80 V-rated input MOSFETs and gate drivers in buck converters. |
Use Scenario: Guards microcontroller GPIO and LIN transceiver inputs against ESD and coupled transients in door module electronics. IC Role / Device Role / Timing Role: Reverse-biased TVS connected between LIN bus line and ground, responding to fast-rising ESD pulses with sub-1 ns latency. Use Value: Withstands ±30 kV contact discharge while maintaining <1 nA leakage, ensuring no interference with LIN bus idle-state voltage stability. |
| ADAS Camera Power Interface | Electric Power Steering (EPS) Sensor Line Protection |
|
Use Scenario: Protects 12 V camera power input from ignition-induced spikes and alternator ripple in surround-view systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail upstream of LDO regulators supplying image sensor and ISP ASIC. Use Value: Clamps 400 W surges to 72.7 V with minimal voltage overshoot, preserving regulator dropout margin and avoiding brownout resets during engine cranking. |
Use Scenario: Shields analog torque sensor outputs (e.g., Wheatstone bridge) from inductive kickback in EPS motor driver feedback loops. IC Role / Device Role / Timing Role: Low-leakage TVS placed across differential sensor lines to ground, suppressing common-mode transients without distorting mV-level signals. Use Value: IRM ≤ 0.001 µA prevents offset drift in precision instrumentation amplifiers, maintaining torque measurement accuracy within ±0.5% FS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45A-Q | Lower PPPM (400 W same), but higher VCL = 73.0 V at IPPM = 72.5 A; VRWM = 45.0 V identical; SMA package (4.5 × 2.7 × 2.2 mm). | Larger footprint and 2.2 mm height limits use in ultra-thin modules; thermal resistance Rth(j-a) ~ 50 K/W vs. 70 K/W for PTVS45VS1UR-QX. | Select when existing SMA footprint is fixed and board space permits taller component; avoid where 1 mm height or AEC-Q101 requalification is required. |
| TPSMD45A | Same VRWM (45 V), but lower PPPM = 300 W; VCL = 73.0 V at IPPM = 61.5 A; DO-214AB package (7.1 × 6.2 × 2.3 mm). | Substantially larger size and lower surge rating make it unsuitable for high-reliability 48 V automotive nodes exposed to frequent load dumps. | Only consider for cost-sensitive non-automotive industrial applications where 300 W rating suffices and board area is unconstrained. |
Compared with SMAJ45A-Q and TPSMD45A, PTVS45VS1UR-QX delivers identical VRWM and superior height constraint (1 mm), tighter VCL consistency (72.7 V), and AEC-Q101 validation - making it the optimal choice for next-generation compact, high-surge automotive power interfaces.
Availability
PTVS45VS1UR-QX is available at Aetrix Electronics and suitable for automotive power rail protection, ADAS camera interface hardening, and body control module surge suppression requiring stable component supply across multi-year vehicle production cycles.
Supply support for PTVS45VS1UR-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.
PTVS45VS1UR-QX belongs to the PTVSxS1UR-Q series of AEC-Q101-qualified unidirectional TVS diodes engineered specifically for robust transient protection in 12 V–64 V automotive electrical systems.
FAQ
What is the maximum clamping voltage of PTVS45VS1UR-QX under full-rated surge conditions?
The clamping voltage VCL is 72.7 V at rated peak pulse current IPPM = 72.7 A, measured per IEC 61643-321 (10/1000 µs waveform). This value is guaranteed across the full operating temperature range (−55 °C to +150 °C) and defines the upper voltage bound seen by protected circuitry during worst-case transients.
Does PTVS45VS1UR-QX support bidirectional transient suppression?
No - PTVS45VS1UR-QX is a unidirectional TVS diode, configured for reverse-biased operation only. It provides clamping protection against positive transients on the cathode side relative to anode (ground). For bidirectional protection, two devices in series opposition or a dedicated bidirectional TVS such as PTVS45VS1UR-S (not Q-series) would be required.
How does the SOD123W package affect thermal performance in high-density PCB layouts?
The SOD123W package achieves Rth(j-sp) = 18 K/W to the cathode solder point, enabling efficient heat transfer into PCB copper pours. In 2-layer FR4 designs with standard footprint and 1 cm² cathode pad, its thermal resistance remains stable up to 125 °C ambient - critical for sustained operation in engine bay ECUs without forced airflow.
Is PTVS45VS1UR-QX compatible with lead-free reflow soldering processes?
Yes - the device is qualified for lead-free reflow per J-STD-020, supporting peak temperatures up to 260 °C. The recommended reflow profile uses a 60–90 second time above liquidus (TAL) at 235–245 °C, with preheat ramp rates ≤ 3 °C/s. Footprint dimensions and stencil recommendations are provided in Nexperia document sod123w_fr (Issue date 20-02-28).
PTVS45VS1UR-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):
- 45V (Max)
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 5.5A
- 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
PTVS45VS1UR-QX FAQ
1.How can I place an order for PTVS45VS1UR-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for PTVS45VS1UR-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 PTVS45VS1UR-QX reliable?
The price and inventory of PTVS45VS1UR-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PTVS45VS1UR-QX is usually 5 days.
3.What payment methods are accepted for PTVS45VS1UR-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PTVS45VS1UR-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PTVS45VS1UR-QX?
PTVS45VS1UR-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PTVS45VS1UR-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 PTVS45VS1UR-QX?
For technical support, including PTVS45VS1UR-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PTVS45VS1UR-QX requirements.
6.How does Aetrix verify that PTVS45VS1UR-QX is sourced from the original manufacturer or authorized distributors?
All PTVS45VS1UR-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 PTVS45VS1UR-QX meets industry standards.
7.What is the process for return or replacement of PTVS45VS1UR-QX?
All PTVS45VS1UR-QX units undergo pre-shipment inspection (PSI). If there is an issue with PTVS45VS1UR-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 PTVS45VS1UR-QX part is unused and in its original packaging.
Return procedure for PTVS45VS1UR-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PTVS45VS1UR-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.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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