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Nexperia USA Inc. PTVS33VS1UR-QX
- Part No.:
- PTVS33VS1UR-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
PTVS33VS1UR-QX.pdf
- Description:
- PTVS33VS1UR-Q/SOD123W/SOD2
- Quantity:
- Payment:
- Shipping:
Inventory:7,676
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Product details
Overview
PTVS33VS1UR-Q from Nexperia is a unidirectional 400 W Transient Voltage Suppressor (TVS) in SOD123W (CFP3) package, designed for automotive-grade overvoltage protection. It features 33 V reverse standoff voltage (VRWM), 40.6 V maximum clamping voltage (VCL) at 53.3 A peak pulse current (IPPM), and <0.001 µA reverse leakage current - deployed in power supply rails of engine control units and infotainment systems.
For engineers reviewing the PTVS33VS1UR-Q datasheet, PTVS33VS1UR-Q pinout, PTVS33VS1UR-Q application, or PTVS33VS1UR-Q equivalent, key selection criteria include clamping performance under IEC 61643-321 10/1000 µs waveform, AEC-Q101 qualification status, thermal resistance to solder point (Rth(j-sp) = 18 K/W), and compatibility with high-density SMT layouts requiring ≤1 mm profile height.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging silicon avalanche breakdown to divert transient energy away from sensitive downstream circuitry. Its junction-to-solder-point thermal resistance of 18 K/W enables effective heat dissipation during repetitive surge events in automotive power domains.
The device complies with IEC 61643-321 (10/1000 µs waveform) and achieves 30 kV ESD immunity per IEC 61000-4-2 (contact/air discharge), with breakdown voltage tightly specified at 36.7–40.6 V and VRWM fixed at 33 V - ensuring reliable hold-off during normal 12 V/24 V system operation while triggering fast under load dump or ISO 7637-2 pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 33 V - stable reverse blocking voltage during nominal 12 V/24 V automotive supply operation |
| VCL @ IPPM | 40.6 V max at 53.3 A - limits downstream IC voltage stress during ISO 7637-2 Pulse 5a load dump |
| PPPM | 400 W - peak pulse power handling per IEC 61643-321 10/1000 µs waveform |
| IRM | <0.001 µA - negligible leakage current preserving battery drain budget in always-on modules |
| Rth(j-sp) | 18 K/W - low thermal resistance to cathode solder point, enabling PCB-level heat sinking in compact ECUs |
| AEC-Q101 | Qualified - validated for automotive use including temperature cycling, HTRB, and ESD stress |
| Package | SOD123W (CFP3) - 2.6 × 1.7 × 1.0 mm surface-mount footprint with 1 mm max height for low-profile assembly |
Pinout & Package
SOD123W (CFP3) plastic surface-mount package: 2-terminal, flat-lead, cathode-marked with bar; dimensions 2.6 mm × 1.7 mm × 1.0 mm; optimized for reflow soldering on FR4 PCBs with standard 1.2 mm × 1.4 mm solder pads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (K) | Cathode | Connected to protected line (e.g., 12 V rail); marking bar identifies this terminal; carries full surge current during clamping |
| 2 (A) | Anode | Connected to ground reference; completes conduction path during transient event; requires low-inductance ground plane routing |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 qualified - validated for temperature cycling, high-temp reverse bias, and ESD robustness in vehicle environments |
| Low-profile packaging | 1.0 mm max height - enables placement beneath connectors or in space-constrained ADAS sensor modules |
| High ESD immunity | 30 kV contact / 30 kV air discharge per IEC 61000-4-2 - protects against assembly-line and in-vehicle electrostatic events |
| Tight VBR tolerance | 36.7–40.6 V breakdown range - ensures predictable turn-on timing across production lots without overdesign margin |
| Low thermal resistance | Rth(j-sp) = 18 K/W - allows >50% higher surge duty cycle vs. standard SOD-123 when mounted on thermally enhanced pads |
Applications
| Engine Control Unit (ECU) Power Input | Infotainment System USB Port |
|---|---|
|
Use Scenario: Protects 12 V input stage of diesel/gasoline ECU against ISO 7637-2 Pulse 5a load dump transients up to 120 V. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed upstream of DC-DC converter input capacitor. Use Value: Clamps to ≤40.6 V within nanoseconds, preventing overvoltage damage to buck controller ICs rated for 42 V absolute max. |
Use Scenario: Shields USB 2.0 data lines and VBUS rail in head unit against ESD and cable-induced surges. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional TVS used on VBUS only due to grounded data lines. Use Value: Sub-1 µA leakage preserves sleep-mode current budget; 30 kV ESD rating exceeds IEC 61000-4-2 system-level test requirement. |
| Body Control Module (BCM) LIN Bus | ADAS Camera Power Rail |
|
Use Scenario: Safeguards LIN transceiver power pin against battery reversal and jump-start induced transients. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between fuse output and transceiver VCC pin. Use Value: 33 V VRWM matches typical LIN bus supply; 400 W PPPM handles sustained 100 ms surges without degradation. |
Use Scenario: Guards 5 V/3.3 V camera module power input against hot-swap and capacitive discharge spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on PMIC input, coordinated with ceramic bulk capacitance. Use Value: 1 mm height avoids interference with lens housing; Rth(j-sp) = 18 K/W maintains junction temp <125 °C under repeated 10/1000 µs pulses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33A-Q | Lower PPPM (400 W same), but higher VCL (48.4 V) and larger SMA package (2.4 mm height) | Less suitable for ultra-low-profile modules; higher clamping increases risk to 3.3 V logic downstream | Select when board space allows taller profile and legacy footprint compatibility is required |
| TPSMD33A | Same VRWM/VCL specs, but not AEC-Q101 qualified; Rth(j-a) = 220 K/W vs. 70 K/W for PTVS33VS1UR-Q | Not approved for automotive safety-critical functions; thermal derating needed above 70 °C ambient | Acceptable for industrial power supplies where qualification and thermal performance are non-critical |
Compared with SMAJ33A-Q and TPSMD33A, PTVS33VS1UR-Q delivers superior thermal management (18 K/W to solder point), lower clamping voltage (40.6 V), and guaranteed AEC-Q101 compliance - making it the preferred choice for space-constrained, thermally demanding automotive power nodes.
Availability
PTVS33VS1UR-Q is available at Aetrix Electronics and suitable for automotive ECU power inputs, infotainment VBUS protection, and ADAS camera power rails requiring stable component supply across multi-year vehicle production cycles.
Supply support for PTVS33VS1UR-Q 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 high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified components and advanced packaging.
The PTVSxS1UR-Q series targets automotive power rail protection, delivering AEC-Q101-compliant TVS diodes optimized for low-profile, high-surge, thermally efficient placement in modern E/E architectures.
FAQ
What is the maximum clamping voltage for PTVS33VS1UR-Q under IEC 61643-321 conditions?
The maximum clamping voltage (VCL) is 40.6 V at 53.3 A peak pulse current (IPPM), measured using the standardized 10/1000 µs current waveform per IEC 61643-321. This value is guaranteed across temperature and production lot, ensuring consistent overvoltage limiting in automotive load-dump scenarios.
Is PTVS33VS1UR-Q suitable for bidirectional transient protection?
No - PTVS33VS1UR-Q is a unidirectional TVS diode, intended for DC-biased lines like positive power rails. It conducts only when cathode voltage exceeds anode by ≥36.7 V. For AC or dual-polarity signal lines (e.g., CAN, LIN data), a bidirectional variant such as PTVS33VS1UR-S must be selected.
How does the SOD123W package improve thermal performance over standard SOD-123?
The SOD123W (CFP3) package reduces junction-to-solder-point thermal resistance to 18 K/W - 3.9× lower than typical SOD-123 (≈70 K/W). This is achieved via widened cathode tab and optimized internal die attach, enabling higher surge repetition rates without thermal runaway in automotive under-hood environments.
Does PTVS33VS1UR-Q require external series impedance for optimal protection?
Yes - like all TVS diodes, it must be placed downstream of a current-limiting element (e.g., fuse, PTC, or trace impedance) to prevent destructive follow-on current during sustained overvoltage. The device clamps quickly but relies on upstream impedance to limit total energy dissipated in the junction during long-duration faults.
PTVS33VS1UR-QX 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):
- 33V (Max)
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 7.5A
- 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
PTVS33VS1UR-QX FAQ
1.How can I place an order for PTVS33VS1UR-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for PTVS33VS1UR-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 PTVS33VS1UR-QX reliable?
The price and inventory of PTVS33VS1UR-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PTVS33VS1UR-QX is usually 5 days.
3.What payment methods are accepted for PTVS33VS1UR-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PTVS33VS1UR-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PTVS33VS1UR-QX?
PTVS33VS1UR-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PTVS33VS1UR-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 PTVS33VS1UR-QX?
For technical support, including PTVS33VS1UR-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PTVS33VS1UR-QX requirements.
6.How does Aetrix verify that PTVS33VS1UR-QX is sourced from the original manufacturer or authorized distributors?
All PTVS33VS1UR-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 PTVS33VS1UR-QX meets industry standards.
7.What is the process for return or replacement of PTVS33VS1UR-QX?
All PTVS33VS1UR-QX units undergo pre-shipment inspection (PSI). If there is an issue with PTVS33VS1UR-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 PTVS33VS1UR-QX part is unused and in its original packaging.
Return procedure for PTVS33VS1UR-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PTVS33VS1UR-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
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
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