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Vishay General Semiconductor - Diodes Division P6SMB39CA-E3/52
- Part No.:
- P6SMB39CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB39CA-E3/52.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB39CA-E3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR) at 1 mA, 53.9 V maximum clamping voltage (VC) at 11.1 A peak pulse current (IPPM), and 600 W peak pulse power capability with a 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P6SMB39CA-E3/52 datasheet, P6SMB39CA-E3/52 pinout, P6SMB39CA-E3/52 application, or P6SMB39CA-E3/52 equivalent, this device delivers verified bidirectional surge suppression with AEC-Q101 qualification available, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability board-level ESD and lightning transient protection design.
Technical Context
The P6SMB39CA-E3/52 operates as a symmetrical avalanche diode, conducting equally in both directions when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1 ns), enabling effective suppression of fast-rising transients induced by inductive switching or ESD events.
Thermally, it exhibits RθJA = 100 °C/W and RθJL = 20 °C/W, supporting operation up to TJ = +150 °C. With 1.0 μA max reverse leakage at VWM and a temperature coefficient of VBR at +0.100 %/°C, it maintains predictable clamping behavior across industrial temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 33.3 V - maximum continuous reverse voltage before significant conduction begins; defines safe operating margin below clamping threshold |
| VBR (Breakdown) | 37.1–41.0 V at IT = 1 mA - precise avalanche onset range ensuring consistent turn-on during transients |
| VC (Clamping) | 53.9 V at IPPM = 11.1 A - peak voltage seen by protected circuit during 600 W 10/1000 μs surge; limits stress on downstream components |
| PPPM | 600 W - peak pulse power handling per JEDEC standard waveform; enables robust protection against IEC 61000-4-5 level 4 surges |
| ID (Leakage) | 1.0 μA max at VWM - negligible standby current that avoids loading sensitive signal lines or battery-powered circuits |
| TJ max | +150 °C - extended junction temperature rating supports use in under-hood automotive and high-ambient industrial environments |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 3.94 mm footprint and 2.20 mm height; compatible with automated pick-and-place |
Pinout & Package
SMB (DO-214AA) package: symmetrical two-terminal SMD case with no polarity marking for bidirectional operation; terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction - symmetric conduction path |
| Terminal 2 | Anode / Cathode (bidirectional) | Paired terminal completing the bidirectional avalanche path; enables clamping of positive and negative transients without external circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional 600 W surge rating | Enables single-device protection of AC-coupled or differential signal lines without polarity concerns |
| Glass-passivated junction | Ensures long-term stability of VBR and low leakage drift over temperature and lifetime |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow assembly without preconditioning or special handling |
| AEC-Q101 qualified variant available | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage exposure during surge events compared to competing TVS devices |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching interface IC. Use Value: Maintains signal integrity under 100 V/500 ms load dump events while adding <0.5 mm² PCB area and zero additional bias circuitry. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring transients and relay coil kickback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each isolated input channel, operating in parallel with optocoupler input stage. Use Value: Limits transient voltage to ≤53.9 V during 600 W surges, preventing latch-up or permanent damage to microcontroller GPIO pins. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Shielding Ethernet PHY magnetics and PoE controller inputs from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Secondary-level TVS placed after gas discharge tube (GDT) front-end to handle residual fast-rising energy. Use Value: Responds in <1 ns to clamp sub-microsecond transients missed by slower primary protectors, reducing failure rate in field-deployed equipment. |
Use Scenario: Suppressing switching noise and output overvoltage spikes in 5–24 V wall adapters powering USB-C PD and IoT devices. IC Role / Device Role / Timing Role: Final-stage transient suppressor on regulated DC output rail, downstream of DC-DC converter and LDO. Use Value: Prevents 53.9 V clamping voltage from exceeding absolute maximum ratings of connected USB peripherals or PMICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | 33 V VWM, 36.7–40.6 V VBR, 53.3 V VC at 11.3 A; same SMB package but lower clamping voltage | Better suited for 3.3 V or 5 V rail protection where tighter clamping margin is required | Select SMBJ33CA when protecting lower-voltage logic rails where 53.3 V clamping provides superior margin over 53.9 V |
| 1.5SMC33CA | 33 V VWM, 36.7–40.6 V VBR, 53.3 V VC at 28.3 A; higher 1500 W PPPM rating in larger SMC package | Used in high-energy surge environments (e.g., AC mains input) requiring greater single-pulse energy absorption | Choose 1.5SMC33CA only if system-level testing confirms need for >600 W pulse handling and PCB space allows SMC footprint |
Compared with SMBJ33CA and 1.5SMC33CA, the P6SMB39CA-E3/52 offers optimized balance of clamping performance, compact SMB footprint, and cost-efficiency for mid-range 24–48 V industrial and automotive signal line protection - without over-specifying power rating or sacrificing board space.
Availability
P6SMB39CA-E3/52 is available at Aetrix Electronics and suitable for industrial automation, automotive sensor modules, and telecom infrastructure requiring stable component supply, RoHS-compliant manufacturing, and traceable sourcing.
Supply support for P6SMB39CA-E3/52 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The P6SMB Series is engineered for board-level transient suppression in harsh environments, targeting applications demanding high surge robustness, low leakage, and AEC-Q101 compliance - especially in automotive, industrial, and telecom systems.
FAQ
What does the "CA" suffix indicate in P6SMB39CA-E3/52?
The "CA" suffix in P6SMB39CA-E3/52 denotes a bidirectional configuration, meaning the device functions identically in both polarities - essential for protecting AC-coupled lines, differential buses like CAN, or any circuit where voltage transients may swing positive or negative relative to ground. Unlike unidirectional variants (e.g., P6SMB39A), the P6SMB39CA-E3/52 has no cathode marking and conducts symmetrically.
Is P6SMB39CA-E3/52 RoHS-compliant and halogen-free?
Yes, the P6SMB39CA-E3/52 carries the "-E3" suffix, indicating it is RoHS-compliant and manufactured to commercial-grade specifications per Vishay's material categorization standards. It is not halogen-free; for halogen-free compliance, the "-M3" variant (e.g., P6SMB39CA-M3/52) must be selected - both meet JESD 201 Class 2 whisker resistance requirements.
What is the maximum clamping voltage of P6SMB39CA-E3/52 under surge conditions?
The maximum clamping voltage (VC) of P6SMB39CA-E3/52 is 53.9 V, measured at its rated peak pulse current (IPPM) of 11.1 A using the standardized 10/1000 μs waveform. This value represents the highest voltage the protected circuit will experience during a full-power transient event, making it critical for verifying compatibility with downstream component absolute maximum ratings.
Can P6SMB39CA-E3/52 be used in automotive applications?
While the base P6SMB39CA-E3/52 is commercial-grade, Vishay offers AEC-Q101 qualified versions under ordering codes such as P6SMB39CAHE3_B/H. These variants undergo rigorous stress testing for automotive use, including temperature cycling, humidity bias, and surge endurance - confirming suitability for engine control, body electronics, and ADAS sensor interfaces where reliability is mandated.
How does the thermal resistance of P6SMB39CA-E3/52 affect PCB layout?
The P6SMB39CA-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W, which assumes mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repeated surges, designers must provide adequate copper area and avoid excessive trace length or isolation - insufficient copper increases RθJA and risks thermal runaway during high-duty-cycle events.
P6SMB39CA-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 11.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB39CA-E3/52 FAQ
1.How can I place an order for P6SMB39CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB39CA-E3/52 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 P6SMB39CA-E3/52 reliable?
The price and inventory of P6SMB39CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB39CA-E3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB39CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB39CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB39CA-E3/52?
P6SMB39CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB39CA-E3/52 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 P6SMB39CA-E3/52?
For technical support, including P6SMB39CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB39CA-E3/52 requirements.
6.How does Aetrix verify that P6SMB39CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB39CA-E3/52 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 P6SMB39CA-E3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB39CA-E3/52?
All P6SMB39CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB39CA-E3/52, 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 P6SMB39CA-E3/52 part is unused and in its original packaging.
Return procedure for P6SMB39CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB39CA-E3/52 Tags
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