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Vishay General Semiconductor - Diodes Division P6SMB51CAHE3/5B
- Part No.:
- P6SMB51CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51CAHE3/5B.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,767
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Product details
Overview
P6SMB51CAHE3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for clamping voltage transients on signal and power lines. It features a 51 V breakdown voltage (VBR min/max = 48.5–53.6 V at 1 mA), 43.6 V stand-off voltage (VWM), 70.1 V maximum clamping voltage (VC) at 8.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and automotive ECUs against ESD and inductive switching surges.
For engineers reviewing the P6SMB51CAHE3/5B datasheet, P6SMB51CAHE3/5B pinout, P6SMB51CAHE3/5B application, or P6SMB51CAHE3/5B equivalent, this part serves as a RoHS-compliant, AEC-Q101-qualified bidirectional TVS in SMB (DO-214AA) package, optimized for high-reliability automotive and industrial surge protection where low clamping voltage, fast response (<1 ns), and stable thermal performance up to +150 °C junction temperature are required.
Technical Context
The P6SMB51CAHE3/5B operates as a bidirectional avalanche diode, symmetrically clamping transient voltages above ±43.6 V in both polarities without polarity marking. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and low incremental surge resistance, enabling consistent clamping under repetitive 10/1000 µs pulses at 0.01% duty cycle.
Thermally, it exhibits RθJA = 100 °C/W and RθJL = 20 °C/W, supporting operation from –65 °C to +150 °C. The device meets J-STD-020 MSL Level 1 and is qualified to AEC-Q101, confirming suitability for automotive under-hood and body-control module applications requiring long-term reliability under thermal cycling and humidity exposure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 48.5–53.6 V at 1 mA test current - defines precise voltage threshold where avalanche conduction begins in both directions |
| Stand-off Voltage VWM | 43.6 V - maximum continuous reverse voltage before significant leakage; sets safe operating margin below clamping onset |
| Clamping Voltage VC | 70.1 V at 8.6 A IPPM - actual voltage seen by protected circuit during worst-case 10/1000 µs transient |
| Peak Pulse Power PPPM | 600 W - energy-handling capability for standardized surge events; enables protection against IEC 61000-4-5 Level 3 surges |
| Operating Temperature Range | –65 °C to +150 °C - supports under-hood automotive, industrial motor drives, and outdoor telecom equipment |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HAST, and mechanical shock per AEC specification |
| Package | SMB (DO-214AA) - surface-mount footprint with 5.0 mm × 5.0 mm copper pad requirement; compatible with automated reflow assembly |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1, 260 °C peak reflow profile. Bidirectional construction has no polarity marking; terminals are symmetrical anode/cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient conduction path | Either terminal functions identically as input/output; no cathode band marking required for bidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against lightning-induced surges and inductive kickback in 12 V/24 V automotive systems |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage stress on downstream ICs such as CAN transceivers or microcontroller I/O pins |
| Glass-passivated junction | Ensures stable leakage current (<1 µA at VWM) and long-term parameter consistency across temperature and life cycles |
| AEC-Q101 qualification (HE3 suffix) | Confirms compliance with automotive stress tests including HTOL, TC, and uHAST - suitable for ASIL-B system nodes |
| MSL Level 1, 260 °C reflow compatible | Eliminates moisture sensitivity concerns and allows standard SMT assembly without baking preconditioning |
Applications
| Automotive Body Control Module | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting LIN bus and switch inputs in door modules exposed to load dump and battery reversal transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching MCU GPIO or LIN transceiver. Use Value: Clamps 43.6 V stand-off to 70.1 V within nanoseconds, preventing latch-up or gate oxide damage in 5 V-tolerant automotive MCUs. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in PLC I/O modules subjected to field wiring surges. IC Role / Device Role / Timing Role: Parallel-connected TVS across sensor output line and ground to clamp induced transients from nearby motor contactors. Use Value: Limits voltage excursion to ≤70.1 V during 600 W surges, preserving 12-bit ADC accuracy and avoiding signal corruption in 4–20 mA loops. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive Board |
|
Use Scenario: Secondary-side DC input protection in PoE-powered network switches facing Ethernet cable ESD and surge coupling. IC Role / Device Role / Timing Role: Bidirectional TVS on 48 V DC rail to absorb common-mode transients coupled from Ethernet magnetics or AC mains coupling. Use Value: Withstands repetitive 10/1000 µs surges at 0.01% duty cycle while maintaining <1 µA leakage at 43.6 V, ensuring no standby power penalty. |
Use Scenario: Protecting half-bridge gate drivers in washing machine motor inverters from shoot-through-inducing voltage spikes during PWM switching. IC Role / Device Role / Timing Role: Localized TVS across high-side and low-side driver supply rails to suppress Miller-induced transients on bootstrap nodes. Use Value: Fast <1 ns response and low dynamic impedance limit overshoot to 70.1 V, preventing false triggering or desaturation faults in 600 V IGBTs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51CA | Same 51 V VBR, but 400 W PPPM (vs. 600 W); SMA package (smaller footprint, higher RθJA = 140 °C/W) | Limited to lower-energy surges; less suitable for automotive load dump where 600 W is specified | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 ±15 kV contact discharge only |
| 1.5KE51CA | Through-hole DO-201 package; identical 51 V VBR, 600 W PPPM, but slower response due to higher parasitic inductance | Not suitable for high-frequency signal lines or dense SMT layouts; requires manual or wave soldering | Choose only for legacy through-hole designs or prototyping where rework tolerance outweighs SMT efficiency |
Compared with SMAJ51CA and 1.5KE51CA, the P6SMB51CAHE3/5B delivers superior thermal performance (RθJL = 20 °C/W), AEC-Q101 qualification, and SMB footprint compatibility with automated placement - making it the preferred choice for new automotive and industrial SMT designs requiring validated reliability and full 600 W surge handling.
Availability
P6SMB51CAHE3/5B is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, telecom power inputs, and consumer appliance motor control requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for P6SMB51CAHE3/5B 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 high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 validation are mandatory design requirements.
FAQ
What does the "CA" suffix mean in P6SMB51CAHE3/5B?
The "CA" suffix in P6SMB51CAHE3/5B denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with no cathode marking required. This distinguishes it from unidirectional variants (e.g., P6SMB51A), which have a marked cathode band and conduct only in reverse bias. The P6SMB51CAHE3/5B is therefore ideal for AC-coupled or floating signal lines where polarity reversal may occur.
Is P6SMB51CAHE3/5B suitable for automotive applications?
Yes, P6SMB51CAHE3/5B is AEC-Q101 qualified (indicated by the "HE3" suffix), having passed rigorous stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing. It is explicitly intended for automotive use cases such as body control modules, lighting drivers, and sensor interfaces where sustained operation from –40 °C to +125 °C ambient and immunity to load dump transients are required.
What is the maximum clamping voltage of P6SMB51CAHE3/5B under surge conditions?
The maximum clamping voltage (VC) of P6SMB51CAHE3/5B is 70.1 V at 8.6 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value represents the highest voltage imposed on the protected circuit during a standardized surge event and is critical for ensuring downstream components - such as 5 V or 3.3 V logic ICs - remain within absolute maximum ratings.
How does the HE3 suffix differ from E3 or M3 in P6SMB51CAHE3/5B?
The "HE3" suffix in P6SMB51CAHE3/5B indicates RoHS-compliant construction *and* AEC-Q101 qualification, whereas "E3" denotes RoHS-compliant commercial grade only, and "M3" adds halogen-free compliance. Only HE3 and HM3 variants meet automotive reliability standards; HE3 is the standard choice for automotive-grade P6SMB51CAHE3/5B in 13" tape-and-reel packaging (5B).
What PCB layout guidance applies to P6SMB51CAHE3/5B for optimal thermal performance?
For optimal thermal performance, P6SMB51CAHE3/5B must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. This pad area reduces thermal resistance (RθJA = 100 °C/W) and prevents localized overheating during repetitive 600 W surges. Avoid narrow traces or thermal reliefs on TVS connections to maintain low-impedance heat dissipation paths to internal ground planes.
P6SMB51CAHE3/5B 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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB51CAHE3/5B FAQ
1.How can I place an order for P6SMB51CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51CAHE3/5B 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 P6SMB51CAHE3/5B reliable?
The price and inventory of P6SMB51CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB51CAHE3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB51CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51CAHE3/5B?
P6SMB51CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51CAHE3/5B 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 P6SMB51CAHE3/5B?
For technical support, including P6SMB51CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51CAHE3/5B requirements.
6.How does Aetrix verify that P6SMB51CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB51CAHE3/5B 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 P6SMB51CAHE3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB51CAHE3/5B?
All P6SMB51CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51CAHE3/5B, 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 P6SMB51CAHE3/5B part is unused and in its original packaging.
Return procedure for P6SMB51CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51CAHE3/5B Tags
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