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Vishay General Semiconductor - Diodes Division P6SMB91A-E3/52
- Part No.:
- P6SMB91A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91A-E3/52.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB91A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 91 V breakdown voltage (VBR = 86.5–95.5 V at IT = 1.0 mA), 77.8 V maximum stand-off voltage (VWM), and clamps to 125 V at 4.8 A peak pulse current (IPPM) under 10/1000 μs waveform - used for protecting MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the P6SMB91A-E3/52 datasheet, P6SMB91A-E3/52 pinout, P6SMB91A-E3/52 application, or P6SMB91A-E3/52 equivalent, this device delivers verified 600 W peak pulse power handling, low incremental surge resistance, and AEC-Q101 qualification eligibility (via HE3 suffix variants), supporting robust overvoltage protection design in automotive and industrial environments.
Technical Context
The P6SMB91A-E3/52 operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to ESD and lightning-induced transients. Its clamping behavior is defined by a 125 V maximum clamping voltage (VC) at 4.8 A IPPM, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead).
It complies with J-STD-020 MSL Level 1 (peak reflow ≤260 °C), uses matte tin-plated leads solderable per J-STD-002, and supports repetitive 0.01% duty cycle pulses. Polarity is marked by cathode band; no marking on bidirectional variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1.0 mA test current - defines reliable avalanche initiation threshold for transient suppression |
| VWM | 77.8 V maximum - ensures stable reverse blocking below clamping onset, preventing leakage during normal operation |
| VC @ IPPM | 125 V at 4.8 A (10/1000 μs) - limits downstream voltage stress to safe levels for 3.3 V/5 V/12 V logic and power stages |
| PPPM | 600 W peak pulse power - sustains high-energy surges without failure under standardized lightning/inductive-switching waveforms |
| IFSM | 100 A peak forward surge (8.3 ms half-sine) - handles inrush or fault currents in DC power rail protection |
| TJ max | +150 °C - enables operation in under-hood automotive and high-temperature industrial enclosures |
| RθJA | 100 °C/W - informs thermal derating requirements when mounted on 0.2" × 0.2" copper pads |
Pinout & Package
SMB (DO-214AA) surface-mount package: low-profile, RoHS-compliant, UL 94 V-0 molded compound; cathode indicated by band on body; terminals are matte tin-plated for reliable solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to lower-potential side of protected line; conducts during forward surge or bias conditions |
| Cathode | Avalanche clamping terminal (unidirectional) | Connected to higher-potential side; initiates controlled breakdown when reverse voltage exceeds VWM |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables single-device protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12–48 V rails |
| Glass passivated junction | Ensures long-term stability and low leakage (<1 μA at VWM) across temperature and lifetime |
| MSL Level 1 moisture sensitivity | Allows direct placement into standard SMT reflow without baking, reducing manufacturing overhead |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD >15 kV contact discharge) |
| AEC-Q101 qualification path | Supports automotive-grade designs via HE3/HM3 suffix variants - validated for engine control, ADAS sensors, and infotainment power rails |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O against inductive kickback from relay coils and solenoid loads. IC Role / Device Role / Timing Role: Unidirectional TVS placed across MOSFET gate-source or supply input to clamp transients before they reach sensitive CMOS inputs. Use Value: Prevents latch-up or permanent damage to 3.3 V MCU GPIOs and 12 V logic-level MOSFETs during 100 V/10 A switching events. |
Use Scenario: Input protection for LIN bus transceivers and CAN node power supplies exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V battery rail suppresses 120 V/200 ms load dump spikes while maintaining <1 μA leakage at 13.5 V nominal. Use Value: Enables compliance with ISO 7637-2 Pulse 5a without additional series impedance or active regulation. |
| Telecom Power Supplies | Consumer Sensor Interfaces |
|
Use Scenario: Secondary-side overvoltage suppression on 48 V PoE-powered equipment after DC-DC conversion. IC Role / Device Role / Timing Role: Clamping device on 5 V/3.3 V output rails, triggered only during fault conditions exceeding 77.8 V standoff. Use Value: Limits transient propagation to Ethernet PHYs and PMICs during AC line surges or hot-swap events. |
Use Scenario: ESD protection for analog outputs of temperature/humidity sensors connected to microcontrollers via 20 cm PCB traces. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 100 pF at 0 V) placed at connector entry point to shunt ±8 kV HBM discharges. Use Value: Maintains signal integrity on 10-bit ADC inputs while surviving repeated ESD events without parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90A (Microchip) | Same SMB package, 90 V VBR (85.5–94.5 V), 121 V VC @ 4.9 A, 400 W PPPM | Limited to 400 W pulse rating - insufficient for IEC 61000-4-5 Level 4; suitable for lower-energy consumer interfaces | Select when cost sensitivity outweighs 600 W requirement and layout space allows minor derating margin |
| 1.5SMC91A (ON Semiconductor) | SAME VBR/VWM/VC specs, identical 600 W rating, but in larger SMC (DO-214AB) package (2.79 mm height vs. SMB's 2.2 mm) | Requires PCB footprint revision; better thermal dissipation (RθJA = 60 °C/W) but incompatible with ultra-low-profile assemblies | Choose only if thermal budget is constrained and board height permits 0.6 mm taller component |
Compared with SMAJ90A and 1.5SMC91A, the P6SMB91A-E3/52 uniquely balances 600 W surge capability, SMB footprint compatibility, and 77.8 V standoff in a single commercial-grade RoHS-compliant device - making it optimal for space-constrained industrial and automotive modules requiring full IEC/ISO compliance without redesign.
Availability
P6SMB91A-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supplies requiring stable component supply, consistent lead-time performance, and traceable sourcing for production ramp.
Supply support for P6SMB91A-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, power efficiency, and automotive-grade validation.
The P6SMB Series targets high-reliability transient suppression in space-constrained applications, delivering 600 W pulse capability in the compact SMB package for use in automotive, industrial, and telecom infrastructure where board area and thermal profile are critical.
FAQ
What is the maximum clamping voltage of the P6SMB91A-E3/52 under standard test conditions?
The P6SMB91A-E3/52 has a maximum clamping voltage (VC) of 125 V when subjected to a 10/1000 μs waveform at 4.8 A peak pulse current (IPPM). This value is measured per JEDEC standards and reflects the upper limit of voltage seen by downstream circuitry during transient events. The P6SMB91A-E3/52 maintains this clamping performance across its specified operating temperature range of -65 °C to +150 °C.
Is the P6SMB91A-E3/52 suitable for automotive applications?
The P6SMB91A-E3/52 itself is commercial-grade (E3 suffix), but Vishay offers AEC-Q101 qualified versions under HE3 and HM3 suffixes (e.g., P6SMB91AHE3_B). These variants undergo rigorous stress testing for automotive use, including temperature cycling, humidity bias, and mechanical shock. While the P6SMB91A-E3/52 meets key electrical specs required in automotive subsystems, full qualification requires selecting the HE3/HM3 variant - the P6SMB91A-E3/52 serves as the baseline for those qualified derivatives.
What does the "-E3/52" suffix indicate in P6SMB91A-E3/52?
The "-E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. The "/52" specifies packaging: 7-inch diameter plastic tape-and-reel containing 750 units, optimized for automated SMT placement. This ordering code ensures consistency in plating, environmental compliance, and assembly-line compatibility - the P6SMB91A-E3/52 is not compatible with bulk or cut-tape delivery modes unless explicitly reordered.
How does the P6SMB91A-E3/52 compare to bidirectional TVS diodes like P6SMB91CA?
The P6SMB91A-E3/52 is unidirectional and features a cathode band for polarity identification; it blocks forward current until ~0.7 V and clamps only in reverse. In contrast, P6SMB91CA is bidirectional with symmetrical clamping in both directions and no polarity marking. The P6SMB91A-E3/52 is preferred for DC power rail protection where polarity is fixed, offering tighter VWM tolerance (77.8 V vs. 77.8 V for CA variant) and lower leakage at rated voltage - critical for battery-backed systems.
What is the thermal resistance and mounting requirement for optimal performance of the P6SMB91A-E3/52?
The P6SMB91A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain reliability under repetitive surge conditions, PCB layout must replicate this pad size and ensure uninterrupted thermal vias to inner ground planes. Derating curves in the datasheet show that above 25 °C ambient, peak pulse power must be reduced - the P6SMB91A-E3/52 achieves full 600 W rating only at TA ≤ 25 °C with proper copper area.
P6SMB91A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 77.8V
- Voltage - Breakdown (Min):
- 86.5V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 4.8A
- 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)
P6SMB91A-E3/52 FAQ
1.How can I place an order for P6SMB91A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91A-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 P6SMB91A-E3/52 reliable?
The price and inventory of P6SMB91A-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 P6SMB91A-E3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB91A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91A-E3/52?
P6SMB91A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91A-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 P6SMB91A-E3/52?
For technical support, including P6SMB91A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91A-E3/52 requirements.
6.How does Aetrix verify that P6SMB91A-E3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB91A-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 P6SMB91A-E3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB91A-E3/52?
All P6SMB91A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91A-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 P6SMB91A-E3/52 part is unused and in its original packaging.
Return procedure for P6SMB91A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB91A-E3/52 Tags
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