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Vishay General Semiconductor - Diodes Division P6SMB91AHE3_B/I
- Part No.:
- P6SMB91AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91AHE3_B/I.pdf
- Description:
- 600W,91V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,817
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Product details
Overview
P6SMB91AHE3_B/I 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 77.8 V stand-off voltage (VWM), 86.5–95.5 V breakdown voltage (VBR) at 1 mA, 125 V maximum clamping voltage (VC) at 4.8 A peak pulse current, and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power rails.
For engineers reviewing the P6SMB91AHE3_B/I datasheet, P6SMB91AHE3_B/I pinout, P6SMB91AHE3_B/I application, or P6SMB91AHE3_B/I equivalent, this AEC-Q101 qualified TVS diode offers verified transient suppression performance, RoHS-compliant matte tin plating, MSL Level 1 moisture sensitivity, and validated clamping behavior under repetitive surge conditions per IEC 61000-4-5.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to clamp transient overvoltages above its VWM threshold while maintaining low leakage (<1 μA at 77.8 V). Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), enabling protection of sensitive downstream circuitry during ESD, load dump, or inductive switching events.
The device is rated for 150 °C maximum junction temperature, exhibits +0.106 %/°C temperature coefficient of VBR, and delivers 600 W peak pulse power dissipation when mounted on 5.0 mm × 5.0 mm copper pads - confirming suitability for high-reliability automotive power supply inputs and industrial control I/O protection where thermal derating and long-term stability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 77.8 V - Maximum continuous reverse operating voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 86.5–95.5 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients without premature triggering. |
| VC (Clamping) | 125 V at 4.8 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; enables robust design margin for 75 V nominal systems. |
| PPPM | 600 W - Peak pulse power handling capability under standardized 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 compliance. |
| IPPM | 4.8 A - Peak pulse current corresponding to VC; determines minimum trace width and PCB layout requirements for surge path. |
| TJ max. | 150 °C - Maximum junction temperature rating; allows operation in under-hood automotive environments and sealed industrial enclosures. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 2.20 mm height and 3.94 mm length; compatible with automated pick-and-place and reflow profiles up to 260 °C peak. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity indicated by cathode band. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, with MSL Level 1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during positive transients on cathode side. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 75 V rail); conducts avalanche current to anode when voltage exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity testing, and surge endurance - required for engine control, ADAS, and body electronics. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage over lifetime; eliminates risk of parametric drift due to environmental contamination or bias stress. |
| 600 W peak pulse power | Supports single-event surge currents up to 4.8 A (10/1000 μs), meeting ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 requirements for 24 V systems. |
| MSL Level 1 rating | Enables standard SMT reflow without baking; eliminates moisture-related popcorning risk during assembly of high-volume automotive PCBs. |
| RoHS-compliant matte tin plating | Guarantees solderability and intermetallic formation control across lead-free reflow profiles; meets IPC-J-STD-006B Class 2 whisker resistance. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs against load dump transients up to ±120 V per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between power input and DC/DC converter input stage. Use Value: Limits voltage seen by downstream regulator to ≤125 V during 100 ms load dump events, preventing overvoltage failure of LDOs and microcontrollers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on 0–5 V or 4–20 mA signal lines connected to PLC analog inputs. Use Value: Clamps 8 kV contact ESD pulses to <125 V within <1 ns, preserving ADC accuracy and avoiding latch-up in signal conditioning op-amps. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Protection |
Use Scenario: Safeguarding PoE-powered Ethernet switch ports against lightning-induced surges on data pairs and auxiliary power lines. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V DC input rail upstream of isolation transformer and DC/DC controller. Use Value: Absorbs 600 W surge energy without degradation, maintaining system uptime during outdoor installation exposure to induced transients. |
Use Scenario: Preventing damage to AC-DC adapter primary-side rectifiers and controllers during mains overvoltage events (e.g., neutral loss). IC Role / Device Role / Timing Role: Secondary-side TVS on 12 V output rail protecting USB-C PD negotiation ICs and voltage supervisors. Use Value: Clamps 10/1000 μs surges to ≤125 V while drawing <1 μA at 77.8 V, eliminating standby power penalty and ensuring UL 62368-1 compliance. |
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-E3/5B | Same SMB package, 90 V VBR min (85.5–94.5 V), 121 V VC at 4.9 A; lower temperature coefficient (+0.097 %/°C); non-AEC-Q101. | Lacks automotive qualification; suitable for commercial/industrial use only; slightly tighter VBR tolerance but no guaranteed MSL Level 1 or whisker resistance. | Select when AEC-Q101 is not required and tighter VBR spec is prioritized over automotive reliability validation. |
| 1.5SMC91A | Same VWM/VBR/VC specs, but in larger SMC (DO-214AB) package; 1000 W PPPM; higher thermal mass; not AEC-Q101 qualified. | Requires larger PCB footprint and different pad layout; better suited for high-energy surges where 600 W is marginal; incompatible with space-constrained automotive modules. | Choose only if surge energy exceeds 600 W capability and board area permits SMC footprint; not drop-in compatible with P6SMB91AHE3_B/I layout. |
Compared with SMAJ90A-E3/5B and 1.5SMC91A, the P6SMB91AHE3_B/I uniquely combines AEC-Q101 qualification, MSL Level 1, and verified 600 W clamping performance in the compact SMB outline - making it the only option qualified for production automotive electronics requiring both reliability and space efficiency.
Availability
P6SMB91AHE3_B/I is available at Aetrix Electronics and suitable for automotive ECU power protection, industrial sensor interface hardening, and telecom line card surge suppression requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for P6SMB91AHE3_B/I 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and automotive-grade qualification.
The P6SMB Series was developed specifically for high-reliability transient suppression in automotive and industrial environments, delivering consistent clamping performance, AEC-Q101 validation, and optimized thermal behavior in surface-mount packages.
FAQ
What is the maximum clamping voltage of the P6SMB91AHE3_B/I under a 10/1000 μs surge?
The P6SMB91AHE3_B/I has a maximum clamping voltage (VC) of 125 V at 4.8 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions defined in the Vishay datasheet (Document Number: 88370), and represents the highest voltage imposed on the protected circuit during worst-case transient events - critical for validating design margins in 75 V nominal systems.
Is the P6SMB91AHE3_B/I qualified for automotive applications?
Yes, the P6SMB91AHE3_B/I is AEC-Q101 qualified, as confirmed by the "HE3" and "_B" suffixes in its ordering code. This qualification covers stress tests including temperature cycling, high-temperature operating life, and surge endurance - making the P6SMB91AHE3_B/I suitable for engine control units, ADAS sensors, and body electronics where automotive reliability standards apply.
What is the standoff voltage (VWM) of the P6SMB91AHE3_B/I, and why does it matter?
The P6SMB91AHE3_B/I has a standoff voltage (VWM) of 77.8 V, meaning it remains non-conductive up to this reverse voltage level. This parameter ensures the device does not interfere with normal circuit operation while providing a safety margin below its 86.5–95.5 V breakdown range - essential for protecting 75 V power rails without false triggering during ripple or startup overshoot.
Does the P6SMB91AHE3_B/I have moisture sensitivity limitations for PCB assembly?
No - the P6SMB91AHE3_B/I is rated MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This means it can be processed using standard lead-free reflow profiles without pre-baking, eliminating moisture-related defects like popcorn cracking and supporting high-yield automated assembly in automotive and industrial manufacturing lines.
How does the P6SMB91AHE3_B/I compare to bidirectional TVS diodes like P6SMB91CA?
The P6SMB91AHE3_B/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., 75 V supply rail), offering lower leakage and sharper clamping than bidirectional variants. In contrast, P6SMB91CA protects AC or polarity-agnostic signals but exhibits higher leakage and symmetric clamping - so the P6SMB91AHE3_B/I is preferred when protecting grounded-positive power paths with strict leakage budgets.
P6SMB91AHE3_B/I 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB91AHE3_B/I FAQ
1.How can I place an order for P6SMB91AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91AHE3_B/I 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 P6SMB91AHE3_B/I reliable?
The price and inventory of P6SMB91AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB91AHE3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB91AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91AHE3_B/I?
P6SMB91AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91AHE3_B/I 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 P6SMB91AHE3_B/I?
For technical support, including P6SMB91AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91AHE3_B/I requirements.
6.How does Aetrix verify that P6SMB91AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB91AHE3_B/I 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 P6SMB91AHE3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB91AHE3_B/I?
All P6SMB91AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91AHE3_B/I, 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 P6SMB91AHE3_B/I part is unused and in its original packaging.
Return procedure for P6SMB91AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB91AHE3_B/I Tags
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