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Vishay General Semiconductor - Diodes Division P6SMB91AHE3/5B
- Part No.:
- P6SMB91AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91AHE3/5B.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,469
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Product details
Overview
P6SMB91AHE3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the 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 125 V maximum clamping voltage (VC) at 4.8 A peak pulse current (IPPM), delivering 600 W peak pulse power with a 10/1000 μs waveform - ideal for protecting MOSFETs and ICs in industrial power supplies.
For engineers reviewing the P6SMB91AHE3/5B datasheet, P6SMB91AHE3/5B pinout, P6SMB91AHE3/5B application, or P6SMB91AHE3/5B equivalent, this AEC-Q101 qualified, RoHS-compliant TVS diode supports automotive-grade reliability, offers low incremental surge resistance and fast response time, and is optimized for automated placement on PCBs requiring robust ESD and surge immunity per IEC 61000-4-2/4-5.
Technical Context
The P6SMB91AHE3/5B operates as a unidirectional avalanche-clamping device, leveraging glass-passivated junction technology to achieve stable reverse breakdown behavior under transient overvoltage events. Its thermal resistance (RθJA = 100 °C/W) and junction temperature limit (TJ = –65 to +150 °C) support operation in high-ambient environments when mounted on standard 5.0 mm × 5.0 mm copper pads.
It delivers 600 W peak pulse power with a 10/1000 μs waveform at TA = 25 °C, derating linearly above that temperature per Figure 2. The device exhibits a low 0.106 %/°C temperature coefficient of VBR, ensuring predictable clamping across operating temperature ranges, and meets J-STD-020 MSL Level 1 with peak reflow at 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at IT = 1.0 mA - defines reliable avalanche initiation range for consistent clamping onset |
| VWM | 77.8 V - maximum continuous reverse working voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 125 V at 4.8 A - clamped voltage during 600 W transient, limiting stress on downstream components |
| IPPM | 4.8 A - peak pulse current capability with 10/1000 μs waveform, enabling protection against IEC 61000-4-5 surges |
| PPPM | 600 W - peak pulse power rating, validated for repetitive 0.01 % duty cycle transients |
| TJ max. | +150 °C - maximum junction temperature, supporting operation in under-hood automotive and industrial enclosures |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and matte tin-plated leads |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with cathode band marking; 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 |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; enables forward conduction during fault conditions |
| Cathode | Reverse-biased clamping terminal | Marked with band; connected to higher-potential side; conducts avalanche current during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics, with extended temperature cycling and humidity testing |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress without parameter drift |
| 600 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV surge) protection on 12 V/24 V DC rails without external heat sinking |
| MSL Level 1 moisture sensitivity | Enables direct placement into reflow ovens without baking; compatible with standard SMT assembly processes |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs in automotive ADAS camera modules against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy before it reaches PMIC and image sensor ICs. Use Value: Limits voltage to ≤125 V during 100 A/10 ms load dump events, preventing permanent damage to 3.3 V logic interfaces. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to inductive switching noise from solenoids and relays. IC Role / Device Role / Timing Role: Fast-response voltage clamp placed at connector entry point to shunt surge energy to ground. Use Value: Clamps 1 kV/500 A surges within <1 ns, maintaining signal integrity and avoiding false triggering of optocoupled inputs. |
| DC-DC Converter Output Protection | Telecom Interface Line Protection |
|
Use Scenario: Shielding secondary-side outputs of isolated 48 V-to-12 V DC-DC converters in telecom rectifiers from back-fed transients. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between output rail and ground to absorb reflected energy from cable disconnection events. Use Value: Withstands 600 W pulses without degradation, preserving regulation accuracy and eliminating need for redundant filtering stages. |
Use Scenario: Protecting RS-485 transceiver pins in base station remote radio units subjected to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level transient suppressor on differential bus lines, coordinated with secondary GDT or polymer PTC. Use Value: Provides sub-100 ns response and 125 V clamping to keep transceiver common-mode voltage within ±12 V absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ90A | Same SMB package, VBR = 100–111 V, VC = 146 V at 4.1 A - higher clamping voltage and lower IPPM | Less effective for tight-margin 12 V systems where 125 V clamping is critical; better suited for 48 V rails | Select P6SMB91AHE3/5B when clamping headroom below 125 V is required for 24 V nominal circuits. |
| 1.5SMC91A | Higher-power SMC package (1500 W), same VBR/VC specs but larger footprint (7.11 mm × 6.22 mm) and 2× thermal mass | Used where sustained surge repetition or higher single-event energy demands greater thermal capacity | Choose P6SMB91AHE3/5B for space-constrained layouts where 600 W suffices and SMB footprint is mandatory. |
Compared with SMAJ90A and 1.5SMC91A, the P6SMB91AHE3/5B uniquely balances AEC-Q101 qualification, SMB footprint compatibility, and precise 125 V clamping - making it optimal for automotive and industrial designs where board area, reliability certification, and voltage margin are jointly constrained.
Availability
P6SMB91AHE3/5B is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, and telecom power supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P6SMB91AHE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure, engineered for automated SMT assembly and compliance with AEC-Q101 and RoHS requirements.
FAQ
What is the maximum clamping voltage of the P6SMB91AHE3/5B under rated surge conditions?
The P6SMB91AHE3/5B has a maximum clamping voltage (VC) of 125 V at 4.8 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per standard test conditions and ensures downstream components see no more than 125 V during transient events. The P6SMB91AHE3/5B maintains this clamping performance across its full operating temperature range and after repeated surge exposure due to its glass-passivated junction construction.
Is the P6SMB91AHE3/5B qualified for automotive applications?
Yes, the P6SMB91AHE3/5B is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number. This qualification covers stress tests including temperature cycling, humidity bias, mechanical shock, and accelerated life testing - confirming suitability for under-hood and chassis-mounted automotive electronics. The P6SMB91AHE3/5B is specifically intended for use in engine control units, body control modules, and ADAS subsystems where reliability under harsh environmental conditions is mandatory.
What does the "5B" suffix indicate in P6SMB91AHE3/5B?
Within the Vishay ordering system, the "5B" suffix denotes a 13-inch diameter plastic tape-and-reel packaging format containing 3200 units per reel. This contrasts with "52", which indicates a 7-inch reel holding 750 units. The "5B" configuration supports high-volume SMT production lines requiring longer uninterrupted placement runs and reduced changeover frequency. The P6SMB91AHE3/5B retains identical electrical and thermal specifications regardless of reel size.
How does the P6SMB91AHE3/5B compare to bidirectional TVS diodes like P6SMB91CA?
The P6SMB91AHE3/5B is unidirectional and features a cathode band marking, while P6SMB91CA is bidirectional with no polarity marking and symmetric clamping in both directions. The P6SMB91AHE3/5B provides lower leakage (<1.0 μA at 77.8 V) and is preferred for DC power rail protection where polarity is fixed. In contrast, P6SMB91CA suits AC-coupled signal lines or differential buses. Both share identical VBR, VC, and PPPM ratings, but only the P6SMB91AHE3/5B carries AEC-Q101 qualification in the HE3 variant.
What is the thermal resistance of the P6SMB91AHE3/5B, and how does it affect layout design?
The P6SMB91AHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 5.0 mm × 5.0 mm copper pads per terminal. This value assumes standard FR-4 PCB with no internal copper planes. To maintain TJ ≤ 150 °C under continuous 5.0 W dissipation, designers must ensure adequate copper area and avoid excessive ambient temperatures. The P6SMB91AHE3/5B's RθJA directly informs pad sizing and thermal via placement in high-power surge scenarios.
P6SMB91AHE3/5B 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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB91AHE3/5B FAQ
1.How can I place an order for P6SMB91AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91AHE3/5B 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 P6SMB91AHE3/5B reliable?
The price and inventory of P6SMB91AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB91AHE3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB91AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91AHE3/5B?
P6SMB91AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91AHE3/5B 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 P6SMB91AHE3/5B?
For technical support, including P6SMB91AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91AHE3/5B requirements.
6.How does Aetrix verify that P6SMB91AHE3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB91AHE3/5B 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 P6SMB91AHE3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB91AHE3/5B?
All P6SMB91AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91AHE3/5B, 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 P6SMB91AHE3/5B part is unused and in its original packaging.
Return procedure for P6SMB91AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB91AHE3/5B Tags
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