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Vishay General Semiconductor - Diodes Division P6SMB91A-E3/5B
- Part No.:
- P6SMB91A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91A-E3/5B.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB91A-E3/5B 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 stand-off voltage (VWM), and clamps to 125 V at 4.8 A peak pulse current (IPPM) under 10/1000 µs waveform - protecting MOSFETs and ICs in industrial power supplies.
For engineers reviewing the P6SMB91A-E3/5B datasheet, P6SMB91A-E3/5B pinout, P6SMB91A-E3/5B application, or P6SMB91A-E3/5B equivalent, key selection criteria include its 600 W peak pulse power rating, unidirectional polarity with cathode band marking, RoHS-compliant matte tin plating, MSL Level 1 moisture sensitivity, and suitability for automated SMT assembly in automotive-grade and industrial surge protection circuits.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below VWM = 77.8 V and rapidly transitions to low-impedance conduction above VBR = 86.5–95.5 V, limiting transient overvoltage to ≤125 V at 4.8 A. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns).
Thermally, it supports operation from −65 °C to +150 °C with RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling reliable performance on standard 0.2" × 0.2" copper pads. The E3 suffix confirms RoHS compliance and commercial-grade qualification per JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at 1.0 mA test current - defines precise clamping onset threshold for design margining |
| VWM | 77.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 125 V at 4.8 A (10/1000 µs) - actual clamped voltage seen by protected circuit during surge |
| PPPM | 600 W - peak transient energy absorption capability without failure under standardized waveform |
| IFSM | 100 A (8.3 ms half-sine) - surge current handling for unidirectional forward conduction events |
| TJ max | +150 °C - maximum junction temperature enabling use in high-ambient industrial environments |
| Package | SMB (DO-214AA) - industry-standard 2-pin surface-mount outline with 0.220" body length and cathode band marking |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode indicated by a band on the case. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); terminals are matte tin-plated for J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance reference; forms clamping loop with cathode |
| Cathode | Reverse-biased terminal / transient input node | Connected to line being protected; conducts when transient exceeds VBR; marked by band |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without derating on standard PCB pads |
| Glass passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1 µA), and long-term reliability under thermal cycling |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow without preconditioning - eliminates manufacturing delays and cost |
| RoHS-compliant E3 suffix | Meets EU Directive 2011/65/EU and JESD201 Class 2 whisker resistance for high-reliability production |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD, inductive kickback) |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Suppresses load-dump and alternator ripple transients on 24 V DC input rails of programmable logic controllers and motor drives. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp spikes before they reach DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤125 V, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V logic and power MOSFETs. |
Use Scenario: Protects LIN bus transceivers and sensor interface ICs from ISO 7637-2 pulse 1/2a/5a transients in vehicle door modules and lighting control units. IC Role / Device Role / Timing Role: Standoff-rated TVS on LIN data line and VBAT supply, leveraging 77.8 V VWM to tolerate normal battery fluctuations while blocking surges. Use Value: Maintains signal integrity during 100 V/50 ms load dump events without compromising low-power sleep-mode leakage (<1 µA). |
| Telecom AC/DC Adapter Input Stage | Consumer Appliance Motor Drive Board |
|
Use Scenario: Shields primary-side controller ICs and optocouplers from lightning-induced surges entering via AC mains input in Class II isolated adapters. IC Role / Device Role / Timing Role: First-line clamping device across bridge rectifier output, coordinated with MOVs and fuses for staged overvoltage defense. Use Value: Absorbs 600 W peak energy without degradation, ensuring >100,000 surge cycles per IEC 61000-4-5 compliance testing. |
Use Scenario: Guards gate drivers and current-sense amplifiers from inductive kickback generated by brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to motor terminals and H-bridge FETs to minimize loop inductance and suppress <100 ns spikes. Use Value: Clamps sub-microsecond transients to 125 V within 1 ns, preventing false triggering or overvoltage damage to 5 V analog front-ends. |
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 = 90–100 V, VC = 129 V @ 4.7 A, 400 W PPPM | Lower peak power rating reduces margin for repetitive surges; suitable only for light-duty consumer applications | Select SMAJ90A only if system-level surge testing requires lower clamping voltage tolerance and cost is prioritized over lifetime reliability |
| 1.5SMC91A | Same VBR/VC, but SMC (DO-214AB) package - 20 % larger footprint and higher RθJA (120 °C/W) | Requires PCB layout change; less compatible with dense industrial layouts optimized for SMB | Choose 1.5SMC91A only when higher thermal mass is needed for sustained surge duty cycles exceeding 0.01 % |
Compared with SMAJ90A and 1.5SMC91A, P6SMB91A-E3/5B delivers superior 600 W surge capacity in the compact SMB outline, tighter VBR tolerance (±5 % vs ±10 %), and verified MSL Level 1 reflow compatibility - making it optimal for high-volume, space-constrained industrial and automotive designs requiring long-term surge endurance.
Availability
P6SMB91A-E3/5B is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom AC/DC adapters, and consumer appliance motor control systems requiring stable component supply, full traceability, and RoHS-compliant sourcing.
Supply support for P6SMB91A-E3/5B 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific performance.
The P6SMB Series targets high-energy transient suppression in harsh environments, engineered for automotive (AEC-Q101 qualified variants), industrial, and telecom infrastructure where consistent clamping behavior and long-term stability under thermal stress are critical.
FAQ
What is the maximum clamping voltage of the P6SMB91A-E3/5B under a 10/1000 µs surge?
The P6SMB91A-E3/5B clamps to a maximum of 125 V when subjected to its rated peak pulse current of 4.8 A under the standardized 10/1000 µs waveform. This value is measured at the device terminals with specified mounting conditions (0.2" × 0.2" copper pads) and represents the upper limit of voltage imposed on the protected circuit during transient events. Designers must verify layout parasitics do not elevate actual clamping beyond this specification.
Is the P6SMB91A-E3/5B suitable for automotive applications?
The P6SMB91A-E3/5B itself is RoHS-compliant and commercial-grade (E3 suffix), but not AEC-Q101 qualified. For automotive use, Vishay offers the P6SMB91AHE3_B variant (with "HE3" and "_B" suffixes), which adds AEC-Q101 qualification. Engineers specifying P6SMB91A-E3/5B for automotive systems must perform full qualification per their OEM's requirements, as the base P6SMB91A-E3/5B lacks automotive-grade stress testing documentation.
What does the "/5B" in P6SMB91A-E3/5B indicate?
The "/5B" suffix in P6SMB91A-E3/5B specifies the packaging configuration: 13-inch diameter plastic tape and reel containing 3200 units. This contrasts with "/52", which denotes a 7-inch reel holding 750 units. Both share identical electrical and thermal specifications; the suffix solely identifies reel size and quantity for SMT placement equipment compatibility and inventory planning.
How does the P6SMB91A-E3/5B compare to bidirectional TVS diodes like P6SMB91CA?
The P6SMB91A-E3/5B is unidirectional and features a cathode band for polarity identification, whereas P6SMB91CA is bidirectional with no polarity marking and symmetric clamping in both directions. Unidirectional types offer lower leakage (<1 µA at VWM) and are preferred for DC line protection; bidirectional versions suit AC or differential signal lines. They are not interchangeable without circuit redesign due to polarity and leakage differences.
What is the thermal resistance of the P6SMB91A-E3/5B, and how does it affect PCB layout?
The P6SMB91A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads per terminal. To maintain TJ ≤ 150 °C under worst-case 5.0 W steady-state dissipation, designers must ensure adequate copper area and avoid thermal bottlenecks - undersized traces or insufficient thermal vias will cause premature thermal shutdown or parametric drift.
P6SMB91A-E3/5B 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:
- 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-E3/5B FAQ
1.How can I place an order for P6SMB91A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91A-E3/5B 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 P6SMB91A-E3/5B reliable?
The price and inventory of P6SMB91A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB91A-E3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB91A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91A-E3/5B?
P6SMB91A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91A-E3/5B 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 P6SMB91A-E3/5B?
For technical support, including P6SMB91A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91A-E3/5B requirements.
6.How does Aetrix verify that P6SMB91A-E3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB91A-E3/5B 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 P6SMB91A-E3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB91A-E3/5B?
All P6SMB91A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91A-E3/5B, 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 P6SMB91A-E3/5B part is unused and in its original packaging.
Return procedure for P6SMB91A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB91A-E3/5B Tags
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