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Vishay General Semiconductor - Diodes Division P6SMB91CA-E3/5B
- Part No.:
- P6SMB91CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91CA-E3/5B.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,186
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Product details
Overview
P6SMB91CA-E3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal and power 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), 125 V maximum clamping voltage (VC) at 4.8 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the P6SMB91CA-E3/5B datasheet, P6SMB91CA-E3/5B pinout, P6SMB91CA-E3/5B application, or P6SMB91CA-E3/5B equivalent, key selection considerations include bidirectional clamping capability, RoHS-compliant matte tin terminals, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads per terminal.
Technical Context
The P6SMB91CA-E3/5B operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance across temperature ranges from –65 °C to +150 °C.
It delivers 600 W peak pulse power handling under standardized 10/1000 μs waveform conditions, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling reliable operation in compact PCB layouts when mounted per recommended 0.2" × 0.2" copper pad footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 86.5 V / 95.5 V at IT = 1.0 mA - defines precise voltage threshold where avalanche conduction begins in both directions |
| VWM | 77.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA, ensuring no false triggering during normal operation |
| VC @ IPPM | 125 V at 4.8 A - clamped voltage seen by protected circuit during worst-case 600 W transient, limiting stress on downstream components |
| PPPM | 600 W - peak pulse power dissipation capability with 10/1000 μs waveform, validated for ≤0.01% duty cycle repetitive surges |
| IFSM | Not applicable - bidirectional device has no forward surge rating; only unidirectional variants specify 100 A 8.3 ms half-sine rating |
| TJ max. | +150 °C - maximum junction temperature allowing sustained operation in high-ambient environments like motor drives or telecom power stages |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 0.220" × 0.130" footprint, compatible with standard reflow profiles and J-STD-020 MSL Level 1 |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, no polarity marking for bidirectional configuration; terminals are solderable per J-STD-002 and JESD 22-B102, rated for 260 °C peak reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as cathode during positive transients and anode during negative transients - symmetrical conduction enables dual-polarity protection without orientation constraints |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode in CA-series devices; no band marking required - simplifies layout and eliminates assembly polarity errors |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN bus, sensor bridges) without external polarity management |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surge events (4 kV line-earth, 2 kV line-line) when properly laid out on 5.0 mm × 5.0 mm copper pads |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes voltage overshoot during clamping - critical for protecting 100 V-rated MOSFETs or 3.3 V/5 V logic interfaces downstream |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking - reduces manufacturing overhead in high-volume SMT production |
| RoHS-compliant E3 suffix | Meets EU Directive 2011/65/EU with matte tin terminations; qualified to JESD 201 Class 2 whisker resistance for long-term reliability |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and current-sense amplifiers against inductive kickback from brushed DC motors and solenoids. IC Role / Device Role / Timing Role: Bidirectional TVS placed across motor coil terminals and near gate driver IC inputs to clamp ±100 V transients. Use Value: Prevents latch-up or permanent damage to 100 V-rated N-channel MOSFETs and rail-to-rail op-amps operating at 12 V/24 V supply rails. |
Use Scenario: Surge suppression on LIN bus lines and interior lighting control outputs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff voltage (77.8 V) exceeds automotive battery transients up to 60 V, while clamping at 125 V protects LIN transceivers. Use Value: Eliminates need for discrete Zener+resistor networks - reduces BOM count and PCB area in space-constrained BCM modules. |
| Telecom Power Rectification | Consumer Appliance Sensor Interfaces |
|
Use Scenario: Input-stage protection of offline AC-DC converters and PoE injectors subjected to lightning-induced surges on primary-side windings. IC Role / Device Role / Timing Role: Mounted across bridge rectifier outputs to limit voltage spikes before bulk capacitor charging circuits. Use Value: Withstands 600 W pulses without degradation, maintaining system uptime in outdoor telecom cabinets with limited heat sinking. |
Use Scenario: ESD and EFT protection for analog temperature/humidity sensors connected to microcontrollers via 2 m twisted-pair cables. IC Role / Device Role / Timing Role: Placed at connector entry point to shunt 8 kV contact discharge energy before reaching 3.3 V ADC input pins. Use Value: Junction capacitance <100 pF (typ.) avoids signal integrity loss on 10 kHz sensor bandwidth channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90CA | Same SMB package, 90 V nominal VBR (85.5–94.5 V), 121 V VC at 5.0 A - slightly tighter VBR tolerance and lower clamping voltage | Preferred where tighter VBR matching is required for precision overvoltage cutoff, e.g., in regulated auxiliary supplies | Select SMBJ90CA if system-level testing confirms 121 V clamping meets margin requirements and tighter VBR improves trip consistency. |
| 1.5SMC91CA | Higher-power 1500 W rating in larger SMC (DO-214AB) package; same VBR range but 125 V VC at 12.5 A - requires 3× PCB area and different thermal design | Suitable for high-energy surge environments (e.g., outdoor AC mains input) where 600 W is insufficient | Choose 1.5SMC91CA only when surge test compliance demands >600 W capability and board space allows SMC footprint. |
Compared with SMBJ90CA, P6SMB91CA-E3/5B offers broader VBR tolerance and higher surge current derating margin above 100 °C; versus 1.5SMC91CA, it provides identical clamping performance in half the footprint and thermal mass - ideal for dense, thermally constrained designs.
Availability
P6SMB91CA-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power rectification, and consumer appliance sensor interfaces requiring stable component supply, consistent RoHS-compliant sourcing, and full traceability.
Supply support for P6SMB91CA-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, power efficiency, and automotive-grade qualification.
The P6SMB Series targets cost-sensitive, high-volume transient protection applications across industrial, automotive, and telecom markets - engineered for robustness under repetitive surge stress and compatibility with automated SMT assembly.
FAQ
What is the breakdown voltage range for P6SMB91CA-E3/5B?
The P6SMB91CA-E3/5B has a guaranteed breakdown voltage (VBR) range of 86.5 V to 95.5 V at test current IT = 1.0 mA, measured in both directions due to its bidirectional construction. This range reflects manufacturing tolerance and ensures reliable clamping initiation across production lots while maintaining compatibility with 100 V system voltage margins. The value is confirmed in Vishay's official datasheet revision 09-Jan-2024, Document Number 88370.
Is P6SMB91CA-E3/5B suitable for automotive applications?
P6SMB91CA-E3/5B is RoHS-compliant and MSL Level 1 qualified, but it is not AEC-Q101 certified. For automotive use, Vishay offers the P6SMB91CAHE3_B variant (with HE3 suffix), which adds AEC-Q101 qualification. The P6SMB91CA-E3/5B remains appropriate for non-safety-critical automotive subsystems such as infotainment power rails or cabin lighting controls where formal qualification is not mandated. Always verify end-equipment requirements before deployment.
What does the "CA" suffix indicate in P6SMB91CA-E3/5B?
The "CA" suffix in P6SMB91CA-E3/5B explicitly denotes a bidirectional Transient Voltage Suppressor - meaning the device clamps overvoltage transients equally in both polarities, with no cathode band marking required. This distinguishes it from unidirectional "A" variants (e.g., P6SMB91A), which conduct only in reverse bias and require correct PCB orientation. The CA configuration simplifies layout and eliminates polarity-related assembly errors in AC or floating signal paths.
What is the maximum clamping voltage of P6SMB91CA-E3/5B under surge conditions?
The maximum clamping voltage (VC) of P6SMB91CA-E3/5B is 125 V at peak pulse current IPPM = 4.8 A, tested with the standard 10/1000 μs double-exponential waveform. This value represents the highest voltage imposed on protected circuitry during worst-case transient events and is critical for ensuring downstream components (e.g., 100 V MOSFETs or 3.3 V logic) remain within safe operating limits. It is measured per ANSI/IEEE C62.35 and documented in the Vishay P6SMB Series datasheet.
How does the P6SMB91CA-E3/5B differ from the P6SMB91A-E3/5B?
The P6SMB91CA-E3/5B is bidirectional with symmetrical clamping in both voltage polarities and no polarity marking, whereas the P6SMB91A-E3/5B is unidirectional, featuring a cathode band and conducting only during reverse-bias transients. The unidirectional version specifies IFSM = 100 A (8.3 ms half-sine), while the CA variant omits this rating. Layout, thermal design, and application context (e.g., DC vs. AC-coupled lines) determine which variant is appropriate - P6SMB91CA-E3/5B is preferred for RS-485, CAN, or sensor bridge protection.
P6SMB91CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
P6SMB91CA-E3/5B FAQ
1.How can I place an order for P6SMB91CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91CA-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 P6SMB91CA-E3/5B reliable?
The price and inventory of P6SMB91CA-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 P6SMB91CA-E3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB91CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91CA-E3/5B?
P6SMB91CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91CA-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 P6SMB91CA-E3/5B?
For technical support, including P6SMB91CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91CA-E3/5B requirements.
6.How does Aetrix verify that P6SMB91CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB91CA-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 P6SMB91CA-E3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB91CA-E3/5B?
All P6SMB91CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91CA-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 P6SMB91CA-E3/5B part is unused and in its original packaging.
Return procedure for P6SMB91CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB91CA-E3/5B Tags
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