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Vishay General Semiconductor - Diodes Division P6SMB91A-M3/52
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- Part No.:
- P6SMB91A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB91A-M3/52.pdf
- Description:
- TVS DIODE 77.8VWM 125VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,980
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Product details
Overview
P6SMB91A-M3/52 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 77.8 V stand-off voltage (VWM), 86.5–95.5 V breakdown voltage (VBR) at 1.0 mA, 125 V maximum clamping voltage (VC) at 4.8 A peak pulse current, and 600 W peak pulse power capability with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the P6SMB91A-M3/52 datasheet, P6SMB91A-M3/52 pinout, P6SMB91A-M3/52 application, or P6SMB91A-M3/52 equivalent, key selection criteria include unidirectional polarity, 125 V clamping performance at 4.8 A, SMB package thermal resistance (RθJA = 100 °C/W), halogen-free RoHS compliance (M3 suffix), and suitability for automated SMT placement in automotive-grade designs requiring AEC-Q101 qualification path.
Technical Context
This TVS diode operates as a voltage-clamping protection device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable leakage behavior and fast response time (<1 ns), while low incremental surge resistance enables effective energy diversion during ESD or inductive switching events.
The device is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient per Figure 2. With 100 A IFSM (8.3 ms half-sine) and 5.0 W steady-state power dissipation, it supports robust transient suppression without thermal runaway under repetitive surge conditions when mounted on 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 77.8 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping onset. |
| VBR (Breakdown) | 86.5–95.5 V at 1.0 mA - Confirmed avalanche initiation range; ensures predictable turn-on across production lot and temperature. |
| VC (Clamping) | 125 V at 4.8 A IPPM - Peak voltage seen by protected circuit during 10/1000 μs transient; determines downstream component voltage stress. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 μs waveform; validates protection against IEC 61000-4-5 Level 4 surges. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; requires ≥5.0 mm × 5.0 mm copper pad per terminal for rated power dissipation. |
| Package | SMB (DO-214AA) - Low-profile surface-mount outline with cathode band marking; compatible with standard SMT reflow profiles (MSL Level 1, 260 °C peak). |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix); meets JESD201 Class 2 whisker resistance and UL 94 V-0 flammability. |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, cathode indicated by a band on one end. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), with 5.59 mm overall length and 2.13 mm lead width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side of protected line; defines unidirectional conduction path during clamping. |
| Cathode | Avalanche conduction node / Clamping output | Marked with band; ties to higher-potential rail (e.g., VCC or signal line); sinks surge current into ground or return path. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Validates protection against high-energy transients like lightning-induced surges or inductive kickback in motor drives. |
| 125 V clamping voltage at 4.8 A | Limits voltage overshoot on 75–90 V systems (e.g., 48 V telecom or industrial DC rails) to within safe IC/MOSFET ratings. |
| Glass-passivated junction | Ensures stable reverse leakage (<1.0 μA at VWM) and long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free soldering without moisture-related popcorn failure or delamination risk. |
| AEC-Q101 qualification path available | Supports automotive applications via HE3/HM3 variants; M3 suffix confirms halogen-free construction for emission-sensitive environments. |
Applications
| Industrial Power Supply Protection | Automotive Sensor Interface Protection |
|---|---|
Use Scenario: Suppresses voltage spikes from relay coil de-energization or DC-DC converter switching noise on 48 V input rails. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and ground to clamp positive transients before they reach upstream regulators or controllers. Use Value: Limits transient voltage to ≤125 V, preventing latch-up or gate oxide damage in 100 V-rated MOSFETs and PMICs. |
Use Scenario: Shields CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump or jump-start events. IC Role / Device Role / Timing Role: Standoff-rated TVS on VCC line and signal lines to absorb fast-rising ESD (IEC 61000-4-2) and slow-rising surges (ISO 7637-2 Pulse 5a). Use Value: Maintains system uptime by preventing false resets or permanent damage in ADAS and body control modules. |
| Telecom DC Feeder Protection | Consumer Equipment Surge Mitigation |
Use Scenario: Protects PoE-powered equipment (e.g., IP cameras, access points) from induced surges on 57 V DC feeder lines. IC Role / Device Role / Timing Role: Primary clamping device on DC input, coordinated with upstream fuse and downstream filtering to meet GR-1089-CORE requirements. Use Value: Achieves 600 W surge rating with minimal board space, enabling compact outdoor-rated enclosure designs. |
Use Scenario: Guards USB-C PD ports, HDMI hot-plug detection lines, and audio codec inputs against user-handling ESD and AC-line coupled noise. IC Role / Device Role / Timing Role: Fast-response unidirectional suppressor placed adjacent to connector, referenced to local ground plane. Use Value: Reduces field failure rate by limiting ESD-induced latch-up in microcontrollers and interface ICs without adding series impedance. |
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 (Bourns) | Same SMB package, 90 V VBR min (85.5–94.5 V), 129 V VC at 4.7 A; slightly higher clamping voltage and lower PPPM (400 W). | Lower peak power rating limits use in high-energy industrial surge environments; suitable for consumer-grade ESD-only protection. | Select SMAJ90A only if design tolerates 4 V higher clamping and does not require full 600 W IEC 61000-4-5 compliance. |
| 1.5SMC91A (ON Semiconductor) | Same VBR range (86.5–95.5 V), identical 125 V VC, but in larger SMC (DO-214AB) package; RθJA = 65 °C/W vs. 100 °C/W. | Higher thermal efficiency allows higher duty-cycle operation; footprint incompatible with SMB-layout PCBs. | Choose 1.5SMC91A only when board layout permits SMC pad changes and thermal management demands lower junction rise. |
Compared with SMAJ90A and 1.5SMC91A, P6SMB91A-M3/52 delivers optimal balance of 600 W surge capacity, SMB footprint compatibility, and halogen-free compliance - making it preferred for space-constrained industrial and automotive-adjacent designs where both power density and material compliance matter.
Availability
P6SMB91A-M3/52 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, telecom DC feeders, and consumer equipment requiring stable component supply with halogen-free, RoHS-compliant construction.
Supply support for P6SMB91A-M3/52 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, thermal performance, and automotive-grade qualification.
The P6SMB Series targets high-reliability transient suppression in space-constrained applications, with design focus on automated SMT assembly, low-profile packaging, and consistent clamping performance across temperature and surge repetition rates.
FAQ
What is the maximum clamping voltage of the P6SMB91A-M3/52 under standard test conditions?
The P6SMB91A-M3/52 has a maximum clamping voltage (VC) of 125 V when subjected to a 10/1000 μs waveform peak pulse current of 4.8 A. This value is measured at TA = 25 °C with specified mounting conditions (0.2" × 0.2" copper pads). The clamping voltage directly defines the upper voltage limit imposed on protected circuits during surge events, ensuring compatibility with 100 V-rated components downstream of P6SMB91A-M3/52.
Is the P6SMB91A-M3/52 suitable for automotive applications?
The P6SMB91A-M3/52 itself is commercial-grade with halogen-free RoHS compliance (M3 suffix), but Vishay offers AEC-Q101 qualified versions under HE3/HM3 suffixes (e.g., P6SMB91AHE3_B). While P6SMB91A-M3/52 shares identical electrical characteristics and SMB package, it is not AEC-Q101 certified. For automotive use, specify P6SMB91AHE3_B or P6SMB91AHM3_B to ensure qualification per P6SMB91A-M3/52's electrical and thermal specifications.
What does the "M3" suffix indicate in P6SMB91A-M3/52?
The "M3" suffix in P6SMB91A-M3/52 denotes halogen-free, RoHS-compliant construction meeting JEDEC J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements. It also specifies matte tin-plated leads solderable per J-STD-002 and JESD22-B102. This distinguishes it from E3 (RoHS-compliant but not halogen-free) and HE3/HM3 (AEC-Q101 qualified) variants - all sharing identical P6SMB91A-M3/52 electrical performance and SMB mechanical form factor.
How does the thermal resistance of P6SMB91A-M3/52 affect its power handling?
P6SMB91A-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W, meaning each watt of power dissipated raises junction temperature by 100 °C above ambient. At 25 °C ambient, its 5.0 W steady-state power rating implies a 500 °C theoretical rise - but actual safe operation relies on derating per Figure 2 and proper PCB copper area (0.2" × 0.2" pads per terminal). Without adequate copper, P6SMB91A-M3/52 cannot sustain rated power without exceeding 150 °C TJ.
Can P6SMB91A-M3/52 be used in bidirectional configurations?
No - P6SMB91A-M3/52 is a unidirectional TVS diode, identified by its cathode band marking and specified VBR/VWM parameters for reverse-biased operation only. Bidirectional variants use "CA" suffix (e.g., P6SMB91CA). Using P6SMB91A-M3/52 in bidirectional signal paths would leave positive transients unprotected; always verify polarity alignment and select CA-suffix parts for AC-coupled or differential lines requiring symmetrical clamping.
P6SMB91A-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Box (TB)
- 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 (SMBJ)
P6SMB91A-M3/52 FAQ
1.How can I place an order for P6SMB91A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB91A-M3/52 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-M3/52 reliable?
The price and inventory of P6SMB91A-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB91A-M3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB91A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB91A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB91A-M3/52?
P6SMB91A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB91A-M3/52 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-M3/52?
For technical support, including P6SMB91A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB91A-M3/52 requirements.
6.How does Aetrix verify that P6SMB91A-M3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB91A-M3/52 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-M3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB91A-M3/52?
All P6SMB91A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB91A-M3/52, 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-M3/52 part is unused and in its original packaging.
Return procedure for P6SMB91A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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