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Vishay General Semiconductor - Diodes Division P6SMB20A-M3/52
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- Part No.:
- P6SMB20A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB20A-M3/52.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,993
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Product details
Overview
P6SMB20A-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 20 V standoff voltage (VWM), 21.0 V maximum breakdown voltage (VBR), 27.7 V clamping voltage at 21.7 A peak pulse current, 600 W peak pulse power (10/1000 µs), and operates across -65 °C to +150 °C junction temperature range - deployed in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the P6SMB20A-M3/52 datasheet, P6SMB20A-M3/52 pinout, P6SMB20A-M3/52 application, or P6SMB20A-M3/52 equivalent, key selection criteria include unidirectional polarity, SMB package thermal resistance (RθJA = 100 °C/W), halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification eligibility via HM3 variant - critical for automotive-grade ESD and load-dump transient immunity design.
Technical Context
The P6SMB20A-M3/52 uses a glass-passivated silicon junction optimized for fast response (<1 ns) to transient overvoltages and low incremental surge resistance to maintain stable clamping during repetitive 10/1000 µs pulses at 0.01% duty cycle. Its unidirectional architecture enables integration into DC-biased circuits where reverse conduction must be blocked until breakdown threshold is exceeded.
Thermal performance is defined by RθJL = 20 °C/W (junction-to-lead) and RθJA = 100 °C/W (junction-to-ambient on 5.0 mm × 5.0 mm copper pads), supporting reliable operation up to 150 °C junction temperature. The device meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow peak, enabling compatibility with standard SMT assembly processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17.1 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping onset. |
| VBR (Breakdown Voltage) | 19.0–21.0 V at 1.0 mA test current - Ensures predictable turn-on within tight tolerance for consistent transient suppression timing. |
| VC (Clamping Voltage) | 27.7 V at 21.7 A IPPM - Limits downstream component stress during 600 W transient events without sacrificing response speed. |
| PPPM (Peak Pulse Power) | 600 W (10/1000 µs waveform) - Supports robust immunity against ISO 7637-2 Load Dump and IEC 61000-4-5 surge waveforms. |
| IPPM (Peak Pulse Current) | 21.7 A - Determines minimum trace width and PCB copper area required to sustain single-pulse energy without thermal failure. |
| TJ max. | +150 °C - Enables deployment in under-hood automotive environments and high-temperature industrial control cabinets. |
| Package | SMB (DO-214AA) - Standardized surface-mount footprint compatible with automated placement and reflow soldering; 0.220" × 0.130" body size. |
Pinout & Package
SMB (DO-214AA) package with matte tin-plated leads, compliant with J-STD-002 and JESD 22-B102 solderability standards. Cathode indicated by band; anode is unmarked end. Molding compound meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VWM exceeded - requires low-inductance path to reference plane. |
| Anode (unmarked end) | Reference potential node | Typically tied to system ground or lower-potential rail; establishes unidirectional conduction path and defines clamping polarity. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against severe transients like ISO 16750-2 load dump without parallel staging. |
| 27.7 V clamping voltage at 21.7 A | Keeps protected IC supply rails within safe operating limits during surge events - critical for 24 V automotive systems. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for global automotive and industrial OEMs without compromising electrical performance. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling - reduces manufacturing complexity. |
| AEC-Q101 qualification path (HM3 variant) | Provides documented reliability pathway for automotive applications requiring qualification evidence beyond commercial grade. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load dump and inductive switching transients in 12 V/24 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before they reach sensitive input pins of transceiver ICs. Use Value: Prevents latch-up or permanent damage to sensor signal conditioning circuitry during ISO 7637-2 Pulse 5a (load dump) events up to 600 W. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected across input terminals to shunt transient energy away from optocoupler input stages and series current-limiting resistors. Use Value: Maintains functional safety integrity by limiting input voltage to ≤27.7 V during 10/1000 µs surges, preserving isolation barrier reliability. |
| Telecom Power Supply Rail Clamping | Consumer Appliance Motor Driver Protection |
Use Scenario: Secondary-side transient suppression on 5 V/12 V DC-DC outputs powering baseband processors and RF front-ends in telecom infrastructure equipment. IC Role / Device Role / Timing Role: Fast-response TVS placed adjacent to power converter output capacitor to suppress ringing and EFT-induced spikes. Use Value: Reduces need for oversized output capacitance by clamping sub-100 ns transients that would otherwise propagate to downstream logic. |
Use Scenario: Overvoltage protection on H-bridge gate drive supply rails in smart home appliance motor controllers subjected to brush-commutator noise. IC Role / Device Role / Timing Role: Unidirectional clamping device tied between VDD and GND to prevent gate oxide rupture in MOSFET drivers during commutation spikes. Use Value: Extends driver IC lifetime by limiting transient overvoltage to 27.7 V - well below typical 30 V absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A | Same VWM (17.1 V), identical SMB package, but lower PPPM (400 W) and higher VC (32.4 V at 12.3 A). | Limited to less severe surge environments (e.g., IEC 61000-4-2 ESD only); insufficient for ISO 7637-2 load dump. | Select SMAJ20A only if system-level testing confirms 400 W clamping capability meets transient immunity requirements. |
| SMCJ20A | Higher PPPM (1500 W), same VWM/VBR, but larger SMC (DO-214AB) package (0.285" × 0.235") and higher RθJA (60 °C/W). | Required for high-energy transients (e.g., lightning-induced surges in outdoor telecom enclosures); occupies more PCB area. | Choose SMCJ20A when 600 W is inadequate and board space allows larger footprint - not drop-in compatible with SMB layout. |
Compared with SMAJ20A and SMCJ20A, P6SMB20A-M3/52 delivers optimal balance of 600 W surge handling, SMB footprint constraints, and halogen-free compliance - making it the preferred choice for space-constrained automotive and industrial modules requiring validated commercial-grade transient immunity.
Availability
P6SMB20A-M3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC inputs, telecom power rails, and consumer appliance motor drivers requiring stable component supply with halogen-free compliance and MSL Level 1 reflow readiness.
Supply support for P6SMB20A-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series was developed for surface-mount transient suppression in automotive, industrial, and telecom systems - prioritizing high-power pulse handling, fast response, and standardized packaging for automated manufacturing.
FAQ
What is the clamping voltage of P6SMB20A-M3/52 at its rated peak pulse current?
The P6SMB20A-M3/52 has a maximum clamping voltage (VC) of 27.7 V at 21.7 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per JEDEC standards and ensures downstream components remain within safe voltage limits during surge events. The P6SMB20A-M3/52 achieves this while maintaining low incremental resistance to minimize voltage overshoot during fast-rising transients.
Is P6SMB20A-M3/52 suitable for automotive applications?
P6SMB20A-M3/52 is halogen-free and RoHS-compliant, with an M3 suffix indicating commercial-grade qualification. While the base P6SMB20A-M3/52 is not AEC-Q101 qualified, Vishay offers the HM3 variant (e.g., P6SMB20AHM3_B/H) which is AEC-Q101 qualified for automotive use. Engineers selecting P6SMB20A-M3/52 for automotive designs should verify whether AEC-Q101 certification is mandatory for their specific application tier.
What does the "/52" suffix indicate in P6SMB20A-M3/52?
The "/52" suffix in P6SMB20A-M3/52 specifies the packaging configuration: 7-inch diameter plastic tape and reel containing 750 units. This format supports standard SMT pick-and-place equipment and is compatible with automated assembly lines. The "M3" denotes halogen-free, RoHS-compliant construction, while "52" is the delivery mode code per Vishay's ordering nomenclature.
How does P6SMB20A-M3/52 compare to bidirectional TVS diodes like P6SMB20CA?
P6SMB20A-M3/52 is unidirectional and intended for DC-biased lines where reverse conduction must be blocked; P6SMB20CA is bidirectional and suited for AC-coupled or symmetrical signal paths like data lines. Their VWM and VBR values differ: P6SMB20A-M3/52 has 17.1 V VWM, whereas P6SMB20CA has 17.1 V VWM in both directions. Pinout and package are identical, but polarity marking (cathode band) applies only to the unidirectional P6SMB20A-M3/52.
What is the thermal resistance of P6SMB20A-M3/52, and how does it affect PCB layout?
P6SMB20A-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) 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. The P6SMB20A-M3/52 benefits from symmetric pad layout and optional thermal vias to inner ground planes for enhanced heat spreading.
P6SMB20A-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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- 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)
P6SMB20A-M3/52 FAQ
1.How can I place an order for P6SMB20A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB20A-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 P6SMB20A-M3/52 reliable?
The price and inventory of P6SMB20A-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 P6SMB20A-M3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB20A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB20A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB20A-M3/52?
P6SMB20A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB20A-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 P6SMB20A-M3/52?
For technical support, including P6SMB20A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB20A-M3/52 requirements.
6.How does Aetrix verify that P6SMB20A-M3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB20A-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 P6SMB20A-M3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB20A-M3/52?
All P6SMB20A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB20A-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 P6SMB20A-M3/52 part is unused and in its original packaging.
Return procedure for P6SMB20A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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