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Vishay General Semiconductor - Diodes Division P6SMB56A-M3/5B
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- Part No.:
- P6SMB56A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB56A-M3/5B.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,487
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Product details
Overview
P6SMB56A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 56 V breakdown voltage (VBR = 53.2–58.8 V at IT = 1.0 mA), 77.0 V maximum clamping voltage (VC) at 7.8 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed to safeguard MOSFETs, ICs, and sensor interfaces against ESD and inductive switching transients in industrial and automotive electronics.
For engineers reviewing the P6SMB56A-M3/5B datasheet, P6SMB56A-M3/5B pinout, P6SMB56A-M3/5B application, or P6SMB56A-M3/5B equivalent, this page delivers verified electrical parameters, SMB (DO-214AA) package details, clamping performance under surge conditions, thermal resistance data, and qualified AEC-Q101 alternatives - all critical for transient protection design validation and BOM selection.
Technical Context
The P6SMB56A-M3/5B operates as a unidirectional avalanche diode with cathode-band polarity marking, optimized for fast response (<1 ps typical) and low incremental surge resistance to limit transient energy delivered to downstream circuitry. Its glass-passivated junction ensures stable VBR tolerance (±5%) and long-term reliability under repetitive surge stress.
Rated for 150 °C maximum junction temperature and MSL Level 1 (260 °C reflow peak), it supports automated SMT assembly on standard PCB pads (0.2" × 0.2" copper). The device meets JESD201 Class 2 whisker resistance and is halogen-free, RoHS-compliant (M3 suffix), with no lead finish restrictions beyond matte tin plating per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at 1.0 mA test current - defines precise avalanche initiation threshold for predictable clamping onset |
| VWM | 47.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA, ensuring safe standby operation |
| VC @ IPPM | 77.0 V at 7.8 A - clamped voltage during 600 W 10/1000 µs surge, directly limiting stress on protected ICs |
| PPPM | 600 W - peak pulse power handling capability, enabling protection against IEC 61000-4-5 Level 4 surges |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads, guiding thermal layout requirements |
| IFSM | 100 A - non-repetitive forward surge current rating (8.3 ms half-sine), supporting high-energy transient absorption |
| TJ max. | +150 °C - maximum junction temperature, allowing operation in under-hood automotive or industrial ambient environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant (M3 suffix), with matte tin-plated leads solderable per J-STD-002. Cathode identified by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VRM exceeded |
| Anode (unbanded end) | Reference node | Typically tied to system ground or lower-potential rail; completes conduction path during clamping |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity standards up to Level 4 in compact SMB footprint |
| 77.0 V clamping voltage at 7.8 A | Restricts voltage overshoot across protected ICs to safe levels during 100 ns–1 µs transients |
| Glass passivated junction | Ensures stable VBR drift < ±5% over lifetime and improved humidity resistance vs. epoxy-passivated alternatives |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow without popcorn effect or delamination risk |
| AEC-Q101 qualified variant available | Enables drop-in use in automotive ECUs where qualification to AEC-Q101 is mandatory (e.g., P6SMB56AHM3_B) |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply rails in body control modules from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps 120 V/200 ms load-dump spikes to ≤77 V, preventing damage to upstream regulators and microcontrollers. |
Use Scenario: Shielding analog front-end inputs of pressure/temperature sensors in PLC I/O modules from field-wiring induced surges. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted at connector entry point, shunting transients before signal conditioning circuitry. Use Value: Limits transient voltage to 77.0 V while maintaining <1.0 µA leakage at 47.8 V, preserving sensor accuracy and offset stability. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
|
Use Scenario: Safeguarding Ethernet PHY power pins and bias rails in PoE-powered switches against lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on +48 V PoE input, coordinated with secondary-side MOVs and GDTs. Use Value: Absorbs 600 W surge energy within 1 µs response time, reducing let-through voltage to downstream PMICs and PHY ICs. |
Use Scenario: Overvoltage suppression on AC-DC adapter primary-side rectifier output before bulk capacitor. IC Role / Device Role / Timing Role: Unidirectional clamp across bridge rectifier output to suppress switching spikes and line transients. Use Value: Withstands 100 A IFSM, enabling reliable protection against repeated 8.3 ms half-sine surges without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ58A | Same SMB package, but 58 V VBR (55.1–60.9 V), 79.0 V VC at 7.6 A; slightly higher clamping and tighter VBR tolerance (±5% vs. ±5% identical) | Marginally higher clamping may reduce protection margin for 56 V-rated systems; suitable where 58 V standoff is acceptable | Select SMAJ58A only if system VWM allows ≥58 V standoff and clamping headroom permits 79.0 V |
| P6SMB56AHM3_B | Identical electrical specs; AEC-Q101 qualified, halogen-free, same M3 suffix, with "_B" revision code indicating automotive qualification | Required for automotive-grade designs needing formal AEC-Q101 certification (e.g., infotainment, ADAS power rails) | Choose P6SMB56AHM3_B when automotive qualification is mandated; otherwise P6SMB56A-M3/5B suffices for commercial/industrial use |
Compared with SMAJ58A, P6SMB56A-M3/5B offers tighter alignment to 56 V system rails and lower clamping voltage; versus P6SMB56AHM3_B, it provides identical protection performance without AEC-Q101 overhead - making it optimal for cost-sensitive, non-automotive applications requiring proven surge resilience.
Availability
P6SMB56A-M3/5B is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and consumer appliance control boards requiring stable component supply, consistent SMB packaging, and verified 600 W surge handling.
Supply support for P6SMB56A-M3/5B 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, efficiency, and ruggedness.
The P6SMB Series targets high-energy transient suppression in space-constrained applications, delivering 600 W pulse power in the ultra-low-profile SMB package for automotive, industrial, and communications infrastructure.
FAQ
What is the breakdown voltage range of the P6SMB56A-M3/5B?
The P6SMB56A-M3/5B has a specified breakdown voltage (VBR) range of 53.2 V to 58.8 V at a test current of 1.0 mA, measured per ANSI/IEEE C62.35. This ±5% tolerance ensures consistent avalanche initiation across production lots and enables precise coordination with downstream overvoltage thresholds in protected circuits. The value is confirmed in Vishay's official datasheet revision 09-Jan-2024, Document Number 88370.
Does the P6SMB56A-M3/5B meet automotive qualification standards?
The P6SMB56A-M3/5B itself is a commercial-grade, halogen-free, RoHS-compliant part and is not AEC-Q101 qualified. However, Vishay offers the functionally identical P6SMB56AHM3_B variant - which shares the same electrical characteristics, SMB package, and M3 suffix - explicitly qualified to AEC-Q101 for automotive applications. For non-automotive use, P6SMB56A-M3/5B remains fully suitable and widely deployed in industrial and telecom systems.
What is the maximum clamping voltage of the P6SMB56A-M3/5B under surge conditions?
The P6SMB56A-M3/5B exhibits a maximum clamping voltage (VC) of 77.0 V when subjected to its rated peak pulse current of 7.8 A, defined by the 10/1000 µs waveform. This value represents the upper bound of voltage seen by protected circuitry during worst-case transient events and is critical for verifying that downstream components remain within their absolute maximum ratings. It is measured per standardized test conditions in the Vishay datasheet.
Can the P6SMB56A-M3/5B be used in bidirectional configurations?
No - the P6SMB56A-M3/5B is strictly a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional variants in the same series carry the "CA" suffix (e.g., P6SMB56CA). Using P6SMB56A-M3/5B in reverse-biased AC applications would result in forward conduction and potential failure. For bidirectional protection, select the CA version with matched VBR and VC in both directions.
What is the thermal resistance and recommended pad layout for the P6SMB56A-M3/5B?
The P6SMB56A-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB with no internal planes. To maintain reliability under repetitive surges, designers must adhere to Vishay's specified pad dimensions and avoid excessive copper removal near terminals. Thermal derating above 25 °C ambient is defined in Figure 2 of the datasheet.
P6SMB56A-M3/5B 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):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 7.8A
- 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)
P6SMB56A-M3/5B FAQ
1.How can I place an order for P6SMB56A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB56A-M3/5B 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 P6SMB56A-M3/5B reliable?
The price and inventory of P6SMB56A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB56A-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB56A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB56A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB56A-M3/5B?
P6SMB56A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB56A-M3/5B 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 P6SMB56A-M3/5B?
For technical support, including P6SMB56A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB56A-M3/5B requirements.
6.How does Aetrix verify that P6SMB56A-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB56A-M3/5B 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 P6SMB56A-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB56A-M3/5B?
All P6SMB56A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB56A-M3/5B, 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 P6SMB56A-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB56A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB56A-M3/5B Tags
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