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Vishay General Semiconductor - Diodes Division P6SMB56AHM3_A/H
- Part No.:
- P6SMB56AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB56AHM3_A/H.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,800
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Product details
Overview
P6SMB56AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 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 (IPPM), and 600 W peak pulse power (10/1000 µs waveform). It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and ESD in industrial and automotive electronics.
For engineers reviewing the P6SMB56AHM3_A/H datasheet, P6SMB56AHM3_A/H pinout, P6SMB56AHM3_A/H application, or P6SMB56AHM3_A/H equivalent, this device delivers verified AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, MSL Level 1 moisture sensitivity, and validated clamping performance under repetitive 0.01% duty-cycle surge conditions - critical for automotive-grade board-level ESD and load-dump protection design.
Technical Context
This unidirectional TVS operates with a glass-passivated junction and exhibits low incremental surge resistance (typical <1 Ω dynamic impedance), enabling rapid voltage clamping within picoseconds of transient onset. Its thermal resistance (RθJA = 100 °C/W, RθJL = 20 °C/W) supports reliable operation up to TJ = +150 °C when mounted on 5.0 mm × 5.0 mm copper pads per terminal.
The device features a stand-off voltage (VWM) of 47.8 V, reverse leakage (ID) ≤1.0 µA at VWM, and a temperature coefficient of VBR = +0.103 %/°C - ensuring stable breakdown behavior across automotive temperature ranges. It meets JESD201 Class 2 whisker resistance and solderability per J-STD-002/JESD22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at IT = 1.0 mA - defines precise voltage threshold where clamping initiates under standardized test conditions |
| VWM | 47.8 V - maximum continuous reverse operating voltage before significant leakage; ensures compatibility with 48 V nominal systems |
| VC @ IPPM | 77.0 V at 7.8 A - clamped voltage during 10/1000 µs surge; determines protected circuit's worst-case overvoltage exposure |
| PPPM | 600 W - peak pulse power handling capability; enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges |
| IPPM | 7.8 A - peak pulse current supported at VC; directly correlates with surge energy absorption (E ≈ VC × IPPM × tp) |
| TJ max. | +150 °C - maximum junction temperature; allows operation in under-hood automotive environments without derating |
| AEC-Q101 | Qualified - certified for automotive electronic modules per stress test requirements including HTGB, HTRB, and TCT |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode indicated by band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path (unidirectional) | Connected to system ground or low-side reference; conducts during forward surge events (e.g., reverse polarity protection) |
| Cathode | Clamping node (reverse-biased during normal operation) | Connected to protected line (e.g., CAN_H, LIN, sensor supply); enters avalanche breakdown to clamp transients above VWM |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports high-energy transients per ISO 7637-2 and IEC 61000-4-5 without failure or parameter shift |
| AEC-Q101 qualified (HM3 suffix) | Validated reliability for automotive control units, ADAS sensors, and body electronics requiring zero field failures |
| MSL Level 1 (260 °C reflow peak) | Enables single-pass lead-free reflow assembly without popcorn effect or delamination risk |
| Glass passivated junction | Ensures stable VBR and low leakage over lifetime; resists humidity-induced degradation in harsh environments |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream ICs - critical for 3.3 V/5 V logic and automotive microcontrollers |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor VOUT and ground, clamping negative transients and positive spikes above 47.8 V. Use Value: Prevents latch-up or gate oxide damage in op-amps and ADC front-ends by limiting voltage to ≤77.0 V during 100 V/50 ms load dump events. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers subjected to relay coil flyback and EFT bursts. IC Role / Device Role / Timing Role: Standoff-connected TVS on each input line, absorbing 600 W surges while maintaining <1 µA leakage at 24 V DC. Use Value: Eliminates false triggering and input stage damage without affecting signal integrity during 1 kHz switching of inductive loads. |
| Telecom Power Rail Protection | Consumer Device USB Port ESD |
Use Scenario: Shielding 48 V PoE-powered Ethernet switch ports from lightning-induced surges on data lines and auxiliary power rails. IC Role / Device Role / Timing Role: Primary clamping device on 48 V bias rail, coordinated with secondary GDT or MOV for staged energy diversion. Use Value: Limits rail collapse to ≤77.0 V during 10/1000 µs surges, preserving PHY IC functionality and preventing brownout resets. |
Use Scenario: Adding secondary-level ESD protection on USB VBUS lines in portable audio devices where primary protection resides upstream. IC Role / Device Role / Timing Role: Fast-response TVS shunting ESD pulses (>30 kV contact) between VBUS and chassis ground before reaching USB controller. Use Value: Achieves IEC 61000-4-2 Level 4 (±15 kV air/±8 kV contact) immunity without degrading 5 V regulation or causing bus reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ56A-E3/52 | Same VBR range (53.2–58.8 V), but SMA package (DO-214AC); lower PPPM = 400 W; non-AEC-Q101 | Limited to commercial-grade consumer/industrial use; unsuitable for automotive due to lack of qualification and lower surge rating | Select only for cost-sensitive, non-automotive designs where PCB space allows larger SMA footprint and 400 W suffices |
| 1.5SMC56A | Same electrical specs (VBR, VC, PPPM), but SMC (DO-214AB) package; higher thermal mass; no AEC-Q101 option | Better thermal dissipation in high-ambient environments, but incompatible with fine-pitch automated placement and automotive qualification requirements | Prefer for industrial power supplies needing enhanced thermal margin, but avoid where AEC-Q101 or SMB footprint is mandatory |
Compared with SMAJ56A-E3/52 and 1.5SMC56A, P6SMB56AHM3_A/H uniquely combines AEC-Q101 qualification, SMB footprint compatibility with high-density layouts, and full 600 W surge capability - making it the only drop-in solution for automotive signal-line protection where space, reliability, and standardization are jointly constrained.
Availability
P6SMB56AHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom PoE interfaces, and consumer USB power delivery systems requiring stable component supply with guaranteed long-term continuity.
Supply support for P6SMB56AHM3_A/H 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, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets board-level transient protection in automotive, industrial, and telecom systems, designed to replace older SMB-style TVS families with enhanced surge robustness, qualification rigor, and environmental compliance.
FAQ
What is the maximum clamping voltage of P6SMB56AHM3_A/H under a 10/1000 µs surge?
The maximum clamping voltage (VC) of P6SMB56AHM3_A/H is 77.0 V when subjected to its rated peak pulse current of 7.8 A using a 10/1000 µs waveform. This value is measured per JEDEC standards and ensures predictable overvoltage limiting for downstream components. The P6SMB56AHM3_A/H maintains this clamping performance across its full operating temperature range and after repeated surge events, provided thermal limits are observed.
Is P6SMB56AHM3_A/H qualified for automotive applications?
Yes, P6SMB56AHM3_A/H is AEC-Q101 qualified, as confirmed by the HM3 suffix and Vishay documentation. It has passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT), validating its suitability for under-hood and cabin-mounted automotive electronics. The P6SMB56AHM3_A/H is specifically intended for use in ADAS sensors, body control modules, and infotainment power rails where automotive-grade reliability is mandatory.
What does the "HM3" suffix indicate in P6SMB56AHM3_A/H?
The "HM3" suffix in P6SMB56AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (e.g., E3 or M3) and confirms compliance with automotive material requirements, including JESD201 Class 2 whisker resistance and lead-free reflow compatibility up to 260 °C. The P6SMB56AHM3_A/H is supplied in 7" tape-and-reel (H code) with 750 units per reel.
How does P6SMB56AHM3_A/H compare to bidirectional TVS diodes like P6SMB56CA?
P6SMB56AHM3_A/H is unidirectional and optimized for DC-biased lines (e.g., 48 V supply rails, sensor outputs), offering lower leakage (<1.0 µA at 47.8 V) and tighter VBR tolerance than bidirectional variants. In contrast, P6SMB56CA provides symmetrical clamping for AC-coupled or floating lines but exhibits higher leakage in both directions. The P6SMB56AHM3_A/H is not interchangeable with P6SMB56CA without circuit redesign due to polarity and leakage differences.
What is the thermal resistance of P6SMB56AHM3_A/H, and how does it affect layout?
P6SMB56AHM3_A/H 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 5.0 mm × 5.0 mm copper pads per terminal. To maintain TJ ≤150 °C during repetitive surges, PCB layout must provide adequate copper area and minimize trace length to ground. The P6SMB56AHM3_A/H requires no heatsink but benefits from thermal vias under pads in high-power-density designs.
P6SMB56AHM3_A/H 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:
- Obsolete
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB56AHM3_A/H FAQ
1.How can I place an order for P6SMB56AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB56AHM3_A/H 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 P6SMB56AHM3_A/H reliable?
The price and inventory of P6SMB56AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB56AHM3_A/H is usually 5 days.
3.What payment methods are accepted for P6SMB56AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB56AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB56AHM3_A/H?
P6SMB56AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB56AHM3_A/H 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 P6SMB56AHM3_A/H?
For technical support, including P6SMB56AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB56AHM3_A/H requirements.
6.How does Aetrix verify that P6SMB56AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P6SMB56AHM3_A/H 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 P6SMB56AHM3_A/H meets industry standards.
7.What is the process for return or replacement of P6SMB56AHM3_A/H?
All P6SMB56AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB56AHM3_A/H, 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 P6SMB56AHM3_A/H part is unused and in its original packaging.
Return procedure for P6SMB56AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB56AHM3_A/H Tags
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