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Vishay General Semiconductor - Diodes Division P6SMB56AHM3/I
- Part No.:
- P6SMB56AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB56AHM3/I.pdf
- Description:
- TVS DIODE 47.8VWM 77VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,995
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Product details
Overview
P6SMB56AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 56 V breakdown voltage (VBR = 53.2–58.8 V at IT = 1.0 mA), 47.8 V stand-off voltage (VWM), 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 on power rails and signal lines in automotive and industrial control units.
For engineers reviewing the P6SMB56AHM3/I datasheet, P6SMB56AHM3/I pinout, P6SMB56AHM3/I application, or P6SMB56AHM3/I equivalent, this device delivers verified AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, MSL Level 1 moisture sensitivity, and low incremental surge resistance - critical for high-reliability transient suppression in automotive ECUs and industrial sensor interfaces.
Technical Context
The P6SMB56AHM3/I operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast response time (<1 ns) and stable clamping under repetitive transients. Its thermal resistance (RθJA = 100 °C/W) and junction temperature range (–65 °C to +150 °C) support operation in thermally constrained PCB layouts without active cooling.
Designed for 10/1000 µs surge waveforms at 0.01% duty cycle, it sustains 600 W peak pulse power and 100 A non-repetitive forward surge current (IFSM), with reverse leakage limited to ≤1.0 µA at VWM. The cathode band marking enables unambiguous polarity identification during automated placement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at 1.0 mA test current - defines reliable avalanche initiation threshold across manufacturing lot and temperature. |
| VWM | 47.8 V - maximum continuous reverse operating voltage before significant leakage; sets safe margin below system rail voltage. |
| VC @ IPPM | 77.0 V at 7.8 A - clamping voltage during 10/1000 µs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 600 W - peak pulse power handling capability; validates immunity to IEC 61000-4-5 Level 4 surges (4 kV) when properly mounted. |
| IFSM | 100 A - 8.3 ms half-sine surge current rating; supports protection against inductive switch-off events in motor drivers. |
| TJ max. | +150 °C - maximum junction temperature; enables use in under-hood automotive environments without derating. |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 0.220" × 0.130" footprint; compatible with J-STD-020 reflow profiles. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1, lead-free and halogen-free (HM3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge or ESD event. |
| Cathode | Avalanche clamping terminal | Marked with band; connected to protected line (e.g., 48 V supply rail); initiates clamping when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress. |
| AEC-Q101 qualified (HM3) | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
| 600 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive equipment. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during transient events, reducing risk of downstream IC latch-up or damage. |
| MSL Level 1, 260 °C peak reflow | Enables standard SMT assembly without pre-baking; supports high-volume automated manufacturing. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-supplied microcontrollers and CAN transceivers from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and ground to clamp surges up to ±120 V while maintaining low leakage at 48 V nominal. Use Value: Prevents permanent damage to 5 V/3.3 V LDOs and MCU I/Os by limiting clamped voltage to 77.0 V during 600 W pulses. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA current loops) and digital sensor interfaces (I²C, SPI) in PLC modules exposed to field wiring transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on signal lines with VWM = 47.8 V ensures no interference during normal operation while responding in <1 ns to EFT bursts. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) without adding series impedance or signal distortion. |
| Telecom DC Power Input Protection | Motor Drive Gate Driver Protection |
|
Use Scenario: Securing -48 V telecom rectifier outputs against lightning-induced surges entering central office equipment. IC Role / Device Role / Timing Role: Unidirectional TVS installed at input stage to absorb 10/1000 µs surges up to 600 W while maintaining <1 µA leakage at -48 V. Use Value: Maintains system uptime by preventing fuse blowing or MOSFET failure during repeated 4 kV surge events per IEC 61000-4-5. |
Use Scenario: Shielding high-side gate drivers in BLDC inverters from Miller-induced voltage spikes during IGBT/MOSFET switching. IC Role / Device Role / Timing Role: Clamping diode placed across gate-source terminals to suppress dv/dt-induced overshoot exceeding VGS rating. Use Value: Extends gate driver lifetime by limiting transient gate voltage to ≤77.0 V, avoiding oxide breakdown in SiC/GaN drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ56A-E3/5B | Same VBR (53.2–58.8 V) and VC (77.0 V), but SMA package (smaller footprint, higher RθJA = 140 °C/W), non-AEC-Q101, RoHS-compliant only. | Limited to commercial-grade applications; unsuitable for automotive due to lack of AEC-Q101 qualification and reduced thermal margin. | Select when board space is constrained and automotive qualification is not required. |
| 1.5SMC56AHE3/A | Same electrical specs, but larger SMC (DO-214AB) package (higher power handling margin), AEC-Q101 qualified, halogen-free (HE3 suffix), RθJA = 60 °C/W. | Better thermal performance and higher surge margin; used where extended pulse duration or repeated surges demand lower junction temperature rise. | Select when system-level surge testing exceeds single-pulse 600 W or ambient temperature exceeds 105 °C. |
Compared with SMAJ56A-E3/5B, P6SMB56AHM3/I offers automotive qualification and superior thermal reliability in SMB form factor; versus 1.5SMC56AHE3/A, it trades package size for tighter board integration while retaining AEC-Q101 compliance and halogen-free construction.
Availability
P6SMB56AHM3/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom power supply inputs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P6SMB56AHM3/I 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, precision, and automotive-grade validation.
The P6SMB Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 compliance, low clamping ratio, and consistent surge performance are mandatory.
FAQ
What is the maximum clamping voltage of the P6SMB56AHM3/I under a 10/1000 µs surge?
The P6SMB56AHM3/I has a maximum clamping voltage (VC) of 77.0 V at 7.8 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per JEDEC standards and reflects the actual voltage seen by protected circuitry during worst-case transient events. The P6SMB56AHM3/I maintains this clamping performance across its specified operating temperature range and after multiple surge cycles, provided PCB layout follows Vishay's recommended 0.2" × 0.2" copper pad guidelines.
Is the P6SMB56AHM3/I qualified for automotive applications?
Yes, the P6SMB56AHM3/I is AEC-Q101 qualified, as indicated by the "HM3" suffix - denoting halogen-free, RoHS-compliant, and automotive-grade construction. It has undergone stress testing including temperature cycling, high-temperature operating life, and surge robustness per AEC-Q101 Rev D. The P6SMB56AHM3/I is routinely deployed in engine control modules, body control units, and ADAS sensor interfaces where sustained reliability under vibration, thermal shock, and electrical transients is required.
What does the "I" suffix mean in P6SMB56AHM3/I?
The "I" suffix in P6SMB56AHM3/I specifies the packaging configuration: 13-inch diameter plastic tape and reel, with 3200 units per reel. This format supports high-speed pick-and-place assembly and is aligned with IPC-7351B land pattern recommendations for SMB (DO-214AA). The "HM3" portion confirms halogen-free, RoHS-compliant materials and AEC-Q101 qualification, while the base "P6SMB56A" identifies the 56 V unidirectional TVS variant within the P6SMB family.
How does the P6SMB56AHM3/I compare to bidirectional TVS diodes like P6SMB56CA?
The P6SMB56AHM3/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., +48 V rail to ground), offering lower leakage (<1.0 µA at VWM) and higher surge current capability in one direction. In contrast, P6SMB56CA is bidirectional, suited for AC-coupled or floating signal lines (e.g., RS-485, USB D+/D−), but exhibits higher leakage and symmetric clamping. The P6SMB56AHM3/I cannot substitute for P6SMB56CA in AC applications without circuit redesign due to polarity dependence and absence of reverse-direction clamping.
What is the thermal resistance and maximum junction temperature of the P6SMB56AHM3/I?
The P6SMB56AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal, and a maximum junction temperature (TJ) of +150 °C. This allows continuous operation in under-hood automotive environments (up to +125 °C ambient) with appropriate power derating above 25 °C. The P6SMB56AHM3/I's RθJA is validated per JESD51-2, and its TJ limit ensures silicon integrity during both steady-state and transient thermal loads.
P6SMB56AHM3/I 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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for P6SMB56AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB56AHM3/I 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/I reliable?
The price and inventory of P6SMB56AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB56AHM3/I is usually 5 days.
3.What payment methods are accepted for P6SMB56AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB56AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB56AHM3/I?
P6SMB56AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB56AHM3/I 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/I?
For technical support, including P6SMB56AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB56AHM3/I requirements.
6.How does Aetrix verify that P6SMB56AHM3/I is sourced from the original manufacturer or authorized distributors?
All P6SMB56AHM3/I 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/I meets industry standards.
7.What is the process for return or replacement of P6SMB56AHM3/I?
All P6SMB56AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB56AHM3/I, 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/I part is unused and in its original packaging.
Return procedure for P6SMB56AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB56AHM3/I Tags
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