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Vishay General Semiconductor - Diodes Division P6SMB51AHM3_B/I
- Part No.:
- P6SMB51AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51AHM3_B/I.pdf
- Description:
- 600W,51V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,005
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Product details
Overview
P6SMB51AHM3_B/I 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 51 V breakdown voltage (VBR = 48.5–53.6 V at IT = 1.0 mA), 43.6 V stand-off voltage (VWM), 70.1 V maximum clamping voltage (VC) at 8.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the P6SMB51AHM3_B/I datasheet, P6SMB51AHM3_B/I pinout, P6SMB51AHM3_B/I application, or P6SMB51AHM3_B/I equivalent, this device is selected for robust ESD and surge protection where low-profile SMT placement, AEC-Q101 qualification, and stable clamping under repetitive transients are required.
Technical Context
The P6SMB51AHM3_B/I operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), enabling effective suppression of fast-rising transients from inductive switching or lightning-induced surges.
Thermally, it exhibits RθJA = 100 °C/W and RθJL = 20 °C/W, supporting operation up to TJ = +150 °C. The HM3 suffix confirms halogen-free, RoHS-compliant construction with AEC-Q101 qualification and J-STD-020 MSL Level 1 rating (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 48.5 V / 53.6 V at 1.0 mA test current - defines precise avalanche onset for reliable overvoltage triggering |
| VWM | 43.6 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 70.1 V at 8.6 A - clamped voltage during 600 W transient, limiting stress on downstream components |
| IPPM | 8.6 A (10/1000 µs waveform) - peak surge current capability without failure under standardized surge test |
| PPPM | 600 W - peak pulse power handling capacity, critical for surviving IEC 61000-4-5 level 4 surges |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - enables use in under-hood automotive and high-temperature industrial environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased avalanche terminal | Connected to protected line; conducts during overvoltage to shunt surge current to ground |
| Anode (unmarked end) | Reference/ground return path | Typically tied to system ground or low-impedance return plane to complete clamping path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 surge events up to level 4 without degradation |
| Glass passivated junction | Ensures stable VBR tolerance and long-term leakage performance across temperature and life |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance requirements for automotive and industrial OEM supply chains |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp spikes above 43.6 V. Use Value: Limits rail voltage to ≤70.1 V during 8.6 A surges, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected in parallel with sensor output to absorb sub-100 ns ESD pulses. Use Value: Ultra-low leakage (<1 µA) avoids loading sensitive 4–20 mA or 0–10 V outputs; fast response prevents latch-up. |
| Telecom DC Power Input Protection | Consumer Device USB Port Surge Suppression |
Use Scenario: Safeguarding PoE-powered equipment inputs from induced surges on long Ethernet runs. IC Role / Device Role / Timing Role: Primary clamping device on 48 V DC input before DC/DC converter stage. Use Value: 600 W rating handles multi-event surges; SMB footprint allows compact layout near connector. |
Use Scenario: Adding secondary surge protection on VBUS line of USB-C ports in portable devices. IC Role / Device Role / Timing Role: Standoff voltage (43.6 V) safely tolerates 20 V PD negotiation while clamping >51 V faults. Use Value: Low-profile SMB package fits tight board space; AEC-Q101 grade supports extended product lifecycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A-E3/5B | Same VBR range (48.5–53.6 V), but lower PPPM = 400 W and no AEC-Q101 qualification | Rated for commercial-grade industrial use only; not validated for automotive temperature cycling or humidity testing | Select when cost sensitivity outweighs automotive qualification and 600 W surge margin is unnecessary |
| 1.5SMC51A | Higher package thermal resistance (RθJA ≈ 120 °C/W), same VBR/VC, but SMC (DO-214AB) package is 2.5 mm wider | Requires larger PCB pad area; less suitable for dense automotive modules with strict height constraints | Choose only if existing SMC footprint is fixed and 600 W rating is sufficient |
Compared with SMAJ51A-E3/5B and 1.5SMC51A, the P6SMB51AHM3_B/I delivers higher surge robustness (600 W vs. 400 W), automotive-grade reliability (AEC-Q101), and compact SMB packaging - making it optimal for space-constrained, high-reliability applications where consistent clamping and long-term stability are mandatory.
Availability
P6SMB51AHM3_B/I is available at Aetrix Electronics and suitable for automotive control units, industrial sensor nodes, telecom power supplies, and consumer USB-C power delivery systems requiring stable component supply and full AEC-Q101 traceability.
Supply support for P6SMB51AHM3_B/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets high-energy transient suppression in automotive, industrial, and communications systems - engineered for repeatable clamping performance, low leakage, and compatibility with automated SMT assembly.
FAQ
What is the maximum clamping voltage of the P6SMB51AHM3_B/I under surge conditions?
The P6SMB51AHM3_B/I has a maximum clamping voltage (VC) of 70.1 V at 8.6 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that downstream components experience no more than 70.1 V during a 600 W transient event. The P6SMB51AHM3_B/I maintains this clamping performance across its qualified temperature range and lifetime.
Is the P6SMB51AHM3_B/I suitable for automotive applications?
Yes, the P6SMB51AHM3_B/I is AEC-Q101 qualified, as confirmed by its HM3_B/I ordering code. It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and surge endurance validation per automotive requirements. The P6SMB51AHM3_B/I is explicitly rated for under-hood and body-control module use where junction temperatures reach +150 °C and long-term reliability is critical.
How does the P6SMB51AHM3_B/I differ from the P6SMB51AHE3_B/I variant?
The P6SMB51AHM3_B/I uses halogen-free, RoHS-compliant molding compound and terminations, whereas the P6SMB51AHE3_B/I is RoHS-compliant but not halogen-free. Both share identical electrical specifications (VBR, VWM, VC, PPPM) and AEC-Q101 qualification. The P6SMB51AHM3_B/I meets stricter environmental mandates for halogen content in automotive and industrial supply chains.
What is the reverse leakage current of the P6SMB51AHM3_B/I at its stand-off voltage?
The P6SMB51AHM3_B/I exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated stand-off voltage (VWM = 43.6 V) and TA = 25 °C. This ultra-low leakage ensures minimal impact on high-impedance circuits such as sensor bias networks or precision reference paths. Leakage remains below 5 µA up to +125 °C per datasheet characterization.
Can the P6SMB51AHM3_B/I be used in bidirectional configurations?
No, the P6SMB51AHM3_B/I is a unidirectional TVS diode, as indicated by the "A" suffix and absence of "CA" in its part number. Bidirectional variants (e.g., P6SMB51CA) are required for AC-coupled or symmetrical surge protection. Using the P6SMB51AHM3_B/I in reverse-biased AC applications would result in forward conduction and potential failure. Always verify polarity marking (cathode band) during placement of the P6SMB51AHM3_B/I.
P6SMB51AHM3_B/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- 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)
P6SMB51AHM3_B/I FAQ
1.How can I place an order for P6SMB51AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51AHM3_B/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 P6SMB51AHM3_B/I reliable?
The price and inventory of P6SMB51AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB51AHM3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB51AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51AHM3_B/I?
P6SMB51AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51AHM3_B/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 P6SMB51AHM3_B/I?
For technical support, including P6SMB51AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51AHM3_B/I requirements.
6.How does Aetrix verify that P6SMB51AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB51AHM3_B/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 P6SMB51AHM3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB51AHM3_B/I?
All P6SMB51AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51AHM3_B/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 P6SMB51AHM3_B/I part is unused and in its original packaging.
Return procedure for P6SMB51AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51AHM3_B/I Tags
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