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Vishay General Semiconductor - Diodes Division P6SMB6.8AHM3_A/H
- Part No.:
- P6SMB6.8AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB6.8AHM3_A/H.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,425
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Product details
Overview
P6SMB6.8AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 600 W peak pulse power (10/1000 μs), 6.8 V breakdown voltage (VBR = 6.45–7.14 V at IT = 10 mA), and 10.5 V maximum clamping voltage (VC) at IPPM. It protects low-voltage logic circuits, USB interfaces, and automotive sensor signal lines against ESD and inductive switching transients.
For engineers reviewing the P6SMB6.8AHM3_A/H datasheet, P6SMB6.8AHM3_A/H pinout, P6SMB6.8AHM3_A/H application, or P6SMB6.8AHM3_A/H equivalent, key selection criteria include clamping voltage margin relative to IC VCC, unidirectional polarity alignment with DC-biased lines, AEC-Q101 qualification status, and SMB footprint compatibility with automated SMT assembly.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (>1000 µA leakage at 5.8 V), but triggers into low-impedance conduction when transient voltage exceeds its 6.45–7.14 V breakdown range. Its glass-passivated junction ensures stable VBR tolerance and fast response (<1 ns).
Designed for PCB-level surge immunity per IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT), it delivers 57.1 A peak pulse current (IPPM) while maintaining ≤10.5 V clamping - critical for safeguarding 5 V and 3.3 V microcontrollers, CAN transceivers, and analog front-ends without overvoltage stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 6.45–7.14 V at 10 mA test current - defines precise turn-on threshold for transient suppression |
| Stand-off Voltage VWM | 5.80 V - maximum continuous reverse voltage before leakage exceeds 1000 µA; sets safe operating margin below VCC |
| Clamping Voltage VC | 10.5 V at 57.1 A peak pulse - limits transient voltage seen by protected IC, enabling robust 5 V system design |
| Peak Pulse Power PPPM | 600 W (10/1000 µs waveform) - supports high-energy surge events common in automotive load-dump and industrial switching |
| Package | SMB (DO-214AA) - standardized 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint and J-STD-020 MSL Level 1 rating |
| AEC-Q101 Qualified | Yes - certified for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per AEC standard |
| Thermal Resistance RθJA | 100 °C/W - enables thermal design with standard 0.2" × 0.2" copper pads; derating required above 25 °C ambient |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional configuration with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to circuit ground or lowest potential rail; forms return path during clamping |
| Cathode | Protected line input | Connected to signal/power line being protected; voltage clamping occurs between cathode and anode |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients from relay coil decay or motor commutation without failure |
| 10.5 V clamping at 57.1 A | Ensures downstream 5 V logic remains within absolute maximum ratings during surge events |
| Glass-passivated junction | Provides stable VBR over temperature and lifetime, minimizing drift in automotive environments |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control units, body electronics, and ADAS sensors |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
Applications
| Automotive Sensor Protection | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Protecting LIN bus sensors and analog output sensors (e.g., pressure, temperature) from battery load dump and alternator ripple. IC Role / Device Role / Timing Role: Shunt TVS placed between sensor signal line and chassis ground, clamping transients before they reach ADC input or op-amp buffer. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump) with ≤10.5 V clamping, preventing latch-up in 5 V sensor interface ICs. |
Use Scenario: Safeguarding USB D+ and D− lines in host/device ports against ESD events per IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Unidirectional TVS on each data line referenced to ground, preserving signal rise/fall times due to low capacitance. Use Value: Clamps ESD-induced overshoot to <10.5 V while adding <0.5 pF parasitic capacitance - no USB 2.0 timing violation. |
| Industrial PLC I/O Protection | DC-DC Converter Input Protection |
Use Scenario: Shielding 24 V digital input modules from inductive kickback when solenoids or relays de-energize. IC Role / Device Role / Timing Role: TVS connected across input terminals to absorb 600 W surges, limiting voltage seen by optocoupler input stage. Use Value: Withstands repetitive 10/1000 µs transients at 0.01% duty cycle, ensuring long-term reliability in factory automation systems. |
Use Scenario: Preventing damage to buck converter controllers from input voltage spikes caused by hot-plug or upstream switching noise. IC Role / Device Role / Timing Role: TVS placed at converter input capacitor node, clamping surges before they stress MOSFET gate oxide or controller supply pins. Use Value: 5.8 V stand-off allows operation with 5 V input rails; 10.5 V clamping prevents overvoltage on 6 V-rated controller ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.8A-E3/52 | Same SMB package, identical VBR (6.45–7.14 V), but lower PPPM (400 W) and higher VC (11.5 V) | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost sensitivity outweighs automotive qualification and 600 W surge headroom |
| 1.5SMC6.8A | Higher-power SMC package (7.11 mm × 6.22 mm), same VBR/VC, 1500 W PPPM | Requires larger PCB area; suited for primary-level protection in power supplies | Choose for front-end surge suppression where board space permits and higher energy handling is mandatory |
Compared with SMAJ6.8A-E3/52, P6SMB6.8AHM3_A/H provides 50% higher surge power and automotive qualification; versus 1.5SMC6.8A, it offers identical electrical performance in a 40% smaller footprint - ideal for space-constrained automotive ECUs and portable electronics.
Availability
P6SMB6.8AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and consumer USB interface designs requiring stable component supply, AEC-Q101 compliance, and consistent SMB footprint availability.
Supply support for P6SMB6.8AHM3_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, and protection devices with emphasis on reliability, efficiency, and automotive-grade validation.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and computing applications - engineered for robustness under harsh thermal and electrical stress while maintaining tight parametric control.
FAQ
What is the exact breakdown voltage range of the P6SMB6.8AHM3_A/H?
The P6SMB6.8AHM3_A/H has a guaranteed breakdown voltage (VBR) range of 6.45 V to 7.14 V at a test current of 10 mA, measured per ANSI/IEEE C62.35. This tight 10% tolerance ensures predictable turn-on behavior in precision 5 V protection schemes and eliminates ambiguity during circuit validation. The P6SMB6.8AHM3_A/H maintains this specification across its full operating temperature range of –65 °C to +150 °C.
Is the P6SMB6.8AHM3_A/H suitable for automotive applications?
Yes, the P6SMB6.8AHM3_A/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's P6SMB datasheet revision 09-Jan-2024. It undergoes stress testing for temperature cycling, humidity, mechanical shock, and high-temperature operating life - making it appropriate for engine control units, body control modules, and ADAS sensor interfaces. The P6SMB6.8AHM3_A/H meets automotive requirements without derating for ambient temperatures up to 125 °C.
What is the maximum clamping voltage of the P6SMB6.8AHM3_A/H under surge conditions?
The P6SMB6.8AHM3_A/H exhibits a maximum clamping voltage (VC) of 10.5 V at its rated peak pulse current of 57.1 A (10/1000 µs waveform). This value is measured under standardized test conditions with 0.2" × 0.2" copper pads and represents the worst-case voltage imposed on protected circuitry during a full-energy transient. The P6SMB6.8AHM3_A/H's low VC ensures compatibility with 5 V logic families and prevents overstress of downstream ICs.
Does the P6SMB6.8AHM3_A/H have polarity markings, and how is it oriented on the PCB?
Yes, the P6SMB6.8AHM3_A/H features a visible cathode band on the SMB package body, indicating the cathode terminal. During PCB layout, the cathode must be connected to the line being protected (e.g., signal or power rail), while the anode connects to ground or the reference potential. Incorrect orientation renders the device nonfunctional for unidirectional suppression. The P6SMB6.8AHM3_A/H's polarity marking aligns with JEDEC DO-214AA standards and is verified in Vishay's package outline drawing.
How does the P6SMB6.8AHM3_A/H compare to bidirectional TVS diodes like P6SMB6.8CA?
The P6SMB6.8AHM3_A/H is unidirectional and optimized for DC-biased lines such as power rails and single-ended signals, offering lower leakage and tighter VBR tolerance than bidirectional variants. In contrast, P6SMB6.8CA supports AC-coupled or floating lines but exhibits higher leakage and dual-threshold behavior. The P6SMB6.8AHM3_A/H should not be substituted for P6SMB6.8CA in applications requiring symmetrical clamping - its design intent is explicitly for polarized protection networks.
P6SMB6.8AHM3_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):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 57.1A
- 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)
P6SMB6.8AHM3_A/H FAQ
1.How can I place an order for P6SMB6.8AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB6.8AHM3_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 P6SMB6.8AHM3_A/H reliable?
The price and inventory of P6SMB6.8AHM3_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 P6SMB6.8AHM3_A/H is usually 5 days.
3.What payment methods are accepted for P6SMB6.8AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB6.8AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB6.8AHM3_A/H?
P6SMB6.8AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB6.8AHM3_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 P6SMB6.8AHM3_A/H?
For technical support, including P6SMB6.8AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB6.8AHM3_A/H requirements.
6.How does Aetrix verify that P6SMB6.8AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P6SMB6.8AHM3_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 P6SMB6.8AHM3_A/H meets industry standards.
7.What is the process for return or replacement of P6SMB6.8AHM3_A/H?
All P6SMB6.8AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB6.8AHM3_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 P6SMB6.8AHM3_A/H part is unused and in its original packaging.
Return procedure for P6SMB6.8AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB6.8AHM3_A/H Tags
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