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Vishay General Semiconductor - Diodes Division P6SMB68AHM3_B/I
- Part No.:
- P6SMB68AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB68AHM3_B/I.pdf
- Description:
- 600W,68V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,593
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Product details
Overview
P6SMB68AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, rated for 68 V breakdown voltage (VBR = 64.6–71.4 V at IT = 1.0 mA), 92.0 V maximum clamping voltage (VC) at 6.5 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 automotive and industrial power supplies.
For engineers reviewing the P6SMB68AHM3_B/I datasheet, P6SMB68AHM3_B/I pinout, P6SMB68AHM3_B/I application, or P6SMB68AHM3_B/I equivalent, this AEC-Q101 qualified, halogen-free, RoHS-compliant TVS offers verified clamping performance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive ECUs and industrial motor drives.
Technical Context
This unidirectional TVS operates by avalanche breakdown to clamp transient overvoltages above its stand-off voltage (VWM = 58.1 V) while maintaining low leakage (<1.0 µA). Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1.0 ns), enabling protection of sensitive 3.3 V/5 V logic interfaces without signal distortion.
The device is thermally optimized for surface-mount PCB layouts with 0.2" × 0.2" copper pads per terminal, delivering RθJA = 100 °C/W and RθJL = 20 °C/W. Its 150 °C maximum junction temperature and AEC-Q101 qualification confirm suitability for under-hood automotive environments and industrial control cabinets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at 1.0 mA test current - defines precise avalanche onset window for repeatable clamping behavior |
| VWM | 58.1 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 92.0 V at 6.5 A (10/1000 µs) - actual worst-case clamped voltage seen by protected circuit during surge |
| PPPM | 600 W - peak transient energy absorption capability without failure under standardized surge waveform |
| IFSM | 100 A (8.3 ms half-sine) - surge current rating for unidirectional forward conduction during fault conditions |
| TJ max | +150 °C - enables operation in engine bay or industrial enclosures without derating below ambient 125 °C |
| Package | SMB (DO-214AA) - industry-standard 2-pin SMD outline with 5.59 mm × 3.94 mm footprint and 2.20 mm height |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, matte tin-plated leads, MSL Level 1 (260 °C reflow peak), polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; carries full surge current during clamping |
| Cathode | Avalanche breakdown node / protected line connection | Connected to line being protected (e.g., 12 V rail, CAN_H); voltage referenced to anode during clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including engine control, body modules, and ADAS sensors |
| Halogen-free & RoHS-compliant | Meets IPC-1752A material declaration requirements and EU Directive 2011/65/EU |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surge events without degradation |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes overvoltage stress on downstream 75 V-rated MOSFETs and 100 V capacitors |
| Fast response time (<1 ns) | Engages before transient edges propagate into IC inputs, preventing latch-up or gate oxide damage |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed microcontroller power rails in vehicle body control modules against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND, clamping transients exceeding 58.1 V before they reach LDO input. Use Value: Limits voltage excursion to ≤92.0 V during 6.5 A surges, preserving 100 V-rated input capacitors and preventing brownout resets. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) from ESD and cable discharge events in factory automation sensors. IC Role / Device Role / Timing Role: TVS mounted at connector interface, shunting transients away from precision op-amp and ADC front-end. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) within <1 ns, maintaining signal integrity and avoiding ADC saturation or offset drift. |
| Telecom DC Power Input Protection | MOSFET Gate Driver Protection |
|
Use Scenario: Shielding PoE-powered switch port DC inputs from lightning-induced surges on outdoor Ethernet cables. IC Role / Device Role / Timing Role: Primary TVS on 48 V input rail upstream of DC/DC converter, absorbing up to 600 W transient energy. Use Value: Withstands IEC 61000-4-5 Combination Wave (10/700 µs) surges up to 4 kV without parametric shift or failure. |
Use Scenario: Preventing gate oxide rupture in high-side N-channel MOSFETs driven by isolated gate drivers in motor inverters. IC Role / Device Role / Timing Role: TVS connected between gate and source, clamping Miller-induced voltage spikes during fast dV/dt switching. Use Value: Limits gate-source voltage to ≤92.0 V during 100 V/ns transients, ensuring safe operation below 100 V VGS(max). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ68A-E3/5B | Same VBR range (64.6–71.4 V), but lower PPPM = 400 W and higher VC = 110 V at 3.7 A | Not AEC-Q101 qualified; limited to commercial-grade consumer/industrial use | Select when cost sensitivity outweighs automotive qualification and higher surge margin |
| 1.5SMC68AHE3_A/H | Same VBR, but SMC package (larger footprint, RθJA = 60 °C/W), PPPM = 1500 W | Requires PCB area increase (~2.5× SMB); suited for high-energy industrial surge zones | Choose when system-level surge testing exceeds 600 W and thermal management allows larger package |
Compared with SMAJ68A-E3/5B, P6SMB68AHM3_B/I delivers +50% peak power handling and automotive qualification; versus 1.5SMC68AHE3_A/H, it saves board space and reduces assembly cost while meeting most OEM surge thresholds.
Availability
P6SMB68AHM3_B/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power input stages requiring stable component supply with AEC-Q101 compliance and halogen-free materials.
Supply support for P6SMB68AHM3_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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with focus on reliability, efficiency, and application-specific performance.
The P6SMB Series targets robust transient suppression in space-constrained, high-reliability applications - especially automotive power systems and industrial automation where AEC-Q101 validation and consistent clamping are mandatory.
FAQ
What is the maximum clamping voltage of the P6SMB68AHM3_B/I under standard surge conditions?
The P6SMB68AHM3_B/I exhibits a maximum clamping voltage (VC) of 92.0 V when subjected to a 10/1000 µs waveform with a peak pulse current (IPPM) of 6.5 A. This value is measured per JEDEC standards and confirmed in the Vishay datasheet revision 09-Jan-2024. The P6SMB68AHM3_B/I maintains this clamping performance across its full operating temperature range (−65 °C to +150 °C), making it suitable for under-hood automotive deployment.
Is the P6SMB68AHM3_B/I qualified for automotive applications?
Yes, the P6SMB68AHM3_B/I is AEC-Q101 qualified, as indicated by the "HM3_B" suffix per Vishay's ordering nomenclature. It meets stress test requirements for temperature cycling, humidity bias, and mechanical shock applicable to discrete semiconductor devices in automotive electronics. The P6SMB68AHM3_B/I is explicitly approved for use in engine control units, body electronics, and ADAS subsystems where transient immunity and long-term reliability are critical.
What does the "_B/I" suffix mean in P6SMB68AHM3_B/I?
The "_B" denotes AEC-Q101 qualification for the P6SMB68AHM3_B/I series (applicable to 6.8 V–220 V variants), while "_I" specifies packaging in 13-inch diameter plastic tape and reel with 3200 units per reel. This format supports high-volume SMT assembly and satisfies Vishay's standard logistics coding. The P6SMB68AHM3_B/I is halogen-free, RoHS-compliant, and rated for MSL Level 1 handling - all verified in the official Vishay document 88370.
How does the P6SMB68AHM3_B/I compare to bidirectional TVS diodes like P6SMB68CA?
The P6SMB68AHM3_B/I is unidirectional and features a cathode band for polarity identification, whereas P6SMB68CA is bidirectional with no polarity marking and symmetric clamping in both directions. The P6SMB68AHM3_B/I offers lower leakage (<1.0 µA at 58.1 V) and is preferred for DC rail protection; P6SMB68CA suits AC-coupled or differential signal lines. Both share identical SMB package, 600 W rating, and AEC-Q101 qualification when ordered with HM3_B suffix.
What is the thermal resistance of the P6SMB68AHM3_B/I in standard PCB layout?
The P6SMB68AHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay's test condition in document 88370. Its junction-to-lead resistance (RθJL) is 20 °C/W. These values enable reliable operation at full 600 W surge rating only with adequate copper pour; derating is required for smaller pads or elevated ambient temperatures - a key design consideration for the P6SMB68AHM3_B/I in compact automotive modules.
P6SMB68AHM3_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):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 6.5A
- 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)
P6SMB68AHM3_B/I FAQ
1.How can I place an order for P6SMB68AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB68AHM3_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 P6SMB68AHM3_B/I reliable?
The price and inventory of P6SMB68AHM3_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 P6SMB68AHM3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB68AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB68AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB68AHM3_B/I?
P6SMB68AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB68AHM3_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 P6SMB68AHM3_B/I?
For technical support, including P6SMB68AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB68AHM3_B/I requirements.
6.How does Aetrix verify that P6SMB68AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB68AHM3_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 P6SMB68AHM3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB68AHM3_B/I?
All P6SMB68AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB68AHM3_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 P6SMB68AHM3_B/I part is unused and in its original packaging.
Return procedure for P6SMB68AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB68AHM3_B/I Tags
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Diodes Incorporated
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