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Vishay General Semiconductor - Diodes Division P6SMB6.8CAHM3_B/I
- Part No.:
- P6SMB6.8CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB6.8CAHM3_B/I.pdf
- Description:
- 600W,6.8V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,657
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Product details
Overview
P6SMB6.8CAHM3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust ESD and surge protection on signal and power lines. It features a 6.8 V breakdown voltage (VBR = 6.45–7.14 V at 10 mA), 600 W peak pulse power (10/1000 μs), and clamps transients to ≤10.5 V at 57.1 A, making it suitable for protecting automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the P6SMB6.8CAHM3_B/I datasheet, P6SMB6.8CAHM3_B/I pinout, P6SMB6.8CAHM3_B/I application, or P6SMB6.8CAHM3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMB (DO-214AA) package compatibility, and low clamping voltage under high-surge conditions.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1000 μA at 5.8 V).
Designed for transient suppression per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive load dump), it delivers fast response time (<1 ns) and low dynamic impedance, with thermal resistance RθJA = 100 °C/W on standard 0.2" × 0.2" copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA - defines precise clamping onset threshold for reliable overvoltage detection |
| VWM | 5.8 V - maximum continuous reverse operating voltage before leakage exceeds 1000 μA |
| VC @ IPPM | 10.5 V at 57.1 A - peak clamped voltage during 600 W transient, limiting stress on downstream ICs |
| PPPM | 600 W - peak pulse power handling with 10/1000 μs waveform, supporting repetitive surge events at 0.01% duty cycle |
| IPPM | 57.1 A - maximum non-repetitive surge current capability under standardized test conditions |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, with matte tin-plated leads solderable per J-STD-002. No polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | One terminal of symmetrical PN junction; conducts during positive or negative overvoltage events |
| Cathode | Transient current entry (reverse bias) | Second terminal of symmetrical PN junction; identical electrical role to Anode in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating signal lines without external polarity management |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| 600 W peak pulse power | Withstands severe transients such as ISO 7637-2 Pulse 1/2a/5a in 12 V vehicle systems |
| Low clamping voltage (10.5 V) | Keeps protected circuitry below safe operating limits for 5 V and 3.3 V logic interfaces |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in passenger vehicles. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching MCU or transceiver. Use Value: Maintains signal integrity during ISO 7637-2 Pulse 5a (load dump up to 60 V) while clamping to 10.5 V, preventing latch-up in 5 V sensor signal chains. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges and lightning-induced transients. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on 24 V DC input channels, paired with series current-limiting resistor. Use Value: Absorbs 600 W surges per IEC 61000-4-4 Level 4 (4 kV EFT), reducing failure rate in factory-floor automation equipment. |
| Consumer USB Port Protection | Telecom Line Interface |
Use Scenario: Shielding USB 2.0 data lines (D+/D−) from human-body-model ESD events in portable devices. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed adjacent to USB connector to minimize signal distortion. Use Value: Clamps ±8 kV contact discharge (IEC 61000-4-2) within <1 ns while adding <0.5 pF parasitic capacitance, preserving signal rise time. |
Use Scenario: Protecting Ethernet PHY or RS-485 transceivers connected to outdoor cabling exposed to induced lightning surges. IC Role / Device Role / Timing Role: Secondary-level TVS on twisted-pair line side, downstream of gas discharge tube (GDT) primary protection. Use Value: Limits residual voltage to ≤10.5 V after GDT crowbar action, ensuring transceiver survival under 10/1000 μs 1 kV surge waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.8CA | Same VBR range and SMB package, but rated for 400 W PPPM (vs. 600 W); no AEC-Q101 option | Limited to commercial-grade industrial or consumer use; not qualified for automotive under-hood deployment | Select when cost sensitivity outweighs automotive qualification and 600 W surge margin is unnecessary |
| 1.5SMC6.8CA | Higher-power SMC package (1500 W PPPM), larger footprint (7.11 × 6.22 mm vs. 4.57 × 3.94 mm), same VBR/VC | Used where PCB space permits and higher surge immunity is required, e.g., power supply inputs or telecom base stations | Choose when system-level surge requirements exceed 600 W and layout allows larger SMC footprint |
Compared with SMAJ6.8CA and 1.5SMC6.8CA, P6SMB6.8CAHM3_B/I uniquely combines AEC-Q101 qualification, 600 W surge rating, and compact SMB packaging-enabling automotive-grade protection without board area penalty or derating compromises.
Availability
P6SMB6.8CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer USB port protection, and telecom line interface designs requiring stable component supply and long-term lifecycle support.
Supply support for P6SMB6.8CAHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and communications systems, delivering AEC-Q101-qualified TVS diodes with optimized clamping and package scalability across voltage grades.
FAQ
What does the "CA" suffix indicate in P6SMB6.8CAHM3_B/I?
The "CA" suffix denotes a bidirectional configuration: the P6SMB6.8CAHM3_B/I functions identically in both polarities, making it ideal for protecting AC-coupled signals, differential buses (e.g., CAN, RS-485), or ungrounded sensor outputs. Unlike unidirectional variants (e.g., P6SMB6.8A), it has no cathode band marking and exhibits matched VBR and VC in either direction. This symmetry is confirmed in the Vishay P6SMB datasheet Section 1, "Devices for Bidirectional Applications."
Is P6SMB6.8CAHM3_B/I suitable for automotive under-hood applications?
Yes, P6SMB6.8CAHM3_B/I is AEC-Q101 qualified and rated for TJ = –65 °C to +150 °C, meeting requirements for engine control, transmission, and ADAS sensor modules. Its halogen-free, RoHS-compliant HM3 construction and MSL Level 1 rating ensure compatibility with automotive reflow processes and long-term reliability in high-temperature, high-vibration environments. The "_B" suffix explicitly indicates AEC-Q101 qualification per Vishay's ordering information table.
How does the clamping voltage of P6SMB6.8CAHM3_B/I compare to its standoff voltage?
P6SMB6.8CAHM3_B/I has a standoff voltage (VWM) of 5.8 V and a maximum clamping voltage (VC) of 10.5 V at 57.1 A. This 4.7 V headroom ensures that normal 5 V or 3.3 V system operation remains unaffected by leakage (<1000 μA), while guaranteeing robust protection during transients-clamping well below typical IC absolute maximum ratings (e.g., 16 V for many 5 V transceivers). The ratio VC/VWM ≈ 1.81 reflects high surge-handling efficiency.
What is the significance of the "_B/I" suffix in P6SMB6.8CAHM3_B/I?
The "_B" denotes AEC-Q101 qualification for the P6SMB6.8CA voltage grade; the "/I" specifies packaging in 13-inch plastic tape and reel (3200 units per reel), per Vishay's ordering information table. This format enables high-volume automated assembly and supports traceability requirements for automotive Tier 1 suppliers. The "HM3" portion confirms halogen-free, RoHS-compliant construction with JESD 201 Class 2 whisker resistance.
Can P6SMB6.8CAHM3_B/I be used in place of unidirectional TVS diodes like P6SMB6.8AHM3_B/I?
No-P6SMB6.8CAHM3_B/I is bidirectional and lacks polarity marking, whereas P6SMB6.8AHM3_B/I is unidirectional with a cathode band. Substituting them requires verifying circuit topology: bidirectional use is mandatory for AC or floating lines, while unidirectional types are needed for DC-biased rails where reverse conduction must be blocked. The datasheet explicitly states "for unidirectional types the band denotes cathode end, no marking on bidirectional types," confirming functional incompatibility without redesign.
P6SMB6.8CAHM3_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:
- -
- Bidirectional Channels:
- 1
- 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)
P6SMB6.8CAHM3_B/I FAQ
1.How can I place an order for P6SMB6.8CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB6.8CAHM3_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 P6SMB6.8CAHM3_B/I reliable?
The price and inventory of P6SMB6.8CAHM3_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 P6SMB6.8CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB6.8CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB6.8CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB6.8CAHM3_B/I?
P6SMB6.8CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB6.8CAHM3_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 P6SMB6.8CAHM3_B/I?
For technical support, including P6SMB6.8CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB6.8CAHM3_B/I requirements.
6.How does Aetrix verify that P6SMB6.8CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB6.8CAHM3_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 P6SMB6.8CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB6.8CAHM3_B/I?
All P6SMB6.8CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB6.8CAHM3_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 P6SMB6.8CAHM3_B/I part is unused and in its original packaging.
Return procedure for P6SMB6.8CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB6.8CAHM3_B/I Tags
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