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Vishay General Semiconductor - Diodes Division P6SMB6.8CA-E3/5B
- Part No.:
- P6SMB6.8CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB6.8CA-E3/5B.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,655
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Product details
Overview
P6SMB6.8CA-E3/5B from Vishay General Semiconductor is a bidirectional 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 sensitive signal lines and MOSFET gates in automotive sensor interfaces and industrial control inputs against ESD and inductive switching transients.
For engineers reviewing the P6SMB6.8CA-E3/5B datasheet, P6SMB6.8CA-E3/5B pinout, P6SMB6.8CA-E3/5B application, or P6SMB6.8CA-E3/5B equivalent, this device delivers verified bidirectional clamping performance with AEC-Q101 qualification option, RoHS-compliant matte tin terminations, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive PCB assembly and surge-prone industrial I/O designs.
Technical Context
The P6SMB6.8CA-E3/5B operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping under repetitive 10/1000 μs pulses at 0.01% duty cycle.
Designed for surface-mount placement on 0.2" × 0.2" copper pads per terminal, it achieves thermal resistance RθJA = 100 °C/W and supports operating junction temperatures from –65 °C to +150 °C. The device meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA test current - defines precise voltage threshold where avalanche conduction begins in either direction |
| VWM | 5.80 V - maximum reverse stand-off voltage before leakage exceeds 1000 μA; sets safe operating margin below clamping onset |
| VC @ IPPM | 10.5 V at 57.1 A peak pulse current - actual clamped voltage seen by protected circuit during 600 W transient event |
| PPPM | 600 W - peak pulse power handling capability with 10/1000 μs waveform, enabling protection against IEC 61000-4-5 Level 3 surges |
| IPPM | 57.1 A - maximum non-repetitive peak pulse current supported, directly determining minimum series impedance required for compliance |
| TJ max | +150 °C - maximum junction temperature rating, allowing operation in under-hood automotive environments and sealed industrial enclosures |
| Package | SMB (DO-214AA) - standardized 2-pin SMD outline with 3.94 mm × 4.57 mm footprint and 2.20 mm height, compatible with automated pick-and-place |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One side of symmetrical PN junction; conducts when voltage at this terminal falls ≥ VBR below cathode potential |
| Cathode | Transient current entry (positive polarity) | Other side of symmetrical PN junction; conducts when voltage at this terminal rises ≥ VBR above anode potential |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN bus, sensor bridges) without polarity concerns |
| 600 W peak pulse power | Supports robust immunity to IEC 61000-4-5 combination wave surges up to 1 kV/500 A in 2 Ω source impedance configurations |
| Low clamping ratio (VC/VBR ≈ 1.55) | Minimizes overvoltage stress on downstream ICs - e.g., keeps protected 3.3 V logic inputs below 10.5 V during worst-case transients |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking, simplifying high-volume automotive PCB assembly logistics |
| AEC-Q101 qualification option | Available with HE3/HM3 suffixes for automotive-grade reliability validation - essential for ADAS sensor modules and body control units |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver pins and MEMS pressure sensor outputs from load-dump and ISO 7637-2 pulse 5a transients in engine bay modules. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point, shunting surge energy before it reaches signal conditioning ICs. Use Value: Maintains signal integrity under 100 V/500 ms load dump events while adding <1 pF capacitance - no impact on 250 kbps CAN timing budgets. |
Use Scenario: Safeguarding 4–20 mA current loop receiver inputs in factory-floor PLCs exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Primary overvoltage limiter on input terminals, coordinated with upstream fuse and series resistor to limit IPPM to 57.1 A. Use Value: Clamps induced transients to ≤10.5 V, preventing damage to precision op-amps and ADC front-ends rated for ±15 V absolute maximum. |
| Consumer IoT Power Supply Rail | Telecom Line Card Protection |
Use Scenario: Secondary-side transient suppression on 5 V USB-powered MCU rails in smart home hubs subjected to ESD and nearby lightning-induced coupling. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) voltage clamp across VDD and GND, triggered before internal IC ESD structures activate. Use Value: Limits ESD-induced overshoot to 10.5 V, well below 6 V absolute maximum rating of typical 32-bit ARM Cortex-M microcontrollers. |
Use Scenario: Front-end protection of Ethernet PHY differential pairs and auxiliary power lines in telecom access equipment deployed in lightning-prone regions. IC Role / Device Role / Timing Role: First-line defense against longitudinal surges on twisted-pair lines, working in concert with gas discharge tubes and common-mode chokes. Use Value: Withstands 600 W pulses without degradation, ensuring >100,000 surge cycles in carrier-class line cards per Telcordia GR-1089-CORE. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.8CA | Same VBR range (6.45–7.14 V) and VC (10.5 V), but lower PPPM = 400 W and smaller SMA package (DO-214AC) | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load-dump scenarios requiring 600 W | Select SMAJ6.8CA only for space-constrained consumer electronics where 400 W surge margin is sufficient. |
| 1.5SMC6.8CA | Higher PPPM = 1500 W, same VBR/VC, but larger SMC (DO-214AB) package and higher leakage (5 μA vs. 1000 μA) | Better suited for primary-level AC/DC input protection; overqualified for signal-line use due to higher capacitance (~150 pF) | Choose 1.5SMC6.8CA when protecting high-energy power rails; avoid for high-speed data lines due to excessive junction capacitance. |
Compared with SMAJ6.8CA and 1.5SMC6.8CA, the P6SMB6.8CA-E3/5B uniquely balances 600 W surge capacity, SMB footprint compatibility, and sub-10 pF capacitance - making it optimal for mid-tier industrial and automotive signal-line protection where board space and clamping precision are both critical.
Availability
P6SMB6.8CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and telecom line card protection requiring stable component supply, RoHS compliance, and AEC-Q101 traceability options.
Supply support for P6SMB6.8CA-E3/5B 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, power efficiency, and automotive-grade qualification.
The P6SMB Series was developed specifically for surface-mount transient suppression in space-constrained, high-surge environments - targeting automotive electronics, industrial controls, and communications infrastructure where consistent clamping and MSL-1 process compatibility are mandatory.
FAQ
What does the "CA" suffix mean in P6SMB6.8CA-E3/5B?
The "CA" suffix in P6SMB6.8CA-E3/5B denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression in both polarities, with no cathode band marking. This distinguishes it from unidirectional variants (e.g., P6SMB6.8A) that require correct polarity orientation during PCB layout. The P6SMB6.8CA-E3/5B is ideal for protecting AC-coupled or floating signal paths such as RS-485, CAN, or sensor bridge outputs where voltage polarity reversal is possible.
Is P6SMB6.8CA-E3/5B AEC-Q101 qualified?
The base P6SMB6.8CA-E3/5B is RoHS-compliant commercial-grade; however, Vishay offers AEC-Q101 qualified versions under ordering codes P6SMB6.8CAHE3_B and P6SMB6.8CAHM3_B (with "_B" revision suffix). These variants undergo extended stress testing per AEC-Q101 and are designated for automotive applications including body electronics and ADAS sensor interfaces. The P6SMB6.8CA-E3/5B itself is not AEC-Q101 qualified unless ordered with the HE3_B or HM3_B suffix.
What is the maximum clamping voltage of P6SMB6.8CA-E3/5B and how is it measured?
The maximum clamping voltage (VC) of P6SMB6.8CA-E3/5B is 10.5 V, measured at its peak pulse current (IPPM) of 57.1 A using a 10/1000 μs double-exponential waveform. This value represents the highest voltage the device allows across its terminals during a standardized surge event - a critical parameter for ensuring downstream ICs remain within their absolute maximum ratings. The P6SMB6.8CA-E3/5B achieves this low VC via optimized silicon geometry and low incremental resistance, resulting in a clamping ratio (VC/VBR) of approximately 1.55.
Can P6SMB6.8CA-E3/5B be used in place of a unidirectional TVS like P6SMB6.8A?
No - P6SMB6.8CA-E3/5B is strictly bidirectional and lacks polarity marking, while P6SMB6.8A is unidirectional with a cathode band. Substituting one for the other risks improper clamping behavior: a unidirectional device blocks reverse voltage until breakdown, whereas the P6SMB6.8CA-E3/5B conducts in both directions once VBR is exceeded. Use P6SMB6.8CA-E3/5B only where bidirectional protection is explicitly required, such as on differential or floating lines; never on DC-biased single-ended rails without verifying system-level polarity constraints.
What is the thermal resistance and power derating behavior of P6SMB6.8CA-E3/5B?
P6SMB6.8CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. Its 600 W peak pulse power rating applies only at TA = 25 °C and must be linearly derated above 25 °C - for example, at 85 °C ambient, maximum allowable PPPM drops to ~360 W per Vishay's Fig. 2 derating curve. Continuous power dissipation (PD) remains 5.0 W regardless of ambient, limited by steady-state thermal design.
P6SMB6.8CA-E3/5B 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB6.8CA-E3/5B FAQ
1.How can I place an order for P6SMB6.8CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB6.8CA-E3/5B 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 P6SMB6.8CA-E3/5B reliable?
The price and inventory of P6SMB6.8CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB6.8CA-E3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB6.8CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB6.8CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB6.8CA-E3/5B?
P6SMB6.8CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB6.8CA-E3/5B 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 P6SMB6.8CA-E3/5B?
For technical support, including P6SMB6.8CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB6.8CA-E3/5B requirements.
6.How does Aetrix verify that P6SMB6.8CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB6.8CA-E3/5B 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 P6SMB6.8CA-E3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB6.8CA-E3/5B?
All P6SMB6.8CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB6.8CA-E3/5B, 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 P6SMB6.8CA-E3/5B part is unused and in its original packaging.
Return procedure for P6SMB6.8CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB6.8CA-E3/5B Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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