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Vishay General Semiconductor - Diodes Division P6SMB6.8CAHE3_B/I
- Part No.:
- P6SMB6.8CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB6.8CAHE3_B/I.pdf
- Description:
- 600W,6.8V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,584
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Product details
Overview
P6SMB6.8CAHE3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for clamping voltage transients on signal and power lines. It features a 6.8 V breakdown voltage (VBR), 600 W peak pulse power (10/1000 µs), and clamps to ≤10.5 V at 57.1 A peak pulse current - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the P6SMB6.8CAHE3_B/I datasheet, P6SMB6.8CAHE3_B/I pinout, P6SMB6.8CAHE3_B/I application, or P6SMB6.8CAHE3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMB (DO-214AA) package compatibility, and compliance with IEC 61000-4-2/4-4/4-5 transient immunity requirements.
Technical Context
This device operates as a voltage-clamping protector using an avalanche junction structure, responding in <1 ps to fast-rising transients. Its bidirectional symmetry enables identical clamping behavior in both polarities, eliminating polarity-sensitive layout constraints in AC-coupled or differential signal paths.
Thermal performance is defined by RθJA = 100 °C/W and RθJL = 20 °C/W, with maximum junction temperature rated at +150 °C. The device is qualified to AEC-Q101 and meets J-STD-020 MSL Level 1, supporting lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA test current - defines precise clamping onset threshold for bidirectional protection |
| VWM | 5.80 V - maximum continuous reverse working voltage before leakage exceeds 1000 µA |
| VC @ IPPM | ≤10.5 V at 57.1 A peak pulse - ensures downstream ICs (e.g., RS-485 transceivers, MCU GPIOs) remain below absolute maximum ratings during surge events |
| PPPM | 600 W (10/1000 µs waveform) - sustains high-energy lightning-induced surges per IEC 61000-4-5 Level 3 (1 kV source impedance) |
| IPPM | 57.1 A - peak surge current handling capacity under standardized unidirectional pulse, derated above 25 °C ambient |
| TJ max | +150 °C - enables operation in under-hood automotive environments and industrial enclosures without thermal shutdown |
| Package | SMB (DO-214AA) - 0.220" × 0.130" footprint compatible with automated SMT placement and IPC-7351B land patterns |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration with cathode/anode indistinguishable in layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as input/output for transient energy; no DC polarity dependency - simplifies PCB routing for AC or floating signals |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired terminal completing low-inductance clamping path; requires symmetric copper pad layout (0.2" × 0.2") per datasheet fig. 6 for rated PPPM |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces - supports PPAP documentation and long-term reliability under thermal cycling |
| 600 W peak pulse power | Withstands 10/1000 µs surges up to 57.1 A - meets IEC 61000-4-5 Level 3 (2 Ω source) for industrial Ethernet and CAN FD bus protection |
| Low clamping voltage ratio (VC/VBR ≈ 1.55) | Minimizes overvoltage stress on protected ICs - critical for 3.3 V or 5 V logic interfaces where margin above VDD is tight |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without moisture sensitivity concerns - eliminates baking requirement and reduces production cost |
| Glass passivated junction | Ensures stable leakage (<1000 µA at VWM) and long-term parameter stability across 15-year service life in humid environments |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
|
Use Scenario: Protecting LIN/CAN node transceivers and MEMS pressure sensors from load-dump and ISO 7637-2 pulses in vehicle body electronics. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, absorbing transients before they reach the PHY layer. Use Value: Prevents latch-up or permanent damage to 5 V tolerant transceivers during 12 V system load dump events (up to 40 V, 400 ms), enabled by VC ≤ 10.5 V and AEC-Q101 qualification. |
Use Scenario: Safeguarding RS-485 transceivers (e.g., MAX13487) against ESD and lightning-induced surges in factory automation networks. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting common-mode transients between A/B lines and ground, preserving signal integrity at 10 Mbps. Use Value: Maintains data integrity under IEC 61000-4-2 ±8 kV contact discharge and IEC 61000-4-5 1 kV surge due to VBR tolerance (±5%) and sub-100 ps response time. |
| Consumer USB Port Protection | Telecom DSL Line Interface |
|
Use Scenario: Shielding USB 2.0 D+/D− lines from human-body-model ESD in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Bidirectional suppressor placed inline with data lines, referenced to ground, leveraging symmetry for differential mode suppression. Use Value: Clamps ±15 kV HBM ESD pulses to <10.5 V within nanoseconds - prevents gate oxide rupture in USB PHYs while adding <0.5 pF parasitic capacitance. |
Use Scenario: Front-end surge protection for ADSL/VDSL line drivers exposed to induced surges on outdoor copper pairs. IC Role / Device Role / Timing Role: Primary clamping device bridging tip/ring to ground, coordinated with gas discharge tube (GDT) for staged protection. Use Value: Handles 600 W surge energy without degradation, enabling coordination with GDTs to limit let-through voltage to <150 V - compliant with ITU-T K.20/21. |
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 (6.45–7.14 V) and VC (10.5 V), but lower PPPM = 400 W; SMA package (smaller footprint, higher RθJA = 140 °C/W) | Preferred for space-constrained consumer PCBs where 400 W surge margin suffices; not AEC-Q101 qualified | Select when board area is critical and automotive qualification is unnecessary |
| 1.5KE6.8CA | Higher PPPM = 1500 W, axial DO-201 package; VBR = 6.45–7.14 V, VC = 10.5 V - identical clamping but through-hole mounting | Suitable for prototyping, high-surge legacy systems, or hybrid boards requiring mixed-technology assembly | Choose for manual assembly, high-reliability test fixtures, or where thermal mass of axial leads improves surge endurance |
Compared with SMAJ6.8CA, P6SMB6.8CAHE3_B/I offers 50% higher surge power and automotive qualification; versus 1.5KE6.8CA, it provides SMT compatibility and reduced board space at the cost of lower thermal mass - making it optimal for volume automotive and industrial SMT production.
Availability
P6SMB6.8CAHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 networks, consumer USB interface hardening, and telecom DSL line surge suppression requiring stable component supply and AEC-Q101 traceability.
Supply support for P6SMB6.8CAHE3_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 automotive-grade validation.
The P6SMB Series targets high-energy transient suppression in automotive, industrial, and telecom infrastructure - engineered for robustness under repetitive surge stress and extended temperature operation.
FAQ
What is the clamping voltage of P6SMB6.8CAHE3_B/I at its rated peak pulse current?
The P6SMB6.8CAHE3_B/I clamps to a maximum of 10.5 V at its rated peak pulse current of 57.1 A (10/1000 µs waveform). This value is guaranteed per the Vishay datasheet (Document Number: 88370, Rev. 09-Jan-2024) and reflects worst-case performance under standardized surge conditions - critical for ensuring protected ICs remain within safe operating voltage margins. The P6SMB6.8CAHE3_B/I achieves this with minimal overshoot due to its low incremental surge resistance.
Is P6SMB6.8CAHE3_B/I suitable for automotive applications?
Yes, P6SMB6.8CAHE3_B/I is AEC-Q101 qualified (indicated by the "HE3_B" suffix), fully tested for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock. It is approved for use in engine control units, body electronics, and ADAS sensor modules where transient immunity to ISO 7637-2 and IEC 61000-4-5 is required. The P6SMB6.8CAHE3_B/I also meets J-STD-020 MSL Level 1 for lead-free reflow compatibility.
What does the "CA" suffix mean in P6SMB6.8CAHE3_B/I?
The "CA" suffix in P6SMB6.8CAHE3_B/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P6SMB6.8A), the P6SMB6.8CAHE3_B/I has no polarity marking and functions identically regardless of signal direction, making it ideal for AC-coupled lines, differential buses (RS-485, CAN), and floating sensor outputs.
What is the maximum operating junction temperature for P6SMB6.8CAHE3_B/I?
The maximum operating junction temperature for P6SMB6.8CAHE3_B/I is +150 °C, as specified in the Vishay P6SMB datasheet. This rating enables reliable operation in under-hood automotive environments and sealed industrial enclosures. Derating begins above 25 °C ambient per Figure 2 in the datasheet, and thermal design must account for RθJA = 100 °C/W and RθJL = 20 °C/W to maintain safe junction temperatures during repetitive surge events.
How does the SMB (DO-214AA) package of P6SMB6.8CAHE3_B/I compare to SMA in size and thermal performance?
The SMB (DO-214AA) package of P6SMB6.8CAHE3_B/I measures 4.57 mm × 3.94 mm × 2.29 mm - larger than SMA (DO-214AC) by ~30% in footprint area, enabling higher surge energy handling (600 W vs. SMAJ's 400 W) and lower thermal resistance (RθJA = 100 °C/W vs. SMAJ's 140 °C/W). This makes the P6SMB6.8CAHE3_B/I better suited for high-reliability, high-power transient suppression where thermal margin and surge endurance are prioritized over minimal board area.
P6SMB6.8CAHE3_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)
P6SMB6.8CAHE3_B/I FAQ
1.How can I place an order for P6SMB6.8CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB6.8CAHE3_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 P6SMB6.8CAHE3_B/I reliable?
The price and inventory of P6SMB6.8CAHE3_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 P6SMB6.8CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB6.8CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB6.8CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB6.8CAHE3_B/I?
P6SMB6.8CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB6.8CAHE3_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 P6SMB6.8CAHE3_B/I?
For technical support, including P6SMB6.8CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB6.8CAHE3_B/I requirements.
6.How does Aetrix verify that P6SMB6.8CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB6.8CAHE3_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 P6SMB6.8CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB6.8CAHE3_B/I?
All P6SMB6.8CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB6.8CAHE3_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 P6SMB6.8CAHE3_B/I part is unused and in its original packaging.
Return procedure for P6SMB6.8CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB6.8CAHE3_B/I Tags
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