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Vishay General Semiconductor - Diodes Division SM6T22CAHE3_B/H
- Part No.:
- SM6T22CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22CAHE3_B/H.pdf
- Description:
- 600W,22V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,266
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Product details
Overview
SM6T22CAHE3_B/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, rated for 600 W peak pulse power (10/1000 μs), 22 V breakdown voltage (VBR = 20.9–23.1 V at IT = 1.0 mA), and 30.6 V maximum clamping voltage (VC) at IPPM. It protects signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SM6T22CAHE3_B/H datasheet, SM6T22CAHE3_B/H pinout, SM6T22CAHE3_B/H application, or SM6T22CAHE3_B/H equivalent, key selection factors include bidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low inductance, and RoHS-compliant matte tin terminals solderable per J-STD-002.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical VBR, VWM, and VC specifications in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior under repetitive surge stress.
Designed for surface-mount automated placement, it features MSL Level 1 moisture sensitivity and withstands 260 °C lead-free reflow. Thermal resistance is RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling reliable operation up to TJ = 150 °C with proper PCB copper pad layout (0.2" × 0.2").
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at IT = 1.0 mA - defines precise voltage threshold where clamping initiates in both directions |
| VWM | 18.8 V - maximum continuous reverse stand-off voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 30.6 V at 20.0 A (10/1000 μs) - clamping voltage during worst-case surge, limiting protected circuit stress |
| PPPM | 600 W - peak pulse power handling capability under standardized 10/1000 μs waveform |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, requiring minimum 5.0 mm × 5.0 mm copper pads per terminal |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode band absent per bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | One terminal of symmetrical P-N junction; conducts during positive voltage excursion relative to other terminal |
| Cathode | Transient current entry (negative half-cycle) | Second terminal of symmetrical P-N junction; conducts during negative voltage excursion relative to other terminal |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM performance in both polarities - eliminates need for polarity-aware layout in differential or AC-coupled lines |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD - supports deployment in engine control, ADAS, and body electronics |
| Low-inductance SMB package | Minimizes voltage overshoot during fast transients (<1 ns rise time) - critical for protecting high-speed sensor interfaces like CAN FD or LIN |
| Glass-passivated junction | Stable VBR tolerance (±5%) and low leakage (<1.0 μA at VWM) over lifetime - ensures long-term protection integrity in industrial environments |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp absorbing ±200 V transients without polarity concern. Use Value: Prevents latch-up or gate oxide damage in downstream op-amps and ADC inputs while maintaining signal fidelity below 18.8 V. | Use Scenario: Shielding 24 V digital input channels on programmable logic controllers from relay coil flyback and ESD events. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at connector interface before optocoupler input stage. Use Value: Limits transient voltage to ≤30.6 V within 1 ns, ensuring optocoupler CMTI remains intact and preventing false triggering. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Safeguarding RS-485 transceiver bus lines in outdoor network equipment subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Symmetrical clamping element on differential pair, referenced to local ground. Use Value: Maintains common-mode rejection by clamping both lines equally, avoiding data corruption during 600 W surge events. | Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, blenders). IC Role / Device Role / Timing Role: Low-inductance TVS mounted directly across motor terminals to absorb inductive kickback. Use Value: Reduces radiated emissions by limiting dV/dt, helping meet CISPR 14-1 Class B limits without added filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22CA | 400 W PPPM, same VBR/VC, SMA package (larger RθJA = 140 °C/W) | Limited to lower-energy transients; less suitable for automotive AEC-Q101 systems | Select when cost sensitivity outweighs power rating and qualification requirements |
| 1.5KE22CA | 1500 W PPPM, through-hole DO-201 package, higher VC = 33.2 V | Requires PCB real estate and wave-solder process; not SMT-compatible | Choose for legacy designs needing higher surge margin and no reflow constraints |
Compared with SMAJ22CA and 1.5KE22CA, SM6T22CAHE3_B/H delivers optimal balance of 600 W surge capacity, AEC-Q101 compliance, SMB footprint, and low-clamp performance - making it the preferred choice for new automotive and industrial SMT designs demanding reliability and space efficiency.
Availability
SM6T22CAHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line interface applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SM6T22CAHE3_B/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, MOSFETs, and protection devices with emphasis on high-reliability and automotive-grade solutions.
The SM6T Series is engineered specifically for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where bidirectional clamping, AEC-Q101 qualification, and compact SMB packaging are mandatory.
FAQ
What does the "CA" suffix indicate in SM6T22CAHE3_B/H?
The "CA" suffix denotes a bidirectional configuration - meaning SM6T22CAHE3_B/H provides symmetrical transient suppression in both polarities, unlike unidirectional variants (e.g., SM6T22A). This eliminates polarity marking and simplifies layout for AC-coupled or differential signal lines, and is confirmed in Vishay's SM6T datasheet revision 09-Jan-2024, section "DEVICES FOR BIDIRECTION APPLICATIONS".
Is SM6T22CAHE3_B/H qualified for automotive applications?
Yes, SM6T22CAHE3_B/H is AEC-Q101 qualified, as indicated by the "HE3" suffix in its ordering code. This certification covers stress tests including temperature cycling, highly accelerated life testing (HALT), and ESD robustness - validating its suitability for under-hood and chassis-mounted automotive electronics per Vishay's SM6T datasheet page 1 and ordering information table.
What is the maximum clamping voltage of SM6T22CAHE3_B/H during a 10/1000 μs surge?
The maximum clamping voltage (VC) of SM6T22CAHE3_B/H is 30.6 V at IPPM = 20.0 A under a 10/1000 μs waveform, per the Electrical Characteristics table on page 2 of the Vishay SM6T datasheet (Doc. #88385). This value ensures downstream ICs remain below absolute maximum ratings during standardized surge events.
Does SM6T22CAHE3_B/H have a polarity marking on the package?
No, SM6T22CAHE3_B/H has no polarity marking because it is a bidirectional TVS diode. As stated in the Mechanical Data section of the Vishay SM6T datasheet: "no marking on bidirectional types". The SMB (DO-214AA) case is symmetrical, and both terminals function identically regardless of voltage polarity.
What is the thermal resistance from junction to ambient for SM6T22CAHE3_B/H?
The typical thermal resistance from junction to ambient (RθJA) for SM6T22CAHE3_B/H is 100 °C/W, measured with 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per the Thermal Characteristics table on page 2 of the Vishay SM6T datasheet. This value assumes standard JEDEC test conditions and guides PCB thermal design for sustained power dissipation.
SM6T22CAHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 20A
- 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)
SM6T22CAHE3_B/H FAQ
1.How can I place an order for SM6T22CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22CAHE3_B/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 SM6T22CAHE3_B/H reliable?
The price and inventory of SM6T22CAHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T22CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SM6T22CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22CAHE3_B/H?
SM6T22CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22CAHE3_B/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 SM6T22CAHE3_B/H?
For technical support, including SM6T22CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22CAHE3_B/H requirements.
6.How does Aetrix verify that SM6T22CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SM6T22CAHE3_B/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 SM6T22CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SM6T22CAHE3_B/H?
All SM6T22CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22CAHE3_B/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 SM6T22CAHE3_B/H part is unused and in its original packaging.
Return procedure for SM6T22CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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