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Vishay General Semiconductor - Diodes Division SM6T22CAHM3_B/H
- Part No.:
- SM6T22CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22CAHM3_B/H.pdf
- Description:
- 600W,22V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,150
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Product details
Overview
SM6T22CAHM3_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 automotive sensor signal lines against ESD and inductive switching transients.
For engineers reviewing the SM6T22CAHM3_B/H datasheet, SM6T22CAHM3_B/H pinout, SM6T22CAHM3_B/H application, or SM6T22CAHM3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and SMB footprint compatibility with high-reliability automotive PCB layouts.
Technical Context
This device operates as a bidirectional voltage-clamping protector with symmetrical avalanche behavior in both polarities, enabling robust surge suppression on AC-coupled or differential signal paths without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 μA at VWM = 18.8 V).
Designed for surface-mount automated assembly, it meets J-STD-020 MSL Level 1 (260 °C peak reflow) and delivers 100 °C/W junction-to-ambient thermal resistance on standard 5.0 mm × 5.0 mm copper pads - critical for sustained transient energy dissipation in compact automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1.0 mA - defines precise clamping onset threshold for bidirectional overvoltage events |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 30.6 V at 20.0 A (10/1000 μs) - limits downstream IC voltage stress during 600 W transient surges |
| PPPM | 600 W - peak pulse power handling per industry-standard 10/1000 μs waveform |
| TJ max | +150 °C - enables operation in under-hood automotive environments |
| Package | SMB (DO-214AA) - standardized 2-pin SMT outline with 0.220" x 0.205" footprint and 0.086" height |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
SMB (DO-214AA) surface-mount package with two unmarked terminals; bidirectional construction means no cathode/anode polarity marking required. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as current entry point during positive or negative transients - symmetric conduction path |
| Terminal 2 | Cathode / Anode (bidirectional) | Paired terminal completing low-inductance clamping loop; no polarity dependency in layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN FD, LIN), or ungrounded sensor outputs without polarity constraints |
| 600 W peak pulse power | Withstands ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 4 surges without degradation when mounted per recommended pad layout |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive use including 1000-cycle temperature cycling (-40 °C to +125 °C) and 1000 h HTRB at 150 °C |
| Halogen-free & RoHS-compliant | Meets automotive material compliance requirements (JESD201 Class 2 whisker resistance, UL 94 V-0 molding compound) |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes voltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs or MCUs |
Applications
| Automotive Sensor Protection | CAN FD Bus Protection |
|---|---|
Use Scenario: Protecting analog output pins of pressure, temperature, or position sensors in engine control units exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional voltage clamp limiting transient excursions to ≤30.6 V during 10/1000 μs surges up to 20 A. Use Value: Prevents sensor IC damage while maintaining signal integrity across -40 °C to +125 °C ambient range. | Use Scenario: Safeguarding CAN FD transceiver I/O pins against ESD (IEC 61000-4-2 ±15 kV) and fast transients (ISO 16750-2) in ADAS domain controllers. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF), symmetrical clamping element placed directly at connector interface. Use Value: Maintains signal edge fidelity at 5 Mbps data rates while suppressing >600 W surges without adding ground-loop paths. |
| Industrial PLC I/O Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding 24 V DC digital input channels in programmable logic controllers from field-wiring induced transients during relay switching. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing repetitive 10/1000 μs pulses up to 600 W without derating below 25 °C ambient. Use Value: Eliminates need for external series impedance or RC filters, reducing BOM count and board space. | Use Scenario: Protecting microcontroller GPIOs driving brushed DC motor H-bridges in smart home appliances subject to commutation spikes. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) clamping device placed adjacent to motor driver IC supply pins. Use Value: Prevents MCU reset or brown-out during repeated 100 A inrush events by limiting VCC rail overshoot to <31 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22CA | Same VBR range (20.9–23.1 V) but lower PPPM = 400 W; SMA package (smaller thermal mass) | Limited to lower-energy transients (e.g., IEC 61000-4-2 only); unsuitable for ISO 7637-2 Pulse 5a load dump | Select when space-constrained and surge energy is limited to <400 W |
| 1.5KE22CA | Higher PPPM = 1500 W but axial DO-15 package; slower response due to higher parasitic inductance | Not suitable for high-speed signal lines or automated SMT assembly; requires through-hole mounting | Select only for legacy through-hole designs requiring >600 W clamping |
Compared with SMAJ22CA and 1.5KE22CA, SM6T22CAHM3_B/H uniquely combines AEC-Q101 qualification, SMB SMT compatibility, 600 W capability, and halogen-free construction - making it the preferred choice for new automotive and industrial SMT designs requiring certified reliability and process compatibility.
Availability
SM6T22CAHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN FD bus nodes, industrial PLC I/O modules, and consumer appliance motor controllers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SM6T22CAHM3_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, optoelectronics, and passive components with emphasis on high-reliability industrial and automotive applications.
The SM6T Series was developed specifically for surface-mount transient suppression in harsh environments, targeting AEC-Q101-compliant automotive subsystems where bidirectional clamping, low profile, and automated assembly are mandatory.
FAQ
What is the clamping voltage of SM6T22CAHM3_B/H at its rated peak pulse current?
The SM6T22CAHM3_B/H has a maximum clamping voltage (VC) of 30.6 V when subjected to its rated peak pulse current of 20.0 A using the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88385 and ensures downstream circuitry remains within safe operating voltage limits during surge events. The SM6T22CAHM3_B/H maintains this clamping performance across its full operating temperature range of -65 °C to +150 °C.
Is SM6T22CAHM3_B/H suitable for automotive applications?
Yes, SM6T22CAHM3_B/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with full automotive reliability validation. It passes temperature cycling, highly accelerated life testing (HTRB), and ESD tests required for under-hood and cabin ECUs. The SM6T22CAHM3_B/H is explicitly listed in Vishay's automotive ordering codes table and supports ISO 7637-2 and ISO 16750-2 compliance when applied per recommended PCB layout.
What does the "CA" suffix indicate in SM6T22CAHM3_B/H?
The "CA" suffix in SM6T22CAHM3_B/H denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression for both positive and negative polarity transients. Unlike unidirectional variants (e.g., SM6T22AHM3_B/H), the SM6T22CAHM3_B/H has no polarity marking and can be placed without orientation concern on differential or AC-coupled signal lines such as CAN, LIN, or sensor bridges.
What is the standoff voltage (VWM) rating for SM6T22CAHM3_B/H?
The standoff voltage (VWM) for SM6T22CAHM3_B/H is 18.8 V - the maximum continuous reverse voltage that can be applied without exceeding 1.0 μA leakage current. This rating ensures reliable operation on 12 V and 24 V automotive systems where nominal rail voltages may reach 16 V or 28 V during load dump, allowing margin between VWM and system operating voltage. The SM6T22CAHM3_B/H maintains this specification at TA = 25 °C per Vishay document 88385.
Does SM6T22CAHM3_B/H require special PCB layout considerations?
Yes, optimal performance of SM6T22CAHM3_B/H requires mounting on minimum recommended copper pad areas of 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal to achieve rated 600 W pulse power dissipation. Short, wide traces and direct connection to ground/power planes minimize inductance and ensure clamping effectiveness. The SM6T22CAHM3_B/H datasheet specifies these thermal and layout requirements in Section "Mechanical Data" and Figure 2 (derating curve), and deviation reduces achievable surge energy handling.
SM6T22CAHM3_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)
SM6T22CAHM3_B/H FAQ
1.How can I place an order for SM6T22CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22CAHM3_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 SM6T22CAHM3_B/H reliable?
The price and inventory of SM6T22CAHM3_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 SM6T22CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for SM6T22CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22CAHM3_B/H?
SM6T22CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22CAHM3_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 SM6T22CAHM3_B/H?
For technical support, including SM6T22CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22CAHM3_B/H requirements.
6.How does Aetrix verify that SM6T22CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SM6T22CAHM3_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 SM6T22CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of SM6T22CAHM3_B/H?
All SM6T22CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22CAHM3_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 SM6T22CAHM3_B/H part is unused and in its original packaging.
Return procedure for SM6T22CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T22CAHM3_B/H Tags
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