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Vishay General Semiconductor - Diodes Division SM6T22CAHM3_A/H
- Part No.:
- SM6T22CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22CAHM3_A/H.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,661
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Product details
Overview
SM6T22CAHM3_A/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 22 V breakdown voltage (VBR = 20.9–23.1 V at 1 mA), 30.6 V maximum clamping voltage (VC) at 20 A peak pulse current, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive electronics protection.
For engineers reviewing the SM6T22CAHM3_A/H datasheet, SM6T22CAHM3_A/H pinout, SM6T22CAHM3_A/H application, or SM6T22CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.32), halogen-free RoHS-compliant construction, and compatibility with automated SMT placement on PCBs requiring IEC 61000-4-2/4-4/4-5 level protection.
Technical Context
The SM6T22CAHM3_A/H operates as a voltage-clamped bidirectional protector with symmetrical avalanche breakdown in both polarities, enabling robust surge suppression without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 μA at 18.8 V).
Thermal design relies on RθJA = 100 °C/W and RθJL = 20 °C/W, supporting operation up to TJ = 150 °C. The device meets MSL Level 1 (260 °C reflow peak) and is qualified per AEC-Q101 for under-hood automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines precise clamping onset threshold for bidirectional surge events |
| VWM | 18.8 V - maximum continuous reverse stand-off voltage before leakage exceeds 1 μA |
| VC @ IPPM | 30.6 V at 20 A (10/1000 μs) - actual worst-case clamped voltage seen by protected IC during surge |
| PPPM | 600 W - peak transient power handling capacity under standardized surge waveform |
| TJ max. | +150 °C - enables reliable operation in high-temperature automotive engine compartments |
| Package | SMB (DO-214AA) - surface-mount outline with 5.59 mm × 3.94 mm footprint and 2.20 mm height |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD stress |
Pinout & Package
SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, no polarity marking (bidirectional), compliant with J-STD-002 solderability and JESD22-B102 whisker resistance Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | No functional polarity - either terminal serves as anode or cathode depending on transient polarity |
| Case (body) | Non-electrical mechanical interface | Provides thermal path to PCB copper pads; no electrical connection or grounding function |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables protection against severe ISO 7637-2 Pulse 5a/b and IEC 61000-4-5 Level 4 surges |
| Low clamping voltage (30.6 V @ 20 A) | Keeps downstream 24 V automotive ICs within safe operating area during 100 A system-level transients |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including powertrain, body control, and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets ELV Directive and IPC-1752A material declaration requirements for Tier 1 automotive supply chains |
| MSL Level 1 (260 °C peak) | Supports single-pass lead-free reflow without popcorn cracking or delamination risk |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point before signal conditioning circuitry. Use Value: Limits transient voltage to ≤30.6 V, preventing latch-up or gate oxide damage in 3.3 V/5 V microcontrollers and analog front-ends. |
Use Scenario: Safeguarding two-wire CAN FD physical layer nodes against ESD (±25 kV contact) and fast transient bursts in factory automation networks. IC Role / Device Role / Timing Role: Low-inductance TVS across differential pair (CANH–CANL) to clamp common-mode surges without distorting signal integrity. Use Value: Maintains <1 ns response time and preserves CAN bit timing margins due to sub-100 pF junction capacitance at zero bias. |
| Consumer USB Power Delivery | Telecom PoE Port Protection |
Use Scenario: Shielding USB-C CC and VBUS lines from hot-plug ESD and cable-induced surges in portable chargers and docking stations. IC Role / Device Role / Timing Role: Bidirectional shunt protector mounted adjacent to USB controller IC with minimal trace length. Use Value: Achieves <100 ps response time and clamps ±15 kV ESD pulses to <35 V, preserving USB PD negotiation handshake reliability. |
Use Scenario: Front-end surge suppression on IEEE 802.3af/at/bt Power over Ethernet (PoE) injectors and switches exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device across DC power pair (PSE/PD side) before DC-DC converter input stage. Use Value: Handles 600 W peak pulse without degradation, sustaining 100+ surge events while maintaining VWM = 18.8 V hold-off for 48 V PoE systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22CA | Same VBR range (20.9–23.1 V), but lower PPPM = 400 W and higher VC = 35.5 V @ 17.1 A; SMA package (smaller thermal mass) | Limited to lower-energy transients (IEC 61000-4-2 Level 3); not AEC-Q101 qualified | Select when cost or board space is critical and automotive qualification is unnecessary |
| 1.5KE22CA | Higher PPPM = 1500 W, but axial DO-201 package; VC = 33.2 V @ 45.2 A; no AEC-Q101 or MSL Level 1 rating | Suitable for high-power industrial AC line protection, not SMT-compatible or automotive-ready | Choose only for through-hole designs requiring >600 W surge handling and where reflow compatibility is irrelevant |
Compared with SMAJ22CA and 1.5KE22CA, SM6T22CAHM3_A/H uniquely combines AEC-Q101 qualification, SMB SMT compatibility, 600 W capability, and halogen-free construction-making it the only option qualified for volume production in automotive signal-line protection where board space, reflow yield, and long-term reliability are jointly constrained.
Availability
SM6T22CAHM3_A/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial fieldbus interface development, and consumer USB-C power delivery systems requiring stable component supply with full traceability and lifecycle management.
Supply support for SM6T22CAHM3_A/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, automotive-qualified components.
The SM6T Series was developed specifically for robust, surface-mount transient suppression in automotive and industrial environments where AEC-Q101 compliance, low clamping voltage, and automated assembly compatibility are mandatory.
FAQ
What does the "HM3" suffix indicate in SM6T22CAHM3_A/H?
The HM3 suffix in SM6T22CAHM3_A/H denotes halogen-free, RoHS-compliant construction with full AEC-Q101 qualification. It confirms compliance with automotive reliability standards including temperature cycling, highly accelerated life testing (HALT), and ESD robustness per ISO 10605, distinguishing it from commercial-grade M3 or E3 variants.
Is SM6T22CAHM3_A/H unidirectional or bidirectional?
SM6T22CAHM3_A/H is a bidirectional TVS diode, as indicated by the "CA" suffix. It provides symmetrical clamping in both polarities with identical VBR, VC, and leakage characteristics-ideal for protecting AC-coupled or differential signal lines such as CAN, LIN, or USB without polarity concerns.
What is the maximum clamping voltage of SM6T22CAHM3_A/H under surge conditions?
The maximum clamping voltage of SM6T22CAHM3_A/H is 30.6 V when subjected to a 10/1000 μs waveform at 20 A peak pulse current (IPPM). This value is measured per JEDEC standards and represents the highest voltage imposed on protected circuitry during worst-case transient events.
Does SM6T22CAHM3_A/H require a heatsink for standard operation?
No, SM6T22CAHM3_A/H does not require an external heatsink for normal transient suppression duty. Its RθJA = 100 °C/W and 5.0 W steady-state power dissipation rating are sufficient when mounted on standard 0.2" × 0.2" copper pads per Vishay's recommended layout-no additional thermal management is needed for typical surge duty cycles.
How does SM6T22CAHM3_A/H compare to SM6T22A in terms of automotive suitability?
SM6T22CAHM3_A/H is AEC-Q101 qualified and halogen-free, whereas SM6T22A (unidirectional, no HM3 suffix) is commercial-grade only. The HM3 variant undergoes extended stress testing-including 1000-hour HTOL and -55 °C to +150 °C thermal cycling-making SM6T22CAHM3_A/H the only version approved for automotive powertrain and safety-critical modules.
SM6T22CAHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
- 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_A/H FAQ
1.How can I place an order for SM6T22CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22CAHM3_A/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_A/H reliable?
The price and inventory of SM6T22CAHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for SM6T22CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22CAHM3_A/H?
SM6T22CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22CAHM3_A/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_A/H?
For technical support, including SM6T22CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22CAHM3_A/H requirements.
6.How does Aetrix verify that SM6T22CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SM6T22CAHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of SM6T22CAHM3_A/H?
All SM6T22CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22CAHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for SM6T22CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T22CAHM3_A/H Tags
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