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Vishay General Semiconductor - Diodes Division SM6T22CAHM3_B/I
- Part No.:
- SM6T22CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22CAHM3_B/I.pdf
- Description:
- 600W,22V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,671
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Product details
Overview
SM6T22CAHM3_B/I from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor in SMB (DO-214AA) package, with 22 V breakdown voltage (VBR = 20.9–23.1 V at IT = 1.0 mA), 30.6 V max clamping voltage (VC) at 20.0 A IPPM, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive electronics protection.
For engineers reviewing the SM6T22CAHM3_B/I datasheet, SM6T22CAHM3_B/I pinout, SM6T22CAHM3_B/I application, or SM6T22CAHM3_B/I equivalent, key selection criteria include bidirectional clamping capability, low-inductance SMB footprint, halogen-free RoHS compliance, and validated performance under ISO 7637-2 load-dump and ESD IEC 61000-4-2 conditions.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, enabling robust protection of differential signal lines and AC-coupled interfaces without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 μA at VWM = 18.8 V).
Designed for high-energy transients, it delivers 600 W peak pulse power with 10/1000 μs waveform while maintaining clamping voltage ≤30.6 V up to 20 A, and exhibits thermal resistance RθJA = 100 °C/W on standard 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1.0 mA - defines precise voltage threshold where clamping initiates in either direction |
| 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) - limits protected circuit voltage during worst-case surge |
| PPPM | 600 W - sustains high-energy transients common in automotive load-dump and inductive switching |
| TJ range | −65 °C to +150 °C - supports operation in under-hood automotive environments |
| Package | SMB (DO-214AA) - 0.220" × 0.130" footprint compatible with automated SMT placement and reflow |
| Qualification | AEC-Q101 qualified (HM3 suffix) - validated for automotive-grade reliability and lifetime stress testing |
| Material | Halogen-free, RoHS-compliant - meets automotive environmental compliance requirements (JESD201 Class 2 whisker test) |
Pinout & Package
SMB (DO-214AA) surface-mount package with symmetrical dual-terminal construction: no polarity marking required for bidirectional operation; terminals are matte tin-plated for solderability per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional current path | Either terminal serves as anode or cathode depending on transient polarity - enables single-device protection of AC or floating lines |
| Case (body) | Thermal and mechanical interface | Non-electrical; SMB molded case provides UL 94 V-0 flammability rating and mechanical robustness |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Withstands automotive load-dump surges (ISO 7637-2 Pulse 5a) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage stress on downstream ICs like CAN transceivers or sensor front-ends |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns |
| Low inductance SMB layout | Reduces voltage overshoot during fast-rising transients (e.g., ESD >1 kV/ns) |
| AEC-Q101 qualification (HM3) | Validated for 15-year automotive service life under temperature cycling, HTRB, and uHAST |
Applications
| Automotive Sensor Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting MEMS pressure sensors and Hall-effect position sensors in engine control modules from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across sensor supply and ground pins. Use Value: Limits transient voltage to ≤30.6 V, preventing latch-up or gate oxide damage in 5 V/3.3 V sensor ICs while maintaining signal integrity. | Use Scenario: Safeguarding high-speed CAN FD transceivers (e.g., TCAN1042) against ESD and coupled noise on differential bus lines. IC Role / Device Role / Timing Role: Common-mode TVS connected between CAN_H and CAN_L, referenced to ground via low-inductance SMB layout. Use Value: Clamps ±30 kV contact ESD (IEC 61000-4-2) within 1 ns, preserving bus timing margins and preventing bit errors. |
| Industrial PLC I/O Protection | Consumer Appliance Motor Drive Inputs |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from inductive kickback when solenoids or relays de-energize. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminal and common rail to absorb reverse EMF spikes. Use Value: Absorbs 600 W pulses without failure, eliminating need for external snubbers and reducing BOM count by one component per channel. | Use Scenario: Protecting microcontroller GPIOs driving brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Clamp placed across motor coil terminals to suppress flyback voltage during PWM switching. Use Value: Prevents MCU reset or brown-out caused by >100 V flyback spikes, ensuring uninterrupted firmware execution during motor commutation. |
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 | Lower PPPM = 400 W; same VBR range but higher VC = 35.5 V at 11.3 A; SMA package (larger footprint) | Not AEC-Q101 qualified; suitable for commercial/industrial only | Select when cost sensitivity outweighs automotive qualification and surge margin |
| 1.5KE22CA | Higher PPPM = 1500 W; DO-201 package (through-hole); VC = 33.2 V at 45.2 A | Not SMT-compatible; unsuitable for high-density PCBs or automated assembly | Select when board space allows through-hole mounting and higher surge energy must be absorbed |
Compared with SMAJ22CA and 1.5KE22CA, SM6T22CAHM3_B/I offers optimal balance of AEC-Q101 qualification, 600 W surge capacity, SMB footprint, and low clamping voltage - making it the preferred choice for space-constrained automotive and industrial SMT designs requiring production-grade reliability.
Availability
SM6T22CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor modules, CAN FD networks, industrial PLC I/O cards, and consumer appliance motor control systems requiring stable component supply and long-term lifecycle support.
Supply support for SM6T22CAHM3_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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SM6T Series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping performance and AEC-Q101 validation are mandatory.
FAQ
What does the "CA" suffix indicate in SM6T22CAHM3_B/I?
The "CA" suffix denotes a bidirectional configuration - meaning SM6T22CAHM3_B/I clamps voltage transients equally in both polarities, unlike unidirectional variants (e.g., SM6T22A). This eliminates polarity marking during placement and simplifies protection of AC-coupled or floating signal paths such as CAN bus lines or sensor bridges. The device has no cathode band marking, confirming its symmetrical design.
Is SM6T22CAHM3_B/I suitable for automotive applications?
Yes, SM6T22CAHM3_B/I is AEC-Q101 qualified (indicated by the "HM3" suffix), meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias, and unbiased highly accelerated stress testing. It is specifically intended for under-hood and body-control module applications where operating temperatures reach +150 °C and reliability over 15 years is required.
What is the maximum clamping voltage of SM6T22CAHM3_B/I at rated peak pulse current?
The maximum clamping voltage (VC) of SM6T22CAHM3_B/I is 30.6 V when subjected to a 10/1000 μs waveform peak pulse current (IPPM) of 20.0 A. This value is measured per Figure 1 in the official Vishay datasheet (Document Number: 88385) and represents the upper limit of voltage seen by protected circuitry during worst-case surge events.
How does the SMB (DO-214AA) package of SM6T22CAHM3_B/I compare to SMA in size and thermal performance?
The SMB package of SM6T22CAHM3_B/I measures 4.57 mm × 3.94 mm × 2.20 mm - approximately 30% smaller than the SMA (DO-214AC) footprint. Its typical junction-to-ambient thermal resistance is 100 °C/W on 5.0 mm × 5.0 mm copper pads, slightly higher than SMA's ~85 °C/W, but fully adequate for 600 W pulse handling due to short-duration energy absorption and low duty-cycle operation.
Does SM6T22CAHM3_B/I require derating above 25 °C ambient temperature?
Yes, SM6T22CAHM3_B/I must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet: peak pulse power decreases linearly to zero at TJ = 150 °C. For example, at TA = 85 °C, the usable PPPM drops to ~420 W. Designers must ensure thermal pad layout and system airflow maintain junction temperature below 150 °C during repeated surge events.
SM6T22CAHM3_B/I 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:
- 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/I FAQ
1.How can I place an order for SM6T22CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22CAHM3_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 SM6T22CAHM3_B/I reliable?
The price and inventory of SM6T22CAHM3_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 SM6T22CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for SM6T22CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22CAHM3_B/I?
SM6T22CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22CAHM3_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 SM6T22CAHM3_B/I?
For technical support, including SM6T22CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22CAHM3_B/I requirements.
6.How does Aetrix verify that SM6T22CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T22CAHM3_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 SM6T22CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of SM6T22CAHM3_B/I?
All SM6T22CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22CAHM3_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 SM6T22CAHM3_B/I part is unused and in its original packaging.
Return procedure for SM6T22CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T22CAHM3_B/I Tags
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