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Vishay General Semiconductor - Diodes Division SM6T22AHM3_B/I
- Part No.:
- SM6T22AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22AHM3_B/I.pdf
- Description:
- 600W,22V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,563
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Product details
Overview
SM6T22AHM3_B/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal 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 SM6T22AHM3_B/I datasheet, SM6T22AHM3_B/I pinout, SM6T22AHM3_B/I application, or SM6T22AHM3_B/I equivalent, key selection criteria include unidirectional polarity, 18.8 V stand-off voltage (VWM), 1 μA max reverse leakage at VWM, 150 °C max junction temperature, and halogen-free RoHS-compliant construction with M3 suffix.
Technical Context
The SM6T22AHM3_B/I operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to deliver fast response (<1 ns) to ESD and surge events. Its clamping action begins at VBR ≥ 20.9 V and limits transient voltages to ≤30.6 V under 20 A (10/1000 μs), enabling robust protection of downstream ICs and MOSFETs without forward conduction during normal operation.
Designed for surface-mount assembly on standard PCB copper pads (0.2" × 0.2"), it exhibits low thermal resistance (RθJA = 100 °C/W, RθJL = 20 °C/W) and meets J-STD-020 MSL Level 1 with 260 °C reflow peak, supporting high-reliability automated manufacturing in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1 mA - defines precise avalanche initiation threshold for reliable overvoltage detection |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | 30.6 V at 20 A (10/1000 μs) - ensures protected circuit sees no more than 30.6 V during worst-case surge |
| PPPM | 600 W - sustains high-energy transients common in automotive load-dump and inductive switching |
| IFSM | 100 A (10 ms half-sine) - withstands single-event surge currents without bond-wire failure |
| TJ max | +150 °C - supports operation in under-hood automotive and high-ambient industrial environments |
| Package | SMB (DO-214AA) - industry-standard 2-pin SMD outline with 5.59 mm body length and 2.20 mm height |
Pinout & Package
SMB (DO-214AA) surface-mount package with matte tin-plated leads; cathode indicated by band at one end; terminals solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (reverse-biased during clamping) | Connected to protected line's low-side or ground return path; enables unidirectional clamping to ground |
| Cathode | Avalanche conduction terminal (marked with band) | Connected to protected line's high-side or supply rail; conducts surge current to ground when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Handles automotive load-dump surges (ISO 7637-2 Pulse 5a) without degradation |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements |
| Low inductance SMB package | Minimizes voltage overshoot during fast-rising transients (e.g., EFT IEC 61000-4-4) |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow without popcorn cracking or delamination |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs against ISO 7637-2 load-dump transients up to 60 V/100 ms. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp overvoltage before reaching PMIC or MCU. Use Value: Limits peak voltage to 30.6 V at 20 A, preventing latch-up or gate oxide damage in 3.3 V/5 V logic supplies. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: TVS mounted at connector interface to shunt transients before entering op-amp or ADC front-end. Use Value: Sub-1 ns response and 1 μA leakage at 18.8 V preserve signal integrity and measurement accuracy in µV-level sensing. |
| Consumer USB Power Delivery Protection | Telecom DC Feeder Line Protection |
Use Scenario: Safeguarding USB-C PD controller ICs and Type-C port power switches from hot-plug and inrush-induced spikes. IC Role / Device Role / Timing Role: Unidirectional clamp on VBUS line referenced to GND, absorbing 8/20 μs surges up to 39.3 V. Use Value: 30.6 V clamping at 20 A ensures PD controller remains within absolute maximum ratings during repeated plug/unplug cycles. | Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras, wireless APs) from lightning-induced surges on 48 V DC feeder lines. IC Role / Device Role / Timing Role: TVS installed at DC input stage to divert induced common-mode energy to earth ground. Use Value: 600 W rating and 150 °C TJ max enable sustained operation in outdoor telecom enclosures with minimal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/5B | Same VBR range (20.9–23.1 V), but SMA package (smaller footprint, higher RθJA = 140 °C/W), non-AEC-Q101, E3 suffix (RoHS, not halogen-free) | Limited to commercial-grade consumer/industrial use; unsuitable for automotive under-hood deployment | Select when board space is constrained and AEC-Q101 is not required; verify thermal margin with lower power derating. |
| SMCJ22A-HM3 | Higher PPPM = 1500 W, same SMB package and HM3 halogen-free/AEC-Q101 spec, but larger die and higher VC = 35.5 V at 42.9 A | Better suited for severe surge environments (e.g., railway, heavy machinery); higher clamping may stress sensitive loads | Choose when system-level surge tests exceed 600 W (e.g., IEC 61000-4-5 Level 4); confirm downstream voltage tolerance allows 35.5 V clamp. |
Compared with SMAJ22A-E3/5B and SMCJ22A-HM3, the SM6T22AHM3_B/I delivers optimal balance of automotive qualification, 600 W surge handling, and 30.6 V clamping in a cost-effective SMB footprint-making it ideal for mid-tier automotive modules and industrial controllers where both reliability and voltage margin are critical.
Availability
SM6T22AHM3_B/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power feeders requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SM6T22AHM3_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 robust transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where AEC-Q101 compliance, high surge immunity, and consistent clamping performance are mandatory.
FAQ
What is the exact breakdown voltage range for SM6T22AHM3_B/I?
The SM6T22AHM3_B/I has a guaranteed breakdown voltage (VBR) range of 20.9 V to 23.1 V at test current IT = 1 mA, per Vishay Document Number 88385, page 2. This range ensures consistent avalanche initiation across production lots and temperature extremes, critical for predictable clamping behavior in safety-critical automotive circuits.
Is SM6T22AHM3_B/I suitable for bidirectional transient protection?
No, SM6T22AHM3_B/I is a unidirectional TVS diode, as confirmed by its "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SM6T22CA). Using SM6T22AHM3_B/I in bidirectional configurations risks forward conduction and failure during negative transients.
Does SM6T22AHM3_B/I meet automotive qualification standards?
Yes, SM6T22AHM3_B/I carries the HM3 suffix, indicating halogen-free, RoHS-compliant construction and full AEC-Q101 qualification per Vishay's ordering information table (page 2). This includes stress testing for temperature cycling, high-temperature reverse bias, and ESD, validating its use in automotive powertrain and body electronics.
What is the maximum clamping voltage of SM6T22AHM3_B/I under surge conditions?
The SM6T22AHM3_B/I clamps to a maximum of 30.6 V at 20 A peak pulse current with a 10/1000 μs waveform, as specified in the Electrical Characteristics table (Document 88385, page 2). This value is measured under standardized conditions and defines the upper voltage limit imposed on protected circuits during surge events.
How does the SMB package of SM6T22AHM3_B/I impact PCB layout?
The SMB (DO-214AA) package of SM6T22AHM3_B/I requires minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for thermal and surge current handling, per Vishay's derating curves. Its 5.59 mm body length and 2.20 mm height allow compact placement while maintaining creepage/clearance for 24–48 V systems, unlike smaller SMA alternatives.
SM6T22AHM3_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:
- 1
- Bidirectional Channels:
- -
- 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)
SM6T22AHM3_B/I FAQ
1.How can I place an order for SM6T22AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22AHM3_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 SM6T22AHM3_B/I reliable?
The price and inventory of SM6T22AHM3_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 SM6T22AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SM6T22AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22AHM3_B/I?
SM6T22AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22AHM3_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 SM6T22AHM3_B/I?
For technical support, including SM6T22AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22AHM3_B/I requirements.
6.How does Aetrix verify that SM6T22AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T22AHM3_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 SM6T22AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SM6T22AHM3_B/I?
All SM6T22AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22AHM3_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 SM6T22AHM3_B/I part is unused and in its original packaging.
Return procedure for SM6T22AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T22AHM3_B/I Tags
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