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Vishay General Semiconductor - Diodes Division SM6T22AHE3/52
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- Part No.:
- SM6T22AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T22AHE3/52.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,161
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Product details
Overview
SM6T22AHE3/52 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 SM6T22AHE3/52 datasheet, SM6T22AHE3/52 pinout, SM6T22AHE3/52 application, or SM6T22AHE3/52 equivalent, key selection criteria include unidirectional polarity, 18.8 V stand-off voltage (VWM), 1.0 μA max reverse leakage at VWM, thermal resistance of 100 °C/W (junction-to-ambient), and RoHS-compliant, halogen-free construction with matte tin-plated leads.
Technical Context
The SM6T22AHE3/52 operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to deliver fast response (<1 ns) to ESD and surge events. Its clamping behavior is defined by a 10/1000 μs waveform, with guaranteed VC ≤ 30.6 V at IPPM = 20 A and derating above TA = 25 °C per Fig. 2.
It is rated for -65 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and supports automated SMT placement due to low-profile SMB packaging and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1.0 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 18.8 V - maximum continuous reverse working voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 30.6 V at 20 A (10/1000 μs) - clamping voltage limiting downstream IC stress during surge |
| PPPM | 600 W - peak transient power handling capacity under standardized surge waveform |
| TJ max. | +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| RθJA | 100 °C/W - thermal resistance indicating need for adequate PCB copper area (0.2" × 0.2") for power dissipation |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads; cathode indicated by band marking; UL 94 V-0 compliant molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground or low-side reference | Completes conduction path during transient clamp; must be routed with low-inductance trace to minimize overshoot |
| Cathode | Current exit terminal in forward bias; marked with band; connected to line being protected | Defines unidirectional polarity - reverse-biased during normal operation, avalanches when VLINE exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| 600 W peak pulse power (10/1000 μs) | Provides robust protection against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surge events in automotive ECUs |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Low inductance SMB package | Minimizes voltage overshoot during fast transients (e.g., ESD > 15 kV contact), critical for sensor and CAN bus line protection |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails and LIN bus lines in BCMs from load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy before it reaches MCU power pins and LIN transceivers. Use Value: Limits clamped voltage to ≤30.6 V, preventing damage to 3.3 V/5 V logic supplies and ensuring system reset integrity during 100 V/50 ms load dump events. | Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers against field-wiring surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff at 18.8 V during normal operation; clamps within nanoseconds when transients exceed VBR. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity requirements without external series impedance. |
| Automotive Sensor Signal Line Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding analog outputs (e.g., pressure, temperature sensors) in ADAS modules from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 μA) TVS placed directly at connector interface to shunt ESD before signal conditioning circuitry. Use Value: Preserves signal integrity with minimal DC loading; clamps ±15 kV contact ESD to <35 V peak, protecting precision op-amps and ADC front-ends. | Use Scenario: Suppressing flyback voltage from brushed DC motor commutation in smart home appliances (e.g., washing machine control boards). IC Role / Device Role / Timing Role: Unidirectional clamp across motor terminals or H-bridge high-side switches to absorb inductive kickback. Use Value: Prevents MOSFET avalanche failure and gate oxide damage by limiting VDS spikes to ≤30.6 V during 100 A turn-off events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/52 | Same SMB package, but lower PPPM = 400 W; VBR = 23.3–25.8 V; VC = 35.5 V @ 11.3 A | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); not recommended for ISO 7637-2 Pulse 5a load dump | Select SMAJ22A-E3/52 only if system-level surge testing confirms 400 W sufficiency and layout allows tighter thermal margin. |
| SMCJ22AHE3/52 | Higher PPPM = 1500 W in larger SMC (DO-214AB) package; identical VBR/VC specs; RθJA = 35 °C/W | Supports higher-reliability automotive power rail protection where board space permits larger footprint | Choose SMCJ22AHE3/52 when system requires >600 W surge margin or extended thermal endurance under sustained pulse trains. |
Compared with SMAJ22A-E3/52 and SMCJ22AHE3/52, the SM6T22AHE3/52 delivers optimal balance of 600 W surge capability, AEC-Q101 qualification, and compact SMB footprint-making it ideal for space-constrained automotive and industrial modules requiring validated automotive reliability without SMC-level board area.
Availability
SM6T22AHE3/52 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and consumer appliance motor control systems requiring stable component supply, AEC-Q101 compliance, and consistent surge performance across production batches.
Supply support for SM6T22AHE3/52 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-specifically targeting automotive, industrial, and telecom applications where AEC-Q101 qualification, low clamping voltage, and automated assembly compatibility are mandatory.
FAQ
What is the polarity configuration of the SM6T22AHE3/52?
The SM6T22AHE3/52 is a unidirectional TVS diode: its cathode is marked with a band and must be connected toward the line being protected, while the anode connects to ground or reference potential. This configuration ensures reverse-biased operation during normal use and controlled avalanche clamping during overvoltage events. The SM6T22AHE3/52 does not conduct in forward direction beyond typical diode drop, making it unsuitable for bidirectional protection unless paired with a complementary device.
Does the SM6T22AHE3/52 meet automotive qualification standards?
Yes, the SM6T22AHE3/52 is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101 qualified construction. This qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD per JESD22-A114, validating its suitability for under-hood and chassis-mounted automotive electronics where reliability under thermal and electrical stress is critical.
What is the maximum clamping voltage of the SM6T22AHE3/52 under standard surge conditions?
The SM6T22AHE3/52 has a maximum clamping voltage (VC) of 30.6 V when subjected to a 10/1000 μs waveform at IPPM = 20 A, as specified in Vishay's datasheet Document Number 88385. This value represents the upper limit of voltage seen by downstream circuitry during worst-case transient events and is measured with the device mounted on 0.2" × 0.2" copper pads per JEDEC standards.
How does the SM6T22AHE3/52 differ from the bidirectional SM6T22CA variant?
The SM6T22AHE3/52 is unidirectional with cathode band marking and specified VBR/VC only in reverse bias, whereas SM6T22CA is bidirectional-featuring symmetric breakdown in both directions and no polarity marking. The SM6T22AHE3/52 offers lower leakage at VWM (1.0 μA) versus SM6T22CA (2.0 μA for VWM ≤ 10 V), and is intended for DC-biased lines like power rails; SM6T22CA suits AC-coupled or floating signal paths such as data lines.
What PCB layout considerations apply to the SM6T22AHE3/52 for optimal thermal and electrical performance?
For optimal performance, the SM6T22AHE3/52 should be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated PPPM and thermal resistance (RθJA = 100 °C/W). Traces to anode and cathode must be short and wide to minimize inductance, especially for ESD protection; avoid vias in series with TVS terminals. The cathode band must align with schematic polarity, and no silkscreen should obscure the marking.
SM6T22AHE3/52 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:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SM6T22AHE3/52 FAQ
1.How can I place an order for SM6T22AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T22AHE3/52 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 SM6T22AHE3/52 reliable?
The price and inventory of SM6T22AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T22AHE3/52 is usually 5 days.
3.What payment methods are accepted for SM6T22AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T22AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T22AHE3/52?
SM6T22AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T22AHE3/52 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 SM6T22AHE3/52?
For technical support, including SM6T22AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T22AHE3/52 requirements.
6.How does Aetrix verify that SM6T22AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SM6T22AHE3/52 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 SM6T22AHE3/52 meets industry standards.
7.What is the process for return or replacement of SM6T22AHE3/52?
All SM6T22AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SM6T22AHE3/52, 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 SM6T22AHE3/52 part is unused and in its original packaging.
Return procedure for SM6T22AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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