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Vishay General Semiconductor - Diodes Division SM15T22AHE3_A/I
- Part No.:
- SM15T22AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T22AHE3_A/I.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,831
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Product details
Overview
SM15T22AHE3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 30.6 V clamping voltage at 49.0 A peak pulse current, and 18.8 V stand-off voltage - designed to protect automotive-grade I/O lines and sensor signal paths against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T22AHE3_A/I datasheet, SM15T22AHE3_A/I pinout, SM15T22AHE3_A/I application, or SM15T22AHE3_A/I equivalent, this AEC-Q101 qualified TVS offers verified clamping performance, low-inductance layout compatibility, and RoHS-compliant matte tin terminations suitable for high-reliability automotive electronics design and production.
Technical Context
The SM15T22AHE3_A/I employs a glass-passivated silicon junction optimized for fast response (<1 ns) to transient overvoltages and stable clamping under repetitive 10/1000 μs surge conditions. Its unidirectional polarity enables integration into DC-biased signal or power rails where reverse conduction must be blocked.
Thermal design relies on RθJL = 15 °C/W (junction-to-lead) and RθJA = 75 °C/W (junction-to-ambient), with derating above 25 °C per Figure 2. The device fails short-circuit under overstress, aligning with fail-safe system-level protection requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains single lightning-surge events without degradation when mounted on 8.0 mm × 8.0 mm copper pads |
| Stand-off Voltage (VWM) | 18.8 V - maximum continuous reverse voltage before leakage exceeds 1 μA; sets minimum operating rail margin |
| Breakdown Voltage (VBR) | 20.9–23.1 V at 1 mA - defines onset of avalanche conduction; ensures reliable turn-on before downstream IC damage thresholds |
| Clamping Voltage (VC) | 30.6 V at 49.0 A - limits transient voltage seen by protected circuitry; critical for safeguarding 24 V automotive sensors |
| Peak Pulse Current (IPPM) | 49.0 A (10/1000 μs) - quantifies maximum surge current the device can shunt while maintaining specified VC |
| Junction Temperature Range | −65 °C to +150 °C - supports operation in under-hood automotive environments and industrial control enclosures |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including temperature cycling, HTRB, and ESD testing per AEC standard |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards; cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to lower-potential side of protected line; enables DC bias path during normal operation |
| Cathode | Avalanche clamping terminal (marked with band) | Connected to higher-potential side (e.g., VCC or signal line); conducts surge current to ground when VAK > VC |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power rating | Enables robust protection against IEC 61000-4-5 Level 4 (4 kV) surges on 24 V systems without derating |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage stress on downstream MOSFET gates and microcontroller I/O pins |
| AEC-Q101 qualification (HE3 suffix) | Confirms suitability for automotive powertrain, body control, and ADAS sensor interfaces per industry reliability standard |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow at 260 °C peak without baking, simplifying SMT assembly |
| Low inductance package | Reduces voltage overshoot during fast-rising transients (e.g., <100 ns edges), improving real-world clamping fidelity |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine control units against load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp positive transients while blocking reverse leakage. Use Value: Maintains VC ≤ 30.6 V during 49 A surges, ensuring protected transceiver ICs remain within absolute maximum ratings. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Standoff-rated TVS installed across input terminals to absorb switching transients before they reach optocoupler inputs. Use Value: Withstands repeated 1500 W pulses without parameter shift, supporting >10-year field life in factory automation equipment. |
| Telecom Power Supply Input | Consumer Appliance Motor Control |
Use Scenario: Secondary-side transient suppression on 24 V telecom power distribution boards exposed to lightning-induced surges via Ethernet or PoE cabling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input rail upstream of DC-DC converters and PMICs. Use Value: Clamps to 30.6 V within nanoseconds, preventing latch-up or burnout in downstream voltage regulators during 10/1000 μs threats. |
Use Scenario: Protecting microcontroller GPIOs driving H-bridge gate drivers in smart washing machine motor control boards. IC Role / Device Role / Timing Role: Localized TVS at motor driver IC supply pins to suppress commutation spikes from brushless DC motors. Use Value: Low RθJL = 15 °C/W enables effective heat dissipation during burst-mode surge events in compact sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ22A | Same SMC package, 1500 W rating, but VWM = 18.8 V, VC = 32.4 V at 43.5 A; no AEC-Q101 qualification | Commercial/industrial use only; not approved for automotive production | Select when AEC-Q101 compliance is unnecessary and higher VC margin is acceptable |
| ON Semiconductor 1.5SMC22A | Identical electrical specs (VWM = 18.8 V, VC = 30.6 V @ 49 A), same SMC package, AEC-Q101 qualified (suffix HA3) | Direct functional match; differs only in branding, traceability, and packaging code (HA3 vs HE3) | Choose for dual-source assurance in automotive BOMs requiring second-source validation |
Compared with SM15T22AHE3_A/I, SMAJ22A lacks automotive qualification and exhibits higher clamping voltage, while 1.5SMC22A matches all key parameters and qualification level - making it a true cross-compatible alternative for AEC-Q101–mandated designs.
Availability
SM15T22AHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom power supply inputs requiring stable component supply, long-term lifecycle support, and AEC-Q101–compliant transient protection.
Supply support for SM15T22AHE3_A/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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The SM15T Series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure modes must be predictable and clamping performance repeatable across temperature and lifetime.
FAQ
What is the clamping voltage of SM15T22AHE3_A/I at its rated peak pulse current?
The SM15T22AHE3_A/I has a maximum clamping voltage (VC) of 30.6 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 49.0 A. This value is measured under standardized test conditions with the device mounted on 8.0 mm × 8.0 mm copper pads per JEDEC guidelines and is guaranteed across the full operating temperature range.
Is SM15T22AHE3_A/I suitable for automotive applications?
Yes, SM15T22AHE3_A/I is AEC-Q101 qualified and carries the HE3 suffix indicating automotive-grade qualification. It meets rigorous stress tests including temperature cycling, high-temperature reverse bias, and ESD, making it appropriate for use in engine control units, body electronics, and ADAS sensor interfaces where reliability is mission-critical.
What does the "HE3_A/I" suffix mean in SM15T22AHE3_A/I?
In SM15T22AHE3_A/I, "HE3" denotes RoHS-compliant construction with AEC-Q101 qualification; "A" indicates unidirectional polarity; "I" specifies packaging in 13-inch tape-and-reel format with 3500 units per reel - distinct from "H" (7-inch reel, 850 units). The full ordering code confirms automotive-grade traceability and moisture sensitivity level 1.
How does SM15T22AHE3_A/I differ from bidirectional TVS diodes like SM15T22CA?
SM15T22AHE3_A/I is unidirectional and features a cathode band for polarity identification, allowing it to block reverse current while clamping positive transients. In contrast, SM15T22CA is bidirectional with no polarity marking and clamps transients of either polarity - making SM15T22AHE3_A/I appropriate for DC-biased lines and SM15T22CA better suited for AC or differential signal lines like RS-485.
What is the thermal resistance of SM15T22AHE3_A/I, and how does it affect PCB layout?
SM15T22AHE3_A/I has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W and junction-to-ambient (RθJA) of 75 °C/W. To maintain safe operating temperatures during surge events, PCB layout must use minimum 8.0 mm × 8.0 mm copper pads per terminal - reducing thermal impedance and preventing localized overheating that could compromise clamping consistency.
SM15T22AHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, 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):
- 49A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCJ)
SM15T22AHE3_A/I FAQ
1.How can I place an order for SM15T22AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T22AHE3_A/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 SM15T22AHE3_A/I reliable?
The price and inventory of SM15T22AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T22AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM15T22AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T22AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T22AHE3_A/I?
SM15T22AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T22AHE3_A/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 SM15T22AHE3_A/I?
For technical support, including SM15T22AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T22AHE3_A/I requirements.
6.How does Aetrix verify that SM15T22AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T22AHE3_A/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 SM15T22AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T22AHE3_A/I?
All SM15T22AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T22AHE3_A/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 SM15T22AHE3_A/I part is unused and in its original packaging.
Return procedure for SM15T22AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T22AHE3_A/I Tags
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Diodes Incorporated
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