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Vishay General Semiconductor - Diodes Division SM15T22AHE3/57T
- Part No.:
- SM15T22AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T22AHE3/57T.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,084
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Product details
Overview
SM15T22AHE3/57T from Vishay General Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) in SMC (DO-214AB) package, featuring 22 V breakdown voltage (VBR = 20.9–23.1 V), 18.8 V stand-off voltage (VWM), 30.6 V clamping voltage (VC) at 49.0 A peak pulse current, and AEC-Q101 qualification for automotive use. It protects MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T22AHE3/57T datasheet, SM15T22AHE3/57T pinout, SM15T22AHE3/57T application, or SM15T22AHE3/57T equivalent, key selection criteria include unidirectional polarity, 1500 W 10/1000 μs surge rating, 18.8 V working voltage, AEC-Q101 qualification status, and SMC package compatibility with automated placement on industrial and automotive PCBs.
Technical Context
The SM15T22AHE3/57T employs a glass-passivated silicon junction optimized for low-inductance transient clamping. Its unidirectional architecture provides cathode-banded polarity with reverse-biased operation during overvoltage events, delivering precise clamping within ±5% VBR tolerance at 1.0 mA test current.
Designed for high-impedance source environments, it sustains 200 A non-repetitive forward surge (10 ms half-sine) and operates across –65 °C to +150 °C junction temperature. Thermal resistance is 75 °C/W (junction-to-ambient) on standard 8.0 mm × 8.0 mm copper pads, enabling reliable power dissipation up to 6.5 W at 50 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at 1.0 mA - defines precise reverse-breakdown threshold for repeatable clamping onset |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 30.6 V at 49.0 A (10/1000 μs) - clamped voltage limiting downstream component stress during surge |
| PPPM | 1500 W - peak pulse power handling for lightning and inductive switching transients |
| TJ max. | +150 °C - enables operation in under-hood automotive and industrial environments |
| AEC-Q101 | Qualified - validated for automotive electronics per stress-test requirements (HTOL, TC, HTRB, etc.) |
| Package | SMC (DO-214AB) - surface-mount, low-profile, MSL Level 1, 260 °C reflow compatible |
Pinout & Package
SM15T22AHE3/57T uses the SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, 0.305" × 0.220" footprint, cathode band marking on one end. Mounting requires 8.0 mm × 8.0 mm copper pads per terminal per JEDEC standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path (cathode-banded end is opposite) | Connected to system ground or low-side reference; completes clamping path during reverse overvoltage |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., CAN_H, sensor supply); conducts only during transient overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Handles lightning-induced surges and motor-switching transients without degradation |
| Glass-passivated chip junction | Ensures stable VBR and low leakage (<1.0 μA at VWM) over temperature and lifetime |
| Low-inductance SMC package | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, relay bounce) |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive powertrain, body control, and ADAS modules requiring long-term reliability |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without moisture-related popcorning or delamination |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT rail and ground to clamp >30 V spikes. Use Value: Clamps to 30.6 V at 49 A, preventing damage to 36 V-rated DC-DC converters and microcontrollers. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Point-of-entry protection on 4–20 mA or 0–10 V signal lines exposed to field wiring noise. Use Value: Sub-31 V clamping preserves ADC input integrity while surviving 1500 W induced surges from nearby motor drives. |
| Automotive CAN Bus Transient Suppression | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding CAN transceivers (e.g., TJA1042) against ESD and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; this unidirectional part used on VCC supply side of CAN node. Use Value: 18.8 V VWM ensures no conduction during normal 12 V bus operation; 30.6 V VC prevents transceiver latch-up. |
Use Scenario: Protecting gate drivers and bootstrap circuits in washing machine BLDC inverters. IC Role / Device Role / Timing Role: Clamp induced spikes from freewheeling diodes and transformer leakage in high-side switch nodes. Use Value: 200 A IFSM rating withstands repetitive coil-switching surges; AEC-Q101 grade supports extended appliance lifecycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/57T | Lower peak power (400 W), same VWM/VBR, SMA package (smaller thermal mass) | Limited to lower-energy transients; unsuitable for lightning-level threats or high-current inductive loads | Select when space-constrained and threat level is <500 W (e.g., USB port ESD only) |
| SMCJ22AHE3/57T | Same SMC package, AEC-Q101, but 3000 W rating (VC = 35.5 V @ 84.5 A) | Higher clamping voltage and larger footprint; better for severe automotive load-dump scenarios | Choose when system-level testing shows 30.6 V clamping insufficient and board area allows larger device |
Compared with SMAJ22A-E3/57T, SM15T22AHE3/57T delivers 275% higher surge energy handling in identical SMC layout; versus SMCJ22AHE3/57T, it offers tighter clamping (30.6 V vs. 35.5 V) at lower cost and smaller thermal footprint for mid-tier automotive and industrial designs.
Availability
SM15T22AHE3/57T is available at Aetrix Electronics and suitable for automotive ECU power rails, industrial sensor interfaces, CAN bus supply lines, and consumer appliance motor drive circuits requiring stable component supply with AEC-Q101 compliance and 1500 W surge immunity.
Supply support for SM15T22AHE3/57T 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, automotive-grade, and industry-standard components.
The SM15T Series was developed specifically for robust transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where 1500 W surge capability and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SM15T22AHE3/57T at its rated peak pulse current?
The SM15T22AHE3/57T has a maximum clamping voltage (VC) of 30.6 V when subjected to its rated 49.0 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM15T22AHE3/57T suitable for bidirectional transient protection?
No, SM15T22AHE3/57T is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SM15T22CA). Using SM15T22AHE3/57T on AC or symmetrical signal lines would result in forward conduction during negative half-cycles and potential failure.
Does SM15T22AHE3/57T require heatsinking for standard operation?
SM15T22AHE3/57T does not require external heatsinking for transient suppression duty, as its 1500 W rating applies to non-repetitive pulses. However, for continuous power dissipation, its 6.5 W rating at 50 °C ambient assumes mounting on 8.0 mm × 8.0 mm copper pads per terminal-no additional heatsink is specified or needed in typical automotive or industrial applications.
What does the "HE3" suffix signify in SM15T22AHE3/57T?
The "HE3" suffix in SM15T22AHE3/57T denotes RoHS-compliant construction and AEC-Q101 qualification. It distinguishes this automotive-grade version from commercial "E3" variants and confirms compliance with stress tests including high-temperature operating life, temperature cycling, and humidity bias HTRB per AEC-Q101 Rev D.
Can SM15T22AHE3/57T be used in place of SMAJ22A on the same PCB footprint?
No-SM15T22AHE3/57T uses the SMC (DO-214AB) package, while SMAJ22A uses the smaller SMA (DO-214AC) package. Their footprints are incompatible: SMC measures 0.305" × 0.220", SMA is 0.205" × 0.130". Replacing SMAJ22A with SM15T22AHE3/57T requires PCB layout revision to accommodate the larger pad dimensions and thermal relief.
SM15T22AHE3/57T 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:
- 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):
- 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)
SM15T22AHE3/57T FAQ
1.How can I place an order for SM15T22AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T22AHE3/57T 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 SM15T22AHE3/57T reliable?
The price and inventory of SM15T22AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T22AHE3/57T is usually 5 days.
3.What payment methods are accepted for SM15T22AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T22AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T22AHE3/57T?
SM15T22AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T22AHE3/57T 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 SM15T22AHE3/57T?
For technical support, including SM15T22AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T22AHE3/57T requirements.
6.How does Aetrix verify that SM15T22AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T22AHE3/57T 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 SM15T22AHE3/57T meets industry standards.
7.What is the process for return or replacement of SM15T22AHE3/57T?
All SM15T22AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T22AHE3/57T, 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 SM15T22AHE3/57T part is unused and in its original packaging.
Return procedure for SM15T22AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T22AHE3/57T Tags
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