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Vishay General Semiconductor - Diodes Division SM15T22CAHE3/57T
- Part No.:
- SM15T22CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T22CAHE3/57T.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,007
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Product details
Overview
SM15T22CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 30.6 V maximum clamping voltage at 49.0 A IPPM, and 18.8 V stand-off voltage. It protects signal lines and power rails in automotive sensor units and industrial I/O interfaces against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T22CAHE3/57T datasheet, SM15T22CAHE3/57T pinout, SM15T22CAHE3/57T application, or SM15T22CAHE3/57T equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, clamping performance under 10/1000 μs surge, thermal resistance data, and direct alternatives for bidirectional TVS selection in high-reliability embedded systems.
Technical Context
The SM15T22CAHE3/57T is a glass-passivated, bidirectional silicon avalanche diode designed to clamp transient overvoltages before they damage downstream ICs or MOSFETs. Its breakdown voltage is specified at 20.9–23.1 V (min/max) with 1 mA test current, and it maintains low dynamic impedance to ensure consistent clamping across surge events.
It operates within -65 °C to +150 °C junction temperature range, features 75 °C/W junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm copper pads, and meets J-STD-020 MSL Level 1 with 260 °C lead-free reflow peak, confirming suitability for automated SMT assembly in automotive-grade production.
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 per recommended pad layout |
| Stand-off Voltage (VWM) | 18.8 V - maximum continuous reverse voltage before leakage exceeds 1 μA, defining safe operating margin below breakdown |
| Breakdown Voltage (VBR) | 20.9–23.1 V at 1 mA - precise avalanche initiation threshold enabling accurate system-level overvoltage coordination |
| Clamping Voltage (VC) | 30.6 V at 49.0 A IPPM - limits transient voltage seen by protected circuitry during worst-case 10/1000 μs surge |
| Junction Temperature Range | -65 °C to +150 °C - supports operation in under-hood automotive and industrial environments without derating |
| Thermal Resistance (RθJA) | 75 °C/W - enables thermal design validation using standard JEDEC PCB layouts without added heatsinking |
| AEC-Q101 Qualified | Yes - certified for automotive applications including engine control, ADAS sensors, and body electronics |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Bidirectional construction means no polarity marking; both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Either terminal serves as current entry/exit point during bidirectional surges; no DC polarity dependency |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables protection against IEC 61000-4-5 Level 4 (4 kV) surges without external series impedance |
| Glass-passivated junction | Ensures long-term reliability and stable VBR over temperature and lifetime in harsh environments |
| Low inductance structure | Minimizes voltage overshoot during fast-rising transients (e.g., ESD or switching spikes) |
| MSL Level 1, 260 °C peak | Supports single-pass lead-free reflow without popcorn or delamination risk |
| AEC-Q101 qualification (HE3 suffix) | Validates robustness for automotive applications requiring zero defects and extended temperature cycling |
Applications
| Automotive Sensor Protection | Industrial I/O Line Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine control modules from load-dump and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt surge energy before reaching signal conditioning circuitry. Use Value: Clamps transients to ≤30.6 V while sustaining 49 A peak current, preserving signal integrity and preventing latch-up in 3.3 V/5 V microcontrollers. |
Use Scenario: Safeguarding PLC digital input channels connected to 24 V field wiring exposed to relay coil switching and motor drive noise. IC Role / Device Role / Timing Role: Primary overvoltage suppression device on each input line, coordinated with upstream fuse and series resistor. Use Value: Withstands repeated 10/1000 μs surges up to 1500 W without parameter shift, ensuring >10-year field reliability in factory automation. |
| Telecom Power Rail Protection | Consumer Device USB Port Protection |
Use Scenario: Guarding 12 V/24 V DC power inputs of base station remote radio units against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage transient suppressor in multi-stage protection architecture, absorbing bulk surge energy before TVS arrays or MOVs. Use Value: 18.8 V VWM allows compatibility with 24 V nominal systems while providing 2.2× margin above operating voltage. |
Use Scenario: Protecting USB 2.0 data lines and VBUS in smart home hubs against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed inline with differential pairs to limit voltage without distorting signal integrity. Use Value: 30.6 V clamping ensures downstream USB PHY ICs remain within absolute maximum ratings during ±8 kV contact ESD (IEC 61000-4-2). |
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-E3/57T | Lower peak power (400 W), same VWM/VBR range, SMA package (smaller footprint, higher RθJA = 110 °C/W) | Suitable for space-constrained consumer designs with lower threat levels; not rated for automotive AEC-Q101 | Select when board area is critical and surge threat is limited to IEC 61000-4-2 ESD or low-energy switching noise. |
| SMCJ22CAHE3/57T | Same SMC package, AEC-Q101 qualified, but 3000 W rating (higher IPPM = 135 A, VC = 35.5 V at 84.5 A) | Better suited for high-threat zones like vehicle battery lines or industrial motor drives where higher energy must be absorbed | Choose when system-level testing requires >1500 W margin or coordination with upstream fuses demands lower clamping voltage at higher currents. |
Compared with SMAJ22CA-E3/57T, SM15T22CAHE3/57T provides 2.7× higher surge capacity and automotive qualification; compared with SMCJ22CAHE3/57T, it offers tighter clamping (30.6 V vs. 35.5 V at rated current) at lower cost and smaller footprint for mid-tier threat environments.
Availability
SM15T22CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, and telecom power supply inputs requiring stable component supply, AEC-Q101 compliance, and repeatable 1500 W transient suppression performance.
Supply support for SM15T22CAHE3/57T 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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The SM15T Series was developed to deliver high-power, AEC-Q101-compliant transient suppression in compact SMC packages for next-generation automotive and industrial electronics requiring robust EMC immunity.
FAQ
What is the clamping voltage of SM15T22CAHE3/57T at its rated peak pulse current?
The SM15T22CAHE3/57T has a maximum clamping voltage (VC) of 30.6 V at 49.0 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per JEDEC guidelines and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM15T22CAHE3/57T qualified for automotive applications?
Yes, SM15T22CAHE3/57T is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its ordering code. This qualification covers stress tests including temperature cycling, humidity bias, mechanical shock, and high-temperature operating life, making it suitable for use in engine control units, ADAS sensors, and body electronics.
What does the "CA" suffix indicate in SM15T22CAHE3/57T?
The "CA" suffix denotes a bidirectional configuration: SM15T22CAHE3/57T conducts and clamps transient energy equally in both directions, unlike unidirectional variants (e.g., SM15T22AHE3/57T) that only protect against reverse-polarity surges. No polarity marking is present on the SMC package.
What is the thermal resistance of SM15T22CAHE3/57T, and how does it affect PCB layout?
SM15T22CAHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes standard JEDEC test conditions and guides minimum pad sizing-reducing pad area increases RθJA and may require derating of power handling capability.
How does SM15T22CAHE3/57T compare to SM15T22AHE3/57T in circuit design?
SM15T22CAHE3/57T is bidirectional and used where surge polarity is unpredictable (e.g., AC-coupled signal lines or floating buses); SM15T22AHE3/57T is unidirectional with cathode band marking and suits DC-biased rails where only reverse transients occur. Their VWM, VBR, and clamping specs are identical, but layout and system-level coordination differ.
SM15T22CAHE3/57T 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:
- -
- 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):
- 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)
SM15T22CAHE3/57T FAQ
1.How can I place an order for SM15T22CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T22CAHE3/57T 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 SM15T22CAHE3/57T reliable?
The price and inventory of SM15T22CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T22CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SM15T22CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T22CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T22CAHE3/57T?
SM15T22CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T22CAHE3/57T 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 SM15T22CAHE3/57T?
For technical support, including SM15T22CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T22CAHE3/57T requirements.
6.How does Aetrix verify that SM15T22CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T22CAHE3/57T 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 SM15T22CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SM15T22CAHE3/57T?
All SM15T22CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T22CAHE3/57T, 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 SM15T22CAHE3/57T part is unused and in its original packaging.
Return procedure for SM15T22CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T22CAHE3/57T Tags
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