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Vishay General Semiconductor - Diodes Division SM15T22CA-E3/9AT
- Part No.:
- SM15T22CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T22CA-E3/9AT.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,026
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Product details
Overview
SM15T22CA-E3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 22 V standoff voltage (VWM), and clamping voltage of 30.6 V at 49.0 A peak pulse current. It protects signal lines and power rails in automotive sensor units and industrial I/O interfaces against lightning-induced and switching transients.
For engineers reviewing the SM15T22CA-E3/9AT datasheet, SM15T22CA-E3/9AT pinout, SM15T22CA-E3/9AT application, or SM15T22CA-E3/9AT equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, SMC package thermal data, and AEC-Q101-qualified alternatives for automotive-grade transient protection design.
Technical Context
The SM15T22CA-E3/9AT operates as a bidirectional avalanche diode with symmetrical breakdown in both polarities, enabling suppression of positive and negative transients without polarity sensitivity. Its 22 V stand-off voltage ensures compatibility with 18–24 V nominal systems, while its 30.6 V clamping voltage at 49.0 A limits downstream voltage stress during 10/1000 μs surges.
Designed for high-energy threat environments, it features low inductance and glass-passivated junction for stable clamping performance. Thermal resistance is 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), supporting reliable operation up to 150 °C junction temperature under defined pad layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains single high-energy transients typical of lightning-induced surges on external I/O lines |
| Stand-off Voltage (VWM) | 22 V - blocks normal operating voltages up to 22 V DC while remaining non-conductive |
| Breakdown Voltage (VBR) | 20.9–23.1 V at 1 mA - defines the onset of avalanche conduction in either direction |
| Clamping Voltage (VC) | 30.6 V at 49.0 A - maximum voltage seen by protected circuit during specified 10/1000 μs surge |
| Peak Pulse Current (IPPM) | 49.0 A - peak current handled during 10/1000 μs waveform before clamping voltage exceeds spec |
| Junction Temperature Range | −65 °C to +150 °C - supports operation in under-hood automotive and industrial ambient environments |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for automated assembly |
Pinout & Package
SM15T22CA-E3/9AT uses the SMC (DO-214AB) package: a two-terminal, bidirectional device with no polarity marking. The case is molded compound meeting UL 94 V-0; terminals are matte tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No functional distinction between terminals; identical clamping behavior in both directions |
| Case (body) | Thermal and mechanical interface | Non-electrical; provides mechanical mounting and contributes to thermal dissipation via copper pads |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power rating | Enables robust protection against IEC 61000-4-5 Level 4 (4 kV line-earth) surges when properly mounted |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes overvoltage stress on downstream ICs such as CAN transceivers or microcontroller I/O pins |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT reflow profiles without moisture-related reliability risk |
| Glass-passivated junction | Ensures stable leakage current (<1.0 μA at VWM) and long-term parameter stability across temperature |
| AEC-Q101 qualification option | Available as SM15T22CAHE3_A/I - validated for automotive under-hood applications per stress test requirements |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog and digital signal lines from load-dump and inductive switching transients in engine control modules and ADAS sensors. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to clamp ±30 V transients before reaching MCU or signal conditioner ICs. Use Value: Prevents latch-up or permanent damage to 24 V rail-connected Hall-effect sensors and LIN bus transceivers during vehicle battery disconnection events. |
Use Scenario: Guarding RS-485, 24 V digital input, and analog current-loop (4–20 mA) terminals in programmable logic controllers exposed to factory floor EMI. IC Role / Device Role / Timing Role: Fast-response transient suppressor absorbing 1 kV/500 A surges induced by contactor switching or motor drive noise coupling. Use Value: Maintains signal integrity and prevents false triggering in safety-critical control logic by limiting transient voltage to ≤30.6 V during 10/1000 μs threats. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHY front-end and PoE-powered device inputs against lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on RJ45 jack side, coordinated with secondary GDT or polymer PTC for staged protection. Use Value: Withstands 1500 W pulses without degradation, preserving Ethernet link uptime in unshielded twisted-pair infrastructure. |
Use Scenario: Input-stage surge suppression in AC-DC adapters for smart home hubs and IoT gateways connected to mains-derived 24 V DC rails. IC Role / Device Role / Timing Role: Clamps fast-rising transients from nearby appliance switching or grid disturbances before bulk capacitor and controller IC. Use Value: Enables compliance with IEC 61000-4-5 Ed.3 Class B immunity testing using minimal board space and no active components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22CA | Lower peak power (400 W), same VWM (22 V), higher clamping (35.5 V at 11.3 A) | Restricted to lower-energy threats (e.g., ESD, local switching); unsuitable for lightning-level surges | Select SMAJ22CA only when system-level threat analysis confirms <400 W transient energy and board space constraints prohibit SMC footprint. |
| SMCJ22CA | Same package (SMC), higher peak power (3000 W), identical VWM/VBR, lower clamping (32.4 V at 93 A) | Over-spec'd for many 24 V industrial applications; requires higher PCB copper area for thermal management | Choose SMCJ22CA where legacy designs already use SMC footprint and require headroom for future surge standard upgrades (e.g., ISO 7637-2 Pulse 5b). |
Compared with SM15T22CA-E3/9AT, SMAJ22CA offers smaller size but insufficient energy handling for I/O line lightning protection, while SMCJ22CA delivers double the pulse power at the cost of tighter thermal design margins and higher component cost-making SM15T22CA-E3/9AT the optimal balance for 1500 W-rated 24 V systems.
Availability
SM15T22CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor units, industrial PLC I/O modules, and telecom line interface circuits requiring stable component supply with RoHS-compliant, commercial-grade delivery.
Supply support for SM15T22CA-E3/9AT 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 transient protection devices with emphasis on reliability, power handling, and automotive qualification.
The SM15T Series was developed specifically for high-energy transient suppression in harsh environments, targeting 24 V industrial and automotive systems where 1500 W surge capability and AEC-Q101 compliance are required.
FAQ
What is the clamping voltage of SM15T22CA-E3/9AT at its rated peak pulse current?
The SM15T22CA-E3/9AT 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 terminal, and represents the upper voltage limit imposed on protected circuitry during worst-case transient events.
Is SM15T22CA-E3/9AT suitable for automotive applications?
SM15T22CA-E3/9AT itself is RoHS-compliant commercial grade; however, the AEC-Q101-qualified variant SM15T22CAHE3_A/I is available for automotive use. The base SM15T22CA-E3/9AT shares identical electrical characteristics and SMC package but lacks the extended reliability validation required for under-hood deployment-engineers must specify the HE3 suffix for qualified automotive applications.
How does the bidirectional configuration of SM15T22CA-E3/9AT affect its PCB layout?
The SM15T22CA-E3/9AT has no polarity marking and identical electrical behavior in both directions, so PCB layout requires no orientation constraint. Designers may place it symmetrically across differential lines or across power/ground without regard to anode/cathode alignment-simplifying routing and reducing assembly errors compared to unidirectional TVS diodes.
What is the thermal resistance of SM15T22CA-E3/9AT, and how does it impact derating?
SM15T22CA-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W. At ambient temperatures above 25 °C, its peak pulse power must be derated per Figure 2 in the datasheet-e.g., at 85 °C ambient, usable PPPM drops to ~850 W, requiring verification against system-level surge profiles.
Does SM15T22CA-E3/9AT meet any industry surge immunity standards out-of-the-box?
SM15T22CA-E3/9AT is not certified to any immunity standard by itself, but its 1500 W (10/1000 μs) rating enables system-level compliance with IEC 61000-4-5 Level 4 (4 kV line-earth) when implemented with appropriate PCB layout (e.g., short traces, ground plane, and coordination with upstream filtering). Final validation must occur at the full product level.
SM15T22CA-E3/9AT 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:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T22CA-E3/9AT FAQ
1.How can I place an order for SM15T22CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T22CA-E3/9AT 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 SM15T22CA-E3/9AT reliable?
The price and inventory of SM15T22CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T22CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T22CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T22CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T22CA-E3/9AT?
SM15T22CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T22CA-E3/9AT 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 SM15T22CA-E3/9AT?
For technical support, including SM15T22CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T22CA-E3/9AT requirements.
6.How does Aetrix verify that SM15T22CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T22CA-E3/9AT 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 SM15T22CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T22CA-E3/9AT?
All SM15T22CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T22CA-E3/9AT, 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 SM15T22CA-E3/9AT part is unused and in its original packaging.
Return procedure for SM15T22CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T22CA-E3/9AT Tags
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