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Vishay General Semiconductor - Diodes Division SM15T33CAHE3/9AT
- Part No.:
- SM15T33CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T33CAHE3/9AT.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,417
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Product details
Overview
SM15T33CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 33 V standoff voltage (VWM), 37.5 V maximum clamping voltage at 33 A IPPM, and AEC-Q101 qualified for automotive applications. It protects signal lines and power rails in sensor units and I/O interfaces against lightning-induced and switching transients.
For engineers reviewing the SM15T33CAHE3/9AT datasheet, SM15T33CAHE3/9AT pinout, SM15T33CAHE3/9AT application, or SM15T33CAHE3/9AT equivalent, key selection criteria include bidirectional clamping capability, 33 V VWM tolerance, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and compatibility with 13" tape-and-reel delivery (9AT).
Technical Context
This bidirectional TVS diode operates symmetrically in both polarities, with breakdown voltage (VBR) of 31.4–34.7 V at 1 mA test current and clamps transients to ≤37.5 V at 33 A peak pulse current. Its low inductance and glass-passivated junction enable fast response (<1 ns) to ESD and surge events.
The device is rated for TJ = –65 °C to +150 °C, features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets MSL Level 1 (260 °C peak reflow). It is designed for surface-mount placement on 8.0 mm × 8.0 mm copper pads per terminal to sustain full 1500 W pulse rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 24 V nominal systems. |
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - Confirmed breakdown threshold ensures reliable turn-on within ±5% of nominal rating. |
| VC @ IPPM | 37.5 V at 33 A (10/1000 μs) - Clamping voltage limits downstream IC stress during worst-case surge events. |
| PPPM | 1500 W - Peak pulse power handling capacity validated under standard lightning surge waveform (IEC 61000-4-5). |
| RθJA | 75 °C/W - Thermal resistance determines junction temperature rise under sustained 6.5 W power dissipation. |
| AEC-Q101 | Qualified - Meets automotive-grade reliability requirements including HTOL, TC, and ESD testing per AEC specification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Reference terminal for unidirectional types; not marked on bidirectional devices like SM15T33CAHE3/9AT | Bidirectional symmetry means either terminal serves as anode or cathode depending on polarity of transient - no functional distinction between terminals. |
| Anode (unmarked end) | Reference terminal for unidirectional types; not marked on bidirectional devices like SM15T33CAHE3/9AT | Identical electrical behavior to cathode terminal; dual-terminal symmetry enables simplified PCB layout for AC-coupled or floating lines. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) without derating on standard PCB layouts. |
| Bidirectional clamping | Supports AC signal lines, differential buses (e.g., CAN, RS-485), and floating power domains without polarity constraints. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring extended temperature and lifetime reliability. |
| Low inductance design | Minimizes voltage overshoot during fast-rising transients (e.g., ESD >15 kV), critical for protecting high-speed interface ICs. |
Applications
| Automotive Sensor Protection | Industrial I/O Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp absorbing negative-going transients and positive spikes up to 1500 W. Use Value: Maintains signal integrity below 37.5 V clamping threshold while surviving repeated 10/1000 μs surges per ISO 7637-2 Pulse 5a. |
Use Scenario: Shielding PLC digital input channels connected to 24 V DC field wiring subject to inductive kickback from solenoids and contactors. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at connector entry point to shunt energy before reaching isolation barrier. Use Value: Limits voltage excursion to ≤37.5 V during 33 A surge, preventing damage to optocoupler input stages and microcontroller GPIOs. |
| Telecom Data Line Protection | Consumer USB Port ESD Suppression |
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul links subjected to lightning-induced common-mode surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Common-mode TVS pair (used differentially) clamping both lines simultaneously to ground. Use Value: Symmetrical 33 V VWM and 37.5 V VC ensure balanced clamping without skew, preserving differential signaling integrity. |
Use Scenario: Adding secondary-level surge protection on VBUS and D+/D− lines of USB 2.0 ports in smart home hubs exposed to user-handling ESD. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp limiting transient voltage across data lines and power rail. Use Value: With <100 pF typical junction capacitance, avoids signal degradation while meeting IEC 61000-4-2 ±15 kV contact discharge requirement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA-E3/57T | Same 33 V VWM and bidirectional configuration, but lower PPPM (400 W) and smaller SMA package (DO-214AC); RθJA = 110 °C/W. | Targeted at lower-energy threats (e.g., IEC 61000-4-2 ESD only); unsuitable for lightning-level surges requiring 1500 W rating. | Select when board space is constrained and surge threat level is limited to ESD or low-energy switching noise. |
| SMCJ33CAHE3/9AT | Same 33 V VWM, bidirectional, AEC-Q101 qualified, and SMC package, but higher PPPM (3000 W); VC = 53.3 V at 56.3 A. | Designed for severe industrial environments (e.g., factory automation with motor drives); clamping voltage 42% higher than SM15T33CAHE3/9AT. | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 and higher clamping voltage is acceptable for protected ICs. |
Compared with SMAJ33CA-E3/57T and SMCJ33CAHE3/9AT, SM15T33CAHE3/9AT delivers optimal balance of 1500 W surge capacity, 37.5 V clamping, and AEC-Q101 compliance in standard SMC footprint - making it ideal for mid-tier automotive and industrial applications where cost, size, and performance must coexist.
Availability
SM15T33CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom data line interfaces requiring stable component supply, AEC-Q101 qualification, and 13" tape-and-reel packaging (9AT).
Supply support for SM15T33CAHE3/9AT 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, TVS devices, and MOSFETs with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SM15T Series was developed specifically for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where 1500 W surge immunity and AEC-Q101 compliance are mandatory.
FAQ
What does the "CA" suffix indicate in SM15T33CAHE3/9AT?
The "CA" suffix denotes a bidirectional configuration, meaning SM15T33CAHE3/9AT provides symmetrical clamping for both positive and negative transients. Unlike unidirectional variants (e.g., SM15T33A), it has no polarity marking and functions identically regardless of voltage polarity applied across its terminals - essential for AC-coupled or floating signal paths.
Is SM15T33CAHE3/9AT suitable for automotive applications?
Yes, SM15T33CAHE3/9AT is AEC-Q101 qualified, as confirmed by Vishay's ordering code "HE3" suffix and documentation revision 09-Jan-2024. It undergoes stress testing for temperature cycling, high-temperature operating life, and ESD robustness required for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of SM15T33CAHE3/9AT under surge conditions?
The maximum clamping voltage (VC) of SM15T33CAHE3/9AT is 37.5 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 33 A. This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
How does the SMC (DO-214AB) package of SM15T33CAHE3/9AT affect thermal performance?
The SMC package of SM15T33CAHE3/9AT delivers RθJA = 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. This thermal resistance allows sustained operation at 6.5 W ambient power dissipation up to +50 °C, supporting reliable long-term use in enclosed industrial enclosures without forced airflow.
What does the "9AT" in SM15T33CAHE3/9AT signify?
The "9AT" denotes the packaging format: 13-inch diameter plastic tape-and-reel, containing 3500 units per reel. This format supports high-volume automated SMT placement and is compatible with standard pick-and-place equipment used in automotive and industrial electronics manufacturing lines.
SM15T33CAHE3/9AT 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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 33A
- 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)
SM15T33CAHE3/9AT FAQ
1.How can I place an order for SM15T33CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T33CAHE3/9AT 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 SM15T33CAHE3/9AT reliable?
The price and inventory of SM15T33CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T33CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T33CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T33CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T33CAHE3/9AT?
SM15T33CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T33CAHE3/9AT 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 SM15T33CAHE3/9AT?
For technical support, including SM15T33CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T33CAHE3/9AT requirements.
6.How does Aetrix verify that SM15T33CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T33CAHE3/9AT 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 SM15T33CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T33CAHE3/9AT?
All SM15T33CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T33CAHE3/9AT, 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 SM15T33CAHE3/9AT part is unused and in its original packaging.
Return procedure for SM15T33CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T33CAHE3/9AT Tags
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