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Vishay General Semiconductor - Diodes Division SM15T33CAHE3_A/I
- Part No.:
- SM15T33CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T33CAHE3_A/I.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,466
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Product details
Overview
SM15T33CAHE3_A/I 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), 33 V standoff voltage (VWM), and clamping voltage of 59.0 V at 169 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 SM15T33CAHE3_A/I datasheet, SM15T33CAHE3_A/I pinout, SM15T33CAHE3_A/I application, or SM15T33CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (1.79×VWM), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamped transient protector with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable leakage performance (<1.0 μA at VWM) and robust surge handling up to 200 A IFSM (unidirectional equivalent reference).
Thermal design relies on low RθJL = 15 °C/W and RθJA = 75 °C/W, enabling operation up to +150 °C junction temperature when mounted on 8.0 mm × 8.0 mm copper pads. The SMC package meets MSL Level 1 and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR min/max | 31.4 V / 34.7 V at 1.0 mA - Confirmed breakdown threshold ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM | 59.0 V at 169 A (10/1000 μs) - Clamping voltage limits downstream component stress during worst-case surge events. |
| PPPM | 1500 W - Peak pulse power rating determines survivability under standardized lightning-surge waveforms. |
| TJ max | +150 °C - Enables use in under-hood automotive environments and high-temperature industrial enclosures. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height for reliable reflow soldering. |
Pinout & Package
SMC (DO-214AB) package with two terminals: anode and cathode. Bidirectional configuration means no polarity marking; both terminals function identically under reverse or forward transient conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical conduction path during either polarity surge; connects to protected line or ground reference. |
| Cathode | Transient return path (bidirectional) | Electrically identical to anode in CA-series devices; no functional distinction-both terminals serve as clamping nodes. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards. |
| 1500 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges without degradation when properly mounted on recommended copper area. |
| Low clamping ratio (1.79×VWM) | Minimizes overvoltage exposure to downstream ICs such as CAN transceivers or microcontroller GPIOs. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture-related delamination risk. |
| Glass passivated junction | Ensures long-term stability of leakage current (<1.0 μA) and breakdown voltage across humidity and thermal stress. |
Applications
| Automotive Sensor Protection | Industrial I/O Line Protection |
|---|---|
Use Scenario: Protecting LIN/CAN bus nodes and analog sensor outputs (e.g., pressure, temperature) in engine control modules exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground to shunt transient energy before it reaches MCU input pins. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V interface circuits while maintaining signal integrity during normal operation. |
Use Scenario: Safeguarding PLC digital input channels connected to external field wiring subject to lightning-induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Fast-response transient suppressor installed at connector entry point to divert >1 kV spikes away from isolation barrier and controller logic. Use Value: Eliminates need for external series impedance or RC filtering, reducing BOM count and board space while meeting IEC 61000-4-4/5 immunity requirements. |
| Telecom Power Rail Protection | Consumer Device USB Port Protection |
Use Scenario: Shielding 48 V DC power feeds in PoE-powered network switches from induced surges on long Ethernet cable runs. IC Role / Device Role / Timing Role: High-power TVS placed across primary DC input rail to clamp common-mode transients before DC-DC converter stage. Use Value: Maintains system uptime by preventing shutdown or reset caused by transient-induced brownout on intermediate bus rails. |
Use Scenario: Guarding USB 2.0 data lines and VBUS in portable media players against ESD events (>8 kV contact discharge) and hot-plug transients. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor integrated into USB connector subcircuit to preserve signal rise/fall times. Use Value: Achieves USB-IF compliance without sacrificing data rate integrity, thanks to sub-100 pF junction capacitance at zero bias. |
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 | Lower peak pulse power (400 W), same VWM/VC, SMA package (smaller footprint, higher RθJA = 110 °C/W) | Suitable only for lower-energy threats (IEC 61000-4-2 ESD); not rated for lightning-level surges. | Select when board space is constrained and threat level is limited to human-body-model ESD or low-energy switching noise. |
| 1.5KE33CA | Through-hole DO-201 package, same electrical specs but higher mounting inductance and no AEC-Q101 qualification | Lacks automotive qualification and automated placement compatibility; requires wave solder or hand assembly. | Choose only for legacy through-hole designs where rework flexibility outweighs production efficiency and automotive compliance needs. |
Compared with SMAJ33CA-E3/57T and 1.5KE33CA, SM15T33CAHE3_A/I delivers higher surge robustness in SMT-compatible form with automotive-grade reliability-making it optimal for new designs targeting IEC 61000-4-5 Level 4 immunity and AEC-Q101 compliance.
Availability
SM15T33CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O line hardening, and telecom power rail safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SM15T33CAHE3_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, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SM15T Series is engineered for high-energy transient suppression in harsh environments-designed to meet AEC-Q101, IEC 61000-4-5, and UL 94 V-0 requirements for automotive, industrial, and telecom infrastructure applications.
FAQ
What is the clamping voltage of SM15T33CAHE3_A/I at its rated peak pulse current?
The SM15T33CAHE3_A/I has a maximum clamping voltage (VC) of 59.0 V when subjected to a 10/1000 μs waveform at 169 A peak pulse current (IPPM). This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuitry during surge events. The clamping performance remains consistent across temperature and lifetime when operated within specified derating curves.
Is SM15T33CAHE3_A/I suitable for automotive applications?
Yes, SM15T33CAHE3_A/I is AEC-Q101 qualified, as confirmed by its HE3 suffix and documentation in Vishay's SM15T series datasheet (Rev. 09-Jan-2024). It undergoes stress testing for temperature cycling, high-temperature reverse bias, and ESD per JEDEC standards. This makes SM15T33CAHE3_A/I appropriate for under-hood and cabin-mounted ECUs, ADAS sensors, and infotainment interfaces requiring certified reliability.
What does the "CA" suffix indicate in SM15T33CAHE3_A/I?
The "CA" suffix in SM15T33CAHE3_A/I denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SM15T33A), SM15T33CAHE3_A/I has no polarity marking and functions identically regardless of voltage polarity-ideal for AC-coupled lines or differential buses like CAN or RS-485.
What is the thermal resistance from junction to ambient for SM15T33CAHE3_A/I?
The typical thermal resistance from junction to ambient (RθJA) for SM15T33CAHE3_A/I is 75 °C/W, measured with the device mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes still air conditions and is used to calculate junction temperature rise under steady-state power dissipation. For accurate thermal modeling, RθJL = 15 °C/W should also be considered when heatsinking via PCB traces.
How does SM15T33CAHE3_A/I compare to unidirectional TVS diodes in circuit layout?
SM15T33CAHE3_A/I eliminates polarity orientation concerns during PCB layout and assembly since it lacks a cathode band marking and behaves identically in both directions. In contrast, unidirectional TVS diodes like SM15T33A require strict attention to anode/cathode placement relative to ground and signal routing. This simplifies design verification and reduces assembly errors-especially in dense layouts with multiple protected lines.
SM15T33CAHE3_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:
- -
- 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_A/I FAQ
1.How can I place an order for SM15T33CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T33CAHE3_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 SM15T33CAHE3_A/I reliable?
The price and inventory of SM15T33CAHE3_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 SM15T33CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM15T33CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T33CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T33CAHE3_A/I?
SM15T33CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T33CAHE3_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 SM15T33CAHE3_A/I?
For technical support, including SM15T33CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T33CAHE3_A/I requirements.
6.How does Aetrix verify that SM15T33CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T33CAHE3_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 SM15T33CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T33CAHE3_A/I?
All SM15T33CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T33CAHE3_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 SM15T33CAHE3_A/I part is unused and in its original packaging.
Return procedure for SM15T33CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T33CAHE3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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