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Vishay General Semiconductor - Diodes Division SM15T33CA-E3/57T
- Part No.:
- SM15T33CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T33CA-E3/57T.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:911
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Product details
Overview
SM15T33CA-E3/57T 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), 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 SM15T33CA-E3/57T datasheet, SM15T33CA-E3/57T pinout, SM15T33CA-E3/57T application, or SM15T33CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, RoHS-compliant E3 termination, and compatibility with 8.0 mm × 8.0 mm copper pad layout per JEDEC standard.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 31.4–34.7 V (1 mA test current) and maximum clamping voltage (VC) of 59.0 V at 169 A (10/1000 μs waveform). Its low thermal resistance (RθJL = 15 °C/W) supports reliable energy dissipation during transient events without thermal runaway.
The device features glass-passivated junction, meets MSL Level 1 (260 °C reflow), and exhibits <1.0 μA reverse leakage at 28.2 V. Its failure mode under overstress is short-circuit - a critical safety behavior for fault-tolerant protection circuits in automotive and industrial systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28.2 V - Maximum continuous reverse operating voltage before significant leakage; defines upper limit of protected circuit's normal operating range. |
| VBR (min/max) | 31.4 V / 34.7 V at 1 mA - Ensures consistent breakdown initiation across production lots; guarantees clamping starts within defined voltage window. |
| VC @ IPPM | 59.0 V at 169 A (10/1000 μs) - Peak voltage seen by downstream ICs during worst-case surge; directly limits stress on MOSFET gates or MCU I/O pins. |
| PPPM | 1500 W - Energy-handling capacity for standardized lightning-surge waveforms; validates suitability for IEC 61000-4-5 Level 4 compliance designs. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and high-ambient industrial enclosures without derating. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
SMC (DO-214AB) package with two terminals: no polarity marking for bidirectional configuration. Cathode/anode designation does not apply; terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient Current Input/Output | Carries full surge current in either direction; connected to protected line (e.g., CAN_H or RS-485 A). |
| Terminal 2 | Transient Current Input/Output | Completes symmetrical clamping path; tied to reference plane (e.g., chassis ground or signal common). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., USB D+/D−, RS-485) without polarity concerns. |
| 1500 W peak pulse rating | Supports IEC 61000-4-5 4th-level surge immunity (4 kV line-earth, 2 kV line-line) when mounted per recommended 8.0 mm × 8.0 mm copper pads. |
| AEC-Q101 qualified option | HE3 suffix variant available; validates reliability for automotive powertrain and ADAS sensor modules requiring zero-defect operation. |
| Low clamping ratio (VC/VWM = 2.09) | Minimizes overvoltage exposure to downstream components - critical for 3.3 V or 5 V logic interfacing with 24 V industrial buses. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting wheel speed sensor outputs exposed to load-dump and alternator ripple in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output line and chassis ground to clamp ±100 V transients. Use Value: Prevents latch-up or gate oxide damage in downstream comparator or microcontroller input stages during engine cranking events. |
Use Scenario: Safeguarding RS-485 transceiver pins (A/B) in factory automation PLCs subjected to motor drive noise and cable ESD. IC Role / Device Role / Timing Role: Differential-line TVS absorbing common-mode surges up to ±30 A while maintaining signal integrity below 25 MHz. Use Value: Eliminates need for separate unidirectional devices on each line, reducing BOM count and PCB area by 50% versus discrete solutions. |
| Consumer USB Port Protection | Telecom Power Feeding Line |
Use Scenario: Shielding USB 2.0 data lines in set-top boxes from human-body ESD (±8 kV contact discharge) and hot-plug transients. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed inline with D+ and D− traces before USB controller PHY. Use Value: Maintains signal rise/fall times <1 ns due to sub-100 pF junction capacitance at 0 V bias - preserves USB 2.0 eye diagram compliance. |
Use Scenario: Protecting 48 V phantom power feed lines in VoIP phones and IP cameras against lightning-induced surges on PoE-enabled Ethernet cables. IC Role / Device Role / Timing Role: High-energy TVS shunting surge current away from DC-DC converter input stage during outdoor installation events. Use Value: Withstands 1500 W pulses without degradation, enabling single-stage protection architecture instead of cascaded MOV+TVS designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ33CA | Lower peak pulse power (400 W), smaller SMA package (DO-214AC), higher clamping voltage (64.3 V at 6.3 A). | Suitable for lower-energy threats (IEC 61000-4-2 ESD only); not rated for lightning-level surges. | Select SMAJ33CA only for space-constrained consumer electronics where 1500 W capability is unnecessary. |
| SMCJ33CA | Same SMC package, identical 1500 W rating, but VWM = 28.2 V and VC = 59.0 V match exactly; differs in packaging code (M3 vs E3) and halogen-free status. | Functionally interchangeable for commercial-grade designs; M3 suffix adds halogen-free compliance. | SMCJ33CA-M3/57T is a direct material-compliance alternative if halogen-free requirement applies. |
Compared with SM15T33CA-E3/57T, SMAJ33CA offers reduced surge handling in a smaller footprint, while SMCJ33CA matches all electrical specs but varies in environmental compliance - making it a drop-in substitute only when halogen-free materials are mandated.
Availability
SM15T33CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 networks, and telecom power feeding lines requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for SM15T33CA-E3/57T 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 and automotive-grade qualification.
The SM15T Series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be predictable and safe.
FAQ
What is the clamping voltage of SM15T33CA-E3/57T at its rated peak pulse current?
The SM15T33CA-E3/57T has a maximum clamping voltage (VC) of 59.0 V when subjected to a 10/1000 μs waveform at 169 A peak pulse current. This value is measured under standardized test conditions with 0.31" × 0.31" copper pads per terminal and represents the upper voltage limit imposed on protected circuitry during surge events.
Is SM15T33CA-E3/57T suitable for automotive applications?
Yes - the SM15T33CA-E3/57T is RoHS-compliant and commercial-grade; an AEC-Q101 qualified version (SM15T33CAHE3) is available with HE3 suffix. While SM15T33CA-E3/57T itself is not AEC-Q101 certified, its construction, thermal performance (TJ max = +150 °C), and robustness make it widely deployed in non-safety-critical automotive subsystems such as body control modules and infotainment I/O protection.
What does the "CA" suffix indicate in SM15T33CA-E3/57T?
The "CA" suffix in SM15T33CA-E3/57T denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SM15T33A), SM15T33CA-E3/57T has no cathode marking and functions identically regardless of voltage polarity applied across its terminals.
What is the standoff voltage (VWM) of SM15T33CA-E3/57T and why does it matter?
The standoff voltage (VWM) of SM15T33CA-E3/57T is 28.2 V - the maximum continuous reverse voltage the device can withstand without entering breakdown. This parameter ensures the TVS remains non-conductive during normal operation, preventing power loss or signal distortion while still triggering reliably during overvoltage events exceeding this threshold.
How is SM15T33CA-E3/57T packaged and what are its mounting requirements?
SM15T33CA-E3/57T uses the SMC (DO-214AB) surface-mount package with matte tin-plated leads. For optimal thermal and surge performance, it must be mounted on minimum 8.0 mm × 8.0 mm copper pads per terminal per JEDEC standards. The device meets MSL Level 1 and is compatible with standard reflow profiles peaking at 260 °C.
SM15T33CA-E3/57T 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:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T33CA-E3/57T FAQ
1.How can I place an order for SM15T33CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T33CA-E3/57T 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 SM15T33CA-E3/57T reliable?
The price and inventory of SM15T33CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T33CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SM15T33CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T33CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T33CA-E3/57T?
SM15T33CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T33CA-E3/57T 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 SM15T33CA-E3/57T?
For technical support, including SM15T33CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T33CA-E3/57T requirements.
6.How does Aetrix verify that SM15T33CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T33CA-E3/57T 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 SM15T33CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SM15T33CA-E3/57T?
All SM15T33CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T33CA-E3/57T, 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 SM15T33CA-E3/57T part is unused and in its original packaging.
Return procedure for SM15T33CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T33CA-E3/57T Tags
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