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Vishay General Semiconductor - Diodes Division SM15T30CAHE3/57T
- Part No.:
- SM15T30CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T30CAHE3/57T.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,067
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Product details
Overview
SM15T30CAHE3/57T 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), 30 V standoff voltage (VWM), 33.2 V clamping voltage at 36 A IPPM, and AEC-Q101 qualified for automotive use. It protects signal lines and power rails in sensor units and I/O interfaces against lightning-induced and switching transients.
For engineers reviewing the SM15T30CAHE3/57T datasheet, SM15T30CAHE3/57T pinout, SM15T30CAHE3/57T application, or SM15T30CAHE3/57T equivalent, key selection criteria include bidirectional clamping capability, 30 V VWM tolerance, 33.2 V VC at 36 A, AEC-Q101 qualification status, and SMC package thermal resistance (RθJA = 75 °C/W).
Technical Context
This bidirectional TVS operates symmetrically in both polarities with identical breakdown (VBR min/max = 31.4–34.7 V) and clamping behavior. Its glass-passivated junction ensures stable leakage (<1 μA at VWM) and low inductance for fast transient response.
Designed for high-energy threat suppression, it sustains 1500 W peak pulse power per 10/1000 μs waveform under standard mounting (8.0 mm × 8.0 mm copper pads), with thermal derating above 25 °C per Fig. 2 and failure mode specified as short-circuit under overstress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 31.4 V / 34.7 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 33.2 V at 36 A - Clamped voltage during 10/1000 μs surge, limiting stress on downstream ICs |
| PPPM | 1500 W - Peak transient energy absorption capacity under standardized waveform |
| TJ max. | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
SM15T30CAHE3/57T uses the SMC (DO-214AB) package: a surface-mount, bidirectional device with no polarity marking; both terminals are electrically symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as cathode during positive transients and anode during negative transients; no fixed polarity |
| Cathode | Transient return path (bidirectional) | Identical to Anode terminal; symmetric conduction enables dual-direction clamping without orientation dependency |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints |
| 1500 W peak pulse rating | Withstands lightning-induced surges (IEC 61000-4-5 Level 4) on industrial I/O and automotive sensor lines |
| Low clamping ratio (VC/VBR ≈ 1.05) | Minimizes voltage overshoot during transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs/ICs |
| AEC-Q101 qualification | Validates robustness for automotive applications including engine control modules and ADAS sensor interfaces |
| MSL Level 1 (260 °C) | Supports lead-free reflow assembly without moisture sensitivity concerns or baking requirements |
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 units exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, responding within nanoseconds to transients exceeding 30 V. Use Value: Limits voltage seen by transceiver ICs to ≤33.2 V during 36 A surges, preventing permanent damage while maintaining signal integrity. | Use Scenario: Safeguarding PLC digital input modules connected to 24 V DC field wiring subject to relay coil kickback and lightning-induced surges. IC Role / Device Role / Timing Role: Standoff protector mounted at connector entry point, shunting transient energy to chassis ground before reaching controller ASIC. Use Value: Absorbs 1500 W pulses without degradation, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity standards. |
| Telecom Interface Protection | Consumer Device Power Rail Clamp |
Use Scenario: Shielding Ethernet PHY interface circuitry (e.g., RJ45 magnetics secondary side) from ESD and induced surges in PoE-powered access points. IC Role / Device Role / Timing Role: Secondary-side TVS placed across differential pairs, activated only during overvoltage events >30 V. Use Value: Maintains <1 μA leakage at 30 V, avoiding signal attenuation; clamps to 33.2 V to preserve PHY receiver common-mode range. | Use Scenario: Guarding 3.3 V/5 V power rails feeding microcontrollers and sensors in smart home hubs during hot-plug and USB port insertion events. IC Role / Device Role / Timing Role: Low-inductance bidirectional clamp between rail and ground, suppressing fast-rising spikes from cable coupling or switching noise. Use Value: Delivers sub-10 ns response time and 33.2 V clamping to prevent brownout resets or internal LDO overvoltage failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30CA | 600 W PPPM (vs. 1500 W); SMA package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy threats (IEC 61000-4-2 ESD only); unsuitable for lightning-level surges | Select when board space is constrained and threat level is limited to contact ESD or low-energy switching noise. |
| SMCJ30CA | Same SMC package and 1500 W rating; VWM = 30 V, VC = 48.4 V at 31 A (higher clamping voltage) | Higher clamping degrades protection margin for 3.3 V/5 V logic; less effective for sensitive analog front-ends | Prefer when cost is prioritized over clamping performance and system-level testing confirms 48.4 V VC is acceptable. |
Compared with SMAJ30CA and SMCJ30CA, SM15T30CAHE3/57T delivers superior energy handling (1500 W) and tighter clamping (33.2 V) in the same SMC footprint, while its AEC-Q101 qualification makes it the only option validated for automotive deployment among the three.
Availability
SM15T30CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom Ethernet ports, and consumer power rail protection requiring stable component supply and long-term lifecycle support.
Supply support for SM15T30CAHE3/57T 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 supplier of discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SM15T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where AEC-Q101 qualification and 1500 W surge capability are mandatory design requirements.
FAQ
What does the "CA" suffix indicate in SM15T30CAHE3/57T?
The "CA" suffix denotes a bidirectional configuration: SM15T30CAHE3/57T clamps transients of either polarity symmetrically, unlike unidirectional variants (e.g., SM15T30A). This eliminates polarity concerns during PCB layout and supports AC-coupled or floating signal lines. The device has no cathode band marking, confirming its bidirectional nature per Vishay's mechanical data.
Is SM15T30CAHE3/57T suitable for automotive applications?
Yes, SM15T30CAHE3/57T is AEC-Q101 qualified (as indicated by the "HE3" suffix), having passed stress tests including temperature cycling, high-temperature reverse bias, and ESD. It is explicitly intended for automotive use cases such as engine control unit sensor protection and ADAS camera module I/O lines, per Vishay's ordering information and application notes.
What is the clamping voltage of SM15T30CAHE3/57T under a 10/1000 μs surge?
SM15T30CAHE3/57T clamps to 33.2 V at 36 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per Figure 1 and Table on page 2 of Vishay document 88380 and defines the maximum voltage imposed on protected circuitry during worst-case surge conditions.
How does the SMC package of SM15T30CAHE3/57T affect thermal performance?
The SMC (DO-214AB) package provides RθJA = 75 °C/W (typical) when mounted on 8.0 mm × 8.0 mm copper pads per JEDEC standards. This enables reliable power dissipation up to 6.5 W at 50 °C ambient and supports sustained operation at TJ = 150 °C-critical for under-hood automotive placement where airflow is limited.
What is the maximum reverse leakage current for SM15T30CAHE3/57T at its standoff voltage?
At its 30 V standoff voltage (VWM), SM15T30CAHE3/57T exhibits a maximum reverse leakage current (ID) of 1.0 μA at 25 °C, as specified in the Electrical Characteristics table on page 2 of Vishay document 88380. This ultra-low leakage preserves signal integrity in high-impedance sensor and communication circuits.
SM15T30CAHE3/57T 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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.5V
- Current - Peak Pulse (10/1000µs):
- 36A
- 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)
SM15T30CAHE3/57T FAQ
1.How can I place an order for SM15T30CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T30CAHE3/57T 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 SM15T30CAHE3/57T reliable?
The price and inventory of SM15T30CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T30CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SM15T30CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T30CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T30CAHE3/57T?
SM15T30CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T30CAHE3/57T 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 SM15T30CAHE3/57T?
For technical support, including SM15T30CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T30CAHE3/57T requirements.
6.How does Aetrix verify that SM15T30CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T30CAHE3/57T 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 SM15T30CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SM15T30CAHE3/57T?
All SM15T30CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T30CAHE3/57T, 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 SM15T30CAHE3/57T part is unused and in its original packaging.
Return procedure for SM15T30CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T30CAHE3/57T Tags
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