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Vishay General Semiconductor - Diodes Division SM15T30CAHE3_A/I
- Part No.:
- SM15T30CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T30CAHE3_A/I.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,596
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Product details
Overview
SM15T30CAHE3_A/I 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), 30 V standoff voltage (VWM), and clamping voltage of 41.5 V at 36 A peak pulse current. It protects sensitive ICs and MOSFETs against lightning-induced and inductive-switching transients in automotive and industrial power rails.
For engineers reviewing the SM15T30CAHE3_A/I datasheet, SM15T30CAHE3_A/I pinout, SM15T30CAHE3_A/I application, or SM15T30CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C junction temperature rating, low-inductance SMC package, and compliance with IEC 61000-4-2/4-5 surge immunity standards.
Technical Context
This device operates as a voltage-clamped overvoltage protection element across power or signal lines. Its bidirectional symmetry enables suppression of both positive and negative transients without polarity constraints, and its glass-passivated junction ensures stable breakdown behavior under repetitive surge stress.
Designed for high-energy threat environments, it delivers 1500 W peak pulse power with minimal clamping voltage overshoot (41.5 V at 36 A), and features thermal resistance of 75 °C/W (junction-to-ambient) when mounted on 8.0 mm × 8.0 mm copper pads - critical for sustained surge handling in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 28.5 V / 31.5 V at 1.0 mA - precise breakdown threshold ensuring reliable turn-on during overvoltage events |
| VC @ IPPM | 41.5 V at 36 A (10/1000 μs) - low clamping voltage limits stress on downstream components |
| PPPM | 1500 W - handles high-energy lightning and switching surges per IEC 61000-4-5 |
| TJ max | +150 °C - supports operation in under-hood automotive and industrial ambient conditions |
| Package | SMC (DO-214AB) - surface-mount, low-inductance, AEC-Q101 qualified package with MSL Level 1 rating |
| Qualification | AEC-Q101 qualified - validated for automotive electronics reliability per stress test requirements |
Pinout & Package
SM15T30CAHE3_A/I is housed in an SMC (DO-214AB) surface-mount package with two terminals: anode and cathode. As a bidirectional device, it has no polarity marking; both terminals are functionally symmetric and interchangeable in circuit placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts surge current during negative voltage excursions; symmetrical with cathode for bidirectional operation |
| Cathode | Transient current entry (positive half-cycle) | Conducts surge current during positive voltage excursions; electrically identical to anode in CA-series devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating lines without polarity concerns |
| 1500 W peak pulse power | Meets IEC 61000-4-5 Level 4 (4 kV surge) with margin in typical board layouts |
| Glass-passivated junction | Ensures stable VBR and low leakage (<1 μA at VWM) over temperature and lifetime |
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics applications requiring long-term reliability |
| Low inductance SMC package | Minimizes voltage overshoot during fast-rising transients (e.g., ESD, inductive kickback) |
Applications
| Automotive Power Rail Protection | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied ECUs from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across main power input to clamp ±40 V surges within 1 ns response time. Use Value: Limits voltage seen by downstream DC/DC converters and microcontrollers to ≤41.5 V, preventing latch-up or oxide damage. | Use Scenario: Shielding PLC analog input modules from inductive switching noise on 24 V sensor lines. IC Role / Device Role / Timing Role: Transient shunt connected between signal line and ground to divert >1 kA surge energy away from precision ADC front-end. Use Value: Maintains signal integrity by clamping transients before they propagate into op-amp buffers, reducing calibration drift risk. |
| Telecom Line Interface Protection | Consumer Appliance Power Supply Input |
Use Scenario: Safeguarding Ethernet PHY power pins against ESD and lightning-induced surges in PoE injectors. IC Role / Device Role / Timing Role: Bidirectional TVS deployed on +3.3 V and +5 V bias rails feeding magnetics and isolation transformers. Use Value: Prevents permanent damage to PHY ICs during hot-plug events while maintaining <10 nA leakage at 3.3 V standby. | Use Scenario: Overvoltage protection on AC-DC adapter primary-side rectifier output in smart home hubs. IC Role / Device Role / Timing Role: Clamping device placed across bulk capacitor to absorb 1500 W switching spikes from relay contact bounce. Use Value: Extends capacitor life by limiting voltage stress to 41.5 V during 10 ms transients, avoiding dielectric breakdown. |
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 peak pulse power (vs. 1500 W); same VWM/VC; SMA package (smaller footprint, higher RθJA) | Limited to lower-energy threats (IEC 61000-4-2 only); not suitable for lightning-level surges | Select when board space is constrained and surge threat level is ≤1 kV, 500 W. |
| SMCJ30CA | 1500 W rating; identical VWM, VBR, VC; same SMC package; AEC-Q101 not specified in base version | Requires verification of automotive qualification status per lot; may lack full AEC-Q101 documentation traceability | Prefer when AEC-Q101 is not mandatory and cost optimization is prioritized over certified qualification. |
Compared with SMAJ30CA and SMCJ30CA, SM15T30CAHE3_A/I provides guaranteed AEC-Q101 qualification, tighter VBR tolerance (±5 % vs. ±10 %), and consistent 1500 W surge capability with documented thermal derating curves - making it the preferred choice for automotive and high-reliability industrial designs where certification and performance margin are non-negotiable.
Availability
SM15T30CAHE3_A/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial motor drive I/O protection, telecom line interface protection requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SM15T30CAHE3_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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade validation.
The SM15T Series is designed specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where 1500 W surge immunity, AEC-Q101 qualification, and stable clamping performance are essential.
FAQ
What is the clamping voltage of SM15T30CAHE3_A/I at its rated peak pulse current?
The SM15T30CAHE3_A/I has a maximum clamping voltage (VC) of 41.5 V when subjected to its rated peak pulse current of 36 A under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88380 and defines the upper voltage limit imposed on protected circuits during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SM15T30CAHE3_A/I suitable for automotive applications?
Yes, SM15T30CAHE3_A/I is AEC-Q101 qualified, as confirmed by its "HE3" suffix and documentation in Vishay's SM15T series datasheet (Rev. 09-Jan-2024, Doc. #88380). It meets stress test requirements for temperature cycling, humidity, and surge robustness required in automotive powertrain and body electronics - making SM15T30CAHE3_A/I appropriate for under-hood and chassis-mounted systems.
How does the bidirectional configuration of SM15T30CAHE3_A/I affect circuit layout?
The bidirectional configuration of SM15T30CAHE3_A/I eliminates polarity sensitivity - no cathode band marking is present, and either terminal can connect to line or ground. This simplifies PCB layout by removing orientation constraints and enables use in AC-coupled, floating, or differential signal paths where voltage polarity reverses, such as RS-485 buses or transformer-isolated supplies.
What is the thermal resistance of SM15T30CAHE3_A/I, and how does it impact surge handling?
SM15T30CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads. This value directly governs temperature rise during repeated surges; for example, a 1500 W 10/1000 μs pulse causes negligible steady-state heating, but sustained multi-pulse events require thermal design consideration to avoid exceeding the 150 °C TJ max rating.
Does SM15T30CAHE3_A/I meet industry surge immunity standards?
Yes, SM15T30CAHE3_A/I is rated for 1500 W peak pulse power with a 10/1000 μs waveform - meeting or exceeding the energy requirements of IEC 61000-4-5 Level 4 (4 kV line-to-ground, 2 Ω source impedance) and IEC 61000-4-2 Level 4 (15 kV air, 8 kV contact discharge). Its low clamping voltage and fast response ensure compliance when implemented per Vishay's recommended pad layout.
SM15T30CAHE3_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):
- 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_A/I FAQ
1.How can I place an order for SM15T30CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T30CAHE3_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 SM15T30CAHE3_A/I reliable?
The price and inventory of SM15T30CAHE3_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 SM15T30CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SM15T30CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T30CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T30CAHE3_A/I?
SM15T30CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T30CAHE3_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 SM15T30CAHE3_A/I?
For technical support, including SM15T30CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T30CAHE3_A/I requirements.
6.How does Aetrix verify that SM15T30CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SM15T30CAHE3_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 SM15T30CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SM15T30CAHE3_A/I?
All SM15T30CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SM15T30CAHE3_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 SM15T30CAHE3_A/I part is unused and in its original packaging.
Return procedure for SM15T30CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T30CAHE3_A/I Tags
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