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Vishay General Semiconductor - Diodes Division 1.5SMC30AHE3/9AT
- Part No.:
- 1.5SMC30AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC30AHE3/9AT.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,821
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Product details
Overview
1.5SMC30AHE3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power (10/1000 μs), 30 V standoff voltage (VWM), and 41.4 V clamping voltage (VC) at 36.2 A peak pulse current. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the 1.5SMC30AHE3/9AT datasheet, 1.5SMC30AHE3/9AT pinout, 1.5SMC30AHE3/9AT application, or 1.5SMC30AHE3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 75 °C/W junction-to-ambient thermal resistance, and RoHS-compliant matte tin-plated leads suitable for automated placement on PCBs with 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device that conducts above its breakdown voltage (VBR = 28.5–31.5 V at 1 mA), limiting transient overvoltages to ≤41.4 V while absorbing up to 1500 W of surge energy. Its glass-passivated junction ensures stable performance under repetitive surges with 0.01% duty cycle.
Designed for unidirectional protection only, it features cathode-band polarity marking, low incremental surge resistance, and fast response time (<1 ns). It meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance and is qualified to AEC-Q101 for automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 25.6 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR (Breakdown Voltage) | 28.5–31.5 V at 1 mA - Voltage at which device enters avalanche conduction; ensures precise turn-on threshold. |
| VC (Clamping Voltage) | 41.4 V at IPPM = 36.2 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 1500 W - Surge energy-handling capability under standardized 10/1000 μs waveform; enables robust lightning/inductive-switching protection. |
| RθJA | 75 °C/W - Thermal resistance from junction to ambient air; requires minimum 8.0 mm × 8.0 mm copper pad layout for rated power dissipation. |
| TJ max. | +150 °C - Maximum allowable junction temperature; supports operation in under-hood automotive environments. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or low-side reference in unidirectional TVS configuration. | Provides return path for surge current during clamping; must be routed to lowest-impedance ground plane. |
| Cathode | Current exit terminal in forward bias; marked with band; connected to protected line (e.g., power rail or signal). | Defines polarity-sensitive connection point; incorrect orientation disables protection and risks short-circuit failure. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable avalanche characteristics and long-term reliability under repeated surge stress without parameter drift. |
| 1500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out with adequate PCB copper area. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body control, and ADAS modules requiring extended temperature and lifetime validation. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with high-volume automated assembly at 260 °C peak temperature. |
| Low profile SMC package | Reduces board space vs. larger DO-201 packages while maintaining thermal performance via optimized leadframe design. |
Applications
| Automotive Power Supply Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump transients (ISO 16750-2) and alternator switching spikes. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between power rail and chassis ground to shunt >100 V surges within nanoseconds. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to ≤41.4 V, preventing latch-up or gate oxide damage. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA current loops) in factory automation sensors from ESD and cable-induced surges. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted directly at connector interface to clamp transients before reaching op-amp input stage. Use Value: Maintains signal integrity with <1 nF junction capacitance and prevents false triggering or ADC saturation during 8 kV contact ESD events. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
|
Use Scenario: Safeguarding PoE-powered network switches and base stations from induced lightning surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary-level TVS on main DC input, coordinated with upstream fuses and secondary TVS for staged protection. Use Value: Absorbs 1500 W surge energy without degradation, enabling compliance with ITU-T K.21 heavy-duty protection requirements. |
Use Scenario: Adding robust overvoltage protection to USB Type-C VBUS lines in portable chargers and docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to suppress hot-swap transients and adapter faults. Use Value: Clamps fault voltages to 41.4 V before USB PD controller ICs reach absolute maximum ratings, avoiding permanent disablement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-E3/57T | Same VWM (25.6 V) and VC (41.4 V), but lower PPPM (400 W); SMA package (smaller footprint, higher RθJA = 110 °C/W). | Limited to lower-energy transients (IEC 61000-4-2 ESD only); unsuitable for ISO 16750-2 load dump. | Select when board space is constrained and surge threat level is moderate (e.g., consumer USB ports). |
| 1.5KE30A-T | Through-hole TO-204AA (DO-41); identical electrical specs but larger size, higher RθJA (100 °C/W), no AEC-Q101 qualification. | Not suitable for automated SMT lines or automotive qualification; requires manual insertion and wave soldering. | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMAJ30A-E3/57T and 1.5KE30A-T, the 1.5SMC30AHE3/9AT uniquely combines AEC-Q101 qualification, 1500 W surge rating, and SMC package for high-reliability automotive and industrial SMT production-without compromising clamping performance or thermal management.
Availability
1.5SMC30AHE3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power supplies, and consumer USB power delivery systems requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC30AHE3/9AT 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was developed to deliver high-power, surface-mount transient suppression for automotive, industrial, and telecom systems where space, thermal performance, and AEC-Q101 compliance are critical design constraints.
FAQ
What is the clamping voltage of the 1.5SMC30AHE3/9AT under maximum surge conditions?
The 1.5SMC30AHE3/9AT has a maximum clamping voltage (VC) of 41.4 V at 36.2 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value is guaranteed per Vishay's datasheet (Document Number: 88303, Rev. 09-Mar-2026) and defines the upper voltage limit imposed on protected circuits during worst-case transients. The 1.5SMC30AHE3/9AT maintains this clamping performance across its full operating temperature range (–65 °C to +150 °C).
Is the 1.5SMC30AHE3/9AT suitable for automotive applications?
Yes, the 1.5SMC30AHE3/9AT is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix. It meets stringent requirements for temperature cycling, mechanical shock, and humidity bias testing, making it appropriate for engine control units, body electronics, and ADAS power domains. The 1.5SMC30AHE3/9AT also complies with MSL Level 1 and supports 260 °C reflow, enabling direct integration into automotive SMT production lines.
What is the standoff voltage (VWM) and why does it matter for the 1.5SMC30AHE3/9AT?
The 1.5SMC30AHE3/9AT has a maximum reverse standoff voltage (VWM) of 25.6 V, meaning it remains non-conductive up to this DC or RMS voltage level. This parameter ensures no leakage current or power loss during normal operation while allowing sufficient margin below the 30 V nominal system voltage (e.g., 24 V automotive systems). Exceeding VWM risks premature conduction and thermal runaway, so the 1.5SMC30AHE3/9AT must be selected with ≥10% headroom relative to the operating rail.
How does the SMC (DO-214AB) package of the 1.5SMC30AHE3/9AT compare thermally to smaller packages like SMA?
The SMC package of the 1.5SMC30AHE3/9AT provides significantly better thermal performance than SMA: its typical junction-to-ambient thermal resistance (RθJA) is 75 °C/W versus ~110 °C/W for SMAJ-series devices, assuming identical 8.0 mm × 8.0 mm copper pads. This allows the 1.5SMC30AHE3/9AT to sustain higher surge repetition rates and dissipate heat more effectively in compact layouts. The 1.5SMC30AHE3/9AT's lower RθJA directly enables its 1500 W rating, unlike smaller packages limited to ≤400 W.
Does the 1.5SMC30AHE3/9AT have polarity markings, and how should it be oriented on the PCB?
Yes, the 1.5SMC30AHE3/9AT is unidirectional and features a cathode band marking on the body. During PCB layout, the banded end must connect to the line being protected (e.g., 12 V rail), while the anode connects to ground. Reversing this orientation renders the device ineffective for overvoltage protection and may cause catastrophic short-circuit failure under surge conditions. The 1.5SMC30AHE3/9AT's polarity is confirmed in Vishay's mechanical drawings and electrical test setup diagrams.
1.5SMC30AHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 36.2A
- 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)
1.5SMC30AHE3/9AT FAQ
1.How can I place an order for 1.5SMC30AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC30AHE3/9AT 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 1.5SMC30AHE3/9AT reliable?
The price and inventory of 1.5SMC30AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC30AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC30AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC30AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC30AHE3/9AT?
1.5SMC30AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC30AHE3/9AT 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 1.5SMC30AHE3/9AT?
For technical support, including 1.5SMC30AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC30AHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC30AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC30AHE3/9AT 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 1.5SMC30AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC30AHE3/9AT?
All 1.5SMC30AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC30AHE3/9AT, 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 1.5SMC30AHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC30AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC30AHE3/9AT Tags
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