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Vishay General Semiconductor - Diodes Division 1.5SMC30CA-E3/9AT
- Part No.:
- 1.5SMC30CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC30CA-E3/9AT.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,612
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Product details
Overview
1.5SMC30CA-E3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It delivers 1500 W peak pulse power (10/1000 μs), clamps at 41.4 V under 36.2 A peak pulse current, and maintains a 25.6 V stand-off voltage - enabling robust protection of 24 V automotive and industrial bus interfaces against lightning-induced transients and inductive switching spikes.
For engineers reviewing the 1.5SMC30CA-E3/9AT datasheet, 1.5SMC30CA-E3/9AT pinout, 1.5SMC30CA-E3/9AT application, or 1.5SMC30CA-E3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, SMC (DO-214AB) package thermal performance, junction temperature derating above 25 °C, and compliance with AEC-Q101 when specified with HE3/HM3 suffixes.
Technical Context
This TVS operates as a voltage-clamped shunt protector: during overvoltage events exceeding its breakdown threshold (28.5–31.5 V at 1 mA), it rapidly transitions to low-impedance conduction, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1 μA at 25.6 V) and repeatable clamping behavior across temperature.
The device supports bidirectional transient suppression without polarity sensitivity - critical for AC-coupled or differential signal lines - and exhibits low incremental surge resistance, enabling consistent clamping voltage (VC = 41.4 V) even under full-rated 36.2 A pulses. Thermal resistance (RθJA = 75 °C/W) and maximum junction temperature (150 °C) define safe continuous power dissipation limits in PCB layouts with 8.0 mm × 8.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains single high-energy surges typical of ISO 7637-2 Load Dump or IEC 61000-4-5 Level 4 without failure |
| Stand-off Voltage (VWM) | 25.6 V - defines maximum continuous reverse operating voltage before significant leakage begins; compatible with 24 V nominal systems |
| Breakdown Voltage (VBR) | 28.5–31.5 V at 1 mA - ensures reliable triggering margin above VWM while avoiding false triggering during normal operation |
| Clamping Voltage (VC) | 41.4 V at 36.2 A - maximum voltage seen by protected circuit during full-rated surge; determines required downstream voltage tolerance |
| Package | SMC (DO-214AB) - surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height; optimized for automated placement and thermal pad layout |
| Junction Temperature Range | −65 °C to +150 °C - enables deployment in under-hood automotive, industrial controls, and outdoor telecom equipment |
| RoHS Compliance | E3 suffix - lead-free, RoHS-compliant matte tin-plated terminals meeting J-STD-002 solderability and JESD 22-B102 whisker resistance Class 2 |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry point (bidirectional) | Conducts transient current in either direction; no cathode marking required on bidirectional variants like 1.5SMC30CA-E3/9AT |
| Cathode | Surge current exit point (bidirectional) | Functions identically to anode under reverse polarity; symmetric clamping ensures identical VC in both directions |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power rating | Enables protection against severe transients including 10/1000 μs lightning surges per IEC 61000-4-5 up to Level 4 (4 kV line-to-ground) |
| Glass passivated chip junction | Ensures long-term stability of breakdown voltage and leakage current across temperature cycling and humidity exposure |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving clamping predictability in high-dI/dt environments |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and reflow at peak temperature up to 260 °C without preconditioning - simplifies manufacturing flow |
| UL 497B recognition (QVGQ2) | Validates suitability for primary-side telecom and data line protection in certified end equipment requiring UL-listed protectors |
Applications
| Automotive Power Bus Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN physical layer transceivers and microcontroller I/O pins from load dump and alternator ripple in 24 V commercial vehicle ECUs. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between power rail and ground, triggered within nanoseconds of overvoltage onset. Use Value: Clamps 24 V bus transients to ≤41.4 V, preserving integrity of 3.3 V/5 V logic interfaces without requiring series impedance or timing delays. |
Use Scenario: Safeguarding analog outputs (4–20 mA) and digital sensor interfaces (I²C, SPI) in factory automation PLC modules exposed to motor drive noise. IC Role / Device Role / Timing Role: Bidirectional clamp across differential or single-ended signal pairs, absorbing ESD and inductive kickback without polarity constraints. Use Value: Symmetric clamping prevents signal inversion or DC offset shift during transients, maintaining measurement accuracy and communication reliability. |
| Telecom Data Line Surge Protection | Consumer Power Adapter Input Stage |
|
Use Scenario: Front-end protection of Ethernet PHYs, RS-485 transceivers, and DSL line drivers against induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Primary-level TVS on unshielded twisted-pair inputs, coordinated with secondary GDT or MOV stages for staged energy handling. Use Value: 1500 W rating handles multi-kA surges while low capacitance (<100 pF at 0 V) avoids signal integrity degradation at 100 Mbps+ data rates. |
Use Scenario: Secondary-side DC output protection in wall adapters and USB PD chargers against capacitor discharge and user-handling ESD. IC Role / Device Role / Timing Role: Final-stage clamp after bulk filtering and regulation, limiting residual overshoot to levels safe for connected devices. Use Value: 25.6 V stand-off accommodates 24 V adapter outputs; 41.4 V clamping ensures USB-C or legacy 5 V/12 V ports remain within absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA-T3G | Lower peak pulse power (600 W), SMB package (smaller thermal mass), higher RθJA (110 °C/W) | Better suited for space-constrained consumer electronics with lower surge threat profiles (IEC 61000-4-2 only) | Select when board area is limited and full 1500 W capability is not required; verify thermal margin under repeated surges. |
| 1.5KE30CA | Through-hole DO-201 package, identical electrical specs but larger footprint and manual assembly requirement | Preferred for prototyping, high-reliability military/aerospace designs, or where wave soldering is standard | Choose when automated SMT is unavailable or mechanical robustness under vibration is prioritized over board density. |
Compared with SMBJ30CA-T3G, the 1.5SMC30CA-E3/9AT provides 2.5× higher surge energy handling and superior thermal dissipation in SMT form; versus 1.5KE30CA, it offers identical protection performance in a smaller, production-optimized surface-mount package - making it optimal for high-volume automotive and industrial PCBs.
Availability
1.5SMC30CA-E3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, telecom infrastructure, and consumer power adapter development requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC30CA-E3/9AT 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, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive-grade qualification.
The 1.5SMC Series was engineered specifically for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where compact size, AEC-Q101 readiness, and repeatable clamping are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC30CA-E3/9AT under maximum rated surge current?
The 1.5SMC30CA-E3/9AT clamps to a maximum of 41.4 V when subjected to its full-rated peak pulse current of 36.2 A (10/1000 μs waveform). This value is measured at the device terminals under standardized test conditions with 8.0 mm × 8.0 mm copper pads per lead, and represents the highest voltage the protected circuit will experience during such a surge event. The 1.5SMC30CA-E3/9AT maintains this clamping performance bidirectionally due to its symmetrical construction.
Is the 1.5SMC30CA-E3/9AT suitable for automotive applications?
Yes - the 1.5SMC30CA-E3/9AT is RoHS-compliant and manufactured to Vishay's commercial-grade specifications; however, for AEC-Q101 qualified automotive use, the HE3 or HM3 suffix variants (e.g., 1.5SMC30CAHE3_A) must be selected. The 1.5SMC30CA-E3/9AT itself meets key automotive requirements including MSL Level 1, −65 °C to +150 °C operating range, and UL 497B recognition, but formal AEC-Q101 certification applies only to designated HE3/HM3 versions.
How does the bidirectional design of the 1.5SMC30CA-E3/9AT affect its circuit implementation?
The bidirectional design of the 1.5SMC30CA-E3/9AT eliminates polarity concerns during placement - no cathode band marking is present, and the device functions identically whether installed in either orientation. This simplifies layout for AC-coupled lines, differential buses (e.g., RS-485), or any application where voltage polarity reversal may occur. The 1.5SMC30CA-E3/9AT delivers matched breakdown (28.5–31.5 V) and clamping (41.4 V) characteristics in both directions, ensuring consistent protection without additional components.
What is the thermal resistance and how does it impact PCB layout for the 1.5SMC30CA-E3/9AT?
The 1.5SMC30CA-E3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. To maintain safe junction temperatures under repetitive surges or elevated ambient conditions, PCB layout must provide adequate copper area and thermal vias. Reducing pad size or omitting thermal relief increases RθJA, potentially causing premature thermal shutdown or parametric drift - always follow Vishay's recommended land pattern for the SMC (DO-214AB) package when designing with the 1.5SMC30CA-E3/9AT.
Does the 1.5SMC30CA-E3/9AT have a specified junction capacitance, and why does it matter?
The 1.5SMC30CA-E3/9AT does not specify junction capacitance in its primary datasheet tables, but typical values for the 1.5SMC30CA family are <100 pF at 0 V bias (per Fig. 4 in Document 88303). This low capacitance is critical for protecting high-speed signal lines (e.g., USB, Ethernet, CAN FD) because excessive capacitance degrades signal rise/fall times and causes reflections or jitter. For precision analog or RF-sensitive circuits, confirm actual capacitance via characterization or select variants explicitly rated for low-CJ performance when using the 1.5SMC30CA-E3/9AT.
1.5SMC30CA-E3/9AT 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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC30CA-E3/9AT FAQ
1.How can I place an order for 1.5SMC30CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC30CA-E3/9AT 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 1.5SMC30CA-E3/9AT reliable?
The price and inventory of 1.5SMC30CA-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC30CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC30CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC30CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC30CA-E3/9AT?
1.5SMC30CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC30CA-E3/9AT 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 1.5SMC30CA-E3/9AT?
For technical support, including 1.5SMC30CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC30CA-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC30CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC30CA-E3/9AT 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 1.5SMC30CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC30CA-E3/9AT?
All 1.5SMC30CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC30CA-E3/9AT, 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 1.5SMC30CA-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC30CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC30CA-E3/9AT Tags
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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