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Vishay General Semiconductor - Diodes Division 1.5SMC30CAHE3/9AT
- Part No.:
- 1.5SMC30CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC30CAHE3/9AT.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,396
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Product details
Overview
1.5SMC30CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 30 V standoff voltage (VWM), 33.3 V minimum breakdown voltage (VBR), 41.4 V maximum clamping voltage (VC) at 36.2 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the 1.5SMC30CAHE3/9AT datasheet, 1.5SMC30CAHE3/9AT pinout, 1.5SMC30CAHE3/9AT application, or 1.5SMC30CAHE3/9AT equivalent, key selection criteria include bidirectional clamping performance under lightning surge (IEC 61000-4-5), AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and SMC (DO-214AB) package compatibility with automated SMT assembly.
Technical Context
This device operates as a voltage-clamped shunt protector: during transients exceeding VBR, it avalanches to divert surge current away from downstream circuitry while maintaining VC ≤ 41.4 V. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM).
Rated for repetitive 10/1000 μs surges at 0.01% duty cycle, it sustains 1500 W peak pulse power with derating above TA = 25 °C per Fig. 2. The bidirectional symmetry enables use on AC-coupled or floating lines without polarity concerns, and its MSL Level 1 rating supports lead-free reflow up to 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 30 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 33.3 V min - Voltage at which device enters avalanche; guarantees reliable triggering above system nominal voltage. |
| VC (Clamping) | 41.4 V max at IPPM = 36.2 A - Peak voltage seen by protected circuit during worst-case 10/1000 μs surge; determines stress on downstream ICs. |
| PPPM | 1500 W - Surge energy handling capacity with standard 10/1000 μs waveform; meets IEC 61000-4-5 Level 4 requirements when properly mounted. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on recommended 8.0 mm × 8.0 mm copper pads; informs board-level thermal design for sustained reliability. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suffix HE3 confirms qualification. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional - no polarity marking; symmetrical cathode/anode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry point (either direction) | Accepts transient current from either terminal; bidirectional symmetry eliminates orientation constraints during placement. |
| Cathode | Surge current exit point (either direction) | Completes low-impedance path to ground or return rail; identical electrical behavior to Anode due to bidirectional construction. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled, differential, or floating signal lines without external polarity management. |
| 1500 W peak pulse power | Withstands 10/1000 μs surges up to 36.2 A - sufficient for IEC 61000-4-5 Level 4 (4 kV) testing on 2 Ω source impedance. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units, ADAS sensors, and body electronics. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT processes without preconditioning or special handling. |
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1.0 μA), and long-term reliability under thermal cycling. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/FlexRay transceiver inputs and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt TVS diode placed directly at connector interface to clamp transients before reaching signal conditioning circuitry. Use Value: Limits voltage excursion to ≤41.4 V during 36.2 A surge, preventing latch-up or gate oxide damage in 3.3 V/5 V automotive microcontrollers and ADCs. |
Use Scenario: Safeguarding 24 V DC digital input modules against field-wiring induced surges and relay coil flyback in factory automation systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DIN-rail mounted I/O terminals, coordinated with upstream fuses and series impedance. Use Value: Absorbs 1500 W surge energy without degradation, enabling compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) immunity standards. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Secondary-side transient suppression on Ethernet PHY power rails (e.g., 3.3 V bias supply) and RS-485 bus lines exposed to ESD and lightning-induced coupling. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp across VCC-GND or differential data pairs to limit common-mode and differential surges. Use Value: Sub-1 ns response time and 41.4 V clamping ensure protected PHY ICs remain within absolute maximum ratings during ±8 kV contact ESD events. |
Use Scenario: Input-stage surge protection for USB-C PD adapters and multi-output wall adapters subjected to mains-borne transients per UL 1449. IC Role / Device Role / Timing Role: First-line defense across primary-side bulk capacitor or secondary-side 5–20 V output rails. Use Value: Withstands repetitive 10/1000 μs surges at 0.01% duty cycle, supporting long-term reliability in high-volume consumer power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Lower PPPM (600 W), same VWM (33 V), larger SMB package (DO-214AA), higher RθJA (110 °C/W) | Less suitable for high-energy surges (e.g., IEC 61000-4-5 Level 4); better for space-constrained but lower-power designs | Select when board layout limits pad area or surge energy requirements are ≤600 W. |
| 1.5KE33CA | Higher VWM (33 V), same clamping (53.3 V), axial-leaded DO-15 package, non-AEC-Q101 | Not suitable for automated SMT; lacks automotive qualification and thermal performance of SMC footprint | Choose only for through-hole prototyping or legacy repair where reflow compatibility is not required. |
Compared with SMBJ33CA and 1.5KE33CA, the 1.5SMC30CAHE3/9AT delivers 2.5× higher surge power handling in an AEC-Q101-qualified SMT package with superior thermal dissipation - making it the preferred choice for production automotive and industrial designs requiring validated reliability and high-energy clamping.
Availability
1.5SMC30CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter input stages requiring stable component supply, AEC-Q101 traceability, and consistent SMC (DO-214AB) packaging.
Supply support for 1.5SMC30CAHE3/9AT 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, efficiency, and application-specific validation.
The 1.5SMC Series targets high-energy transient suppression in automotive, industrial, and telecom infrastructure - engineered for AEC-Q101 compliance, robust surge handling, and seamless integration into automated SMT manufacturing flows.
FAQ
What is the clamping voltage of the 1.5SMC30CAHE3/9AT at its rated peak pulse current?
The 1.5SMC30CAHE3/9AT has a maximum clamping voltage (VC) of 41.4 V at its rated peak pulse current (IPPM) of 36.2 A, measured with a 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC30CAHE3/9AT maintains this clamping performance due to its tightly controlled avalanche characteristics and low incremental surge resistance.
Is the 1.5SMC30CAHE3/9AT qualified for automotive applications?
Yes, the 1.5SMC30CAHE3/9AT is AEC-Q101 qualified, as confirmed by the "HE3" suffix in its part number. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD, validating its suitability for under-hood and cabin electronics. The 1.5SMC30CAHE3/9AT is commonly used in automotive sensor modules, body control units, and infotainment power rails where reliability under harsh conditions is mandatory.
What package type does the 1.5SMC30CAHE3/9AT use, and what are its mounting requirements?
The 1.5SMC30CAHE3/9AT uses the SMC (DO-214AB) surface-mount package, with mechanical dimensions specified in the Vishay datasheet (Document Number 88303). For optimal thermal and surge performance, it must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This pad layout ensures the specified RθJA of 75 °C/W and supports full 1500 W pulse power dissipation without thermal runaway.
How does the bidirectional configuration of the 1.5SMC30CAHE3/9AT affect circuit design?
The bidirectional configuration of the 1.5SMC30CAHE3/9AT eliminates polarity sensitivity, allowing placement across AC-coupled lines, differential buses (e.g., RS-485), or floating grounds without orientation checks. Unlike unidirectional TVS diodes, the 1.5SMC30CAHE3/9AT provides symmetrical clamping in both directions - critical for protecting circuits where voltage transients can swing positive or negative relative to reference. No cathode band marking is present.
What is the maximum operating junction temperature for the 1.5SMC30CAHE3/9AT?
The 1.5SMC30CAHE3/9AT has a maximum operating junction temperature (TJ max) of +150 °C, enabling reliable operation in high-ambient environments such as automotive engine compartments or industrial control cabinets. Derating curves in Figure 2 of the datasheet specify allowable pulse power reduction above TA = 25 °C, ensuring the 1.5SMC30CAHE3/9AT remains within safe thermal limits during repetitive surge events.
1.5SMC30CAHE3/9AT 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:
- -
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC30CAHE3/9AT FAQ
1.How can I place an order for 1.5SMC30CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC30CAHE3/9AT 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 1.5SMC30CAHE3/9AT reliable?
The price and inventory of 1.5SMC30CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC30CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC30CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC30CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC30CAHE3/9AT?
1.5SMC30CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC30CAHE3/9AT 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 1.5SMC30CAHE3/9AT?
For technical support, including 1.5SMC30CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC30CAHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC30CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC30CAHE3/9AT 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 1.5SMC30CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC30CAHE3/9AT?
All 1.5SMC30CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC30CAHE3/9AT, 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 1.5SMC30CAHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC30CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC30CAHE3/9AT Tags
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