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Vishay General Semiconductor - Diodes Division 1.5SMC39CAHE3/9AT
- Part No.:
- 1.5SMC39CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39CAHE3/9AT.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,383
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Product details
Overview
1.5SMC39CAHE3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 39 V standoff voltage (VWM), 43.3–47.8 V breakdown voltage (VBR), and 1500 W peak pulse power (10/1000 µs). It clamps transients to ≤53.9 V at 27.8 A, with <1 µA reverse leakage at VWM, and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the 1.5SMC39CAHE3/9AT datasheet, 1.5SMC39CAHE3/9AT pinout, 1.5SMC39CAHE3/9AT application, or 1.5SMC39CAHE3/9AT equivalent, this device serves as a robust, low-capacitance overvoltage clamp for bidirectional signal lines, power rails, and sensor interfaces where fast response (<1 ns), high surge immunity, and automotive-grade reliability are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping behavior in forward and reverse directions - critical for protecting AC-coupled or differential bus lines like CAN, LIN, or sensor bridges. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling consistent clamping under repetitive 10/1000 µs surges at 0.01% duty cycle.
The device is mounted on standard 8.0 mm × 8.0 mm copper pads per terminal, achieving thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), supporting continuous power dissipation up to 6.5 W at 50 °C ambient. It meets J-STD-020 MSL Level 1 and passes JESD201 Class 2 whisker testing, confirming suitability for lead-free reflow assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 33.3 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 37.1–41.0 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients without premature conduction. |
| VC (Clamping) | 53.9 V at 27.8 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; determines downstream IC survivability. |
| PPPM | 1500 W - Surge energy handling capacity; supports IEC 61000-4-5 Level 4 (4 kV) line-to-line or line-to-ground tests. |
| ID (Leakage) | ≤1.0 µA at 33.3 V - Minimal DC loading on signal/power paths; preserves accuracy in high-impedance sensor or reference circuits. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures without derating. |
| AEC-Q101 | Qualified - Validated for automotive use including temperature cycling, HTRB, and ESD; supports PPAP documentation. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads; dimensions 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); UL 94 V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal 1 | Bidirectional current entry point during positive or negative transients; no polarity marking on device body. |
| Cathode | Terminal 2 | Terminal 2 functions identically to Anode in bidirectional mode; terminals are electrically symmetrical and interchangeable. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity standards up to 4 kV without external series impedance. |
| Fast response time (<1 ns) | Clamps transients before sensitive downstream logic or analog circuitry can be damaged. |
| Glass-passivated junction | Ensures long-term parameter stability and low leakage drift over temperature and lifetime. |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free soldering without moisture-related popcorning or delamination. |
| AEC-Q101 qualification (HE3 suffix) | Validates reliability for automotive applications including engine control units, ADAS sensors, and body electronics. |
Applications
| Automotive Sensor Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting 5 V or 12 V analog sensor outputs (e.g., pressure, temperature, position) from load-dump and inductive switching spikes in engine bays. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to shunt surge energy before it reaches ADC input or signal conditioner. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump) and Pulse 1/2b (inductive kick), preventing sensor output saturation or latch-up. |
Use Scenario: Safeguarding CAN-H and CAN-L lines against ESD (IEC 61000-4-2 ±8 kV contact) and EFT (IEC 61000-4-4 ±2 kV) in vehicle network nodes. IC Role / Device Role / Timing Role: Low-capacitance (≈200 pF typical) bidirectional TVS placed across differential pair to suppress common-mode transients without distorting data eye. Use Value: Prevents bit errors and bus lockup while preserving CAN FD signaling integrity up to 5 Mbps due to symmetric clamping and sub-nanosecond response. |
| Industrial PLC I/O Protection | Telecom Line Interface Protection |
Use Scenario: Shielding 24 V digital input modules from field-wiring induced surges (lightning-induced, relay coil flyback) in factory automation cabinets. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each channel's input node, paired with series current-limiting resistor for coordinated protection. Use Value: Withstands repeated 1 kV/500 A surges per IEC 61000-4-5, extending module MTBF and eliminating need for fuse replacement after transient events. |
Use Scenario: Protecting Ethernet PHY or RS-485 transceivers connected to outdoor cabling exposed to lightning-induced ground potential rise. IC Role / Device Role / Timing Role: Bidirectional clamp on line-side transformer secondary or transceiver pins to limit common-mode voltage excursion during surge events. Use Value: Limits clamped voltage to ≤53.9 V, ensuring transceiver survival under ITU-T K.21 Basic Level (4 kV) and K.44 (10/700 µs) test conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Lower PPPM (600 W), smaller SMB package (DO-214AA), VWM = 33 V, VC = 53.3 V at 11.8 A | Reduced surge handling; suitable only for lower-energy threats (e.g., IEC 61000-4-2 ESD, not full IEC 61000-4-5) | Select when board space is constrained and surge requirements are ≤600 W; verify thermal margin with RθJA = 100 °C/W. |
| 1.5KE39CA | Through-hole TO-204AE (DO-15), same VWM/VC specs, but larger footprint and higher RθJA (60 °C/W) | Not suitable for automated SMT lines; requires wave solder or hand assembly; better heat sinking on PCB but less compatible with dense layouts | Choose for legacy through-hole designs or where mechanical robustness outweighs assembly efficiency; avoid for new SMT automotive designs. |
Compared with 1.5SMC39CAHE3/9AT, SMBJ33CA trades surge capacity and thermal performance for compact size, while 1.5KE39CA retains electrical equivalence but sacrifices SMT compatibility and AEC-Q101 qualification - making 1.5SMC39CAHE3/9AT the optimal choice for space-constrained, high-reliability automotive and industrial SMT applications.
Availability
1.5SMC39CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN bus nodes, industrial PLC I/O modules, and telecom line interfaces requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant packaging.
Supply support for 1.5SMC39CAHE3/9AT 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, precision, and application-specific optimization.
The 1.5SMC Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where robustness, AEC-Q101 validation, and consistent clamping performance are mandatory.
FAQ
What does the "CA" suffix indicate in 1.5SMC39CAHE3/9AT?
The "CA" suffix denotes a bidirectional configuration - meaning the 1.5SMC39CAHE3/9AT provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., 1.5SMC39A), it has no cathode marking and functions identically regardless of polarity applied across its terminals, making it ideal for AC-coupled or differential signal protection.
Is 1.5SMC39CAHE3/9AT suitable for protecting CAN FD physical layer interfaces?
Yes, 1.5SMC39CAHE3/9AT is suitable for CAN FD protection due to its bidirectional operation, low clamping voltage (53.9 V), and fast response (<1 ns), which prevents data corruption during ESD or EFT events. Its typical junction capacitance (~200 pF at zero bias) introduces minimal signal distortion at 5 Mbps, provided layout minimizes parasitic inductance and the device is placed adjacent to the connector.
How does the HE3 suffix affect the qualification and compliance of 1.5SMC39CAHE3/9AT?
The HE3 suffix confirms that 1.5SMC39CAHE3/9AT is RoHS-compliant and AEC-Q101 qualified - validated for automotive use across temperature cycling, highly accelerated life testing (HALT), and ESD robustness. This distinguishes it from commercial-grade E3 variants and ensures traceability, lot-level test reports, and extended temperature operation (-65 °C to +150 °C).
What is the maximum peak pulse current (IPPM) for 1.5SMC39CAHE3/9AT at its rated clamping voltage?
The 1.5SMC39CAHE3/9AT delivers an IPPM of 27.8 A when clamped to 53.9 V under the standard 10/1000 µs waveform. This value is derived from the PPPM rating (1500 W) and clamping voltage (VC), and is confirmed in Vishay's datasheet Table "ELECTRICAL CHARACTERISTICS" for part number 1.5SMC39CA.
Can 1.5SMC39CAHE3/9AT be used in place of a unidirectional TVS like 1.5SMC39A in a DC power rail application?
No - 1.5SMC39CAHE3/9AT should not replace a unidirectional TVS such as 1.5SMC39A on a DC rail unless the circuit is inherently bidirectional or AC-coupled. On a DC rail, the bidirectional device conducts during normal forward bias (e.g., >0.7 V), causing excessive leakage and potential failure. Use only unidirectional variants for DC power line protection.
1.5SMC39CAHE3/9AT 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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 27.8A
- 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)
1.5SMC39CAHE3/9AT FAQ
1.How can I place an order for 1.5SMC39CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39CAHE3/9AT 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 1.5SMC39CAHE3/9AT reliable?
The price and inventory of 1.5SMC39CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC39CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC39CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39CAHE3/9AT?
1.5SMC39CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39CAHE3/9AT 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 1.5SMC39CAHE3/9AT?
For technical support, including 1.5SMC39CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39CAHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC39CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39CAHE3/9AT 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 1.5SMC39CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC39CAHE3/9AT?
All 1.5SMC39CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39CAHE3/9AT, 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 1.5SMC39CAHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC39CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC39CAHE3/9AT Tags
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