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Vishay General Semiconductor - Diodes Division 1.5SMC43CA-E3/9AT
- Part No.:
- 1.5SMC43CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43CA-E3/9AT.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,890
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Product details
Overview
1.5SMC43CA-E3/9AT from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, designed for high-energy surge protection. It features a 36.8 V standoff voltage (VWM), 40.9–45.2 V breakdown voltage (VBR) at 1 mA, and clamps transients to ≤59.3 V at 25.3 A peak pulse current (IPPM) under 10/1000 µs waveform - ideal for safeguarding automotive sensor signal lines against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5SMC43CA-E3/9AT datasheet, 1.5SMC43CA-E3/9AT pinout, 1.5SMC43CA-E3/9AT application, or 1.5SMC43CA-E3/9AT equivalent, this device delivers verified 1500 W peak pulse power capability, AEC-Q101 qualification (via HE3/HM3 variants), RoHS-compliant matte tin plating, and MSL Level 1 moisture sensitivity - critical for automotive-grade PCB layout and high-reliability industrial power rail protection.
Technical Context
The 1.5SMC43CA-E3/9AT operates as a bidirectional clamping TVS diode with symmetrical avalanche breakdown in both polarities, enabling robust protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and low incremental surge resistance, supporting fast response time (<1.0 ns) and repeatable clamping performance across temperature.
Thermally, it exhibits RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), allowing effective heat dissipation when mounted on 8.0 mm × 8.0 mm copper pads per terminal. The device is rated for continuous operation from –65 °C to +150 °C junction temperature and supports repetitive 0.01% duty cycle surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 36.8 V - maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR min/max | 40.9 V / 45.2 V at IT = 1 mA - precise avalanche onset range used to validate design margin against system overvoltage thresholds |
| VC @ IPPM | ≤59.3 V at 25.3 A (10/1000 µs) - clamping voltage limiting transient energy delivered to downstream ICs or MOSFET gates |
| PPPM | 1500 W - peak surge power handling capacity; enables protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges with margin |
| IPPM | 25.3 A - peak pulse current capability directly determines minimum series impedance required for compliance with surge standards |
| TJ max | +150 °C - maximum junction temperature rating permitting use in under-hood automotive environments and high-ambient industrial enclosures |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 0.305" × 0.320" footprint and 0.126" height; compatible with automated pick-and-place |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | One terminal of symmetrical avalanche junction; conducts during positive voltage excursions beyond VBR |
| Cathode | Transient current entry (negative half-cycle) | Second terminal of symmetrical junction; conducts during negative voltage excursions beyond VBR; functionally identical to Anode in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), or ungrounded power rails without polarity concerns |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge immunity up to 4 kV open-circuit voltage with standard 2 Ω source impedance |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes let-through voltage stress on protected ICs, reducing risk of gate oxide damage in MOSFETs or latch-up in microcontrollers |
| AEC-Q101 qualified variants available | HE3/HM3 suffix versions meet automotive reliability requirements including temperature cycling, HTRB, and ESD testing |
| MSL Level 1 (260 °C peak reflow) | Permits standard lead-free reflow soldering without pre-baking; eliminates moisture-related popcorning during assembly |
Applications
| Automotive Sensor Signal Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamping transient spikes on 0–5 V or 0–10 V sensor outputs before they reach ADC inputs or signal conditioning amplifiers. Use Value: Prevents sensor data corruption and microcontroller reset events by limiting transients to ≤59.3 V while maintaining <1.0 µA leakage at 36.8 V operating voltage. |
Use Scenario: Safeguarding CAN_H/CAN_L differential pair in factory automation PLCs subjected to EFT bursts and nearby motor switching noise. IC Role / Device Role / Timing Role: Symmetrical clamping device placed across CAN bus lines to absorb common-mode surges without disrupting DC bias or signal integrity. Use Value: Ensures uninterrupted CAN communication during 4 kV IEC 61000-4-4 EFT events by clamping with sub-nanosecond response and minimal capacitance impact. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Front-end protection of DSL or PoE-powered Ethernet line cards against lightning-induced surges entering via RJ-11/RJ-45 jacks. IC Role / Device Role / Timing Role: Primary-level TVS placed between connector and isolation transformer to shunt >1 kV transients before reaching PHY ICs or magnetics. Use Value: Absorbs 1500 W surge energy without degradation, preserving transformer insulation and preventing PHY latch-up during field deployment. |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters for smart home devices, guarding against rectifier output overshoot or capacitor failure. IC Role / Device Role / Timing Role: Clamp diode across bulk capacitor output to limit transient spikes to safe levels for downstream DC-DC converters and USB controllers. Use Value: Eliminates need for additional Zener or crowbar circuits by providing integrated 36.8 V standoff and 59.3 V clamping in compact SMC package. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | Same VWM (36.8 V) and VC (59.3 V), but lower PPPM = 600 W and smaller SMB (DO-214AA) package | Limited to lower-energy surges (IEC 61000-4-5 Level 2); unsuitable for automotive under-hood or industrial mains-connected equipment | Select when board space is constrained and surge threat level is moderate (e.g., consumer USB ports) |
| 1.5KE43CA | Through-hole TO-218 package; identical electrical specs but higher thermal mass and manual assembly requirement | Preferred for prototyping, high-power legacy designs, or where reflow compatibility is not required | Choose for cost-sensitive industrial controls where automated SMT is unavailable or thermal derating margins exceed SMC limits |
Compared with SMBJ43CA and 1.5KE43CA, the 1.5SMC43CA-E3/9AT provides optimal balance of 1500 W surge capacity, SMT manufacturability, and automotive-grade reliability - making it the preferred choice for production-grade automotive and industrial PCBs requiring AEC-Q101 alignment and high-volume placement.
Availability
1.5SMC43CA-E3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN networks, telecom line cards, and consumer power adapter designs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC43CA-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in space-constrained, high-surge environments - emphasizing low-profile packaging, repeatable clamping, and AEC-Q101 qualification for mission-critical automotive electronics.
FAQ
What is the standoff voltage (VWM) of the 1.5SMC43CA-E3/9AT?
The 1.5SMC43CA-E3/9AT has a standoff voltage (VWM) of 36.8 V, meaning it remains in high-impedance state below this reverse voltage and begins conducting only when transient voltages exceed its breakdown threshold. This value ensures compatibility with 36 V nominal automotive systems and 24 V industrial control rails while maintaining low leakage (<1.0 µA) at rated temperature.
Is the 1.5SMC43CA-E3/9AT bidirectional or unidirectional?
The 1.5SMC43CA-E3/9AT is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping in both polarities, making it suitable for protecting AC-coupled signals, differential buses like CAN or RS-485, and floating power domains where polarity reversal may occur during transients.
Does the 1.5SMC43CA-E3/9AT meet AEC-Q101 qualification?
The base 1.5SMC43CA-E3/9AT is RoHS-compliant and commercial-grade; however, AEC-Q101 qualification is available in the HE3 and HM3 variants (e.g., 1.5SMC43CAHE3_A). These automotive-grade versions undergo extended reliability testing including temperature cycling, HTRB, and ESD per AEC-Q101 Rev D, and are marked with "HE3" or "HM3" suffixes.
What is the clamping voltage (VC) of the 1.5SMC43CA-E3/9AT at peak pulse current?
The 1.5SMC43CA-E3/9AT clamps to a maximum of 59.3 V at its rated peak pulse current (IPPM) of 25.3 A under the standardized 10/1000 µs waveform. This clamping voltage is measured across the device terminals during surge events and defines the upper voltage limit imposed on protected circuitry.
What package type does the 1.5SMC43CA-E3/9AT use?
The 1.5SMC43CA-E3/9AT uses the SMC (DO-214AB) surface-mount package - measuring 7.75 mm × 8.13 mm × 3.20 mm - with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Its MSL Level 1 rating allows direct placement into lead-free reflow ovens without pre-baking.
1.5SMC43CA-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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 25.3A
- 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)
1.5SMC43CA-E3/9AT FAQ
1.How can I place an order for 1.5SMC43CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43CA-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 1.5SMC43CA-E3/9AT reliable?
The price and inventory of 1.5SMC43CA-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 1.5SMC43CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC43CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43CA-E3/9AT?
1.5SMC43CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43CA-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 1.5SMC43CA-E3/9AT?
For technical support, including 1.5SMC43CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43CA-E3/9AT requirements.
6.How does Aetrix verify that 1.5SMC43CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43CA-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 1.5SMC43CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC43CA-E3/9AT?
All 1.5SMC43CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43CA-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 1.5SMC43CA-E3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC43CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43CA-E3/9AT Tags
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