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Vishay General Semiconductor - Diodes Division 1.5SMC43CAHE3/9AT
- Part No.:
- 1.5SMC43CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43CAHE3/9AT.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,740
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Product details
Overview
1.5SMC43CAHE3/9AT 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 43 V standoff voltage (VWM), 47.8 V minimum breakdown voltage (VBR), 59.3 V maximum clamping voltage (VC) at 25.3 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 1.5SMC43CAHE3/9AT datasheet, 1.5SMC43CAHE3/9AT pinout, 1.5SMC43CAHE3/9AT application, or 1.5SMC43CAHE3/9AT equivalent, key selection considerations include bidirectional clamping symmetry, AEC-Q101 qualification for automotive use, SMC (DO-214AB) package thermal performance, and compliance with UL 497B surge protector requirements.
Technical Context
This device operates as a voltage-clamped shunt protector: during transients exceeding VWM (43 V), it avalanches symmetrically in both directions to clamp the line voltage to ≤59.3 V while diverting up to 25.3 A (10/1000 μs). Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 μA at VWM).
Thermally, it delivers 6.5 W steady-state dissipation on an infinite heatsink at 50 °C and exhibits RθJA = 75 °C/W and RθJL = 15 °C/W. The HE3 suffix confirms RoHS-compliance and AEC-Q101 qualification - validated for automotive underhood environments up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43 V - maximum continuous reverse operating voltage before conduction begins |
| VBR (Breakdown Voltage) | 47.8 V min at IT = 1.0 mA - guaranteed avalanche initiation threshold in both directions |
| VC (Clamping Voltage) | 59.3 V max at IPPM = 25.3 A - peak line voltage seen by protected circuit during worst-case surge |
| PPPM (Peak Pulse Power) | 1500 W - surge energy handling capacity per 10/1000 μs waveform, enabling lightning/inductive-switching immunity |
| TJ max | 150 °C - maximum junction temperature, supporting operation in under-hood automotive and industrial enclosures |
| Package | SMC (DO-214AB) - surface-mount package with 8.0 mm × 8.0 mm copper pad thermal footprint and MSL Level 1 rating |
| AEC-Q101 Qualified | Yes - qualified for automotive applications including engine control units and ADAS sensor interfaces |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional operation; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No polarity marking; terminals interchangeable - enables placement without orientation check in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-ground) without cascaded stages |
| Low clamping ratio (VC/VBR ≈ 1.24) | Minimizes let-through voltage stress on downstream MOSFETs or interface ICs during transients |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge lifetime testing |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
| Glass-passivated junction | Ensures stable VBR over time and temperature, with <1.0 μA IR at 43 V (25 °C) |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog front-ends in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional shunt TVS placed directly across differential signal pairs or supply rails to clamp fast-rising transients. Use Value: Maintains signal integrity below 59.3 V during 25.3 A surges, preventing latch-up or damage to 5 V/3.3 V interface ICs. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers subjected to field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp at connector entry point, coordinated with series impedance and filtering. Use Value: Limits transient voltage to safe levels within 1 ns response time, preserving ADC accuracy and isolation barrier integrity. |
| Telecom Line Interface Protection | Power Supply Rail Clamping |
Use Scenario: Shielding Ethernet PHYs, RS-485 transceivers, and PoE injectors from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-line bidirectional suppressor on data lines, upstream of common-mode chokes and secondary TVS arrays. Use Value: Withstands repetitive 1500 W surges while maintaining <1.0 μA leakage at 43 V - critical for low-power remote nodes. |
Use Scenario: Clamping 12 V/24 V DC input rails in embedded power supplies against inductive switching spikes from relays or motors. IC Role / Device Role / Timing Role: Parallel-connected rail protector with low dynamic impedance to minimize voltage overshoot during fast dV/dt events. Use Value: Delivers 6.5 W continuous dissipation and 1500 W transient handling - eliminates need for derated higher-voltage alternatives. |
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 (43 V), lower PPPM (600 W), SMB package (smaller thermal mass, RθJA = 85 °C/W) | Limited to lower-energy surges (IEC 61000-4-5 Level 2); unsuitable for automotive underhood where 1500 W is required | Select only when board space is constrained and surge threat level is ≤600 W |
| 1.5KE43CA | Same VWM and PPPM, but through-hole DO-201 package - no SMT compatibility, higher inductance, manual assembly only | Not viable for automated high-volume production; incompatible with modern SMT-only PCBs | Choose only for legacy repair, prototyping, or non-automated assembly contexts |
Compared with SMBJ43CA and 1.5KE43CA, the 1.5SMC43CAHE3/9AT uniquely combines AEC-Q101 qualification, 1500 W surge rating, and SMC package thermal performance - making it the only option qualified for automotive-grade SMT production with full IEC 61000-4-5 Level 4 compliance.
Availability
1.5SMC43CAHE3/9AT is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC development, and telecom infrastructure projects requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC43CAHE3/9AT 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, power handling, and automotive qualification.
The 1.5SMC Series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 compliance, and standardized SMC packaging are mandatory.
FAQ
What does the "CA" suffix mean in 1.5SMC43CAHE3/9AT?
The "CA" suffix in 1.5SMC43CAHE3/9AT denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both forward and reverse directions, with identical VWM (43 V), VBR, and VC characteristics across polarity. This is essential for protecting AC-coupled or differential signal lines where voltage polarity reverses.
Is 1.5SMC43CAHE3/9AT suitable for automotive applications?
Yes, 1.5SMC43CAHE3/9AT is AEC-Q101 qualified (confirmed by the HE3 suffix) and rated for operation from –65 °C to +150 °C junction temperature. It is explicitly designed for automotive use cases including engine control units, ADAS sensors, and infotainment power rails - meeting requirements for thermal cycling, humidity resistance, and surge lifetime.
What is the clamping voltage of 1.5SMC43CAHE3/9AT at its rated peak pulse current?
The 1.5SMC43CAHE3/9AT has a maximum clamping voltage (VC) of 59.3 V at its rated peak pulse current (IPPM) of 25.3 A, measured using the standard 10/1000 μs double-exponential waveform. This value ensures protected circuits remain below critical voltage thresholds during high-energy transients.
How does the SMC (DO-214AB) package of 1.5SMC43CAHE3/9AT compare thermally to smaller packages like SMB?
The SMC (DO-214AB) package used by 1.5SMC43CAHE3/9AT offers RθJA = 75 °C/W and RθJL = 15 °C/W - significantly better than SMB's ~85 °C/W - due to larger copper pad area (8.0 mm × 8.0 mm) and lower thermal resistance to leads. This enables sustained 6.5 W power dissipation and reliable 1500 W surge handling without thermal runaway.
Does 1.5SMC43CAHE3/9AT require orientation during PCB placement?
No, 1.5SMC43CAHE3/9AT does not require orientation during PCB placement because it is a bidirectional device with no polarity marking. The SMC package has symmetrical terminals - both ends function identically - eliminating assembly errors and simplifying automated pick-and-place programming.
1.5SMC43CAHE3/9AT 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC43CAHE3/9AT FAQ
1.How can I place an order for 1.5SMC43CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43CAHE3/9AT 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 1.5SMC43CAHE3/9AT reliable?
The price and inventory of 1.5SMC43CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC43CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC43CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43CAHE3/9AT?
1.5SMC43CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43CAHE3/9AT 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 1.5SMC43CAHE3/9AT?
For technical support, including 1.5SMC43CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43CAHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC43CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43CAHE3/9AT 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 1.5SMC43CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC43CAHE3/9AT?
All 1.5SMC43CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43CAHE3/9AT, 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 1.5SMC43CAHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC43CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43CAHE3/9AT Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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