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Vishay General Semiconductor - Diodes Division 1.5SMC43AHE3/9AT
- Part No.:
- 1.5SMC43AHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43AHE3/9AT.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,859
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Product details
Overview
1.5SMC43AHE3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 43 V breakdown voltage (VBR = 40.9–45.2 V at 1 mA), 36.8 V stand-off voltage (VWM), clamps to ≤59.3 V at 25.3 A peak pulse current, and delivers 1500 W peak pulse power with a 10/1000 µs waveform - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC43AHE3/9AT datasheet, 1.5SMC43AHE3/9AT pinout, 1.5SMC43AHE3/9AT application, or 1.5SMC43AHE3/9AT equivalent, this device serves as a RoHS-compliant, AEC-Q101-qualified unidirectional TVS in SMC (DO-214AB) package, optimized for lightning and inductive-switching surge suppression in high-reliability embedded systems.
Technical Context
This unidirectional TVS operates with a glass-passivated junction and exhibits fast response time (<1 ns), low incremental surge resistance, and excellent clamping ratio (VC/VBR ≈ 1.37). Its thermal resistance is RθJA = 75 °C/W and RθJL = 15 °C/W, enabling effective heat dissipation on standard PCB copper pads.
The device is rated for TJ = –65 to +150 °C operation, meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), and supports repetitive surge duty cycle of 0.01 % - confirming suitability for cyclic transient environments such as automotive powertrain control modules and industrial motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1 mA - defines precise reverse breakdown threshold for reliable triggering under overvoltage |
| VWM | 36.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | ≤59.3 V at 25.3 A - clamping voltage limits downstream IC stress during 10/1000 µs transients |
| PPPM | 1500 W - peak pulse power handling capacity with standardized 10/1000 µs waveform |
| IFSM | 200 A - single half-sine surge rating (8.3 ms), supporting high-energy inductive load switching events |
| TJ max | +150 °C - enables operation in under-hood automotive and high-temperature industrial enclosures |
| Package | SMC (DO-214AB) - surface-mount package with 8.0 mm × 8.0 mm copper pad footprint for thermal reliability |
Pinout & Package
Package: SMC (DO-214AB), molded in UL 94 V-0 compliant compound; matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Reverse-biased protection terminal | Connected to protected line (e.g., CAN_H, 12 V supply); band marks cathode end |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot across protected ICs, reducing risk of latch-up or gate oxide damage |
| MSL Level 1 moisture sensitivity | Allows direct placement without baking; compatible with standard SMT reflow profiles up to 260 °C peak |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and chassis ground to shunt transients before reaching ADC input. Use Value: Clamps 10/1000 µs surges to ≤59.3 V while maintaining <1 µA leakage at 36.8 V, preserving signal integrity and measurement accuracy. |
Use Scenario: Safeguarding digital input channels on programmable logic controllers interfacing with 24 V DC field devices subject to inductive kickback. IC Role / Device Role / Timing Role: Standoff protector on discrete optocoupler input side, triggered only during >36.8 V excursions. Use Value: 200 A IFSM rating handles repeated relay coil de-energization spikes without parametric shift or failure. |
| Telecom Power Rail Protection | Consumer USB Port ESD/Surge Guard |
Use Scenario: Secondary overvoltage protection on 48 V telecom power distribution boards downstream of primary DC/DC converters. IC Role / Device Role / Timing Role: Fast-acting clamp on +48 V bus against lightning-induced surges per IEC 61000-4-5. Use Value: 1500 W PPPM and 75 °C/W RθJA enable sustained surge absorption without thermal runaway on standard FR4 layouts. |
Use Scenario: Cost-effective front-end surge suppression for USB 2.0 VBUS lines in smart home hubs exposed to AC adapter fault conditions. IC Role / Device Role / Timing Role: Unidirectional TVS between VBUS and GND, activated only during overvoltage (not ESD alone). Use Value: 36.8 V VWM ensures no interference during normal 4.75–5.25 V operation while clamping 10/1000 µs faults to safe levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43A-E3/52T | Same VWM (36.8 V) and VC (59.3 V), but lower PPPM = 600 W in SMB package | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 compliance | Select when board space is constrained and surge energy is <600 W |
| 1.5KE43A | Through-hole DO-201 package; identical electrical specs but higher RθJA (~100 °C/W) and no AEC-Q101 qualification | Not suitable for automated SMT assembly or automotive under-hood use | Choose only for legacy through-hole designs or non-automotive prototyping |
Compared with SMBJ43A-E3/52T and 1.5KE43A, the 1.5SMC43AHE3/9AT uniquely combines AEC-Q101 qualification, 1500 W surge capability, and SMC package thermal performance - making it the preferred choice for production automotive and industrial SMT designs requiring validated reliability and high-energy clamping.
Availability
1.5SMC43AHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom power rail safeguarding requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC43AHE3/9AT 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, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in harsh environments - emphasizing AEC-Q101 qualification, high-power clamping, and robust thermal design for automotive and industrial power electronics.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC43AHE3/9AT?
The 1.5SMC43AHE3/9AT has a specified breakdown voltage range of 40.9 V to 45.2 V at 1 mA test current, corresponding to ±5 % tolerance around the nominal 43 V rating. This tight VBR window ensures consistent triggering behavior across production lots and temperature ranges from –65 °C to +150 °C.
Is the 1.5SMC43AHE3/9AT suitable for bidirectional transient protection?
No - the 1.5SMC43AHE3/9AT is a unidirectional TVS diode, identifiable by its cathode band marking. For bidirectional protection, Vishay offers the 1.5SMC43CA variant. Using the 1.5SMC43AHE3/9AT in reverse-biased configurations risks permanent damage due to forward conduction during negative transients.
Does the 1.5SMC43AHE3/9AT meet automotive qualification standards?
Yes - the "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification, verified per stress tests including HTRB, HTGB, TCT, and surge endurance. This makes the 1.5SMC43AHE3/9AT appropriate for automotive powertrain, body control, and ADAS subsystems where component reliability is mission-critical.
What is the maximum clamping voltage of the 1.5SMC43AHE3/9AT under surge conditions?
The 1.5SMC43AHE3/9AT clamps to a maximum of 59.3 V at its rated peak pulse current of 25.3 A (10/1000 µs waveform). This VC value is guaranteed across temperature and lifetime, ensuring downstream ICs see no more than 59.3 V during standardized surge events - critical for protecting 3.3 V or 5 V logic interfaces.
How does the SMC package of the 1.5SMC43AHE3/9AT improve thermal performance over SMB?
The SMC (DO-214AB) package of the 1.5SMC43AHE3/9AT provides lower thermal resistance (RθJA = 75 °C/W vs. ~100 °C/W for SMB) due to larger copper pad area (8.0 mm × 8.0 mm) and enhanced leadframe geometry. This allows the 1.5SMC43AHE3/9AT to sustain 1500 W surges without exceeding TJ = 150 °C, unlike smaller packages that thermally saturate faster.
1.5SMC43AHE3/9AT 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:
- 1
- Bidirectional Channels:
- -
- 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)
1.5SMC43AHE3/9AT FAQ
1.How can I place an order for 1.5SMC43AHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43AHE3/9AT 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 1.5SMC43AHE3/9AT reliable?
The price and inventory of 1.5SMC43AHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC43AHE3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC43AHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43AHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43AHE3/9AT?
1.5SMC43AHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43AHE3/9AT 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 1.5SMC43AHE3/9AT?
For technical support, including 1.5SMC43AHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43AHE3/9AT requirements.
6.How does Aetrix verify that 1.5SMC43AHE3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43AHE3/9AT 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 1.5SMC43AHE3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC43AHE3/9AT?
All 1.5SMC43AHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43AHE3/9AT, 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 1.5SMC43AHE3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC43AHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43AHE3/9AT Tags
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