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Vishay General Semiconductor - Diodes Division 1.5SMC43AHE3_A/I
- Part No.:
- 1.5SMC43AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43AHE3_A/I.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,162
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Product details
Overview
1.5SMC43AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features 43 V breakdown voltage (VBR = 40.9–45.2 V at IT = 1.0 mA), 36.8 V stand-off voltage (VWM), clamps to ≤59.3 V at 25.3 A peak pulse current (10/1000 μs), and delivers 1500 W peak pulse power. It is AEC-Q101 qualified and used in automotive sensor interface protection.
For engineers reviewing the 1.5SMC43AHE3_A/I datasheet, 1.5SMC43AHE3_A/I pinout, 1.5SMC43AHE3_A/I application, or 1.5SMC43AHE3_A/I equivalent, this page provides verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, and validated alternatives for automotive-grade TVS selection.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM (36.8 V), it transitions rapidly from high-impedance to low-impedance state, diverting transient energy to ground. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 μA at VWM).
It complies with 10/1000 μs surge waveform standards per IEC 61000-4-5 and supports repetitive surges at 0.01% duty cycle. Thermal resistance is RθJA = 75 °C/W (on recommended 8.0 mm × 8.0 mm copper pads), enabling reliable operation up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at IT = 1.0 mA - defines precise breakdown threshold for accurate overvoltage triggering |
| VWM | 36.8 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | ≤59.3 V at 25.3 A (10/1000 μs) - clamping voltage limiting stress on protected ICs during surge events |
| PPPM | 1500 W - peak pulse power handling capacity for lightning or inductive-switching transients |
| IPPM | 25.3 A - maximum non-repetitive surge current the device safely clamps without failure |
| TJ max. | +150 °C - junction temperature limit supporting under-hood automotive environments |
| Package | SMC (DO-214AB) - surface-mount package with 7.75 mm × 6.22 mm footprint and 2.62 mm height for automated assembly |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C reflow peak). Polarity marked by cathode band; anode and cathode terminals are axially oriented.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection to protected line | Reverse-biased terminal; connects to supply rail or signal line requiring clamping to ground |
| Anode | Low-side connection to reference (GND) | Common return path for surge current; must be routed with low-inductance grounding |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| 1500 W peak pulse power (10/1000 μs) | Withstands ISO 7637-2 Pulse 1/2a/5a transients without degradation |
| Glass-passivated junction | Ensures stable VBR tolerance and <1.0 μA leakage at VWM, critical for low-power sensor rails |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD or load dump) |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking, reducing manufacturing cost and risk |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 36 V battery-fed ECUs against load dump transients (ISO 16750-2, 12 V system). IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power input and chassis ground. Use Value: Clamps 120 V/100 ms load dump to ≤59.3 V, preventing damage to downstream DC/DC converters and microcontrollers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Reverse-biased TVS on 4–20 mA loop output line, referenced to system ground. Use Value: Limits induced surges from nearby motor switching to <60 V, preserving ADC input integrity and calibration stability. |
| Telecom DC Power Input | Consumer USB-C Power Delivery |
Use Scenario: Input stage protection for PoE-powered network switches operating from 48 V DC supply. IC Role / Device Role / Timing Role: Primary overvoltage clamp on PSE-side DC input before filtering and regulation. Use Value: Absorbs 1500 W surges from cable coupling while maintaining VWM margin above 48 V nominal, avoiding false triggering. |
Use Scenario: Secondary-level surge suppression on USB-C VBUS line after buck converter in portable chargers. IC Role / Device Role / Timing Role: Unidirectional TVS between VBUS and GND, downstream of EMI filter. Use Value: Clamps ESD (IEC 61000-4-2 ±15 kV contact) and hot-swap transients to <60 V, protecting USB PD controller and port controller ICs. |
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-E3/52 | Lower PPPM (600 W), same VBR range, SMB package (smaller footprint, higher RθJA) | Not AEC-Q101 qualified; suitable for commercial-grade consumer electronics only | Select when board space is constrained and automotive qualification is unnecessary |
| 1.5KE43A | Through-hole DO-201 package, identical VBR/VC specs, but lower surge repetition capability and no AEC-Q101 rating | Limited to prototyping or legacy through-hole designs; incompatible with automated SMT lines | Choose only for manual assembly or repair scenarios where SMC footprint cannot be accommodated |
Compared with SMBJ43A-E3/52 and 1.5KE43A, the 1.5SMC43AHE3_A/I uniquely combines AEC-Q101 qualification, 1500 W surge rating, and SMC surface-mount compatibility-making it the only option qualified for volume production in automotive power electronics requiring both reliability and automated manufacturability.
Availability
1.5SMC43AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom DC input hardening requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC43AHE3_A/I 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 high-reliability and automotive-grade validation.
The 1.5SMC Series was engineered specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and 1500 W surge capability are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC43AHE3_A/I under maximum surge conditions?
The 1.5SMC43AHE3_A/I clamps to a maximum of 59.3 V when subjected to its rated peak pulse current of 25.3 A using the standardized 10/1000 μs waveform. This value is measured at TA = 25 °C on recommended 8.0 mm × 8.0 mm copper pads and represents the upper bound of voltage seen by protected circuitry during worst-case transient events. The 1.5SMC43AHE3_A/I maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC43AHE3_A/I suitable for bidirectional signal line protection?
No, the 1.5SMC43AHE3_A/I is a unidirectional TVS diode and must not be used on AC-coupled or bidirectional data lines. Its cathode band indicates polarity, and forward conduction occurs above ~0.7 V. For bidirectional protection, Vishay specifies part numbers ending in "CA" (e.g., 1.5SMC43CA); the 1.5SMC43AHE3_A/I is explicitly designed for DC power rail or unidirectional signal protection only.
Does the 1.5SMC43AHE3_A/I meet automotive qualification standards?
Yes, the 1.5SMC43AHE3_A/I is AEC-Q101 qualified, as confirmed by its "HE3" suffix and documentation in Vishay's 88303 datasheet. This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD, validating its suitability for automotive powertrain, body electronics, and ADAS systems where long-term reliability under thermal and mechanical stress is required.
What is the maximum steady-state power dissipation for the 1.5SMC43AHE3_A/I?
The 1.5SMC43AHE3_A/I has a maximum steady-state power dissipation (PD) of 6.5 W at TA = 50 °C with infinite heatsink conditions. In typical PCB layouts using the recommended 8.0 mm × 8.0 mm copper pads per terminal, derating applies above 25 °C ambient-e.g., ~5.2 W at 70 °C ambient. This rating governs continuous leakage-based heating, not transient surge handling.
How does the 1.5SMC43AHE3_A/I compare to standard Zener diodes in surge protection?
Unlike general-purpose Zener diodes, the 1.5SMC43AHE3_A/I is optimized for high-energy transient suppression: it offers 1500 W peak pulse power (vs. typically <10 W for Zeners), faster response time (<1 ns), lower dynamic impedance, and guaranteed clamping performance under IEC/ISO surge waveforms. The 1.5SMC43AHE3_A/I also features glass passivation and AEC-Q101 qualification-attributes absent in standard Zener diodes intended for voltage regulation, not surge protection.
1.5SMC43AHE3_A/I 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:
- 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_A/I FAQ
1.How can I place an order for 1.5SMC43AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43AHE3_A/I 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_A/I reliable?
The price and inventory of 1.5SMC43AHE3_A/I 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_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC43AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43AHE3_A/I?
1.5SMC43AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43AHE3_A/I 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_A/I?
For technical support, including 1.5SMC43AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43AHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC43AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43AHE3_A/I 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_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC43AHE3_A/I?
All 1.5SMC43AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43AHE3_A/I, 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_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC43AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43AHE3_A/I Tags
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