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Vishay General Semiconductor - Diodes Division 1.5SMC43AHE3_A/H
- Part No.:
- 1.5SMC43AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43AHE3_A/H.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,580
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Product details
Overview
1.5SMC43AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power (10/1000 μs), 40.9 V minimum breakdown voltage (VBR), 36.8 V standoff voltage (VWM), and 59.3 V clamping voltage (VC) at 25.3 A peak pulse current - deployed to safeguard automotive sensor signal lines against lightning-induced transients and inductive switching spikes.
For engineers reviewing the 1.5SMC43AHE3_A/H datasheet, 1.5SMC43AHE3_A/H pinout, 1.5SMC43AHE3_A/H application, or 1.5SMC43AHE3_A/H equivalent, this AEC-Q101 qualified device offers verified clamping performance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for automotive-grade ESD and surge resilience in production ECUs and ADAS sensor interfaces.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse-biased voltage exceeds VBR (40.9–45.2 V), it avalanches into low-impedance conduction, limiting transient voltage to ≤59.3 V at 25.3 A. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns), while the SMC package supports automated placement and meets UL 94 V-0 flammability.
Thermal design is constrained by RθJA = 75 °C/W and RθJL = 15 °C/W, with maximum junction temperature of +150 °C. It sustains 200 A non-repetitive forward surge (8.3 ms half-sine) and exhibits <1.0 μA leakage at VWM, enabling reliable operation in low-power sensor front-ends without loading bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 36.8 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for normal circuit bias. |
| VBR (Breakdown) | 40.9 V min / 45.2 V max at 1.0 mA - Confirmed avalanche onset range; defines minimum clamping threshold under transient stress. |
| VC (Clamping) | 59.3 V at 25.3 A (10/1000 μs) - Peak voltage seen by protected IC during worst-case surge; determines downstream component voltage rating margin. |
| PPPM | 1500 W - Energy-handling capacity for standardized 10/1000 μs surge; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| IPPM | 25.3 A - Peak surge current capability at rated clamping voltage; validates protection for >20 A line transients in automotive CAN/FlexRay interfaces. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood deployment with standard PCB copper pad thermal relief (8.0 mm × 8.0 mm). |
| AEC-Q101 | Qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD; required for ASIL-B sensor subsystems. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to system ground or lower-potential rail; establishes reference for clamping action during positive transients on cathode side. |
| Cathode | Transient voltage input / Clamping node | Connected to protected line (e.g., sensor output); conducts surge current to ground when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Supports IEC 61000-4-5 Level 4 (4 kV) surge immunity without derating in standard PCB layout. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns response), improving protection margin for 3.3 V/5 V logic. |
| AEC-Q101 qualification (HE3 suffix) | Validates long-term reliability under automotive thermal cycling (-40 °C to +125 °C), humidity, and vibration stress. |
| MSL Level 1 (260 °C peak reflow) | Enables single-pass lead-free reflow assembly without pre-baking; reduces manufacturing complexity and cost. |
| Glass passivated junction | Ensures stable VBR tolerance (±5 %) and low leakage (<1 μA) over lifetime, critical for battery-powered sensor nodes. |
Applications
| Automotive Sensor Protection | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting LIN/CAN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine control modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between signal line and chassis ground to clamp transients before they reach the transceiver's ESD diodes. Use Value: Limits clamped voltage to 59.3 V, ensuring downstream 70 V-rated transceivers remain within safe operating area during 100 V/50 ms load dump events. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges and EMI coupling. IC Role / Device Role / Timing Role: Standoff-connected TVS across input terminals to absorb induced common-mode transients without disrupting loop calibration. Use Value: With 36.8 V VWM, it remains fully blocking during normal 24 V DC operation while clamping >40 V surges to protect precision op-amps and ADC front-ends. |
| Consumer Power Adapter Interface | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side transient suppression on USB-C PD power delivery lines and auxiliary 5 V rails in smart home hubs. IC Role / Device Role / Timing Role: Fast-response TVS placed adjacent to USB port connector to divert ESD and capacitive coupling spikes before reaching USB controller IC. Use Value: Sub-1 ns response and 59.3 V clamping prevent latch-up in 5 V tolerant USB PHYs, meeting IEC 61000-4-2 ±8 kV contact discharge requirements. |
Use Scenario: Primary protection stage on Ethernet PHY interface lines (e.g., RJ45 magnetics secondary) in VoIP gateways and base stations. IC Role / Device Role / Timing Role: Unidirectional TVS connected from data line to local ground to suppress lightning-induced surges coupled via transformer windings. Use Value: 1500 W rating handles telecom-grade 10/700 μs surges up to 1.5 kV; low capacitance (<100 pF) avoids signal integrity degradation at 100 Mbps. |
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 | Same VWM/VBR/VC specs but SMB (DO-214AA) package; 600 W PPPM, smaller footprint, higher RθJA (100 °C/W). | Limited to lower-energy surges (IEC 61000-4-5 Level 2); unsuitable for under-hood automotive where 1500 W is mandated. | Select only for space-constrained consumer applications with <600 W surge exposure and no AEC-Q101 requirement. |
| 1.5KE43A | Through-hole TO-204AE (DO-41); identical electrical specs but 1500 W rating, higher mounting thermal resistance, no AEC-Q101 qualification. | Requires wave soldering; incompatible with automated SMT lines; not validated for automotive thermal cycling or vibration. | Use only for legacy industrial repairs or prototyping where SMT is unavailable and automotive qualification is unnecessary. |
Compared with SMBJ43A-E3/52 and 1.5KE43A, the 1.5SMC43AHE3_A/H uniquely combines AEC-Q101 qualification, 1500 W SMT capability, and DO-214AB thermal performance - making it the sole choice for production automotive electronics requiring zero-layout-change migration from through-hole or non-qualified alternatives.
Availability
1.5SMC43AHE3_A/H is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and telecom line card development requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC43AHE3_A/H 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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, precision, and application-specific performance.
The 1.5SMC Series was developed specifically for high-power, surface-mount transient suppression in automotive, industrial, and telecom systems - prioritizing AEC-Q101 compliance, low clamping voltage, and automated assembly compatibility.
FAQ
What is the clamping voltage of the 1.5SMC43AHE3_A/H at its rated peak pulse current?
The 1.5SMC43AHE3_A/H has a maximum clamping voltage (VC) of 59.3 V at 25.3 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay Document 88303 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is the 1.5SMC43AHE3_A/H qualified for automotive use?
Yes, the 1.5SMC43AHE3_A/H is AEC-Q101 qualified, as confirmed by the "HE3" suffix and documentation in Vishay's 1.5SMC Series datasheet (Rev. 09-Mar-2026). This qualification covers temperature cycling, high-temperature reverse bias, and ESD testing - validating its suitability for ASIL-B automotive subsystems such as body control modules and ADAS sensor interfaces.
What package type does the 1.5SMC43AHE3_A/H use, and what are its key mechanical features?
The 1.5SMC43AHE3_A/H uses the SMC (DO-214AB) surface-mount package: dimensions 7.11 mm × 6.22 mm × 2.62 mm, with matte tin-plated leads compliant with J-STD-002, MSL Level 1 (260 °C peak reflow), and UL 94 V-0 flammability rating. The cathode is marked by a visible band, and the package supports automated pick-and-place assembly.
How does the 1.5SMC43AHE3_A/H differ from bidirectional TVS diodes like 1.5SMC43CA?
The 1.5SMC43AHE3_A/H is unidirectional and intended for DC-biased lines where polarity is fixed (e.g., power rails, sensor outputs), offering lower leakage (<1.0 μA at VWM) and tighter VBR tolerance. In contrast, 1.5SMC43CA is bidirectional, suited for AC or floating lines (e.g., data buses), but exhibits higher leakage and symmetric clamping in both directions - making them non-interchangeable without circuit review.
What is the maximum junction temperature and thermal resistance specification for the 1.5SMC43AHE3_A/H?
The 1.5SMC43AHE3_A/H has a maximum junction temperature (TJ) of +150 °C and typical thermal resistances of RθJA = 75 °C/W (junction-to-ambient, on standard 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W (junction-to-leads). These values enable thermal design validation for under-hood automotive environments and high-density industrial PCB layouts.
1.5SMC43AHE3_A/H 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/H FAQ
1.How can I place an order for 1.5SMC43AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43AHE3_A/H 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/H reliable?
The price and inventory of 1.5SMC43AHE3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC43AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43AHE3_A/H?
1.5SMC43AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43AHE3_A/H 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/H?
For technical support, including 1.5SMC43AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43AHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC43AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43AHE3_A/H 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/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC43AHE3_A/H?
All 1.5SMC43AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43AHE3_A/H, 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/H part is unused and in its original packaging.
Return procedure for 1.5SMC43AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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