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Vishay General Semiconductor - Diodes Division 1.5SMC43AHM3_A/H
- Part No.:
- 1.5SMC43AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43AHM3_A/H.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,480
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Product details
Overview
1.5SMC43AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power rails and signal lines. It features a 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 (IPPM), and delivers 1500 W peak pulse power with a 10/1000 μs waveform - ideal for automotive power supply input protection against load dump and ISO 7637-2 transients.
For engineers reviewing the 1.5SMC43AHM3_A/H datasheet, 1.5SMC43AHM3_A/H pinout, 1.5SMC43AHM3_A/H application, or 1.5SMC43AHM3_A/H equivalent, this part offers AEC-Q101 qualification, halogen-free RoHS compliance (HM3 suffix), low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive and industrial PCB designs requiring validated transient immunity without layout rework.
Technical Context
The 1.5SMC43AHM3_A/H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1.0 ns), enabling effective suppression of ESD (IEC 61000-4-2) and lightning-induced surges (IEC 61000-4-5).
Thermally, it uses an SMC (DO-214AB) package with RθJA = 75 °C/W and RθJL = 15 °C/W, supporting 6.5 W steady-state dissipation at TA = 50 °C. The cathode band marking defines polarity, and its 200 A IFSM rating allows survival of 8.3 ms half-sine surge events common in automotive alternator load-dump scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at IT = 1.0 mA - defines precise clamping onset window for predictable overvoltage thresholding |
| VWM | 36.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA, ensuring no false triggering during normal operation |
| VC @ IPPM | ≤59.3 V at 25.3 A - actual clamped voltage under 1500 W 10/1000 μs surge, directly limiting downstream IC stress |
| IPPM | 25.3 A - peak surge current capability with 0.01% duty cycle, sufficient for ISO 7637-2 Pulse 5a/b load-dump events |
| PPPM | 1500 W - standardized peak pulse power rating confirming robustness against repetitive transient energy bursts |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement for reliable power dissipation |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C peak reflow), dimensions 7.75 mm × 6.22 mm × 2.62 mm (L × W × H). Cathode identified by a single black band on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to system ground or lower-potential rail; establishes reference for unidirectional clamping action |
| Cathode | Clamping output / Surge current sink | Connected to protected line (e.g., 12 V battery rail); conducts surge current to ground when VREV > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JESD22 standards |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive environmental requirements and enables compliance with ELV and REACH directives without material substitution risk |
| 1500 W peak pulse power (10/1000 μs) | Supports sustained transient immunity across multiple ISO 7637-2 test pulses without degradation |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during clamping, reducing stress on downstream MOSFETs and PMICs |
| Fast response time & low dynamic impedance | Sub-nanosecond turn-on and <1 Ω incremental surge resistance ensure effective suppression before sensitive circuitry is damaged |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients (ISO 7637-2 Pulse 5a/b) and alternator switching spikes. IC Role / Device Role: Unidirectional TVS placed between battery rail and input filter capacitor, sinking surge current to chassis ground. Use Value: Clamps 12 V rail to ≤59.3 V during 1500 W surges, preventing damage to 40 V-rated DC-DC converters and microcontrollers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to long harnesses susceptible to inductive switching noise. IC Role / Device Role: TVS mounted at connector interface to shunt induced transients before entering signal conditioning circuitry. Use Value: Limits transient voltage to <60 V while maintaining <1 μA leakage at 36.8 V, preserving sensor accuracy and ADC integrity. |
| Telecom DC Power Input | Consumer Power Adapter Output |
Use Scenario: Secondary-side overvoltage protection on 48 V telecom rectifier outputs exposed to lightning-induced surges (IEC 61000-4-5). IC Role / Device Role: Unidirectional clamp referenced to system ground, placed after bulk capacitor to protect downstream PoE controllers. Use Value: Withstands 25.3 A peak current and maintains clamping below 60 V, meeting GR-1089-CORE surge immunity requirements. |
Use Scenario: Output rail protection in USB PD and QC adapters where 20 V output lines require fail-safe overvoltage shutdown margin. IC Role / Device Role: Standoff-rated TVS absorbing transient energy from hot-plug events or feedback loop faults. Use Value: 36.8 V VWM provides 3.2 V headroom above 33.6 V max adapter output, avoiding false triggering while enabling fast clamping. |
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 VBR range (40.9–45.2 V), but SMB package (smaller footprint, lower PPPM = 600 W) | Limited to lower-energy transients; unsuitable for automotive load-dump or telecom lightning tests | Select only for space-constrained consumer applications with <600 W surge requirements |
| 1.5KE43A | Through-hole DO-201 package, identical electrical specs, but no AEC-Q101 or halogen-free certification | Not qualified for automotive production; requires manual assembly and lacks MSL-1 reflow compatibility | Use only for prototyping or non-automotive industrial repairs where surface-mount is not required |
Compared with SMBJ43A-E3/52T and 1.5KE43A, the 1.5SMC43AHM3_A/H uniquely combines AEC-Q101 qualification, 1500 W surge capacity, halogen-free compliance, and SMC surface-mount packaging - making it the only drop-in solution for volume automotive PCBs needing validated, high-power, automated-assembly-ready TVS protection.
Availability
1.5SMC43AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor nodes, and telecom power supplies requiring stable component supply with full traceability and lifecycle continuity.
Supply support for 1.5SMC43AHM3_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 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 pulse power density, and consistent clamping performance across temperature and lifetime.
FAQ
What is the exact breakdown voltage range for 1.5SMC43AHM3_A/H?
The 1.5SMC43AHM3_A/H has a guaranteed breakdown voltage (VBR) range of 40.9 V to 45.2 V at a test current of 1.0 mA, measured per ANSI/IEEE C62.35. This ±5% tolerance ensures predictable clamping onset in automotive and industrial power rail protection circuits where precise overvoltage thresholds are critical for system safety.
Is 1.5SMC43AHM3_A/H qualified for automotive use?
Yes, the 1.5SMC43AHM3_A/H carries AEC-Q101 qualification, confirmed by Vishay's documentation for HM3-suffix parts in the 1.5SMC series up to 220 V. It meets stress test requirements including temperature cycling, high-temperature operating life, and mechanical shock - making it suitable for under-hood and body-control module applications.
What does the "HM3" suffix indicate in 1.5SMC43AHM3_A/H?
The "HM3" suffix in 1.5SMC43AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It replaces legacy lead-based or brominated flame retardants while maintaining UL 94 V-0 flammability rating and JESD201 Class 2 whisker resistance - essential for modern automotive and green-electronics compliance.
What is the maximum clamping voltage of 1.5SMC43AHM3_A/H under surge conditions?
The 1.5SMC43AHM3_A/H clamps to a maximum of 59.3 V when subjected to its rated 25.3 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Does 1.5SMC43AHM3_A/H have polarity markings, and how is it oriented on PCB?
Yes, the 1.5SMC43AHM3_A/H features a single black cathode band on the SMC (DO-214AB) package body. During PCB layout, the banded end must connect to the line being protected (e.g., 12 V rail), while the unmarked (anode) end connects to system ground - ensuring correct unidirectional clamping behavior.
1.5SMC43AHM3_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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC43AHM3_A/H FAQ
1.How can I place an order for 1.5SMC43AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43AHM3_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 1.5SMC43AHM3_A/H reliable?
The price and inventory of 1.5SMC43AHM3_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 1.5SMC43AHM3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC43AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43AHM3_A/H?
1.5SMC43AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43AHM3_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 1.5SMC43AHM3_A/H?
For technical support, including 1.5SMC43AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43AHM3_A/H requirements.
6.How does Aetrix verify that 1.5SMC43AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43AHM3_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 1.5SMC43AHM3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC43AHM3_A/H?
All 1.5SMC43AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43AHM3_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 1.5SMC43AHM3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC43AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43AHM3_A/H Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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