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Vishay General Semiconductor - Diodes Division 1.5SMC43A-M3/57T
- Part No.:
- 1.5SMC43A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43A-M3/57T.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,551
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Product details
Overview
1.5SMC43A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount 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 maximum stand-off voltage (VWM), 59.3 V clamping voltage (VC) at 25.3 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and DC power rail surge suppression.
For engineers reviewing the 1.5SMC43A-M3/57T datasheet, 1.5SMC43A-M3/57T pinout, 1.5SMC43A-M3/57T application, or 1.5SMC43A-M3/57T equivalent, this page delivers verified electrical parameters, SMC (DO-214AB) package details, polarity marking guidance, thermal derating behavior, and AEC-Q101-comparable alternatives for high-reliability design-in.
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 while limiting downstream voltage to ≤59.3 V. Its glass-passivated junction ensures stable breakdown and low leakage (<1 µA at VWM).
Thermally, it uses an SMC (DO-214AB) package with RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = 150 °C. The cathode band identifies polarity, and its M3 suffix confirms halogen-free, RoHS-compliant construction qualified per JESD201 Class 2 whisker test.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1 mA - defines precise voltage threshold where avalanche conduction begins; critical for coordination with downstream IC absolute maximum ratings. |
| VWM | 36.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA; sets safe margin below VBR for normal operation. |
| VC @ IPPM | 59.3 V at 25.3 A - clamped voltage during 10/1000 µs surge; determines worst-case stress on protected circuitry. |
| PPPM | 1500 W - peak pulse power handling capability; enables survival of lightning-induced transients (IEC 61000-4-5 Level 4) on 24 V/48 V systems. |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine); supports protection against inductive switch-off events in relay or solenoid drivers. |
| TJ max. | +150 °C - maximum junction temperature; allows operation in under-hood automotive or enclosed industrial enclosures without forced cooling. |
| Package | SMC (DO-214AB) - standardized surface-mount outline (7.75 × 6.22 × 2.62 mm) compatible with automated pick-and-place and reflow profiles up to 260 °C peak. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; cathode identified by a single black band on the body; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to protected line's low-side or ground reference; must be routed with low-inductance trace to minimize clamping overshoot. |
| Cathode | Avalanche conduction node / high-voltage terminal | Marked with black band; connects to the line being protected (e.g., 24 V rail or CAN_H); determines directionality and clamping polarity. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity requirements for industrial and automotive electronics without external series impedance. |
| Low incremental surge resistance | Minimizes VC – VBR differential, reducing clamping overshoot and improving protection margin for 3.3 V/5 V logic interfaces. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow assembly without preconditioning or special handling; eliminates moisture-related popcorning risk. |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills environmental compliance mandates for EU, China RoHS, and automotive OEM Tier-1 supply chains without compromising thermal or electrical performance. |
| Fast response time (<1 ps) | Activates before most semiconductor damage mechanisms initiate, protecting sensitive gate oxides in MOSFETs and input stages of op-amps or microcontrollers. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in engine control modules. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between signal line and chassis ground, activated within picoseconds of overvoltage onset. Use Value: Limits induced transients to ≤59.3 V, preserving ADC input integrity and preventing latch-up in signal conditioning amplifiers. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers against field-wiring surges and relay contact bounce. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to common ground, absorbing repetitive switching transients on DIN-rail mounted I/O modules. Use Value: Withstands ≥1000 surges at rated PPPM, ensuring long-term reliability in factory automation environments with high EMI exposure. |
| DC Power Rail Protection | Telecom Interface Protection |
Use Scenario: Secondary overvoltage protection on 48 V telecom power distribution boards upstream of DC-DC converters and PMICs. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 36.8 V) placed across input capacitor to clamp surges exceeding converter OVP threshold. Use Value: Clamps 1500 W transients to 59.3 V, preventing catastrophic failure of buck controller ICs rated for 60 V absolute maximum input. |
Use Scenario: Protecting RS-485 transceiver bus lines (A/B) from ESD and lightning-induced surges in outdoor base station backhaul links. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per line) referenced to local ground, coordinated with common-mode chokes. Use Value: Low capacitance (<100 pF typical) avoids signal integrity degradation at 10 Mbps data rates while meeting IEC 61000-4-2 Level 4 (15 kV air). |
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 VBR/VC specs but SMB package (smaller footprint, lower PPPM = 600 W); RθJA = 85 °C/W vs. 75 °C/W. | Limited to lower-energy transients (e.g., ESD-only); unsuitable for IEC 61000-4-5 Level 3+ or load dump. | Select when board space is constrained and surge threat level is limited to ±8 kV contact ESD (IEC 61000-4-2). |
| 1.5KE43A-T | Through-hole DO-201 package; identical electrical specs but higher mounting thermal resistance and no MSL Level 1 rating. | Requires wave soldering; incompatible with fully SMT production; not suitable for automotive AEC-Q101 programs. | Choose only for legacy through-hole designs or prototyping where reflow compatibility and automotive qualification are not required. |
Compared with SMBJ43A-E3/52 and 1.5KE43A-T, the 1.5SMC43A-M3/57T uniquely combines 1500 W surge capability, SMC's optimized thermal performance, halogen-free compliance, and MSL Level 1 suitability - making it the preferred choice for high-volume, automotive-grade, and industrial SMT applications demanding full IEC 61000-4-5 immunity.
Availability
1.5SMC43A-M3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and 24–48 V DC power rail surge suppression requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC43A-M3/57T 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, TVS, MOSFETs, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where compact size, high surge robustness, and AEC-Q101 qualification are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5SMC43A-M3/57T?
The 1.5SMC43A-M3/57T has a specified breakdown voltage range of 40.9 V to 45.2 V at 1 mA test current, representing a ±5% tolerance around the nominal 43 V rating. This tight VBR window ensures predictable clamping onset and simplifies coordination with system-level overvoltage protection thresholds in designs using the 1.5SMC43A-M3/57T.
Is 1.5SMC43A-M3/57T AEC-Q101 qualified?
No - the 1.5SMC43A-M3/57T carries the M3 suffix (halogen-free, RoHS-compliant commercial grade) but is not AEC-Q101 qualified. For automotive-qualified equivalents, refer to part numbers with HE3 or HM3 suffixes (e.g., 1.5SMC43AHE3_A/H), which undergo full AEC-Q101 stress testing and are marked accordingly in Vishay's ordering matrix.
What is the maximum clamping voltage of 1.5SMC43A-M3/57T under surge conditions?
The 1.5SMC43A-M3/57T exhibits a maximum clamping voltage (VC) 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 guaranteed per Vishay's datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Can 1.5SMC43A-M3/57T be used in bidirectional configurations?
No - the 1.5SMC43A-M3/57T is strictly unidirectional, indicated by the "A" suffix and cathode band marking. For bidirectional operation, select the CA-suffixed variant (e.g., 1.5SMC43CA-M3/57T), which provides symmetrical clamping in both polarities and omits the polarity band.
What is the thermal resistance junction-to-ambient for 1.5SMC43A-M3/57T?
The 1.5SMC43A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended copper pad layout (0.31" × 0.31" per terminal). This value assumes standard FR-4 PCB construction and is critical for calculating safe power dissipation limits at elevated ambient temperatures.
1.5SMC43A-M3/57T 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC43A-M3/57T FAQ
1.How can I place an order for 1.5SMC43A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43A-M3/57T 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 1.5SMC43A-M3/57T reliable?
The price and inventory of 1.5SMC43A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC43A-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC43A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43A-M3/57T?
1.5SMC43A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43A-M3/57T 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 1.5SMC43A-M3/57T?
For technical support, including 1.5SMC43A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43A-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC43A-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43A-M3/57T 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 1.5SMC43A-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC43A-M3/57T?
All 1.5SMC43A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43A-M3/57T, 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 1.5SMC43A-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC43A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43A-M3/57T Tags
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