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Vishay General Semiconductor - Diodes Division 1.5SMC43A-E3/57T
- Part No.:
- 1.5SMC43A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43A-E3/57T.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,300
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Product details
Overview
1.5SMC43A-E3/57T 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 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 widely deployed in automotive power supply rails, industrial sensor interfaces, and DC-DC converter input stages.
For engineers reviewing the 1.5SMC43A-E3/57T datasheet, 1.5SMC43A-E3/57T pinout, 1.5SMC43A-E3/57T application, or 1.5SMC43A-E3/57T equivalent, key selection criteria include unidirectional polarity, SMC (DO-214AB) package compatibility, 150 °C max junction temperature, low incremental surge resistance, and AEC-Q101 qualification eligibility via HE3/HM3 variants.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below VWM (36.8 V) and rapidly avalanches above VBR (min 40.9 V) to limit transient voltages. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM).
It handles repetitive 10/1000 μs surges up to 1500 W with 0.01% duty cycle, derates linearly above 25 °C ambient (RθJA = 75 °C/W), and sustains 200 A non-repetitive forward surge (8.3 ms half-sine). Polarity is marked by a cathode band on the SMC package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 40.9 V / 45.2 V at 1.0 mA - defines precise avalanche onset range for reliable clamping threshold |
| VWM | 36.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | ≤59.3 V at 25.3 A - clamped voltage during 1500 W transient, limiting stress on downstream ICs |
| PPPM | 1500 W - peak pulse power handling per 10/1000 μs waveform, enabling lightning and ESD surge immunity |
| IFSM | 200 A - single half-sine surge rating (8.3 ms), supports high-energy inductive switch-off events |
| TJ max | +150 °C - enables operation in under-hood automotive and industrial environments without thermal derating |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement for thermal performance |
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).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal (reverse-biased operation) | Connected to protected line; conducts during transient when cathode is at higher potential |
| Cathode | Current exit terminal (marked with band) | Typically tied to ground or lower-potential rail; establishes unidirectional clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables compliance with IEC 61000-4-5 Level 4 (4 kV surge) in properly laid-out PCBs |
| Glass passivated junction | Ensures stable VBR tolerance and low long-term parameter drift under thermal cycling |
| Low incremental surge resistance | Minimizes VC overshoot during fast transients, improving protection margin for 3.3 V/5 V logic |
| RoHS-compliant, halogen-free option (E3/M3) | Meets IPC-1752A material declaration requirements for automotive and industrial OEMs |
| AEC-Q101 qualification path | HE3/HM3 variants support automotive powertrain and body electronics with full stress test documentation |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V battery line in engine control unit exposed to load dump (ISO 16750-2) and jump-start spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input to clamp transients before regulation. Use Value: Clamps to ≤59.3 V at 25.3 A, protecting 40 V-rated input capacitors and controller ICs from >100 V surges. |
Use Scenario: 24 V analog sensor output (e.g., pressure transducer) routed across noisy factory floor. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt ESD (IEC 61000-4-2) and inductive coupling noise. Use Value: Sub-1 ns response time and 36.8 V VWM prevent false triggering while maintaining signal integrity up to 24 V nominal. |
| Telecom DC Power Input Protection | Consumer USB-C Power Delivery Line |
Use Scenario: -48 V telecom rectifier output feeding backplane distribution with lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS on negative rail to suppress common-mode transients entering via AC-coupled inputs. Use Value: 1500 W rating and 150 °C TJ max allow sustained operation in sealed, convection-limited enclosures. |
Use Scenario: VBUS line in USB-C receptacle subjected to hot-plug ESD and cable discharge events. IC Role / Device Role / Timing Role: Primary clamping device upstream of USB PD controller and port protection IC. Use Value: Low leakage (<1.0 μA) avoids standby current penalty; SMC package fits tight board space near connector. |
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 peak power (600 W), SMB (DO-214AA) package, same VBR/VWM range | Not suitable for IEC 61000-4-5 Level 4; limited to consumer-grade surge immunity | Select when board space is constrained and surge threat level is ≤1 kV (IEC 61000-4-5 Level 2) |
| 1.5KE43A | Through-hole TO-204AA (DO-201AE) package, identical electrical specs, higher RθJA (100 °C/W) | Requires wave soldering; unsuitable for fully SMT production or high-density layouts | Choose only for legacy through-hole designs or prototyping where rework accessibility is prioritized |
Compared with SMBJ43A-E3/52 and 1.5KE43A, the 1.5SMC43A-E3/57T uniquely balances 1500 W surge capability, SMC surface-mount compatibility, and commercial-grade RoHS compliance-making it optimal for volume automotive and industrial SMT production where both performance and manufacturability are critical.
Availability
1.5SMC43A-E3/57T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply, consistent lot-to-lot parametric performance, and traceable RoHS compliance.
Supply support for 1.5SMC43A-E3/57T 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and AEC-Q qualification.
The 1.5SMC Series was engineered specifically for high-power, surface-mount transient suppression in automotive, industrial, and telecom infrastructure-prioritizing ruggedness, repeatable clamping, and automated assembly compatibility.
FAQ
What is the clamping voltage of the 1.5SMC43A-E3/57T under a 10/1000 μs surge?
The 1.5SMC43A-E3/57T clamps to a maximum of 59.3 V when subjected to its rated peak pulse current of 25.3 A (10/1000 μs waveform). This value is measured per standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads) and represents the upper bound of voltage seen by downstream circuitry during surge events. The 1.5SMC43A-E3/57T achieves this clamping with low incremental resistance, minimizing overshoot beyond the specified VC.
Is the 1.5SMC43A-E3/57T suitable for automotive applications?
The 1.5SMC43A-E3/57T itself is RoHS-compliant commercial grade (E3 suffix), but Vishay offers AEC-Q101 qualified variants under HE3/HM3 ordering codes (e.g., 1.5SMC43AHE3_A). These qualified versions undergo stress testing per AEC-Q101 and are approved for automotive powertrain, body, and chassis systems. For production automotive use, specify the HE3 variant-not the E3/57T-to ensure compliance.
What does the "/57T" suffix indicate in 1.5SMC43A-E3/57T?
The "/57T" suffix denotes packaging: 7-inch diameter plastic tape-and-reel with 850 units per reel. This format is optimized for high-speed pick-and-place assembly. The "57T" code is distinct from "/9AT" (13-inch reel, 3500 units) and confirms the part is supplied in industry-standard SMT carrier tape meeting EIA-481-D specifications. The 1.5SMC43A-E3/57T is fully compatible with automated manufacturing lines using standard 8 mm tape feeders.
How does the 1.5SMC43A-E3/57T differ from bidirectional TVS diodes like 1.5SMC43CA?
The 1.5SMC43A-E3/57T is unidirectional and features a cathode band for polarity-sensitive placement; it blocks voltage in one direction and clamps in reverse. In contrast, 1.5SMC43CA is bidirectional-symmetrical in both directions, with no polarity marking-and used where AC signals or differential lines require protection without regard to voltage polarity. The 1.5SMC43A-E3/57T is selected for DC power rails; the CA version suits data lines like RS-485 or CAN.
What is the maximum operating temperature for the 1.5SMC43A-E3/57T?
The 1.5SMC43A-E3/57T has a maximum junction temperature (TJ) of +150 °C and an operating/storage range of -65 °C to +150 °C. Its thermal resistance junction-to-ambient (RθJA) is 75 °C/W under standard mounting (0.31" × 0.31" copper pads), meaning power dissipation must be derated above 25 °C ambient per Figure 2 in the datasheet. At 100 °C ambient, the 1.5SMC43A-E3/57T supports ~2.2 W continuous dissipation before reaching TJ max.
1.5SMC43A-E3/57T 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-E3/57T FAQ
1.How can I place an order for 1.5SMC43A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43A-E3/57T 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-E3/57T reliable?
The price and inventory of 1.5SMC43A-E3/57T 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-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC43A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43A-E3/57T?
1.5SMC43A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43A-E3/57T 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-E3/57T?
For technical support, including 1.5SMC43A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43A-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC43A-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43A-E3/57T 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-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC43A-E3/57T?
All 1.5SMC43A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43A-E3/57T, 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-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC43A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43A-E3/57T Tags
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