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Vishay General Semiconductor - Diodes Division 1.5SMC56A-E3/57T
- Part No.:
- 1.5SMC56A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56A-E3/57T.pdf
- Description:
- TVS DIODE 47.8VWM 77VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:914
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Product details
Overview
1.5SMC56A-E3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 56 V breakdown voltage (VBR = 53.2–58.8 V at 1 mA), 47.8 V stand-off voltage (VWM), 77.0 V maximum clamping voltage (VC) at 19.5 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 1.5SMC56A-E3/57T datasheet, 1.5SMC56A-E3/57T pinout, 1.5SMC56A-E3/57T application, or 1.5SMC56A-E3/57T equivalent, this device delivers verified clamping performance, AEC-Q101 qualification readiness (via HE3 suffix variants), RoHS-compliant SMC (DO-214AB) packaging, and low incremental surge resistance critical for fast transient immunity in 12 V/24 V systems.
Technical Context
The 1.5SMC56A-E3/57T operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve sub-nanosecond response to transients. Its clamping behavior is defined by a tightly controlled VBR range (53.2–58.8 V) and low dynamic impedance, enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes up to 1500 W.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable operation up to TJ = 150 °C. The cathode-band polarity marking and matte tin-plated leads comply with J-STD-002 solderability standards, ensuring compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at 1 mA - defines precise avalanche initiation threshold for repeatable clamping onset |
| VWM | 47.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VC @ IPPM | 77.0 V at 19.5 A - clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPPM | 1500 W - peak transient power handling capability under standardized surge waveform |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), supporting high-energy fault events |
| TJ max. | +150 °C - maximum junction temperature enabling use in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - surface-mount outline with 0.320" body length, optimized for automated placement and thermal pad layout |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads; cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 12 V rail or signal input); band-marked end accepts reverse surge current |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges on 12 V systems |
| Low clamping ratio (VC/VBR ≈ 1.34) | Minimizes overvoltage overshoot during transient events, reducing stress on downstream ICs like CAN transceivers |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without moisture-related popcorning, eliminating pre-bake requirements |
| AEC-Q101 qualification option | HE3/HM3 variants available for automotive-grade reliability validation in engine control and ADAS modules |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term leakage stability across temperature and lifetime |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in 12 V vehicle subsystems from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and chassis ground to clamp transients before reaching ADC input or signal conditioner. Use Value: Clamps 77.0 V at 19.5 A, keeping protected node below 80 V during 100 V/50 ms load dump, preserving sensor accuracy and interface IC integrity. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to field-wiring inductive kickback. IC Role / Device Role / Timing Role: Standoff-rated TVS on each input channel, referenced to common ground, absorbing repetitive 1500 W surges from solenoid de-energization. Use Value: Withstands 0.01% duty cycle repetitive surges while maintaining <1 µA leakage at 47.8 V, preventing false triggering and ensuring long-term channel stability. |
| DC Power Rail Surge Suppression | RS-485 Transceiver Protection |
Use Scenario: Secondary overvoltage protection on 48 V telecom power distribution boards upstream of DC-DC converters. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-ground, cathode-to-rail, acting as last-line clamping element after primary MOV or fuse coordination. Use Value: Limits rail voltage to ≤77.0 V during 10/1000 µs transients, preventing converter latch-up and enabling system-level compliance with ITU-T K.20. |
Use Scenario: Protecting RS-485 transceiver bus pins (A/B) against ESD and lightning-induced common-mode surges in building automation networks. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per line) referenced to local ground, providing differential and common-mode clamping. Use Value: Achieves <1 ns response time and 77.0 V clamping, maintaining signal integrity while meeting IEC 61000-4-2 ±15 kV contact discharge immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58A | Lower PPPM (600 W), same VWM (47.8 V), SMB package (smaller footprint, higher RθJA) | Preferred where board space is constrained and surge energy is limited to ≤600 W (e.g., consumer USB ports) | Select SMBJ58A only when 1500 W rating is not required and thermal margin allows higher junction temperature rise. |
| 1.5KE56A | Through-hole DO-201 package, identical electrical specs (VBR, VC, PPPM), higher mounting thermal resistance | Suitable for legacy through-hole designs or prototyping where SMT rework is impractical | Choose 1.5KE56A for manual assembly or repair scenarios; avoid in high-density SMT production due to footprint and thermal limitations. |
Compared with SMBJ58A and 1.5KE56A, the 1.5SMC56A-E3/57T uniquely balances 1500 W surge capacity, SMC's optimized thermal pad layout, and RoHS-compliant commercial-grade construction - making it the preferred choice for volume SMT deployment in automotive and industrial power rails where both energy handling and manufacturability matter.
Availability
1.5SMC56A-E3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and 48 V DC power rail surge suppression requiring stable component supply, full traceability, and consistent lot-to-lot performance.
Supply support for 1.5SMC56A-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, fast response, and AEC-Q101 readiness are essential design requirements.
FAQ
What is the clamping voltage of the 1.5SMC56A-E3/57T under a 10/1000 µs surge?
The 1.5SMC56A-E3/57T has a maximum clamping voltage (VC) of 77.0 V at 19.5 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88303 and reflects worst-case clamping performance across temperature and process variation - critical for validating voltage margins in protected circuits.
Is the 1.5SMC56A-E3/57T RoHS-compliant and halogen-free?
Yes, the 1.5SMC56A-E3/57T carries the "E3" suffix, indicating RoHS-compliance per EU Directive 2011/65/EU and exemption 7a. It is not halogen-free; for halogen-free compliance, the "M3" suffix variant (e.g., 1.5SMC56A-M3/57T) must be selected - both meet JESD201 Class 2 whisker resistance requirements.
Does the 1.5SMC56A-E3/57T have AEC-Q101 qualification?
The base 1.5SMC56A-E3/57T is commercial-grade and not AEC-Q101 qualified. However, Vishay offers AEC-Q101-qualified versions under the HE3 suffix (e.g., 1.5SMC56AHE3_A), which share identical electrical specs but undergo additional automotive reliability testing including temperature cycling, HTRB, and ESD.
What is the thermal resistance from junction to ambient for the 1.5SMC56A-E3/57T?
The typical junction-to-ambient thermal resistance (RθJA) of the 1.5SMC56A-E3/57T is 75 °C/W when mounted on the minimum recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes still air conditions and is used to calculate steady-state temperature rise under continuous power dissipation (PD = 6.5 W).
How is polarity identified on the 1.5SMC56A-E3/57T?
The 1.5SMC56A-E3/57T is unidirectional and marked with a cathode band on the SMC (DO-214AB) package body. The banded end is the cathode and must be connected to the line being protected; the unmarked end is the anode and connects to ground or the return path - correct orientation is essential for proper clamping function.
1.5SMC56A-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):
- 47.8V
- Voltage - Breakdown (Min):
- 53.2V
- Voltage - Clamping (Max) @ Ipp:
- 77V
- Current - Peak Pulse (10/1000µs):
- 19.5A
- 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)
1.5SMC56A-E3/57T FAQ
1.How can I place an order for 1.5SMC56A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56A-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 1.5SMC56A-E3/57T reliable?
The price and inventory of 1.5SMC56A-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 1.5SMC56A-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC56A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56A-E3/57T?
1.5SMC56A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56A-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 1.5SMC56A-E3/57T?
For technical support, including 1.5SMC56A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56A-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC56A-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56A-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 1.5SMC56A-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC56A-E3/57T?
All 1.5SMC56A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56A-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 1.5SMC56A-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC56A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56A-E3/57T Tags
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