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Vishay General Semiconductor - Diodes Division 1.5SMC56A-M3/57T
- Part No.:
- 1.5SMC56A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56A-M3/57T.pdf
- Description:
- TVS DIODE 47.8VWM 77VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,978
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Product details
Overview
1.5SMC56A-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 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 capability with a 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-M3/57T datasheet, 1.5SMC56A-M3/57T pinout, 1.5SMC56A-M3/57T application, or 1.5SMC56A-M3/57T equivalent, this page delivers verified electrical parameters, SMC (DO-214AB) package details, polarity marking guidance, thermal derating curves, and AEC-Q101-comparable alternatives for high-reliability design-in.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM (47.8 V), it transitions rapidly from high-impedance to low-impedance state, diverting transient energy to ground while limiting downstream voltage to ≤77.0 V. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at VWM).
Thermal performance is defined by RθJA = 75 °C/W (on recommended 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 and supports automated SMT placement with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 53.2 V / 58.8 V at 1 mA - defines precise voltage threshold where avalanche conduction begins; critical for matching system overvoltage trip margin. |
| VWM | 47.8 V - maximum continuous reverse operating voltage before leakage rises; sets safe DC bias limit for protected line. |
| VC @ IPPM | 77.0 V at 19.5 A - clamped voltage during 1500 W transient; determines worst-case stress on downstream ICs or MOSFETs. |
| PPPM | 1500 W (10/1000 µs waveform) - peak surge handling capacity; validates suitability for lightning-induced transients (IEC 61000-4-5 Level 4). |
| IFSM | 200 A (8.3 ms half-sine) - forward surge rating; supports inrush current immunity in DC power input stages. |
| TJ range | −65 °C to +150 °C - extended junction temperature range enables use in under-hood automotive and industrial environments. |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 7.75 mm × 6.22 mm footprint and cathode band marking; compatible with IPC-7351B land patterns. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; cathode indicated by a visible 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 terminal / high-voltage side | Marked with band; connects to line under protection (e.g., 48 V rail); clamps voltage when reverse-biased beyond VWM. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Validated for IEC 61000-4-5 surge immunity up to 4 kV (line-to-ground) without degradation under repetitive duty cycle ≤0.01 %. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during fast transients, protecting 50 V-rated MOSFETs and automotive-grade microcontrollers. |
| Halogen-free & RoHS-compliant (M3 suffix) | Meets EU Directive 2011/65/EU and JEDEC J-STD-20E; suitable for green manufacturing and export-controlled applications. |
| MSL Level 1 moisture sensitivity | Enables standard reflow without baking; supports high-throughput SMT assembly with peak profile up to 260 °C. |
| Temperature coefficient of VBR | +0.103 %/°C - predictable drift allows accurate thermal margining across −40 °C to +125 °C ambient ranges. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects 48 V supply inputs in BCM modules against load-dump spikes (ISO 7637-2 Pulse 5a) and ESD events from switch actuation. IC Role / Device Role: Unidirectional shunt TVS placed between VBAT and chassis ground, upstream of DC-DC converter input. Use Value: Clamps 120 V/100 ms load dump to ≤77 V, preventing damage to 60 V-rated buck controller ICs and ensuring ASIL-B compliance. |
Use Scenario: Shields 24 V digital input channels of programmable logic controllers from field-wiring surges and inductive kickback. IC Role / Device Role: Standoff-rated TVS on each channel's input node, paired with series current-limiting resistor. Use Value: Limits transient voltage to <80 V during 1 kV/500 Ω IEC 61000-4-4 burst events, preserving optocoupler isolation integrity and input logic thresholds. |
| Telecom Power Supply Front-End | Consumer Appliance Motor Drive Board |
Use Scenario: Guards primary-side DC bus (48 V) in telecom rectifier modules against lightning-induced surges on AC input lines. IC Role / Device Role: Secondary-stage TVS after MOV and common-mode choke, providing fine-clamp protection before bulk capacitors. Use Value: Delivers 1500 W pulse handling with <1 ns response, reducing capacitor stress and extending hold-up time reliability. |
Use Scenario: Suppresses commutation spikes from brushed DC motors in washing machine control boards. IC Role / Device Role: Unidirectional TVS across motor terminals, referenced to local ground plane. Use Value: Clamps 100 V inductive spikes to 77 V within 100 ps, preventing gate oxide failure in 100 V N-channel H-bridge MOSFETs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56A-E3/52T | Same VBR (53.2–58.8 V) and VC (77 V), but lower PPPM = 600 W in SMB package; RθJA = 85 °C/W. | Limited to lower-energy transients (IEC 61000-4-5 Level 2); unsuitable for automotive load-dump or industrial 4 kV surges. | Select when board space is constrained and surge threat level is ≤600 W; verify thermal margin with smaller pad area. |
| 1.5KE56A-T | Through-hole DO-201 package; identical VBR, VC, and PPPM; higher IFSM = 225 A but no MSL Level 1 rating. | Requires wave soldering or hand assembly; incompatible with fully automated SMT lines and high-moisture environments. | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with 1.5SMC56A-M3/57T, SMBJ56A-E3/52T trades surge robustness for compact size, while 1.5KE56A-T retains full power rating but sacrifices SMT manufacturability and moisture resistance - making 1.5SMC56A-M3/57T the optimal choice for high-volume, AEC-Q101-aligned automotive and industrial SMT production.
Availability
1.5SMC56A-M3/57T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, telecom power front-ends, and consumer appliance motor control requiring stable component supply and halogen-free compliance.
Supply support for 1.5SMC56A-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 devices, and power MOSFETs 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, AEC-Q101 readiness, and repeatable clamping performance are mandatory.
FAQ
What is the maximum clamping voltage of the 1.5SMC56A-M3/57T under a 10/1000 µs surge?
The 1.5SMC56A-M3/57T has a maximum clamping voltage (VC) of 77.0 V when subjected to its rated peak pulse current of 19.5 A using a 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88303 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for validating compatibility with downstream 50 V or 60 V rated components.
Is the 1.5SMC56A-M3/57T AEC-Q101 qualified?
No, the 1.5SMC56A-M3/57T is not AEC-Q101 qualified. It carries the M3 suffix indicating halogen-free and RoHS-compliant construction, but AEC-Q101 qualification requires the HM3 suffix (e.g., 1.5SMC56AHM3_A/H). For automotive applications demanding AEC-Q101 validation, the HM3 variant must be selected and verified against test reports per the Vishay qualification summary.
What does the "/57T" suffix indicate in 1.5SMC56A-M3/57T?
The "/57T" suffix in 1.5SMC56A-M3/57T specifies packaging: 7-inch diameter plastic tape-and-reel with 850 units per reel. This format is optimized for high-speed pick-and-place SMT assembly. The "57T" code aligns with Vishay's ordering nomenclature in Document 88303 and confirms compliance with EIA-481-D standards for automated handling.
How does the thermal resistance of the 1.5SMC56A-M3/57T affect PCB layout?
The 1.5SMC56A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C under 6.5 W steady-state dissipation, designers must allocate ≥64 mm² of 2-oz copper per pad and avoid thermal isolation - undersized pads increase RθJA and risk premature thermal shutdown during repetitive surges.
Can the 1.5SMC56A-M3/57T be used in bidirectional configurations?
No, the 1.5SMC56A-M3/57T is strictly unidirectional. Bidirectional variants use the "CA" suffix (e.g., 1.5SMC56CA). Using the unidirectional 1.5SMC56A-M3/57T in a bidirectional signal path would result in forward conduction during negative transients, causing failure. Always match device polarity to circuit topology - cathode band must face the protected line's positive side.
1.5SMC56A-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):
- 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-M3/57T FAQ
1.How can I place an order for 1.5SMC56A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56A-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 1.5SMC56A-M3/57T reliable?
The price and inventory of 1.5SMC56A-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 1.5SMC56A-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC56A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56A-M3/57T?
1.5SMC56A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56A-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 1.5SMC56A-M3/57T?
For technical support, including 1.5SMC56A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56A-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC56A-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56A-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 1.5SMC56A-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC56A-M3/57T?
All 1.5SMC56A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56A-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 1.5SMC56A-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC56A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56A-M3/57T Tags
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