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Vishay General Semiconductor - Diodes Division 1.5SMC56CA-M3/57T
- Part No.:
- 1.5SMC56CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC56CA-M3/57T.pdf
- Description:
- TVS DIODE 47.8VWM 77VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,180
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Product details
Overview
1.5SMC56CA-M3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 56 V standoff voltage (VWM), 77 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 modules, and telecom line protection.
For engineers reviewing the 1.5SMC56CA-M3/57T datasheet, 1.5SMC56CA-M3/57T pinout, 1.5SMC56CA-M3/57T application, or 1.5SMC56CA-M3/57T equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, MSL Level 1 moisture sensitivity, halogen-free RoHS compliance, and AEC-Q101 qualification readiness via HM3 suffix variants.
Technical Context
This device operates as a voltage-clamped crowbar during transients: when reverse (or forward, in bidirectional mode) voltage exceeds its breakdown threshold (~53.2–58.8 V), it avalanches rapidly to divert surge energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surges.
Thermally, it uses the SMC (DO-214AB) package with RθJA = 75 °C/W and RθJL = 15 °C/W, enabling effective heat dissipation when mounted on 8.0 mm × 8.0 mm copper pads. It supports 0.01% duty cycle repetitive operation and meets UL 94 V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 56 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC working margin. |
| VBR (Breakdown) | 53.2–58.8 V at 1 mA - Verified avalanche onset range; ensures consistent triggering across production lots. |
| VC (Clamping) | 77 V at 19.5 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; limits stress on downstream ICs. |
| PPPM | 1500 W - Surge power handling capacity; enables protection against lightning-induced transients (IEC 61000-4-5 Level 4). |
| IPPM | 19.5 A - Peak pulse current supported at rated clamping voltage; determines minimum series impedance required for coordination. |
| TJ max. | +150 °C - Maximum junction temperature; allows operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMC (DO-214AB) - Surface-mount outline with 3.2 mm height and 7.75 mm length; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated. Bidirectional construction has no polarity marking; both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve identically in bidirectional mode; no cathode band marking - enables flexible PCB layout without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN bus) without external polarity management. |
| 1500 W peak pulse power | Withstands 10/1000 μs surges up to 19.5 A - sufficient for IEC 61000-4-5 4 kV open-circuit/2 kA short-circuit test conditions. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profiles up to 260 °C peak - eliminates baking requirements and simplifies manufacturing. |
| Halogen-free & RoHS-compliant (M3) | Meets IPC-1752A material declaration standards and automotive ELV directive; supports green supply chain compliance. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage overshoot during fast transients - critical for protecting 3.3 V or 5 V logic interfaces with tight voltage margins. |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load-dump and ISO 7637-2 pulses. IC Role / Device Role: Bidirectional TVS placed between signal line and ground, shunting transients before they reach ADC input or signal conditioner. Use Value: Maintains signal integrity under ±100 V/50 ms load dump events while surviving >1000 surge cycles per AEC-Q101 qualification. |
Use Scenario: Shielding half-duplex RS-485 transceivers (e.g., SN65HVD230) from ESD and cable discharge events in factory automation networks. IC Role / Device Role: Line-to-ground TVS on A/B differential pair, leveraging symmetrical clamping to prevent common-mode overvoltage damage. Use Value: Clamps transients to ≤77 V within <1 ns, preventing latch-up or gate oxide rupture in transceiver ESD structures. |
| Telecom DSL Line Protection | Consumer USB Port Surge Guard |
Use Scenario: Front-end protection of ADSL/VDSL line drivers subjected to lightning-induced surges on outdoor copper pairs. IC Role / Device Role: Primary surge arrestor in hybrid protection circuit (with gas discharge tube and PTC), placed directly at connector entry point. Use Value: Absorbs first 1500 W surge energy while coordinating with secondary protectors to limit let-through voltage to <100 V. |
Use Scenario: Overvoltage safeguard for USB 2.0 data lines (D+/D−) in portable chargers and docking stations exposed to human-body-model ESD. IC Role / Device Role: Low-capacitance bidirectional clamp (CJ ~200 pF at 0 V) placed inline with data traces to suppress ±15 kV contact ESD. Use Value: Prevents data corruption and PHY damage without degrading 480 Mbps signal integrity due to controlled clamping response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ56CA | Same VWM/VC, but lower PPPM = 600 W; SMB package (smaller footprint, higher RθJA = 110 °C/W). | Limited to lower-energy transients (e.g., HBM ESD); unsuitable for IEC 61000-4-5 Level 3+ or automotive load dump. | Select when board space is constrained and surge threat level is ≤600 W - verify thermal margin with reduced pad area. |
| 1.5KE56CA | Same electrical specs, but axial-leaded DO-201 package; higher mounting inductance and manual assembly requirement. | Not suitable for high-density SMT production; used only in legacy through-hole designs or prototyping. | Choose only for repair, replacement, or low-volume non-automated builds - avoid for new SMT designs requiring AEC-Q101 alignment. |
Compared with SMBJ56CA and 1.5KE56CA, the 1.5SMC56CA-M3/57T delivers optimal balance of 1500 W surge capacity, SMT manufacturability, and automotive-grade process control - making it the preferred choice for volume production of IPC Class 3 and AEC-Q101-targeted systems.
Availability
1.5SMC56CA-M3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial communication interfaces, and telecom infrastructure requiring stable component supply with halogen-free compliance and MSL Level 1 handling.
Supply support for 1.5SMC56CA-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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for demanding industrial and automotive applications.
The 1.5SMC Series was engineered specifically for surface-mount transient suppression in space-constrained, high-surge environments - emphasizing repeatable clamping, low leakage, and compatibility with lead-free reflow processes.
FAQ
What is the clamping voltage of the 1.5SMC56CA-M3/57T under a 10/1000 μs surge?
The 1.5SMC56CA-M3/57T clamps to a maximum of 77 V when subjected to a 19.5 A peak pulse current with a 10/1000 μs waveform. This value is guaranteed across temperature and production lot - critical for ensuring downstream ICs (e.g., microcontrollers or transceivers) remain within absolute maximum ratings during surge events.
Is the 1.5SMC56CA-M3/57T suitable for automotive applications?
Yes - the 1.5SMC56CA-M3/57T is halogen-free and RoHS-compliant (M3 suffix), and belongs to the AEC-Q101-qualified 1.5SMC family. While the base M3 variant is commercial-grade, its construction (glass-passivated junction, MSL Level 1, 150 °C TJ max) aligns with automotive environmental requirements; AEC-Q101 qualified versions use HM3 suffix (e.g., 1.5SMC56CAHM3_A/H).
How does the bidirectional design of the 1.5SMC56CA-M3/57T affect PCB layout?
The 1.5SMC56CA-M3/57T has no polarity marking and identical terminal behavior in both directions, eliminating orientation constraints during placement. This simplifies layout for AC-coupled or differential lines (e.g., CAN, RS-485), reduces assembly errors, and avoids need for duplicate unidirectional devices in complementary configurations.
What is the thermal resistance of the 1.5SMC56CA-M3/57T, and how does it impact derating?
The 1.5SMC56CA-M3/57T has RθJA = 75 °C/W (typical) when mounted on 8.0 mm × 8.0 mm copper pads. At ambient temperatures above 25 °C, its peak pulse power must be derated per Figure 2 in the datasheet - e.g., at 75 °C ambient, usable PPPM drops to ~1100 W, requiring verification of worst-case surge energy in thermally dense layouts.
Does the 1.5SMC56CA-M3/57T meet UL recognition requirements?
Yes - the 1.5SMC56CA-M3/57T carries Underwriters Laboratories recognition (QVGQ2) under UL 497B for protector classification, with file number E136766. This certification validates its performance in telecom and industrial surge protection applications where third-party safety approval is mandated.
1.5SMC56CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
1.5SMC56CA-M3/57T FAQ
1.How can I place an order for 1.5SMC56CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC56CA-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 1.5SMC56CA-M3/57T reliable?
The price and inventory of 1.5SMC56CA-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 1.5SMC56CA-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC56CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC56CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC56CA-M3/57T?
1.5SMC56CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC56CA-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 1.5SMC56CA-M3/57T?
For technical support, including 1.5SMC56CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC56CA-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC56CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC56CA-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 1.5SMC56CA-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC56CA-M3/57T?
All 1.5SMC56CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC56CA-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 1.5SMC56CA-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC56CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC56CA-M3/57T Tags
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Toshiba Semiconductor and Storage
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