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Vishay General Semiconductor - Diodes Division 1.5SMC120CA-M3/57T
- Part No.:
- 1.5SMC120CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC120CA-M3/57T.pdf
- Description:
- TVS DIODE 102VWM 165VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,598
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Product details
Overview
1.5SMC120CA-M3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 120 V standoff voltage (VWM), 165 V clamping voltage (VC) at 9.1 A peak pulse current, and 1500 W peak pulse power with 10/1000 μs waveform - deployed for lightning and inductive-switching surge protection on automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the 1.5SMC120CA-M3/57T datasheet, 1.5SMC120CA-M3/57T pinout, 1.5SMC120CA-M3/57T application, or 1.5SMC120CA-M3/57T equivalent, key selection considerations include bidirectional clamping behavior, M3 halogen-free RoHS compliance, 150 °C max junction temperature, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped transient protector with symmetrical breakdown in both directions due to its bidirectional construction - no polarity marking required. It delivers 165 V clamping voltage at 9.1 A (10/1000 μs), with <0.1% duty cycle repetitive capability and thermal resistance of 75 °C/W (junction-to-ambient).
Designed for high-energy transients, it features glass-passivated junction, meets MSL Level 1 per J-STD-020 (260 °C reflow peak), and supports surge currents up to 200 A (8.3 ms half-sine, unidirectional only - not applicable here due to bidirectional configuration).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 102 V - maximum continuous reverse voltage before conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown, min/max) | 114 V / 126 V at 1 mA - verified breakdown range ensures consistent turn-on across production lots. |
| VC (Clamping) | 165 V at IPPM = 9.1 A - limits downstream circuit voltage during 10/1000 μs surge, protecting 120 V-rated ICs. |
| PPPM | 1500 W - peak transient power handling capacity under standardized 10/1000 μs waveform. |
| IPPM | 9.1 A - maximum non-repetitive peak pulse current supported at rated clamping voltage. |
| TJ max | +150 °C - enables reliable operation in under-hood automotive or high-temperature industrial enclosures. |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm body and 2.06 mm height; compatible with standard SMT pick-and-place. |
Pinout & Package
SMC (DO-214AB) package: two-terminal, symmetrical bidirectional device with no polarity marking; terminals are matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction - symmetric conduction path. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; device conducts identically in either direction above VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 1500 W peak pulse power | Handles high-energy surges from lightning-induced transients or relay coil flyback in industrial controls. |
| Halogen-free, RoHS-compliant (M3) | Meets environmental compliance requirements for automotive and EU-based industrial OEMs. |
| MSL Level 1 rating | Supports standard reflow profiles up to 260 °C peak without preconditioning - simplifies manufacturing flow. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive receivers. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector interface to clamp ±100 V transients before reaching signal conditioning circuitry. Use Value: Prevents latch-up or permanent damage to 120 V-tolerant signal chain components while maintaining signal integrity via low capacitance (<100 pF at 0 V). |
Use Scenario: Shielding digital input modules in programmable logic controllers from inductive kickback when switching solenoids or contactors. IC Role / Device Role / Timing Role: Primary surge suppression element across 24 V DC input terminals, coordinated with upstream fuse and filtering. Use Value: Absorbs 1500 W transient energy without degradation, enabling >100,000 surge cycles per MIL-STD-883H Method 3015.8. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Safeguarding Ethernet PHY front-end and PoE injectors against lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: Secondary-level protector downstream of gas discharge tube (GDT), providing fast-response clamping after GDT ionization. Use Value: 165 V clamping ensures Ethernet PHYs (typically rated to 150–170 V abs max) remain within safe operating area during combined-mode surges. |
Use Scenario: Suppressing commutation spikes from universal motor brushes in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge outputs to limit voltage reversal during PWM switching transitions. Use Value: Withstands repetitive 9.1 A pulses at 0.01% duty cycle, extending motor driver MOSFET lifetime by reducing avalanche stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA | Lower peak power (600 W), smaller SMB package (DO-214AA), higher RθJA (110 °C/W). | Suitable for space-constrained consumer electronics where 1500 W is not required. | Select SMBJ120CA only if board layout restricts SMC footprint and surge energy remains ≤600 W. |
| 1.5KE120CA | Through-hole TO-218 package, same 120 V VWM/165 V VC, but slower response and incompatible with SMT automation. | Used in legacy industrial power supplies where manual assembly or high-vibration mounting is acceptable. | Choose 1.5KE120CA only when through-hole assembly is mandated and thermal mass from PCB copper is insufficient for SMC thermal relief. |
Compared with SMBJ120CA and 1.5KE120CA, the 1.5SMC120CA-M3/57T uniquely balances 1500 W surge capacity, SMT manufacturability, and automotive-grade reliability - making it optimal for new designs requiring high-power, surface-mount TVS protection in harsh environments.
Availability
1.5SMC120CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and appliance motor control circuits requiring stable component supply and halogen-free compliance.
Supply support for 1.5SMC120CA-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was developed for high-energy transient suppression in automotive, industrial, and telecom systems - prioritizing robustness, repeatable clamping, and compatibility with automated manufacturing processes.
FAQ
What is the clamping voltage of the 1.5SMC120CA-M3/57T under a 10/1000 μs surge?
The 1.5SMC120CA-M3/57T clamps to a maximum of 165 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 9.1 A. This value is guaranteed per Vishay's datasheet (Document Number: 88303, Rev. 09-Mar-2026) and reflects worst-case performance across temperature and process variation - critical for ensuring downstream 120 V-rated ICs remain within absolute maximum ratings during surge events.
Is the 1.5SMC120CA-M3/57T suitable for automotive applications?
Yes, the 1.5SMC120CA-M3/57T is halogen-free and RoHS-compliant (M3 suffix), and the base 1.5SMC120CA family is AEC-Q101 qualified when ordered with HE3 or HM3 suffixes. While the -M3/57T variant itself is commercial-grade, its construction - including glass-passivated junction, 150 °C TJ max, and MSL Level 1 rating - aligns with automotive under-hood environmental requirements. For certified automotive use, specify 1.5SMC120CAHM3_X with appropriate revision code.
Does the 1.5SMC120CA-M3/57T have polarity markings?
No, the 1.5SMC120CA-M3/57T is a bidirectional TVS diode and carries no polarity marking on its SMC (DO-214AB) package. Its symmetrical structure allows either terminal to serve as anode or cathode depending on transient polarity - eliminating orientation errors during automated placement and simplifying PCB layout for AC or floating signal paths.
What is the thermal resistance of the 1.5SMC120CA-M3/57T?
The 1.5SMC120CA-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes still air conditions and is essential for calculating steady-state junction temperature rise under continuous leakage or repeated surge conditions - particularly relevant in enclosed industrial enclosures with limited airflow.
How does the 1.5SMC120CA-M3/57T differ from unidirectional variants like 1.5SMC120A-M3/57T?
The 1.5SMC120CA-M3/57T is bidirectional with symmetrical clamping in both directions and no cathode band marking, whereas the unidirectional 1.5SMC120A-M3/57T features a cathode band and conducts only in reverse bias. The "CA" suffix explicitly denotes bidirectional functionality, resulting in identical VWM, VBR, and VC values in both polarities - making it mandatory for protecting AC signals, differential buses, or any circuit where voltage reversal occurs during normal operation or fault conditions.
1.5SMC120CA-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):
- 102V
- Voltage - Breakdown (Min):
- 114V
- Voltage - Clamping (Max) @ Ipp:
- 165V
- Current - Peak Pulse (10/1000µs):
- 9.1A
- 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)
1.5SMC120CA-M3/57T FAQ
1.How can I place an order for 1.5SMC120CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC120CA-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 1.5SMC120CA-M3/57T reliable?
The price and inventory of 1.5SMC120CA-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 1.5SMC120CA-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC120CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC120CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC120CA-M3/57T?
1.5SMC120CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC120CA-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 1.5SMC120CA-M3/57T?
For technical support, including 1.5SMC120CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC120CA-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC120CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC120CA-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 1.5SMC120CA-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC120CA-M3/57T?
All 1.5SMC120CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC120CA-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 1.5SMC120CA-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC120CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC120CA-M3/57T Tags
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