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Vishay General Semiconductor - Diodes Division 1.5SMC120CA-E3/57T
- Part No.:
- 1.5SMC120CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC120CA-E3/57T.pdf
- Description:
- TVS DIODE 102VWM 165VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:537
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Product details
Overview
1.5SMC120CA-E3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 120 V standoff voltage (VWM), 137 V clamping voltage (VC) at 9.1 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 1.5SMC120CA-E3/57T datasheet, 1.5SMC120CA-E3/57T pinout, 1.5SMC120CA-E3/57T application, or 1.5SMC120CA-E3/57T equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, MSL Level 1 moisture sensitivity, and AEC-Q101 qualification readiness via HE3 suffix variants.
Technical Context
This device operates as a voltage-clamped shunt protector: during transients exceeding its reverse standoff voltage (VWM = 120 V), it avalanches symmetrically in both directions to limit voltage across protected circuitry. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns).
Thermally, it delivers 6.5 W steady-state power dissipation on an infinite heatsink at 50 °C ambient, with junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W - enabling reliable operation up to TJ = 150 °C under repetitive surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 120 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 120 V nominal systems. |
| VBR (Breakdown) | 114–126 V at 1 mA - verified avalanche onset range ensuring consistent turn-on threshold across production lots. |
| VC (Clamping) | 165 V at IPPM = 9.1 A - peak voltage seen by protected circuit during 10/1000 μs transient; critical for IC-level stress budgeting. |
| PPPM | 1500 W - peak pulse power handling with 10/1000 μs waveform; supports lightning surge immunity per IEC 61000-4-5 Level 4. |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement for thermal derating compliance. |
| Temperature Range | −65 °C to +150 °C - enables deployment in under-hood automotive, industrial control cabinets, and outdoor telecom enclosures. |
| RoHS Status | RoHS-compliant (E3 suffix), halogen-free option available (M3); meets JESD201 Class 2 whisker resistance. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; polarity unmarked for bidirectional operation; UL 94 V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | One terminal of symmetrical PN junction; accepts surge current in either polarity without polarity marking. |
| Cathode | Transient current exit (reverse bias) | Second terminal of symmetrical PN junction; completes low-impedance shunt path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC performance in both directions - eliminates need for polarity-aware layout in AC-coupled or floating signal lines. |
| 1500 W peak pulse power | Withstands 10/1000 μs surges up to 9.1 A - meets IEC 61000-4-5 surge immunity requirements for industrial and automotive applications. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during clamping - reduces stress on downstream MOSFETs, microcontrollers, and analog front-ends. |
| MSL Level 1 rating | Reflow-compatible without dry-packaging or baking - supports standard SMT assembly at peak temperature ≤260 °C. |
| AEC-Q101 qualification path | HE3/HM3 variants available - enables direct migration to automotive-grade designs requiring qualified TVS components. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed across differential signal pair or supply rail to divert transients before reaching sensitive interface ICs. Use Value: Maintains signal integrity during 12 V/24 V system load dump events (ISO 7637-2 Pulse 5a) with clamping below 165 V. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers against induced surges from relay coil switching and motor drives. IC Role / Device Role / Timing Role: Parallel-connected TVS on 24 V DC input terminals to clamp fast-rising transients before they propagate into optocoupler or MCU input stages. Use Value: Limits transient voltage to ≤165 V within <1 ns, preventing false triggering or latch-up in industrial control logic. |
| Telecom Line Interface | Consumer Power Adapter Output |
|
Use Scenario: Shielding Ethernet PHYs and PoE injectors from lightning-induced surges on twisted-pair data lines in outdoor access points. IC Role / Device Role / Timing Role: Bidirectional TVS placed across each differential pair (e.g., TX+/TX−) to suppress common-mode and differential-mode transients. Use Value: Symmetric clamping ensures balanced suppression without skewing differential signaling; 1500 W rating covers IEC 61000-4-5 Level 4 test profiles. |
Use Scenario: Secondary-side overvoltage protection on 12 V/19 V outputs of wall adapters used in laptops and monitors. IC Role / Device Role / Timing Role: Shunt limiter installed between output rail and ground to absorb residual switching spikes and external surges after primary-side regulation. Use Value: Clamps output to ≤165 V during fault conditions, preventing damage to connected devices while maintaining RoHS-compliant bill-of-materials. |
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 PPPM (600 W), same VWM (120 V), SMB package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 without parallel staging | Select when board space is constrained and surge energy is ≤600 W; verify thermal margin with reduced copper area. |
| 1.5KE120CA | Through-hole DO-201 package, identical electrical specs but incompatible with SMT assembly | Requires manual or wave-solder process; not viable for high-volume automated production | Choose only for legacy through-hole designs or prototyping where rework flexibility outweighs automation needs. |
Compared with SMBJ120CA and 1.5KE120CA, the 1.5SMC120CA-E3/57T uniquely balances 1500 W surge capacity, SMC surface-mount compatibility, and bidirectional symmetry - making it optimal for new automotive and industrial PCB designs requiring automated assembly and high-energy transient resilience.
Availability
1.5SMC120CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC120CA-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, and protection devices with emphasis on reliability, ruggedness, and automotive-grade qualification.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where compact size, repeatable clamping, and AEC-Q101 readiness are essential.
FAQ
What does the "CA" suffix indicate in 1.5SMC120CA-E3/57T?
The "CA" suffix in 1.5SMC120CA-E3/57T denotes a bidirectional configuration - meaning the device provides symmetrical transient voltage suppression in both polarities, with identical breakdown and clamping characteristics regardless of voltage polarity applied across its terminals. This eliminates polarity marking and simplifies layout for AC-coupled or floating circuits.
Is 1.5SMC120CA-E3/57T RoHS-compliant and lead-free?
Yes, the "E3" suffix in 1.5SMC120CA-E3/57T certifies full RoHS compliance and lead-free construction per EU Directive 2011/65/EU. The matte tin-plated leads meet J-STD-002 solderability standards and JESD201 Class 2 whisker resistance requirements, supporting lead-free reflow processes up to 260 °C.
What is the maximum clamping voltage of 1.5SMC120CA-E3/57T and under what test condition?
The maximum clamping voltage (VC) of 1.5SMC120CA-E3/57T is 165 V, measured at a peak pulse current (IPPM) of 9.1 A using the standardized 10/1000 μs double-exponential waveform. This value represents the worst-case voltage imposed on protected circuitry during a high-energy transient event.
Can 1.5SMC120CA-E3/57T be used in automotive applications?
While the base 1.5SMC120CA-E3/57T is commercial-grade, Vishay offers AEC-Q101-qualified variants (e.g., 1.5SMC120CAHE3_A) with identical electrical specs and enhanced reliability testing. For automotive use, specify the HE3 or HM3 suffix to ensure qualification for under-hood and safety-critical subsystems.
What is the thermal resistance and how does it affect PCB layout for 1.5SMC120CA-E3/57T?
The 1.5SMC120CA-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. To maintain safe junction temperatures under sustained surge duty, PCB layout must allocate adequate copper area and avoid thermal isolation - especially critical in high-repetition-rate industrial environments.
1.5SMC120CA-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:
- -
- 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-E3/57T FAQ
1.How can I place an order for 1.5SMC120CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC120CA-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 1.5SMC120CA-E3/57T reliable?
The price and inventory of 1.5SMC120CA-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 1.5SMC120CA-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC120CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC120CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC120CA-E3/57T?
1.5SMC120CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC120CA-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 1.5SMC120CA-E3/57T?
For technical support, including 1.5SMC120CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC120CA-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC120CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC120CA-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 1.5SMC120CA-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC120CA-E3/57T?
All 1.5SMC120CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC120CA-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 1.5SMC120CA-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC120CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC120CA-E3/57T Tags
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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