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Vishay General Semiconductor - Diodes Division 1.5SMC120A-M3/57T
- Part No.:
- 1.5SMC120A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC120A-M3/57T.pdf
- Description:
- TVS DIODE 102VWM 165VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,661
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Product details
Overview
1.5SMC120A-M3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on DC power rails and signal lines. It features 120 V standoff voltage (VWM), 165 V clamping voltage (VC) at 9.1 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive power modules and industrial sensor interfaces.
For engineers reviewing the 1.5SMC120A-M3/57T datasheet, 1.5SMC120A-M3/57T pinout, 1.5SMC120A-M3/57T application, or 1.5SMC120A-M3/57T equivalent, key selection criteria include clamping performance under 10/1000 μs transients, thermal resistance (RθJA = 75 °C/W), unidirectional polarity marking, halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds 120 V (VWM), it avalanches to clamp transients at ≤165 V (VC) while diverting up to 9.1 A (IPPM) without damage. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 μA at VWM).
Designed for surface-mount automated assembly, it uses SMC (DO-214AB) packaging with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102. The cathode band identifies polarity; maximum junction temperature is 150 °C, and thermal resistance from junction to ambient is 75 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 120 V - maximum continuous reverse operating voltage before clamping initiates |
| VC (Clamping Voltage) | 165 V at IPPM = 9.1 A - peak voltage seen by protected circuit during 10/1000 μs surge |
| PPPM (Peak Pulse Power) | 1500 W - energy-handling capability per single 10/1000 μs transient event |
| RθJA | 75 °C/W - thermal resistance limiting power derating above 25 °C ambient |
| TJ max. | +150 °C - maximum allowable junction temperature for reliable long-term operation |
| Leakage (ID at VWM) | ≤1.0 μA - minimal loading on protected line under normal operating conditions |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; cathode identified by black band on body; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to lower-potential side of protected circuit | Enables low VF conduction during fault; must be routed to ground or return path in unidirectional configuration |
| Cathode | Current exit terminal in forward bias; marked with band; reverse-biased during clamping | Connected to line being protected (e.g., 12 V rail); avalanche occurs between cathode and anode when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Withstands high-energy surges common in automotive load-dump and industrial switching events |
| Low clamping ratio (VC/VWM = 1.375) | Minimizes overvoltage stress on downstream ICs like microcontrollers and CAN transceivers |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and industrial end equipment |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without moisture sensitivity concerns |
| AEC-Q101 qualification option | Base P/NHM3_X variant supports automotive-grade reliability validation for powertrain and body electronics |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against ISO 7637-2 pulse 5a (load dump) and ESD events. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between power rail and chassis ground. Use Value: Clamps transients to ≤165 V within nanoseconds, preventing latch-up or gate oxide failure in MCU power supplies. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) and digital I/O (e.g., RS-485) in factory automation sensors. IC Role / Device Role / Timing Role: Unidirectional TVS mounted across signal-to-ground to absorb induced lightning surges and switching noise. Use Value: Limits voltage excursion to safe levels while maintaining <1.0 μA leakage, preserving signal integrity and ADC accuracy. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Securing -48 V telecom rectifier outputs against AC line transients and hot-swap surges. IC Role / Device Role / Timing Role: Reverse-polarity TVS configured between input rail and system ground. Use Value: Handles 1500 W pulses without degradation, enabling robust front-end protection in base station power supplies. |
Use Scenario: Adding secondary surge immunity to USB VBUS lines in portable medical monitors and smart home hubs. IC Role / Device Role / Timing Role: Unidirectional clamping device placed between VBUS and GND, upstream of USB controller. Use Value: Provides sub-100 ns response and 165 V clamping to prevent damage from ESD and cable-induced spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A | Lower PPPM (600 W), same VWM (120 V), SMB package (smaller footprint, higher RθJA = 85 °C/W) | Less suitable for high-repetition or high-energy surges; preferred where board space is constrained | Select when peak surge energy is ≤600 W and thermal margin allows higher junction temperature rise |
| 1.5KE120A | Same VWM/VC specs but axial DO-15 package; higher mechanical profile; not SMT-compatible | Requires through-hole assembly; unsuitable for automated SMT lines or dense PCB layouts | Choose only for legacy through-hole designs or prototyping where rework tolerance outweighs production efficiency |
Compared with SMBJ120A and 1.5KE120A, the 1.5SMC120A-M3/57T delivers 2.5× higher surge power handling in an SMT-optimized package with superior thermal performance (RθJA = 75 °C/W vs. 85 °C/W) and halogen-free compliance - making it the preferred choice for volume automotive and industrial production.
Availability
1.5SMC120A-M3/57T is available at Aetrix Electronics and suitable for automotive power modules, industrial sensor interfaces, telecom DC inputs, and consumer USB port protection requiring stable component supply and full traceability.
Supply support for 1.5SMC120A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The 1.5SMC Series targets high-power transient suppression in harsh environments - engineered for automotive, industrial, and telecom systems where robustness against lightning, ESD, and load-dump events is critical.
FAQ
What is the clamping voltage of the 1.5SMC120A-M3/57T under a 10/1000 μs surge?
The 1.5SMC120A-M3/57T clamps to a maximum of 165 V when subjected to its rated peak pulse current of 9.1 A with a 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88303 and defines the upper voltage limit imposed on protected circuitry during transient events.
Is the 1.5SMC120A-M3/57T RoHS-compliant and halogen-free?
Yes, the 1.5SMC120A-M3/57T carries the M3 suffix, indicating full RoHS compliance and halogen-free construction per Vishay's material categorization standards. This meets IPC-1752A and EU Directive 2015/863 requirements for restricted substances.
Does the 1.5SMC120A-M3/57T have AEC-Q101 qualification?
The base 1.5SMC120A-M3/57T is commercial-grade; however, the HM3 variant (e.g., 1.5SMC120AHM3_A/H) is AEC-Q101 qualified. For automotive applications requiring qualification, specify the HM3 suffix and revision code - the 1.5SMC120A-M3/57T itself is not certified but shares identical electrical and thermal characteristics.
What is the thermal resistance of the 1.5SMC120A-M3/57T, and how does it affect power derating?
The 1.5SMC120A-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. At 75 °C ambient, its 6.5 W steady-state power dissipation derates to ~4.3 W - requiring layout attention to thermal pads and airflow in enclosed enclosures.
How is polarity identified on the 1.5SMC120A-M3/57T package?
The 1.5SMC120A-M3/57T uses a unidirectional configuration with cathode indicated by a visible black band on the SMC (DO-214AB) body. During PCB layout, the banded end must connect to the line being protected (e.g., +12 V rail), while the anode connects to ground - reversing this connection disables clamping functionality.
1.5SMC120A-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):
- 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)
1.5SMC120A-M3/57T FAQ
1.How can I place an order for 1.5SMC120A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC120A-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 1.5SMC120A-M3/57T reliable?
The price and inventory of 1.5SMC120A-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 1.5SMC120A-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC120A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC120A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC120A-M3/57T?
1.5SMC120A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC120A-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 1.5SMC120A-M3/57T?
For technical support, including 1.5SMC120A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC120A-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC120A-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC120A-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 1.5SMC120A-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC120A-M3/57T?
All 1.5SMC120A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC120A-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 1.5SMC120A-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC120A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC120A-M3/57T Tags
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