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Vishay General Semiconductor - Diodes Division 1.5SMC120A-E3/57T
- Part No.:
- 1.5SMC120A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC120A-E3/57T.pdf
- Description:
- TVS DIODE 102VWM 165VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:739
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Product details
Overview
1.5SMC120A-E3/57T 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 120 V standoff voltage (VWM), 165 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 cards to suppress lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5SMC120A-E3/57T datasheet, 1.5SMC120A-E3/57T pinout, 1.5SMC120A-E3/57T application, or 1.5SMC120A-E3/57T equivalent, this page delivers verified electrical parameters, SMC (DO-214AB) package details, polarity marking guidance, thermal derating curves, and AEC-Q101-compliant alternatives for automotive-grade design-in.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 102 V), then rapidly avalanches below its 114–126 V breakdown threshold (VBR at 1 mA) to clamp transient energy. Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance.
Thermally, it uses the SMC (DO-214AB) package with RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = 150 °C. The cathode band marking aligns with JEDEC-standard polarity identification, and its MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 102 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin below clamping. |
| VBR (Breakdown) | 114–126 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC (Clamping) | 165 V at IPPM = 9.1 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; critical for IC survival. |
| PPPM | 1500 W - Peak pulse power handling capacity; determines survivability against lightning (IEC 61000-4-5) and EFT events. |
| ID (Leakage) | 1.0 µA max at VWM - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss. |
| TJ max | 150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement; supports automated placement and IPC-compliant reflow. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 compliant. Cathode identified by a single black band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to ground or low-impedance return path in unidirectional TVS configuration. |
| Cathode | Current exit terminal during reverse avalanche | Connected to protected line; band-marked end - critical for correct orientation in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 Level 4 (4 kV surge) without external series impedance. |
| Glass-passivated junction | Ensures stable, repeatable avalanche behavior across temperature and lifetime; eliminates parameter drift. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns response time). |
| AEC-Q101 qualified variant available | Supports automotive applications requiring qualification per stress test standard (e.g., 1.5SMC120AHE3_A). |
| RoHS-compliant, halogen-free options | Meets global environmental regulations including JESD201 Class 2 whisker resistance and UL 94 V-0 flammability. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional shunt clamping device placed between signal line and chassis ground. Use Value: Clamps transients to ≤165 V while maintaining <1 µA leakage at 102 V - preserving sensor accuracy and MCU input thresholds. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring surges and relay contact bounce. IC Role / Device Role / Timing Role: Primary overvoltage clamp on front-end signal conditioning stage before optocoupler isolation. Use Value: Absorbs 1500 W surge energy without degradation, enabling >100,000 surge cycles per IEC 61000-4-5. |
| Telecom Line Card Surge Protection | Power Supply Input Stage Clamp |
Use Scenario: Secondary protection on Ethernet PHY or xDSL line drivers exposed to induced lightning surges per GR-1089-CORE. IC Role / Device Role / Timing Role: Fast-response parallel clamp downstream of gas discharge tube (GDT) primary protection. Use Value: Sub-1 ns response time and 165 V clamping limit ensure PHY ICs remain within absolute maximum ratings during combined GDT-TVSS coordination. |
Use Scenario: Input rail protection for 120 V AC/DC switch-mode power supplies against mains-borne transients (IEC 61000-4-4/5). IC Role / Device Role / Timing Role: Unidirectional TVS connected between bulk capacitor positive rail and chassis ground. Use Value: Withstands 200 A non-repetitive forward surge (IFSM), preventing catastrophic failure during sustained overvoltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A-E3/52 | Lower PPPM (600 W), same VWM (102 V), SMB package (smaller footprint, higher RθJA = 110 °C/W) | Best suited for space-constrained consumer electronics where 1500 W surge margin is not required. | Select when board area is limited and surge threat level is ≤Level 3 (2 kV) per IEC 61000-4-5. |
| 1.5SMC120AHE3_A | Identical electrical specs; AEC-Q101 qualified, RoHS-compliant, automotive-grade screening and traceability | Required for production automotive ECUs, ADAS sensors, and infotainment systems needing full qualification documentation. | Choose for automotive programs where AEC-Q101 compliance, lot traceability, and extended temperature validation are mandatory. |
Compared with SMBJ120A-E3/52, the 1.5SMC120A-E3/57T delivers 2.5× higher surge power handling and lower thermal resistance; versus 1.5SMC120AHE3_A, it lacks automotive qualification but offers identical performance at commercial-grade cost and lead time.
Availability
1.5SMC120A-E3/57T is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line card designs requiring stable component supply, RoHS-compliant packaging, and proven 1500 W transient immunity.
Supply support for 1.5SMC120A-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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, repeatable clamping, and long-term stability are non-negotiable.
FAQ
What is the clamping voltage of the 1.5SMC120A-E3/57T at its rated peak pulse current?
The 1.5SMC120A-E3/57T has a maximum clamping voltage (VC) of 165 V when subjected to its specified peak pulse current (IPPM) of 9.1 A with 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 the protected circuit during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is the 1.5SMC120A-E3/57T suitable for automotive applications?
The 1.5SMC120A-E3/57T is RoHS-compliant and manufactured to commercial-grade specifications. While it shares identical electrical characteristics with the AEC-Q101-qualified 1.5SMC120AHE3_A, the 1.5SMC120A-E3/57T itself is not AEC-Q101 certified. For production automotive use, engineers must select the HE3-suffixed variant; the 1.5SMC120A-E3/57T is appropriate for prototyping, industrial, or telecom applications where automotive qualification is not mandated.
How does the 1.5SMC120A-E3/57T differ from bidirectional variants like 1.5SMC120CA?
The 1.5SMC120A-E3/57T is unidirectional and features a cathode band for polarity-sensitive placement, whereas 1.5SMC120CA is bidirectional with no polarity marking and symmetric clamping in both directions. The 1.5SMC120A-E3/57T provides lower leakage (<1 µA at 102 V) and is used where DC bias exists (e.g., power rails); the CA version suits AC-coupled signal lines like RS-485 or Ethernet pairs where voltage polarity reverses.
What is the thermal resistance and maximum operating temperature of the 1.5SMC120A-E3/57T?
The 1.5SMC120A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and a maximum junction temperature (TJ max) of +150 °C. These values assume mounting on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per datasheet Fig. 2. Derating begins above TA = 25 °C, with full power (6.5 W) only sustainable at ambient ≤50 °C on an infinite heatsink.
Does the 1.5SMC120A-E3/57T require a heatsink for standard operation?
No external heatsink is required for transient suppression duty due to its pulsed nature; however, for continuous power dissipation (e.g., in high-leakage fault conditions), thermal design must account for RθJA = 75 °C/W. Under normal operation - where the device conducts only during microsecond-scale surges - PCB copper area (per recommended 8.0 mm × 8.0 mm pads) provides sufficient thermal mass and conduction to maintain TJ ≤150 °C without added heatsinking.
1.5SMC120A-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:
- 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-E3/57T FAQ
1.How can I place an order for 1.5SMC120A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC120A-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 1.5SMC120A-E3/57T reliable?
The price and inventory of 1.5SMC120A-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 1.5SMC120A-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC120A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC120A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC120A-E3/57T?
1.5SMC120A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC120A-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 1.5SMC120A-E3/57T?
For technical support, including 1.5SMC120A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC120A-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC120A-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC120A-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 1.5SMC120A-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC120A-E3/57T?
All 1.5SMC120A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC120A-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 1.5SMC120A-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC120A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC120A-E3/57T Tags
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