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Vishay General Semiconductor - Diodes Division 1.5SMC20A-M3/9AT
- Part No.:
- 1.5SMC20A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC20A-M3/9AT.pdf
- Description:
- TVS DIODE 17.1VWM 27.7VC SMC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
1.5SMC20A-M3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, designed for high-energy surge protection. It features a 20 V standoff voltage (VWM), 21.0 V maximum breakdown voltage (VBR), 27.7 V clamping voltage at 54.2 A peak pulse current (IPPM), and 1500 W peak pulse power capability with a 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines against lightning-induced transients and inductive switching spikes.
For engineers reviewing the 1.5SMC20A-M3/9AT datasheet, 1.5SMC20A-M3/9AT pinout, 1.5SMC20A-M3/9AT application, or 1.5SMC20A-M3/9AT equivalent, this device delivers verified clamping performance, halogen-free RoHS compliance (M3 suffix), MSL Level 1 moisture sensitivity, and AEC-Q101 qualification readiness - critical for automotive, industrial, and telecom power rail and interface line protection.
Technical Context
This unidirectional TVS diode operates by avalanche breakdown to clamp transient overvoltages above its VBR (19.0–21.0 V) while maintaining low leakage (<1.0 μA at 17.1 V). Its glass-passivated junction ensures stable parametric behavior and fast response time (<1.0 ns), enabling effective suppression of ESD and fast-rising surges before downstream components are damaged.
The 1.5SMC20A-M3/9AT is rated for 150 °C maximum junction temperature and exhibits a positive temperature coefficient of VBR (+0.090 %/°C), supporting predictable derating across operating temperatures. Its thermal resistance (RθJA = 75 °C/W) and RθJL = 15 °C/W allow reliable operation on standard 8.0 mm × 8.0 mm copper pads without active cooling in most embedded applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17.1 V - Maximum continuous reverse working voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 19.0–21.0 V at 1.0 mA - Voltage at which avalanche conduction initiates; tight tolerance enables precise overvoltage trip point selection. |
| VC (Clamping Voltage) | 27.7 V at IPPM = 54.2 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 1500 W - Maximum transient energy absorption capability under standardized 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 compliance. |
| ID (Reverse Leakage) | <1.0 μA at VWM - Minimal standby current draw; preserves battery life and avoids false triggering in low-power sensor interfaces. |
| TJ max. | 150 °C - Maximum junction temperature rating; enables use in under-hood automotive and industrial environments with minimal derating. |
| Package | SMC (DO-214AB) - Surface-mount package with 3.2 mm minimum cathode-to-anode distance; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection in unidirectional configuration | Connected to protected line (e.g., VBUS or signal); clamps positive transients to ground when referenced to anode. |
| Anode | Reference terminal | Typically tied to system ground or common return; establishes polarity-sensitive clamping path for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against severe lightning surges (IEC 61000-4-5) without sacrificing board space. |
| Glass-passivated junction | Ensures long-term parameter stability and low leakage drift across temperature and lifetime cycling. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and industrial OEM supply chains. |
| AEC-Q101 qualification option | Supports automotive-grade reliability validation (via HE3/HM3 variants); base M3 variant shares identical die and construction. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients, improving protection margin for sensitive ICs. |
Applications
| Automotive Sensor Signal Protection | Industrial Motor Drive DC Bus Clamping |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to shunt transient energy before it reaches the transceiver input stage. Use Value: Clamps 27.7 V at 54.2 A, limiting stress on 3.3 V/5 V interface ICs while maintaining <1.0 μA leakage at 17.1 V standby. |
Use Scenario: Safeguarding gate drivers and microcontrollers connected to 24 V DC bus in servo drives and PLC output modules. IC Role / Device Role / Timing Role: Mounted across DC bus rails to suppress inductive kickback from relay coils and solenoid switching. Use Value: Absorbs 1500 W surges without degradation, with thermal resistance (RθJA = 75 °C/W) enabling sustained operation on standard PCB copper areas. |
| Telecom Power Input Protection | Consumer USB Port Overvoltage Defense |
Use Scenario: Front-end protection for PoE-powered devices (e.g., IP cameras, access points) against AC/DC adapter transients and Ethernet-coupled surges. IC Role / Device Role / Timing Role: Placed at primary DC input after rectification to clamp surges before DC-DC converters and PMICs. Use Value: Withstands repetitive 10/1000 μs events at 0.01% duty cycle, ensuring longevity in always-on network infrastructure. |
Use Scenario: Shielding USB 2.0 data lines and VBUS from ESD (IEC 61000-4-2 ±15 kV contact) and hot-plug induced overshoot. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on VBUS line to prevent overvoltage damage to USB controller and charging ICs. Use Value: Fast <1 ns response and 27.7 V clamping ensure USB 2.0 eye diagram integrity remains intact during transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | Lower PPPM (600 W), same VWM/VBR range, SMB package (smaller footprint, higher RθJA) | Less robust for high-energy surges; suitable only for lower-risk consumer interfaces | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 ESD only. |
| 1.5KE20A | Through-hole DO-201 package, identical electrical specs but incompatible with SMT assembly | Requires manual or wave soldering; not viable for automated production or compact designs | Choose only for legacy through-hole systems where rework or prototyping justifies non-SMT form factor. |
Compared with SMBJ20A and 1.5KE20A, the 1.5SMC20A-M3/9AT uniquely balances 1500 W surge capacity, SMC surface-mount compatibility, and halogen-free compliance - making it the preferred choice for volume-manufactured automotive and industrial electronics requiring both performance and process scalability.
Availability
1.5SMC20A-M3/9AT is available at Aetrix Electronics and suitable for automotive sensor protection, industrial motor drive clamping, and telecom power input protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1.5SMC20A-M3/9AT 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, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power transient suppression in space-constrained surface-mount applications - targeting automotive, industrial, and communications systems where robustness, repeatability, and regulatory compliance are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC20A-M3/9AT under a 10/1000 μs surge?
The 1.5SMC20A-M3/9AT has a maximum clamping voltage (VC) of 27.7 V at 54.2 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per industry-standard test conditions and defines the upper voltage limit imposed on protected circuits during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the 1.5SMC20A-M3/9AT RoHS-compliant and halogen-free?
Yes, the 1.5SMC20A-M3/9AT carries the M3 suffix, indicating it is both RoHS-compliant and halogen-free per JEDEC standards. This meets stringent environmental requirements for automotive and industrial OEMs, including compliance with EU RoHS Directive 2011/65/EU and IPC-1752A material declarations.
Does the 1.5SMC20A-M3/9AT have AEC-Q101 qualification?
The base 1.5SMC20A-M3/9AT is not AEC-Q101 qualified, but Vishay offers AEC-Q101-qualified versions under ordering codes HM3_A or HE3_A (e.g., 1.5SMC20AHM3_A/I). These share identical electrical characteristics and packaging, differing only in additional reliability testing and traceability documentation required for automotive use.
What is the maximum operating temperature for the 1.5SMC20A-M3/9AT?
The 1.5SMC20A-M3/9AT has a maximum junction temperature (TJ max.) of +150 °C and an operating junction/storage temperature range of –65 °C to +150 °C. This allows deployment in under-hood automotive environments and high-temperature industrial enclosures without derating concerns up to ambient temperatures of ~100 °C on standard PCB layouts.
How does the 1.5SMC20A-M3/9AT compare to bidirectional TVS diodes like 1.5SMC20CA?
The 1.5SMC20A-M3/9AT is unidirectional and intended for DC line protection where polarity is fixed (e.g., VBUS, power rails), while 1.5SMC20CA is bidirectional and suited for AC or differential signal lines (e.g., RS-485, audio). Their VWM, VBR, and VC values differ slightly due to internal structure - the 1.5SMC20A-M3/9AT offers tighter leakage control and optimized clamping for single-polarity threats.
1.5SMC20A-M3/9AT 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):
- 17.1V
- Voltage - Breakdown (Min):
- 19V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 54.2A
- 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)
1.5SMC20A-M3/9AT FAQ
1.How can I place an order for 1.5SMC20A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC20A-M3/9AT 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 1.5SMC20A-M3/9AT reliable?
The price and inventory of 1.5SMC20A-M3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC20A-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC20A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC20A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC20A-M3/9AT?
1.5SMC20A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC20A-M3/9AT 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 1.5SMC20A-M3/9AT?
For technical support, including 1.5SMC20A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC20A-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC20A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC20A-M3/9AT 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 1.5SMC20A-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC20A-M3/9AT?
All 1.5SMC20A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC20A-M3/9AT, 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 1.5SMC20A-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC20A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC20A-M3/9AT Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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