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Vishay General Semiconductor - Diodes Division 1.5SMC12A-M3/57T
- Part No.:
- 1.5SMC12A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC12A-M3/57T.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,035
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Product details
Overview
1.5SMC12A-M3/57T 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 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V stand-off voltage (VWM), and clamps transients to ≤16.7 V at 89.8 A peak pulse current (10/1000 µs), delivering 1500 W peak pulse power. It is used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching spikes in automotive and industrial control systems.
For engineers reviewing the 1.5SMC12A-M3/57T datasheet, 1.5SMC12A-M3/57T pinout, 1.5SMC12A-M3/57T application, or 1.5SMC12A-M3/57T equivalent, key selection criteria include its unidirectional polarity, SMC (DO-214AB) package, 1500 W surge rating, low clamping ratio (VC/VBR ≈ 1.39), and halogen-free RoHS-compliant construction per M3 suffix.
Technical Context
The 1.5SMC12A-M3/57T operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ps) to transient events and stable clamping under repetitive 0.01% duty-cycle surges. Its thermal resistance (RθJA = 75 °C/W) and maximum junction temperature of 150 °C support reliable operation on standard PCB copper pads (8.0 mm × 8.0 mm).
It complies with AEC-Q101 qualification when ordered with HE3/HM3 suffixes, though the -M3/57T variant is commercial-grade halogen-free. The cathode band denotes polarity, and it meets UL 94 V-0 flammability and JESD201 Class 2 whisker resistance standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at IT = 1 mA - defines precise avalanche onset for predictable clamping threshold |
| VWM | 10.2 V - maximum continuous reverse voltage before leakage exceeds 5 µA, ensuring no conduction during normal operation |
| VC @ IPPM | ≤16.7 V at 89.8 A (10/1000 µs) - actual clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 1500 W - peak transient power handling capability under standardized surge waveform |
| IFSM | 200 A (8.3 ms half-sine) - surge current tolerance for unidirectional forward conduction during fault conditions |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood automotive or high-ambient industrial environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, guiding heatsinking requirements on standard FR4 PCB |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VLINE > VC |
| Anode (unbanded end) | Reference/ground return | Typically tied to system ground or low-impedance return path for clamping loop integrity |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables protection against severe lightning and load-dump transients without derating in compact SMC footprint |
| Low clamping voltage (VC/VBR ≈ 1.39) | Minimizes stress on downstream components by limiting maximum voltage excursion during clamping |
| Glass-passivated junction | Ensures long-term reliability and stable electrical characteristics across temperature and humidity stress |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for industrial and automotive supply chains without compromising performance |
| MSL Level 1 (J-STD-020), 260 °C reflow compatible | Supports standard lead-free assembly processes without pre-baking or special handling |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs and body control modules from ISO 7637-2 load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients above 16.7 V. Use Value: Prevents latch-up or permanent damage to microcontrollers and CAN transceivers by limiting voltage to safe levels during 100 V/100 ms load dump events. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loops) in PLC I/O modules from field-wiring induced ESD and inductive kickback. IC Role / Device Role / Timing Role: TVS connected across signal and return lines to shunt fast transients before they reach precision DACs or op-amps. Use Value: Maintains signal integrity and measurement accuracy by suppressing sub-100 ns ESD pulses with <1 ps response and low leakage (<5 µA at 10.2 V). |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeds |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters powering USB-C PD devices and smart home hubs. IC Role / Device Role / Timing Role: Unidirectional TVS on +5 V/9 V/12 V output rails to absorb coupling from primary-side MOSFET switching noise. Use Value: Eliminates need for additional RC snubbers by providing deterministic clamping at 16.7 V, reducing BOM count and layout area. |
Use Scenario: DC feed protection in PoE-powered access points and base station remote radios exposed to outdoor lightning coupling. IC Role / Device Role / Timing Role: TVS installed at DC input connector to divert common-mode surges into chassis ground before entering DC/DC converters. Use Value: Achieves IEC 61000-4-5 Level 4 (4 kV) immunity with single-device solution due to 1500 W rating and low Rsurge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | Lower peak power (600 W), same VBR range, SMB package (smaller footprint, higher RθJA) | Less robust for high-energy surges; suitable only for board-level ESD, not lightning or load dump | Select when space-constrained and surge energy is limited to <100 mJ |
| 1.5KE12A | Higher RθJA (100 °C/W), axial-leaded DO-201 package, same 1500 W rating but manual assembly required | Not suitable for automated SMT lines; requires through-hole routing and larger board area | Select only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ12A and 1.5KE12A, the 1.5SMC12A-M3/57T delivers identical 12 V clamping performance in a fully automated SMT package with superior thermal dissipation (RθJA = 75 °C/W vs. 100 °C/W) and halogen-free compliance-making it optimal for high-volume automotive and industrial production.
Availability
1.5SMC12A-M3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom power systems requiring stable component supply, halogen-free compliance, and high-reliability transient suppression.
Supply support for 1.5SMC12A-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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was developed for high-power, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where compact size, high surge capability, and consistent clamping are critical.
FAQ
What is the clamping voltage of the 1.5SMC12A-M3/57T under maximum surge conditions?
The 1.5SMC12A-M3/57T clamps to a maximum of 16.7 V when subjected to its rated peak pulse current of 89.8 A (10/1000 µs waveform). This value is measured per JEDEC standards and guarantees that downstream circuitry sees no more than 16.7 V during transient events, making it suitable for protecting 12 V logic and power rails. The clamping voltage is confirmed in the Vishay datasheet Document Number 88303, page 2.
Is the 1.5SMC12A-M3/57T AEC-Q101 qualified?
No, the 1.5SMC12A-M3/57T is not AEC-Q101 qualified. It carries the M3 suffix indicating halogen-free, RoHS-compliant commercial-grade construction. For AEC-Q101 qualification, Vishay offers variants with HM3 suffix (e.g., 1.5SMC12AHM3_A/H), which undergo additional stress testing for automotive under-hood use. The 1.5SMC12A-M3/57T remains appropriate for industrial and consumer applications meeting commercial reliability requirements.
What does the "/57T" suffix indicate in 1.5SMC12A-M3/57T?
The "/57T" suffix specifies the packaging configuration: 7-inch diameter plastic tape and reel, with 850 units per reel. This format supports high-speed pick-and-place assembly in automated SMT lines. The "57T" designation is defined in Vishay's ordering information table (page 3 of Document Number 88303) and is distinct from "/9AT", which denotes 13-inch reels with 3500 units.
Can the 1.5SMC12A-M3/57T be used in bidirectional applications?
No, the 1.5SMC12A-M3/57T is strictly unidirectional. Its cathode band identifies polarity, and it conducts only when reverse-biased beyond VBR. For bidirectional protection, Vishay offers the 1.5SMC12CA-M3/57T (with "CA" suffix), which provides symmetrical clamping in both directions. Using the unidirectional 1.5SMC12A-M3/57T in AC or floating signal paths may result in unintended forward conduction or failure to suppress negative transients.
What is the maximum operating temperature for the 1.5SMC12A-M3/57T?
The 1.5SMC12A-M3/57T has a specified operating junction temperature range of –65 °C to +150 °C. At ambient temperatures above 25 °C, its peak pulse power must be derated per Figure 2 in the Vishay datasheet (Document Number 88303), with full 1500 W capability only at TA ≤ 25 °C. Its RθJA of 75 °C/W means a 1 W steady-state dissipation raises junction temperature by 75 °C above ambient.
1.5SMC12A-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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 89.8A
- 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)
1.5SMC12A-M3/57T FAQ
1.How can I place an order for 1.5SMC12A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC12A-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 1.5SMC12A-M3/57T reliable?
The price and inventory of 1.5SMC12A-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 1.5SMC12A-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC12A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC12A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC12A-M3/57T?
1.5SMC12A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC12A-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 1.5SMC12A-M3/57T?
For technical support, including 1.5SMC12A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC12A-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC12A-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC12A-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 1.5SMC12A-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC12A-M3/57T?
All 1.5SMC12A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC12A-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 1.5SMC12A-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC12A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC12A-M3/57T Tags
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