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Vishay General Semiconductor - Diodes Division 1.5SMC15A-M3/57T
- Part No.:
- 1.5SMC15A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC15A-M3/57T.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,770
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Product details
Overview
1.5SMC15A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in the SMC (DO-214AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 12.8 V stand-off voltage (VWM), 14.3–15.8 V breakdown voltage (VBR) at 1 mA, 21.2 V maximum clamping voltage (VC) at 70.8 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 μs waveform - ideal for protecting automotive sensor signal lines against ESD and load-switching transients.
For engineers reviewing the 1.5SMC15A-M3/57T datasheet, 1.5SMC15A-M3/57T pinout, 1.5SMC15A-M3/57T application, or 1.5SMC15A-M3/57T equivalent, this page delivers verified electrical parameters, thermal derating behavior, polarity marking guidance, halogen-free RoHS-compliant construction, and real-world use context for industrial and automotive circuit protection design.
Technical Context
The 1.5SMC15A-M3/57T operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response to transient events (<1 ps typical). Its clamping action begins at VWM = 12.8 V and limits surge voltage to ≤21.2 V at IPPM = 70.8 A under standardized 10/1000 μs pulses, with low incremental surge resistance ensuring minimal voltage overshoot during high-current surges.
Thermally, it exhibits RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), supporting reliable operation up to TJ = +150 °C. The device is rated for 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine) and meets J-STD-020 MSL Level 1 with peak reflow temperature of 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 12.8 V - Maximum continuous reverse operating voltage before significant leakage; sets threshold for normal circuit operation without conduction. |
| VBR (Breakdown) | 14.3–15.8 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients above nominal rail. |
| VC (Clamping) | 21.2 V at 70.8 A - Measured peak voltage across device during 10/1000 μs surge; defines worst-case protected node voltage. |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 μs waveform; enables suppression of high-energy lightning-induced surges. |
| IPPM | 70.8 A - Corresponding peak pulse current at VC; used to size PCB trace width and verify system-level surge margin. |
| TJ max. | +150 °C - Maximum junction temperature; supports under-hood automotive deployment with appropriate thermal pad layout. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm copper pads recommended for thermal performance. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential side (e.g., ground or return path); must be routed with low-inductance layout for effective clamping. |
| Cathode | Current exit terminal in forward bias; marked with band | Connected to protected line (e.g., CAN_H, LIN, sensor output); band orientation confirms correct placement on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 4 (4 kV surge) on 50 Ω source impedance lines. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream ICs - critical for 3.3 V or 5 V logic interfaces. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and industrial end equipment without compromising reliability. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling. |
| AEC-Q101 qualified option available | Variant 1.5SMC15AHM3_A/H meets automotive qualification for sensor and body electronics applications. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature sensors exposed to load-dump transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and ECU input, clamping transients within 1 ns to prevent ADC saturation or op-amp latch-up. Use Value: Limits voltage to ≤21.2 V during 70.8 A surges, preserving signal integrity and avoiding microcontroller reset or damage to 5 V tolerant inputs. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers subjected to inductive kickback from solenoid switching. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted directly at connector entry point, shunting energy before reaching isolation barrier or input conditioning circuitry. Use Value: Withstands repetitive 1500 W pulses at 0.01 % duty cycle, eliminating need for external spark gaps or varistors in DIN-rail mounted control cabinets. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceiver pins in building automation gateways connected to long outdoor cabling vulnerable to induced lightning surges. IC Role / Device Role / Timing Role: Bidirectional-capable family variant (e.g., 1.5SMC15CA) used here; unidirectional 1.5SMC15A-M3/57T applies where polarity is fixed and ground-referenced. Use Value: Clamps common-mode surges to <22 V while maintaining <1 μA leakage at 12.8 V, ensuring bus idle-state stability and noise immunity. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart washing machines, where MCU GPIOs monitor hall-effect rotor position. IC Role / Device Role / Timing Role: TVS placed across motor terminals and near position sensor supply rails to absorb back-EMF energy before it couples into low-voltage control logic. Use Value: 200 A IFSM rating handles repeated motor startup surges; halogen-free M3 construction satisfies appliance safety certifications (IEC 60335). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A-E3/52 | Same VWM (12.8 V), but SMB package (smaller footprint, higher RθJA = 85 °C/W); lower PPPM = 600 W. | Preferred for space-constrained consumer PCBs where surge energy is limited to IEC 61000-4-2 ±8 kV contact discharge only. | Select when board area is critical and peak surge current remains below 30 A; verify thermal margin with smaller copper pads. |
| 1.5KE15A | Through-hole DO-201 package; identical VBR/VC specs but higher VF and slower response due to larger junction capacitance. | Suitable for legacy industrial power supplies or retrofit designs where automated SMT is unavailable. | Choose only for manual assembly or high-reliability through-hole requirements; avoid in high-speed data lines due to ~100 pF CJ. |
Compared with SMBJ15A-E3/52 and 1.5KE15A, the 1.5SMC15A-M3/57T delivers superior 1500 W surge handling in an SMT-optimized SMC package with halogen-free compliance - making it the preferred choice for new automotive and industrial designs requiring both high energy absorption and RoHS/REACH adherence.
Availability
1.5SMC15A-M3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom line interface applications requiring stable component supply, full traceability, and lifecycle continuity support.
Supply support for 1.5SMC15A-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where compact size, repeatable clamping, and AEC-Q101 readiness are essential.
FAQ
What is the maximum clamping voltage of the 1.5SMC15A-M3/57T under a 10/1000 μs surge?
The 1.5SMC15A-M3/57T has a maximum clamping voltage (VC) of 21.2 V when subjected to its rated peak pulse current of 70.8 A using the standardized 10/1000 μs waveform. This value is measured per Figure 1 and Table on page 2 of Vishay document 88303 and defines the upper voltage limit imposed on protected circuitry during surge events. Engineers use this parameter to verify that downstream components remain within absolute maximum ratings.
Is the 1.5SMC15A-M3/57T halogen-free and RoHS-compliant?
Yes, the 1.5SMC15A-M3/57T carries the "M3" suffix, which explicitly denotes halogen-free, RoHS-compliant construction per Vishay's material categorization standards (document 99912). It contains no brominated flame retardants or chlorine-based compounds, meeting regulatory requirements for environmentally conscious industrial and automotive electronics without sacrificing surge performance or thermal robustness.
Does the 1.5SMC15A-M3/57T have automotive qualification?
The base 1.5SMC15A-M3/57T is commercial-grade; however, the AEC-Q101 qualified variant is designated 1.5SMC15AHM3_A/H (or _A/I), sharing identical electrical specs and SMC packaging. That version undergoes extended stress testing per AEC-Q101 Rev D and is approved for automotive sensor, body control, and infotainment applications - while the M3/57T remains suitable for industrial and telecom use where qualification is not mandated.
How is polarity identified on the 1.5SMC15A-M3/57T?
The 1.5SMC15A-M3/57T is a unidirectional TVS diode, and polarity is marked by a visible cathode band located near one end of the SMC (DO-214AB) package. During PCB layout, the banded end must connect to the line being protected (e.g., signal or supply rail), while the opposite (anode) terminal connects to ground or the lower-potential reference. No marking appears on bidirectional variants like 1.5SMC15CA.
What is the thermal resistance of the 1.5SMC15A-M3/57T, and how does it affect layout?
The 1.5SMC15A-M3/57T 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, as specified in Vishay document 88303. To maintain safe junction temperatures under repetitive surges, designers must replicate this pad area or add thermal vias to inner layers - undersized pads increase RθJA and risk thermal runaway during sustained transient activity.
1.5SMC15A-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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 70.8A
- 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)
1.5SMC15A-M3/57T FAQ
1.How can I place an order for 1.5SMC15A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC15A-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 1.5SMC15A-M3/57T reliable?
The price and inventory of 1.5SMC15A-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 1.5SMC15A-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC15A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC15A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC15A-M3/57T?
1.5SMC15A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC15A-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 1.5SMC15A-M3/57T?
For technical support, including 1.5SMC15A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC15A-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC15A-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC15A-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 1.5SMC15A-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC15A-M3/57T?
All 1.5SMC15A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC15A-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 1.5SMC15A-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC15A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC15A-M3/57T Tags
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