My Inquiry
My Account
Vishay General Semiconductor - Diodes Division 1.5SMC18A-M3/57T
- Part No.:
- 1.5SMC18A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC18A-M3/57T.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,791
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1.5SMC18A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection. It features a 1500 W peak pulse power rating (10/1000 μs), 18 V breakdown voltage (VBR = 17.1–18.9 V at IT = 1.0 mA), and clamps transients to ≤25.2 V at 59.5 A, protecting sensitive ICs and MOSFETs in automotive and industrial power rails.
For engineers reviewing the 1.5SMC18A-M3/57T datasheet, 1.5SMC18A-M3/57T pinout, 1.5SMC18A-M3/57T application, or 1.5SMC18A-M3/57T equivalent, this device delivers verified clamping performance, halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness-critical for ESD and lightning-induced transient suppression in DC power inputs and signal line interfaces.
Technical Context
The 1.5SMC18A-M3/57T operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to voltage transients and low incremental surge resistance. Its 1500 W peak pulse power rating is specified under standardized 10/1000 μs waveform conditions with 0.01% duty cycle, and thermal derating follows J-STD-020 MSL level 1 (260 °C peak reflow).
It exhibits a maximum reverse leakage current of 1.0 μA at 15.3 V stand-off voltage (VWM), a clamping voltage of 25.2 V at 59.5 A peak pulse current (IPPM), and a temperature coefficient of VBR of +0.089 %/°C-enabling stable overvoltage protection across -65 °C to +150 °C operating junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at 1.0 mA test current - defines precise avalanche onset for reliable triggering |
| VWM | 15.3 V - maximum continuous reverse voltage before significant leakage begins |
| VC @ IPPM | 25.2 V at 59.5 A - clamped voltage during 1500 W surge, limiting stress on downstream components |
| PPPM | 1500 W (10/1000 μs) - peak transient energy handling capacity for lightning and inductive switching events |
| IFSM | 200 A (8.3 ms half-sine) - surge current withstand capability for unidirectional forward conduction |
| TJ max | +150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal design |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL level 1 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection in unidirectional configuration | Connected to protected line; conducts when transient exceeds VBR, shunting current to ground |
| Anode | Low-side reference terminal | Typically tied to system ground or common return path; completes clamping loop during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) without derating |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets automotive and industrial environmental compliance requirements without compromising thermal performance |
| AEC-Q101 qualification option | Supports automotive-grade deployment with validated reliability testing (via HM3 suffix variants) |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD, relay bounce) |
Applications
| Automotive Power Input Protection | Industrial DC Power Rail Clamping |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp spikes above 25 V. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to ≤25.2 V during 100 V/50 ms load dump events. |
Use Scenario: Safeguarding PLC I/O modules against inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Standoff-connected TVS on 24 V supply line, triggered only during >18 V transients. Use Value: Absorbs up to 1500 W surge energy without failure, preserving signal integrity and preventing latch-up in interface ICs. |
| Consumer Equipment AC/DC Adapter Output | Telecom Interface Line Protection |
Use Scenario: Secondary-side surge suppression on 19 V laptop adapter outputs exposed to user-handling ESD. IC Role / Device Role / Timing Role: Unidirectional clamping device between VOUT and GND, with cathode to output rail. Use Value: Responds in <1 ns to ±8 kV contact ESD (IEC 61000-4-2), holding output below 25.2 V during discharge. |
Use Scenario: Protecting RS-485 transceivers on outdoor telecom node interfaces subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on differential bus lines referenced to local ground plane. Use Value: Clamps common-mode transients to ≤25.2 V while maintaining signal margin for 1.5 V logic-compatible receivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Lower PPPM (600 W), same VBR range, SMB package (smaller footprint, higher RθJA) | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); not suitable for ISO 7637-2 load dump | Select when board space is constrained and surge energy is ≤600 W; verify thermal margin with 120 °C TJ derating. |
| 1.5KE18A | Through-hole TO-204AA (DO-41), identical electrical specs but no MSL 1 or AEC-Q101 support | Not suitable for automated SMT assembly; requires wave solder or hand-solder; lacks automotive qualification path | Choose only for legacy through-hole designs or prototyping where reflow compatibility and automotive compliance are not required. |
Compared with SMBJ18A and 1.5KE18A, the 1.5SMC18A-M3/57T uniquely combines 1500 W surge capability, SMC surface-mount compatibility, halogen-free construction, and AEC-Q101 qualification readiness-making it the preferred choice for production-grade automotive and industrial SMT power rail protection.
Availability
1.5SMC18A-M3/57T is available at Aetrix Electronics and suitable for automotive ECU power inputs, industrial PLC DC rails, consumer adapter outputs, and telecom RS-485 interfaces requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for 1.5SMC18A-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, power efficiency, and automotive-grade validation.
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 rating, and process compatibility are critical.
FAQ
What is the clamping voltage of the 1.5SMC18A-M3/57T at its rated peak pulse current?
The 1.5SMC18A-M3/57T clamps to a maximum of 25.2 V at its rated peak pulse current of 59.5 A (10/1000 μs waveform). This value is measured under standardized test conditions with 0.31" × 0.31" copper pads and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The 1.5SMC18A-M3/57T maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC18A-M3/57T suitable for automotive applications?
Yes-the 1.5SMC18A-M3/57T is halogen-free and RoHS-compliant (M3 suffix), and its base series is AEC-Q101 qualified when ordered with HM3 suffix (e.g., 1.5SMC18AHM3_A/H). While the 1.5SMC18A-M3/57T itself is commercial-grade, it shares identical electrical and thermal characteristics with qualified variants and is widely deployed in automotive infotainment, body control, and sensor modules where qualification documentation is managed at program level. The 1.5SMC18A-M3/57T meets MSL level 1 reflow requirements.
What does the "/57T" suffix indicate in 1.5SMC18A-M3/57T?
The "/57T" suffix denotes packaging: 7-inch diameter plastic tape-and-reel with 850 units per reel. This format is optimized for high-speed SMT placement equipment and supports automated manufacturing workflows. The "M3" prefix confirms halogen-free, RoHS-compliant construction, while "18A" specifies the 18 V nominal breakdown variant within the 1.5SMC family. The 1.5SMC18A-M3/57T is not bidirectional-its cathode band identifies polarity for unidirectional operation.
How does the 1.5SMC18A-M3/57T compare to bidirectional TVS diodes like 1.5SMC18CA?
The 1.5SMC18A-M3/57T is unidirectional and intended for DC line protection where polarity is fixed (e.g., +12 V rail to ground), offering tighter VBR tolerance and lower leakage at VWM. In contrast, 1.5SMC18CA is bidirectional and suited for AC or floating signal lines (e.g., RS-485 differential pairs), with symmetrical clamping in both directions but higher VWM (15.3 V vs. 12.8 V for CA version). The 1.5SMC18A-M3/57T cannot replace 1.5SMC18CA in AC-coupled applications without circuit redesign.
What thermal derating applies to the 1.5SMC18A-M3/57T above 25 °C ambient?
The 1.5SMC18A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W on standard 0.31" × 0.31" copper pads. Its power dissipation (PD) derates linearly above 25 °C: at 50 °C ambient, PD drops to 6.5 W; at 100 °C, it falls to ~2.2 W. Peak pulse power (PPPM) also derates per Figure 2 in the datasheet-e.g., at TJ = 125 °C, PPPM is reduced to ~70% of 1500 W. The 1.5SMC18A-M3/57T must be mounted per recommended pad layout to achieve published ratings.
1.5SMC18A-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):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- 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)
1.5SMC18A-M3/57T FAQ
1.How can I place an order for 1.5SMC18A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC18A-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 1.5SMC18A-M3/57T reliable?
The price and inventory of 1.5SMC18A-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 1.5SMC18A-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC18A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC18A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC18A-M3/57T?
1.5SMC18A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC18A-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 1.5SMC18A-M3/57T?
For technical support, including 1.5SMC18A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC18A-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC18A-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC18A-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 1.5SMC18A-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC18A-M3/57T?
All 1.5SMC18A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC18A-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 1.5SMC18A-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC18A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC18A-M3/57T Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
