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Vishay General Semiconductor - Diodes Division 1.5SMC27A-M3/57T
- Part No.:
- 1.5SMC27A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27A-M3/57T.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,067
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Product details
Overview
1.5SMC27A-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 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), clamps transients to ≤37.5 V at 40 A peak pulse current (10/1000 µs), and delivers 1500 W peak pulse power. It is widely deployed in automotive sensor signal lines and industrial I/O interfaces to suppress ESD and lightning-induced surges.
For engineers reviewing the 1.5SMC27A-M3/57T datasheet, 1.5SMC27A-M3/57T pinout, 1.5SMC27A-M3/57T application, or 1.5SMC27A-M3/57T equivalent, key selection criteria include its unidirectional polarity, 23.1 V stand-off voltage (VWM), <1 µA reverse leakage at VWM, 150 °C max junction temperature, and halogen-free RoHS-compliant M3 suffix construction.
Technical Context
The 1.5SMC27A-M3/57T operates as a silicon avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to transient events and low incremental surge resistance. Its clamping behavior is defined by a well-controlled breakdown knee and stable thermal derating above 25 °C, supported by RθJA = 75 °C/W and RθJL = 15 °C/W.
It is rated for non-repetitive 10/1000 µs waveform pulses up to 1500 W, with peak pulse current IPPM = 40.0 A and maximum clamping voltage VC = 37.5 V. The device meets J-STD-020 MSL Level 1 and is qualified to AEC-Q101 when ordered with HE3/HM3 suffixes - though the -M3/57T variant is commercial-grade, halogen-free, and RoHS-compliant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines reliable avalanche initiation threshold under DC bias |
| VWM | 23.1 V - maximum continuous reverse operating voltage before significant leakage |
| IPPM | 40.0 A (10/1000 µs) - peak surge current it safely shunts without failure |
| VC | ≤37.5 V at IPPM - clamped voltage protecting downstream ICs from overvoltage stress |
| PPPM | 1500 W - transient energy absorption capacity per single pulse |
| ID @ VWM | ≤1.0 µA - ultra-low leakage ensures minimal standby power loss and signal integrity |
| TJ max | +150 °C - enables operation in under-hood automotive and high-temperature industrial environments |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward conduction | Connected to ground or lower-potential rail in unidirectional TVS configuration |
| Cathode | Current exit terminal; marked with band | Connected to protected line (e.g., CAN_H, RS-485 A/B, sensor output) to clamp positive transients |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables robust suppression of severe lightning-induced surges in industrial fieldbus lines |
| Glass-passivated chip junction | Ensures long-term reliability and stable VBR performance across temperature and life cycles |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture-related popcorning risk |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for global industrial and automotive supply chains |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD > 15 kV) |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature (ECT) and manifold absolute pressure (MAP) sensors from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and ground to clamp positive voltage spikes. Use Value: Prevents sensor IC latch-up or damage from 12 V system transients exceeding 40 V, leveraging VC ≤ 37.5 V at 40 A. |
Use Scenario: Safeguarding differential data lines (A/B) of RS-485 transceivers in factory automation PLCs exposed to motor drive noise and ground bounce. IC Role / Device Role / Timing Role: One 1.5SMC27A-M3/57T per line (A-to-GND, B-to-GND) for common-mode surge suppression. Use Value: Maintains signal integrity under 1 kV/µs fast transients due to sub-nanosecond response and low capacitance (~100 pF at 0 V). |
| Consumer Power Adapter Input | Telecom DSL Line Protection |
Use Scenario: Secondary-side overvoltage protection on +5 V or +12 V rails of AC/DC adapters against capacitor discharge and regulator fault conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between regulated output and ground to limit fault voltage excursion. Use Value: Clamps output to ≤37.5 V during overvoltage events, preventing damage to downstream USB controllers or microcontrollers. |
Use Scenario: Front-end protection of ADSL/VDSL line interface circuits against induced surges from nearby power lines or lightning coupling. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per tip/ring) referenced to telecom ground plane. Use Value: Withstands repeated 10/1000 µs surges up to 1500 W while maintaining VWM = 23.1 V to avoid interference with normal DSL signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27A | Same VBR range (25.7–28.4 V), but SMB package (DO-214AA); lower PPPM = 600 W | Lower power handling limits use to lighter-duty consumer or low-energy I/O lines | Select when board space is constrained and surge threat level is moderate (e.g., USB ports, GPIOs) |
| 1.5KE27A | Through-hole DO-201 package; identical electrical specs but higher RθJA (~100 °C/W) and no MSL Level 1 rating | Not suitable for automated SMT production; requires wave soldering or hand assembly | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ27A and 1.5KE27A, the 1.5SMC27A-M3/57T offers superior surge robustness (1500 W vs. 600 W or 1500 W with inferior thermal performance), full SMT process support, and halogen-free compliance - making it optimal for high-reliability automotive and industrial surface-mount systems.
Availability
1.5SMC27A-M3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 networks, and telecom line interface cards requiring stable component supply, halogen-free compliance, and repeatable surge immunity performance.
Supply support for 1.5SMC27A-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was engineered for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where compact size, high surge capability, and process compatibility are critical.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC27A-M3/57T?
The 1.5SMC27A-M3/57T has a specified breakdown voltage (VBR) range of 25.7 V to 28.4 V at 1 mA test current, representing ±5% tolerance around the nominal 27 V rating. This tight distribution ensures consistent clamping behavior across production lots and supports reliable design margining in overvoltage protection circuits.
Is the 1.5SMC27A-M3/57T suitable for automotive applications?
The 1.5SMC27A-M3/57T is halogen-free and RoHS-compliant but is not AEC-Q101 qualified in this M3/57T configuration. For automotive use, Vishay offers the HM3_A variant (e.g., 1.5SMC27AHM3_A/H); the 1.5SMC27A-M3/57T is approved for commercial and industrial applications including under-dash modules where full qualification is not mandated.
What is the maximum clamping voltage of the 1.5SMC27A-M3/57T at rated peak pulse current?
The 1.5SMC27A-M3/57T exhibits a maximum clamping voltage (VC) of 37.5 V when subjected to its rated 40.0 A peak pulse current (10/1000 µs waveform). This value is guaranteed across temperature and ensures downstream components see limited overvoltage stress during transient events.
Does the 1.5SMC27A-M3/57T have polarity marking, and how is it oriented in circuit?
Yes - the 1.5SMC27A-M3/57T is unidirectional and features a cathode band marking on the SMC package body. In circuit, the banded end connects to the protected line (e.g., signal trace), while the anode connects to ground, enabling clamping of positive-going transients above VWM = 23.1 V.
What is the thermal resistance and power derating behavior of the 1.5SMC27A-M3/57T?
The 1.5SMC27A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W on standard 8 mm × 8 mm copper pads. Its peak pulse power must be derated linearly above 25 °C ambient, reaching ~50% of 1500 W at 100 °C case temperature - detailed in Figure 2 of the Vishay datasheet 88303.
1.5SMC27A-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):
- 23.1V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- Current - Peak Pulse (10/1000µs):
- 40A
- 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)
1.5SMC27A-M3/57T FAQ
1.How can I place an order for 1.5SMC27A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27A-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 1.5SMC27A-M3/57T reliable?
The price and inventory of 1.5SMC27A-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 1.5SMC27A-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC27A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27A-M3/57T?
1.5SMC27A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27A-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 1.5SMC27A-M3/57T?
For technical support, including 1.5SMC27A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27A-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC27A-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27A-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 1.5SMC27A-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC27A-M3/57T?
All 1.5SMC27A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27A-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 1.5SMC27A-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC27A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27A-M3/57T Tags
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