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Vishay General Semiconductor - Diodes Division 1.5SMC27A-M3/9AT
- Part No.:
- 1.5SMC27A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC27A-M3/9AT.pdf
- Description:
- TVS DIODE 23.1VWM 37.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,425
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Product details
Overview
1.5SMC27A-M3/9AT 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 27 V breakdown voltage (VBR = 25.7–28.4 V at 1 mA), 23.1 V stand-off voltage (VWM), clamps to ≤37.5 V at 40 A peak pulse current, and delivers 1500 W peak pulse power with a 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the 1.5SMC27A-M3/9AT datasheet, 1.5SMC27A-M3/9AT pinout, 1.5SMC27A-M3/9AT application, or 1.5SMC27A-M3/9AT equivalent, key selection criteria include its unidirectional polarity, SMC (DO-214AB) package, 150 °C max junction temperature, low incremental surge resistance, and AEC-Q101 qualification eligibility via HM3 suffix variants.
Technical Context
The 1.5SMC27A-M3/9AT operates as a clamping-type TVS diode that enters avalanche conduction when reverse voltage exceeds its breakdown threshold, diverting transient energy away from protected circuitry. Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns), while its low Rdyn minimizes clamping overshoot during high-di/dt events.
Rated for 1500 W peak pulse power under standardized 10/1000 µs waveform conditions, it supports repetitive surges at 0.01 % duty cycle and is mounted on 8.0 mm × 8.0 mm copper pads per terminal. Thermal resistance is 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-leads), enabling reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 25.7 V / 28.4 V at 1 mA - defines precise avalanche onset range for repeatable clamping behavior |
| VWM | 23.1 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | ≤37.5 V at 40 A - clamping voltage under full 1500 W transient, limiting stress on downstream components |
| IPPM | 40 A - peak pulse current capability with 10/1000 µs waveform, defining surge handling capacity |
| PPPM | 1500 W - peak pulse power rating, specifying transient energy absorption limit per event |
| TJ max | +150 °C - maximum junction temperature, supporting operation in under-hood automotive and industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and matte tin-plated leads |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0 flammability rating; terminals are matte tin plated, solderable per J-STD-002 and JESD 22-B102; cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path (unidirectional only) | Connected to lower-potential side of protected line; enables forward-biased operation during fault conditions |
| Cathode | Avalanche conduction node (unidirectional only) | Marked end; connects to higher-potential side; conducts reverse surge current into ground or return path |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables protection against severe lightning-induced transients and inductive switching spikes in 12 V/24 V systems |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage exposure to protected ICs without requiring oversized voltage margins |
| Glass-passivated junction | Ensures long-term stability of leakage current and breakdown voltage across temperature and life cycles |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance mandates for automotive and industrial OEM supply chains |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs and body control modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp transients before they reach LDOs or microcontrollers. Use Value: Withstands 1500 W surges and clamps to 37.5 V, keeping downstream 3.3 V/5 V logic within safe operating area during 12 V system faults. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential or single-ended signal lines to suppress sub-100 ns ESD events without distorting signal integrity. Use Value: Fast <1 ns response and low dynamic impedance ensure minimal disruption to 10–100 kHz sensor signals while absorbing ±8 kV contact ESD per IEC 61000-4-2. |
| DC-DC Converter Input Protection | Telecom Line Card Surge Protection |
|
Use Scenario: Safeguarding buck converter inputs in PoE-powered devices exposed to induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Primary-level TVS on 48 V input rail upstream of filtering and regulation stages. Use Value: 23.1 V VWM allows normal operation across 36–57 V PoE range; 37.5 V clamping prevents overvoltage damage to controller ICs rated for 40 V abs max. |
Use Scenario: Front-end protection for DSL or POTS line interface circuits subjected to lightning surges per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Standoff-rated TVS in series with line transformer or coupled to tip/ring to shunt common-mode surges. Use Value: 1500 W rating meets GR-1089 Class A/B requirements; unidirectional configuration avoids DC bias interference on voice-grade analog lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ27A | Same VBR range (25.7–28.4 V), but lower PPPM = 600 W and SMB (DO-214AA) package (smaller footprint, higher RθJA) | Limited to lighter-duty transients; unsuitable for automotive load dump or telecom lightning standards | Select SMBJ27A only for space-constrained consumer electronics where surge severity is below 600 W |
| 1.5KE27A | Through-hole TO-204AE (DO-41); identical electrical specs but incompatible mounting and thermal profile (RθJA ≈ 50 °C/W) | Requires PCB redesign; not suitable for automated SMT production or high-density layouts | Choose 1.5KE27A only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ27A and 1.5KE27A, the 1.5SMC27A-M3/9AT uniquely balances high-power surge handling (1500 W), SMT manufacturability, and automotive-grade reliability - making it the preferred choice for production-grade 12–48 V systems requiring AEC-Q101-aligned robustness without layout compromise.
Availability
1.5SMC27A-M3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, DC-DC converter inputs, and telecom line card surge protection requiring stable component supply across multi-year production cycles.
Supply support for 1.5SMC27A-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure resilience and AEC-Q101 qualification readiness are critical design requirements.
FAQ
What is the maximum clamping voltage of the 1.5SMC27A-M3/9AT under peak pulse conditions?
The 1.5SMC27A-M3/9AT clamps to a maximum of 37.5 V when subjected to its rated 40 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per standard test conditions and ensures downstream components see limited overvoltage stress during transient events. The clamping voltage is guaranteed across the full operating temperature range and forms the basis for safe margining in protected circuit design.
Is the 1.5SMC27A-M3/9AT AEC-Q101 qualified?
The 1.5SMC27A-M3/9AT itself carries the halogen-free, RoHS-compliant M3 suffix but is not AEC-Q101 qualified. However, Vishay offers the functionally identical 1.5SMC27AHM3_A/9AT variant - same electrical specs and SMC package - which is fully AEC-Q101 qualified for automotive applications. Customers requiring qualification must specify the HM3_A suffix version.
What does the "/9AT" suffix indicate in 1.5SMC27A-M3/9AT?
The "/9AT" suffix denotes packaging: 13-inch diameter plastic tape and reel with 3500 units per reel. This format supports high-volume automated SMT placement and is compatible with standard pick-and-place equipment. It differs from "/57T" (7-inch reel, 850 units) and reflects logistics and production-scale handling requirements for the 1.5SMC27A-M3/9AT.
Can the 1.5SMC27A-M3/9AT be used in bidirectional configurations?
No - the 1.5SMC27A-M3/9AT is strictly unidirectional, as confirmed by its "A" suffix and cathode band marking. For bidirectional operation, Vishay specifies part numbers ending in "CA", such as 1.5SMC27CA-M3/9AT. Using the unidirectional 1.5SMC27A-M3/9AT in AC or symmetrical surge environments risks forward conduction failure and inadequate protection.
What is the thermal resistance of the 1.5SMC27A-M3/9AT, and how does it affect layout?
The 1.5SMC27A-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-leads (RθJL) of 15 °C/W. To maintain reliability under repeated surges, PCB layout must use minimum 8.0 mm × 8.0 mm copper pads per terminal as specified - undersized pads increase thermal impedance and risk exceeding the 150 °C maximum junction temperature during high-duty-cycle events.
1.5SMC27A-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):
- 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-M3/9AT FAQ
1.How can I place an order for 1.5SMC27A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC27A-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 1.5SMC27A-M3/9AT reliable?
The price and inventory of 1.5SMC27A-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 1.5SMC27A-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC27A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC27A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC27A-M3/9AT?
1.5SMC27A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC27A-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 1.5SMC27A-M3/9AT?
For technical support, including 1.5SMC27A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC27A-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC27A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC27A-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 1.5SMC27A-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC27A-M3/9AT?
All 1.5SMC27A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC27A-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 1.5SMC27A-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC27A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC27A-M3/9AT Tags
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