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Vishay General Semiconductor - Diodes Division 1.5SMC540A-M3/9AT
- Part No.:
- 1.5SMC540A-M3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC540A-M3/9AT.pdf
- Description:
- TVS DIODE 459VWM 740VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,427
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Product details
Overview
1.5SMC540A-M3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in power rails and signal lines. It delivers 1500 W peak pulse power (10/1000 μs), clamps at 740 V under 2.03 A peak pulse current, and features a 513–567 V breakdown voltage (VBR) at 1 mA test current. Used to protect MOSFETs, DC-DC converters, and industrial power supplies against lightning-induced transients and inductive switching spikes.
For engineers reviewing the 1.5SMC540A-M3/9AT datasheet, 1.5SMC540A-M3/9AT pinout, 1.5SMC540A-M3/9AT application, or 1.5SMC540A-M3/9AT equivalent, this device offers verified unidirectional clamping performance, SMC (DO-214AB) surface-mount compatibility, AEC-Q101 qualification readiness (via HM3 suffix variants), and halogen-free RoHS compliance - critical for automotive-grade power rail hardening and long-lifecycle industrial designs.
Technical Context
This TVS operates as a silicon avalanche diode with glass-passivated junction, enabling fast response (<1 ns) and low incremental surge resistance. Its unidirectional polarity uses cathode-band marking and exhibits 459 V maximum stand-off voltage (VWM) and 740 V maximum clamping voltage (VC) at IPPM = 2.03 A.
Thermally, it supports operation from −65 °C to +150 °C junction temperature, with RθJA = 75 °C/W and RθJL = 15 °C/W. It meets J-STD-020 MSL Level 1 (260 °C peak reflow) and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 513 V / 567 V at 1 mA - defines reliable avalanche initiation threshold for overvoltage detection |
| VWM | 459 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | 740 V at 2.03 A - clamping voltage during 10/1000 μs surge, limiting downstream voltage stress |
| PPPM | 1500 W - peak pulse power handling capability per standard 10/1000 μs waveform |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine), relevant for fault-current limiting |
| TJ max | +150 °C - maximum junction temperature, supporting high-ambient industrial and automotive under-hood use |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount package with 8.0 mm × 8.0 mm copper pad thermal design |
Pinout & Package
Package: SMC (DO-214AB), molded epoxy case meeting UL 94 V-0 flammability rating; matte tin-plated leads solderable per J-STD-002 and JESD22-B102; cathode indicated by band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 48 V bus); conducts during overvoltage to shunt surge to ground |
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) on high-voltage DC rails |
| Glass-passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and industrial OEM supply chains |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
| AEC-Q101 qualified variants available | HM3 suffix versions are qualified for automotive power electronics applications per stress-test standards |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of IGBT gate drivers and DC-link capacitors against switching transients and load dump events in 400–600 V drives. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed across DC bus or gate resistor network to limit voltage overshoot. Use Value: Clamps 740 V at 2.03 A, preventing gate oxide rupture in 650 V IGBTs and sustaining >100,000 surge cycles per IEC 61000-4-5. |
Use Scenario: Input-stage surge suppression on −48 V telecom rectifier outputs exposed to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC distribution, coordinated with upstream MOVs. Use Value: Withstands 1500 W pulses while maintaining <1 μA leakage at 459 V, minimizing standby power loss in always-on systems. |
| Automotive DC-DC Converters | Renewable Energy Inverters |
Use Scenario: Transient protection on 12–48 V input rails of bidirectional DC-DC modules in EV battery management subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input filter and controller IC to absorb load-dump energy. Use Value: Qualified HM3 variants support AEC-Q101 stress testing; 200 A IFSM rating handles ISO 7637-2 Pulse 5a/b energy bursts. |
Use Scenario: Overvoltage clamping on PV string combiner box inputs subject to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: High-VWM TVS used in parallel with string fusing to limit voltage rise during arc-fault events. Use Value: 459 V VWM allows safe operation up to 1000 V DC PV systems; 75 °C/W RθJA enables derating for outdoor enclosure ambient up to 85 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ540A | Lower PPPM (600 W), same VBR range (513–567 V), SMB package (smaller footprint, higher RθJA) | Not suitable for 1500 W surge events; limited to lower-energy IEC 61000-4-5 Level 2/3 | Select when board space is constrained and surge threat level is ≤600 W; verify thermal margin with RθJA = 110 °C/W |
| 1.5KE540A | Same electrical specs but axial-leaded DO-201AD package; no SMT compatibility; higher mounting inductance | Requires through-hole assembly; unsuitable for automated high-volume SMT lines or vibration-prone environments | Choose only for legacy repair, prototyping, or low-volume applications where reflow compatibility is not required |
Compared with SMBJ540A and 1.5KE540A, the 1.5SMC540A-M3/9AT uniquely combines 1500 W surge capacity, SMC surface-mount reliability, halogen-free compliance, and scalable AEC-Q101 qualification path - making it the preferred choice for production-grade high-voltage industrial and automotive power protection.
Availability
1.5SMC540A-M3/9AT is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive DC-DC converters, and renewable energy inverters requiring stable component supply, long-lifecycle assurance, and halogen-free RoHS compliance.
Supply support for 1.5SMC540A-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, power efficiency, and automotive-grade qualification.
The 1.5SMC Series was engineered for high-power transient suppression in harsh-environment applications - delivering consistent clamping performance across wide temperature ranges and supporting both commercial and AEC-Q101 automotive deployment.
FAQ
What is the maximum clamping voltage of the 1.5SMC540A-M3/9AT under rated surge conditions?
The 1.5SMC540A-M3/9AT has a maximum clamping voltage (VC) of 740 V at 2.03 A peak pulse current (IPPM) using the standard 10/1000 μs waveform. This value is measured per Figure 1 in Vishay Document 88303 and ensures predictable voltage limiting during surge events without exceeding safe stress limits for downstream 600 V-rated components.
Is the 1.5SMC540A-M3/9AT suitable for automotive applications?
The 1.5SMC540A-M3/9AT itself is halogen-free and RoHS-compliant but not AEC-Q101 qualified. However, its HM3-suffix variant (e.g., 1.5SMC540AHM3_B/I) is AEC-Q101 qualified for automotive use. Engineers selecting 1.5SMC540A-M3/9AT for automotive designs must specify the HM3 version and confirm qualification status via Vishay's official documentation.
What does the "M3" suffix indicate in 1.5SMC540A-M3/9AT?
The "M3" suffix in 1.5SMC540A-M3/9AT denotes halogen-free, RoHS-compliant construction per Vishay's material categorization standard. It confirms compliance with JEDEC JS709E and IPC-1752A requirements, distinguishing it from E3 (RoHS-compliant but not halogen-free) and HM3 (halogen-free + AEC-Q101 qualified) variants.
Can the 1.5SMC540A-M3/9AT be used in bidirectional configurations?
No - the 1.5SMC540A-M3/9AT is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. For bidirectional operation, Vishay specifies the "CA" suffix (e.g., 1.5SMC540CA). Using 1.5SMC540A-M3/9AT in reverse-biased AC applications risks catastrophic failure due to lack of symmetrical avalanche capability.
What is the thermal resistance from junction to ambient for the 1.5SMC540A-M3/9AT?
The 1.5SMC540A-M3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes still air conditions and is critical for calculating safe power derating above 25 °C ambient temperature.
1.5SMC540A-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):
- 459V
- Voltage - Breakdown (Min):
- 513V
- Voltage - Clamping (Max) @ Ipp:
- 740V
- Current - Peak Pulse (10/1000µs):
- 2.03A
- 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)
1.5SMC540A-M3/9AT FAQ
1.How can I place an order for 1.5SMC540A-M3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC540A-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 1.5SMC540A-M3/9AT reliable?
The price and inventory of 1.5SMC540A-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 1.5SMC540A-M3/9AT is usually 5 days.
3.What payment methods are accepted for 1.5SMC540A-M3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC540A-M3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC540A-M3/9AT?
1.5SMC540A-M3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC540A-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 1.5SMC540A-M3/9AT?
For technical support, including 1.5SMC540A-M3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC540A-M3/9AT requirements.
6.How does Aetrix verify that 1.5SMC540A-M3/9AT is sourced from the original manufacturer or authorized distributors?
All 1.5SMC540A-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 1.5SMC540A-M3/9AT meets industry standards.
7.What is the process for return or replacement of 1.5SMC540A-M3/9AT?
All 1.5SMC540A-M3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC540A-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 1.5SMC540A-M3/9AT part is unused and in its original packaging.
Return procedure for 1.5SMC540A-M3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC540A-M3/9AT Tags
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