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Vishay General Semiconductor - Diodes Division 1.5SMC540A-M3/57T
- Part No.:
- 1.5SMC540A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC540A-M3/57T.pdf
- Description:
- TVS DIODE 459VWM 740VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,398
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Product details
Overview
1.5SMC540A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, rated for 540 V breakdown voltage (VBR = 513–567 V at IT = 1.0 mA), 740 V maximum clamping voltage (VC) at 2.03 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform). It protects high-voltage DC rails in industrial power supplies and telecom rectifier modules against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5SMC540A-M3/57T datasheet, 1.5SMC540A-M3/57T pinout, 1.5SMC540A-M3/57T application, or 1.5SMC540A-M3/57T equivalent, this page delivers verified electrical parameters, polarity marking guidance, thermal resistance data (RθJA = 75 °C/W), halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification status for automotive-grade deployment.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped crowbar device: under normal bias it presents high impedance (>1 µA leakage at VWM = 459 V), then rapidly transitions to low-impedance conduction when transient voltage exceeds its 513–567 V breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance.
Designed for 10/1000 µs double-exponential surge waveforms, the 1.5SMC540A-M3/57T delivers 1500 W peak pulse power with 0.01% duty cycle, derated linearly above TA = 25 °C per Fig. 2. The cathode band marking enables unambiguous PCB orientation during automated placement on 8.0 mm × 8.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 513 V / 567 V at IT = 1.0 mA - defines precise overvoltage trip window for reliable protection of 400–480 V DC systems |
| VWM | 459 V - maximum continuous reverse operating voltage; sets safe margin below VBR min for system stability |
| VC @ IPPM | 740 V at 2.03 A - clamping voltage during 10/1000 µs surge; determines protected circuit's peak stress level |
| PPPM | 1500 W - peak pulse power handling capacity; validates suitability for IEC 61000-4-5 Level 4 (4 kV) surge testing |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance; informs heatsinking requirements for sustained surge duty |
| TJ max | +150 °C - maximum junction temperature; supports operation in enclosed industrial enclosures without forced cooling |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.13 mm × 6.22 mm footprint and 3.20 mm height for automated assembly |
Pinout & Package
The 1.5SMC540A-M3/57T uses the SMC (DO-214AB) package: a rectangular, low-profile surface-mount case with two coplanar leads. Polarity is marked by a cathode band on the body; the banded end is the cathode (K), the opposite end is the anode (A). No marking appears on bidirectional variants, but this part is unidirectional.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Positive terminal for forward conduction path | Connected to system ground or low-side return; completes clamping loop during transient events |
| Cathode (K) | Negative terminal; marked by band on package | Connected to protected line (e.g., +48 V telecom rail); reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 surge levels up to 4 kV in 2 Ω source impedance systems |
| Glass passivated chip junction | Ensures long-term VBR stability and low leakage drift across 1000+ surge cycles at rated stress |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and EU Directive 2015/863 for restricted substances |
| AEC-Q101 qualified (B revision) | Validated for automotive under-hood applications including DC-DC converter inputs and battery management systems |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and reflow at 260 °C peak without preconditioning-ideal for high-mix manufacturing |
Applications
| Telecom Power Rectification | Industrial HV DC Bus Protection |
|---|---|
Use Scenario: Protecting output stages of -48 V telecom rectifiers against lightning-induced common-mode surges on AC input lines. IC Role / Device Role / Timing Role: Unidirectional TVS placed between rectified DC output and chassis ground to clamp transients before they reach downstream DC-DC converters. Use Value: Clamps 4 kV surges to ≤740 V within nanoseconds, preserving reliability of 100 V-rated MOSFETs and optocouplers in secondary-side regulation circuits. |
Use Scenario: Safeguarding 400–600 V DC links in variable-frequency drives and solar inverters from IGBT switching spikes and grid faults. IC Role / Device Role / Timing Role: High-voltage standoff TVS mounted directly across DC bus capacitors to absorb repetitive 1500 W pulses without degradation. Use Value: Maintains <1 µA leakage at 459 V, minimizing standby power loss while surviving >1000 surges at full rating per JESD22-A114E. |
| Automotive Battery Management | High-Voltage Sensor Signal Conditioning |
Use Scenario: Overvoltage protection on 12 V/48 V dual-battery system monitoring circuits exposed to load-dump transients (SAE J1113-11). IC Role / Device Role / Timing Role: Unidirectional suppressor connected between sensor supply rail and ground, triggered only during positive-going transients exceeding 513 V. Use Value: AEC-Q101 qualification ensures operation at -40 °C to +150 °C junction temperature with no parameter shift after 1000 thermal cycles. |
Use Scenario: Shielding isolated analog front-ends in HV battery cell monitors from ESD and fast transients coupled via isolation barriers. IC Role / Device Role / Timing Role: Standoff protector on high-impedance voltage divider inputs to prevent latch-up in precision ADCs during ±8 kV contact ESD events. Use Value: 75 °C/W RθJA allows direct mounting on FR4 without thermal vias, reducing BOM count versus discrete heatsink solutions. |
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 | Same VBR range (513–567 V) but lower PPPM = 600 W; SMB package (smaller footprint, higher RθJA = 110 °C/W) | Limited to lower-energy surges (IEC 61000-4-5 Level 2); unsuitable for 4 kV line-to-ground tests | Select when space-constrained layouts preclude SMC and surge energy is capped at 100 mJ |
| 1.5KE540A | Same electrical specs but axial-leaded DO-201AD package; higher mechanical robustness but incompatible with SMT assembly | Requires through-hole rework or hybrid assembly; not viable for fully automated production | Choose only for legacy repair, prototyping, or non-SMT environments where manual soldering is acceptable |
Compared with SMBJ540A and 1.5KE540A, the 1.5SMC540A-M3/57T uniquely balances 1500 W surge capability, SMT compatibility, halogen-free compliance, and AEC-Q101 qualification-making it the sole option for high-reliability, high-volume automotive and telecom applications requiring all four attributes simultaneously.
Availability
1.5SMC540A-M3/57T is available at Aetrix Electronics and suitable for telecom rectifier modules, industrial HV DC bus protection, and automotive battery management systems requiring stable component supply, long-lifecycle support, and traceable halogen-free sourcing.
Supply support for 1.5SMC540A-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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-power, and automotive-qualified components.
The 1.5SMC Series was developed specifically for surface-mount transient suppression in high-voltage power conversion and industrial control systems, prioritizing surge robustness, thermal stability, and automated manufacturability.
FAQ
What is the maximum clamping voltage of the 1.5SMC540A-M3/57T under a 10/1000 µs surge?
The 1.5SMC540A-M3/57T has a maximum clamping voltage (VC) of 740 V when subjected to its rated peak pulse current of 2.03 A under a 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88303 and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5SMC540A-M3/57T maintains this clamping performance across its full operating temperature range of -65 °C to +150 °C.
Is the 1.5SMC540A-M3/57T suitable for automotive applications?
Yes-the 1.5SMC540A-M3/57T carries AEC-Q101 qualification (revision B, per ordering information table), confirming validation for automotive use including under-hood environments. Its 150 °C maximum junction temperature, MSL Level 1 moisture sensitivity, and halogen-free M3 construction meet stringent automotive reliability and compliance requirements. The 1.5SMC540A-M3/57T is explicitly recommended for battery management and DC-DC converter protection in vehicles.
How does the M3 suffix differ from E3 in the 1.5SMC540A-M3/57T part number?
The M3 suffix indicates halogen-free, RoHS-compliant construction meeting IPC-1752A material declarations, whereas E3 denotes standard RoHS compliance without halogen-free assurance. Both meet JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1, but only M3 satisfies strict halogen restrictions (Cl ≤ 900 ppm, Br ≤ 900 ppm) required by Tier 1 automotive and green electronics standards. The 1.5SMC540A-M3/57T thus supports sustainability mandates where E3 would not suffice.
What is the thermal resistance of the 1.5SMC540A-M3/57T, and how does it affect layout?
The 1.5SMC540A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 8.0 mm × 8.0 mm copper pads per terminal. This value assumes no additional thermal vias or heatsinking. For continuous power dissipation near its 6.5 W rating, designers must ensure adequate copper area and airflow; however, for transient-only operation (e.g., surge suppression), thermal mass dominates over steady-state resistance. Layout must respect the SMC (DO-214AB) pad dimensions shown in Figure 6 of document 88303 to maintain this RθJA.
Does the 1.5SMC540A-M3/57T have polarity marking, and how is it oriented on PCB?
Yes-the 1.5SMC540A-M3/57T is unidirectional and features a visible cathode band on the package body. During PCB layout, the banded end must be connected to the line being protected (e.g., +48 V telecom rail), while the unbanded end connects to ground or return. This orientation ensures reverse-bias operation under normal conditions and rapid avalanche conduction during overvoltage events. Incorrect polarity results in forward conduction and catastrophic failure. The 1.5SMC540A-M3/57T datasheet specifies this in the "Polarity" section on page 1.
1.5SMC540A-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):
- 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-M3/57T FAQ
1.How can I place an order for 1.5SMC540A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC540A-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 1.5SMC540A-M3/57T reliable?
The price and inventory of 1.5SMC540A-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 1.5SMC540A-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC540A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC540A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC540A-M3/57T?
1.5SMC540A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC540A-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 1.5SMC540A-M3/57T?
For technical support, including 1.5SMC540A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC540A-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC540A-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC540A-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 1.5SMC540A-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC540A-M3/57T?
All 1.5SMC540A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC540A-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 1.5SMC540A-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC540A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC540A-M3/57T Tags
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