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Vishay General Semiconductor - Diodes Division 1.5SMC540AHM3_B/I
- Part No.:
- 1.5SMC540AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC540AHM3_B/I.pdf
- Description:
- TVS DIODE 459VWM 740VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,010
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Product details
Overview
1.5SMC540AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 540 V breakdown voltage (VBR min = 513 V, max = 567 V), 1500 W peak pulse power rating (10/1000 µs), and clamps transients to ≤740 V at 2.03 A peak pulse current - suitable for protecting automotive ECUs, industrial power supplies, and telecom line interfaces against lightning-induced surges.
For engineers reviewing the 1.5SMC540AHM3_B/I datasheet, 1.5SMC540AHM3_B/I pinout, 1.5SMC540AHM3_B/I application, or 1.5SMC540AHM3_B/I equivalent, key selection criteria include its AEC-Q101 qualification, SMC (DO-214AB) package with cathode band polarity marking, 459 V stand-off voltage (VWM), <1 µA reverse leakage at VWM, and thermal resistance of 75 °C/W (junction-to-ambient).
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging an avalanche breakdown mechanism to divert transient energy away from sensitive downstream circuitry. Its glass-passivated junction ensures stable performance under repetitive surge stress, while the low incremental surge resistance enables rapid voltage clamping during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a).
The 1.5SMC540AHM3_B/I is rated for operation from –65 °C to +150 °C junction temperature and meets J-STD-020 MSL Level 1 (peak reflow ≤260 °C). Its halogen-free, RoHS-compliant construction and AEC-Q101 qualification confirm suitability for automotive-grade applications requiring long-term reliability under thermal cycling and mechanical vibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 513 V / 567 V at 1.0 mA test current - defines reliable avalanche onset range for consistent clamping behavior across production lots |
| VWM | 459 V - maximum continuous reverse operating voltage before significant leakage; sets safe DC bias margin for 400 V nominal systems |
| VC @ IPPM | ≤740 V at 2.03 A - clamping voltage under 1500 W 10/1000 µs surge; determines protected circuit's maximum transient exposure level |
| IPPM | 2.03 A - peak pulse current capability under standardized waveform; directly correlates with surge immunity per IEC 61000-4-5 Level 4 |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform at 0.01% duty cycle; supports repeated surge events in industrial environments |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive locations without derating below 125 °C ambient |
| RθJA | 75 °C/W - thermal resistance junction-to-ambient on standard 8 mm × 8 mm copper pads; informs heatsinking requirements for sustained power dissipation |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant; cathode indicated by molded band on body; terminals are matte tin-plated for J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward conduction mode | Connected to system ground or lower-potential rail when used in unidirectional configuration |
| Cathode | Current exit terminal in forward conduction mode; marked with band | Connected to protected line (e.g., 48 V bus, CAN_H); conducts surge current toward ground during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT - enables direct use in ECU, ADAS, and body control modules |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 4 kV surge (line-earth) without degradation when mounted per recommended pad layout |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA at VWM) over 15+ year field life in humid or thermally cycled environments |
| Low profile SMC package | Height ≤2.62 mm enables placement in space-constrained PCB layouts (e.g., motor drive inverters, battery management systems) |
| MSL Level 1 rating | Allows single-reflow assembly without dry-pack or baking - reduces manufacturing cost and process complexity |
Applications
| Automotive Power Rail Protection | Industrial 48 V DC Distribution |
|---|---|
Use Scenario: Protecting 48 V battery-fed control units (e.g., HVAC actuators, seat motors) from load dump and alternator transients per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 48 V rail and chassis ground to clamp spikes up to ±120 V. Use Value: Clamps to ≤740 V at 2.03 A, ensuring downstream DC-DC converters and microcontrollers remain within absolute maximum ratings. |
Use Scenario: Safeguarding programmable logic controllers (PLCs) and I/O modules connected to 48 V field wiring exposed to inductive switching noise. IC Role / Device Role / Timing Role: Standoff-rated TVS on input power terminals to absorb repetitive 10/1000 µs surges from relay coils and solenoids. Use Value: 1500 W rating and 75 °C/W RθJA support >100,000 surge cycles without parameter shift in factory automation environments. |
| Telecom Line Interface Protection | Renewable Energy Inverter DC Link |
Use Scenario: Shielding RS-485 transceivers and Ethernet PHYs in outdoor base stations from lightning-induced common-mode surges on data lines. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (anode-to-ground, cathode-to-line) forming low-capacitance, high-power front-end clamp. Use Value: 459 V VWM allows operation on 380 V DC bias rails while maintaining <1 µA leakage - minimizing standby power loss. |
Use Scenario: Protecting IGBT gate drivers and sensing circuits in solar string inverters subjected to DC link voltage overshoot during rapid MPPT transitions. IC Role / Device Role / Timing Role: High-VBR TVS on DC link monitoring nodes to prevent false triggering or damage during 600 V+ transients. Use Value: 513–567 V VBR range ensures precise coordination with 600 V-class IGBT blocking voltage, avoiding premature conduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ540A | Same VBR range (513–567 V) but SMB package (DO-214AA); 600 W PPPM, higher RθJA (100 °C/W) | Limited to lower-energy surges (IEC 61000-4-5 Level 3); unsuitable for automotive load dump where 1500 W is required | Select only if board space is constrained and surge threat level is ≤1 kV; verify thermal margin with reduced pad area |
| 1.5KE540A | Through-hole DO-201 package; identical electrical specs but no AEC-Q101 qualification; 1000 W PPPM rating | Not approved for automotive under-hood use; requires wave soldering or hand-soldering; less compatible with automated SMT lines | Use only in non-automotive industrial equipment where manual assembly is acceptable and 1000 W surge capacity suffices |
Compared with SMBJ540A and 1.5KE540A, the 1.5SMC540AHM3_B/I uniquely combines AEC-Q101 qualification, 1500 W surge capability, and SMC surface-mount compatibility - making it the only option qualified for high-reliability automotive 48 V systems requiring zero-layout changes and full reflow compatibility.
Availability
1.5SMC540AHM3_B/I is available at Aetrix Electronics and suitable for automotive electronics, industrial 48 V power distribution, and telecom infrastructure requiring stable component supply with guaranteed long-term continuity.
Supply support for 1.5SMC540AHM3_B/I 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The 1.5SMC Series was developed specifically for robust, high-power transient suppression in harsh environments - emphasizing AEC-Q101 compliance, stable clamping, and SMT manufacturability for next-generation vehicle electrification and industrial automation.
FAQ
What is the maximum clamping voltage of the 1.5SMC540AHM3_B/I under a 10/1000 µs surge?
The 1.5SMC540AHM3_B/I clamps to a maximum of 740 V when subjected to its rated 2.03 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on 8.0 mm × 8.0 mm copper pads per JEDEC standards and represents the upper limit of voltage seen by protected circuitry during worst-case surge events.
Is the 1.5SMC540AHM3_B/I qualified for automotive applications?
Yes, the 1.5SMC540AHM3_B/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3_B" (halogen-free, RoHS-compliant, AEC-Q101 qualified). It has passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT), making it suitable for under-hood and chassis-mounted automotive electronics.
What does the "B" in 1.5SMC540AHM3_B/I signify?
The "B" in 1.5SMC540AHM3_B/I denotes the revision level for AEC-Q101 qualified variants covering the 250 V to 540 V VBR range. Per Vishay documentation, "_B" is assigned to 1.5SMC250A through 1.5SMC540A devices meeting automotive qualification requirements, distinguishing them from commercial-grade "_A" versions.
What is the reverse leakage current of the 1.5SMC540AHM3_B/I at its stand-off voltage?
At its rated stand-off voltage (VWM) of 459 V and TA = 25 °C, the 1.5SMC540AHM3_B/I exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power loss in high-impedance bias networks and preserves accuracy in precision voltage monitoring circuits.
Can the 1.5SMC540AHM3_B/I be used in bidirectional configurations?
No, the 1.5SMC540AHM3_B/I is a unidirectional TVS diode, as indicated by its "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., 1.5SMC540CA). Using this part in bidirectional applications would result in forward conduction during negative transients, potentially causing failure or incorrect protection behavior.
1.5SMC540AHM3_B/I 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC540AHM3_B/I FAQ
1.How can I place an order for 1.5SMC540AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC540AHM3_B/I 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 1.5SMC540AHM3_B/I reliable?
The price and inventory of 1.5SMC540AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC540AHM3_B/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC540AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC540AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC540AHM3_B/I?
1.5SMC540AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC540AHM3_B/I 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 1.5SMC540AHM3_B/I?
For technical support, including 1.5SMC540AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC540AHM3_B/I requirements.
6.How does Aetrix verify that 1.5SMC540AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC540AHM3_B/I 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 1.5SMC540AHM3_B/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC540AHM3_B/I?
All 1.5SMC540AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC540AHM3_B/I, 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 1.5SMC540AHM3_B/I part is unused and in its original packaging.
Return procedure for 1.5SMC540AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC540AHM3_B/I Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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