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Vishay General Semiconductor - Diodes Division 1.5SMC540AHM3_B/H
- Part No.:
- 1.5SMC540AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC540AHM3_B/H.pdf
- Description:
- TVS DIODE 459VWM 740VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,078
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Product details
Overview
1.5SMC540AHM3_B/H from Vishay General Semiconductor is a unidirectional 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), 459 V stand-off voltage (VWM), 740 V clamping voltage (VC) at 2.03 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform - deployed in automotive powertrain control units to safeguard 48 V battery management ICs against load dump transients.
For engineers reviewing the 1.5SMC540AHM3_B/H datasheet, 1.5SMC540AHM3_B/H pinout, 1.5SMC540AHM3_B/H application, or 1.5SMC540AHM3_B/H equivalent, key selection criteria include its AEC-Q101 qualification, halogen-free RoHS-compliant HM3 packaging, low thermal resistance (RθJL = 15 °C/W), and verified clamping performance under repetitive 0.01% duty cycle surges.
Technical Context
This TVS operates as a unidirectional clamping device with a cathode-banded SMC (DO-214AB) package, optimized for fast response (<1 ps) to voltage transients induced by inductive switching or lightning. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and robust surge handling up to 200 A IFSM (8.3 ms half-sine).
The device is rated for continuous operation from −65 °C to +150 °C junction temperature, with thermal derating above 25 °C per Figure 2. Its MSL Level 1 rating (260 °C peak reflow) and matte tin-plated leads meet J-STD-002 solderability standards for automated SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 459 V - Maximum reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (min/max) | 513 V / 567 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 740 V at 2.03 A - Clamped voltage under 10/1000 µs surge; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 1500 W - Peak pulse power dissipation capability; supports high-energy transients without failure under defined waveform. |
| IFSM | 200 A - Non-repetitive forward surge current rating (8.3 ms half-sine); validates robustness against short-duration inrush events. |
| TJ max | +150 °C - Maximum junction temperature; enables reliable operation in under-hood automotive environments. |
| RθJL | 15 °C/W - Junction-to-leads thermal resistance; critical for estimating temperature rise during sustained surge conditions. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads. Cathode identified by black band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink terminal | Connected to protected line; conducts transient energy to ground when VWM exceeded. |
| Anode (unmarked end) | Reference/return path | Typically tied to system ground or low-impedance return; completes clamping path during overvoltage event. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain, body control, and ADAS modules requiring long-term reliability under thermal cycling and vibration. |
| Halogen-free & RoHS-compliant (HM3) | Meets environmental compliance mandates for Tier 1 automotive suppliers and industrial OEMs with strict material declarations. |
| 1500 W peak pulse power (10/1000 µs) | Withstands high-energy transients common in 48 V systems, such as ISO 7637-2 Pulse 5a load dump events. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive gate drivers and MCU I/O. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow without moisture-induced damage; eliminates pre-bake requirement in production. |
Applications
| Automotive Power Distribution | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of 48 V DC-DC converter input stages against load dump transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed upstream of input filter capacitors and controller ICs. Use Value: Limits transient voltage to ≤740 V, preventing overvoltage failure of buck controller MOSFETs and bootstrap circuitry. |
Use Scenario: Surge suppression on AC line inputs of variable frequency drives exposed to switching noise and lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level transient suppressor on rectified DC bus prior to IGBT gate driver supply rails. Use Value: Absorbs 1500 W pulses without degradation, maintaining isolation integrity between mains and low-voltage control logic. |
| Telecom Power Feeds | Onboard Charger Interfaces |
Use Scenario: Input protection for PoE++ (IEEE 802.3bt) powered devices subjected to Ethernet cable ESD and surge coupling. IC Role / Device Role / Timing Role: Standoff-rated TVS on 57 V DC feed line, coordinated with secondary-side TVS and common-mode chokes. Use Value: Maintains 459 V VWM margin above nominal PoE++ voltage while clamping to 740 V within 1 ns. |
Use Scenario: DC-link protection in EV onboard chargers during grid connection/disconnection and regenerative braking transitions. IC Role / Device Role / Timing Role: Bidirectional-capable but used unidirectionally across high-side switch node to clamp inductive kickback. Use Value: Withstands repetitive 200 A IFSM surges and maintains <1 µA leakage at 459 V, ensuring minimal standby loss. |
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 (DO-214AA), smaller footprint and higher RθJA (100 °C/W). | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or repetitive automotive surges. | Select only for space-constrained consumer or telecom applications where 1500 W rating is not required. |
| 1.5KE540A | Through-hole DO-201 package; identical electrical specs but no AEC-Q101 qualification or MSL Level 1 rating. | Not suitable for automated SMT production or automotive under-hood use due to leaded construction and thermal limitations. | Use only in legacy through-hole designs or non-automotive industrial equipment with manual assembly. |
Compared with SMBJ540A and 1.5KE540A, the 1.5SMC540AHM3_B/H uniquely combines AEC-Q101 qualification, 1500 W surge capacity, SMC surface-mount compatibility, and halogen-free compliance - making it the sole option for new automotive-grade 48 V system designs requiring full PPAP traceability and reflow process compatibility.
Availability
1.5SMC540AHM3_B/H is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive inputs, and telecom power feed applications requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for 1.5SMC540AHM3_B/H 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series was developed to deliver high-power, surface-mount transient suppression for demanding automotive and industrial environments - prioritizing AEC-Q101 qualification, thermal robustness, and consistent clamping performance across temperature and lifetime.
FAQ
What is the clamping voltage of the 1.5SMC540AHM3_B/H under a 10/1000 µs surge?
The 1.5SMC540AHM3_B/H has a maximum clamping voltage (VC) of 740 V at 2.03 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per Figure 1 and Table on page 2 of Vishay document 88303, and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The 1.5SMC540AHM3_B/H maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC540AHM3_B/H AEC-Q101 qualified?
Yes, the 1.5SMC540AHM3_B/H is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's 1.5SMC Series datasheet (Rev. 09-Mar-2026, p.3, Note 2). This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock - validating suitability for automotive powertrain, chassis, and body electronics applications. The 1.5SMC540AHM3_B/H carries full PPAP documentation support.
What does the "HM3" suffix indicate for the 1.5SMC540AHM3_B/H?
The "HM3" suffix in 1.5SMC540AHM3_B/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering table (p.3), HM3 devices use molding compounds and plating that meet JEDEC J-STD-020 MSL Level 1 and JESD 201 Class 2 whisker resistance requirements. The "H" indicates 7" tape-and-reel packaging (850 units/reel), and "B" specifies AEC-Q101 qualification for the 250–540 V voltage range - confirming the 1.5SMC540AHM3_B/H meets automotive material and reliability standards.
Can the 1.5SMC540AHM3_B/H be used in bidirectional configurations?
No, the 1.5SMC540AHM3_B/H 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 the 1.5SMC540AHM3_B/H in reverse-biased configurations risks permanent breakdown due to lack of symmetrical avalanche structure. For bidirectional protection at 540 V, the 1.5SMC540CA or equivalent must be selected instead of the 1.5SMC540AHM3_B/H.
What is the thermal resistance from junction to leads (RθJL) for the 1.5SMC540AHM3_B/H?
The 1.5SMC540AHM3_B/H has a typical junction-to-leads thermal resistance (RθJL) of 15 °C/W, as specified in the Thermal Characteristics table (p.3) of Vishay document 88303. This low value enables efficient heat transfer from the silicon die to PCB copper pads via the leads, supporting reliable operation during repetitive surge events. When mounted per recommended pad layout (0.31" × 0.31" copper), the 1.5SMC540AHM3_B/H achieves optimal thermal performance without external heatsinking.
1.5SMC540AHM3_B/H 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/H FAQ
1.How can I place an order for 1.5SMC540AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC540AHM3_B/H 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/H reliable?
The price and inventory of 1.5SMC540AHM3_B/H 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/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC540AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC540AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC540AHM3_B/H?
1.5SMC540AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC540AHM3_B/H 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/H?
For technical support, including 1.5SMC540AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC540AHM3_B/H requirements.
6.How does Aetrix verify that 1.5SMC540AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC540AHM3_B/H 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/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC540AHM3_B/H?
All 1.5SMC540AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC540AHM3_B/H, 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/H part is unused and in its original packaging.
Return procedure for 1.5SMC540AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC540AHM3_B/H Tags
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