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Vishay General Semiconductor - Diodes Division 1.5SMC39AHM3_A/I
- Part No.:
- 1.5SMC39AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39AHM3_A/I.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,984
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Product details
Overview
1.5SMC39AHM3_A/I 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 33.3 V stand-off voltage (VWM), 37.1–41.0 V breakdown voltage (VBR) at 1 mA, 53.9 V maximum clamping voltage (VC) at 27.8 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC39AHM3_A/I datasheet, 1.5SMC39AHM3_A/I pinout, 1.5SMC39AHM3_A/I application, or 1.5SMC39AHM3_A/I equivalent, key selection criteria include clamping performance under 27.8 A surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), and SMC (DO-214AB) package thermal resistance (RθJA = 75 °C/W).
Technical Context
The 1.5SMC39AHM3_A/I operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast response time (<1 ns) and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 µs double-exponential surge waveform, with derating applied above TA = 25 °C per Figure 2 of the datasheet.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it supports automated placement and meets J-STD-020 MSL Level 1 (peak reflow ≤260 °C). The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33.3 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe working margin below breakdown. |
| VBR (min/max) | 37.1 V / 41.0 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients. |
| VC @ IPPM | 53.9 V at 27.8 A - Clamped voltage during 1500 W surge; determines protected circuit's maximum transient exposure. |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 µs waveform; enables protection against lightning-induced surges and inductive switching spikes. |
| IFSM | 200 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports high-energy fault clearing in power rails. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood automotive and industrial environments. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance (on recommended pad layout); informs heatsinking requirements for sustained power dissipation. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; carries surge current during reverse-biased clamping. |
| Cathode | Reverse-biased clamping terminal | Marked with band; connected to higher-potential side (e.g., VCC rail or signal line); initiates avalanche conduction when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables reliable suppression of high-energy transients (e.g., ISO 7637-2 Pulse 5a) without degradation in automotive ECUs. |
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control, ADAS sensors, and body electronics per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets environmental compliance mandates for global OEM supply chains and end-of-life recycling requirements. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies SMT line integration and inventory management. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ESD events in vehicle cabins. IC Role / Device Role: Unidirectional TVS placed between signal line and ground, clamping transients before they reach sensitive input stages. Use Value: Limits voltage excursion to ≤53.9 V during 27.8 A surge, preserving signal integrity and preventing latch-up in 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to inductive kickback from solenoids and contactors. IC Role / Device Role: Primary overvoltage clamp on 24 V DC input channels, coordinated with series impedance for energy absorption. Use Value: Withstands repetitive 1500 W surges at 0.01 % duty cycle, enabling long service life in factory automation environments. |
| Telecom Power Rail Protection | Consumer Power Adapter Output Protection |
Use Scenario: Secondary-side transient suppression on 48 V PoE-powered equipment (e.g., IP cameras, wireless access points) subjected to lightning-induced surges. IC Role / Device Role: Unidirectional TVS across output rail and ground, absorbing energy from coupled common-mode transients. Use Value: Clamps to 53.9 V within nanoseconds, preventing damage to downstream DC-DC converters rated for ≤60 V input. |
Use Scenario: Output-stage protection in wall-mounted AC-DC adapters for smart home devices, guarding against output short-circuit recovery spikes. IC Role / Device Role: Final-stage TVS on regulated 5 V/12 V outputs, limiting voltage overshoot during dynamic load transitions. Use Value: 33.3 V VWM provides 20 % margin above nominal output, while 53.9 V VC ensures USB/USB-C port ICs remain within absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A-E3/52T | Lower PPPM (600 W), smaller SMB package (DO-214AA), VC = 58.1 V @ 10.3 A | Targeted at space-constrained consumer electronics; insufficient for 1500 W automotive load-dump events. | Select only if board area is critical and surge energy is ≤600 W (e.g., USB data lines). |
| 1.5KE39A | Through-hole TO-204AE (DO-41), same VBR/VC, but no AEC-Q101 or halogen-free certification | Legacy industrial designs where reworkability and manual assembly are prioritized over automotive qualification. | Choose only for non-automotive, cost-sensitive through-hole applications with no MSL or RoHS constraints. |
Compared with SMBJ36A-E3/52T and 1.5KE39A, the 1.5SMC39AHM3_A/I uniquely delivers 1500 W surge capacity in an AEC-Q101-qualified, halogen-free SMC package - making it the sole option meeting both high-energy automotive immunity and modern environmental compliance requirements.
Availability
1.5SMC39AHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power supplies, and consumer power adapter designs requiring stable component supply, AEC-Q101 validation, and halogen-free compliance.
Supply support for 1.5SMC39AHM3_A/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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The 1.5SMC Series is engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against lightning, ESD, and inductive switching is mission-critical.
FAQ
What is the clamping voltage of the 1.5SMC39AHM3_A/I under maximum surge conditions?
The 1.5SMC39AHM3_A/I clamps to a maximum of 53.9 V when subjected to its rated 27.8 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during transient events. The 1.5SMC39AHM3_A/I maintains this clamping performance across its qualified operating temperature range.
Is the 1.5SMC39AHM3_A/I suitable for automotive applications?
Yes - the 1.5SMC39AHM3_A/I carries the HM3 suffix, confirming it is halogen-free, RoHS-compliant, and AEC-Q101 qualified. It has undergone stress testing per the AEC-Q101 standard for failure mechanisms including HTRB, HTGB, and temperature cycling, making it approved for use in automotive powertrain, chassis, and body electronics. The 1.5SMC39AHM3_A/I is explicitly listed in Vishay's AEC-Q101 qualified product matrix for the 1.5SMC family.
What does the "HM3_A/I" suffix mean in 1.5SMC39AHM3_A/I?
The "HM3" denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification; "A" indicates the device belongs to the 1.5SMC-A series (6.8 V to 220 V VWM range); "I" specifies packaging in 13-inch tape-and-reel format (3500 units per reel). This full suffix identifies the 1.5SMC39AHM3_A/I as a production-ready, automotive-grade variant with verified environmental and reliability credentials - distinct from commercial-grade E3/M3 variants.
How does the 1.5SMC39AHM3_A/I compare to bidirectional TVS diodes like 1.5SMC39CA?
The 1.5SMC39AHM3_A/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., VCC-to-ground), offering tighter VBR tolerance and lower leakage. In contrast, 1.5SMC39CA is bidirectional and suited for AC or floating signal lines (e.g., RS-485), but exhibits higher leakage and symmetric clamping in both directions. The 1.5SMC39AHM3_A/I cannot replace 1.5SMC39CA in AC-coupled applications due to its inherent polarity dependence and lack of reverse conduction capability.
What is the thermal resistance and recommended PCB layout for optimal performance of the 1.5SMC39AHM3_A/I?
The 1.5SMC39AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended pad layout: 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal. To ensure reliable 1500 W surge handling and prevent thermal runaway, designers must replicate this pad size and use internal ground/power planes for additional heat spreading. The 1.5SMC39AHM3_A/I datasheet Figure 2 provides derating curves for elevated ambient temperatures.
1.5SMC39AHM3_A/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):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 53.9V
- Current - Peak Pulse (10/1000µs):
- 27.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
1.5SMC39AHM3_A/I FAQ
1.How can I place an order for 1.5SMC39AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39AHM3_A/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 1.5SMC39AHM3_A/I reliable?
The price and inventory of 1.5SMC39AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC39AHM3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC39AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39AHM3_A/I?
1.5SMC39AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39AHM3_A/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 1.5SMC39AHM3_A/I?
For technical support, including 1.5SMC39AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39AHM3_A/I requirements.
6.How does Aetrix verify that 1.5SMC39AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39AHM3_A/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 1.5SMC39AHM3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC39AHM3_A/I?
All 1.5SMC39AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39AHM3_A/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 1.5SMC39AHM3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC39AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC39AHM3_A/I Tags
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