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Vishay General Semiconductor - Diodes Division 1.5SMC39CAHE3_A/I
- Part No.:
- 1.5SMC39CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39CAHE3_A/I.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,529
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Product details
Overview
1.5SMC39CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 39 V breakdown voltage (VBR = 37.1–41.0 V at IT = 1.0 mA), 53.9 V maximum clamping voltage (VC) at 27.8 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform). It protects signal lines and power rails in automotive sensor units, industrial I/O interfaces, and telecom surge-prone circuits.
For engineers reviewing the 1.5SMC39CAHE3_A/I datasheet, 1.5SMC39CAHE3_A/I pinout, 1.5SMC39CAHE3_A/I application, or 1.5SMC39CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge rating, low incremental surge resistance, and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamped transient protector: when reverse (or forward, in bidirectional mode) voltage exceeds VBR, it avalanches into low-impedance conduction to shunt surge energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns), while the SMC package provides robust thermal dissipation (RθJA = 75 °C/W).
Designed for repetitive transients up to 0.01% duty cycle, it sustains 1500 W peak pulse power under 10/1000 µs waveform conditions and maintains clamping performance across -65 °C to +150 °C operating junction temperature. The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at IT = 1.0 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 33.3 V - maximum continuous reverse working voltage before leakage rises significantly; sets safe operating margin below VBR |
| VC @ IPPM | 53.9 V at 27.8 A - clamping voltage during 1500 W transient; determines protected circuit's maximum stress level |
| IPPM | 27.8 A (10/1000 µs) - peak surge current handling capacity; defines protection level against lightning or inductive switch-off spikes |
| PPPM | 1500 W - peak pulse power rating; enables robust protection of 12 V/24 V automotive and industrial bus lines |
| TJ max | +150 °C - maximum junction temperature; supports operation in under-hood or high-ambient industrial environments |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal footprint per terminal |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C reflow peak), polarity-unmarked for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Conducts surge current in either direction; connects to protected line needing clamping reference |
| Cathode | Transient current entry (bidirectional) | Paired terminal with Anode; forms symmetrical clamping path-no polarity marking required |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualified | Validated for automotive applications including engine control modules, ADAS sensors, and body electronics |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V systems without degradation |
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1.0 µA at VWM), and long-term reliability |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during transients-critical for protecting 3.3 V/5 V logic and analog front-ends |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus lines and analog sensor outputs (e.g., pressure, temperature) in engine bay or chassis-mounted ECUs exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS diode placed across differential or single-ended signal pairs to clamp ESD and surge events before they reach MCU ADC inputs or transceivers. Use Value: Maintains signal integrity under 1500 W transients while meeting AEC-Q101 requirements-eliminates need for redundant protection schemes. |
Use Scenario: Safeguarding 24 V DC digital input channels on programmable logic controller (PLC) modules subject to field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary overvoltage clamp on each input channel, mounted directly at connector entry point to minimize inductance and maximize clamping speed. Use Value: Limits transient voltage to ≤53.9 V, ensuring downstream optocouplers and Schmitt triggers remain within absolute maximum ratings during 10/1000 µs surges. |
| Telecom Line Interface Protection | Consumer Power Adapter ESD Guard |
|
Use Scenario: Shielding Ethernet PHY interface pins (e.g., MDI-X) and PoE detection circuits from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional TVS placed between differential pair and ground to suppress common-mode transients without distorting signal integrity. Use Value: Low capacitance (typ. <100 pF at 0 V) preserves 100BASE-TX signal rise time; 53.9 V clamping prevents PHY latch-up during 4 kV contact ESD. |
Use Scenario: Adding secondary surge immunity to USB-C or barrel-jack input stages of wall adapters and battery chargers subjected to user-handling ESD and mains coupling. IC Role / Device Role / Timing Role: Final-stage TVS across input capacitor terminals to absorb residual transients that bypass primary MOV-based AC-side protection. Use Value: Withstands repeated 1500 W pulses without parametric shift-extends adapter lifetime in high-ESD environments like retail or medical facilities. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ39CA | Lower peak power (600 W), SMB package (smaller thermal mass), same VBR/VC specs | Best suited for space-constrained consumer ports or low-energy signal lines-not recommended for 24 V industrial bus protection | Select when board area is critical and surge threat level is limited to IEC 61000-4-2 Level 4 (8 kV air/4 kV contact) |
| 1.5KE39CA | Through-hole DO-201 package, identical electrical specs but higher RθJA (100 °C/W), no AEC-Q101 qualification | Used in legacy industrial power supplies or prototyping where manual assembly is acceptable and automotive qualification is unnecessary | Choose only for cost-sensitive non-automotive designs where SMT automation is not required |
Compared with SMBJ39CA and 1.5KE39CA, the 1.5SMC39CAHE3_A/I delivers superior thermal performance (RθJA = 75 °C/W), full AEC-Q101 validation, and 2.5× the peak power handling-making it the preferred choice for production automotive and high-reliability industrial SMT assemblies.
Availability
1.5SMC39CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface boards requiring stable component supply, AEC-Q101 compliance, and repeatable 1500 W surge protection performance.
Supply support for 1.5SMC39CAHE3_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 was engineered specifically for high-power, surface-mount transient suppression in automotive, industrial, and telecom infrastructure-balancing clamping precision, surge robustness, and manufacturability in automated SMT lines.
FAQ
What is the breakdown voltage tolerance for 1.5SMC39CAHE3_A/I?
The 1.5SMC39CAHE3_A/I has a specified breakdown voltage range of 37.1 V to 41.0 V at test current IT = 1.0 mA, representing a ±5% tolerance around the nominal 39 V rating. This tight tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage margining in safety-critical designs such as automotive sensor interfaces.
Is 1.5SMC39CAHE3_A/I suitable for automotive applications?
Yes, the 1.5SMC39CAHE3_A/I carries the HE3 suffix, confirming it is RoHS-compliant and AEC-Q101 qualified. It meets the stress testing requirements for temperature cycling, humidity bias, and mechanical shock defined in AEC-Q101, making it approved for use in engine control units, ADAS camera modules, and other automotive electronic systems where reliability under harsh environmental conditions is mandatory.
What does the "CA" suffix mean in 1.5SMC39CAHE3_A/I?
The "CA" suffix in 1.5SMC39CAHE3_A/I denotes a bidirectional configuration: the device provides symmetrical transient voltage suppression in both polarities, with identical VBR, VC, and IPPM characteristics in forward and reverse directions. This eliminates the need for polarity-aware layout and simplifies protection of AC-coupled or floating signal paths such as CAN bus lines or Ethernet differential pairs.
How is thermal performance characterized for 1.5SMC39CAHE3_A/I?
The 1.5SMC39CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes standard JEDEC high-K board construction and enables accurate junction temperature estimation during repetitive surge events-critical for validating long-term reliability in thermally constrained enclosures.
What packaging format does 1.5SMC39CAHE3_A/I ship in?
The 1.5SMC39CAHE3_A/I is supplied in 13-inch diameter plastic tape and reel (delivery mode "I"), with 3500 units per reel. The tape conforms to EIA-481 standards and supports high-speed pick-and-place assembly. The "HE3" prefix indicates AEC-Q101 qualification and RoHS compliance, while the "_A/I" suffix specifies revision A and reel packaging.
1.5SMC39CAHE3_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:
- -
- Bidirectional Channels:
- 1
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC39CAHE3_A/I FAQ
1.How can I place an order for 1.5SMC39CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39CAHE3_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 1.5SMC39CAHE3_A/I reliable?
The price and inventory of 1.5SMC39CAHE3_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 1.5SMC39CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC39CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39CAHE3_A/I?
1.5SMC39CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39CAHE3_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 1.5SMC39CAHE3_A/I?
For technical support, including 1.5SMC39CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39CAHE3_A/I requirements.
6.How does Aetrix verify that 1.5SMC39CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39CAHE3_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 1.5SMC39CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC39CAHE3_A/I?
All 1.5SMC39CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39CAHE3_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 1.5SMC39CAHE3_A/I part is unused and in its original packaging.
Return procedure for 1.5SMC39CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC39CAHE3_A/I Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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