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Vishay General Semiconductor - Diodes Division 1.5SMC39AHE3_A/H
- Part No.:
- 1.5SMC39AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39AHE3_A/H.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,978
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Product details
Overview
1.5SMC39AHE3_A/H 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 39 V breakdown voltage (VBR = 37.1–41.0 V at 1 mA), 33.3 V stand-off voltage (VWM), clamps to ≤53.9 V at 27.8 A peak pulse current, and delivers 1500 W peak pulse power with a 10/1000 μs waveform - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC39AHE3_A/H datasheet, 1.5SMC39AHE3_A/H pinout, 1.5SMC39AHE3_A/H application, or 1.5SMC39AHE3_A/H equivalent, this device is evaluated for AEC-Q101 qualified surge immunity in 12 V/24 V automotive subsystems, high-reliability industrial PLC inputs, and DC power rail ESD/Lightning protection where low clamping voltage and fast response (<1 ns) are critical.
Technical Context
The 1.5SMC39AHE3_A/H operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve stable reverse breakdown and low incremental surge resistance. Its clamping behavior is defined by a 10/1000 μs double-exponential pulse, with thermal derating above 25 °C per Fig. 2 and maximum junction temperature of 150 °C.
It is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine), exhibits ≤1.0 μA reverse leakage at VWM, and maintains <0.1 % duty cycle repeatability. The device meets MSL Level 1 per J-STD-020 and is RoHS-compliant with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 37.1 V / 41.0 V at 1 mA - defines precise avalanche initiation threshold for predictable overvoltage triggering |
| VWM | 33.3 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | ≤53.9 V at 27.8 A - clamping voltage under 1500 W 10/1000 μs surge, limiting downstream IC stress |
| PPPM | 1500 W - peak pulse power handling capability with 0.01 % duty cycle, suitable for lightning and inductive switching transients |
| TJ max | 150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on standard 8.0 mm × 8.0 mm copper pads |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Avalanche breakdown terminal | Connected to protected line (e.g., 12 V supply or CAN_H); band-marked end determines orientation during placement |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Withstands high-energy transients (e.g., ISO 7637-2 Pulse 5a) without degradation when mounted on 8 mm × 8 mm copper pads |
| Glass-passivated junction | Ensures stable VBR tolerance (±5 %), low leakage (<1 μA), and long-term reliability under thermal cycling |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor modules |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during surge events, protecting 3.3 V/5 V logic and MOSFET gate drivers |
| MSL Level 1 rating | Allows unlimited floor life and reflow at peak 260 °C without moisture-induced failure |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-supplied ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges within 1 ns. Use Value: Limits voltage to ≤53.9 V during 1500 W pulses, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: Safeguarding analog outputs (4–20 mA) and digital I/O (RS-485, IO-Link) in factory automation sensors. IC Role / Device Role / Timing Role: Standoff-rated TVS on signal lines to absorb ESD (IEC 61000-4-2 ±15 kV) and inductive kickback. Use Value: Maintains 33.3 V stand-off while clamping to 53.9 V, preserving signal integrity and avoiding false triggers in PLC inputs. |
| DC Power Supply Input Protection | Telecom Line Surge Suppression |
Use Scenario: Front-end protection for 24 V industrial power supplies against lightning-induced surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: Primary TVS in series with fuse and common-mode choke on AC/DC or DC/DC converter inputs. Use Value: Absorbs 1500 W pulses without thermal runaway, enabling compliance with EN 61000-4-5 Level 3 (2 kV line-earth). |
Use Scenario: Secondary protection on telecom/data line interfaces (e.g., PoE PSE, DSL line cards) exposed to induced surges. IC Role / Device Role / Timing Role: Unidirectional clamp on DC bias rails feeding line drivers or transformer-coupled circuits. Use Value: Low VC/VBR ratio ensures minimal disruption to 48 V phantom power or data signal swing during transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ39A-E3/52 | Lower peak power (600 W), SMB package (DO-214AA), same VBR range and AEC-Q101 qualification | Reduced surge margin; suited for space-constrained PCBs where 1500 W is not required | Select when board area is limited and surge energy is ≤600 W (e.g., infotainment USB ports) |
| 1.5KE39A | Through-hole TO-204AE (DO-201AE) package, identical electrical specs but no AEC-Q101 qualification | Not automotive-qualified; used in legacy industrial equipment or cost-sensitive consumer designs | Choose for prototyping or non-automotive production where leaded assembly is acceptable and qualification is not mandated |
Compared with SMBJ39A-E3/52 and 1.5KE39A, the 1.5SMC39AHE3_A/H uniquely combines 1500 W surge capability, SMC surface-mount form factor, and AEC-Q101 qualification - making it the only option among the three validated for under-hood automotive deployment with full thermal and reliability assurance.
Availability
1.5SMC39AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controller (PLC) inputs, and telecom power interface protection requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 1.5SMC39AHE3_A/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The 1.5SMC Series is engineered for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where consistent clamping performance and AEC-Q101 compliance are mandatory.
FAQ
What is the breakdown voltage tolerance for 1.5SMC39AHE3_A/H?
The 1.5SMC39AHE3_A/H has a specified breakdown voltage (VBR) range of 37.1 V to 41.0 V at 1 mA test current, corresponding to a ±5 % tolerance around the nominal 39 V rating. This tight tolerance ensures consistent surge initiation across production lots and supports reliable system-level overvoltage design margins in automotive and industrial applications.
Is 1.5SMC39AHE3_A/H suitable for bidirectional transient protection?
No, 1.5SMC39AHE3_A/H is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the 1.5SMC39CA variant. Using 1.5SMC39AHE3_A/H in bidirectional configurations risks forward conduction during negative transients and inadequate clamping - always verify polarity alignment in circuit layout.
What does the "HE3_A/H" suffix mean in 1.5SMC39AHE3_A/H?
The "HE3" denotes RoHS-compliant and AEC-Q101 qualified construction; "A" indicates revision level A per ordering code; "/H" specifies packaging in 7-inch plastic tape and reel with 850 units per reel. This full suffix confirms automotive-grade qualification, environmental compliance, and standardized surface-mount handling - critical for Tier 1 automotive procurement.
How does the clamping voltage of 1.5SMC39AHE3_A/H compare to its stand-off voltage?
The 1.5SMC39AHE3_A/H has a stand-off voltage (VWM) of 33.3 V and a maximum clamping voltage (VC) of 53.9 V at 27.8 A, yielding a clamping ratio of ~1.62. This ratio reflects effective overvoltage suppression: the device remains non-conductive below 33.3 V, then rapidly transitions to low-impedance conduction to limit surge voltage to under 54 V - protecting downstream 36 V-rated components.
Can 1.5SMC39AHE3_A/H be used in place of older 1.5SMC39A variants without layout changes?
Yes - 1.5SMC39AHE3_A/H shares identical SMC (DO-214AB) package dimensions, pinout, and thermal pad requirements with legacy 1.5SMC39A parts. No PCB redesign is needed; however, the HE3 version adds AEC-Q101 qualification and RoHS compliance, making it a drop-in upgrade for automotive and high-reliability industrial designs previously using non-qualified variants.
1.5SMC39AHE3_A/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):
- 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)
1.5SMC39AHE3_A/H FAQ
1.How can I place an order for 1.5SMC39AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39AHE3_A/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 1.5SMC39AHE3_A/H reliable?
The price and inventory of 1.5SMC39AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC39AHE3_A/H is usually 5 days.
3.What payment methods are accepted for 1.5SMC39AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39AHE3_A/H?
1.5SMC39AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39AHE3_A/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 1.5SMC39AHE3_A/H?
For technical support, including 1.5SMC39AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39AHE3_A/H requirements.
6.How does Aetrix verify that 1.5SMC39AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39AHE3_A/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 1.5SMC39AHE3_A/H meets industry standards.
7.What is the process for return or replacement of 1.5SMC39AHE3_A/H?
All 1.5SMC39AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39AHE3_A/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 1.5SMC39AHE3_A/H part is unused and in its original packaging.
Return procedure for 1.5SMC39AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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