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Vishay General Semiconductor - Diodes Division 1.5SMC39CAHE3/57T
- Part No.:
- 1.5SMC39CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39CAHE3/57T.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,813
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Product details
Overview
1.5SMC39CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 33.3 V standoff voltage (VWM), 37.1–41.0 V breakdown voltage (VBR) at 1 mA, 53.9 V clamping voltage (VC) at 27.8 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 μs waveform. It is AEC-Q101 qualified and housed in an SMC (DO-214AB) package - ideal for automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC39CAHE3/57T datasheet, 1.5SMC39CAHE3/57T pinout, 1.5SMC39CAHE3/57T application, or 1.5SMC39CAHE3/57T equivalent, this device delivers verified bidirectional clamping performance, RoHS-compliant AEC-Q101 qualification, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive and industrial PCB designs requiring lightning and ESD immunity.
Technical Context
The 1.5SMC39CAHE3/57T operates as a bidirectional avalanche diode, symmetrically clamping voltage transients in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), enabling effective suppression of inductive switching spikes and ESD events per IEC 61000-4-2 and ISO 16750-2.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable operation up to TJ = 150 °C. Derating curves confirm sustained 1500 W pulse handling only at TA ≤ 25 °C on 8.0 mm × 8.0 mm copper pads - a key layout constraint for automotive power rail protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 33.3 V - maximum continuous reverse voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (Breakdown) | 37.1–41.0 V at 1 mA - guaranteed avalanche onset range; ensures predictable turn-on during transients |
| VC (Clamping) | 53.9 V at 27.8 A - peak voltage seen by protected circuit during 10/1000 μs surge; determines downstream component stress |
| PPPM | 1500 W - peak pulse power dissipation capability; enables protection against severe lightning-induced surges |
| IPPM | 27.8 A - maximum non-repetitive surge current; defines minimum trace width and fuse coordination requirements |
| TJ max. | +150 °C - maximum junction temperature; supports under-hood automotive deployment without derating penalties |
| MSL Level | Level 1 (J-STD-020) - no floor life limitation; allows indefinite storage and standard reflow without baking |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical PN junction; conducts during negative-going surges |
| Anode | Transient current exit (positive polarity) | Same physical terminal serves as cathode during positive surges due to bidirectional symmetry |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses, or ungrounded sensor pairs without polarity concerns |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per JEDEC standards |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal stress and humidity exposure |
| 1500 W peak pulse rating | Supports IEC 61000-4-5 Level 4 (4 kV line-to-line) surge immunity in industrial control systems |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot during clamping - critical for protecting 3.3 V or 5 V logic interfaces |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor front-ends (e.g., pressure, temperature) from load-dump and jump-start transients. IC Role / Device Role: Bidirectional voltage clamp placed between signal line and ground, absorbing energy before it reaches the IC's ESD structure. Use Value: Prevents latch-up and permanent damage to automotive-grade microcontrollers and ADCs exposed to ISO 7637-2 Pulse 5a (75 V/300 ms) events. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against field-wiring faults and lightning-induced surges. IC Role / Device Role: Primary overvoltage limiter on input terminals, coordinated with series current-limiting resistors and filtering capacitors. Use Value: Maintains signal integrity while limiting input voltage to ≤53.9 V - well below the 60 V absolute maximum rating of typical industrial op-amps and isolators. |
| Telecom Power Feeding | Consumer USB-C Port Protection |
|
Use Scenario: Protecting PoE (Power over Ethernet) midspan injectors and splitters from induced surges on twisted-pair data lines carrying DC power. IC Role / Device Role: Bidirectional TVS across differential pairs (e.g., ETH+ / ETH−) and common-mode to ground. Use Value: Clamps common-mode transients up to 1500 W without degrading 100BASE-TX signal integrity due to low junction capacitance (<100 pF at 0 V). |
Use Scenario: Secondary-level surge protection on USB-C CC, VBUS, and SBU lines in portable docking stations and chargers. IC Role / Device Role: Final-stage clamp after primary GDT or polymer PTC, handling fast-rising ESD and hot-swap transients. Use Value: Withstands >30 kV contact ESD (IEC 61000-4-2) and limits VBUS overshoot to <54 V - preserving USB PD negotiation and preventing port controller latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | Lower peak power (600 W), smaller SMB package (DO-214AA), VC = 58.1 V at 10.3 A | Not suitable for 1500 W surge events; limited to consumer-grade I/O or secondary protection layers | Select when board space is constrained and surge threat level is ≤ IEC 61000-4-5 Level 2 (1 kV line-earth) |
| SMCJ36CA | Same SMC package, identical VWM/VBR, but commercial-grade (no AEC-Q101), VC = 58.1 V at 25.9 A | Lacks automotive qualification and extended temperature validation; unsuitable for under-hood use | Choose for cost-sensitive industrial applications where AEC-Q101 is not mandated and full 1500 W rating is required |
Compared with SMBJ36CA and SMCJ36CA, the 1.5SMC39CAHE3/57T uniquely combines AEC-Q101 qualification, 1500 W pulse rating in the SMC footprint, and a lower clamping voltage (53.9 V vs. ≥58.1 V), making it the only option for automotive front-end protection demanding both high energy absorption and tight voltage limiting.
Availability
1.5SMC39CAHE3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, telecom power feeding circuits, and USB-C port protection requiring stable component supply and long-term lifecycle assurance.
Supply support for 1.5SMC39CAHE3/57T 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, power efficiency, and automotive-grade qualification.
The 1.5SMC Series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated through proven, standardized TVS performance.
FAQ
What is the clamping voltage of the 1.5SMC39CAHE3/57T and how is it measured?
The 1.5SMC39CAHE3/57T has a maximum clamping voltage (VC) of 53.9 V, measured at a peak pulse current (IPPM) of 27.8 A using a standardized 10/1000 μs double-exponential waveform. This value represents the highest voltage the device allows to appear across its terminals during a surge event, directly defining the protection level for downstream components. The test condition is specified in Vishay document 88303, Figure 1 and Table on page 2.
Is the 1.5SMC39CAHE3/57T suitable for automotive applications?
Yes, the 1.5SMC39CAHE3/57T is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix. It meets requirements for temperature cycling, humidity bias, and mechanical shock, and is rated for operation from −65 °C to +150 °C. Its bidirectional architecture and 1500 W surge rating make it appropriate for protecting CAN transceivers, sensor interfaces, and body control modules exposed to ISO 7637-2 and ISO 16750-2 transients.
Does the 1.5SMC39CAHE3/57T have polarity markings?
No, the 1.5SMC39CAHE3/57T is a bidirectional TVS diode and carries no polarity marking on its SMC (DO-214AB) package. Unlike unidirectional variants (e.g., 1.5SMC39A), it functions identically in both directions - conducting during positive or negative voltage excursions exceeding its breakdown threshold. This eliminates orientation errors during automated placement.
What is the standoff voltage (VWM) of the 1.5SMC39CAHE3/57T and why does it matter?
The 1.5SMC39CAHE3/57T has a standoff voltage (VWM) of 33.3 V - the maximum continuous reverse voltage it can block without significant leakage current (<1 μA). This parameter ensures the device remains non-conductive during normal operation while providing sufficient margin below its 37.1–41.0 V breakdown range. It is critical for selecting compatible signal or power rails, such as 24 V automotive systems or 36 V industrial supplies.
How does the 1.5SMC39CAHE3/57T compare to unidirectional versions like 1.5SMC39AHE3/57T?
The 1.5SMC39CAHE3/57T is bidirectional with symmetric clamping in both polarities and no cathode band, whereas 1.5SMC39AHE3/57T is unidirectional with a marked cathode end and conducts only during reverse-biased surges. Their VWM, VBR, and VC values differ: the unidirectional version has VWM = 33.3 V, VBR = 37.1–41.0 V, and VC = 53.9 V, same as the CA variant - but the unidirectional part cannot protect AC-coupled or floating lines without additional design considerations.
1.5SMC39CAHE3/57T 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:
- Discontinued at Digi-Key
- 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)
1.5SMC39CAHE3/57T FAQ
1.How can I place an order for 1.5SMC39CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39CAHE3/57T 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 1.5SMC39CAHE3/57T reliable?
The price and inventory of 1.5SMC39CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC39CAHE3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC39CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39CAHE3/57T?
1.5SMC39CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39CAHE3/57T 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 1.5SMC39CAHE3/57T?
For technical support, including 1.5SMC39CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39CAHE3/57T requirements.
6.How does Aetrix verify that 1.5SMC39CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39CAHE3/57T 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 1.5SMC39CAHE3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC39CAHE3/57T?
All 1.5SMC39CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39CAHE3/57T, 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 1.5SMC39CAHE3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC39CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC39CAHE3/57T Tags
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