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Vishay General Semiconductor - Diodes Division 1.5SMC39CA-E3/57T
- Part No.:
- 1.5SMC39CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC39CA-E3/57T.pdf
- Description:
- TVS DIODE 33.3VWM 53.9VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:1,730
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Product details
Overview
1.5SMC39CA-E3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 33.3 V standoff voltage (VWM), and 53.9 V clamping voltage (VC) at 27.8 A peak pulse current. It protects signal lines and power rails in automotive sensor interfaces and industrial I/O modules against ESD, lightning surges, and inductive switching transients.
For engineers reviewing the 1.5SMC39CA-E3/57T datasheet, 1.5SMC39CA-E3/57T pinout, 1.5SMC39CA-E3/57T application, or 1.5SMC39CA-E3/57T equivalent, this device delivers verified bidirectional clamping performance with ±33.3 V stand-off, low 0.1 % duty-cycle surge capability, MSL Level 1 moisture sensitivity, and AEC-Q101 qualification readiness via HE3/HM3 variants - critical for robust front-end protection in harsh-environment electronics.
Technical Context
The 1.5SMC39CA-E3/57T operates as a bidirectional avalanche diode, symmetrically clamping voltage transients above ±33.3 V in both polarities without polarity marking. Its glass-passivated junction enables fast response (<1 ns) and stable breakdown behavior under repetitive 10/1000 μs pulses up to 1500 W, with thermal resistance RθJA = 75 °C/W on standard 8.0 mm × 8.0 mm copper pads.
Designed for surface-mount automation, it features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, meets UL 94 V-0 flammability, and supports operation from −65 °C to +150 °C. The CA suffix confirms bidirectional functionality, distinguishing it from unidirectional variants like 1.5SMC39A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 33.3 V - maximum continuous reverse voltage before clamping begins in either direction |
| VBR (Breakdown) | 37.1–41.0 V at 1 mA - guaranteed avalanche initiation range, ensuring reliable turn-on margin |
| VC (Clamping) | 53.9 V at 27.8 A (10/1000 μs) - peak voltage seen by protected circuit during worst-case surge |
| PPPM | 1500 W - surge energy handling capacity per single 10/1000 μs pulse, derated above 25 °C |
| IPPM | 27.8 A - maximum non-repetitive surge current the device sustains without failure |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood automotive and industrial enclosures |
| Package | SMC (DO-214AB) - industry-standard 2-pin surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
Package: SMC (DO-214AB), bidirectional - no polarity marking; symmetrical two-terminal construction with cathode/anode terminals electrically interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no marking required |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, sensor bridges) without polarity concerns |
| 1500 W peak pulse rating | Supports IEC 61000-4-5 Level 4 (4 kV surge) compliance when combined with appropriate PCB layout and series impedance |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on downstream ICs - e.g., keeps protected MCU GPIO below absolute maximum ratings during surge events |
| MSL Level 1, 260 °C reflow compatible | Allows standard lead-free SMT assembly without pre-baking; eliminates moisture-related popcorning risk |
| AEC-Q101 qualification path | HE3/HM3 variants available - enables drop-in qualification for automotive body electronics and ADAS sensor interfaces |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor output and microcontroller ADC input to clamp transients before signal conditioning stage. Use Value: Limits voltage excursion to ≤53.9 V during 100 A load dump events, preventing ADC saturation and protecting 3.3 V/5 V rail integrity. |
Use Scenario: Shielding differential RS-485 transceivers in factory automation PLCs from ground loop surges and EFT bursts. IC Role / Device Role / Timing Role: Paired 1.5SMC39CA-E3/57T devices across A–GND and B–GND lines to suppress common-mode transients while preserving signal integrity. Use Value: Maintains <1 ns response time and <20 pF junction capacitance to avoid signal edge degradation at 10 Mbps data rates. |
| Consumer USB-C Port Protection | Telecom DSL Line Interface |
|
Use Scenario: Safeguarding USB-C CC and VCONN pins against ESD (IEC 61000-4-2 ±15 kV contact) in portable docking stations. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector to shunt ESD current before entering level-shifter or PMIC. Use Value: Clamps ESD pulses within 1 ns to <60 V, meeting USB-IF ESD immunity requirements without degrading high-speed signaling. |
Use Scenario: Front-end surge suppression on POTS/DSL line cards subjected to lightning-induced longitudinal surges per GR-1089-CORE. IC Role / Device Role / Timing Role: Primary protection element across tip–ring pair, coordinated with gas discharge tube (GDT) for staged surge handling. Use Value: Absorbs initial 1500 W surge energy while limiting let-through voltage to telecom PHY ICs rated for ≤60 V absolute maximum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Lower peak power (600 W), same VWM (33 V), SMB package (smaller footprint, higher RθJA) | Best suited for space-constrained consumer ports where 600 W surge margin suffices | Select when board area is limited and full 1500 W rating is not required; verify thermal derating on small pads |
| 1.5KE39CA | Through-hole TO-218 package, identical electrical specs (VWM, VC, PPPM), higher mounting robustness | Preferred for high-vibration environments (e.g., railway, heavy machinery) where SMT reliability is a concern | Choose for legacy through-hole designs or mechanically demanding deployments; requires PCB redesign |
Compared with SMBJ33CA and 1.5KE39CA, the 1.5SMC39CA-E3/57T uniquely balances 1500 W surge capability, SMC's automated assembly compatibility, and bidirectional symmetry - making it optimal for new industrial and automotive SMT designs requiring both high energy absorption and production scalability.
Availability
1.5SMC39CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial RS-485 interface hardening, and telecom line card surge suppression requiring stable component supply, RoHS-compliant sourcing, and consistent tape-and-reel delivery.
Supply support for 1.5SMC39CA-E3/57T 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.
The 1.5SMC Series targets high-energy transient suppression in compact SMT formats, engineered specifically for automotive-grade robustness, automated manufacturing, and compliance with IEC 61000-4-2/4-5 and AEC-Q101 standards.
FAQ
What does the "CA" suffix mean in 1.5SMC39CA-E3/57T?
The "CA" suffix in 1.5SMC39CA-E3/57T explicitly denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., 1.5SMC39A), the 1.5SMC39CA-E3/57T has no polarity marking and functions identically regardless of terminal orientation, making it ideal for AC-coupled or floating signal paths such as RS-485, CAN, or sensor bridge outputs.
Is 1.5SMC39CA-E3/57T AEC-Q101 qualified?
The base 1.5SMC39CA-E3/57T is RoHS-compliant and commercial-grade; however, Vishay offers AEC-Q101 qualified versions under ordering codes 1.5SMC39CAHE3_A and 1.5SMC39CAHM3_A (with revision suffixes). These variants undergo extended stress testing per AEC-Q101 and are designated for automotive applications - the 1.5SMC39CA-E3/57T itself is not qualified but shares identical die and packaging process, enabling straightforward qualification migration.
What is the clamping voltage of 1.5SMC39CA-E3/57T at its rated peak pulse current?
The 1.5SMC39CA-E3/57T clamps to a maximum of 53.9 V when subjected to its rated peak pulse current of 27.8 A under the standardized 10/1000 μs waveform. This value is measured per Figure 1 in Vishay Document 88303 and represents the worst-case voltage imposed on the protected circuit during surge events - critical for verifying compatibility with downstream IC absolute maximum ratings.
Can 1.5SMC39CA-E3/57T be used in place of a unidirectional TVS like 1.5SMC39A?
No - the 1.5SMC39CA-E3/57T is strictly bidirectional and must not replace unidirectional devices like 1.5SMC39A in DC-biased circuits (e.g., 5 V power rail protection), where cathode-anode polarity is essential for proper blocking. Substitution would result in unintended conduction during normal operation. Use 1.5SMC39CA-E3/57T only where symmetrical clamping is required, such as across differential pairs or AC signals.
What is the thermal resistance and recommended pad layout for 1.5SMC39CA-E3/57T?
The 1.5SMC39CA-E3/57T 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, as specified in Vishay Document 88303. Deviation from this pad size increases thermal impedance, reducing safe surge repetition rate and derating margin - especially critical in high-temperature ambient environments like automotive under-hood applications.
1.5SMC39CA-E3/57T 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:
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
1.5SMC39CA-E3/57T FAQ
1.How can I place an order for 1.5SMC39CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC39CA-E3/57T 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 1.5SMC39CA-E3/57T reliable?
The price and inventory of 1.5SMC39CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC39CA-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC39CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC39CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC39CA-E3/57T?
1.5SMC39CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC39CA-E3/57T 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 1.5SMC39CA-E3/57T?
For technical support, including 1.5SMC39CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC39CA-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC39CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC39CA-E3/57T 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 1.5SMC39CA-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC39CA-E3/57T?
All 1.5SMC39CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC39CA-E3/57T, 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 1.5SMC39CA-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC39CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC39CA-E3/57T Tags
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