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Vishay General Semiconductor - Diodes Division 1.5SMC43CA-E3/57T
- Part No.:
- 1.5SMC43CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43CA-E3/57T.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,357
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Product details
Overview
1.5SMC43CA-E3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 43 V standoff voltage (VWM), 48.5–53.6 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 μs), clamping voltage of 59.3 V at 25.3 A, and operates across –65 °C to +150 °C. It is used to protect automotive sensor interfaces and industrial I/O lines against lightning-induced transients and inductive switching spikes.
For engineers reviewing the 1.5SMC43CA-E3/57T datasheet, 1.5SMC43CA-E3/57T pinout, 1.5SMC43CA-E3/57T application, or 1.5SMC43CA-E3/57T equivalent, key selection considerations include bidirectional clamping capability, SMC (DO-214AB) package compatibility with automated placement, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and compliance with UL 497B for telecom and industrial protector classification.
Technical Context
The 1.5SMC43CA-E3/57T implements a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its symmetrical bidirectional structure enables identical clamping behavior in both polarities, eliminating polarity concerns in AC-coupled or floating signal paths.
It delivers 1500 W peak pulse power under standardized 10/1000 μs waveform conditions with 0.01% duty cycle, and is rated for 200 A non-repetitive forward surge current (8.3 ms half-sine) - applicable only to unidirectional variants; this part is bidirectional and thus excludes IFSM rating but retains full reverse surge capability per direction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 36.8 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 40.9–45.2 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | 59.3 V at 25.3 A - Peak voltage seen by protected circuit during 1500 W transient; critical for IC survivability |
| PPPM (Peak Pulse Power) | 1500 W - Sustains 10/1000 μs surges without degradation; validates robustness against lightning and load dump |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement; supports automated assembly and thermal dissipation |
| Operating Temperature | –65 °C to +150 °C - Enables deployment in under-hood automotive, industrial control, and outdoor telecom environments |
| Compliance | RoHS-compliant (E3 suffix), UL 497B recognized (QVGQ2), MSL Level 1 - Meets commercial reliability and safety standards for global production |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; flammability rating UL 94 V-0; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive polarity) | One terminal of symmetrical PN junction; conducts during positive surges relative to cathode reference |
| Cathode | Transient current entry (negative polarity) | Second terminal of symmetrical junction; conducts during negative surges - functionally identical to anode in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against severe lightning-induced surges (IEC 61000-4-5 Level 4) without derating on standard PCB layouts |
| Bidirectional clamping symmetry | Eliminates need for polarity-aware layout; supports AC signal lines, differential buses, and floating grounds without orientation constraints |
| Low clamping ratio (VC/VBR ≈ 1.3) | Minimizes overvoltage stress on downstream components - e.g., 59.3 V clamp protects 48 V-rated CAN transceivers or RS-485 drivers |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow assembly without moisture sensitivity concerns or baking requirements |
| UL 497B recognition (QVGQ2) | Validates suitability for telecom line interface protection per industry safety standard - reduces certification effort for end equipment |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting 5 V or 12 V sensor signal lines (e.g., pressure, temperature) in engine control units from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and ground to clamp transients before reaching ADC front-end or signal conditioner IC. Use Value: With 36.8 V VWM and 59.3 V VC, it safeguards 12 V systems while allowing normal operation up to 36.8 V and limiting fault voltage to safe levels for 3.3 V/5 V logic. |
Use Scenario: Shielding 4–20 mA current loop inputs in programmable logic controllers from ESD and field wiring surges. IC Role / Device Role / Timing Role: Placed across input terminals to shunt induced common-mode transients before they reach precision op-amps or isolators. Use Value: Symmetrical clamping ensures equal protection regardless of surge polarity; 1500 W rating handles repetitive switching noise in factory-floor environments. |
| Telecom Line Interface Protection | Consumer Power Adapter Surge Suppression |
Use Scenario: Secondary-side protection on Ethernet PHY or DSL line drivers exposed to induced surges from nearby power cables or lightning coupling. IC Role / Device Role / Timing Role: Fast-response TVS connected between differential pair and chassis ground to suppress common-mode transients without distorting high-speed signals. Use Value: Low junction capacitance (typ. <100 pF at 0 V) minimizes signal integrity impact on 10/100BASE-TX; UL 497B recognition simplifies regulatory approval. |
Use Scenario: Input-stage surge suppression in wall-mounted AC/DC adapters for smart home devices subjected to mains-borne transients. IC Role / Device Role / Timing Role: Mounted across primary-side DC bus (post-bridge rectifier) to clamp voltage spikes before they stress bulk capacitor or controller IC. Use Value: 1500 W rating absorbs energy from 1.2/50 μs surges per IEC 61000-4-5; RoHS/E3 compliance meets global environmental requirements for consumer goods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ43CA | Lower peak power (600 W), same VWM/VC range, SMB (DO-214AA) package - 30% smaller footprint, higher thermal resistance (RθJA = 110 °C/W) | Suitable for space-constrained consumer electronics where 600 W surge immunity suffices; not recommended for automotive or industrial 1500 W requirements | Select when board area is critical and surge threat level is moderate (e.g., USB ports, low-power sensors) |
| 1.5KE43CA | Same electrical specs but axial-leaded DO-15 package - incompatible with SMT assembly; higher mounting inductance limits high-frequency transient response | Used in legacy through-hole designs or prototyping; lacks MSL Level 1 rating and automated placement support | Choose only for hand-soldered repairs or non-SMT legacy systems; avoid for new SMT production |
Compared with SMBJ43CA and 1.5KE43CA, the 1.5SMC43CA-E3/57T uniquely balances 1500 W surge handling, SMT manufacturability, and automotive-grade thermal performance in the compact SMC outline - making it the preferred choice for volume production of ruggedized electronics requiring certified, high-power transient protection.
Availability
1.5SMC43CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, telecom line interfaces, and consumer power adapter designs requiring stable component supply, RoHS compliance, and UL-recognized surge protection.
Supply support for 1.5SMC43CA-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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power handling, and application-specific optimization.
The 1.5SMC Series was developed to deliver high-power, surface-mount transient suppression for automotive, industrial, and telecom applications where automated assembly, AEC-Q101 qualification, and UL safety recognition are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC43CA-E3/57T under maximum rated surge current?
The 1.5SMC43CA-E3/57T has a maximum clamping voltage (VC) of 59.3 V at 25.3 A peak pulse current, measured using the standardized 10/1000 μs waveform. This value is specified in the Vishay datasheet (Document Number: 88303, page 2) and represents the upper voltage limit imposed on protected circuitry during worst-case transient events. The 1.5SMC43CA-E3/57T maintains this clamping performance across its full operating temperature range.
Is the 1.5SMC43CA-E3/57T qualified for automotive applications?
The base 1.5SMC43CA-E3/57T is RoHS-compliant and commercial-grade; however, Vishay offers AEC-Q101-qualified versions under ordering codes such as 1.5SMC43CAHE3_A/H. The 1.5SMC43CA-E3/57T itself is not AEC-Q101 qualified, but shares identical electrical characteristics and SMC package construction with qualified variants - enabling drop-in qualification upgrades via manufacturer-controlled revision codes.
What does the "CA" suffix indicate in 1.5SMC43CA-E3/57T?
The "CA" suffix in 1.5SMC43CA-E3/57T denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional "A" variants, the 1.5SMC43CA-E3/57T has no cathode band marking and functions identically in either polarity, making it ideal for AC-coupled, differential, or floating signal paths where polarity cannot be guaranteed.
What is the thermal resistance of the 1.5SMC43CA-E3/57T, and how does it affect PCB layout?
The 1.5SMC43CA-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. This value assumes minimum recommended pad layout per Vishay's mechanical drawings. To maintain reliability under repeated surges, PCB layout must allocate sufficient copper area and avoid thermal bottlenecks - undersized pads increase junction temperature and reduce surge endurance. The 1.5SMC43CA-E3/57T's RθJA directly impacts its ability to dissipate 6.5 W steady-state power.
Does the 1.5SMC43CA-E3/57T meet UL safety standards?
Yes - the 1.5SMC43CA-E3/57T is Underwriters Laboratories (UL) recognized under standard UL 497B for protectors, with file number E136766. This applies to both unidirectional and bidirectional devices in the 1.5SMC Series. UL recognition confirms compliance for use in telecom, industrial, and consumer equipment requiring certified overvoltage protection. The 1.5SMC43CA-E3/57T carries this qualification as part of the series-level listing.
1.5SMC43CA-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):
- 36.8V
- Voltage - Breakdown (Min):
- 40.9V
- Voltage - Clamping (Max) @ Ipp:
- 59.3V
- Current - Peak Pulse (10/1000µs):
- 25.3A
- 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)
1.5SMC43CA-E3/57T FAQ
1.How can I place an order for 1.5SMC43CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43CA-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 1.5SMC43CA-E3/57T reliable?
The price and inventory of 1.5SMC43CA-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 1.5SMC43CA-E3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC43CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43CA-E3/57T?
1.5SMC43CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43CA-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 1.5SMC43CA-E3/57T?
For technical support, including 1.5SMC43CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43CA-E3/57T requirements.
6.How does Aetrix verify that 1.5SMC43CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43CA-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 1.5SMC43CA-E3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC43CA-E3/57T?
All 1.5SMC43CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43CA-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 1.5SMC43CA-E3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC43CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43CA-E3/57T Tags
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