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Vishay General Semiconductor - Diodes Division 1.5SMC43CA-M3/57T
- Part No.:
- 1.5SMC43CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC43CA-M3/57T.pdf
- Description:
- TVS DIODE 36.8VWM 59.3VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,010
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Product details
Overview
1.5SMC43CA-M3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 36.8 V standoff voltage (VWM), 40.9–45.2 V breakdown voltage (VBR) at 1 mA, 59.3 V maximum clamping voltage (VC) at 25.3 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the 1.5SMC43CA-M3/57T datasheet, 1.5SMC43CA-M3/57T pinout, 1.5SMC43CA-M3/57T application, or 1.5SMC43CA-M3/57T equivalent, key selection criteria include bidirectional clamping capability, SMC (DO-214AB) package compatibility, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), and halogen-free RoHS compliance per M3 suffix.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance regardless of transient polarity - critical for AC-coupled or floating signal paths. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and fast response time (<1.0 ns), while low incremental surge resistance enables effective energy diversion during lightning-induced surges or inductive switching events.
The device is rated for repetitive 10/1000 µs transients at 0.01% duty cycle and derates linearly above 25 °C ambient, with maximum junction temperature of +150 °C. Mounting on 8.0 mm × 8.0 mm copper pads is required to sustain full 1500 W pulse rating per JEDEC test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 36.8 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown) | 40.9–45.2 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage |
| VC (Clamping) | 59.3 V at 25.3 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines safe IC survival margin |
| PPPM | 1500 W - Peak transient power dissipation capability; validates suitability for IEC 61000-4-5 Level 4 testing |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; requires ≥8 mm² copper pad per terminal for full power rating |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline; compatible with automated pick-and-place and reflow |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix); meets JESD201 Class 2 whisker resistance and MSL Level 1 |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional operation; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No polarity marking; either terminal serves as anode or cathode depending on transient direction - enables placement without orientation check |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Validated for IEC 61000-4-5 surge immunity up to 4 kV (line-earth) with proper PCB layout |
| Low clamping ratio (VC/VBR ≈ 1.36) | Minimizes let-through voltage stress on downstream MOSFETs or interface ICs during transients |
| Fast response time (<1 ns) | Engages before sensitive logic or analog circuitry sustains damage from ESD or fast-rising spikes |
| AEC-Q101 qualified option available | Supports automotive-grade reliability requirements when ordered with HE3/HM3 suffix variants |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance mandates for industrial and consumer end equipment |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and MEMS sensor signal lines from load-dump and jump-start induced transients in engine control units. IC Role / Device Role: Bidirectional clamping element placed across differential or single-ended sensor outputs prior to ADC input. Use Value: Maintains signal integrity under ±50 V transients while limiting voltage to ≤59.3 V - preserving 12-bit ADC accuracy and preventing latch-up in microcontrollers. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers against field wiring faults and EFT bursts. IC Role / Device Role: Primary surge shunt mounted at terminal block entry point, upstream of precision op-amp conditioning stage. Use Value: Clamps 1 kV/500 A surges to <60 V within nanoseconds, avoiding op-amp saturation and enabling uninterrupted process monitoring. |
| Telecom Line Card Protection | Consumer USB Power Delivery Port |
Use Scenario: Shielding Ethernet PHY magnetics and PoE injectors from lightning-induced common-mode surges on outdoor cabling. IC Role / Device Role: Common-mode TVS pair across transformer center taps and data lines in IEEE 802.3af/at compliant designs. Use Value: Symmetric 36.8 V standoff allows operation across 48 V PoE rails while clamping 6 kV surges to safe levels for PHY ICs. |
Use Scenario: Secondary-level overvoltage protection on USB-C VBUS lines after primary buck converter, guarding against adapter fault conditions. IC Role / Device Role: Bidirectional clamp between VBUS and ground, sized to absorb 100 V/1 A faults without thermal runaway. Use Value: Halogen-free M3 construction supports global regulatory acceptance; 59.3 V clamping prevents damage to USB PD controller and port switches. |
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, SMB (DO-214AA) package - 30% smaller footprint, higher RθJA (110 °C/W) | Suitable only for lower-energy transients (IEC 61000-4-2 Level 3); not recommended for 10/1000 µs lightning surges | Select SMBJ43CA only when board space is constrained and surge threat level is limited to ESD or capacitive coupling. |
| 1.5KE43CA | Through-hole TO-204AA (DO-15) package, identical electrical specs but 2× higher RθJA (150 °C/W); lead-free finish only | Requires wave soldering; unsuitable for high-density SMT assemblies or automated production lines | Choose 1.5KE43CA only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ43CA and 1.5KE43CA, the 1.5SMC43CA-M3/57T delivers optimal balance of 1500 W surge capacity, SMT manufacturability, and thermal performance - making it the preferred choice for volume automotive and industrial applications requiring AEC-Q101 alignment and halogen-free compliance.
Availability
1.5SMC43CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, and telecom line card protection requiring stable component supply, halogen-free compliance, and AEC-Q101-qualified alternatives.
Supply support for 1.5SMC43CA-M3/57T 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, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The 1.5SMC Series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against lightning, load dump, and EFT is non-negotiable.
FAQ
What does the "CA" suffix indicate in 1.5SMC43CA-M3/57T?
The "CA" suffix in 1.5SMC43CA-M3/57T denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional "A" variants, the CA version has no polarity marking and functions identically regardless of voltage polarity, making it ideal for AC signal lines, differential buses, and floating grounds where transient direction is unpredictable. This is confirmed in Vishay's 1.5SMC series documentation under "DEVICES FOR BIDIRECTION APPLICATIONS".
Is 1.5SMC43CA-M3/57T AEC-Q101 qualified?
No - the 1.5SMC43CA-M3/57T is not AEC-Q101 qualified. The M3 suffix indicates halogen-free and RoHS-compliant commercial-grade construction. AEC-Q101 qualification requires the HM3 suffix with revision code (e.g., 1.5SMC43CAHM3_A/H), as specified in the Vishay ordering table and mechanical data section. For automotive applications demanding AEC-Q101 validation, engineers must select the HM3 variant, not the M3 version of 1.5SMC43CA-M3/57T.
What is the maximum clamping voltage of 1.5SMC43CA-M3/57T and at what current is it measured?
The maximum clamping voltage (VC) of 1.5SMC43CA-M3/57T is 59.3 V, measured at a peak pulse current (IPPM) of 25.3 A using the standard 10/1000 µs double-exponential waveform. This value is extracted directly from the "ELECTRICAL CHARACTERISTICS" table in the Vishay 1.5SMC datasheet (Document Number: 88303), row for part number (+)1.5SMC43A, which applies identically to the CA variant per series-wide specifications.
Can 1.5SMC43CA-M3/57T be used in place of a unidirectional TVS like 1.5SMC43A-M3/57T?
Yes - 1.5SMC43CA-M3/57T can replace unidirectional 1.5SMC43A-M3/57T in most applications, but with trade-offs. Both share identical VWM, VBR, VC, and PPPM ratings, but the CA version lacks polarity marking and conducts in both directions. In DC-biased circuits where reverse conduction would cause malfunction (e.g., power rail clamping), the unidirectional variant remains mandatory. For AC, differential, or floating nodes, 1.5SMC43CA-M3/57T offers greater design flexibility and simplified layout.
What PCB layout guidance applies to 1.5SMC43CA-M3/57T to achieve its rated 1500 W pulse power?
To achieve the full 1500 W peak pulse power rating, 1.5SMC43CA-M3/57T must be mounted on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as defined in Vishay's "MAXIMUM RATINGS" note (2). Smaller pads increase thermal impedance and reduce surge capability - e.g., a 25 mm² pad may limit sustained pulse handling to ~900 W. Trace width should exceed 1.5 mm, and ground/power planes must be solid beneath the pads to maximize heat spreading and minimize inductance during fast transients.
1.5SMC43CA-M3/57T 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-M3/57T FAQ
1.How can I place an order for 1.5SMC43CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC43CA-M3/57T 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-M3/57T reliable?
The price and inventory of 1.5SMC43CA-M3/57T 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-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC43CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC43CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC43CA-M3/57T?
1.5SMC43CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC43CA-M3/57T 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-M3/57T?
For technical support, including 1.5SMC43CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC43CA-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC43CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC43CA-M3/57T 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-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC43CA-M3/57T?
All 1.5SMC43CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC43CA-M3/57T, 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-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC43CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC43CA-M3/57T Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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