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Vishay General Semiconductor - Diodes Division 1.5SMC47CA-M3/57T
- Part No.:
- 1.5SMC47CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC47CA-M3/57T.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC SMC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
1.5SMC47CA-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 47 V standoff voltage (VWM), 64.8 V maximum clamping voltage (VC) at 23.1 A peak pulse current, and 1500 W peak pulse power capability with a 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the 1.5SMC47CA-M3/57T datasheet, 1.5SMC47CA-M3/57T pinout, 1.5SMC47CA-M3/57T application, or 1.5SMC47CA-M3/57T equivalent, key selection criteria include bidirectional clamping symmetry, low incremental surge resistance, MSL Level 1 moisture sensitivity, halogen-free RoHS compliance (M3 suffix), and AEC-Q101 qualification readiness via HM3 variants.
Technical Context
This device operates as a voltage-clamped crowbar during transient events: when reverse (or forward, in bidirectional mode) voltage exceeds the breakdown threshold (~49.4 V min / ~44.7 V max at 1 mA), it avalanches to limit downstream voltage to ≤64.8 V at 23.1 A. Its glass-passivated junction ensures stable breakdown and fast response (<1 ns).
Thermally, it sustains 150 °C maximum junction temperature with 75 °C/W junction-to-ambient thermal resistance (RθJA) on standard 8.0 mm × 8.0 mm copper pads. The SMC (DO-214AB) package supports automated placement and meets UL 94 V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 40.2 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping. |
| VBR (Breakdown) | 44.7–49.4 V at 1 mA - Verified avalanche onset range; ensures consistent triggering across production lots. |
| VC (Clamping) | 64.8 V at 23.1 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; critical for IC survival. |
| PPPM | 1500 W - Surge energy handling capacity; enables protection against lightning-induced transients per IEC 61000-4-5. |
| IPPM | 23.1 A - Peak pulse current supported without degradation; determines minimum series impedance required. |
| TJ max | +150 °C - Maximum junction temperature; sets thermal derating limits for high-duty-cycle applications. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 7.75 mm × 6.22 mm footprint; compatible with IPC-7351B land patterns. |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional operation; meets J-STD-002 solderability and JESD22-B102 whisker resistance Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical with cathode in bidirectional mode | Enables identical clamping behavior for positive and negative transients - no polarity orientation required during placement. |
| Cathode | Current exit terminal in forward bias; symmetrical with anode in bidirectional mode | Paired with anode to form a back-to-back diode structure; eliminates need for directional PCB layout verification. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM performance for ± polarity surges - simplifies protection design for AC-coupled or floating lines. |
| 1500 W peak pulse power | Withstands 10/1000 µs transients up to 23.1 A - meets IEC 61000-4-5 Level 4 (4 kV) requirements when properly decoupled. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during clamping - preserves margin for 3.3 V/5 V logic and automotive MCU I/O rails. |
| Halogen-free & RoHS-compliant (M3) | Complies with JEDEC JS709E and IPC-1752A material declarations - supports green manufacturing and export compliance. |
| MSL Level 1 (260 °C peak) | Zero floor life limitation - allows indefinite storage and standard reflow without baking or special handling. |
Applications
| Automotive Sensor Interface | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus nodes and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in 12 V/24 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching signal conditioning ICs or microcontrollers. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 1/2/5a stress while enabling AEC-Q101-qualified system certification with HM3 variants. |
Use Scenario: Safeguarding 24 V DC digital input channels on programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary transient suppressor mounted adjacent to terminal block to absorb >1 kV ring waves per IEC 61000-4-4. Use Value: Limits input voltage to <65 V during 1500 W surges, preventing damage to optocoupler input stages and enabling >100,000 cycle reliability. |
| Telecom Line Card Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding Ethernet PHYs, PoE injectors, and DSL line drivers from lightning-induced common-mode surges on twisted-pair cables. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), clamping residual transients to safe levels for silicon front-end. Use Value: Achieves <1 ns response time and <65 V clamping to protect 100BASE-TX transformers rated for 75 V isolation. |
Use Scenario: Suppressing commutation spikes from brushed DC motors and solenoids in washing machines, HVAC actuators, and power tools. IC Role / Device Role / Timing Role: Snubber element across motor terminals or MOSFET drain-source to prevent dv/dt-induced shoot-through and gate oxide stress. Use Value: Handles repetitive 1500 W pulses at 0.01% duty cycle - extends MOSFET lifetime and eliminates need for external RC snubbers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47CA | Same VWM/VC specs but lower PPPM (600 W); SMB package (smaller footprint, higher RθJA = 85 °C/W) | Limited to lower-energy transients (e.g., ESD-only); unsuitable for IEC 61000-4-5 Level 3+ or lightning surges | Select when board space is constrained and surge threat level is limited to contact ESD (IEC 61000-4-2) or low-energy switching noise. |
| 1.5KE47CA | Same electrical specs but axial-leaded DO-201 package; higher mounting thermal resistance; not SMT-compatible | Requires through-hole assembly; incompatible with automated pick-and-place; less suitable for high-density layouts | Choose only for legacy repair, prototyping with breadboards, or cost-sensitive non-automated production where SMT is unavailable. |
Compared with SMBJ47CA and 1.5KE47CA, the 1.5SMC47CA-M3/57T delivers optimal balance of high-energy surge handling (1500 W), SMT manufacturability, and halogen-free compliance - making it the preferred choice for new automotive and industrial designs requiring AEC-Q101 scalability and IPC-compliant assembly.
Availability
1.5SMC47CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC inputs, telecom line cards, and consumer appliance motor control requiring stable component supply, long-term lifecycle support, and halogen-free compliance.
Supply support for 1.5SMC47CA-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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and automotive-grade qualification.
The 1.5SMC Series was engineered specifically for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, repeatability, and AEC-Q101 readiness are mandatory.
FAQ
What is the clamping voltage of the 1.5SMC47CA-M3/57T under a 10/1000 µs surge?
The 1.5SMC47CA-M3/57T clamps to a maximum of 64.8 V when subjected to its rated 23.1 A peak pulse current with a 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and is measured per Fig. 1 and Fig. 3 in Vishay document 88303. The clamping voltage directly determines the maximum stress imposed on downstream components during transient events.
Is the 1.5SMC47CA-M3/57T suitable for automotive applications?
Yes - the 1.5SMC47CA-M3/57T is halogen-free and RoHS-compliant (M3 suffix), and belongs to the AEC-Q101-qualified 1.5SMC family. While the base M3 variant is commercial-grade, the HM3 suffix (e.g., 1.5SMC47CAHM3_A/H) denotes full AEC-Q101 qualification. Engineers designing to automotive standards should specify HM3 versions for production, but the 1.5SMC47CA-M3/57T shares identical electrical and mechanical characteristics.
What does the "CA" suffix indicate in 1.5SMC47CA-M3/57T?
The "CA" suffix in 1.5SMC47CA-M3/57T explicitly denotes a bidirectional configuration. Unlike unidirectional "A" parts, CA devices feature symmetrical avalanche characteristics in both polarities - meaning they provide identical breakdown voltage (44.7–49.4 V), clamping voltage (64.8 V), and peak pulse current (23.1 A) for positive and negative transients. No polarity marking is present on the SMC package.
What is the thermal resistance of the 1.5SMC47CA-M3/57T?
The 1.5SMC47CA-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 8.0 mm × 8.0 mm copper pads per Vishay document 88303. Its junction-to-lead resistance (RθJL) is 15 °C/W. These values define thermal derating curves in Fig. 2 and must be applied when estimating safe operating area under repetitive surge conditions or elevated ambient temperatures.
Does the 1.5SMC47CA-M3/57T require a heatsink for standard operation?
No - the 1.5SMC47CA-M3/57T is designed for surface-mount operation without external heatsinking under normal transient conditions. Its 75 °C/W RθJA assumes standard PCB copper pad layout (0.31″ × 0.31″). Heatsinking is unnecessary for single-event surges, but thermal management becomes critical only under high-repetition-rate or sustained overvoltage conditions exceeding its 6.5 W steady-state power dissipation rating.
1.5SMC47CA-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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 23.1A
- 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)
1.5SMC47CA-M3/57T FAQ
1.How can I place an order for 1.5SMC47CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC47CA-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 1.5SMC47CA-M3/57T reliable?
The price and inventory of 1.5SMC47CA-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 1.5SMC47CA-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC47CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC47CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC47CA-M3/57T?
1.5SMC47CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC47CA-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 1.5SMC47CA-M3/57T?
For technical support, including 1.5SMC47CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC47CA-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC47CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC47CA-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 1.5SMC47CA-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC47CA-M3/57T?
All 1.5SMC47CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC47CA-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 1.5SMC47CA-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC47CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC47CA-M3/57T Tags
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