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Vishay General Semiconductor - Diodes Division 1.5SMC18CA-M3/57T
- Part No.:
- 1.5SMC18CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC18CA-M3/57T.pdf
- Description:
- TVS DIODE 15.3VWM 25.2VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,106
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Product details
Overview
1.5SMC18CA-M3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on signal or power lines. It features a 1500 W peak pulse power rating (10/1000 μs), 18 V breakdown voltage (VBR min/max = 17.1–18.9 V at 1 mA), and clamps to ≤25.2 V at 59.5 A peak pulse current - used in automotive sensor interface protection and industrial I/O line surge suppression.
For engineers reviewing the 1.5SMC18CA-M3/57T datasheet, 1.5SMC18CA-M3/57T pinout, 1.5SMC18CA-M3/57T application, or 1.5SMC18CA-M3/57T equivalent, key selection criteria include bidirectional clamping capability, 1500 W surge rating, SMC package thermal performance (RθJA = 75 °C/W), low leakage (<1 μA at 15.3 V), and halogen-free RoHS compliance per M3 suffix.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and fast response time (<1 ns), while the SMC package supports automated placement and meets J-STD-020 MSL level 1 (260 °C peak reflow).
The device is rated for repetitive 10/1000 μs surges at 0.01% duty cycle, derated above 25 °C per Fig. 2, and delivers 25.2 V clamping voltage at 59.5 A IPPM - enabling robust protection of 3.3 V/5 V/12 V interfaces without latch-up or degradation under transient stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 17.1 V / 18.9 V at 1 mA - defines precise breakdown threshold for reliable clamping onset |
| VWM | 15.3 V - maximum continuous reverse operating voltage before significant leakage |
| IPPM | 59.5 A (10/1000 μs) - peak surge current it safely shunts without failure |
| VC | 25.2 V at IPPM - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 1500 W - peak pulse power handling capacity under standard waveform |
| ID @ VWM | <1 μA - ultra-low leakage preserves signal integrity in high-impedance circuits |
| TJ max | +150 °C - enables operation in under-hood automotive and industrial environments |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant (M3 suffix), matte tin-plated leads, 0.220–0.246 inch body width, 0.305–0.320 inch length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; symmetrical with cathode in bidirectional mode | No polarity marking - terminals are functionally identical for transient suppression in either direction |
| Cathode | Current exit terminal in forward bias; symmetrical with anode in bidirectional mode | Unmarked device - bidirectional operation eliminates need for orientation-dependent layout |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables single-device protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V lines |
| Bidirectional clamping symmetry | Eliminates polarity concerns in AC-coupled or floating signal paths like CAN, RS-485, or sensor bridges |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio suppressors |
| MSL level 1 moisture sensitivity | Allows direct placement without baking; compatible with standard SMT reflow profiles up to 260 °C |
| Halogen-free & RoHS-compliant (M3) | Fulfills environmental compliance requirements for automotive and industrial end-equipment certifications |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting temperature, pressure, or position sensor outputs from load-dump and ISO 7637-2 transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to clamp ±200 V spikes before signal conditioning amplifier. Use Value: Prevents amplifier saturation or latch-up during engine cranking or alternator field collapse events. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to EFT and surge noise in factory floors. IC Role / Device Role / Timing Role: Primary transient suppressor across input terminals, working with series current-limiting resistor and filter capacitor. Use Value: Maintains loop accuracy by limiting voltage excursion to <25.2 V, avoiding ADC saturation or op-amp rail-to-rail clipping. |
| Telecom Line Card Protection | Consumer USB Port ESD/Surge |
Use Scenario: Shielding Ethernet PHY or xDSL line drivers from lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: First-stage protector before gas discharge tube (GDT) or polymer PTC, absorbing initial 1500 W energy burst. Use Value: Reduces GDT follow-on current stress and extends system-level surge immunity beyond IEC 61000-4-5 10/700 μs test limits. |
Use Scenario: Adding secondary surge protection to USB 2.0 data lines (D+/D−) alongside integrated ESD diodes in portable devices. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed after common-mode choke to handle high-energy ESD and cable discharge events. Use Value: Clamps differential surges to <25.2 V without distorting 480 Mbps data eye due to absence of polarity marking or asymmetry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18CA | Same VBR range (17.1–18.9 V) but lower PPPM = 600 W; SMB package (smaller footprint, higher RθJA = 90 °C/W) | Limited to lower-energy transients (IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 surge on power rails | Select when board space is constrained and surge threat level is limited to ESD or low-duty-cycle switching noise. |
| 1.5KE18CA | Same VBR and PPPM, but axial DO-15 package - larger size, manual assembly, higher inductance, no MSL level 1 rating | Not suitable for high-speed automated production or dense PCB layouts; less reliable in reflow-soldered assemblies | Choose only for legacy through-hole designs or prototyping where SMT compatibility is not required. |
Compared with SMBJ18CA and 1.5KE18CA, the 1.5SMC18CA-M3/57T uniquely balances 1500 W surge capability, SMC's automated manufacturability, MSL level 1 reliability, and halogen-free compliance - making it the preferred choice for volume automotive and industrial SMT production.
Availability
1.5SMC18CA-M3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, telecom line cards, and consumer USB port protection requiring stable component supply and full traceability.
Supply support for 1.5SMC18CA-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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The 1.5SMC Series was developed for high-power, surface-mount transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where 1500 W surge handling and AEC-Q101 readiness are critical.
FAQ
What is the breakdown voltage tolerance of the 1.5SMC18CA-M3/57T?
The 1.5SMC18CA-M3/57T has a specified breakdown voltage range of 17.1 V to 18.9 V at 1 mA test current, representing a ±5.6% tolerance about the nominal 18 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports predictable circuit protection design without margin over-engineering.
Is the 1.5SMC18CA-M3/57T suitable for automotive applications?
Yes, the 1.5SMC18CA-M3/57T is halogen-free and RoHS-compliant (M3 suffix), and the base 1.5SMC18CA family is AEC-Q101 qualified when ordered with HE3 or HM3 suffixes. While the -M3/57T variant itself is commercial-grade, its construction, thermal rating (TJ max = +150 °C), and robust surge performance make it widely deployed in non-safety-critical automotive subsystems such as body control modules and infotainment interfaces.
How does the clamping voltage of the 1.5SMC18CA-M3/57T compare to its standoff voltage?
The 1.5SMC18CA-M3/57T has a standoff voltage VWM of 15.3 V and clamps to 25.2 V at its rated peak pulse current of 59.5 A. This 9.9 V headroom allows safe operation of downstream 16 V-rated components while maintaining low leakage (<1 μA) during normal operation - a critical balance for protecting sensitive analog front-ends without DC loading.
What is the thermal resistance of the 1.5SMC18CA-M3/57T in standard mounting conditions?
The 1.5SMC18CA-M3/57T 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 JEDEC-standard PCB layout; reducing pad area or omitting thermal vias increases RθJA, directly impacting power derating above 25 °C ambient per Figure 2 in the datasheet.
Does the 1.5SMC18CA-M3/57T require polarity-aware PCB layout?
No - the 1.5SMC18CA-M3/57T is a bidirectional TVS diode with symmetrical electrical characteristics in both directions, and carries no cathode band or polarity marking. Its terminals are interchangeable in layout, simplifying routing for differential signals, AC-coupled lines, or floating grounds where polarity reversal is possible during fault conditions.
1.5SMC18CA-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):
- 15.3V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 25.2V
- Current - Peak Pulse (10/1000µs):
- 59.5A
- 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)
1.5SMC18CA-M3/57T FAQ
1.How can I place an order for 1.5SMC18CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC18CA-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 1.5SMC18CA-M3/57T reliable?
The price and inventory of 1.5SMC18CA-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 1.5SMC18CA-M3/57T is usually 5 days.
3.What payment methods are accepted for 1.5SMC18CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC18CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC18CA-M3/57T?
1.5SMC18CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC18CA-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 1.5SMC18CA-M3/57T?
For technical support, including 1.5SMC18CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC18CA-M3/57T requirements.
6.How does Aetrix verify that 1.5SMC18CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All 1.5SMC18CA-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 1.5SMC18CA-M3/57T meets industry standards.
7.What is the process for return or replacement of 1.5SMC18CA-M3/57T?
All 1.5SMC18CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC18CA-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 1.5SMC18CA-M3/57T part is unused and in its original packaging.
Return procedure for 1.5SMC18CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC18CA-M3/57T Tags
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