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Vishay General Semiconductor - Diodes Division 3.0C18CA-M3/H
- Part No.:
- 3.0C18CA-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3.0C18CA-M3/H.pdf
- Description:
- 3KW, 18V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,081
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Product details
Overview
3.0C18CA-M3 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 3000 W peak pulse power (10/1000 μs), 20.0–22.1 V breakdown voltage, and 29.2 V clamping voltage at 103 A. It protects MOSFETs, ICs, and sensor signal lines in industrial and telecom power supplies.
For engineers reviewing the 3.0C18CA-M3 datasheet, 3.0C18CA-M3 pinout, 3.0C18CA-M3 application, or 3.0C18CA-M3 equivalent, key selection criteria include clamping voltage vs. standoff voltage margin, bidirectional ESD immunity (30 kV HBM), thermal resistance (RthJA = 90 °C/W), and MSL Level 1 reflow compatibility.
Technical Context
This TVS operates as a voltage-clamped crowbar device triggered by transient overvoltage events, leveraging avalanche breakdown to shunt surge current away from protected circuitry. Its bidirectional symmetry enables use on AC lines or differential signal paths without polarity concerns.
It delivers 30 kW peak pulse power under 8/20 μs waveform and meets IEC 61000-4-2 (30 kV contact/air discharge), supporting robust system-level EMC compliance. The SMC package provides low thermal resistance (RthJM = 4.0 °C/W) for sustained surge handling up to 175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 20.0–22.1 V at 1.0 mA test current - defines minimum voltage at which avalanche conduction begins, ensuring reliable triggering above normal operating voltage. |
| Stand-off Voltage VWM | 18 V - maximum continuous reverse working voltage before leakage exceeds 2.0 μA, setting safe operating margin below VBR. |
| Clamping Voltage VC | 29.2 V at 103 A (10/1000 μs) - actual voltage seen by protected circuit during worst-case surge, critical for downstream component survivability. |
| Peak Pulse Power PPPM | 3000 W (10/1000 μs) - energy-handling capability defining surge robustness; derates linearly above 25 °C ambient. |
| Junction Temperature Range | −55 °C to +175 °C - enables deployment in harsh environments including automotive under-hood and industrial motor drives. |
| ESD Immunity | 30 kV per IEC 61000-4-2 (HBM contact/air) - eliminates need for additional discrete ESD protection on exposed interfaces. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, MSL Level 1, matte tin-plated leads. Dimensions: 7.11 × 6.22 × 2.62 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Surge current sink node | Bidirectional design means no functional cathode/anode distinction; terminals are symmetric and interchangeable in layout. |
| Anode (unmarked end) | Surge current source node | Same physical terminal as cathode due to bidirectional construction; polarity marking omitted per spec note. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential lines (e.g., RS-485, CAN bus) without polarity constraints. |
| Low incremental surge resistance | Minimizes VC rise under high di/dt transients, improving clamping precision and reducing stress on downstream FETs or ICs. |
| Fast response time | Sub-nanosecond turn-on ensures suppression occurs before sensitive logic or analog circuits experience overvoltage damage. |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and telecom equipment without additional flame-retardant enclosures. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and current-sense amplifiers against inductive kickback from IGBT/MOSFET switching. IC Role / Device Role / Timing Role: Crowbar-type transient suppressor placed across DC bus or gate-source nodes. Use Value: Limits voltage spikes to ≤29.2 V, preventing gate oxide rupture in 30 V-rated MOSFETs and maintaining ADC accuracy under surge conditions. |
Use Scenario: Input-stage surge protection on −48 V telecom rectifier outputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary line-referenced TVS clamp on secondary-side DC distribution rails. Use Value: Absorbs 3000 W pulses without degradation, preserving hold-up capacitor integrity and avoiding brownout resets during 8/20 μs grid transients. |
| Automotive Body Control Modules | Consumer Sensor Interfaces |
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O pins against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS on signal lines between MCU and external sensors/actuators. Use Value: Withstands 30 kV ESD and 100 V/50 ms load dump transients while maintaining <2 μA leakage at 18 V, minimizing sleep-current impact. |
Use Scenario: ESD hardening of I²C/SPI lines connecting MEMS accelerometers and host processors in portable devices. IC Role / Device Role / Timing Role: Localized point-of-entry protection adjacent to connector or sensor footprint. Use Value: Clamps 8 kV contact ESD events to <30 V within 1 ns, preventing latch-up in 1.8 V I/O cells and eliminating firmware lockups. |
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 | Lower PPPM (600 W), higher VC (29.2 V @ 21.2 A), SMB package (smaller footprint, higher RthJA = 110 °C/W) | Suitable only for lower-energy transients; not recommended for 3000 W IEC 61000-4-5 compliance. | Select when space-constrained layouts prioritize footprint over surge rating. |
| SMCJ18A | Unidirectional version; same VBR/VC but requires correct polarity placement; identical SMC package and thermal performance. | Requires polarity-aware routing; unsuitable for AC or differential signals without external diode pairing. | Choose only for DC-biased lines where unidirectional clamping suffices and board layout allows orientation control. |
Compared with SMBJ18CA and SMCJ18A, the 3.0C18CA-M3 uniquely combines 3000 W rating, bidirectional operation, and SMC thermal performance-enabling single-device protection of high-energy AC-coupled interfaces without polarity constraints or derating penalties.
Availability
3.0C18CA-M3 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control modules requiring stable component supply and long-term obsolescence management.
Supply support for 3.0C18CA-M3 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, and passive components for demanding industrial and automotive applications.
The 3.0C18CA-M3 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power transient suppression in power conversion, communications infrastructure, and harsh-environment electronics.
FAQ
What is the clamping voltage of the 3.0C18CA-M3 under a 10/1000 μs surge?
The 3.0C18CA-M3 clamps to 29.2 V at 103 A under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 standards and represents the maximum voltage imposed on protected circuitry during worst-case surge events. The 3.0C18CA-M3 maintains this clamping performance across its full operating temperature range, enabling predictable protection design without derating for ambient conditions.
Is the 3.0C18CA-M3 suitable for bidirectional signal line protection?
Yes, the 3.0C18CA-M3 is explicitly bidirectional and requires no polarity marking, making it ideal for protecting differential interfaces like RS-485, CAN, or LVDS. Its symmetrical VBR and VC characteristics ensure identical clamping behavior for positive and negative transients, eliminating layout constraints associated with unidirectional TVS devices such as the SMCJ18A.
Does the 3.0C18CA-M3 meet lead-free reflow requirements?
Yes, the 3.0C18CA-M3 features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards, and passes JESD 201 Class 2 whisker testing. Its MSL Level 1 rating permits exposure to peak reflow temperatures up to 260 °C without preconditioning, supporting standard lead-free assembly processes.
How does the 3.0C18CA-M3 compare to the 3.0C18A-M3?
The 3.0C18CA-M3 is bidirectional, whereas the 3.0C18A-M3 is unidirectional. Both share identical VBR, VC, and PPPM ratings, but the "CA" suffix denotes symmetrical breakdown and clamping. For AC-coupled or floating signal lines, the 3.0C18CA-M3 avoids polarity errors and simplifies layout; the 3.0C18A-M3 requires strict orientation control and is limited to DC-biased applications.
What is the maximum junction temperature rating for the 3.0C18CA-M3?
The 3.0C18CA-M3 has a maximum junction temperature (TJ) of +175 °C and a storage temperature range of −55 °C to +175 °C. This wide thermal envelope supports operation in under-hood automotive, industrial motor drive, and outdoor telecom equipment where ambient temperatures exceed 100 °C, provided PCB thermal relief and mounting pad design follow JEDEC 51-2A guidelines.
3.0C18CA-M3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 103A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
3.0C18CA-M3/H FAQ
1.How can I place an order for 3.0C18CA-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for 3.0C18CA-M3/H 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 3.0C18CA-M3/H reliable?
The price and inventory of 3.0C18CA-M3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3.0C18CA-M3/H is usually 5 days.
3.What payment methods are accepted for 3.0C18CA-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3.0C18CA-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3.0C18CA-M3/H?
3.0C18CA-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3.0C18CA-M3/H 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 3.0C18CA-M3/H?
For technical support, including 3.0C18CA-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3.0C18CA-M3/H requirements.
6.How does Aetrix verify that 3.0C18CA-M3/H is sourced from the original manufacturer or authorized distributors?
All 3.0C18CA-M3/H 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 3.0C18CA-M3/H meets industry standards.
7.What is the process for return or replacement of 3.0C18CA-M3/H?
All 3.0C18CA-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with 3.0C18CA-M3/H, 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 3.0C18CA-M3/H part is unused and in its original packaging.
Return procedure for 3.0C18CA-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3.0C18CA-M3/H Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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