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Diodes Incorporated 3.0SMCJ12CA-13
- Part No.:
- 3.0SMCJ12CA-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3.0SMCJ12CA-13.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMC
- Quantity:
- Payment:
- Shipping:
Inventory:9,005
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Product details
Overview
3.0SMCJ12CA-13 from Diodes Incorporated is a bi-directional 12V transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It delivers 3000W peak pulse power dissipation, clamps transients to ≤19.9V at 150.8A peak pulse current, and meets IEC-61000-4-2 ESD immunity (30kV air/30kV contact). It is used in industrial power supplies and automotive body control modules to safeguard microcontrollers and interface ICs against lightning-induced surges and EFT events.
For engineers reviewing the 3.0SMCJ12CA-13 datasheet, 3.0SMCJ12CA-13 pinout, 3.0SMCJ12CA-13 application, or 3.0SMCJ12CA-13 equivalent, key selection criteria include standoff voltage (12V), clamping voltage (19.9V), peak pulse current (150.8A), package thermal performance (SMC), and bi-directional symmetry for AC-coupled or floating-line protection.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to fast-rising transients. Its glass-passivated junction ensures stable breakdown behavior across -55°C to +150°C operating temperature range and supports non-repetitive 8.3ms half-sine surge currents up to 300A under defined PCB land conditions.
The bi-directional configuration enables symmetrical clamping on both polarities without polarity marking, making it suitable for differential data lines (e.g., RS-485, CAN FD) and ungrounded AC inputs. Its 1.0mA test current and 5.0µA max reverse leakage at VRWM ensure minimal standby power impact in always-on systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 3000W - Sustains high-energy surges (e.g., ISO 7637-2 Pulse 5a) without failure when mounted per JEDEC-standard SMC land pattern. |
| Reverse Standoff Voltage | 12.0V - Maximum continuous DC or RMS voltage the device blocks before entering avalanche conduction; sets minimum system operating margin. |
| Breakdown Voltage | 13.3–14.7V @ 1.0mA - Confirmed avalanche initiation range; ensures reliable turn-on before downstream IC absolute maximum ratings are exceeded. |
| Clamping Voltage | 19.9V @ 150.8A - Measured under 10×1000µs waveform; defines maximum voltage seen by protected circuit during worst-case surge event. |
| Peak Pulse Current | 150.8A - Maximum transient current the device safely diverts while maintaining clamping voltage ≤19.9V; determines survivability under IEC 61000-4-5 Level 4 (4kV) |
| ESD Rating | 30kV air / 30kV contact per IEC-61000-4-2 - Validated immunity level for handling and system-level electrostatic discharge events. |
| Operating Temperature | -55°C to +150°C - Enables deployment in under-hood automotive, industrial motor drives, and outdoor power electronics without derating. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic with UL 94V-0 flammability rating; 0.21g mass; matte tin-plated leads solderable per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Current entry terminal during negative transient | One of two symmetrical terminals; no polarity marking required for bi-directional operation; connects to line under protection. |
| Cathode (K) | Current entry terminal during positive transient | Electrically identical to Anode in bi-directional configuration; forms low-impedance path to ground or return rail during either polarity surge. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of AC-coupled or floating interfaces (e.g., RS-485, CAN, Ethernet PHY bias networks) without polarity concerns. |
| Glass-passivated junction | Ensures stable, repeatable breakdown characteristics and long-term reliability under thermal cycling and humidity exposure. |
| JEDEC-qualified high-reliability construction | Validated per AEC-Q standards for automotive-grade applications; supports PPAP documentation and IATF 16949 manufacturing traceability. |
| RoHS 3 & "Green" compliant | Contains <900ppm Br, <900ppm Cl (<1500ppm total Br+Cl), and <1000ppm Sb - meets global environmental compliance requirements for export and OEM acceptance. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module |
|---|---|
|
Use Scenario: 24V DC input to PLC I/O module exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Shunt clamping device placed between VIN and chassis ground to limit voltage excursion below 20V during 12V/24V system surges. Use Value: Prevents damage to upstream DC-DC controllers and downstream logic ICs by clamping transients to ≤19.9V at 150.8A, meeting ISO 16750-2 Pulse 5a requirements. |
Use Scenario: LIN bus line in door module subjected to ESD and cable discharge events. IC Role / Device Role / Timing Role: Bi-directional TVS connected between LIN signal and ground to absorb ±30kV contact ESD pulses without latch-up or parametric shift. Use Value: Maintains LIN communication integrity by limiting transient voltage to ≤19.9V, preserving signal eye diagram and ensuring >100,000-cycle reliability per AEC-Q101. |
| RS-485 Data Line Protection | Smart Meter AC Mains Interface |
|
Use Scenario: Half-duplex RS-485 transceiver pair (A/B) in utility metering gateway exposed to induced surges on long field wiring. IC Role / Device Role / Timing Role: Two 3.0SMCJ12CA-13 devices placed differentially (A-to-GND and B-to-GND) to clamp common-mode transients while preserving differential signaling integrity. Use Value: Provides 3000W common-mode surge handling per line, enabling compliance with IEC 61000-4-5 Level 3 (2kV) without signal distortion or receiver saturation. |
Use Scenario: Isolated AC-DC auxiliary supply input in smart electricity meter, subject to lightning-induced surges on mains-connected PCB traces. IC Role / Device Role / Timing Role: Primary-stage TVS placed across bridge rectifier output to clamp surge energy before it reaches primary-side controller and optocoupler feedback path. Use Value: Limits peak voltage to ≤19.9V during 10×1000µs surges, preventing overvoltage stress on 25V-rated primary-side capacitors and ensuring >10-year field life under repeated surge exposure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA-13 (Diodes Inc.) | Lower peak pulse power (600W), same 12V standoff and bi-directional configuration; SMC → SMB package size reduction. | Not suitable for IEC 61000-4-5 Level 4 or ISO 7637-2 Pulse 5a; limited to lower-energy surges (e.g., board-level ESD only). | Select when space-constrained layouts require smaller footprint and surge threat level is ≤600W (e.g., consumer IoT sensor nodes). |
| 1.5SMC12CA (ON Semiconductor) | Same SMC package and 3000W rating, but specified with tighter clamping voltage tolerance (19.5V max vs. 19.9V) and higher IR limit (10µA vs. 5µA at VRWM). | Approved for automotive AEC-Q101 Grade 0 (-40°C to +150°C), whereas 3.0SMCJ12CA-13 requires Q-suffix variant for full AEC qualification. | Select when AEC-Q101 Grade 0 certification is mandatory without additional qualification effort, and sub-0.4V clamping improvement is critical. |
Compared with SMBJ12CA-13, 3.0SMCJ12CA-13 provides 5× higher surge energy handling for mission-critical industrial interfaces; versus 1.5SMC12CA, it offers identical surge capability but requires separate AEC-Q101 validation for automotive use-making it optimal for cost-sensitive industrial designs where full automotive qualification is not mandated.
Availability
3.0SMCJ12CA-13 is available at Aetrix Electronics and suitable for industrial power input protection, RS-485 data line hardening, and smart meter AC mains interface applications requiring stable component supply and long-term obsolescence management.
Supply support for 3.0SMCJ12CA-13 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability protection, power management, and signal integrity solutions for industrial, automotive, and computing markets.
The 3.0SMCJ series targets high-energy transient suppression in harsh environments, with design focus on automotive-grade surge resilience, extended temperature operation, and JEDEC-compliant manufacturability for automated SMT assembly.
FAQ
What is the maximum clamping voltage of 3.0SMCJ12CA-13 under standard test conditions?
The maximum clamping voltage is 19.9V, measured at 150.8A peak pulse current using the standardized 10×1000µs waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (-55°C to +150°C) and defines the upper voltage limit imposed on protected circuits during surge events.
Is 3.0SMCJ12CA-13 suitable for automotive applications without modification?
No-while the base 3.0SMCJ12CA-13 meets JEDEC reliability standards and operates across -55°C to +150°C, full automotive qualification (AEC-Q101) requires the Q-suffix variant (e.g., 3.0SMCJ12CAQ-13), which undergoes additional stress testing and is manufactured in IATF 16949-certified facilities with PPAP documentation support.
How does the bi-directional configuration affect PCB layout compared to uni-directional TVS diodes?
Bi-directional operation eliminates the need for cathode band orientation checks during placement; both terminals are functionally identical. Layout requires symmetric trace routing to ground for balanced impedance, and no polarity-aware silkscreen or assembly instructions are needed-reducing SMT line setup time and misorientation risk in high-volume production.
What is the thermal derating behavior above +25°C ambient temperature?
Peak pulse power and current ratings decrease linearly above +25°C, following the derating curve in Figure 1 of DS30818 Rev. 18-2: at +85°C ambient, rated peak pulse power drops to ~75% of 3000W (2250W), and at +125°C, it falls to ~50% (1500W), assuming proper PCB copper area (8.00mm² per pad) and still-air convection conditions.
3.0SMCJ12CA-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AB, SMC
- Series:
- 3.0SMCJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 150.8A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
3.0SMCJ12CA-13 FAQ
1.How can I place an order for 3.0SMCJ12CA-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 3.0SMCJ12CA-13 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 3.0SMCJ12CA-13 reliable?
The price and inventory of 3.0SMCJ12CA-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3.0SMCJ12CA-13 is usually 5 days.
3.What payment methods are accepted for 3.0SMCJ12CA-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3.0SMCJ12CA-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3.0SMCJ12CA-13?
3.0SMCJ12CA-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3.0SMCJ12CA-13 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 3.0SMCJ12CA-13?
For technical support, including 3.0SMCJ12CA-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3.0SMCJ12CA-13 requirements.
6.How does Aetrix verify that 3.0SMCJ12CA-13 is sourced from the original manufacturer or authorized distributors?
All 3.0SMCJ12CA-13 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 3.0SMCJ12CA-13 meets industry standards.
7.What is the process for return or replacement of 3.0SMCJ12CA-13?
All 3.0SMCJ12CA-13 units undergo pre-shipment inspection (PSI). If there is an issue with 3.0SMCJ12CA-13, 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 3.0SMCJ12CA-13 part is unused and in its original packaging.
Return procedure for 3.0SMCJ12CA-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3.0SMCJ12CA-13 Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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