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Diodes Incorporated 3.0SMCJ120CA-13
- Part No.:
- 3.0SMCJ120CA-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3.0SMCJ120CA-13.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,954
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Product details
Overview
3.0SMCJ120CA-13 from Diodes Incorporated is a bi-directional 3000W surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in DC power rails and signal lines. It features a 120V reverse standoff voltage (VRWM), 193V maximum clamping voltage (VC) at 15.5A peak pulse current (IPP), and IEC-61000-4-2 ESD immunity of 30kV (air/contact). It is used in industrial power supplies to protect downstream DC-DC converters from lightning-induced surges.
For engineers reviewing the 3.0SMCJ120CA-13 datasheet, 3.0SMCJ120CA-13 pinout, 3.0SMCJ120CA-13 application, or 3.0SMCJ120CA-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VMAX, peak pulse power handling under 10/1000μs waveform, bi-directional symmetry for AC-coupled or floating bus protection, and SMC package thermal performance on 8mm² copper land.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: during transients exceeding VRWM = 120V, it avalanches to limit voltage across the protected line to ≤193V. Its glass-passivated junction ensures stable breakdown and low leakage (<5μA at VRWM).
It is rated for non-repetitive 10×1000μs surge waveforms per REA standard, with derating above +25°C ambient per Fig. 1. The bi-directional configuration eliminates polarity concerns in differential or AC-linked circuits such as PoE injectors or RS-485 transceivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 3000W - sustains single 10×1000μs surges up to 3kW without failure |
| Reverse Standoff Voltage | 120V - maximum continuous DC or RMS voltage before conduction begins |
| Clamping Voltage | 193V @ 15.5A - limits transient voltage seen by downstream circuitry |
| Breakdown Voltage | 133–147V @ 1mA - defines avalanche onset range with tight tolerance |
| ESD Rating | 30kV air / 30kV contact per IEC-61000-4-2 - protects against human-handling events |
| Operating Temp Range | −55°C to +150°C - supports under-hood automotive and industrial environments |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic body with matte tin-plated leads; moisture sensitivity level 1 per J-STD-020; weight ≈0.21g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during negative transients | One terminal of symmetrical bi-directional junction; no polarity marking required |
| Cathode | Current entry during positive transients | Second terminal of symmetrical bi-directional junction; functionally identical to Anode |
Key Features
| Feature | Design Value |
|---|---|
| 3000W peak pulse rating | Enables protection of 48V/60V industrial buses against IEC 61000-4-5 Level 4 surges (4kV/2Ω) |
| Bi-directional architecture | Supports AC-coupled interfaces (e.g., Ethernet PHY, CAN FD) without external polarity management |
| Glass-passivated die | Ensures long-term stability of VBR and low parametric drift over temperature and life |
| RoHS-compliant & halogen-free | Meets IPC-1752A material declaration requirements for green electronics manufacturing |
Applications
| Industrial Power Input Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24V/48V DC input stage of programmable logic controllers exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt clamping device that diverts surge energy away from upstream EMI filter and downstream DC-DC controller IC. Use Value: Clamps 120V-rated rail to ≤193V during 100A/50ms load dump, preserving input capacitor voltage rating and preventing controller latch-up. |
Use Scenario: LIN bus line protection in door module ECUs subjected to battery disconnect transients and ESD. IC Role / Device Role / Timing Role: Bi-directional transient clamp placed between LIN transceiver and connector, operating within ±40V common-mode window. Use Value: Maintains signal integrity below LIN physical layer threshold (±45V) while surviving 30kV contact ESD per ISO 10605. |
| Telecom PoE Injector Port | RS-485 Data Line Protection |
Use Scenario: Secondary-side 48V output of IEEE 802.3bt PoE++ injector, subject to cable discharge events and induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on PSE output, coordinated with upstream current limiting and fault detection. Use Value: Limits voltage excursion to <193V during 10/1000μs surges, ensuring compliance with PoE safety isolation barriers and maintaining PD compatibility. |
Use Scenario: Termination point of RS-485 trunk lines in factory automation networks, exposed to ground potential differences and lightning coupling. IC Role / Device Role / Timing Role: Differential-mode TVS pair (two devices) across A/B lines, referenced to local ground. Use Value: Symmetric clamping preserves differential signaling margin (≥200mV) while suppressing common-mode transients up to 3kW. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA-13 (Diodes Inc.) | Same VRWM and VC, but 600W rating (vs. 3000W); SMC → SMB package size reduction | Limited to lower-energy surges (e.g., HBM/CDM only); unsuitable for IEC 61000-4-5 Level 3+ | Select when board space is constrained and surge threat level is limited to ESD and low-energy switching noise. |
| 1.5SMC120CA (ON Semiconductor) | Identical 3000W rating and 120V VRWM, but higher VC = 197V and wider VBR tolerance (133–154V) | Marginally reduced clamping headroom; may require larger voltage derating for sensitive 120V-rail ICs | Acceptable where system-level clamping margin allows 4V higher VC and footprint compatibility exists. |
Compared with SMBJ120CA-13, the 3.0SMCJ120CA-13 delivers 5× higher surge energy handling in the same functional category; versus 1.5SMC120CA, it offers tighter VBR control and 4V lower clamping-critical for protecting 120V-rated GaN FET drivers.
Availability
3.0SMCJ120CA-13 is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, telecom PoE injector ports, and RS-485 data line protection requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 3.0SMCJ120CA-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design and manufacturing facilities certified to IATF 16949 and ISO 9001 standards.
This device belongs to Diodes' 3.0SMCJ series of high-power TVS diodes, engineered specifically for robust transient suppression in harsh industrial, automotive, and telecom infrastructure environments.
FAQ
What is the maximum clamping voltage of the 3.0SMCJ120CA-13 under standard test conditions?
The maximum clamping voltage (VC) is 193V at 15.5A peak pulse current (IPP), measured using the standardized 10×1000μs waveform per REA specifications. This value is guaranteed across the full operating temperature range of −55°C to +150°C and defines the upper voltage limit imposed on protected circuitry during surge events.
Is the 3.0SMCJ120CA-13 unidirectional or bidirectional, and how is polarity indicated?
The 3.0SMCJ120CA-13 is a bi-directional TVS diode with symmetrical avalanche characteristics in both polarities. It has no cathode band or polarity marking-its terminals are functionally interchangeable, making it ideal for AC-coupled or floating-bus applications like RS-485 or PoE data pairs where polarity cannot be assumed.
Can this TVS diode be used in automotive applications, and what qualifications does it meet?
While the standard 3.0SMCJ120CA-13 is not AEC-Q200 qualified, Diodes Incorporated offers automotive-grade variants (e.g., 3.0SMCJ120CAQ-13) with AEC-Q200 qualification, PPAP documentation, and manufacturing in IATF 16949-certified facilities. These Q-suffix parts are required for safety-critical vehicle subsystems.
How does the SMC package affect thermal performance in high-pulse-power operation?
The SMC package provides superior thermal dissipation versus smaller packages like SMB or SOD-123 due to its larger copper pad area (8.00 mm² recommended) and lower junction-to-ambient thermal resistance. This enables reliable 3000W pulse handling without thermal runaway, provided PCB layout follows Diodes' suggested pad dimensions and uses ≥2 oz copper on inner layers.
3.0SMCJ120CA-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):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 193V
- Current - Peak Pulse (10/1000µs):
- 15.5A
- 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
3.0SMCJ120CA-13 FAQ
1.How can I place an order for 3.0SMCJ120CA-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 3.0SMCJ120CA-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 3.0SMCJ120CA-13 reliable?
The price and inventory of 3.0SMCJ120CA-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3.0SMCJ120CA-13 is usually 5 days.
3.What payment methods are accepted for 3.0SMCJ120CA-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3.0SMCJ120CA-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3.0SMCJ120CA-13?
3.0SMCJ120CA-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3.0SMCJ120CA-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 3.0SMCJ120CA-13?
For technical support, including 3.0SMCJ120CA-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3.0SMCJ120CA-13 requirements.
6.How does Aetrix verify that 3.0SMCJ120CA-13 is sourced from the original manufacturer or authorized distributors?
All 3.0SMCJ120CA-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 3.0SMCJ120CA-13 meets industry standards.
7.What is the process for return or replacement of 3.0SMCJ120CA-13?
All 3.0SMCJ120CA-13 units undergo pre-shipment inspection (PSI). If there is an issue with 3.0SMCJ120CA-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 3.0SMCJ120CA-13 part is unused and in its original packaging.
Return procedure for 3.0SMCJ120CA-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3.0SMCJ120CA-13 Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
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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