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Diodes Incorporated 3.0SMCJ70CA-13
- Part No.:
- 3.0SMCJ70CA-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3.0SMCJ70CA-13.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,393
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Product details
Overview
3.0SMCJ70CA-13 from Diodes Incorporated is a bi-directional 3000W transient voltage suppressor (TVS) diode designed for high-energy surge protection on DC power rails and signal lines. It features a 70V reverse standoff voltage (VRWM), 113V maximum clamping voltage (VC) at 26.5A peak pulse current (IPP), and IEC-61000-4-2 ESD rating of 30kV (air/contact). It is used in industrial power supplies, automotive body electronics, and telecom interface protection.
For engineers reviewing the 3.0SMCJ70CA-13 datasheet, 3.0SMCJ70CA-13 pinout, 3.0SMCJ70CA-13 application, or 3.0SMCJ70CA-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, peak pulse current handling under 10/1000μs waveform, bi-directional symmetry for AC-coupled lines, and SMC package thermal performance under repeated surge stress.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with identical breakdown (77.8–86.0V) and clamping characteristics in either direction. Its glass-passivated junction ensures stable leakage (<5μA @ VRWM) and repeatable avalanche response over temperature (-55°C to +150°C).
The device meets JEDEC high-reliability standards and is rated for 3000W non-repetitive peak pulse power per 10×1000μs waveform. It delivers 26.5A IPP while limiting voltage to ≤113V - critical for protecting 75V-rated MOSFETs or 100V-input DC-DC controllers against lightning-induced surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 3000W - sustains single 10×1000μs transients without failure, enabling robust front-end protection in harsh environments. |
| Reverse Standoff Voltage (VRWM) | 70V - maximum continuous DC or RMS voltage before significant leakage; sets operating margin below protected circuit's max rating. |
| Clamping Voltage (VC) | 113V @ 26.5A - limits transient voltage seen by downstream components; 61% above VRWM ensures safe margin for 100V-rated devices. |
| Breakdown Voltage (VBR) | 77.8–86.0V @ 1mA - defines precise avalanche onset; tight 10.5% tolerance enables predictable protection threshold alignment. |
| ESD Rating | 30kV air / 30kV contact per IEC-61000-4-2 - qualifies for direct user-interface port protection without additional ESD stages. |
| Operating Temperature | -55°C to +150°C - supports under-hood automotive, industrial motor drives, and outdoor telecom equipment deployment. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic (UL 94V-0), 0.21g weight. Terminals are matte tin-plated for solderability per MIL-STD-202, Method 208. Bi-directional configuration has no polarity indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional avalanche junction | No cathode band; terminals interchangeable - enables placement on AC-coupled lines or bidirectional data buses without orientation check. |
| Case (exposed pad) | Thermal path / mechanical anchor | Not electrically connected; requires thermal pad design per Diodes' recommended 6.90×4.40mm footprint for optimal heat dissipation during surge events. |
Key Features
| Feature | Design Value |
|---|---|
| 3000W peak pulse power | Enables single-device protection against IEC-61000-4-5 Level 4 (4kV/2Ω) surges on 48V industrial buses without series impedance. |
| Glass-passivated die | Ensures long-term parameter stability and low parametric drift after >1000 surge events - critical for field-deployed infrastructure. |
| Bi-directional symmetry | Equal clamping in both directions (±113V) eliminates need for dual unidirectional devices on differential pairs like RS-485 or CAN bus. |
| RoHS 3 & "Green" compliant | Contains <900ppm Br, <900ppm Cl, <1000ppm Sb - meets automotive OEM chemical content requirements for PCB assembly and end-of-life recycling. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: 24–48V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Primary surge clamp placed upstream of DC-DC converter input, absorbing energy before it reaches primary-side FETs and controller IC. Use Value: Limits transient voltage to ≤113V, protecting 100V-rated input MOSFETs and ensuring uninterrupted operation during ISO 16750-2 pulse 5a (12V systems) and pulse 5b (24V systems). |
Use Scenario: LIN bus line protection in door module, subject to ESD events from user touch and battery transients during jump-start. IC Role / Device Role / Timing Role: Bi-directional TVS placed directly at connector, shunting fast ESD pulses before they reach LIN transceiver's I/O pins. Use Value: Withstands 30kV contact ESD per IEC-61000-4-2 and clamps sub-100ns events to <113V, preventing latch-up or damage to TJA1020-level transceivers. |
| Telecom Ethernet Surge Protection | Renewable Energy Inverter DC Link |
|
Use Scenario: Secondary-side 48V PoE (Power over Ethernet) interface where DC bias and data signals share conductors. IC Role / Device Role / Timing Role: Bi-directional clamp on each PoE pair, suppressing common-mode surges induced by nearby lightning strikes or AC mains coupling. Use Value: Symmetric clamping ensures no DC offset introduced; 26.5A IPP handles IEEE 802.3bt Type 4 surge tests without degradation across 1000+ cycles. |
Use Scenario: DC link between PV array and MPPT controller in solar microinverter, subjected to rapid voltage reversals and grid fault transients. IC Role / Device Role / Timing Role: Bidirectional TVS across DC+ and DC−, clamping reverse-polarity surges during islanding detection or anti-islanding relay switching. Use Value: 150°C max junction temperature rating allows operation in sealed enclosures; 113V clamping protects 120V-rated IGBT gate drivers during 600V system faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70CA-13 (Diodes Inc.) | Same VRWM (70V) and VC (113V), but lower PPK = 600W and IPP = 5.3A; SMB package (smaller thermal mass). | Suitable only for low-energy ESD-only protection; insufficient for IEC-61000-4-5 surges. | Select when board space is constrained and surge threat level is limited to IEC-61000-4-2 only. |
| SMCJ70CA-E3/57T (Vishay) | Identical PPK (3000W), VRWM (70V), VC (113V), and SMC package; minor differences in leakage (<1μA vs 5μA) and marking code. | Drop-in compatible in layout and electrical behavior; qualified to AEC-Q101 Grade 0 (−40°C to +150°C). | Choose for automotive programs requiring AEC-Q101 qualification and traceable lot history. |
Compared with SMBJ70CA-13, 3.0SMCJ70CA-13 delivers 5× higher surge energy handling for system-level immunity; versus SMCJ70CA-E3/57T, it offers identical protection performance but with Diodes' JEDEC-high-reliability process and RoHS 3 compliance documentation.
Availability
3.0SMCJ70CA-13 is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, telecom Ethernet surge protection, and renewable energy inverter DC link applications requiring stable component supply across multi-year production cycles.
Supply support for 3.0SMCJ70CA-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The 3.0SMCJxxCA series belongs to Diodes' high-power TVS portfolio, engineered specifically for industrial-grade surge immunity and automotive-compliant transient suppression in harsh electromagnetic environments.
FAQ
What is the maximum clamping voltage of 3.0SMCJ70CA-13 at its rated peak pulse current?
The maximum clamping voltage (VC) is 113V at 26.5A peak pulse current (IPP), measured under the standard 10×1000μs waveform per IEC-61000-4-5. This value is guaranteed across the full operating temperature range (−55°C to +150°C) and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events.
Is 3.0SMCJ70CA-13 suitable for protecting RS-485 communication lines?
Yes - its bi-directional architecture, 113V clamping, and 30kV IEC-61000-4-2 ESD rating make it appropriate for RS-485 bus protection. It should be placed at the connector with proper PCB layout (short traces, ground plane, and decoupling), and is commonly used alongside 120Ω termination and isolated signal conditioning to handle both ESD and fast transients on differential pairs.
How does the SMC package of 3.0SMCJ70CA-13 compare thermally to SMA or SMB packages?
The SMC package (DO-214AB) provides significantly higher thermal mass and lower junction-to-ambient resistance than SMA (DO-214AC) or SMB (DO-214AA). Its larger copper leadframe and 6.90×4.40mm recommended pad area enable sustained power dissipation during repetitive surges - critical for 3000W rating, whereas SMA/SMB variants are typically limited to ≤1500W.
Does 3.0SMCJ70CA-13 require derating at elevated ambient temperatures?
Yes - per Figure 1 in DS30818, peak pulse power must be linearly derated above +25°C: at +85°C, maximum PPK drops to ~75% (2250W); at +125°C, it falls to ~45% (1350W). Designers must verify clamping voltage and IPP remain within safe margins for the expected ambient and surge repetition rate in the target application.
3.0SMCJ70CA-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):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 26.5A
- 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
3.0SMCJ70CA-13 FAQ
1.How can I place an order for 3.0SMCJ70CA-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 3.0SMCJ70CA-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 3.0SMCJ70CA-13 reliable?
The price and inventory of 3.0SMCJ70CA-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3.0SMCJ70CA-13 is usually 5 days.
3.What payment methods are accepted for 3.0SMCJ70CA-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3.0SMCJ70CA-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3.0SMCJ70CA-13?
3.0SMCJ70CA-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3.0SMCJ70CA-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 3.0SMCJ70CA-13?
For technical support, including 3.0SMCJ70CA-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3.0SMCJ70CA-13 requirements.
6.How does Aetrix verify that 3.0SMCJ70CA-13 is sourced from the original manufacturer or authorized distributors?
All 3.0SMCJ70CA-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 3.0SMCJ70CA-13 meets industry standards.
7.What is the process for return or replacement of 3.0SMCJ70CA-13?
All 3.0SMCJ70CA-13 units undergo pre-shipment inspection (PSI). If there is an issue with 3.0SMCJ70CA-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 3.0SMCJ70CA-13 part is unused and in its original packaging.
Return procedure for 3.0SMCJ70CA-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3.0SMCJ70CA-13 Tags
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