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Diodes Incorporated 3.0SMCJ8.5CA-13
- Part No.:
- 3.0SMCJ8.5CA-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3.0SMCJ8.5CA-13.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,018
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Product details
Overview
3.0SMCJ8.5CA-13 from Diodes Incorporated is a bi-directional 3000W surface-mount transient voltage suppressor (TVS) designed for overvoltage protection in DC power rails and signal lines. It features a 8.5V reverse standoff voltage (VRWM), 9.44–10.43V breakdown voltage (VBR) at 1.0mA test current, 14.4V max clamping voltage (VC) at 208.3A peak pulse current (IPP), and IEC-61000-4-2 ESD rating of 30kV (air/contact). It is used in industrial power supplies and automotive body control modules to absorb lightning-induced surges and ESD events.
For engineers reviewing the 3.0SMCJ8.5CA-13 datasheet, 3.0SMCJ8.5CA-13 pinout, 3.0SMCJ8.5CA-13 application, or 3.0SMCJ8.5CA-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, peak pulse current capability under 10/1000μs waveform, bi-directional symmetry for AC-coupled lines, and SMC package thermal performance on 8mm² copper land.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, with identical breakdown and clamping characteristics in forward and reverse directions. Its glass-passivated die ensures stable leakage (<25µA at VRWM) and repeatable avalanche response under repetitive transients.
The device complies with IEC-61000-4-2 Level 4 (30kV air/contact) and JEDEC high-reliability standards, and is rated for continuous operation from –55°C to +150°C junction temperature. It uses a single-junction avalanche structure optimized for low dynamic impedance during 10×1000μs surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 3000W - sustains 10×1000μs surges up to 208.3A without failure |
| Reverse Standoff Voltage | 8.5V - maximum continuous DC or RMS voltage before significant leakage |
| Breakdown Voltage | 9.44–10.43V @ 1.0mA - precise avalanche initiation threshold for predictable clamping onset |
| Max Clamping Voltage | 14.4V @ 208.3A - limits voltage seen by downstream ICs during worst-case surge |
| ESD Rating | 30kV air / 30kV contact per IEC-61000-4-2 - protects against human-handling ESD events |
| Operating Temperature | –55°C to +150°C - supports under-hood automotive and industrial ambient conditions |
Pinout & Package
Package: SMC (DO-214AB), molded plastic, UL 94V-0 rated, 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 surge conduction path | Both terminals function identically; no cathode band marking required |
| Case | Thermal and mechanical interface | Exposed copper pad on bottom aids heat dissipation into PCB copper pour |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Ensures long-term stability of breakdown voltage and leakage under thermal cycling and humidity |
| 3000W peak pulse power | Supports high-energy surge immunity in 24V/48V industrial bus systems without derating |
| Bi-directional symmetry | Enables single-device protection of AC-coupled interfaces (e.g., RS-485, CAN FD) without polarity concerns |
| RoHS-compliant & halogen-free | Fulfills EU environmental directives and automotive "Green" material requirements (Br+Cl <1500ppm, Sb <1000ppm) |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 24V digital input channels in programmable logic controllers from induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between field-side terminal and isolated digital input buffer IC. Use Value: Limits transient voltage to ≤14.4V, preventing latch-up or damage to 3.3V/5V input receivers while surviving repeated 1kV/500Ω ring-wave tests. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs in door module ECUs exposed to load dump and jump-start events. IC Role / Device Role / Timing Role: Secondary-level TVS placed directly at connector entry point, upstream of local LDO and signal conditioning. Use Value: Clamps 12V rail transients to <15V within 1ns, meeting ISO 7637-2 Pulse 1/2a/5a immunity requirements without adding series impedance. |
| RS-485 Communication Port | DC Power Input Stage |
Use Scenario: Protecting half-duplex RS-485 transceivers in building automation gateways connected to long outdoor runs. IC Role / Device Role / Timing Role: Bi-directional TVS across A/B differential pair and ground, referenced to common-mode voltage. Use Value: Maintains signal integrity by clamping common-mode surges to <15V while preserving >10kV ESD robustness on both data lines simultaneously. |
Use Scenario: Front-end surge suppression on 12V/24V DC input of medical power supply units subject to EN 61000-4-5 line-to-ground surges. IC Role / Device Role / Timing Role: First-line transient absorber placed after fuse and before bulk capacitor and primary controller. Use Value: Absorbs 3000W peak energy from 2Ω/12Ω combination wave surges, reducing stress on downstream MOVs and enabling smaller Y-capacitor sizing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5CA | Same VRWM and VBR, but 600W PPK rating and SMB package (lower thermal mass) | Limited to lower-energy surges; unsuitable for IEC 61000-4-5 Level 3/4 or automotive load dump | Select when space-constrained and surge threat level is limited to ESD-only or low-energy transients |
| SMCJ8.5CA | Identical electrical specs and SMC package, but non-RoHS / halogen-containing variant (legacy version) | Not compliant with EU RoHS 3 or automotive "Green" material mandates | Choose only for legacy rework or non-regulated markets where halogen-free compliance is not required |
Compared with SMBJ8.5CA, this part delivers 5× higher surge energy handling in the same footprint; versus legacy SMCJ8.5CA, it adds full RoHS 3 and halogen-free compliance without sacrificing clamping performance or thermal robustness.
Availability
3.0SMCJ8.5CA-13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, RS-485 communication ports, and DC power input stages requiring stable component supply across multi-year production cycles.
Supply support for 3.0SMCJ8.5CA-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.
This device belongs to the 3.0SMCJ series of high-power TVS diodes, engineered specifically for robust transient suppression in harsh industrial and automotive environments where reliability under repeated surge stress is critical.
FAQ
What is the difference between 3.0SMCJ8.5CA-13 and 3.0SMCJ8.5A-13?
The "C" in 3.0SMCJ8.5CA-13 denotes bi-directional configuration, meaning it clamps symmetrically for both positive and negative transients. In contrast, 3.0SMCJ8.5A-13 is uni-directional and features a cathode band; it only clamps in reverse bias and conducts forward current like a rectifier. The bi-directional version is required for AC-coupled or floating signal lines.
Can this TVS be used on a 5V logic rail?
No - its 8.5V reverse standoff voltage exceeds typical 5V rail operating margins. Using it on a 5V system risks premature conduction during normal operation due to tolerance stack-up and temperature drift. For 5V rails, 3.0SMCJ5.0CA-13 (5.0V VRWM) or SMBJ5.0CA are appropriate alternatives with verified 6.4–7.1V breakdown range.
Does this part meet AEC-Q200 qualification?
No - the 3.0SMCJ8.5CA-13 is an industrial-grade part qualified to JEDEC high-reliability standards but not AEC-Q200. For automotive applications, Diodes offers the Q-suffix variant (e.g., 3.0SMCJ8.5CAQ-13), which undergoes additional stress testing, PPAP documentation, and is manufactured in IATF 16949-certified facilities.
How does the SMC package affect thermal performance compared to SMA?
The SMC package provides ~2.5× greater thermal mass and larger copper pad area than SMA, enabling higher sustained power dissipation. With an 8mm² PCB copper land, it achieves lower junction-to-ambient thermal resistance (RθJA ≈ 45°C/W vs. ~75°C/W for SMA), allowing reliable operation at higher ambient temperatures and longer surge durations without thermal runaway.
3.0SMCJ8.5CA-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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 208.3A
- 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
3.0SMCJ8.5CA-13 FAQ
1.How can I place an order for 3.0SMCJ8.5CA-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 3.0SMCJ8.5CA-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 3.0SMCJ8.5CA-13 reliable?
The price and inventory of 3.0SMCJ8.5CA-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3.0SMCJ8.5CA-13 is usually 5 days.
3.What payment methods are accepted for 3.0SMCJ8.5CA-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3.0SMCJ8.5CA-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3.0SMCJ8.5CA-13?
3.0SMCJ8.5CA-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3.0SMCJ8.5CA-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 3.0SMCJ8.5CA-13?
For technical support, including 3.0SMCJ8.5CA-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3.0SMCJ8.5CA-13 requirements.
6.How does Aetrix verify that 3.0SMCJ8.5CA-13 is sourced from the original manufacturer or authorized distributors?
All 3.0SMCJ8.5CA-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 3.0SMCJ8.5CA-13 meets industry standards.
7.What is the process for return or replacement of 3.0SMCJ8.5CA-13?
All 3.0SMCJ8.5CA-13 units undergo pre-shipment inspection (PSI). If there is an issue with 3.0SMCJ8.5CA-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 3.0SMCJ8.5CA-13 part is unused and in its original packaging.
Return procedure for 3.0SMCJ8.5CA-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3.0SMCJ8.5CA-13 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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Diodes Incorporated
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