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Diodes Incorporated 3.0SMCJ85A-13
- Part No.:
- 3.0SMCJ85A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3.0SMCJ85A-13.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMC
- Quantity:
- Payment:
- Shipping:
Inventory:7,354
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Product details
Overview
3.0SMCJ85A-13 from Diodes Incorporated is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode with 85V reverse standoff voltage, 94.4V minimum breakdown voltage, and 137V maximum clamping voltage at 21.9A peak pulse current. It features glass-passivated die construction, IEC-61000-4-2 ESD protection (30kV air/30kV contact), and is RoHS-compliant and halogen-free. It protects DC power rails in industrial motor drives against lightning-induced surges and inductive switching transients.
For engineers reviewing the 3.0SMCJ85A-13 datasheet, 3.0SMCJ85A-13 pinout, 3.0SMCJ85A-13 application, or 3.0SMCJ85A-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current capability under 10/1000μs waveform, standoff voltage derating at elevated ambient temperature, and SMC package thermal performance on 8mm² copper land.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds 94.4V (min) and fully clamping within nanoseconds to limit downstream voltage to ≤137V at 21.9A. Its glass-passivated junction ensures stable leakage (<5μA at 85V) and repeatable breakdown across temperature (-55°C to +150°C).
The device complies with IEC-61000-4-2 Level 4 ESD immunity (30kV air/30kV contact) and supports high-reliability applications via JEDEC-qualified manufacturing. Its SMC package provides 3000W peak pulse power dissipation with thermal derating above +25°C per Fig. 1, requiring PCB layout with ≥8.00mm² copper pad area for rated surge handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 3000W - sustains single 10×1000μs surge without failure under specified mounting conditions |
| Reverse Standoff Voltage (VRWM) | 85V - maximum continuous DC or RMS voltage before significant leakage begins |
| Breakdown Voltage (VBR) | 94.4–104.3V @ 1mA - precise avalanche initiation range defining turn-on threshold |
| Clamping Voltage (VC) | 137V @ 21.9A - maximum voltage seen by protected circuit during worst-case 10×1000μs transient |
| Leakage Current (IR) | ≤5μA @ 85V - negligible standby power loss and minimal impact on high-impedance sensing nodes |
| ESD Rating | 30kV air / 30kV contact per IEC-61000-4-2 - withstands direct electrostatic discharge events without degradation |
| Operating Temperature | -55°C to +150°C - suitable for under-hood automotive, industrial control, and outdoor power electronics |
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 |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage event |
| Anode | Reference/ground return path | Must be tied to low-impedance system ground plane to ensure effective clamping and thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| 3000W peak pulse rating | Enables protection of 48V–110V DC systems against lightning surges (IEC 61000-4-5) and load dump transients |
| Glass-passivated die | Ensures long-term stability of breakdown voltage and leakage under thermal cycling and humidity stress |
| RoHS-compliant & halogen-free | Meets IPC-1752A material declaration requirements and EU Directive 2015/863/EU (RoHS 3) |
| 8.3ms surge current rating | Supports 300A non-repetitive forward surge (IFSM), critical for rectifier-stage protection in AC-DC front ends |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream MOSFETs, gate drivers, and MCU I/O pins |
Applications
| Industrial Motor Drive DC Bus Protection | Telecom Power Supply Input Stage |
|---|---|
Use Scenario: Protects 85V-rated DC bus capacitors and IGBT gate drivers in variable-frequency drives subjected to regenerative braking spikes and line transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between DC+ and chassis ground, clamping transients within 1ns to prevent gate oxide rupture and capacitor overvoltage. Use Value: 137V clamping voltage provides 15% margin below 150V-rated electrolytic capacitors and 30% margin below 200V IGBT gate-source breakdown. |
Use Scenario: Shields -48V telecom power distribution boards from induced surges on long cable runs and hot-swap connector arcing. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (cathode grounded) used across input terminals to absorb common-mode and differential surges per GR-1089-CORE. Use Value: 3000W rating handles 10/1000μs surges up to 21.9A while maintaining <5μA leakage at nominal -48V, avoiding false trips in monitoring circuits. |
| Automotive Body Control Module (BCM) Power Input | Renewable Energy Inverter DC Link |
Use Scenario: Secures 12V/24V BCM microcontroller power rails against load dump pulses (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS mounted directly at power entry point, with cathode to VIN and anode to ground, providing sub-10ns response to 100V+ transients. Use Value: 85V VRWM aligns with 24V system max operating voltage (28.5V) with 3× safety margin; 137V VC stays below 150V automotive-grade IC absolute maximum ratings. |
Use Scenario: Safeguards 800V DC link capacitors in solar inverters exposed to lightning-induced surges on PV string inputs and grid-side transients. IC Role / Device Role / Timing Role: Stacked TVS array (not single device) where 3.0SMCJ85A-13 serves as secondary clamp in multi-stage protection, limiting intermediate rail overshoot before primary MOV. Use Value: Tight 94.4–104.3V VBR tolerance enables predictable staging with upstream 120V TVS, reducing total clamping overshoot by 12% versus single-stage design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85A-13 (Diodes Inc.) | Same electrical specs but SMB package (lower 600W PPK, 12.5A IPP) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Class 3/4 | Select only if board space constraints prohibit SMC footprint and surge energy is ≤600W |
| 1.5SMC85A (ON Semiconductor) | Identical SMC package and 85V VRWM, but 1500W PPK (vs. 3000W) and 13.7A IPP | Insufficient for 3000W surge standards; requires parallel devices for equivalent energy handling | Choose only if cost sensitivity outweighs reliability margin and no 3000W compliance is required |
Compared with SMBJ85A-13 and 1.5SMC85A, the 3.0SMCJ85A-13 delivers double the peak pulse power and 70% higher peak current in the same SMC footprint-enabling single-device compliance with IEC 61000-4-5 Level 4 and eliminating parallel-layout complexity.
Availability
3.0SMCJ85A-13 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and renewable energy inverters requiring stable component supply and full IEC/ISO surge compliance.
Supply support for 3.0SMCJ85A-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 3.0SMCJ series belongs to Diodes' high-power TVS portfolio, engineered specifically for robust transient suppression in harsh industrial, automotive, and telecom environments where reliability under repeated surge stress is mandatory.
FAQ
What is the maximum clamping voltage of the 3.0SMCJ85A-13 under standard test conditions?
The maximum clamping voltage (VC) is 137V at 21.9A peak pulse current, measured 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 circuitry during surge events.
Is the 3.0SMCJ85A-13 suitable for bidirectional transient protection?
No - the "A" suffix denotes unidirectional configuration with a cathode band. It conducts only in reverse bias and must be oriented with cathode toward the protected line. For bidirectional protection, select the "CA" variant (e.g., 3.0SMCJ85CA-13), which has symmetrical breakdown in both polarities and no polarity marking.
How does the 3.0SMCJ85A-13 perform at elevated ambient temperatures?
Its peak pulse power derates linearly above +25°C: at +85°C, it retains ~70% of rated 3000W (≈2100W); at +125°C, ~45% (≈1350W). This derating follows Fig. 1 in DS30818 and assumes mounting on 8.00mm² copper land - reduced pad area accelerates thermal rolloff.
Does the 3.0SMCJ85A-13 meet automotive qualification standards?
As supplied, it is not AEC-Q200 qualified. Diodes offers automotive-grade equivalents with "Q" suffix (e.g., 3.0SMCJ85AQ-13), manufactured in IATF 16949-certified facilities and tested to AEC-Q200 stress requirements. Standard 3.0SMCJ85A-13 is intended for industrial and commercial applications.
3.0SMCJ85A-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 21.9A
- 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
3.0SMCJ85A-13 FAQ
1.How can I place an order for 3.0SMCJ85A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 3.0SMCJ85A-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 3.0SMCJ85A-13 reliable?
The price and inventory of 3.0SMCJ85A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3.0SMCJ85A-13 is usually 5 days.
3.What payment methods are accepted for 3.0SMCJ85A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3.0SMCJ85A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3.0SMCJ85A-13?
3.0SMCJ85A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3.0SMCJ85A-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 3.0SMCJ85A-13?
For technical support, including 3.0SMCJ85A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3.0SMCJ85A-13 requirements.
6.How does Aetrix verify that 3.0SMCJ85A-13 is sourced from the original manufacturer or authorized distributors?
All 3.0SMCJ85A-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 3.0SMCJ85A-13 meets industry standards.
7.What is the process for return or replacement of 3.0SMCJ85A-13?
All 3.0SMCJ85A-13 units undergo pre-shipment inspection (PSI). If there is an issue with 3.0SMCJ85A-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 3.0SMCJ85A-13 part is unused and in its original packaging.
Return procedure for 3.0SMCJ85A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3.0SMCJ85A-13 Tags
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