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Diodes Incorporated SMCJ8.5AQ-13-F
- Part No.:
- SMCJ8.5AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.5AQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMC
- Quantity:
- Payment:
- Shipping:
Inventory:5,145
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Product details
Overview
SMCJ8.5AQ-13-F from Diodes Incorporated is a unidirectional 1,500W surface-mount automotive transient voltage suppressor (TVS) with 8.5V reverse standoff voltage, 9.44–10.4V breakdown voltage at 1mA, and 14.4V max clamping voltage at 104.2A peak pulse current. It protects CAN, LIN, and sensor interfaces in engine control units and body electronics against ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ESD surges.
For engineers reviewing the SMCJ8.5AQ-13-F datasheet, SMCJ8.5AQ-13-F pinout, SMCJ8.5AQ-13-F application, or SMCJ8.5AQ-13-F equivalent, this device is selected for AEC-Q101-compliant 12V automotive power rail protection where fast response (<1 ns), low clamping ratio (VC/VRWM ≈ 1.69), and IATF 16949-manufactured consistency are required.
Technical Context
This TVS diode operates as a unidirectional clamp on DC power lines, activating when reverse voltage exceeds 8.5V VRWM and fully clamping within nanoseconds to limit transients to ≤14.4V. Its glass-passivated junction ensures stable leakage (<20 µA at VRWM) and robust surge handling across -55°C to +150°C junction temperature.
The device conforms to ISO7637-2 Pulse 1 (-100V), Pulse 2a (+50V), Pulse 3a (-150V), and Pulse 3b (+100V), and meets ISO10605 ESD requirements (30kV air/contact discharge). Its SMC package supports 200A non-repetitive forward surge current under 8.3ms half-sine waveform conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W - sustains single high-energy transients without failure per 10×1000µs waveform |
| Reverse Standoff Voltage (VRWM) | 8.5V - maximum continuous DC voltage before significant leakage; sets minimum system operating margin |
| Breakdown Voltage (VBR) | 9.44–10.4V @ 1mA - precise activation threshold ensuring reliable turn-on before downstream IC damage |
| Max Clamping Voltage (VC) | 14.4V @ 104.2A - limits transient voltage seen by protected ICs to safe levels during worst-case surge |
| Leakage Current (IR) | 20 µA @ 8.5V - negligible standby power loss and minimal impact on low-current sensor bias networks |
| Operating Temperature | -55°C to +150°C - qualified for under-hood and transmission-control module environments |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including HTOL, TC, UHAST, and ESD testing per stress test plan |
Pinout & Package
Package: SMC (DO-214AB), molded plastic, UL 94V-0 rated, 0.21g weight, cathode band polarity indicator. Moisture sensitivity level 1 (J-STD-020).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; defines clamping reference for unidirectional operation |
| Cathode | Protected line input | Connected to 12V rail or signal line; conducts surge current to anode when reverse voltage exceeds VRWM |
Key Features
| Feature | Design Value |
|---|---|
| 1,500W peak pulse power | Handles ISO7637-2 Pulse 3a (-150V) without degradation, enabling single-device protection for 12V battery circuits |
| Glass passivated die | Ensures stable VBR tolerance and low IR drift over temperature and lifetime, critical for long-term automotive field reliability |
| AEC-Q101 qualification | Validated for automotive use with PPAP documentation support and IATF 16949 manufacturing traceability |
| Lead-free & halogen-free | RoHS 3 compliant (<900ppm Br, <900ppm Cl, <1000ppm Sb); compatible with lead-free reflow profiles and green manufacturing mandates |
Applications
| Engine Control Unit (ECU) Power Input | CAN FD Transceiver Protection |
|---|---|
|
Use Scenario: 12V battery feed to microcontroller power supply in gasoline/diesel ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy before it reaches LDOs and MCU VDD pins. Use Value: Limits voltage excursion to ≤14.4V during ISO7637-2 Pulse 1 (-100V), preventing brownout or latch-up in 3.3V/5V logic rails. |
Use Scenario: Protection of high-speed CAN FD physical layer transceivers (e.g., TJA1057) on vehicle chassis networks. IC Role / Device Role / Timing Role: Fast-response shunt clamp on CAN_H/CAN_L lines during ESD events per ISO10605. Use Value: Clamps 30kV contact discharge transients within <1 ns while maintaining <15 pF capacitance to avoid signal integrity degradation. |
| Body Control Module (BCM) Sensor Interface | ADAS Camera Power Rail |
|
Use Scenario: 5V/12V supply protection for ambient temperature, rain sensor, and door lock actuators in BCMs. IC Role / Device Role / Timing Role: Primary overvoltage suppression on sensor VCC lines subject to inductive switching noise from relays/motors. Use Value: Withstands repetitive 50V Pulse 2a surges without parameter shift, ensuring 15+ year field life in 125°C under-hood locations. |
Use Scenario: Front-facing camera module power input in lane-departure warning and automatic emergency braking systems. IC Role / Device Role / Timing Role: Secondary surge guard after primary DC-DC converter, protecting image sensor and ISP power domains. Use Value: Delivers 104.2A IPP capacity to absorb combined ISO7637-2 Pulse 3b (+100V) and ESD events without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC8.5-13-F | Same VRWM (8.5V) but lower PPK (600W); uses SMA package (smaller footprint, lower thermal mass) | Limited to lower-energy transients (e.g., ISO7637-2 Pulse 2a only); not rated for Pulse 1 or 3a | Select when board space is constrained and surge threat level is limited to infotainment or interior modules |
| SMCJ8.0AQ-13-F | Lower VRWM (8.0V); tighter VBR range (8.89–9.83V); identical PPK, VC, and package | Better suited for 8V nominal systems (e.g., certain ADAS radar supplies); may false-trigger on 12V rail ripple | Choose only if system nominal voltage is ≤8.3V and design tolerates reduced margin above VRWM |
Compared with SAC8.5-13-F and SMCJ8.0AQ-13-F, the SMCJ8.5AQ-13-F uniquely balances 8.5V standoff, full ISO7637-2 compliance, and SMC thermal robustness-making it the default choice for 12V power rail protection in powertrain and chassis ECUs.
Availability
SMCJ8.5AQ-13-F is available at Aetrix Electronics and suitable for engine control units, CAN FD network nodes, and ADAS camera power rails requiring stable component supply across automotive production lifecycles.
Supply support for SMCJ8.5AQ-13-F 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 components for automotive, industrial, and computing markets.
The SMCJ series belongs to Diodes' AEC-Q101-qualified automotive TVS portfolio, engineered specifically for ISO7637-2 and ISO10605 compliance in 12V/24V vehicle electrical systems.
FAQ
What is the clamping voltage of SMCJ8.5AQ-13-F at its rated peak pulse current?
The maximum clamping voltage (VC) is 14.4V at 104.2A peak pulse current, measured using the standardized 10×1000µs waveform. This value is guaranteed across -55°C to +150°C junction temperature and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMCJ8.5AQ-13-F bidirectional or unidirectional?
SMCJ8.5AQ-13-F is unidirectional, indicated by the absence of "C" in its part number. It conducts surge current only when reverse-biased beyond VRWM (8.5V), with a cathode band marking the protected line terminal. Bidirectional variants include "C" (e.g., SMCJ8.5CAQ-13-F) and lack polarity indicators.
Does this TVS diode require a heatsink in typical automotive applications?
No external heatsink is required. The SMC package provides sufficient thermal dissipation for single-pulse events, and its 5.0W steady-state power rating at TL = +75°C supports continuous operation in ambient temperatures up to +105°C when PCB copper area meets recommended pad layout (X1=9.40mm, Y=3.30mm per Diodes' outline).
How does SMCJ8.5AQ-13-F differ from industrial-grade SMCJ8.5A-13-F?
SMCJ8.5AQ-13-F adds AEC-Q101 qualification, PPAP capability, and IATF 16949 manufacturing controls-verified through extended reliability testing (HTOL, TC, UHAST). The industrial variant lacks automotive change control, traceability, and ESD robustness validation per ISO10605, making it unsuitable for vehicle production.
SMCJ8.5AQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 104.2A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
SMCJ8.5AQ-13-F FAQ
1.How can I place an order for SMCJ8.5AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.5AQ-13-F 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 SMCJ8.5AQ-13-F reliable?
The price and inventory of SMCJ8.5AQ-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ8.5AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMCJ8.5AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.5AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.5AQ-13-F?
SMCJ8.5AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.5AQ-13-F 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 SMCJ8.5AQ-13-F?
For technical support, including SMCJ8.5AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.5AQ-13-F requirements.
6.How does Aetrix verify that SMCJ8.5AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMCJ8.5AQ-13-F 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 SMCJ8.5AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMCJ8.5AQ-13-F?
All SMCJ8.5AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.5AQ-13-F, 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 SMCJ8.5AQ-13-F part is unused and in its original packaging.
Return procedure for SMCJ8.5AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ8.5AQ-13-F Tags
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