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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Diodes Incorporated SMBJ6.5AQ-13-F

Name: SMBJ6.5AQ-13-F
Brand: Diodes Incorporated
SKU: SMBJ6.5AQ-13-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMBJ6.5AQ-13-F

Manufacturer:: Diodes Incorporated

Category:: TVS Diodes

Package:: DO-214AA, SMB

Datasheet:: SMBJ6.5AQ-13-F.pdf

Description:: TRANSIENT VOLTAGE SUPPRESSOR SMB

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Product details

Overview

SMBJ6.5AQ-13-F from Diodes Incorporated is a unidirectional 600W surface-mount automotive transient voltage suppressor (TVS) diode with 6.5V reverse standoff voltage, 7.22–7.98V breakdown voltage at 10mA, and 11.2V clamping voltage at 53.6A peak pulse current. It protects CAN, LIN, and sensor interfaces in 12V automotive power domains against ISO7637-2 Pulse 1 (−150V), Pulse 2a (+112V), and ISO10605 ESD (±30kV).

For engineers reviewing the SMBJ6.5AQ-13-F datasheet, SMBJ6.5AQ-13-F pinout, SMBJ6.5AQ-13-F application, or SMBJ6.5AQ-13-F equivalent, key selection criteria include clamping voltage margin relative to system rail, I_PP capability under ISO7637-2 Pulse 3b (+150V), AEC-Q101 qualification status, and SMB package thermal performance under sustained surge duty.

Technical Context

This TVS operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds V_RWM = 6.5V and fully clamping at V_C = 11.2V under 10×1000μs waveform. Its 600W peak pulse rating is derated linearly above +25°C ambient (4.8W/°C), supporting operation up to T_J = +175°C.

Designed for automotive subsystems with low-voltage rails (e.g., body control modules, ADAS camera power inputs), it meets ISO10605 (150pF/330Ω) and ISO7637-2 Pulse 1/2a/3a/3b requirements - excluding Pulse 1/2a/3a for devices with V_RWM < 13.5V per note 5, but valid for Pulse 3b (+150V) due to its 11.2V clamping headroom.

Key Specifications

Parameter	Value and Actual Design Meaning
Peak Pulse Power	600W - sustains single 10×1000μs transients without failure in automotive load-dump or ESD events
Reverse Standoff Voltage	6.5V - sets minimum operating margin above 5V logic or 6.0V sensor supply rails
Clamping Voltage @ I_PP	11.2V @ 53.6A - limits downstream IC stress during ISO7637-2 Pulse 3b (+150V)
Breakdown Voltage Range	7.22–7.98V @ 10mA - ensures reliable turn-on before rail overvoltage damages protected circuitry
Leakage Current @ V_RWM	<500µA @ 6.5V - negligible quiescent loading on low-power automotive sensors and microcontrollers
AEC-Q101 Qualified	Yes - validated for automotive use with PPAP capability and IATF 16949 manufacturing
Package	SMB - surface-mount footprint compatible with automated assembly; 0.1g mass supports thermal dissipation in constrained PCB areas

Pinout & Package

Package: SMB (Surface-Mount Small Outline), molded plastic UL 94V-0, moisture sensitivity level 1 per J-STD-020, matte tin-plated terminals solderable per MIL-STD-202 Method 208.

Pin/Terminal	Circuit Role	Design Meaning
Cathode Band (Marked End)	TVS Anode Connection	Connected to system ground; cathode terminal connects to protected line (e.g., CAN_H or LIN bus)
Anode (Unmarked End)	TVS Cathode Connection	Connected to protected signal/power line; polarity defines unidirectional clamping direction

Key Features

Feature	Design Value
600W Peak Pulse Power	Enables robust protection against severe ISO7637-2 load dump and coupled surges without thermal runaway
AEC-Q101 Qualification	Validates reliability for automotive under-hood and cabin applications with full PPAP documentation support
11.2V Clamping at 53.6A	Provides ≥1.8V margin below typical 13.5V battery nominal, preventing false triggering during cranking
RoHS & Halogen-Free	Complies with EU RoHS 3 (2015/863/EU) and Diodes' "Green" definition (<900ppm Br/Cl, <1000ppm Sb)
SMB Package Thermal Performance	5.0W steady-state dissipation at T_L = +75°C enables use in high-density automotive PCB layouts

Applications

Automotive Body Control Module (BCM)

ADAS Camera Power Input

Use Scenario: Protects 5V/6.5V power rails feeding door module microcontrollers and LIN transceivers from battery transients during jump-start or alternator load dump.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground, clamping negative-going pulses (ISO7637-2 Pulse 1) and positive surges (Pulse 3b).

Use Value: 11.2V clamping ensures downstream 6.0V-rated LDOs and MCU I/O remain within absolute maximum ratings during −150V/100ms Pulse 1 events.

Use Scenario: Shields 12V camera module power input from ISO7637-2 Pulse 2a (+112V) induced by relay switching in adjacent harnesses.

IC Role / Device Role / Timing Role: Primary surge clamp on main power feed, positioned upstream of DC-DC converter to prevent overvoltage propagation.

Use Value: 600W rating absorbs full Pulse 2a energy without degradation, maintaining >1000-cycle lifetime under repeated test conditions.

Infotainment System USB Port

Electric Power Steering (EPS) Sensor Interface

Use Scenario: Guards USB VBUS line (5V) against ESD events per ISO10605 (±30kV air/contact discharge) during cable hot-plug.

IC Role / Device Role / Timing Role: Fast-response unidirectional TVS tied between VBUS and ground, with <1ns response time to limit ESD-induced latch-up.

Use Value: 500µA max leakage at 6.5V avoids measurable droop on 5V rail, preserving USB enumeration timing margins.

Use Scenario: Protects analog output of steering angle sensor (0–5V ratiometric) from coupled noise during EPS motor commutation.

IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. 100pF) placed at sensor connector, clamping sub-100ns transients without distorting 10kHz signal bandwidth.

Use Value: 7.22–7.98V V_BR range ensures stable clamping onset across temperature, avoiding false triggers during −40°C to +125°C operation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar unidirectional automotive TVS applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ6.5A-13-F	No AEC-Q101 qualification; standard industrial grade only	Not approved for automotive production; limited to non-safety-critical prototyping	Select only if AEC-Q101 compliance is not required and cost is primary constraint
SMCJ6.5A-Q	Higher 1500W P_PK; larger SMC package (7.11 × 6.22 mm vs. SMB 3.94 × 5.59 mm)	Used where higher surge margin is needed (e.g., alternator output lines); requires more PCB area	Choose when system-level testing shows 600W insufficient for worst-case load dump scenarios

Compared with SMBJ6.5A-13-F, SMBJ6.5AQ-13-F adds AEC-Q101 validation and PPAP support for automotive BOMs; versus SMCJ6.5A-Q, it trades 2.5× lower surge capacity for 40% smaller footprint and better suitability for space-constrained sensor nodes.

Availability

SMBJ6.5AQ-13-F is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera systems, infotainment USB protection, and EPS sensor interfaces requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for SMBJ6.5AQ-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with design centers across Asia, Europe, and the US.

The SMBJ(AQ) series targets automotive-grade transient suppression, engineered specifically to meet ISO7637-2 and ISO10605 requirements while supporting IATF 16949-compliant manufacturing and PPAP documentation.

FAQ

What is the maximum clamping voltage of SMBJ6.5AQ-13-F under ISO7637-2 Pulse 3b conditions?

The SMBJ6.5AQ-13-F clamps to 11.2V at 53.6A under the standardized 10×1000μs waveform. While Pulse 3b specifies +150V amplitude, actual clamped voltage remains 11.2V due to the device's fixed V_C/I_PP characteristic - verified per Figure 4 and Table on page 3 of DS40740 Rev. 15-2.

Does SMBJ6.5AQ-13-F support bidirectional transient suppression?

No - SMBJ6.5AQ-13-F is unidirectional, indicated by the absence of "C" suffix (e.g., SMBJ6.5CAQ-13-F would be bidirectional). Its cathode band marks the anode connection point; it conducts only during reverse-biased overvoltage events, making it unsuitable for AC-coupled or symmetrical surge environments.

How does the 6.5V standoff voltage relate to 12V automotive battery systems?

The 6.5V V_RWM is selected for protection of sub-12V circuits - such as 5V logic rails, LIN transceivers, or sensor supplies - not the main battery rail. It provides ≥0.5V margin above typical 6.0V regulator outputs while ensuring fast turn-on before damage occurs, unlike higher-V_RWM parts that would allow excessive overvoltage on low-voltage nodes.

Is SMBJ6.5AQ-13-F compatible with lead-free reflow profiles?

Yes - it features matte tin plating compliant with JEDEC J-STD-020 moisture sensitivity level 1 and is rated for standard Pb-free reflow (peak 260°C, 30 sec max). The SMB package's thermal mass and UL 94V-0 molding compound ensure no delamination or voiding during IPC/JEDEC-compliant profiles.

SMBJ6.5AQ-13-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: DO-214AA, SMB

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 6.5V

Voltage - Breakdown (Min):: 7.22V

Voltage - Clamping (Max) @ Ipp:: 11.2V

Current - Peak Pulse (10/1000µs):: 53.6A

Power - Peak Pulse:: 600W

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:: SMB

SMBJ6.5AQ-13-F FAQ

1.How can I place an order for SMBJ6.5AQ-13-F through Aetrix?

Please submit a Request for Quotation (RFQ) for SMBJ6.5AQ-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 SMBJ6.5AQ-13-F reliable?

The price and inventory of SMBJ6.5AQ-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 SMBJ6.5AQ-13-F is usually 5 days.

3.What payment methods are accepted for SMBJ6.5AQ-13-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ6.5AQ-13-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMBJ6.5AQ-13-F?

SMBJ6.5AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMBJ6.5AQ-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 SMBJ6.5AQ-13-F?

For technical support, including SMBJ6.5AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ6.5AQ-13-F requirements.

6.How does Aetrix verify that SMBJ6.5AQ-13-F is sourced from the original manufacturer or authorized distributors?

All SMBJ6.5AQ-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 SMBJ6.5AQ-13-F meets industry standards.

7.What is the process for return or replacement of SMBJ6.5AQ-13-F?

All SMBJ6.5AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ6.5AQ-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 SMBJ6.5AQ-13-F part is unused and in its original packaging.

Return procedure for SMBJ6.5AQ-13-F:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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