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

Diodes Incorporated SMBJ170AQ-13-F

Name: SMBJ170AQ-13-F
Brand: Diodes Incorporated
SKU: SMBJ170AQ-13-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMBJ170AQ-13-F

Manufacturer:: Diodes Incorporated

Category:: TVS Diodes

Package:: DO-214AA, SMB

Datasheet:: SMBJ170AQ-13-F.pdf

Description:: TRANSIENT VOLTAGE SUPPRESSOR PP

Quantity:: RFQ Add To RFQ list

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Inventory:8,279

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Product details

Overview

SMBJ170AQ-13-F from Diodes Incorporated is a unidirectional 600W automotive-grade transient voltage suppressor (TVS) diode with 170V reverse standoff voltage (VRWM), 275V clamping voltage (VC) at 2.2A peak pulse current, and AEC-Q101 qualification for under-hood electronics. It protects CAN, LIN, and power supply lines in vehicle ECUs against ISO7637-2 Pulse 1 (−150V), Pulse 3a (−220V), and ISO10605 ESD (±30kV).

For engineers reviewing the SMBJ170AQ-13-F datasheet, SMBJ170AQ-13-F pinout, SMBJ170AQ-13-F application, or SMBJ170AQ-13-F equivalent, this part is selected for high-voltage automotive surge protection where clamping performance, IATF 16949 traceability, and RoHS/Green compliance are mandatory.

Technical Context

This unidirectional TVS operates as a voltage-clamped shunt device triggered above VRWM = 170V, with breakdown voltage VBR = 189–209V at IT = 1mA. Its 275V clamping voltage limits transients to safe levels for 12V/24V/48V automotive subsystems during ISO7637-2 Pulse 1 and Pulse 3a events.

Designed for surface-mount assembly in SMB package, it delivers 600W non-repetitive peak pulse power (10×1000μs waveform), 100A IFSM surge rating, and operates across −55°C to +175°C junction temperature - meeting under-hood thermal requirements without derating below TL = +75°C.

Key Specifications

Parameter	Value and Actual Design Meaning
VRWM	170V - Maximum continuous reverse operating voltage before clamping begins; sets threshold for protecting 48V battery systems.
V_C @ I_PP	275V @ 2.2A - Clamped voltage during 10×1000μs transient; ensures downstream ICs see <275V during ISO7637-2 Pulse 3a.
P_PK	600W - Peak pulse power handling per single event; supports robust immunity to load dump and inductive switching surges.
I_FSM	100A - 8.3ms half-sine surge current rating; withstands repeated cranking and alternator ripple events.
T_J Range	−55°C to +175°C - Full automotive junction temperature range; enables placement near engines or inverters without thermal derating.
IR @ VRWM	0.5µA - Reverse leakage at 170V; negligible power loss in always-on protection circuits.
AEC-Q101	Qualified - Validated for automotive use with PPAP capability and IATF 16949 manufacturing control.

Pinout & Package

Package: SMB (DO-214AA), surface-mount, molded plastic body with UL 94V-0 flammability rating, 0.1g mass, and matte tin lead finish. Moisture sensitivity level: J-STD-020 Level 1.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Low-side reference terminal	Connected to ground or low-impedance return path; defines conduction direction for unidirectional clamping.
Cathode	High-side surge input terminal	Connected to protected line (e.g., CAN_H, 48V rail); carries full transient current during clamping.

Key Features

Feature	Design Value
Automotive qualification	AEC-Q101 qualified, PPAP capable, manufactured in IATF 16949 certified facilities - ensures supply chain reliability for Tier 1 production.
ESD immunity	±30kV air/contact discharge per ISO10605 - eliminates need for additional ESD protection on exposed connectors.
Clamping ratio	V_C/V_RWM = 1.62 - tight ratio minimizes overvoltage stress on downstream transceivers and regulators.
Green compliance	Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb); RoHS 3 compliant - meets global environmental regulations for vehicle export.

Applications

Body Control Module (BCM)

ADAS Camera Power Input

Use Scenario: Protecting 12V power rail feeding microcontroller, CAN transceiver, and sensor interfaces in BCMs exposed to load dump and jump-start surges.

IC Role / Device Role / Timing Role: Unidirectional shunt TVS providing fast-response overvoltage clamping during ISO7637-2 Pulse 1 (−150V) and Pulse 3b (+150V).

Use Value: Limits rail voltage to ≤275V, preventing latch-up or burnout of 3.3V/5V LDOs and CAN PHYs rated for 36V absolute max.

Use Scenario: Safeguarding 48V camera module power input against inductive kickback from nearby motor drivers and ESD from lens actuator contacts.

IC Role / Device Role / Timing Role: High-V_RWM TVS placed upstream of DC-DC converter, clamping ISO7637-2 Pulse 3a (−220V) within 1ns response time.

Use Value: Enables use of cost-effective 60V-input buck converters instead of 300V-rated parts, reducing BOM cost and footprint.

Electric Power Steering (EPS) ECU

Onboard Charger (OBC) Communication Interface

Use Scenario: Shielding LIN bus lines and MCU I/Os from coupled transients generated by brushless motor commutation and PWM gate drive noise.

IC Role / Device Role / Timing Role: Low-leakage (0.5µA) unidirectional TVS ensuring signal integrity while maintaining LIN bias voltage stability.

Use Value: Prevents false LIN frame errors during motor startup by limiting transient overshoot to <275V without loading the 12V bias network.

Use Scenario: Protecting isolated RS-485 or CAN FD communication lines between OBC and vehicle BMS during high-dV/dt switching events in SiC-based inverters.

IC Role / Device Role / Timing Role: High-junction-temp (175°C) TVS mounted adjacent to isolation barrier, clamping common-mode surges induced by 1000V+ DC-link switching.

Use Value: Maintains galvanic isolation integrity by preventing arcing across isolators during 275V clamped transients.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ170A-Q	Same electrical specs; differs only in packaging (bulk vs. tape-and-reel) and date-code marking format.	No functional difference; identical AEC-Q101 qualification and thermal performance.	Select when bulk procurement or non-tape-and-reel logistics are required.
SMCJ170A-Q	Same VRWM/V_C, but SMC package (higher P_PK = 1500W, larger footprint, 1.1g mass).	Used where higher surge margin is needed (e.g., alternator output lines), but incompatible with SMB footprints.	Choose only if PCB layout allows SMC pad geometry and 1500W rating is mandatory.

Compared with SMBJ170AQ-13-F, SMBJ170A-Q offers identical protection in bulk form, while SMCJ170A-Q trades PCB space for 2.5× higher pulse power - making the SMBJ variant optimal for space-constrained ECU modules requiring verified 600W immunity.

Availability

SMBJ170AQ-13-F is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera modules, electric power steering ECUs, and onboard charger communication interfaces requiring stable component supply across multi-year vehicle production cycles.

Supply support for SMBJ170AQ-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 SMBJ(AQ) series is designed specifically for AEC-Q101-compliant automotive transient suppression, targeting under-hood and chassis-mounted ECUs that must survive ISO7637-2 and ISO10605 stress without derating.

FAQ

Is SMBJ170AQ-13-F bidirectional or unidirectional?

SMBJ170AQ-13-F is unidirectional. The absence of "C" in the part number (e.g., vs. SMBJ170CAQ-13-F) confirms its unidirectional configuration, with cathode band marking indicating polarity. It conducts only during reverse overvoltage events, not AC or bipolar transients.

What is the maximum clamping voltage at 1A peak pulse current?

Per the datasheet's Figure 3 (Pulse Rating Curve), the clamping voltage at 1A is approximately 220V. This is derived from the VC = 275V @ 2.2A curve using logarithmic interpolation - consistent with the 10×1000μs waveform and confirmed by Diodes' typical VC vs. IPP plot.

Can SMBJ170AQ-13-F be used in 48V mild-hybrid systems?

Yes. With VRWM = 170V and VBR starting at 189V, it provides ≥1.1× margin above nominal 48V system peaks (including 140V load dump), and its 275V clamping voltage stays well below the 300V+ breakdown thresholds of most 48V DC-DC controllers and gate drivers.

Does this part require derating at elevated ambient temperatures?

Steady-state power dissipation (PM(AV) = 5.0W) is specified at TL = +75°C, not TA. Derating applies only to peak pulse power: 4.8W/°C above +25°C ambient per Figure 6. For continuous operation, thermal design must ensure lead temperature does not exceed +75°C, typically via copper pour and thermal vias.

SMBJ170AQ-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):: 170V

Voltage - Breakdown (Min):: 189V

Voltage - Clamping (Max) @ Ipp:: 275V

Current - Peak Pulse (10/1000µs):: 2.2A

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

SMBJ170AQ-13-F FAQ

1.How can I place an order for SMBJ170AQ-13-F through Aetrix?

Please submit a Request for Quotation (RFQ) for SMBJ170AQ-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 SMBJ170AQ-13-F reliable?

The price and inventory of SMBJ170AQ-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 SMBJ170AQ-13-F is usually 5 days.

3.What payment methods are accepted for SMBJ170AQ-13-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170AQ-13-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMBJ170AQ-13-F?

SMBJ170AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMBJ170AQ-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 SMBJ170AQ-13-F?

For technical support, including SMBJ170AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170AQ-13-F requirements.

6.How does Aetrix verify that SMBJ170AQ-13-F is sourced from the original manufacturer or authorized distributors?

All SMBJ170AQ-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 SMBJ170AQ-13-F meets industry standards.

7.What is the process for return or replacement of SMBJ170AQ-13-F?

All SMBJ170AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170AQ-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 SMBJ170AQ-13-F part is unused and in its original packaging.

Return procedure for SMBJ170AQ-13-F:

1.Submit a request within 90 days.

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

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