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Diodes Incorporated SMBJ70AQ-13-F
- Part No.:
- SMBJ70AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ70AQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMB
- Quantity:
- Payment:
- Shipping:
Inventory:9,348
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Product details
Overview
SMBJ70AQ-13-F from Diodes Incorporated is a unidirectional 600W surface-mount automotive transient voltage suppressor (TVS) diode with 70V reverse standoff voltage, 113V clamping voltage at 5.3A peak pulse current, and AEC-Q101 qualification for under-hood electronics protection against ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ESD events.
For engineers reviewing the SMBJ70AQ-13-F datasheet, SMBJ70AQ-13-F pinout, SMBJ70AQ-13-F application, or SMBJ70AQ-13-F equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, peak pulse power handling in 10/1000μs waveform, thermal derating above +25°C, and IATF 16949 manufacturing traceability for automotive BOMs.
Technical Context
This TVS operates as a unidirectional avalanche clamp in series with the power rail or signal line, triggered when transient voltage exceeds its 70V standoff rating. Its 113V clamping voltage limits downstream voltage stress during 10×1000μs surges up to 5.3A, while maintaining <0.5μA leakage at VRWM.
Designed for automotive environments, it sustains operation from −55°C to +175°C junction temperature and meets ISO7637-2 Pulse 1 (−150V), Pulse 2a (+112V), Pulse 3a (−220V), and Pulse 3b (+150V) test profiles without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - Sustains single 10×1000μs transients without failure |
| Reverse Standoff Voltage | 70V - Blocks normal 12V/24V automotive battery ripple and load dump overshoot |
| Clamping Voltage | 113V @ 5.3A - Limits voltage seen by protected MCU or sensor during ISO7637-2 Pulse 3a |
| Breakdown Voltage | 77.8–86.0V @ 1mA - Ensures reliable triggering before system overvoltage damage |
| Leakage Current | <0.5μA @ 70V - Prevents parasitic drain on always-on vehicle circuits |
| Operating Temperature | −55°C to +175°C - Supports placement near engines, ECUs, and powertrain modules |
| AEC-Q101 Qualified | Yes - Validated for automotive use with PPAP documentation and IATF 16949 production control |
Pinout & Package
Package: SMB (DO-214AA), surface-mount plastic case with matte tin-plated terminals, UL 94V-0 rated, moisture sensitivity level 1, weight ≈0.1g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Banded End) | Anode-to-cathode forward path | Connected to protected circuit ground; cathode tied to power rail for unidirectional clamping |
| Anode | Transient current sink node | Connected to supply line (e.g., battery feed); conducts surge current to ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-grade surge immunity | Validated per ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ±30kV ESD (air/contact) |
| High-temperature reliability | 175°C max junction temperature enables under-hood deployment without derating |
| Low-leakage clamping | <0.5μA IR at 70V VRWM preserves battery life in always-on vehicle subsystems |
| Green manufacturing compliance | Halogen- and antimony-free, RoHS 3 compliant (Br+Cl <1500ppm, Sb <1000ppm) |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) CAN Bus Lines |
|---|---|
Use Scenario: Protects 5V/3.3V microcontroller power rails from load dump transients during alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and LDO input to clamp voltage spikes before regulation. Use Value: Clamps 113V at 5.3A, ensuring downstream LDOs and MCUs remain within absolute maximum ratings during ISO7637-2 Pulse 3b (+150V). | Use Scenario: Shields high-speed CAN FD transceivers from coupled ESD and switching noise on vehicle wiring harnesses. IC Role / Device Role / Timing Role: Bidirectional-capable layout (though SMBJ70AQ is unidirectional; used on VCC side only) to suppress common-mode surges entering via connector pins. Use Value: 600W peak power rating absorbs multiple ISO10605 contact discharges without parametric shift or failure. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Electric Power Steering (EPS) Motor Driver Supply |
Use Scenario: Guards image sensor and serializer ICs from ignition-induced transients in front-end camera modules. IC Role / Device Role / Timing Role: Mounted at camera module PCB edge, clamping 12V supply rail before DC-DC converter input. Use Value: 70V VRWM aligns with 12V nominal system; 113V VC ensures sensor ICs (rated to 120V abs max) survive worst-case ISO7637-2 Pulse 1 (−150V). | Use Scenario: Safeguards gate drivers and current sense amplifiers in EPS H-bridge controllers exposed to motor back-EMF and battery reversal. IC Role / Device Role / Timing Role: Placed across motor driver VBAT and GND to absorb inductive kickback energy during PWM commutation. Use Value: 100A IFSM rating handles repetitive 8.3ms half-sine surges from motor switching without bond wire fusing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70A-Q | Same electrical specs; differs only in packaging marking (no "-13-F" tape/reel suffix) | No functional difference; identical AEC-Q101 qualification and thermal performance | Select when standard reel packaging suffices and no specific carrier requirement exists |
| SMCJ70A-Q | Higher 1500W PPK rating, larger SMC package (DO-214AB), 125A IFSM | Used where higher surge margin is required (e.g., alternator output lines), but requires more PCB area | Choose for primary battery feed protection where space permits and 1500W rating is mandated |
Compared with SMBJ70AQ-13-F, SMBJ70A-Q offers identical protection in alternate packaging, while SMCJ70A-Q trades compact SMB size for 2.5× higher surge capacity-critical for high-energy bus nodes but unsuitable for dense ADAS camera layouts.
Availability
SMBJ70AQ-13-F is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering designs requiring stable component supply with full automotive traceability.
Supply support for SMBJ70AQ-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 computing markets.
The SMBJ series is part of Diodes' AEC-Q101-qualified TVS portfolio designed specifically for robust transient suppression in harsh automotive environments including powertrain, chassis, and infotainment systems.
FAQ
What is the polarity configuration of SMBJ70AQ-13-F?
SMBJ70AQ-13-F is a unidirectional TVS diode with cathode indicated by a band on the SMB package. It conducts surge current only from anode to cathode during positive transients on the anode side, making it suitable for DC power rail protection where polarity is fixed.
Does SMBJ70AQ-13-F meet ISO7637-2 Pulse 3a requirements?
Yes. SMBJ70AQ-13-F is validated for ISO7637-2 Pulse 3a (−220V, 50Ω source impedance) with a clamping voltage of 113V at 5.3A, providing sufficient margin below typical 120V-abs-max ratings of protected automotive ICs when properly laid out with low-inductance grounding.
Can SMBJ70AQ-13-F be used on bidirectional signal lines like CAN?
No. As a unidirectional device, SMBJ70AQ-13-F is not suitable for bidirectional data lines such as CAN or LIN. For those applications, a bidirectional variant (e.g., SMBJ70CAQ-13-F) or dedicated bidirectional TVS must be selected to avoid forward conduction during normal signal swing.
What is the steady-state power dissipation limit at +75°C ambient?
At TL = +75°C, SMBJ70AQ-13-F has a steady-state power dissipation limit of 5.0W. This rating assumes lead temperature control per JEDEC standards and applies to continuous DC leakage or low-frequency surge repetition-not to transient events covered by the 600W peak rating.
SMBJ70AQ-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):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 5.3A
- 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
SMBJ70AQ-13-F FAQ
1.How can I place an order for SMBJ70AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ70AQ-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 SMBJ70AQ-13-F reliable?
The price and inventory of SMBJ70AQ-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 SMBJ70AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ70AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ70AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ70AQ-13-F?
SMBJ70AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ70AQ-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 SMBJ70AQ-13-F?
For technical support, including SMBJ70AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ70AQ-13-F requirements.
6.How does Aetrix verify that SMBJ70AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ70AQ-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 SMBJ70AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ70AQ-13-F?
All SMBJ70AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ70AQ-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 SMBJ70AQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ70AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ70AQ-13-F Tags
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ESD9B5.0ST5G
onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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