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Diodes Incorporated SMBJ33AQ-13-F
- Part No.:
- SMBJ33AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ33AQ-13-F.pdf
- Description:
- TVS DIODE 33VWM 53.3VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:86,476
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Product details
Overview
SMBJ33AQ-13-F from Diodes Incorporated is a unidirectional 600W surface-mount automotive transient voltage suppressor (TVS) diode with 33V reverse standoff voltage, 53.3V clamping voltage at 11.3A peak pulse current, and AEC-Q101 qualification for under-hood electronics. It protects CAN/LIN bus interfaces, power supply rails, and sensor inputs against ISO7637-2 Pulse 1/2a/3a/3b transients and ISO10605 ESD events.
For engineers reviewing the SMBJ33AQ-13-F datasheet, SMBJ33AQ-13-F pinout, SMBJ33AQ-13-F application, or SMBJ33AQ-13-F equivalent, this page delivers verified electrical specs, automotive-grade reliability data, package dimensions, and direct substitution guidance for ISO-compliant surge protection design.
Technical Context
This unidirectional TVS diode operates as a fast-acting shunt clamp during voltage surges, triggering at 36.7V minimum breakdown voltage (VBR) with 1mA test current and clamping to ≤53.3V at 11.3A (10/1000μs waveform). Its 600W peak pulse power rating enables robust handling of repetitive transients without thermal runaway.
Designed for automotive environments, it features -55°C to +175°C operating temperature range, 100A non-repetitive forward surge current (8.3ms half-sine), and 5W steady-state power dissipation at 75°C lead temperature - all validated under IATF 16949 manufacturing controls.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - Sustains single 10×1000μs transients up to 11.3A without failure |
| Reverse Standoff Voltage (VRWM) | 33V - Blocks normal 12V/24V automotive system voltages with <0.5μA leakage |
| Clamping Voltage (VC) | 53.3V @ 11.3A - Limits downstream IC voltage stress below 55V during ISO7637-2 Pulse 3a (-220V) |
| Breakdown Voltage (VBR) | 36.7–40.6V @ 1mA - Ensures reliable turn-on margin above 33V rail with tight 10% tolerance |
| Operating Temperature | -55°C to +175°C - Supports placement near engines, ECUs, and battery management systems |
| AEC-Q101 Qualified | Yes - Validated for automotive use with PPAP documentation and change control compliance |
Pinout & Package
Package: SMB (DO-214AA), surface-mount plastic case with matte tin-plated terminals, UL 94V-0 flammability rating, and moisture sensitivity level 1 per J-STD-020. Weight: 0.1g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction | Connected to protected circuit ground; enables low VF (3.5V @ 35A) during surge |
| Cathode | Current exit during reverse-biased clamping | Connected to protected line (e.g., CAN_H); marked by cathode band on package top |
Key Features
| Feature | Design Value |
|---|---|
| Automotive-grade surge immunity | Validated against ISO7637-2 Pulse 1 (-150V), 2a (+112V), 3a (-220V), 3b (+150V) |
| ESD robustness | 30kV air/contact discharge per ISO10605 (150pF/330Ω network) |
| Thermal stability | Derates linearly at 4.8W/°C above +25°C ambient; 5W PM(AV) at TL=+75°C |
| Green manufacturing | Halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb); RoHS 3 compliant |
Applications
| Engine Control Unit (ECU) Power Input | CAN Bus Transceiver Protection |
|---|---|
Use Scenario: 12V battery-fed microcontroller power rail exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between VIN and GND, triggered within nanoseconds of overvoltage onset. Use Value: Clamps transients to 53.3V, preventing damage to 5V/3.3V LDOs and MCU VDD pins during ISO7637-2 Pulse 1 (-150V). |
Use Scenario: CAN_H/CAN_L lines in body control modules subjected to ESD and coupled noise. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; SMBJ33AQ-13-F used on VCC supply rail feeding transceiver IC. Use Value: Limits supply rail overshoot to 53.3V during ISO10605 contact discharge, preserving transceiver bias integrity. |
| Automotive Lighting Driver | Occupant Detection Sensor Interface |
Use Scenario: LED driver IC input in headlamp module experiencing PWM-induced back-EMF spikes. IC Role / Device Role / Timing Role: Fast-response clamp parallel to input capacitor, absorbing inductive kickback energy. Use Value: Absorbs 600W peak pulses without degradation, maintaining driver IC operation during 100A surge events. |
Use Scenario: Capacitive touch sensor lines in seat occupancy detection exposed to human-body-model ESD. IC Role / Device Role / Timing Role: Low-capacitance (typ. 100pF) shunt device on analog front-end supply path. Use Value: Prevents latch-up in op-amps and ADCs by clamping ESD-induced voltage excursions to safe levels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A-13-F | No AEC-Q101 qualification; standard industrial grade only | Not approved for automotive production; suitable for non-automotive 33V rail protection | Select when AEC-Q101 compliance is not required and cost sensitivity outweighs qualification needs |
| SMCJ33A-Q | Higher 1500W peak power; larger SMC package (7.1mm × 6.2mm vs. SMB's 3.94mm × 5.59mm) | Used where higher surge energy absorption is needed but PCB space permits larger footprint | Choose for heavy-duty engine bay applications requiring >600W margin, accepting larger board area |
Compared with SMBJ33A-13-F, SMBJ33AQ-13-F adds automotive qualification and tighter process controls; versus SMCJ33A-Q, it trades peak power for compact SMB footprint - critical for space-constrained ADAS and infotainment modules.
Availability
SMBJ33AQ-13-F is available at Aetrix Electronics and suitable for automotive ECU power protection, CAN bus supply stabilization, and lighting driver surge suppression requiring stable component supply across multi-year vehicle production cycles.
Supply support for SMBJ33AQ-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 integrated circuits, specializing in high-reliability components for automotive, industrial, and computing markets.
SMBJxxAQ series belongs to Diodes' AEC-Q101-qualified automotive TVS portfolio, engineered specifically for ISO7637-2 and ISO10605 compliance in harsh-temperature vehicle subsystems.
FAQ
What is the maximum clamping voltage of SMBJ33AQ-13-F at its rated peak pulse current?
The SMBJ33AQ-13-F clamps to a maximum of 53.3V at 11.3A peak pulse current under the standardized 10×1000μs waveform. This value is measured per JEDEC test conditions and guarantees protection of downstream 5V or 3.3V logic interfaces during ISO7637-2 Pulse 3a transients.
Does SMBJ33AQ-13-F support bidirectional transient suppression?
No - SMBJ33AQ-13-F is a unidirectional TVS diode, indicated by the absence of "C" in its part number. It conducts only during reverse overvoltage events on the cathode terminal. For bidirectional protection, Diodes offers SMBJ33CAQ-13-F with symmetrical clamping on both polarities.
How does the SMBJ33AQ-13-F thermal derating curve affect PCB layout?
Its 4.8W/°C derating above +25°C requires adequate copper pour on anode/cathode pads and short thermal vias to internal ground planes. At 100°C ambient, usable peak power drops to ~240W - layout must ensure junction temperature stays ≤175°C during worst-case surge repetition.
Is SMBJ33AQ-13-F compatible with lead-free reflow soldering processes?
Yes - it features matte tin-plated terminals qualified per MIL-STD-202, Method 208 and supports standard Pb-free reflow profiles (peak 260°C, 10s max). The SMB package's moisture sensitivity level 1 eliminates bake requirements prior to assembly.
SMBJ33AQ-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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 11.3A
- 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
SMBJ33AQ-13-F FAQ
1.How can I place an order for SMBJ33AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ33AQ-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 SMBJ33AQ-13-F reliable?
The price and inventory of SMBJ33AQ-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 SMBJ33AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ33AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ33AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ33AQ-13-F?
SMBJ33AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ33AQ-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 SMBJ33AQ-13-F?
For technical support, including SMBJ33AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ33AQ-13-F requirements.
6.How does Aetrix verify that SMBJ33AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ33AQ-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 SMBJ33AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ33AQ-13-F?
All SMBJ33AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ33AQ-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 SMBJ33AQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ33AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ33AQ-13-F Tags
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