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Diodes Incorporated SMCJ33CAQ-13-F
- Part No.:
- SMCJ33CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ33CAQ-13-F.pdf
- Description:
- TVS DIODE 33VWM 53.3VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:30,778
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Product details
Overview
SMCJ33CAQ-13-F from Diodes Incorporated is a bidirectional 1,500W automotive transient voltage suppressor (TVS) diode in SMC package, with 33V reverse standoff voltage (VRWM), 53.3V max clamping voltage (VC) at 28.1A peak pulse current (IPP), and AEC-Q101 qualification for ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ESD protection in vehicle power line and signal interface circuits.
For engineers reviewing the SMCJ33CAQ-13-F datasheet, SMCJ33CAQ-13-F pinout, SMCJ33CAQ-13-F application, or SMCJ33CAQ-13-F equivalent, this part delivers verified clamping performance under automotive surge transients, supports lead-free reflow assembly, and meets IATF 16949 manufacturing traceability requirements for Tier 1 supply chain integration.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling robust protection of differential buses (e.g., CAN, LIN) and ungrounded signal lines without polarity dependency. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<5 µA at VRWM) over temperature.
The device responds within <1 ns to transient events and maintains clamping integrity under 10/1000 µs waveform stress up to 1,500W peak power. Derating follows a defined curve: 100% PPK at +25°C ambient, linearly decreasing to ~50% at +125°C ambient per Fig. 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 33.0 V - Maximum continuous reverse operating voltage before clamping begins; sets minimum system working voltage margin. |
| VBR (min/max) | 36.7 V / 40.6 V - Breakdown occurs within this range at 1.0 mA test current; defines clamping onset tolerance. |
| VC @ IPP | 53.3 V at 28.1 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum overvoltage exposure. |
| PPK | 1500 W - Peak non-repetitive surge power handling; validates compliance with ISO7637-2 Pulse 1 (-100 V) and Pulse 3a (-150 V). |
| IFSM | 200 A - 8.3 ms half-sine surge current rating; supports high-energy load dump immunity in 12 V automotive systems. |
| TJ Range | -55 °C to +150 °C - Full automotive temperature operation; enables placement near engine control units or power modules. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount molded plastic body with UL 94V-0 flammability rating, cathode band omitted due to bidirectional construction, 0.21 g typical weight, moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | No polarity marking; terminals interchangeable; conducts surge current equally in either direction when voltage exceeds ±VBR. |
| Case (exposed pad) | Thermal and mechanical anchor | Not electrically connected; provides thermal dissipation path to PCB copper and mechanical stability during thermal cycling. |
Key Features
| Feature | Design Value |
|---|---|
| 1,500W peak pulse power | Validated against ISO7637-2 Pulse 1 (-100 V), Pulse 3a (-150 V), and load dump surges in 12 V vehicle networks. |
| AEC-Q101 qualified | Qualified for automotive use with PPAP capability and manufactured in IATF 16949 certified facilities. |
| Glass passivated die | Ensures stable VBR tolerance, low leakage (<5 µA), and long-term reliability under thermal-humidity stress. |
| Lead-free & halogen-free | Meets RoHS 3 (2015/863/EU) and Diodes' "Green" definition: Br+Cl <1500 ppm, Sb <1000 ppm. |
Applications
| Automotive Power Line Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: 12 V battery feed line in engine control module exposed to ISO7637-2 Pulse 1 (inductive switch-off) and Pulse 3b (+100 V). IC Role / Device Role: Primary clamping element placed upstream of DC-DC converter input. Use Value: Limits transient voltage to ≤53.3 V, preventing damage to downstream 40 V-rated input stages. |
Use Scenario: Bidirectional protection on CAN_H/CAN_L differential pair in body control unit subjected to ISO10605 contact discharge (±30 kV). IC Role / Device Role: Symmetric TVS pair (one per line) referenced to chassis ground. Use Value: Maintains signal integrity by clamping common-mode surges without polarity biasing constraints. |
| Infotainment Display Interface | ADAS Camera Power Input |
Use Scenario: LVDS or FPD-Link III video interface between head unit and center display, vulnerable to ESD coupling via ribbon cable. IC Role / Device Role: Low-capacitance bidirectional TVS on each data line (CAN-style layout). Use Value: Adds <10 pF capacitance (per Fig. 2), preserving signal rise time while suppressing ±30 kV air/contact discharges. |
Use Scenario: 12 V power input to 77 GHz radar camera module mounted near front bumper. IC Role / Device Role: First-stage surge clamp before local LDO regulator. Use Value: Withstands repeated ISO7637-2 Pulse 2a (+50 V) events during alternator load switching without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC33-13-F | Same VRWM (33 V), lower PPK (600 W), smaller SMA package (lower thermal mass). | Limited to lower-energy transients (e.g., ISO10605 only); unsuitable for ISO7637-2 Pulse 1/3a. | Select only if space-constrained and surge energy is confirmed ≤600 W. |
| TPSMAJ33CA | Same VRWM (33 V), identical PPK (1500 W), but higher VC (54.0 V) and slightly slower response. | Valid for same ISO standards but may allow 0.7 V higher clamped voltage during worst-case surge. | Prefer when sourcing flexibility is needed and 0.7 V clamping margin is acceptable. |
Compared with SAC33-13-F and TPSMAJ33CA, SMCJ33CAQ-13-F offers optimal balance of high-energy surge handling, AEC-Q101 assurance, and industry-standard SMC footprint-making it the default choice for safety-critical 12 V power rail protection where derated thermal performance and full automotive qualification are mandatory.
Availability
SMCJ33CAQ-13-F is available at Aetrix Electronics and suitable for automotive power distribution, CAN/LIN bus interfaces, and ADAS sensor power inputs requiring stable component supply across multi-year vehicle production cycles.
Supply support for SMCJ33CAQ-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 with ISO/TS 16949 and IATF 16949 certifications.
The SMCJ series belongs to Diodes' automotive-grade TVS portfolio, engineered specifically to meet stringent ISO7637-2 and ISO10605 requirements for electronic control units in passenger vehicles and commercial fleets.
FAQ
Is SMCJ33CAQ-13-F unidirectional or bidirectional?
SMCJ33CAQ-13-F is bidirectional, indicated by the "C" suffix in the part number. It clamps symmetrically for both positive and negative transients, making it suitable for differential signal lines like CAN or ungrounded power rails where polarity reversal may occur during fault conditions.
What is the maximum clamping voltage under a 10/1000 µs surge?
The maximum clamping voltage (VC) is 53.3 V at 28.1 A peak pulse current (IPP), measured per the 10/1000 µs waveform defined in REA and Fig. 4 of DS40741 Rev. 8-2. This value is guaranteed across the full operating temperature range and forms the basis for protected circuit voltage margining.
Does this TVS require a heatsink for 1500W surge handling?
No external heatsink is required for single-event 1500W surges because energy is dissipated in <1 ms. However, PCB layout must include ≥100 mm² of 2 oz copper connected to both terminals to ensure adequate thermal mass and avoid localized overheating during repetitive surges or elevated ambient temperatures.
How does SMCJ33CAQ-13-F differ from industrial-grade SMCJ33CA?
SMCJ33CAQ-13-F includes AEC-Q101 qualification, PPAP documentation support, and manufacturing in IATF 16949-certified facilities-requirements absent in the standard SMCJ33CA. Electrically identical, the "Q" suffix denotes automotive-specific change control, traceability, and extended temperature validation (-55°C to +150°C TJ).
SMCJ33CAQ-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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 28.1A
- 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
SMCJ33CAQ-13-F FAQ
1.How can I place an order for SMCJ33CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ33CAQ-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 SMCJ33CAQ-13-F reliable?
The price and inventory of SMCJ33CAQ-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 SMCJ33CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMCJ33CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ33CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ33CAQ-13-F?
SMCJ33CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ33CAQ-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 SMCJ33CAQ-13-F?
For technical support, including SMCJ33CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ33CAQ-13-F requirements.
6.How does Aetrix verify that SMCJ33CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMCJ33CAQ-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 SMCJ33CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMCJ33CAQ-13-F?
All SMCJ33CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ33CAQ-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 SMCJ33CAQ-13-F part is unused and in its original packaging.
Return procedure for SMCJ33CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ33CAQ-13-F Tags
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