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Diodes Incorporated SMCJ33AQ-13-F
- Part No.:
- SMCJ33AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ33AQ-13-F.pdf
- Description:
- TVS DIODE 33VWM 53.3VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,495
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Product details
Overview
SMCJ33AQ-13-F from Diodes Incorporated is a unidirectional 1,500W automotive transient voltage suppressor (TVS) diode in SMC package, with 33V reverse standoff voltage (VRWM), 53.3V max clamping voltage at 28.1A peak pulse current, and AEC-Q101 qualification for under-hood power line protection against ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ESD events.
For engineers reviewing the SMCJ33AQ-13-F datasheet, SMCJ33AQ-13-F pinout, SMCJ33AQ-13-F application, or SMCJ33AQ-13-F equivalent, this device is selected for robust overvoltage protection in 12V/24V automotive subsystems where fast response (<1 ns), low leakage (<5 µA), and high surge capability (200A IFSM) are critical to system reliability.
Technical Context
This TVS diode operates as a clamping-type surge protector in parallel with sensitive loads, triggering at breakdown voltage (VBR = 36.7–40.6V) to divert transients away from downstream circuitry. Its glass-passivated junction ensures stable performance across -55°C to +150°C operating range and supports IATF 16949-compliant manufacturing.
It responds to standardized automotive transients: clamps ISO7637-2 Pulse 1 (-100V), Pulse 2a (+50V), Pulse 3a (-150V), and Pulse 3b (+100V) while maintaining <5 µA reverse leakage at VRWM and delivering 1,500W peak pulse power per 10×1000µs waveform.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W - sustains single 10×1000µs surges without failure in automotive load-dump scenarios |
| Reverse Standoff Voltage (VRWM) | 33V - blocks normal 24V system operation while remaining inactive below clamp threshold |
| Max Clamping Voltage (VC) | 53.3V @ 28.1A - limits voltage seen by protected ICs during ISO7637-2 Pulse 1 (-100V) event |
| Breakdown Voltage (VBR) | 36.7–40.6V @ 1.0mA - defines precise conduction onset for predictable clamping behavior |
| Peak Forward Surge Current (IFSM) | 200A @ 8.3ms - handles repetitive load dump energy without bond wire fusing |
| Operating Temperature Range | -55°C to +150°C - qualified for engine bay placement per AEC-Q101 stress test requirements |
Pinout & Package
Package: SMC (DO-214AB), surface-mount molded plastic body with matte tin-plated terminals, cathode band polarity indicator, moisture sensitivity level 1, weight ≈ 0.21g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Banded End) | Anode Reference / Surge Return Path | Connected to ground or low-impedance return; defines unidirectional conduction direction |
| Anode (Non-Banded End) | Protected Line Input | Connected to 24V supply rail or signal line; receives transient energy prior to clamping |
Key Features
| Feature | Design Value |
|---|---|
| 1,500W Peak Pulse Power | Enables protection against severe ISO7637-2 Pulse 1 (-100V) and load dump events without thermal runaway |
| AEC-Q101 Qualified | Validated for automotive use with temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass Passivated Die | Ensures long-term stability of VBR and leakage under humidity and thermal aging conditions |
| Fast Response Time (<1 ns) | Clamps transients before they propagate into microcontrollers or CAN transceivers on adjacent nodes |
| RoHS 3 & Halogen-Free | Meets EU Directive 2015/863/EU with Br+Cl <1500ppm and Sb <1000ppm for green compliance |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) LIN Bus Line |
|---|---|
Use Scenario: Protects 24V supply input of diesel ECU against alternator load dump and battery reversal spikes. IC Role / Device Role: Primary clamping TVS placed directly at connector entry point before DC-DC converter input. Use Value: Limits voltage to ≤53.3V during 100V ISO7637-2 Pulse 1, preventing MOSFET gate oxide rupture and regulator latch-up. | Use Scenario: Shields LIN transceiver PHY from ESD events during service port connection/disconnection. IC Role / Device Role: Unidirectional TVS tied between LIN bus and chassis ground, referenced to local GND plane. Use Value: Withstands ±30kV contact discharge per ISO10605 while adding <10pF capacitance to preserve 19.2kbps signal integrity. |
| ADAS Camera Power Rail | Electric Power Steering (EPS) Motor Driver Stage |
Use Scenario: Guards 12V camera module input against ignition-induced transients in front-end ADAS domain controller. IC Role / Device Role: Secondary surge protection stage after primary fuse and upstream LC filter. Use Value: Delivers 28.1A IPP clamping capacity to absorb residual energy escaping upstream filtering, ensuring sensor uptime. | Use Scenario: Protects half-bridge gate drivers from inductive kickback during EPS motor commutation. IC Role / Device Role: Bidirectional-capable unidirectional TVS placed across motor phase outputs and ground. Use Value: Fast <1ns response prevents driver shoot-through caused by voltage overshoot exceeding absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC33-13-F | Same VRWM (33V), lower PPK (600W), smaller SMA package, non-AEC-Q101 | Limited to non-automotive industrial control; insufficient for ISO7637-2 Pulse 1 compliance | Select only for cost-sensitive non-automotive designs with lower surge exposure |
| SMCJ33A-Q | Identical electrical specs, same AEC-Q101 grade, but packaged in tape-and-reel with different carrier (non-13-F suffix) | No functional difference; differs only in packaging format and reel quantity (3,000 vs. custom) | Use when standard tape-and-reel logistics align with SMT line feed requirements |
Compared with SAC33-13-F and SMCJ33A-Q, SMCJ33AQ-13-F uniquely combines 1,500W surge rating, AEC-Q101 qualification, and SMC package thermal mass-making it the only choice for production automotive power rail protection requiring full ISO7637-2 compliance.
Availability
SMCJ33AQ-13-F is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering modules requiring stable component supply with full automotive traceability.
Supply support for SMCJ33AQ-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 IATF 16949-certified facilities.
The SMCJ series belongs to Diodes' AEC-Q101-qualified automotive TVS portfolio, designed specifically to meet stringent ISO7637-2 and ISO10605 immunity requirements in harsh vehicle environments.
FAQ
What is the clamping voltage of SMCJ33AQ-13-F at its rated peak pulse current?
The maximum clamping voltage (VC) is 53.3V at 28.1A peak pulse current (IPP), measured using the standardized 10×1000µs waveform per REA definition. This value ensures protected circuits remain within safe operating voltage limits during ISO7637-2 Pulse 1 and Pulse 3a events, and is verified across -55°C to +150°C operating range.
Is SMCJ33AQ-13-F suitable for bidirectional transient suppression?
No - SMCJ33AQ-13-F is unidirectional, indicated by the absence of "C" in its part number. Bidirectional versions (e.g., SMCJ33CAQ-13-F) exist but feature symmetric clamping and no cathode band. Using this part for AC or bipolar signal lines would result in forward conduction during negative transients, causing failure.
How does the SMC package contribute to thermal performance in automotive applications?
The SMC (DO-214AB) package provides 0.21g mass and copper lead frame construction, enabling effective heat dissipation during repetitive surge events. Its 5.59–6.22mm width and 6.60–7.11mm length allow ≥100°C/W PCB thermal resistance with 1-in² 2-oz copper pad, supporting sustained 5W steady-state power dissipation at TL = +75°C per Fig. 6 derating curve.
Does SMCJ33AQ-13-F require external current limiting for ISO10605 ESD protection?
No - the device is self-limiting due to its dynamic resistance (~1.8Ω calculated from ΔV/ΔI between VRWM and VC). At 30kV contact discharge, internal junction behavior clamps voltage without external series impedance, though layout best practices (short traces, direct ground via) remain essential to maintain sub-nanosecond response and avoid inductive overshoot.
SMCJ33AQ-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:
- 1
- Bidirectional Channels:
- -
- 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
SMCJ33AQ-13-F FAQ
1.How can I place an order for SMCJ33AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ33AQ-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 SMCJ33AQ-13-F reliable?
The price and inventory of SMCJ33AQ-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 SMCJ33AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMCJ33AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ33AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ33AQ-13-F?
SMCJ33AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ33AQ-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 SMCJ33AQ-13-F?
For technical support, including SMCJ33AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ33AQ-13-F requirements.
6.How does Aetrix verify that SMCJ33AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMCJ33AQ-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 SMCJ33AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMCJ33AQ-13-F?
All SMCJ33AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ33AQ-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 SMCJ33AQ-13-F part is unused and in its original packaging.
Return procedure for SMCJ33AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ33AQ-13-F Tags
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