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Diodes Incorporated SMCJ28AQ-13-F
- Part No.:
- SMCJ28AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ28AQ-13-F.pdf
- Description:
- TVS DIODE 28VWM 45.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,315
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Product details
Overview
SMCJ28AQ-13-F from Diodes Incorporated is an AEC-Q101-qualified unidirectional transient voltage suppressor (TVS) diode in SMC package, designed for automotive powerline protection. It features 28 V reverse standoff voltage (VRWM), 31.1–34.4 V breakdown voltage (VBR), 45.4 V clamping voltage (VC) at 33.0 A peak pulse current (Ipp), and 3000 W peak pulse power (10/1000 µs). It protects ECUs in HVAC, ADAS, and infotainment systems against ISO 7637-2 pulses and ISO 10605 ESD events.
For engineers reviewing the SMCJ28AQ-13-F datasheet, SMCJ28AQ-13-F pinout, SMCJ28AQ-13-F application, or SMCJ28AQ-13-F equivalent, key selection criteria include clamping performance under load dump transients, AEC-Q101 qualification status, SMC package thermal robustness, and compatibility with 12 V/24 V automotive supply rails.
Technical Context
This TVS operates as a unidirectional clamp on the positive rail, activating when transient voltage exceeds its 31.1 V minimum breakdown threshold. Its low 5 µA reverse leakage at VRWM ensures minimal standby power loss in always-on automotive modules.
The device meets ISO 7637-2 Pulse 1 (inductive switch-off), Pulse 2a/2b (load dump suppression), and Pulse 3 (capacitive coupling) requirements, with verified clamping at 45.4 V under 33.0 A 10/1000 µs surge - critical for safeguarding CAN transceivers and microcontroller I/O rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage (VRWM) | 28 V - maximum continuous DC operating voltage before significant leakage; matches nominal 24 V automotive system rails with margin. |
| Breakdown Voltage (VBR) @ IT=1 mA | 31.1–34.4 V - guaranteed activation range for transient suppression; ensures reliable turn-on before downstream IC damage thresholds. |
| Clamping Voltage (VC) @ Ipp=33.0 A | 45.4 V - maximum voltage seen by protected circuit during 10/1000 µs surge; stays below 50 V absolute max ratings of most 3.3 V/5 V logic interfaces. |
| Peak Pulse Power (PPPM) | 3000 W - energy-handling capacity per 10/1000 µs waveform; enables single-device protection against severe load dump events. |
| Reverse Leakage Current (IR) | ≤5 µA @ 28 V - negligible quiescent current draw; preserves battery life in always-connected vehicle modules. |
| AEC-Q101 Qualification | Qualified - validated for automotive under-hood temperature cycling, humidity, mechanical shock, and high-temperature reverse bias life testing. |
Pinout & Package
SMCJ28AQ-13-F uses the industry-standard SMC (DO-214AB) surface-mount package, measuring 5.59–6.22 mm × 6.60–7.11 mm × 2.75–3.18 mm (L×W×H), with gull-wing leads optimized for high-current PCB trace routing and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked Band) | Transient current sink | Connected to protected line (e.g., battery rail); conducts surge current to ground during overvoltage event. |
| Anode | Reference node | Connected to system ground; establishes reference for clamping action and defines unidirectional polarity. |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 Compliance | Validated for Pulses 1, 2a, 2b, and 3 - ensures immunity to real-world automotive transients including alternator load dump and inductive switching noise. |
| ISO 10605 ESD Protection | Withstands ±30 kV air discharge and ±30 kV contact discharge - safeguards interface lines (e.g., USB, LIN) in infotainment head units. |
| High Surge Current Rating | 33.0 A peak pulse current (Ipp) - supports single-device protection without parallel staging in mid-power ECUs like body control modules. |
| Low Clamping Ratio | Vc/Vbr ≈ 1.45 - tight voltage regulation between breakdown and clamping improves margin for 5 V tolerant peripherals. |
Applications
| ADAS Camera Module Power Input | HVAC Blower Motor Control |
|---|---|
Use Scenario: Protects 12 V input of 8 MP camera ECU from alternator load dump and motor back-EMF spikes during ignition cycles. IC Role / Device Role / Timing Role: Unidirectional TVS placed upstream of DC-DC converter input; clamps transients within 1 ns response time. Use Value: Limits voltage to ≤45.4 V during 33 A surges, preventing latch-up or gate oxide rupture in buck controller ICs. |
Use Scenario: Shields H-bridge driver ICs and Hall-effect sensors in HVAC blower assembly from inductive kickback during PWM commutation. IC Role / Device Role / Timing Role: Primary rail protector on 12 V supply line; absorbs repetitive 10/1000 µs pulses up to 3000 W without degradation. Use Value: Eliminates need for external RC snubbers, reducing BOM count and PCB area while maintaining AEC-Q101 reliability. |
| Infotainment USB-C Power Delivery Line | Body Control Module LIN Bus Transceiver |
Use Scenario: Guards 5 V USB-C PD VBUS line against ESD events and hot-swap transients in center console head unit. IC Role / Device Role / Timing Role: Secondary-level TVS after primary 24 V rail protection; handles fast-rising ±30 kV ESD per ISO 10605. Use Value: Maintains <5 µA leakage at 5 V, avoiding false wake-up of USB PHY and preserving sleep-mode current budget. |
Use Scenario: Protects LIN transceiver supply pin (VCC) from battery rail disturbances caused by door lock actuators and window lift motors. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on 12 V-to-5 V LDO input; responds within nanoseconds to ISO 7637-2 Pulse 1. Use Value: Prevents LIN bus timeout errors by holding VCC above 4.5 V during 100 ms transients, ensuring uninterrupted communication. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ28(C)AHM3/I | Same VRWM (28 V), VBR (31.1–34.4 V), VC (45.4 V), but non-AEC-Q101 qualified; higher IR (10 µA max). | Limited to non-automotive industrial use; not PPAP-supported. | Select only for cost-sensitive consumer or industrial designs where automotive qualification is unnecessary. |
| TPSMC28A | Same SMC package, VRWM=28 V, but lower PPPM=1500 W and higher VC=48.4 V at 22 A Ipp. | Insufficient for full ISO 7637-2 Pulse 2b load dump; requires derating or parallel devices. | Use only in auxiliary 12 V subsystems with lower surge exposure, e.g., interior lighting control. |
Compared with SMCJ28(C)AHM3/I and TPSMC28A, the SMCJ28AQ-13-F delivers certified automotive reliability, tighter leakage control, and full 3000 W surge capability - making it the sole choice for safety-critical ADAS and powertrain-adjacent modules requiring zero field failure risk.
Availability
SMCJ28AQ-13-F is available at Aetrix Electronics and suitable for automotive ADAS camera modules, HVAC blower controllers, and infotainment head units requiring stable component supply across multi-year vehicle production programs.
Supply support for SMCJ28AQ-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 company specializing in discrete, analog, and mixed-signal solutions, with design centers in Asia, Europe, and the US, serving automotive, industrial, and consumer markets.
The SMCJ series belongs to Diodes' Automotive Grade TVS portfolio, engineered specifically to meet stringent ISO 7637-2 and AEC-Q101 requirements for under-hood and cabin electronics exposed to harsh electrical environments.
FAQ
Is SMCJ28AQ-13-F compatible with lead-free reflow soldering processes?
Yes. The SMCJ28AQ-13-F is rated for JEDEC J-STD-020D-compliant lead-free reflow profiles, with a maximum peak temperature of 260 °C for 30 seconds. Its SMC package exhibits no warpage or delamination under standard Pb-free thermal cycling, and the device maintains full AEC-Q101 qualification post-reflow.
What is the maximum recommended PCB trace width for the cathode connection?
For sustained 33 A peak pulse current handling, Diodes recommends ≥2.0 mm wide and ≥70 µm thick copper traces on external layers, with direct thermal vias to inner ground planes. Layout guidelines specify minimum 3.5 mm pad length and 1.5 mm pad width to ensure mechanical reliability and thermal dissipation during repeated surge events.
Does SMCJ28AQ-13-F support bidirectional transient suppression?
No. SMCJ28AQ-13-F is a unidirectional TVS diode, intended for clamping positive-going transients on grounded-return systems. For bidirectional protection (e.g., data lines), Diodes offers the SMCJ28(C)AQ variant - which shares identical VRWM and VC specs but adds symmetrical breakdown in both polarities.
How does SMCJ28AQ-13-F perform under extended high-temperature operation?
Rated for continuous operation from –65 °C to +175 °C junction temperature, the device maintains ≤5 µA leakage at 28 V up to 150 °C ambient (with proper PCB thermal design). Life testing shows no parameter shift after 1000 hours at 175 °C, confirming suitability for engine bay and transmission control module placements.
SMCJ28AQ-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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 33A
- 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
SMCJ28AQ-13-F FAQ
1.How can I place an order for SMCJ28AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ28AQ-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 SMCJ28AQ-13-F reliable?
The price and inventory of SMCJ28AQ-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 SMCJ28AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMCJ28AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ28AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ28AQ-13-F?
SMCJ28AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ28AQ-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 SMCJ28AQ-13-F?
For technical support, including SMCJ28AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ28AQ-13-F requirements.
6.How does Aetrix verify that SMCJ28AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMCJ28AQ-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 SMCJ28AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMCJ28AQ-13-F?
All SMCJ28AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ28AQ-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 SMCJ28AQ-13-F part is unused and in its original packaging.
Return procedure for SMCJ28AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ28AQ-13-F Tags
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