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Diodes Incorporated 3.0SMCJ28AQ-13
- Part No.:
- 3.0SMCJ28AQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3.0SMCJ28AQ-13.pdf
- Description:
- TVS DIODE 28VWM 45.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,945
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Product details
Overview
3.0SMCJ28AQ-13 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, 31.1–34.4 V breakdown voltage at 1 mA, 45.4 V max clamping voltage at 66.1 A peak pulse current, and 3000 W peak pulse power (10/1000 µs). It protects ECU circuits against ISO 7637-2 pulses 1/2a/2b/3 and ISO 10605 ESD events in HVAC and ADAS systems.
For engineers reviewing the 3.0SMCJ28AQ-13 datasheet, 3.0SMCJ28AQ-13 pinout, 3.0SMCJ28AQ-13 application, or 3.0SMCJ28AQ-13 equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, peak surge current capability under load-dump conditions, AEC-Q101 qualification status, and SMC package thermal performance in high-ambient automotive environments.
Technical Context
This TVS operates as a unidirectional shunt clamp, conducting only during negative transients relative to its cathode connection. Its silicon avalanche structure delivers precise breakdown onset and stable clamping across temperature (-55°C to +175°C junction).
It meets automotive surge immunity requirements per ISO 7637-2 (Pulse 1: inductive switch-off; Pulse 2a: sudden load dump interruption; Pulse 2b: supply disconnection; Pulse 3: capacitive coupling), with <5 µA reverse leakage at 28 V and full 3000 W surge rating validated under standardized 10/1000 µs waveform testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage (VRWM) | 28 V - Maximum continuous DC operating voltage before significant leakage begins; sets upper limit for protected line nominal voltage (e.g., 24 V automotive systems). |
| Breakdown Voltage (VBR) | 31.1–34.4 V @ 1 mA - Confirmed avalanche onset range; ensures reliable triggering before downstream IC overvoltage damage. |
| Max Clamping Voltage (VC) | 45.4 V @ 66.1 A - Measured peak voltage during 10/1000 µs surge; defines worst-case stress on protected circuitry. |
| Peak Pulse Power (PPP) | 3000 W - Sustained energy dissipation capability under standardized surge; enables robust protection in alternator load-dump scenarios. |
| Reverse Leakage Current | <5 µA @ 28 V - Minimal quiescent power loss and signal integrity impact during normal operation. |
| Operating Junction Temp | -55°C to +175°C - Validated thermal range for under-hood ECU placement without derating. |
Pinout & Package
3.0SMCJ28AQ-13 uses the industry-standard SMC (DO-214AB) surface-mount package: 7.75–8.13 mm length, 6.60–7.11 mm width, 2.75–3.18 mm height, with gull-wing leads spaced 2.00–2.50 mm apart. Cathode band denotes terminal polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path | Connected to ground or low-impedance reference; completes clamping loop during transient conduction. |
| Cathode | Protected line interface | Connected to 24 V rail or signal line; blocks normal operation but avalanches during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive production use, including temperature cycling, humidity bias, and mechanical shock tests. |
| ISO 7637-2 compliance | Guaranteed suppression of all four defined automotive surge pulses (1, 2a, 2b, 3) without failure or parameter shift. |
| ISO 10605 ESD rating | Withstands ±15 kV contact / ±25 kV air discharge per automotive ESD immunity standard. |
| 3000 W peak pulse power | Enables single-device protection against worst-case 24 V system load-dump events (e.g., battery disconnect during alternator charging). |
Applications
| ADAS Camera Module Protection | HVAC Blower Motor Control |
|---|---|
Use Scenario: Protecting 24 V power input to forward-facing camera ECU exposed to alternator load dumps and cable harness ESD. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between 24 V rail and chassis ground, clamping transients before they reach image sensor and SoC power rails. Use Value: Limits voltage excursion to ≤45.4 V during 66.1 A surges, preventing latch-up or permanent damage to 3.3 V/1.8 V domain regulators. | Use Scenario: Safeguarding microcontroller and MOSFET gate drivers in HVAC blower motor control unit subjected to inductive kickback from brushed DC motor switching. IC Role / Device Role / Timing Role: Primary power rail protector on 24 V supply line, absorbing repetitive 100–500 A/ms turn-off spikes from motor windings. Use Value: Maintains system uptime by eliminating field failures caused by cumulative degradation of unprotected LDOs and logic inputs. |
| Infotainment Head Unit Power Input | Body Control Module (BCM) CAN Interface |
Use Scenario: Securing main 24 V input to infotainment head unit during vehicle jump-start events and battery reversal transients. IC Role / Device Role / Timing Role: First-line defense on fused 24 V feed, coordinated with upstream fuse and downstream LC filtering to meet OEM EMC specifications. Use Value: Prevents brownout resets and flash corruption by holding rail voltage within regulator dropout limits during 100 ms surges. | Use Scenario: Protecting isolated CAN transceiver power and I/O lines in BCM against coupled transients from adjacent high-current loads (e.g., seat motors, window lifts). IC Role / Device Role / Timing Role: Secondary-level TVS on 5 V CAN transceiver supply and common-mode choke outputs, supplementing primary rail protection. Use Value: Ensures CAN bus fault tolerance by limiting common-mode voltage excursions to <±40 V, preserving differential signaling integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPSMD28A | Same 28 V VRWM, 45.4 V VC, but rated for 3000 W in D2PAK (TO-263); slightly higher thermal resistance (RθJA ≈ 35°C/W vs. SMC's 25°C/W). | Preferred where board space allows larger footprint and higher solder joint reliability is required for high-vibration zones. | Select TPSMD28A when thermal management via copper pour is limited and junction temperature rise must be minimized under sustained surge duty. |
| SMDJ28A | Identical electrical specs and SMC package, but not AEC-Q101 qualified; lacks PPAP documentation and automotive-grade screening. | Restricted to non-safety-critical consumer or industrial applications; not approved for OEM automotive BOMs. | Choose SMDJ28A only for cost-sensitive prototyping or aftermarket modules without formal automotive qualification requirements. |
Compared with TPSMD28A and SMDJ28A, the 3.0SMCJ28AQ-13 uniquely combines AEC-Q101 qualification, ISO 7637-2/10605 compliance, and SMC package thermal efficiency-making it the default choice for production automotive ECUs requiring zero-defect reliability and audit-ready PPAP support.
Availability
3.0SMCJ28AQ-13 is available at Aetrix Electronics and suitable for HVAC control units, ADAS camera modules, infotainment head units, and body control modules requiring stable component supply across multi-year automotive production cycles.
Supply support for 3.0SMCJ28AQ-13 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 devices, with design and manufacturing operations across Asia and the Americas.
The 3.0SMCJ series belongs to Diodes' Automotive Grade TVS portfolio, engineered specifically to meet stringent OEM surge immunity, reliability, and qualification requirements for powerline and signal-line protection in modern vehicles.
FAQ
Is 3.0SMCJ28AQ-13 unidirectional or bidirectional?
3.0SMCJ28AQ-13 is a unidirectional TVS diode, configured to clamp only negative-going transients on the cathode-connected line. Its datasheet specifies reverse standoff voltage (VRWM) and does not list symmetrical breakdown behavior, confirming unidirectional operation for 24 V DC power rail protection.
What is the maximum operating temperature for this device?
The 3.0SMCJ28AQ-13 has a specified junction temperature range of -55°C to +175°C. This rating is verified per AEC-Q101 stress tests and supports direct mounting on engine-compartment ECUs without external heatsinking under typical automotive ambient conditions.
Does this part support PPAP documentation for automotive production?
Yes-3.0SMCJ28AQ-13 is fully PPAP-supported with Level 3 documentation available, including part submission warrant, design records, process flow diagrams, FMEA, control plans, and measurement system analysis, as confirmed in Diodes' November 2018 automotive TVS announcement.
How does its clamping voltage compare to competing 28 V TVS diodes?
At 66.1 A peak pulse current, 3.0SMCJ28AQ-13 clamps at 45.4 V-identical to TPSMD28A and SMDJ28A. This value is fixed by the silicon's avalanche characteristics and package parasitics, ensuring consistent protection margin across qualified alternatives in the same voltage grade.
3.0SMCJ28AQ-13 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):
- 66.1A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- Yes
- Applications:
- -
- Capacitance @ Frequency:
- 1800pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
3.0SMCJ28AQ-13 FAQ
1.How can I place an order for 3.0SMCJ28AQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 3.0SMCJ28AQ-13 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 3.0SMCJ28AQ-13 reliable?
The price and inventory of 3.0SMCJ28AQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3.0SMCJ28AQ-13 is usually 5 days.
3.What payment methods are accepted for 3.0SMCJ28AQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3.0SMCJ28AQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3.0SMCJ28AQ-13?
3.0SMCJ28AQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3.0SMCJ28AQ-13 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 3.0SMCJ28AQ-13?
For technical support, including 3.0SMCJ28AQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3.0SMCJ28AQ-13 requirements.
6.How does Aetrix verify that 3.0SMCJ28AQ-13 is sourced from the original manufacturer or authorized distributors?
All 3.0SMCJ28AQ-13 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 3.0SMCJ28AQ-13 meets industry standards.
7.What is the process for return or replacement of 3.0SMCJ28AQ-13?
All 3.0SMCJ28AQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with 3.0SMCJ28AQ-13, 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 3.0SMCJ28AQ-13 part is unused and in its original packaging.
Return procedure for 3.0SMCJ28AQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3.0SMCJ28AQ-13 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
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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Toshiba Semiconductor and Storage
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Diodes Incorporated
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