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Diodes Incorporated 3.0SMCJ20AQ-13
- Part No.:
- 3.0SMCJ20AQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3.0SMCJ20AQ-13.pdf
- Description:
- TVS DIODE 20VWM 32.4VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,752
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Product details
Overview
3.0SMCJ20AQ-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 20 V reverse standoff voltage, 22.2–24.5 V breakdown voltage at 1 mA, 32.4 V clamping voltage at 92.6 A peak pulse current (10/1000 µs), and 3000 W peak pulse power dissipation. It protects ECUs in HVAC, ADAS, and infotainment systems against ISO 7637-2 pulses and ISO 10605 ESD events.
For engineers reviewing the 3.0SMCJ20AQ-13 datasheet, 3.0SMCJ20AQ-13 pinout, 3.0SMCJ20AQ-13 application, or 3.0SMCJ20AQ-13 equivalent, key selection criteria include clamping voltage margin relative to system rail, peak surge current capability under load dump conditions, AEC-Q101 qualification status, and SMC package thermal performance in high-reliability automotive PCB layouts.
Technical Context
This TVS operates as a unidirectional shunt protector, triggered when reverse voltage exceeds its 22.2 V minimum breakdown threshold. Its low 32.4 V clamping voltage at 92.6 A ensures sensitive downstream ICs remain below absolute maximum ratings during ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2a (battery disconnection).
Designed for 12 V automotive systems, it withstands repetitive surges up to 3000 W (10/1000 µs) and exhibits ≤5 µA leakage at 20 V VRWM. Compliance with ISO 10605 (±15 kV contact / ±25 kV air discharge) confirms robustness against human-body-model ESD events in vehicle cabin environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Standoff Voltage (VRWM) | 20 V - Maximum continuous DC operating voltage before significant leakage; sets upper limit for 12 V rail protection without false triggering. |
| Breakdown Voltage (VBR) | 22.2–24.5 V @ 1 mA - Confirmed avalanche initiation range; ensures reliable turn-on before system overvoltage damages microcontrollers or CAN transceivers. |
| Clamping Voltage (VC) | 32.4 V @ 92.6 A - Measured peak voltage across device during 10/1000 µs surge; guarantees protected ICs see <33 V during worst-case load dump. |
| Peak Pulse Power (PPPM) | 3000 W - Sustained energy-handling capacity per IEC 61000-4-5 waveform; enables single-device protection of high-current ECU power inputs. |
| Package | SMC (DO-214AB) - 7.75–8.13 mm length, 6.60–7.11 mm width, 2.75–3.18 mm height; provides superior thermal dissipation vs. SMA/SMB for sustained surge duty cycles. |
| AEC-Q101 Qualification | Qualified - Validated for automotive temperature range (−55 °C to +175 °C junction), humidity, mechanical shock, and board-level reliability per AEC standard. |
Pinout & Package
3.0SMCJ20AQ-13 uses the SMC (DO-214AB) surface-mount package with two terminals: Cathode (K) and Anode (A). The cathode band denotes the marked end; polarity is critical for unidirectional operation in DC power line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (K) | Surge current sink node | Connected to protected power rail (e.g., +12 V); conducts transient current to ground during overvoltage events. |
| Anode (A) | Reference node | Connected to system ground; establishes reference for clamping action and defines unidirectional conduction direction. |
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 rating | ±15 kV contact / ±25 kV air discharge - Protects against electrostatic discharge in assembly, service, and cabin environments without external shielding. |
| High surge current capability | 92.6 A peak (10/1000 µs) - Supports protection of high-power modules like HVAC actuators and ADAS radar supplies without derating. |
| Low clamping ratio | VC/VRWM = 1.62 - Minimizes voltage overshoot margin required in system design, enabling tighter supply rail tolerances. |
Applications
| ADAS Camera Module Protection | HVAC Blower Motor Control |
|---|---|
Use Scenario: Front-facing camera ECU powered from vehicle battery experiences load dump transients during alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +12 V input and chassis ground, clamping surges before they reach image sensor and ISP power rails. Use Value: 32.4 V clamping ensures camera SoC (rated to 3.6 V core, 12 V analog input) remains within safe operating area during 100 V/100 ms load dump events. | Use Scenario: HVAC blower motor driver PCB subjected to inductive kickback when PWM-controlled MOSFETs switch off. IC Role / Device Role / Timing Role: TVS installed at motor driver power input to absorb reverse EMF spikes generated by motor windings. Use Value: 3000 W peak power rating handles repetitive 50–100 A surge currents typical of 200 W blower motors without degradation over 15-year vehicle life. |
| Infotainment Head Unit Power Input | Body Control Module (BCM) LIN Bus Interface |
Use Scenario: Infotainment head unit exposed to ESD during user interaction with touchscreen and USB ports, plus battery reversal during jump-start attempts. IC Role / Device Role / Timing Role: Primary front-end TVS on main 12 V supply rail, coordinated with secondary TVS on USB VBUS and audio lines. Use Value: AEC-Q101 qualification and ≤5 µA leakage at 20 V ensure long-term stability in hot-cabin environments (>85 °C ambient) without standby current penalty. | Use Scenario: BCM LIN transceiver IC subjected to coupled transients from nearby high-current loads (e.g., door lock actuators) via shared ground paths. IC Role / Device Role / Timing Role: TVS placed on LIN bus power rail (typically +12 V) to suppress common-mode surges before they couple into LIN PHY circuitry. Use Value: 22.2–24.5 V VBR range avoids false triggering during normal LIN bus voltage fluctuations (9–16 V), while clamping fast edges below transceiver damage threshold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPSMD20A | Same 20 V VRWM, 32.4 V VC, but rated for 3000 W at 10/1000 µs; slightly higher VBR min (22.8 V) and lower Ipp (89.3 A). | Also AEC-Q101 qualified; identical SMC package; optimized for TI ecosystem designs with tighter VBR tolerance. | Select if sourcing from TI-designated supply chain or requiring TI-specific PPAP documentation. |
| SMDJ20A | Same VRWM and VC, but rated for 3000 W at 10/1000 µs; VBR range 22.2–24.5 V matches exactly; Ipp = 92.6 A identical. | Manufactured by Littelfuse; identical AEC-Q101 qualification and ISO standards compliance; same thermal footprint. | Preferred for dual-sourcing strategies where second-source validation is required without layout or BOM change. |
Compared with TPSMD20A and SMDJ20A, the 3.0SMCJ20AQ-13 offers identical clamping performance and surge rating but differs in manufacturer-specific qualification documentation and minor VBR distribution-making it suitable for Diodes Incorporated-based automotive platforms where full PPAP support is mandated.
Availability
3.0SMCJ20AQ-13 is available at Aetrix Electronics and suitable for ADAS camera modules, HVAC blower controllers, and infotainment head units requiring stable component supply across multi-year automotive production programs.
Supply support for 3.0SMCJ20AQ-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 strong focus on automotive, industrial, and computing markets.
The 3.0SMCJ series belongs to Diodes' Automotive Grade TVS portfolio, engineered specifically for robust powerline protection in harsh automotive environments-including extended temperature operation, high-reliability packaging, and full AEC-Q101 qualification.
FAQ
Is 3.0SMCJ20AQ-13 bidirectional or unidirectional?
3.0SMCJ20AQ-13 is a unidirectional TVS diode, designed for DC power line protection where polarity is fixed. Its cathode terminal connects to the protected positive rail, and anode to ground. It does not conduct in forward bias under normal operation, unlike bidirectional variants used for AC or data-line protection.
What is the maximum junction temperature rating?
The 3.0SMCJ20AQ-13 has a maximum junction temperature of +175 °C, validated per AEC-Q101 stress testing. This allows reliable operation in under-hood and near-engine ECU locations where ambient temperatures exceed +125 °C, provided PCB copper area and airflow meet thermal design guidelines in Diodes' AN107 application note.
Does this part support PPAP documentation?
Yes-3.0SMCJ20AQ-13 is supported by full Production Part Approval Process (PPAP) documentation, including dimensional reports, material certifications, test data summaries, and process flow diagrams. Diodes Incorporated provides PPAP Level 3 packages upon request for automotive Tier 1 customers.
How does its clamping voltage compare to SMAJ20AQ?
Both 3.0SMCJ20AQ-13 and SMAJ20AQ have identical 32.4 V clamping voltage at rated Ipp, but the 3.0SMCJ version sustains 3000 W vs. SMAJ's 400 W due to larger SMC package thermal mass. This makes 3.0SMCJ20AQ-13 suitable for high-energy load dump events where SMAJ20AQ would fail thermally under repeated surges.
3.0SMCJ20AQ-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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 92.6A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- Yes
- Applications:
- -
- Capacitance @ Frequency:
- 3300pF @ 1MHz
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
3.0SMCJ20AQ-13 FAQ
1.How can I place an order for 3.0SMCJ20AQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 3.0SMCJ20AQ-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 3.0SMCJ20AQ-13 reliable?
The price and inventory of 3.0SMCJ20AQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3.0SMCJ20AQ-13 is usually 5 days.
3.What payment methods are accepted for 3.0SMCJ20AQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3.0SMCJ20AQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3.0SMCJ20AQ-13?
3.0SMCJ20AQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3.0SMCJ20AQ-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 3.0SMCJ20AQ-13?
For technical support, including 3.0SMCJ20AQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3.0SMCJ20AQ-13 requirements.
6.How does Aetrix verify that 3.0SMCJ20AQ-13 is sourced from the original manufacturer or authorized distributors?
All 3.0SMCJ20AQ-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 3.0SMCJ20AQ-13 meets industry standards.
7.What is the process for return or replacement of 3.0SMCJ20AQ-13?
All 3.0SMCJ20AQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with 3.0SMCJ20AQ-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 3.0SMCJ20AQ-13 part is unused and in its original packaging.
Return procedure for 3.0SMCJ20AQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3.0SMCJ20AQ-13 Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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