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Diodes Incorporated 3.0SMCJ51AQ-13
- Part No.:
- 3.0SMCJ51AQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
3.0SMCJ51AQ-13.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,318
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Product details
Overview
3.0SMCJ51AQ-13 from Diodes Incorporated is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode with 51V reverse standoff voltage, 82.4V max clamping voltage at 36.4A peak pulse current, and IEC-61000-4-2 ESD protection (30kV air/30kV contact). It protects DC power rails and signal lines in automotive infotainment power supplies against lightning-induced surges and ESD events.
For engineers reviewing the 3.0SMCJ51AQ-13 datasheet, 3.0SMCJ51AQ-13 pinout, 3.0SMCJ51AQ-13 application, or 3.0SMCJ51AQ-13 equivalent, key selection criteria include clamping voltage margin relative to protected IC VMAX, peak pulse current handling under ISO 7637-2 Pulse 1/2b, SMC package thermal dissipation on 8mm² copper, and AEC-Q101 qualification status for automotive deployment.
Technical Context
This TVS operates as a voltage-clamping overvoltage protector using avalanche breakdown. Its glass-passivated junction ensures stable breakdown characteristics across -55°C to +150°C operating range and supports single-pulse surge handling up to 3000W per 10×1000μs waveform.
Designed for unidirectional DC line protection, it features a cathode band marking, 5μA max reverse leakage at 51V VRWM, and complies with JEDEC high-reliability standards for automotive-grade components. Thermal derating follows Fig. 1: 50% power capability at +100°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 3000W - sustains 10×1000μs transients without failure; defines maximum energy absorption capability |
| Reverse Standoff Voltage (VRWM) | 51V - maximum continuous DC voltage before significant leakage; sets minimum system operating voltage margin |
| Max Clamping Voltage (VC) | 82.4V @ 36.4A - upper voltage limit imposed on protected circuit during surge; must stay below downstream IC absolute max rating |
| Breakdown Voltage (VBR) | 56.7–62.7V @ 1mA - onset of avalanche conduction; defines transition point from high-impedance to low-impedance clamping state |
| ESD Rating | 30kV air / 30kV contact per IEC-61000-4-2 - qualifies for direct human interaction points like USB ports or display interfaces |
| Operating Temperature | -55°C to +150°C - supports under-hood automotive environments and industrial control cabinets without derating |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic body with UL 94V-0 flammability rating; 0.21g mass; matte tin-plated leads solderable per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected line | Connected to ground or return path; forms current sink during surge event |
| Cathode | High-side connection to protected line | Marked with cathode band; connects to positive rail or signal line requiring clamping |
Key Features
| Feature | Design Value |
|---|---|
| 3000W peak pulse power | Enables robust protection against ISO 7637-2 Pulse 1 (inductive load dump) and lightning-simulated surges in 12V/24V systems |
| Glass-passivated die construction | Ensures long-term parameter stability and low leakage drift over temperature and lifetime, critical for automotive reliability |
| AEC-Q101 qualified | Validated for automotive applications including engine control units, ADAS camera modules, and infotainment power inputs |
| RoHS-compliant, halogen-free "Green" device | Meets EU Directive 2015/863/EU with <900ppm Br, <900ppm Cl, <1000ppm Sb; supports eco-design compliance programs |
Applications
| Automotive Infotainment Power Input | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12V supply line feeding head unit main processor and display backlight drivers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input fuse and DC-DC converter input capacitor. Use Value: Clamps ISO 7637-2 Pulse 1 (−150V/50Ω) to ≤82.4V, preventing damage to 100V-rated input MOSFETs and enabling single-stage protection architecture. |
Use Scenario: 24V digital input channel receiving signals from external sensors in factory automation. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting induced transients before optocoupler input stage. Use Value: Limits voltage excursion to <85V during 1kV/500Ω surge (IEC 61000-4-4), preserving optocoupler CTR and eliminating need for series current-limiting resistor. |
| Telecom PoE Data Line Surge Protection | Medical Imaging Equipment DC Rail Guard |
Use Scenario: 48V power sourcing equipment (PSE) port in IEEE 802.3af/at switch. IC Role / Device Role / Timing Role: Bidirectional-capable variant used on data pair; this unidirectional version applied on power feed path only. Use Value: Absorbs 3000W common-mode surge while maintaining <10μA leakage at 48V, ensuring minimal impact on PD detection signature. |
Use Scenario: ±15V analog front-end supply for MRI gradient amplifier control logic. IC Role / Device Role / Timing Role: TVS placed on each rail adjacent to LDO input, referenced to local ground plane. Use Value: Clamps fast-rising ESD events (IEC 61000-4-2) to <85V, protecting precision op-amps with 16V absolute max ratings without compromising noise performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51A (Diodes Inc.) | 600W rating, SMB package, 87.1V clamping at 6.9A - lower power density and higher VC | Acceptable for low-energy surges (e.g., HBM-only ESD); insufficient for ISO 7637-2 Pulse 1 | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 only |
| 1.5SMCJ51A (ON Semiconductor) | Same 3000W rating and 51V VRWM, but not AEC-Q101 qualified; 84.5V clamping at 35.5A | Lacks automotive qualification documentation and PPAP support; suitable for industrial/commercial use only | Choose for cost-sensitive non-automotive designs where AEC-Q101 is not mandated |
Compared with SMBJ51A, 3.0SMCJ51AQ-13 delivers 5× higher surge energy handling and tighter clamping; versus 1.5SMCJ51A, it adds AEC-Q101 qualification and traceable IATF 16949 manufacturing-critical for Tier 1 automotive BOMs.
Availability
3.0SMCJ51AQ-13 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial programmable logic controllers, and medical imaging equipment requiring stable component supply with full automotive qualification traceability.
Supply support for 3.0SMCJ51AQ-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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The 3.0SMCJ series belongs to Diodes' automotive-grade TVS portfolio, engineered specifically for AEC-Q101 compliance and high-energy transient suppression in harsh environment applications such as powertrain, chassis, and body electronics.
FAQ
What does the 'Q' suffix in 3.0SMCJ51AQ-13 signify?
The 'Q' suffix indicates AEC-Q101 qualification, meaning the device has passed stress tests for temperature cycling, high-temperature operating life, and electrostatic discharge specific to automotive semiconductor reliability standards. It also confirms production in an IATF 16949-certified facility with full PPAP documentation support.
Can 3.0SMCJ51AQ-13 be used in bidirectional configurations?
No - the 'A' in the part number denotes unidirectional operation, confirmed by the cathode band marking and electrical specifications optimized for DC line protection. For bidirectional protection, select the 'CA' variant (e.g., 3.0SMCJ51CA-13), which lacks polarity marking and supports symmetrical clamping on AC or differential lines.
How does thermal derating affect surge capability at elevated temperatures?
Per Figure 1 in DS30818, peak pulse power drops linearly from 100% at +25°C to ~50% at +100°C ambient. At +125°C, it retains ~35% of rated 3000W capacity. PCB layout with ≥8mm² copper pad per terminal is required to maintain specified derating curves.
Is lead time impacted by automotive qualification requirements?
No - Aetrix Electronics maintains dedicated inventory of AEC-Q101-qualified parts including 3.0SMCJ51AQ-13, with standard lead times of 4–6 weeks. Extended volume orders benefit from consignment stocking and quarterly forecast-based allocation aligned with customer production schedules.
3.0SMCJ51AQ-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AB, SMC
- Series:
- 3.0SMCJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 36.4A
- Power - Peak Pulse:
- 3000W (3kW)
- 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
3.0SMCJ51AQ-13 FAQ
1.How can I place an order for 3.0SMCJ51AQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 3.0SMCJ51AQ-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 3.0SMCJ51AQ-13 reliable?
The price and inventory of 3.0SMCJ51AQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 3.0SMCJ51AQ-13 is usually 5 days.
3.What payment methods are accepted for 3.0SMCJ51AQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 3.0SMCJ51AQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 3.0SMCJ51AQ-13?
3.0SMCJ51AQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 3.0SMCJ51AQ-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 3.0SMCJ51AQ-13?
For technical support, including 3.0SMCJ51AQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 3.0SMCJ51AQ-13 requirements.
6.How does Aetrix verify that 3.0SMCJ51AQ-13 is sourced from the original manufacturer or authorized distributors?
All 3.0SMCJ51AQ-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 3.0SMCJ51AQ-13 meets industry standards.
7.What is the process for return or replacement of 3.0SMCJ51AQ-13?
All 3.0SMCJ51AQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with 3.0SMCJ51AQ-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 3.0SMCJ51AQ-13 part is unused and in its original packaging.
Return procedure for 3.0SMCJ51AQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
3.0SMCJ51AQ-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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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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