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Diodes Incorporated SMCJ51AQ-13-F
- Part No.:
- SMCJ51AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ51AQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMC
- Quantity:
- Payment:
- Shipping:
Inventory:3,117
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Product details
Overview
SMCJ51AQ-13-F from Diodes Incorporated is a unidirectional 1,500W automotive-grade transient voltage suppressor (TVS) diode with 51V reverse standoff voltage (VRWM), 82.4V max clamping voltage (VC) at 18.2A peak pulse current, and AEC-Q101 qualification for under-hood electronics protection against ISO7637-2 Pulse 1/2a/3a/3b and ISO10605 ESD events.
For engineers reviewing the SMCJ51AQ-13-F datasheet, SMCJ51AQ-13-F pinout, SMCJ51AQ-13-F application, or SMCJ51AQ-13-F equivalent, this part supports high-reliability surge suppression in 12V/24V automotive power rails, infotainment interfaces, and CAN/LIN bus protection where fast response (<1 ns), low clamping ratio (1.62), and IATF 16949-manufactured consistency are required.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds 51V VRWM and fully clamping within nanoseconds to limit transients to ≤82.4V at 18.2A (10/1000μs waveform). Its glass-passivated die ensures stable breakdown and low leakage (≤5μA @ 51V).
Designed for automotive environments, it sustains -55°C to +150°C junction temperature, handles 200A non-repetitive forward surge (8.3ms half-sine), and delivers 5W steady-state power dissipation at TL = +75°C - enabling robust placement near ECUs, body controllers, and ADAS sensors without thermal derating concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W - withstands severe ISO7637-2 Pulse 1 (-100V) and Pulse 3a (-150V) without failure |
| Reverse Standoff Voltage | 51V - blocks normal 12V/24V system operating voltages while remaining inactive |
| Max Clamping Voltage | 82.4V @ 18.2A - limits transient overvoltage to safe levels for downstream 60V-rated ICs |
| Breakdown Voltage | 56.7–62.7V @ 1mA - tight VBR tolerance ensures predictable turn-on across temperature |
| Leakage Current | ≤5μA @ 51V - negligible standby power loss and no interference with low-current sensor signals |
| Response Time | <1.0 ns - clamps before most microcontrollers or transceivers can be damaged by ESD |
| Operating Temp Range | -55°C to +150°C - qualified for engine bay, transmission control, and brake module mounting |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic (UL 94V-0), 0.21g weight, cathode band polarity indicator. Moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Banded End) | Transient Current Sink | Connected to protected line; conducts surge current to ground during overvoltage |
| Anode | Reference / Ground Return | Typically tied to chassis or power ground; completes clamping path for unidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive use with PPAP capability and IATF 16949 manufacturing control |
| Glass Passivated Die | Enhances long-term reliability and stability of breakdown voltage under thermal cycling |
| 1,500W Peak Pulse Rating | Supports full ISO7637-2 compliance including worst-case Pulse 1 (-100V) and Pulse 3a (-150V) |
| RoHS & Halogen-Free | Meets EU RoHS 3 (2015/863/EU) and Diodes' "Green" definition (<900ppm Br/Cl, <1000ppm Sb) |
| Fast Response & Low Clamping Ratio | Clamping ratio VC/VRWM = 1.62 enables protection of 60V-rated components on 24V systems |
Applications
| Engine Control Unit (ECU) Power Input | Body Control Module (BCM) LIN Bus |
|---|---|
Use Scenario: Protects 12V supply rail of gasoline/diesel engine ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and input filter capacitor to clamp surges before DC-DC regulators. Use Value: Withstands 200A surge (8.3ms) and clamps to 82.4V, preventing damage to 65V-input buck converters and MCU power pins. | Use Scenario: Shields LIN physical layer transceivers from ESD and coupled noise in door modules and seat controls. IC Role / Device Role / Timing Role: TVS connected between LIN bus line and ground, activated only during >51V transients to avoid signal distortion. Use Value: 5μA leakage preserves LIN's 1mA sleep current budget; sub-ns response prevents bit errors during 20kV contact discharge. |
| Advanced Driver Assistance Systems (ADAS) Camera Power | Electric Power Steering (EPS) Motor Driver Supply |
Use Scenario: Safeguards 12V input of rear-view or surround-view camera modules exposed to ignition noise and hot-swap events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on camera module PCB, mounted adjacent to connector to intercept transients at entry point. Use Value: 1500W rating handles repeated ISO7637-2 Pulse 3b (+100V) during vehicle start-stop cycles without degradation. | Use Scenario: Protects H-bridge gate drivers and current sense amplifiers in EPS motor control units from inductive kickback. IC Role / Device Role / Timing Role: TVS placed across motor supply rail (VDD_MOTOR) to clamp flyback energy from brushed/BLDC motor windings. Use Value: 82.4V clamping ensures gate drivers rated for 100V absolute maximum survive 24V system load dump events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC51-13-F | Same SMC package, 51V VRWM, but lower 600W PPK rating and higher 93V clamping voltage | Limited to less severe transients (e.g., interior modules); not ISO7637-2 Pulse 1 compliant | Select only for cost-sensitive non-critical 12V circuits where full 1500W immunity is unnecessary |
| 1.5SMC51A-Q | Same 51V/1500W specs, but manufactured by ON Semiconductor with different AEC-Q101 test report structure | Identical functional performance; accepted in legacy designs requiring dual-source procurement | Choose when supply chain diversification is mandated without changing board layout or validation data |
Compared with SAC51-13-F and 1.5SMC51A-Q, SMCJ51AQ-13-F provides superior clamping (82.4V vs. 93V) and guaranteed ISO7637-2 Pulse 1 compliance - critical for engine bay and safety-critical EPS/brake applications where margin matters.
Availability
SMCJ51AQ-13-F is available at Aetrix Electronics and suitable for automotive power rail protection, ADAS sensor interface hardening, and body electronics surge suppression requiring stable component supply across multi-year vehicle production programs.
Supply support for SMCJ51AQ-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.
The SMCJ series belongs to Diodes' AEC-Q101-qualified automotive TVS portfolio, engineered specifically for ISO7637-2 and ISO10605 compliance in harsh-temperature, high-surge environments like powertrain and chassis control systems.
FAQ
Is SMCJ51AQ-13-F bidirectional or unidirectional?
SMCJ51AQ-13-F is unidirectional, indicated by the absence of the 'C' suffix (which denotes bidirectional versions like SMCJ51CAQ-13-F). It features a cathode band and clamps only during reverse overvoltage events - ideal for DC power rail protection where polarity is fixed.
What is the maximum clamping voltage at rated peak pulse current?
The maximum clamping voltage is 82.4V at 18.2A peak pulse current (IPP), measured using the standard 10×1000μs waveform per REA and IEC 61000-4-5. This value is guaranteed across -55°C to +150°C junction temperature per the datasheet's electrical characteristics table.
Does SMCJ51AQ-13-F require derating at elevated ambient temperatures?
Yes - its 1500W peak pulse power is specified at TA = +25°C and must be derated linearly above that temperature, following the pulse derating curve in Figure 1 of DS40741 Rev. 8-2. At +85°C ambient, usable peak power drops to approximately 1050W, preserving safe operation without thermal runaway.
Can SMCJ51AQ-13-F be used in 24V commercial vehicle systems?
Yes - its 51V VRWM and 82.4V clamping voltage provide 12V overhead margin above typical 24V nominal systems (28V max), making it suitable for trucks, buses, and off-highway equipment complying with ISO7637-2 Pulse 1 (-100V) and Pulse 2a (+50V) requirements.
SMCJ51AQ-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):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 18.2A
- 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
SMCJ51AQ-13-F FAQ
1.How can I place an order for SMCJ51AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ51AQ-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 SMCJ51AQ-13-F reliable?
The price and inventory of SMCJ51AQ-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 SMCJ51AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMCJ51AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ51AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ51AQ-13-F?
SMCJ51AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ51AQ-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 SMCJ51AQ-13-F?
For technical support, including SMCJ51AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ51AQ-13-F requirements.
6.How does Aetrix verify that SMCJ51AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMCJ51AQ-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 SMCJ51AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMCJ51AQ-13-F?
All SMCJ51AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ51AQ-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 SMCJ51AQ-13-F part is unused and in its original packaging.
Return procedure for SMCJ51AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ51AQ-13-F 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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