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Diodes Incorporated SMCJ120AQ-13-F
- Part No.:
- SMCJ120AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ120AQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:3,470
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Product details
Overview
SMCJ120AQ-13-F from Diodes Incorporated is a unidirectional 120V standoff, 1500W peak pulse power automotive TVS diode in SMC package, with 193V max clamping voltage at 7.9A peak pulse current, AEC-Q101 qualified and compliant with ISO7637-2 Pulse 1 (–100V), Pulse 2a (+50V), Pulse 3a (–150V), and ISO10605 ESD (±30kV). It protects CAN/FlexRay bus interfaces and engine control unit power rails.
For engineers reviewing the SMCJ120AQ-13-F datasheet, SMCJ120AQ-13-F pinout, SMCJ120AQ-13-F application, or SMCJ120AQ-13-F equivalent, key selection criteria include clamping voltage margin vs. system rail, IEC/ISO surge waveform compatibility, AEC-Q101 qualification status, SMC package thermal performance under pulsed stress, and unidirectional polarity for DC-biased lines.
Technical Context
This TVS diode operates as a voltage-clamped transient shunt: when reverse voltage exceeds 120V standoff, it avalanches to clamp transients up to 193V while diverting up to 7.9A (10/1000μs waveform). Its 3.5V forward voltage at 100A enables low-loss crowbar operation during severe surges.
Designed for automotive environments, it sustains –55°C to +175°C junction temperature, supports 200A non-repetitive surge (8.3ms half-sine), and maintains <0.5μA leakage at VRWM - critical for low-power always-on modules like body control units and telematics gateways.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W - handles ISO7637-2 Pulse 1 (–100V) without failure under worst-case load dump conditions |
| Reverse Standoff Voltage (VRWM) | 120V - sets minimum operating margin above 12V nominal automotive battery rail (up to ~14.8V float) |
| Max Clamping Voltage (VC) | 193V @ 7.9A - ensures downstream 200V-rated MOSFETs and regulators remain within safe operating area |
| Breakdown Voltage (VBR) | 133–147V @ 1mA - guarantees reliable turn-on before system overvoltage damage occurs |
| Leakage Current (IR) | <0.5μA @ 120V - prevents excessive quiescent drain in battery-sensitive modules (e.g., alarm systems) |
| Operating Temperature | –55°C to +175°C - supports under-hood placement near engines and transmission control units |
| AEC-Q101 Qualified | Yes - validated for automotive use with PPAP capability and IATF 16949 manufacturing |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic (UL 94V-0), 0.21g weight, cathode band polarity indicator, matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance chassis return; completes clamping loop during surge events |
| Cathode | Protected line connection | Connected to 12V/24V supply rail or signal line; clamps to anode when voltage exceeds VRWM |
Key Features
| Feature | Design Value |
|---|---|
| 1500W Peak Pulse Power | Withstands ISO7637-2 Pulse 1 (–100V) on 12V systems without degradation across full temperature range |
| Fast Response Time | <1ps avalanche initiation enables clamping before transient energy couples into sensitive analog front-ends |
| AEC-Q101 Qualification | Validated for automotive life-cycle stress including temperature cycling, HTRB, and ESD robustness per JESD47 |
| RoHS & Halogen-Free | Meets EU RoHS 3 (2015/863/EU) and Diodes' "Green" definition (<900ppm Br/Cl, <1000ppm Sb) |
| Moisture Sensitivity Level | MSL 1 (per J-STD-020) - no floor life limitation; suitable for standard SMT reflow without baking |
Applications
| Engine Control Unit (ECU) Power Input | CAN Bus Transceiver Protection |
|---|---|
Use Scenario: 12V battery feed to microcontroller power supply in gasoline/diesel engine ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS shunt clamping device placed upstream of LDOs and DC-DC converters. Use Value: Limits transient voltage to ≤193V, preventing latch-up or gate oxide rupture in 200V-rated power FETs and PMICs. |
Use Scenario: Protection of high-speed CAN FD transceivers (e.g., TJA1044) against coupled ESD and ISO7637-2 Pulse 3b (+100V) on data lines. IC Role / Device Role / Timing Role: Line-side transient suppressor between connector and transceiver pins, referenced to local ground. Use Value: Clamps sub-100ns ESD events to <25V peak, preserving signal integrity and avoiding bit errors during CAN arbitration. |
| Body Control Module (BCM) LIN Bus | Telematics Control Unit (TCU) Cellular Antenna Feed |
Use Scenario: LIN physical layer (12V biased) in door modules and lighting controllers subjected to cable discharge events per ISO10605. IC Role / Device Role / Timing Role: Unidirectional clamping diode on LIN bus line, with cathode tied to 12V rail and anode to ground. Use Value: Absorbs ±30kV contact discharge energy while maintaining <1μA leakage to avoid LIN sleep-mode current violations. |
Use Scenario: Surge protection on cellular antenna feed line entering TCU housing, exposed to induced transients from nearby ignition systems. IC Role / Device Role / Timing Role: DC-blocking TVS placed after bias-T, clamping common-mode surges before low-noise amplifier input. Use Value: Limits RF front-end overvoltage to <200V, preventing permanent damage to 250V-rated GaAs pHEMT LNAs without degrading insertion loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC120-120A | Same 120V VRWM, but 1200W PPK and higher 215V VC @ 7.0A; TO-277 package | Larger thermal mass but lower surge handling; requires different PCB layout and heatsinking | Prefer for cost-sensitive non-critical modules where 1500W headroom is unnecessary |
| TPSMA120A | 120V VRWM, 600W PPK, 193V VC @ 3.1A; SMA package with lower IFSM (100A) | Lower surge rating and smaller footprint; not AEC-Q101 qualified | Select only for non-automotive industrial controls with milder ISO10605 requirements |
Compared with SAC120-120A and TPSMA120A, SMCJ120AQ-13-F delivers superior 1500W surge capacity and guaranteed AEC-Q101 compliance in the industry-standard SMC footprint - essential for safety-critical power rail protection where derating margin and qualification traceability are mandatory.
Availability
SMCJ120AQ-13-F is available at Aetrix Electronics and suitable for engine control units, telematics gateways, and body control modules requiring stable component supply across extended automotive production lifecycles.
Supply support for SMCJ120AQ-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and computing markets.
This device belongs to the SMCJ AQ-series - a family of AEC-Q101-qualified TVS diodes engineered specifically for harsh automotive electrical environments, targeting ISO7637-2 and ISO10605 compliance in power and data line protection.
FAQ
Is SMCJ120AQ-13-F bidirectional or unidirectional?
SMCJ120AQ-13-F is unidirectional: it clamps only in reverse bias (cathode positive relative to anode) and conducts forward current up to 100A. The absence of "C" in the part number confirms unidirectional configuration; bi-directional variants carry the "C" suffix (e.g., SMCJ120CAQ-13-F).
What is the maximum clamping voltage at rated peak pulse current?
The maximum clamping voltage is 193V at 7.9A peak pulse current (10/1000μs waveform), measured per REA-defined test conditions. This value ensures protected ICs with 200V absolute maximum ratings remain within safe operating limits during ISO7637-2 Pulse 1 and Pulse 3a events.
Does this TVS diode require a heatsink in typical automotive applications?
No external heatsink is required: its 5.0W steady-state power dissipation at TL = +75°C and SMC package thermal resistance (junction-to-lead ≈ 15°C/W) allow adequate self-cooling under normal operating conditions. Heatsinking becomes relevant only under sustained repetitive surge conditions exceeding datasheet derating curves.
How does SMCJ120AQ-13-F differ from industrial-grade SMCJ120A?
SMCJ120AQ-13-F adds AEC-Q101 qualification, PPAP documentation support, IATF 16949 manufacturing, and tighter process controls for automotive use - whereas SMCJ120A lacks automotive certification and may have wider parametric tolerances and no change-control governance for production releases.
SMCJ120AQ-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):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 193V
- Current - Peak Pulse (10/1000µs):
- 7.9A
- 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
SMCJ120AQ-13-F FAQ
1.How can I place an order for SMCJ120AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ120AQ-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 SMCJ120AQ-13-F reliable?
The price and inventory of SMCJ120AQ-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 SMCJ120AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMCJ120AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ120AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ120AQ-13-F?
SMCJ120AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ120AQ-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 SMCJ120AQ-13-F?
For technical support, including SMCJ120AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ120AQ-13-F requirements.
6.How does Aetrix verify that SMCJ120AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMCJ120AQ-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 SMCJ120AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMCJ120AQ-13-F?
All SMCJ120AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ120AQ-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 SMCJ120AQ-13-F part is unused and in its original packaging.
Return procedure for SMCJ120AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ120AQ-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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