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Diodes Incorporated SMBJ48AQ-13-F
- Part No.:
- SMBJ48AQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48AQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:2,121
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Product details
Overview
SMBJ48AQ-13-F from Diodes Incorporated is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode designed for automotive power line protection. It features a 48V reverse standoff voltage (VRWM), 53.3V minimum breakdown voltage (VBR), 77.4V maximum clamping voltage (VC) at 7.7A peak pulse current (IPP), and AEC-Q101 qualification for under-hood engine control unit (ECU) supply rail surge suppression.
For engineers reviewing the SMBJ48AQ-13-F datasheet, SMBJ48AQ-13-F pinout, SMBJ48AQ-13-F application, or SMBJ48AQ-13-F equivalent, this device is selected for ISO7637-2 Pulse 1 (–150V), Pulse 2a (+112V), and Pulse 3b (+150V) compliance in 12V/24V automotive systems requiring robust ESD immunity per ISO10605 (±30kV air/contact discharge).
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode-anode polarity, activated only during negative transients relative to its anode connection. Its 77.4V clamping voltage ensures downstream 48V-rated components remain within safe operating limits during 10×1000μs surge events.
The device leverages silicon avalanche junction technology to achieve sub-nanosecond response time and withstand 100A non-repetitive forward surge current (IFSM) at 8.3ms half-sine waveform. Thermal derating follows a linear 4.8W/°C slope above +25°C ambient, supporting operation up to +175°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - Sustains single 10×1000μs surges without failure in automotive load-dump scenarios |
| Reverse Standoff Voltage | 48V - Blocks normal 12V/24V system operation while enabling clamping above this threshold |
| Clamping Voltage | 77.4V @ 7.7A - Limits transient voltage seen by protected ICs to ≤77.4V during defined surge conditions |
| Breakdown Voltage | 53.3V min @ 1mA - Ensures reliable avalanche conduction onset before damaging overvoltage occurs |
| Leakage Current | 0.5μA max @ 48V - Minimizes standby power loss in always-on vehicle modules |
| AEC-Q101 Qualified | Validated for automotive use - Meets stress test requirements for temperature cycling, HTRB, and mechanical shock |
Pinout & Package
Package: SMB (DO-214AA), surface-mount plastic package with matte tin-plated terminals, UL 94V-0 rated, moisture sensitivity level 1, weight ≈0.1g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance reference; completes clamping loop during negative transients |
| Cathode | Protected line input | Connected to supply rail (e.g., battery feed); conducts avalanche current when VRWM exceeded |
Key Features
| Feature | Design Value |
|---|---|
| 600W peak pulse power | Enables protection against severe ISO7637-2 Pulse 1 (–150V) and Pulse 3a (–220V) waveforms in 24V commercial vehicle systems |
| 77.4V clamping at 7.7A | Guarantees protected 48V logic supplies and CAN transceivers remain below absolute maximum ratings during surge events |
| AEC-Q101 qualification | Confirms reliability across –55°C to +175°C operating range and validates manufacturing in IATF 16949 certified facilities |
| Lead-free, halogen-free | Meets RoHS 3 (2015/863/EU) and automotive green standards (<900ppm Br, <900ppm Cl, <1000ppm Sb) |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Protects 48V auxiliary supply rail in gasoline/diesel ECUs exposed to alternator load dump and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between battery feed and DC-DC converter input. Use Value: Clamps transients to 77.4V, preventing damage to 80V-rated buck controllers and ensuring ASIL-B functional safety compliance. |
Use Scenario: Shields LIN bus power input and microcontroller VDD pins in BCMs subjected to ISO10605 ESD events. IC Role / Device Role / Timing Role: Primary front-end surge clamp on 12V system rail feeding multiple low-voltage regulators. Use Value: Sub-1ns response and 0.5μA leakage preserve signal integrity and minimize quiescent current in always-on modules. |
| Advanced Driver Assistance Systems (ADAS) | Electric Power Steering (EPS) |
|
Use Scenario: Safeguards camera module power inputs in ADAS domain controllers facing repeated ISO7637-2 Pulse 3b (+150V) spikes. IC Role / Device Role / Timing Role: Secondary protection stage after fuse and common-mode choke on 12V camera supply line. Use Value: 600W rating handles cumulative energy from multiple pulses without degradation, supporting ASIL-C system longevity. |
Use Scenario: Guards motor driver gate supply rails in EPS systems where MOSFET switching induces high dv/dt coupling. IC Role / Device Role / Timing Role: Localized TVS at gate driver IC input to suppress coupled transients from H-bridge commutation. Use Value: 53.3V–58.9V breakdown range ensures precise triggering before gate oxide rupture in 60V-rated drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48A-13-F | Non-AEC-Q101 version; identical electrical specs but not qualified for automotive use | Limited to industrial or consumer applications lacking automotive qualification requirements | Select only if AEC-Q101 is not mandated and cost optimization is critical |
| SMCJ48A-Q | Higher 1500W peak power; larger SMC (DO-214AB) package; same 48V VRWM and 77.4V VC | Used where higher surge margin is required (e.g., heavy-duty truck battery feeds) | Choose when system-level testing reveals 600W insufficient for worst-case load dump profiles |
Compared with SMBJ48A-13-F, this part adds AEC-Q101 validation and PPAP capability for automotive production; compared with SMCJ48A-Q, it trades surge capacity for SMB footprint compatibility in space-constrained ECU PCB layouts.
Availability
SMBJ48AQ-13-F is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera power supplies, and electric power steering systems requiring stable component supply across automotive production lifecycles.
Supply support for SMBJ48AQ-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 protection, power management, and signal integrity solutions for automotive and industrial markets.
This device belongs to the SMBJ(AQ) automotive TVS diode family, engineered specifically to meet ISO7637-2 and ISO10605 compliance requirements in harsh-temperature vehicle environments.
FAQ
What is the polarity configuration of SMBJ48AQ-13-F?
SMBJ48AQ-13-F is a unidirectional TVS diode with cathode band marking indicating the cathode terminal. It conducts only during reverse-biased transients-i.e., when the cathode is driven more positive than the anode-and blocks normal forward system voltage. This configuration matches standard automotive supply rail protection topology.
Does SMBJ48AQ-13-F meet ISO7637-2 Pulse 1 requirements?
Yes. With a 77.4V clamping voltage at 7.7A and 600W peak power rating, SMBJ48AQ-13-F clamps the –150V ISO7637-2 Pulse 1 waveform to a safe level for downstream 48V-rated components. Its 100A IFSM rating further supports robustness against repetitive low-energy transients in real-world vehicle harnesses.
How does SMBJ48AQ-13-F differ from SMBJ48A-13-F?
SMBJ48AQ-13-F includes full AEC-Q101 qualification, PPAP documentation support, and manufacturing in IATF 16949-certified facilities-requirements essential for Tier 1 automotive suppliers. SMBJ48A-13-F shares identical electrical parameters but lacks automotive-specific reliability validation and change control processes.
What is the thermal derating behavior above +25°C ambient?
SMBJ48AQ-13-F derates linearly at 4.8W/°C above +25°C ambient temperature. At +75°C ambient, its steady-state power dissipation drops to 5.0W (PM(AV)), matching the rated value. This derating curve is validated per JEDEC JESD22-A104 and applies when leads are maintained at specified temperature limits.
SMBJ48AQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 7.7A
- Power - Peak Pulse:
- 600W
- 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:
- SMB
SMBJ48AQ-13-F FAQ
1.How can I place an order for SMBJ48AQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48AQ-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 SMBJ48AQ-13-F reliable?
The price and inventory of SMBJ48AQ-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 SMBJ48AQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ48AQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48AQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48AQ-13-F?
SMBJ48AQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48AQ-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 SMBJ48AQ-13-F?
For technical support, including SMBJ48AQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48AQ-13-F requirements.
6.How does Aetrix verify that SMBJ48AQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ48AQ-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 SMBJ48AQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ48AQ-13-F?
All SMBJ48AQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48AQ-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 SMBJ48AQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ48AQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48AQ-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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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Diodes Incorporated
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