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Diodes Incorporated SMBJ48CAQ-13-F
- Part No.:
- SMBJ48CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48CAQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR PP
- Quantity:
- Payment:
- Shipping:
Inventory:8,077
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Product details
Overview
SMBJ48CAQ-13-F from Diodes Incorporated is a bi-directional automotive-grade transient voltage suppressor (TVS) diode in SMB package, rated for 600W peak pulse power, 48V reverse standoff voltage (VRWM), and 77.4V max clamping voltage (VC) at 7.7A IPP. It protects CAN, LIN, and sensor interfaces in 12V/24V vehicle subsystems against ISO7637-2 Pulse 1/2a/3a/3b surges and ISO10605 ESD events.
For engineers reviewing the SMBJ48CAQ-13-F datasheet, SMBJ48CAQ-13-F pinout, SMBJ48CAQ-13-F application, or SMBJ48CAQ-13-F equivalent, this part delivers AEC-Q101 qualified surge protection with verified clamping performance, RoHS-compliant matte tin terminations, and IATF 16949 manufacturing traceability - critical for automotive body control modules, ADAS camera power rails, and infotainment USB-C ports.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling robust protection of AC-coupled or differential signal lines without polarity dependency. Its 48V VRWM ensures compatibility with 24V nominal automotive systems while maintaining margin above battery transients.
The device uses silicon avalanche junction technology to achieve sub-nanosecond response time and stable clamping under 10×1000μs surge waveforms. Thermal derating follows a linear 4.8W/°C slope above +25°C ambient, with PM(AV) = 5.0W at TL = +75°C and full operation from –55°C to +175°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - sustains single 10×1000μs transients per ISO7637-2 without degradation |
| Reverse Standoff Voltage | 48V - blocks normal 24V system operation while triggering only during overvoltage events |
| Max Clamping Voltage | 77.4V @ 7.7A - limits downstream IC stress below 80V during worst-case Pulse 1 (–150V) |
| Breakdown Voltage | 53.3–58.9V @ 1mA - ensures reliable avalanche initiation with ±5.3V tolerance band |
| Leakage Current | <0.5μA @ 48V - negligible standby power loss in always-on vehicle networks |
| Operating Temperature | –55°C to +175°C - supports under-hood placement near engine ECUs and transmission controllers |
| AEC-Q101 Qualified | Yes - validated for automotive reliability including HTOL, TCT, and ESD stress testing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic UL 94V-0 housing; 0.1g mass; moisture sensitivity level 1; matte tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Bi-directional terminal pair | No polarity marking; symmetrical terminals enable bidirectional surge shunting on either side of differential bus |
| Anode (Cathode) | Bi-directional terminal pair | Identical electrical role to opposite terminal; no functional distinction in C-suffix devices |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q101 qualified, PPAP capable, manufactured in IATF 16949 certified facilities |
| ESD robustness | Withstands ±30kV air/contact discharge per ISO10605 (150pF/330Ω) |
| Surge immunity | Clamps ISO7637-2 Pulse 1 (–150V), Pulse 2a (+112V), Pulse 3a (–220V), Pulse 3b (+150V) |
| Environmental compliance | RoHS 3 compliant, halogen- and antimony-free "Green" construction (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| Body Control Module (BCM) | ADAS Camera Power Rail |
|---|---|
Use Scenario: Protects LIN bus transceivers and door actuator drivers from load dump and alternator ripple in vehicle body electronics. IC Role / Device Role / Timing Role: Bi-directional TVS placed at connector entry point to clamp fast-rising transients before they reach MCU GPIOs or LIN PHYs. Use Value: Prevents latch-up or permanent damage to 5V/3.3V logic circuits during 12V system cold-crank (–14V) and load dump (+35V). | Use Scenario: Shields 12V input of rear-view camera module from ignition-induced spikes and ESD during service disconnect. IC Role / Device Role / Timing Role: Primary overvoltage clamp on camera DC-DC input stage, operating in parallel with bulk capacitor. Use Value: Limits transient voltage to <80V, ensuring survival of automotive-grade buck converter ICs rated for 60V max input. |
| Infotainment USB-C Port | Engine Control Unit (ECU) Sensor Interface |
Use Scenario: Guards USB-C VBUS line in head unit against hot-plug ESD and cable coupling surges in dashboard environment. IC Role / Device Role / Timing Role: Bi-directional TVS placed immediately after USB-C receptacle, before USB PD controller and port protection IC. Use Value: Maintains <10pF capacitance to avoid USB 2.0 signal integrity degradation while passing ±30kV contact discharge. | Use Scenario: Protects analog inputs of oxygen sensor signal conditioner from crank-induced transients on 5V reference rail. IC Role / Device Role / Timing Role: Secondary clamping device downstream of primary fuse and LC filter, targeting residual high-frequency noise. Use Value: Clamps 10×1000μs pulses to ≤77.4V, preserving 12-bit ADC accuracy and preventing op-amp saturation in sensor front-end. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional automotive TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48CA-13-F | Same electrical specs but not AEC-Q101 qualified; RoHS compliant but not PPAP-capable | Limited to non-safety-critical consumer or industrial use; unsuitable for OEM automotive BOMs | Select only if automotive qualification is not required and cost is prioritized over traceability |
| SMCJ48CA-Q | Higher 1500W PPK rating in larger SMC package; identical VRWM/VC but 12.5A IPP | Better suited for high-energy zones like alternator output or starter motor circuits | Choose when system-level surge energy exceeds 600W or board space allows SMC footprint |
Compared with SMBJ48CA-13-F, this part adds AEC-Q101 validation and IATF 16949 traceability without sacrificing clamping performance; versus SMCJ48CA-Q, it trades peak power for compact SMB size - optimal for space-constrained CAN/LIN nodes where 600W suffices.
Availability
SMBJ48CAQ-13-F is available at Aetrix Electronics and suitable for automotive body electronics, ADAS camera power management, and infotainment interface protection requiring stable component supply across production lifecycles.
Supply support for SMBJ48CAQ-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 SMBJ(AQ) series targets automotive electronics with AEC-Q101 qualification, designed specifically to meet ISO7637-2 and ISO10605 requirements for ECU, sensor, and communication bus protection.
FAQ
What does the 'C' suffix in SMBJ48CAQ-13-F indicate?
The 'C' denotes bi-directional configuration: both terminals behave identically under positive and negative transients, eliminating polarity concerns during PCB layout. This differs from uni-directional variants (e.g., SMBJ48AQ-13-F) that require cathode alignment and only protect against reverse-polarity surges.
How does SMBJ48CAQ-13-F perform under repeated surge events?
It is rated for non-repetitive pulses only - maximum 4 pulses per minute at +25°C ambient. Repeated surges require thermal derating per Figure 6; at +100°C ambient, peak power drops to ~360W. For repetitive protection, external current limiting or thermal monitoring is necessary.
Is SMBJ48CAQ-13-F compatible with lead-free reflow profiles?
Yes - its matte tin finish meets J-STD-020 moisture sensitivity Level 1 and withstands standard lead-free reflow (peak 260°C). The SMB package's thermal mass allows full conformance to IPC/JEDEC J-STD-020D.2 profiles without delamination or voiding.
Can SMBJ48CAQ-13-F replace SMBJ48A-13-F in an existing design?
Yes - identical electrical parameters and SMB footprint allow drop-in replacement. The AQ suffix adds AEC-Q101 qualification, PPAP documentation, and IATF 16949 traceability; no layout or schematic changes are needed for automotive-grade upgrade.
SMBJ48CAQ-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:
- -
- Bidirectional Channels:
- 1
- 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
SMBJ48CAQ-13-F FAQ
1.How can I place an order for SMBJ48CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48CAQ-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 SMBJ48CAQ-13-F reliable?
The price and inventory of SMBJ48CAQ-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 SMBJ48CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ48CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48CAQ-13-F?
SMBJ48CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48CAQ-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 SMBJ48CAQ-13-F?
For technical support, including SMBJ48CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48CAQ-13-F requirements.
6.How does Aetrix verify that SMBJ48CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ48CAQ-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 SMBJ48CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ48CAQ-13-F?
All SMBJ48CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48CAQ-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 SMBJ48CAQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ48CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48CAQ-13-F 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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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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