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Taiwan Semiconductor Corporation SMBJ5.0
- Part No.:
- SMBJ5.0
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ5.0.pdf
- Description:
- 600W, 6.9V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,972
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Product details
Overview
SMBJ5.0 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 5.0 V working stand-off voltage (VWM), 6.4–7.3 V breakdown voltage (VBR), 600 W peak pulse power rating, and clamps transients to ≤9.6 V at 800 A (10/1000 µs waveform). It is used in automotive power supply inputs and industrial sensor interfaces to prevent ESD and load-dump damage.
For engineers reviewing the SMBJ5.0 datasheet, SMBJ5.0 pinout, SMBJ5.0 application, or SMBJ5.0 equivalent, key selection criteria include clamping voltage under 800 A surge, leakage current ≤5 µA at 5.0 V, unidirectional polarity with cathode band marking, and DO-214AA (SMB) package compatibility with automated SMT assembly.
Technical Context
The SMBJ5.0 operates as a silicon avalanche diode with glass-passivated junction, enabling fast response (<1.0 ps) to ESD and electrical fast transients. Its unidirectional configuration provides forward conduction only during reverse overvoltage events, with VF = 3.5 V at 50 A for surge current handling.
It meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements and is rated for junction temperatures from –55 °C to +150 °C. Thermal resistance is 10 °C/W (junction-to-case) and 55 °C/W (junction-to-ambient), supporting reliable operation in high-density PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - Maximum continuous DC or RMS voltage the device blocks without clamping |
| VBR min/max | 6.4 V / 7.3 V @ 10 mA - Confirmed avalanche onset range; ensures reliable triggering above normal operating voltage |
| VC @ IPP | 9.6 V @ 800 A (10/1000 µs) - Clamping voltage limits downstream IC stress during worst-case surge |
| ID @ VWM | ≤5.0 µA - Low leakage preserves battery life and avoids false triggers in low-power circuits |
| PPK | 600 W - Peak impulse power handling capability per single non-repetitive transient event |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 0.090 g mass and J-STD-002 solderability |
| Polarity | Cathode band marked - Unambiguous orientation for correct placement on PCB |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, UL 94V-0 rated compound, and polarity indicated by cathode band. Designed for reflow soldering and compatible with JEDEC-standard pick-and-place equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Cathode-band-opposite terminal | Connected to protected circuit's ground or low-side return path during clamping |
| Cathode | Reverse-biased voltage sensing node | Connected to line being protected; avalanche conduction begins when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| Clamping voltage ≤9.6 V at 800 A | Protects 5 V logic rails and USB PHYs without exceeding absolute maximum ratings of downstream ICs |
| Response time <1.0 ps | Suppresses ESD events (IEC 61000-4-2 ±8 kV contact) before sensitive gate oxides break down |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow, reducing manufacturing cost and process complexity |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and global environmental directives for automotive and industrial end equipment |
Applications
| Automotive Power Input Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to ISO 7637-2 load dump pulses up to 100 V. IC Role / Device Role / Timing Role: Primary TVS clamp placed upstream of LDO regulators and microcontrollers. Use Value: Limits transient voltage to ≤9.6 V, preventing latch-up or permanent damage to 5 V tolerant I/O pins. | Use Scenario: 4–20 mA current loop transmitters interfacing with PLC analog inputs. IC Role / Device Role / Timing Role: Bidirectional overvoltage guard on signal lines subject to field wiring faults and EFT bursts. Use Value: Withstands repetitive 1 kV EFT (IEC 61000-4-4) while maintaining ≤5 µA leakage at 5 V nominal line voltage. |
| USB 2.0 Data Line Protection | LED Driver Power Rail Protection |
Use Scenario: D+/D− lines in embedded host controllers connected to external peripherals. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 1000 pF at 0 V) placed adjacent to USB PHY IC. Use Value: Clamps ±15 kV ESD (IEC 61000-4-2) without distorting 480 Mbps data eye integrity. | Use Scenario: Constant-current LED drivers powered from 5 V SMPS supplies in signage systems. IC Role / Device Role / Timing Role: Input rail protector against inductive kickback from nearby relay coils. Use Value: Absorbs 600 W surge energy without degradation, preserving driver MOSFET gate oxide integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0A | Narrower VBR range (6.4–7.0 V); lower clamping voltage (9.2 V @ 800 A) | Better suited for tighter-tolerance 5 V rails where margin below 9.2 V is required | Select SMBJ5.0A when clamping voltage headroom is constrained and VBR consistency is prioritized |
| P6SMB5.0 | Same DO-214AA package; identical VWM/VBR/VC specs but higher IR (≤10 µA @ 5 V) | Acceptable where slightly higher leakage is tolerable and second-source qualification is needed | Choose P6SMB5.0 for dual-sourcing in industrial BOMs without layout change |
Compared with SMBJ5.0, the SMBJ5.0A offers tighter VBR control and lower VC for enhanced 5 V rail protection, while P6SMB5.0 provides a widely qualified alternative with identical form factor but relaxed leakage spec-both require no PCB redesign.
Availability
SMBJ5.0 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor nodes, USB peripheral interfaces, and LED lighting power supplies requiring stable component supply across multi-year production cycles.
Supply support for SMBJ5.0 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving automotive, industrial, and consumer markets since 1979.
The SMBJ series was developed specifically for robust, high-power transient suppression in harsh environments-emphasizing low clamping voltage, AEC-Q101 readiness, and automated assembly compatibility.
FAQ
What is the maximum clamping voltage of SMBJ5.0 under standard 10/1000 µs surge conditions?
The SMBJ5.0 has a maximum clamping voltage (VC) of 9.6 V when subjected to an 800 A peak impulse current with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the manufacturer's electrical specifications table for SMBJ5.0. It defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Is SMBJ5.0 suitable for bidirectional transient protection?
No, SMBJ5.0 is a unidirectional TVS diode intended for DC line protection with defined polarity (cathode band marking). For bidirectional applications such as AC signal lines or differential buses, SMBJ5.0C or SMBJ5.0CA variants must be used-these have symmetrical breakdown characteristics in both directions and are explicitly designated in the ordering code.
What is the leakage current specification for SMBJ5.0 at its working stand-off voltage?
The SMBJ5.0 exhibits a maximum blocking leakage current (ID) of 5.0 µA when biased at its 5.0 V working stand-off voltage (VWM), tested at TA = 25°C. This low leakage supports energy-sensitive applications like battery-powered sensors and ensures minimal impact on system quiescent current budgets.
Does SMBJ5.0 meet automotive transient immunity standards?
Yes, SMBJ5.0 meets ISO 7637-2 test requirements for Pulse 1, 2a, 2b, 3a, and 3b waveforms-covering common automotive electrical disturbances including load dump, alternator ripple, and inductive switching spikes. Its 600 W peak power rating and 9.6 V clamping performance align directly with these standardized immunity thresholds.
What package type and mounting method does SMBJ5.0 use?
SMBJ5.0 uses the DO-214AA (SMB) surface-mount package with matte tin-plated leads compliant with J-STD-002 solderability requirements. It is designed for reflow soldering in automated SMT lines and features a cathode band for unambiguous orientation-no through-hole or socket mounting is supported.
SMBJ5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.6V
- Current - Peak Pulse (10/1000µs):
- 65A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ5.0 FAQ
1.How can I place an order for SMBJ5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ5.0 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 SMBJ5.0 reliable?
The price and inventory of SMBJ5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ5.0 is usually 5 days.
3.What payment methods are accepted for SMBJ5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ5.0?
SMBJ5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ5.0 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 SMBJ5.0?
For technical support, including SMBJ5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ5.0 requirements.
6.How does Aetrix verify that SMBJ5.0 is sourced from the original manufacturer or authorized distributors?
All SMBJ5.0 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 SMBJ5.0 meets industry standards.
7.What is the process for return or replacement of SMBJ5.0?
All SMBJ5.0 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ5.0, 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 SMBJ5.0 part is unused and in its original packaging.
Return procedure for SMBJ5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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