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Taiwan Semiconductor Corporation SMBJ5.0H
- Part No.:
- SMBJ5.0H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ5.0H.pdf
- Description:
- 600W, 6.9V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,068
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Product details
Overview
SMBJ5.0H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, rated for 600W peak pulse power, 5.0V working stand-off voltage (VWM), and 9.6V maximum clamping voltage (VC) at 800A peak impulse current. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMBJ5.0H datasheet, SMBJ5.0H pinout, SMBJ5.0H application, or SMBJ5.0H equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance values, clamping performance under 10/1000µs waveform, and bidirectional variant compatibility guidance.
Technical Context
The SMBJ5.0H employs a glass-passivated silicon junction optimized for fast transient response (<1.0ps) and low leakage (<5.0µA at VWM). Its unidirectional configuration provides forward conduction path with VF = 3.5V at 50A, enabling robust surge handling in DC power lines.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing requirements and supports moisture sensitivity level 1 per J-STD-020. Thermal performance is characterized by RθJC = 10°C/W and RθJA = 55°C/W, supporting operation from –55°C to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 6.40 / 7.30 V @ 10 mA - Breakdown voltage range defining turn-on threshold tolerance |
| VC @ IPP | 9.6 V @ 800 A - Clamped voltage during 10/1000µs surge, limiting downstream IC stress |
| PPK | 600 W - Peak pulse power rating for non-repetitive transients per IEC 61000-4-5 |
| ID @ VWM | <5.0 µA - Low leakage ensures minimal standby power loss in battery-critical systems |
| TJ max | +150 °C - Enables use in under-hood automotive environments without derating |
| RθJC | 10 °C/W - Confirms efficient heat transfer from junction to case for PCB copper pour design |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-die unidirectional TVS diode with cathode band marking. Matte tin-plated leads meet J-STD-002 solderability; weight ≈ 0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path in unidirectional protection |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 5V rail); conducts when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test conditions including HTOL, TC, UHAST, and ESD |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
| Clamping voltage ≤9.6V @ 800A | Protects 5V logic interfaces (e.g., CAN transceivers, microcontroller I/O) from destructive overvoltage |
| Fast response time <1.0ps | Responds before EFT bursts (IEC 61000-4-4) or lightning-induced surges propagate into sensitive circuitry |
| ISO 7637-2 compliance | Validated against automotive load dump and inductive switching transients (Pulse 1, 2a, 2b, 3a, 3b) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 5V supply line feeding engine control unit (ECU) sensors exposed to alternator load dump and relay switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 5V rail and chassis ground to clamp transients before reaching sensor analog front-end. Use Value: Limits voltage excursion to ≤9.6V during 800A surge, preserving ADC reference integrity and preventing latch-up in 5V microcontrollers. | Use Scenario: RS-485 transceiver bus lines in factory automation PLCs subjected to ESD events and motor drive coupling. IC Role / Device Role / Timing Role: SMBJ5.0H used on VCC pin of isolated RS-485 IC to suppress common-mode surges entering via power domain. Use Value: Sub-10V clamping prevents internal LDO dropout and maintains bias stability for differential receiver operation during fast transients. |
| LED Driver Input Protection | USB-C Power Delivery Line Guard |
Use Scenario: Constant-current LED driver input stage powered from 5V USB source in automotive interior lighting modules. IC Role / Device Role / Timing Role: TVS placed across input capacitor to absorb hot-plug transients and cable discharge events. Use Value: With 5.0V VWM and 9.6V VC, it avoids false triggering during normal 5V operation while clamping >10V spikes within safe margin for driver IC inputs. | Use Scenario: VBUS line protection in USB-C PD sink applications where 5V negotiation phase precedes higher-voltage contracts. IC Role / Device Role / Timing Role: SMBJ5.0H guards the 5V-only PD contract stage, placed upstream of buck converter input. Use Value: Ensures <5µA leakage at 5V does not interfere with CC logic detection, while clamping ESD strikes per IEC 61000-4-2 Level 4 (±15kV air). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0AH | Narrower VBR range (6.40–7.00 V vs. 6.40–7.30 V); same VWM, VC = 9.2 V | Lower clamping voltage improves margin for 5V logic but tighter VBR may increase risk of nuisance conduction near VWM | Select SMBJ5.0AH when absolute minimum clamping is critical and system tolerates tighter breakdown distribution. |
| SMCJ5.0A | Higher PPK (1500W), larger DO-214AB (SMC) package, VC = 9.2 V, VBR = 6.40–7.00 V | Supports higher energy surges but requires larger PCB footprint and has higher parasitic inductance | Choose SMCJ5.0A only when 600W is insufficient and layout allows DO-214AB footprint. |
Compared with SMBJ5.0AH, the SMBJ5.0H offers wider VBR tolerance for robustness in high-temperature production environments; versus SMCJ5.0A, it delivers space-constrained 600W protection without sacrificing clamping performance or requiring rework of existing SMB footprints.
Availability
SMBJ5.0H is available at Aetrix Electronics and suitable for automotive infotainment power rails, industrial sensor nodes, LED lighting drivers, and USB-C PD 5V negotiation stages requiring stable component supply and AEC-Q101 compliance.
Supply support for SMBJ5.0H 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The SMBJH series was developed specifically for AEC-Q101-compliant transient suppression in compact surface-mount automotive ECUs and industrial controllers where DO-214AA footprint and 600W capability are essential.
FAQ
What is the maximum clamping voltage of SMBJ5.0H under standard 10/1000µs surge conditions?
The SMBJ5.0H 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 at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ5.0H maintains this clamping performance across its specified junction temperature range, making it suitable for 5V rail protection in thermally demanding environments.
Is SMBJ5.0H suitable for bidirectional transient suppression?
No, SMBJ5.0H is a unidirectional TVS diode and is not rated for bidirectional operation. For bipolar applications, Taiwan Semiconductor specifies variants with "CH" or "CAH" suffixes (e.g., SMBJ5.0CH). Using SMBJ5.0H in reverse-biased configurations beyond its specified reverse standoff voltage risks permanent junction damage. Always verify polarity alignment during PCB layout-cathode must connect to the protected line.
Does SMBJ5.0H meet automotive qualification standards?
Yes, SMBJ5.0H is AEC-Q101 qualified, having passed stress tests including high-temperature operating life (HTOL), temperature cycling (TC), unbiased highly accelerated stress test (UHAST), and human-body-model ESD. Its DO-214AA package also meets J-STD-020 moisture sensitivity level 1, supporting lead-free reflow without popcorn cracking. These qualifications confirm suitability for under-hood and cabin automotive modules.
What is the forward voltage drop of SMBJ5.0H at rated surge current?
The SMBJ5.0H exhibits a forward voltage (VF) of 3.5 V at 50 A, per the datasheet's Note 2. This applies specifically to the SMBJ5.0H through SMBJ90H device group. The VF value characterizes conduction behavior during high-current unidirectional surges and informs thermal design-combined with its RθJC = 10°C/W, it enables accurate junction temperature estimation during repetitive transient events.
How does SMBJ5.0H compare to SMAJ5.0A in terms of power rating and package?
SMBJ5.0H delivers 600 W peak pulse power in the DO-214AA (SMB) package, whereas SMAJ5.0A is rated for 400 W in the smaller DO-214AC (SMA) package. The SMB outline provides superior thermal dissipation (RθJA = 55°C/W vs. ~65°C/W for SMA) and higher surge current handling (800 A vs. 500 A). SMBJ5.0H is preferred where board space permits and higher energy transients are expected.
SMBJ5.0H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJH
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ5.0H FAQ
1.How can I place an order for SMBJ5.0H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ5.0H 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 SMBJ5.0H reliable?
The price and inventory of SMBJ5.0H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ5.0H is usually 5 days.
3.What payment methods are accepted for SMBJ5.0H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ5.0H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ5.0H?
SMBJ5.0H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ5.0H 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 SMBJ5.0H?
For technical support, including SMBJ5.0H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ5.0H requirements.
6.How does Aetrix verify that SMBJ5.0H is sourced from the original manufacturer or authorized distributors?
All SMBJ5.0H 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 SMBJ5.0H meets industry standards.
7.What is the process for return or replacement of SMBJ5.0H?
All SMBJ5.0H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ5.0H, 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 SMBJ5.0H part is unused and in its original packaging.
Return procedure for SMBJ5.0H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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