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Taiwan Semiconductor Corporation SMBJ8.0H
- Part No.:
- SMBJ8.0H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0H.pdf
- Description:
- 600W, 9.9V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,959
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Product details
Overview
SMBJ8.0H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection with 600W peak pulse power rating, 8.0V working stand-off voltage, and 15.0V maximum clamping voltage at 42A peak impulse current. It protects automotive lighting control modules and industrial sensor interfaces against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMBJ8.0H datasheet, SMBJ8.0H pinout, SMBJ8.0H application, or SMBJ8.0H equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, leakage current at operating bias, thermal resistance (RθJA = 55°C/W), and AEC-Q101 qualification for automotive environments.
Technical Context
The SMBJ8.0H employs a glass-passivated silicon junction optimized for sub-nanosecond response (<1.0 ps) to fast-rising ESD and electrical fast transients. Its unidirectional configuration provides low forward voltage (3.5 V @ 50 A) and reverse blocking up to 8.0 V with <50 µA leakage at rated VWM.
Thermally, it features RθJC = 10°C/W and RθJA = 55°C/W, enabling reliable operation at TJ up to +150°C. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for PCB-mounted surge suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 8.89 V / 10.9 V @ 1 mA - Ensures consistent breakdown across production lots |
| VC @ IPP | 15.0 V @ 42.0 A - Limits voltage seen by downstream ICs during 10/1000 µs surge |
| PPK | 600 W - Sustains high-energy transients without failure per ISO 7637-2 |
| ID @ VWM | <50 µA - Minimizes standby power loss in battery-powered systems |
| TJ max | +150 °C - Supports under-hood automotive placement with no derating below 125°C |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability; moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to system ground or low-side return in unidirectional clamp configuration |
| Cathode | Reverse-biased blocking terminal | Connected to protected line (e.g., CAN_H, LIN, sensor supply); polarity mark indicates cathode end |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD |
| Glass passivated junction | Enhances long-term reliability and stability of VBR under humidity and thermal stress |
| Clamping voltage ≤15.0 V | Provides ≥2.5 V margin below typical 17 V absolute maximum rating of 12 V rail ICs |
| Response time <1.0 ps | Engages before ESD or EFT pulses reach vulnerable internal circuitry of microcontrollers or transceivers |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU directives for environmentally constrained applications |
Applications
| Automotive Lighting Control | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontroller GPIOs from load-dump and inductive kickback in headlamp modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V supply rail and ground, clamping surges before they propagate to sensitive analog front-ends. Use Value: Prevents latch-up or permanent damage in LED drivers during 100 V/100 ms load dump events per ISO 16750-2. | Use Scenario: Safeguarding 4–20 mA current-loop transmitters and RS-485 nodes in factory automation sensors. IC Role / Device Role / Timing Role: Bidirectional protection (using SMBJ8.0AH variant) across differential pairs or supply rails exposed to EFT bursts. Use Value: Maintains signal integrity during 4 kV EFT immunity testing (IEC 61000-4-4) without disrupting loop calibration. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
Use Scenario: Shielding LIN bus transceivers and power MOSFET gate drivers from battery line transients in door module ECUs. IC Role / Device Role / Timing Role: Standoff-rated TVS on VBAT-to-ground path, activated only during >8.0 V overvoltage events. Use Value: Enables compliance with ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2b (battery disconnect) waveforms. | Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machine control boards. IC Role / Device Role / Timing Role: Unidirectional clamp across motor terminals or H-bridge supply inputs to absorb 600 W inductive energy. Use Value: Eliminates need for snubber RC networks while maintaining EMC performance per CISPR 14-1. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A | Lower VBR range (8.89–9.83 V) and tighter tolerance; same PPK, VC = 13.6 V | Better suited for lower-voltage rails where tighter clamping margin is critical | Select SMBJ8.0A when VDD of protected IC is ≤13.3 V and design requires reduced clamping overshoot |
| SMCJ8.0A | Same VWM/VBR but higher PPK = 1500 W; larger DO-214AB (SMC) package | Used where higher surge energy handling is required and board space allows larger footprint | Choose SMCJ8.0A only if system-level testing shows 600 W insufficient for worst-case ISO 7637-2 Pulse 5a events |
Compared with SMBJ8.0A and SMCJ8.0A, the SMBJ8.0H offers balanced clamping performance and AEC-Q101 qualification in the compact SMB footprint-ideal for space-constrained automotive modules requiring proven reliability without over-spec'ing surge rating.
Availability
SMBJ8.0H is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor interface, and body control module designs requiring stable component supply with full traceability and lifecycle management.
Supply support for SMBJ8.0H 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, and rectifiers with global distribution and AEC-Q101 validation capability.
The SMBJH series was developed specifically for automotive-grade transient suppression, emphasizing robustness under temperature cycling, low leakage, and precise clamping in DO-214AA packaging for automated SMT assembly.
FAQ
What is the maximum clamping voltage of SMBJ8.0H at its rated peak pulse current?
The SMBJ8.0H has a maximum clamping voltage (VC) of 15.0 V when subjected to its rated peak impulse current (IPP) of 42.0 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits remain within safe operating limits during surge events. The SMBJ8.0H maintains this clamping performance across its full operating temperature range.
Is SMBJ8.0H suitable for bidirectional transient protection?
No, SMBJ8.0H is a unidirectional TVS diode intended for DC line protection with defined anode-cathode polarity. For bidirectional applications such as AC lines or differential buses, the SMBJ8.0AH variant must be used-it provides symmetrical clamping in both directions and is marked with "AH" suffix. Using SMBJ8.0H in bidirectional configurations risks forward conduction and failure.
Does SMBJ8.0H meet automotive qualification standards?
Yes, SMBJ8.0H is AEC-Q101 qualified and tested for automotive use, including temperature cycling, highly accelerated life testing (HALT), and ESD robustness. It also complies with ISO 7637-2 for vehicle electrical disturbances (Pulse 1, 2a, 2b, 3a, 3b) and meets JESD201 Class 2 whisker resistance requirements-making it suitable for under-hood and body electronics.
What is the thermal resistance from junction to ambient for SMBJ8.0H?
The SMBJ8.0H has a junction-to-ambient thermal resistance (RθJA) of 55°C/W under standard JEDEC conditions (single-layer FR-4, 1 in² copper pad). This value assumes proper PCB layout with adequate copper area for heat dissipation. For high-reliability automotive applications, derating curves in Figure 2 of the datasheet must be applied above 25°C ambient temperature.
How does SMBJ8.0H differ from SMBJ8.0A in practical design terms?
The SMBJ8.0H has a broader breakdown voltage range (8.89–10.9 V) versus SMBJ8.0A (8.89–9.83 V), resulting in higher maximum clamping voltage (15.0 V vs. 13.6 V). In practice, SMBJ8.0A offers tighter VBR control and lower clamping-preferred for low-margin 12 V systems-while SMBJ8.0H provides greater process tolerance and cost efficiency for general-purpose automotive protection where 15.0 V clamping is acceptable.
SMBJ8.0H 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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 15V
- Current - Peak Pulse (10/1000µs):
- 42A
- 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)
SMBJ8.0H FAQ
1.How can I place an order for SMBJ8.0H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0H 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 SMBJ8.0H reliable?
The price and inventory of SMBJ8.0H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.0H is usually 5 days.
3.What payment methods are accepted for SMBJ8.0H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0H?
SMBJ8.0H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0H 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 SMBJ8.0H?
For technical support, including SMBJ8.0H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0H requirements.
6.How does Aetrix verify that SMBJ8.0H is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0H 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 SMBJ8.0H meets industry standards.
7.What is the process for return or replacement of SMBJ8.0H?
All SMBJ8.0H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0H, 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 SMBJ8.0H part is unused and in its original packaging.
Return procedure for SMBJ8.0H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0H Tags
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