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Taiwan Semiconductor Corporation SMBJ8.0CH
- Part No.:
- SMBJ8.0CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0CH.pdf
- Description:
- 600W, 9.9V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,293
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Product details
Overview
SMBJ8.0CH from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 8.0V working stand-off voltage, 8.89–10.9V breakdown voltage at 1mA test current, and 15.0V maximum clamping voltage at 42A peak pulse current-designed for automotive ESD and load-dump protection in power supply rails.
For engineers reviewing the SMBJ8.0CH datasheet, SMBJ8.0CH pinout, SMBJ8.0CH application, or SMBJ8.0CH equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, AEC-Q101 qualification status, unidirectional polarity marking, and thermal resistance (RθJA = 55°C/W) for board-level thermal design.
Technical Context
The SMBJ8.0CH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (8.89–10.9V), clamping transients to ≤15.0V at 42A (10/1000µs waveform). It features glass-passivated junction and meets JESD201 Class 2 whisker resistance.
Its thermal design relies on RθJC = 10°C/W and RθJA = 55°C/W, enabling reliable operation up to TJ = +150°C. Polarity is marked by cathode band; moisture sensitivity level is J-STD-020 Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before leakage rises significantly |
| VBR @ IT=1mA | 8.89–10.9 V - Breakdown threshold range defining turn-on consistency across production units |
| VC @ IPP=42A | 15.0 V - Clamped voltage during 10/1000µs surge, limiting downstream IC stress |
| IPP (10/1000µs) | 42 A - Peak surge current capability at rated clamping voltage |
| PPK | 600 W - Non-repetitive peak pulse power handling per single transient event |
| ID @ VWM | <50 µA - Low leakage ensures minimal standby power loss in high-impedance circuits |
| TJ max | +150°C - Junction temperature limit supporting under-hood automotive deployment |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-diode configuration with cathode band marking polarity. Matte tin-plated leads, UL 94V-0 molding compound, 0.090g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path in unidirectional TVS placement |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12V rail); cathode band identifies this terminal physically |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Clamping response time | <1.0 ps - Enables suppression of fast EFT bursts before sensitive logic is disrupted |
| ISO 7637-2 compliance | Rated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect/load dump), and Pulse 3a/3b (EFT) |
| Moisture sensitivity | Level 1 per J-STD-020 - No bake required prior to reflow, simplifying SMT assembly |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 2b) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp surges before they reach LDOs and microcontrollers. Use Value: Limits transient voltage to ≤15.0V at 42A, preventing latch-up or gate oxide damage in downstream 16V-rated ICs. | Use Scenario: 24V industrial PLC analog input modules subject to EFT (IEC 61000-4-4) and cable discharge events. IC Role / Device Role / Timing Role: Front-end protection for precision ADC drivers and op-amps on signal conditioning boards. Use Value: Sub-1ps response ensures clamping occurs within first nanosecond of EFT edge, preserving signal integrity. |
| LED Lighting Driver Protection | Automotive CAN Transceiver Protection |
Use Scenario: Constant-current LED drivers in vehicle exterior lighting subjected to inductive switching transients. IC Role / Device Role / Timing Role: TVS placed across driver output to absorb flyback energy from solenoid or relay coils. Use Value: 600W peak power rating sustains multiple 10/1000µs pulses without degradation, extending driver lifetime. | Use Scenario: CAN FD physical layer transceivers (e.g., TCAN1042) in body control modules. IC Role / Device Role / Timing Role: Secondary protection stage after common-mode choke, shunting differential transients to ground. Use Value: Low 50µA leakage at 8.0V avoids biasing errors in high-impedance CAN bus termination networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0AHE3/52 (Vishay) | VBR min/max = 8.89–9.83V; VC = 13.6V @ 46A; same DO-214AA package | Lower clamping voltage but reduced IPP margin vs. SMBJ8.0CH's 42A/15.0V spec | Prefer when lower clamping is critical and surge current demand is ≤46A |
| P6SMB8.0A (ON Semiconductor) | VBR = 8.9–9.8V; VC = 13.6V @ 46A; AEC-Q101 qualified; same footprint | Identical electrical envelope but different marking and tape/reel packaging (3k vs. 3k) | Drop-in alternative where second-source validation is required and Vishay/Vishay-legacy supply chain is preferred |
Compared with SMBJ8.0CH, SMBJ8.0AHE3/52 offers tighter VBR tolerance and lower clamping but trades off peak current headroom, while P6SMB8.0A matches key specs and qualification-making it suitable for dual-sourcing without layout change.
Availability
SMBJ8.0CH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, LED driver circuits, and CAN bus protection requiring stable component supply across extended temperature and surge environments.
Supply support for SMBJ8.0CH 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive and industrial markets.
The SMBJH series was designed specifically for AEC-Q101-compliant transient suppression in 12V/24V automotive subsystems-including body electronics, lighting, and infotainment-balancing clamping performance, thermal robustness, and SMT manufacturability.
FAQ
What is the polarity configuration of SMBJ8.0CH?
The SMBJ8.0CH is a unidirectional TVS diode, with cathode identified by a visible band on the DO-214AA package. It conducts only during reverse overvoltage events-forward voltage drop is 3.5V at 50A, per SMBJ5.0H–SMBJ90H family specification. This polarity enables precise placement on positive-rail protection paths without forward conduction during normal operation.
Does SMBJ8.0CH meet automotive qualification standards?
Yes, SMBJ8.0CH is AEC-Q101 qualified and tested per automotive reliability requirements including temperature cycling, high-temperature reverse bias (HTRB), and ESD (HBM ≥8kV). It also meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b for transient immunity-making it suitable for under-hood and cabin ECU applications where robustness against load dump and EFT is mandatory.
What is the maximum clamping voltage of SMBJ8.0CH under surge conditions?
The SMBJ8.0CH has a maximum clamping voltage (VC) of 15.0V at 42A peak pulse current (10/1000µs waveform). This value is guaranteed across temperature and process variation, ensuring protected ICs see no more than 15.0V during worst-case transients-critical for safeguarding 16V-rated regulators and microcontrollers in automotive power domains.
How does SMBJ8.0CH compare to bidirectional variants like SMBJ8.0CH?
SMBJ8.0CH is unidirectional; the "CH" suffix denotes cathode-band-marked unidirectional construction. Bidirectional equivalents (e.g., SMBJ8.0CAH) have symmetrical VBR in both directions and no polarity marking. SMBJ8.0CH must not be substituted for bidirectional use-its forward conduction path is intentional for DC rail protection, whereas bidirectional types suit AC-coupled or floating signal lines.
What is the thermal resistance profile of SMBJ8.0CH?
SMBJ8.0CH has a junction-to-case thermal resistance (RθJC) of 10°C/W and junction-to-ambient (RθJA) of 55°C/W under standard JEDEC PCB conditions. These values enable thermal design for continuous power dissipation up to 3W at 25°C ambient, and derated operation up to +150°C junction temperature-essential for engine bay deployments where airflow is limited.
SMBJ8.0CH 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBJ8.0CH FAQ
1.How can I place an order for SMBJ8.0CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0CH 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 SMBJ8.0CH reliable?
The price and inventory of SMBJ8.0CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.0CH is usually 5 days.
3.What payment methods are accepted for SMBJ8.0CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0CH?
SMBJ8.0CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0CH 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 SMBJ8.0CH?
For technical support, including SMBJ8.0CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0CH requirements.
6.How does Aetrix verify that SMBJ8.0CH is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0CH 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 SMBJ8.0CH meets industry standards.
7.What is the process for return or replacement of SMBJ8.0CH?
All SMBJ8.0CH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0CH, 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 SMBJ8.0CH part is unused and in its original packaging.
Return procedure for SMBJ8.0CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0CH Tags
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