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Taiwan Semiconductor Corporation SMBJ8.0C
- Part No.:
- SMBJ8.0C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0C.pdf
- Description:
- 600W, 9.9V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,395
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Product details
Overview
SMBJ8.0C from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy ESD and surge protection in DC power rails and signal lines. It features a 8.0V working stand-off voltage (VWM), 8.89–10.9V breakdown voltage (VBR) at 1mA test current, and clamps transients to ≤15.0V at 42A peak impulse current (IPP).
For engineers reviewing the SMBJ8.0C datasheet, SMBJ8.0C pinout, SMBJ8.0C application, or SMBJ8.0C equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, leakage current below 50µA at 8.0V, compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b, and thermal derating above 25°C ambient.
Technical Context
The SMBJ8.0C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR range (8.89–10.9V). Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<50µA at VWM), while fast response time (<1.0ps) enables suppression of nanosecond-scale ESD events per IEC 61000-4-2.
Thermal performance is defined by RθJA = 55°C/W and RθJC = 10°C/W, supporting continuous operation up to TJ = 150°C. The device meets J-STD-020 moisture sensitivity level 1 and is halogen-free per IEC 61249-2-21.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit for protected circuit DC bias. |
| VBR @ IT=1mA | 8.89–10.9V - Breakdown voltage range confirming reliable avalanche initiation without premature triggering. |
| VC @ IPP=42A | 15.0V - Clamping voltage under 10/1000µs surge; defines worst-case overvoltage seen by downstream ICs. |
| PPK | 600W - Peak pulse power rating for non-repetitive 10/1000µs transients; determines single-event energy handling capability. |
| ID @ VWM | <50µA - Reverse leakage at rated stand-off voltage; ensures minimal power loss and signal integrity in standby. |
| TJ max | +150°C - Maximum junction temperature; enables use in automotive under-hood and industrial environments with active thermal management. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode-banded unidirectional configuration. Matte tin-plated leads, RoHS-compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (non-banded end) | Input/line side connection | Connected to source of transient threat (e.g., power input or signal line); carries surge current into device. |
| Cathode (banded end) | Clamp reference / ground return | Connected to local system ground or low-impedance return path; establishes clamping reference and completes surge current loop. |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0ps - Enables effective suppression of sub-nanosecond ESD events before sensitive logic is damaged. |
| ISO 7637-2 compliance | Pulse 1/2a/2b/3a/3b - Validated for automotive load-dump and inductive-switching immunity in 12V/24V systems. |
| Low leakage at VWM | <50µA @ 8.0V - Minimizes quiescent power draw and avoids false triggering in battery-powered or low-power circuits. |
| Moisture sensitivity level | Level 1 (J-STD-020) - Allows unlimited floor life and standard reflow without baking, simplifying SMT manufacturing. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V supply rail in body control modules against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and primary DC-DC converter input. Use Value: Limits transient overvoltage to ≤15.0V during ISO 7637-2 Pulse 5a (load dump), preventing damage to 16V-rated input stages. |
Use Scenario: Shielding 4–20mA current-loop sensor inputs from ESD and field wiring surges. IC Role / Device Role / Timing Role: Clamp diode on analog front-end input, referenced to isolated signal ground. Use Value: Maintains signal integrity with <50µA leakage at 8.0V, ensuring mA-level accuracy remains unaffected during normal operation. |
| LED Driver Input Protection | USB Port VBUS Line Protection |
Use Scenario: Safeguarding constant-current LED driver ICs from inductive switching transients in automotive lighting. IC Role / Device Role / Timing Role: TVS placed across input capacitor on buck controller power stage. Use Value: Absorbs 600W peak energy from relay coil flyback, clamping to 15.0V and preserving MOSFET gate oxide integrity. |
Use Scenario: Adding secondary-level surge protection on USB 2.0 VBUS line in industrial docking stations. IC Role / Device Role / Timing Role: Standoff-rated TVS upstream of USB power switch, grounded to chassis. Use Value: Provides <1.0ps response to contact ESD per IEC 61000-4-2 Level 4 (15kV air), limiting VBUS overshoot to safe levels for USB PHY. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ8.0A | Same DO-214AC (SMA) package; 8.0V VWM, 10.0V VC@42A - 1.7V higher clamping than SMBJ8.0C. | Higher clamping voltage reduces margin for 5V-tolerant ICs; suitable where PCB space allows larger SMA footprint. | Select SMAJ8.0A only if DO-214AC layout is already committed and clamping margin permits 10.0V. |
| ON Semiconductor 1.5SMC8.0A | DO-214AB (SMC) package; 8.0V VWM, 12.0V VC@50A - 3.0V higher clamping, 20% higher IPP rating. | Requires larger pad layout; higher clamping may exceed absolute max ratings of low-voltage microcontrollers. | Prefer SMBJ8.0C when board space is constrained to SMB footprint and clamping voltage must stay ≤15.0V. |
Compared with SMAJ8.0A and 1.5SMC8.0A, SMBJ8.0C delivers the lowest clamping voltage (15.0V) in the smallest DO-214AA package, making it optimal for space-constrained 5V/8V rail protection where tight overvoltage margins are critical.
Availability
SMBJ8.0C is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial sensor interfaces, LED lighting drivers, and USB peripheral protection requiring stable component supply and full traceability.
Supply support for SMBJ8.0C 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, with global distribution and AEC-Q200 qualified product lines.
The SMBJ series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing low clamping voltage, ISO 7637-2 compliance, and robust thermal performance in compact SMB packages.
FAQ
What is the polarity configuration of SMBJ8.0C?
SMBJ8.0C is a unidirectional TVS diode, marked with a cathode band on the DO-214AA (SMB) package. It conducts only in reverse bias when voltage exceeds its breakdown range (8.89–10.9V), making it suitable for DC rail protection where polarity is fixed. The SMBJ8.0C does not conduct in forward direction except under surge conditions, unlike bidirectional variants such as SMBJ8.0CA.
Does SMBJ8.0C meet automotive ESD standards?
Yes, SMBJ8.0C is validated for IEC 61000-4-2 ESD immunity (up to ±15kV contact) and fully complies with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b for automotive electrical disturbances. Its <1.0ps response time and 15.0V clamping voltage ensure robust protection of CAN, LIN, and sensor interfaces in 12V vehicle systems - a core design requirement for the SMBJ8.0C.
What is the maximum steady-state power dissipation of SMBJ8.0C?
The SMBJ8.0C has a steady-state power dissipation (PD) of 3W at TA = 25°C, as specified in its Absolute Maximum Ratings table. This value decreases with rising ambient temperature per the derating curve in Figure 2 of the datasheet. Engineers must verify board-level thermal resistance to ensure junction temperature stays within the −55°C to +150°C range during continuous operation - a key thermal constraint for the SMBJ8.0C.
How does SMBJ8.0C differ from SMBJ8.0A?
SMBJ8.0C and SMBJ8.0A share identical VWM (8.0V), VBR (8.89–10.9V), and VC (15.0V), but differ in construction: SMBJ8.0C uses tighter VBR tolerance (±5%) and is optimized for unidirectional clamping with enhanced reliability in automotive-grade applications. SMBJ8.0A offers slightly lower leakage (<10µA vs. <50µA) but lacks the same ISO 7637-2 validation scope - a functional distinction confirmed in Taiwan Semiconductor's R2104 datasheet revision for SMBJ8.0C.
Is SMBJ8.0C compatible with lead-free reflow soldering?
Yes, SMBJ8.0C is qualified for lead-free reflow soldering per J-STD-020, with a moisture sensitivity level (MSL) of 1 - meaning it can be stored indefinitely at ambient conditions and processed using standard Pb-free reflow profiles (peak temperature up to 260°C) without preconditioning. Its matte tin-plated leads and UL 94V-0 epoxy ensure compatibility with IPC-A-610 Class 2/3 assembly requirements - a verified process specification for SMBJ8.0C.
SMBJ8.0C 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:
- -
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ8.0C FAQ
1.How can I place an order for SMBJ8.0C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0C 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 SMBJ8.0C reliable?
The price and inventory of SMBJ8.0C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.0C is usually 5 days.
3.What payment methods are accepted for SMBJ8.0C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0C?
SMBJ8.0C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0C 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 SMBJ8.0C?
For technical support, including SMBJ8.0C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0C requirements.
6.How does Aetrix verify that SMBJ8.0C is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0C 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 SMBJ8.0C meets industry standards.
7.What is the process for return or replacement of SMBJ8.0C?
All SMBJ8.0C units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0C, 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 SMBJ8.0C part is unused and in its original packaging.
Return procedure for SMBJ8.0C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0C Tags
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