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Taiwan Semiconductor Corporation SMBJ8V0A
- Part No.:
- SMBJ8V0A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8V0A.pdf
- Description:
- TVS DIODE 8VWM 13.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,531
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Product details
Overview
SMBJ8V0A from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 8.0 V working stand-off voltage (VWM), 8.89–9.83 V breakdown voltage (VBR), and 13.6 V maximum clamping voltage (VC) at 50 A peak impulse current - designed for ESD and inductive switching surge protection in DC power rails and signal lines.
For engineers reviewing the SMBJ8V0A datasheet, SMBJ8V0A pinout, SMBJ8V0A application, or SMBJ8V0A equivalent, key selection criteria include clamping performance under 10/1000 µs transients, leakage current below 1 µA at 8.0 V, unidirectional polarity marking, thermal resistance (RθJA = 55 °C/W), and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b.
Technical Context
The SMBJ8V0A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR range (8.89–9.83 V @ 1 mA). It clamps transient energy within nanoseconds (response time < 1.0 ps), limiting downstream voltage to ≤13.6 V at 50 A IPP while dissipating up to 600 W non-repetitive peak pulse power.
Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA @ VWM), and its DO-214AA package supports automated placement with matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before conduction begins; sets safe DC rail margin. |
| VBR min/max | 8.89 / 9.83 V @ 1 mA - Confirmed avalanche onset range; ensures reliable triggering above nominal rail. |
| VC @ IPP | 13.6 V @ 50 A - Clamped voltage during 10/1000 µs surge; defines worst-case stress on protected IC inputs. |
| PPK | 600 W - Peak pulse power handling per single transient; validates robustness against automotive load dump or EFT. |
| ID @ VWM | <1 µA - Reverse leakage at rated stand-off; negligible power loss and signal integrity impact in standby. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood or industrial ambient environments. |
| RθJA | 55 °C/W - Junction-to-ambient thermal resistance; informs heatsinking requirements for repetitive surge duty. |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking for unidirectional polarity; 0.090 g weight; UL 94V-0 molding compound; matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-side return path; completes clamping loop during transient events. |
| Cathode | Protected line input | Connected to line being protected (e.g., +12 V rail); conducts avalanche current to ground when overvoltage occurs. |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Enables suppression of sub-nanosecond ESD events before sensitive logic is damaged. |
| Glass passivated junction | Stable VBR tolerance and low leakage across temperature and life cycle - critical for long-term reliability in automotive ECUs. |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT) - meets OEM-level vehicle electrical system immunity requirements. |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement before reflow - simplifies SMT manufacturing and reduces process risk. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply lines in body control modules from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO/regulator input. Use Value: Limits voltage to ≤13.6 V during 600 W surges, preventing regulator latch-up or internal FET failure. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential or single-ended signal traces near connector entry points. Use Value: Sub-1 µA leakage preserves signal accuracy; fast clamping prevents ADC saturation or op-amp damage. |
| LED Driver Overvoltage Clamp | DC Motor Control Surge Suppression |
Use Scenario: Safeguarding constant-current LED driver ICs from flyback spikes during PWM switching. IC Role / Device Role / Timing Role: TVS connected across driver output terminals or bootstrap capacitor. Use Value: Clamps inductive kickback to 13.6 V, avoiding gate oxide rupture or current-sense amplifier overload. | Use Scenario: Absorbing back-EMF from brushed DC motors in HVAC actuators or window lift systems. IC Role / Device Role / Timing Role: Unidirectional TVS across motor terminals or H-bridge high-side switch. Use Value: Handles 50 A peak surge without degradation; RθJA = 55 °C/W supports intermittent duty in enclosed enclosures. |
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 (ON Semiconductor) | Identical VWM (8.0 V), VBR (8.89–9.83 V), VC (13.6 V), and DO-214AA package; same 600 W PPK rating. | No functional difference; validated for identical ISO 7637-2 pulses and JEDEC moisture level 1. | Drop-in replacement with identical marking code (KR) and tape-and-reel packaging (3,000 pcs). |
| P6SMB8.0A (Littelfuse) | VWM = 8.0 V, VBR = 8.89–9.83 V, VC = 13.6 V, same DO-214AA package and 600 W rating; minor variation in RθJA (50 °C/W vs. 55 °C/W). | Same automotive and industrial use cases; slightly better thermal performance allows marginally higher repetitive surge frequency. | Validated alternative with full ISO 7637-2 compliance and identical footprint; preferred where tighter thermal budget exists. |
Compared with SMBJ8V0A, SMBJ8.0A offers identical electrical and mechanical specs with seamless second-source availability, while P6SMB8.0A provides marginally improved thermal resistance - both support drop-in qualification in automotive and industrial designs requiring 8 V stand-off and 600 W surge capability.
Availability
SMBJ8V0A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, LED driver overvoltage clamping, and DC motor control surge suppression requiring stable component supply across production lifecycles.
Supply support for SMBJ8V0A 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 applications.
The SMBJ series was developed specifically for high-reliability transient suppression in harsh environments - emphasizing low clamping voltage, ISO 7637-2 compliance, and robust packaging for automotive-grade ECU and body electronics.
FAQ
What is the maximum clamping voltage of SMBJ8V0A at its rated peak pulse current?
The SMBJ8V0A has a maximum clamping voltage (VC) of 13.6 V when subjected to its rated peak impulse current (IPP) of 50 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry will not experience voltages exceeding this threshold during defined surge events - a critical parameter for ensuring downstream IC survival in automotive and industrial applications.
Is SMBJ8V0A unidirectional or bidirectional, and how is polarity identified?
SMBJ8V0A is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix and confirmed by its single VBR specification (8.89–9.83 V) and forward voltage rating (VF = 3.5 V @ 50 A). Polarity is marked on the DO-214AA package with a cathode band - the banded end connects to the protected line, while the anode connects to ground. This configuration blocks forward current until breakdown, enabling precise DC rail protection.
Does SMBJ8V0A meet automotive transient immunity standards?
Yes, SMBJ8V0A meets ISO 7637-2 requirements for Pulses 1 (inductive load disconnect), 2a/2b (switching transients), and 3a/3b (electrical fast transients), as explicitly stated in Taiwan Semiconductor's official documentation. Its 600 W peak pulse power rating, low clamping voltage, and verified response time < 1.0 ps make it suitable for front-end protection in automotive ECUs, body controllers, and infotainment power supplies where OEM-level surge immunity is mandatory.
What is the leakage current specification for SMBJ8V0A at its working stand-off voltage?
SMBJ8V0A exhibits a maximum blocking leakage current (ID) of less than 1 µA at its working stand-off voltage (VWM) of 8.0 V, measured at TA = 25°C. This ultra-low leakage ensures minimal power loss in always-on systems and avoids signal distortion in high-impedance sensor interfaces - a key advantage over higher-leakage alternatives in battery-powered or precision analog applications.
Can SMBJ8V0A be used in place of SMBJ8.0 or SMBJ8.0A from other manufacturers?
Yes, SMBJ8V0A is functionally and mechanically equivalent to SMBJ8.0A from ON Semiconductor and P6SMB8.0A from Littelfuse - sharing identical VWM (8.0 V), VBR (8.89–9.83 V), VC (13.6 V), DO-214AA package, and 600 W PPK rating. All three meet ISO 7637-2 and are qualified for automotive use; SMBJ8V0A is a direct replacement with no PCB or layout changes required, provided the cathode band orientation is maintained.
SMBJ8V0A 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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 44.1A
- 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)
SMBJ8V0A FAQ
1.How can I place an order for SMBJ8V0A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8V0A 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 SMBJ8V0A reliable?
The price and inventory of SMBJ8V0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8V0A is usually 5 days.
3.What payment methods are accepted for SMBJ8V0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8V0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8V0A?
SMBJ8V0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8V0A 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 SMBJ8V0A?
For technical support, including SMBJ8V0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8V0A requirements.
6.How does Aetrix verify that SMBJ8V0A is sourced from the original manufacturer or authorized distributors?
All SMBJ8V0A 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 SMBJ8V0A meets industry standards.
7.What is the process for return or replacement of SMBJ8V0A?
All SMBJ8V0A units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8V0A, 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 SMBJ8V0A part is unused and in its original packaging.
Return procedure for SMBJ8V0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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