My Inquiry
My Account
Taiwan Semiconductor Corporation SMBJ8.0AH
- Part No.:
- SMBJ8.0AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.0AH.pdf
- Description:
- 600W, 9.4V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,599
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ8.0AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, rated for 600W peak pulse power, 8.0V working stand-off voltage, and 13.6V maximum clamping voltage at 50A peak impulse current. It protects automotive and industrial electronics against ESD, lightning-induced surges, and inductive switching transients.
For engineers reviewing the SMBJ8.0AH datasheet, SMBJ8.0AH pinout, SMBJ8.0AH application, or SMBJ8.0AH equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, leakage current at operating bias, AEC-Q101 qualification status, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b test waveforms.
Technical Context
The SMBJ8.0AH operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 8.89–9.83V breakdown range at 1mA test current. Its glass-passivated junction ensures stable VBR and low leakage (<1μA above 10V), while sub-1ps response time enables effective suppression of fast EFT and ESD events.
Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, supporting operation up to +150°C junction temperature. It meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity, enabling robust reflow compatibility in automated SMT lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR @ IT=1mA | 8.89–9.83 V - Breakdown voltage range ensuring reliable turn-on margin above VWM |
| VC @ IPP=50A | 13.6 V - Clamped voltage during 10/1000µs surge, limiting stress on downstream ICs |
| IPP max | 50 A - Peak surge current capability under standardized 10/1000µs waveform |
| PPK | 600 W - Non-repetitive peak pulse power rating defining transient energy handling |
| ID @ VWM | <1 µA - Low leakage ensures minimal power loss and signal integrity in standby |
| Junction temp | –55°C to +150°C - Enables deployment in under-hood automotive and industrial environments |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. Weight: 0.090g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / Ground reference in unidirectional configuration | Connected to system ground or low-side return; defines polarity for surge shunting |
| Cathode | Protected line input / High-side connection | Connected to signal/power line requiring protection; conducts surge current to ground when VREV > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard |
| Glass passivated junction | Enhances long-term stability of VBR and reduces parameter drift under thermal stress and humidity |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT) without degradation |
| Fast response time | <1 ps - Ensures clamping activation prior to damage threshold of sensitive CMOS interfaces |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive for environmentally compliant manufacturing |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins connected to 12V battery rail subject to load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges exceeding 13.6V while remaining non-conductive below 8.0V. Use Value: Prevents latch-up or gate oxide rupture in 5V/3.3V logic devices by limiting transient overvoltage to safe levels per ISO 7637-2 Pulse 1. | Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors in PLC modules exposed to EFT noise on 24V supply lines. IC Role / Device Role / Timing Role: Standoff diode absorbing repetitive 5kHz EFT bursts (Pulse 3b) without degradation, maintaining <1µA leakage at 24V nominal. Use Value: Eliminates false readings and resets caused by transient-induced ADC saturation or comparator mis-triggering. |
| LED Driver Output Protection | USB Port ESD Suppression |
Use Scenario: Shielding constant-current LED driver outputs from inductive kickback during MOSFET switching in automotive lighting modules. IC Role / Device Role / Timing Role: Fast-acting unidirectional clamp across output terminals, conducting surge energy to ground within <1ps to prevent driver IC failure. Use Value: Extends lifetime of high-brightness LED arrays by preventing catastrophic failure of driver ICs during PWM switching transitions. | Use Scenario: Providing secondary-level ESD protection on USB 2.0 data lines (D+/D−) in infotainment head units where primary protection resides upstream. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ < 100pF at 0V) placed adjacent to connector to divert ±15kV contact discharge per IEC 61000-4-2. Use Value: Maintains signal integrity at 480Mbps while meeting automotive ESD immunity requirements without adding jitter or reflection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A | Same VWM/VBR/VC specs but lacks AEC-Q101 qualification and ISO 7637-2 validation | Not suitable for automotive Tier-1 designs requiring certified surge immunity | Select SMBJ8.0AH when compliance with automotive EMC standards is mandatory |
| SAC8.0 | Higher VC = 15.0V at 50A; lower PPK = 400W; same DO-214AA package | Reduced clamping margin may risk overvoltage on 5V logic; limited to less severe surge environments | Choose SMBJ8.0AH for higher energy absorption and tighter clamping in critical systems |
Compared with SMBJ8.0A and SAC8.0, the SMBJ8.0AH delivers certified automotive reliability, lower clamping voltage, and full ISO 7637-2 coverage-making it the preferred choice for safety-critical 12V power rail protection where transient margin and qualification traceability are essential.
Availability
SMBJ8.0AH is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and LED lighting systems requiring stable component supply with guaranteed AEC-Q101 compliance and ISO 7637-2 validation.
Supply support for SMBJ8.0AH 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 high-reliability transient suppression in automotive electronics, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in compact SMB packages.
FAQ
What is the breakdown voltage range of SMBJ8.0AH at 1mA test current?
The SMBJ8.0AH has a specified breakdown voltage (VBR) range of 8.89V to 9.83V when measured at IT = 1mA, per the Taiwan Semiconductor datasheet revision A2102. This tight tolerance ensures consistent turn-on behavior across production lots and supports reliable overvoltage protection design margins for 8.0V nominal systems. The SMBJ8.0AH maintains this specification across its full operating temperature range.
Is SMBJ8.0AH suitable for bidirectional transient suppression?
No, SMBJ8.0AH is a unidirectional TVS diode and must not be used for bidirectional protection. Its cathode band marking indicates polarity-sensitive placement. For bidirectional applications, Taiwan Semiconductor specifies parts with "CH" or "CAH" suffixes (e.g., SMBJ8.0CH). Using SMBJ8.0AH in reverse-biased configurations risks permanent damage due to forward conduction during negative transients.
Does SMBJ8.0AH meet automotive qualification standards?
Yes, SMBJ8.0AH is explicitly AEC-Q101 qualified and validated for automotive use. It complies with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test waveforms, and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity. These qualifications are documented in the official Taiwan Semiconductor SMBJH series datasheet (Version A2102) and confirmed on authorized distributor listings.
What is the maximum clamping voltage of SMBJ8.0AH under a 50A 10/1000µs surge?
The SMBJ8.0AH exhibits a maximum clamping voltage (VC) of 13.6V when subjected to a 50A peak current with a 10/1000µs waveform, as specified in the Electrical Specifications table of the Taiwan Semiconductor datasheet. This value represents the worst-case voltage seen by protected circuitry during surge events and is critical for ensuring compatibility with 5V or 3.3V logic supply rails.
Can SMBJ8.0AH be used in automated SMT assembly processes?
Yes, SMBJ8.0AH is optimized for automated placement with DO-214AA (SMB) packaging, matte tin-plated leads compliant with J-STD-002 solderability, and J-STD-020 Level 1 moisture sensitivity rating. Its glass-passivated junction and robust thermal performance (RθJA = 55°C/W) support standard reflow profiles without parametric shift or mechanical failure.
SMBJ8.0AH 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:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 46A
- 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)
SMBJ8.0AH FAQ
1.How can I place an order for SMBJ8.0AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.0AH 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 SMBJ8.0AH reliable?
The price and inventory of SMBJ8.0AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ8.0AH is usually 5 days.
3.What payment methods are accepted for SMBJ8.0AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.0AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.0AH?
SMBJ8.0AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.0AH 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 SMBJ8.0AH?
For technical support, including SMBJ8.0AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.0AH requirements.
6.How does Aetrix verify that SMBJ8.0AH is sourced from the original manufacturer or authorized distributors?
All SMBJ8.0AH 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 SMBJ8.0AH meets industry standards.
7.What is the process for return or replacement of SMBJ8.0AH?
All SMBJ8.0AH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.0AH, 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 SMBJ8.0AH part is unused and in its original packaging.
Return procedure for SMBJ8.0AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.0AH Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
