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Taiwan Semiconductor Corporation SMBJ9.0C
- Part No.:
- SMBJ9.0C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ9.0C.pdf
- Description:
- 600W, 11.1V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,527
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Product details
Overview
SMBJ9.0C 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 9.0V working stand-off voltage (VWM), 10.0–12.2V breakdown voltage (VBR), and clamps transients to ≤16.9V at 5A peak impulse current (IPP), making it suitable for automotive body electronics and industrial I/O protection.
For engineers reviewing the SMBJ9.0C datasheet, SMBJ9.0C pinout, SMBJ9.0C application, or SMBJ9.0C equivalent, key selection criteria include clamping voltage under 17V, sub-1μA leakage at 9V, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and DO-214AA thermal performance with RθJA = 55°C/W.
Technical Context
The SMBJ9.0C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (10.0–12.2V @ 1mA). Its glass-passivated junction ensures stable breakdown and low leakage (<5μA @ 9.0V), while fast response time (<1.0ps) enables effective suppression of EFT and lightning-induced surges.
Thermally, it supports continuous operation up to +150°C junction temperature, with RθJC = 10°C/W and RθJA = 55°C/W. Its 600W peak pulse power rating (10/1000μs waveform) and 37A maximum IPP are derated linearly above 25°C ambient per Fig.2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin. |
| VBR min/max | 10.0 / 12.2 V @ 1 mA - Confirmed avalanche onset range; ensures reliable triggering without premature breakdown. |
| VC @ IPP | 16.9 V @ 5 A - Clamped voltage during 10/1000μs surge; limits downstream IC stress to <17V. |
| ID @ VWM | <5 μA - Ultra-low leakage at rated stand-off; avoids power loss in battery-backed or low-quiescent systems. |
| PPK | 600 W - Peak pulse power handling (10/1000μs); meets Level 4 IEC 61000-4-5 surge immunity requirements. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive and industrial environments. |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 0.090g mass; compatible with automated reflow assembly. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode band marking polarity, UL 94V-0 flammability rating, and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND) in unidirectional configuration; carries forward surge current up to 100A (IFSM). |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 9V rail); initiates avalanche conduction when transient exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress without parameter drift. |
| Clamping voltage ≤16.9V @ 5A | Provides robust protection margin for 5V–12V logic and microcontroller I/O pins against ISO 7637-2 pulses. |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow; supports standard SMT manufacturing flow without special handling. |
| RoHS & halogen-free compliant | Fulfills EU environmental directives and IPC/JEDEC standards for green electronics manufacturing. |
| Fast response <1.0 ps | Responds before most system-level transients propagate, preventing latch-up or gate oxide damage in CMOS ICs. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12V supply rail and LIN bus lines in door module ECUs from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between VBAT and GND, absorbing 600W transients without failure. Use Value: Maintains system uptime by preventing MCU reset or CAN transceiver damage during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff protection device mounted at connector entry point, shunting >1kV transients to ground. Use Value: Enables >100,000 actuation cycles without degradation, verified per IEC 61000-4-5 Level 3 (2kV line-earth). |
| LED Driver Power Supply Input | RS-485 Communication Line Protection |
Use Scenario: Suppressing inductive kickback from relay coils and motor drivers feeding constant-current LED arrays. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input stage, placed upstream of buck controller IC. Use Value: Limits input rail overshoot to <17V, preventing overvoltage shutdown or internal FET avalanche in driver ICs. |
Use Scenario: Protecting RS-485 transceivers (e.g., MAX13487) from ESD and cable discharge events in factory automation networks. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (used with external series resistor) on A/B differential pair. Use Value: Withstands ±15kV contact ESD (IEC 61000-4-2) while maintaining signal integrity below 10pF junction capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ9.0A | VBR = 10.0–11.1V; VC = 15.4V @ 5A; same DO-214AC (SMA) footprint but smaller thermal mass (RθJA = 65°C/W). | Lower clamping voltage but reduced power handling (400W); suited for space-constrained consumer PCBs. | Select when board area is limited and peak surge energy is <400W; verify layout thermal relief for sustained 125°C operation. |
| ON Semiconductor 1.5SMC9.0A | VBR = 10.0–11.1V; VC = 15.4V @ 5A; DO-214AB (SMC) package with higher PPK (1500W) but larger footprint and 0.33g mass. | Higher surge capacity and better thermal dissipation; used where ISO 7637-2 Pulse 5a (load dump) dominates. | Choose for automotive front-end modules requiring >1kW surge margin; requires larger pad layout and reflow profile adjustment. |
Compared with SMBJ9.0C, SMAJ9.0A offers tighter clamping but less thermal robustness, while 1.5SMC9.0A delivers superior power handling at the cost of board space - SMBJ9.0C balances 600W capability, DO-214AA manufacturability, and 16.9V clamping for mid-tier industrial and automotive applications.
Availability
SMBJ9.0C is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, and LED driver power supply designs requiring stable component supply, full traceability, and RoHS-compliant sourcing.
Supply support for SMBJ9.0C 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and MOSFETs since 1979.
The SMBJ series was developed for high-reliability transient suppression in automotive and industrial environments, emphasizing ISO 7637-2 compliance, moisture-insensitive packaging, and tight parametric control across temperature.
FAQ
What is the polarity configuration of SMBJ9.0C?
The SMBJ9.0C is a unidirectional TVS diode, marked with a cathode band indicating the terminal that connects to the protected line (e.g., 9V rail), while the anode connects to ground. This configuration provides asymmetric clamping optimized for DC power rail protection, and it is not interchangeable with bidirectional variants like SMBJ9.0CA without circuit redesign.
Does SMBJ9.0C meet automotive surge immunity standards?
Yes, SMBJ9.0C meets ISO 7637-2 Pulse 1 (inductive load disconnect), Pulse 2a (battery line interruption), Pulse 2b (alternator field decay), and Pulses 3a/3b (capacitive coupling) requirements. Its 600W peak pulse rating and 16.9V clamping voltage ensure robust protection for 12V automotive subsystems such as body control modules and lighting drivers.
What is the maximum leakage current of SMBJ9.0C at its working voltage?
The SMBJ9.0C exhibits a maximum blocking leakage current (ID) of 5 μA at its 9.0V working stand-off voltage (VWM), measured at 25°C. This ultra-low leakage preserves battery life in always-on systems and prevents false triggering in high-impedance sensor interfaces, consistent with its glass-passivated junction construction.
Can SMBJ9.0C be used in bidirectional signal line protection?
No - SMBJ9.0C is strictly unidirectional and unsuitable for AC or bidirectional signal lines without external circuitry. For bidirectional protection (e.g., RS-485, USB), use SMBJ9.0CA or SMBJ9.0C with external series resistors and complementary diodes; the "C" suffix alone does not imply bidirectionality - only "CA" denotes bipolar configuration per TSC ordering code rules.
What is the thermal resistance profile of SMBJ9.0C and how does it affect PCB layout?
SMBJ9.0C has a junction-to-ambient thermal resistance (RθJA) of 55°C/W and junction-to-case (RθJC) of 10°C/W. To maintain TJ ≤150°C under 600W surge, PCB copper area must provide ≥100 mm² of 2-oz thermal pad connected to both terminals; insufficient copper causes localized overheating and premature failure during repetitive surges.
SMBJ9.0C 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 16.9V
- Current - Peak Pulse (10/1000µs):
- 37A
- 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)
SMBJ9.0C FAQ
1.How can I place an order for SMBJ9.0C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ9.0C 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 SMBJ9.0C reliable?
The price and inventory of SMBJ9.0C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ9.0C is usually 5 days.
3.What payment methods are accepted for SMBJ9.0C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ9.0C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ9.0C?
SMBJ9.0C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ9.0C 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 SMBJ9.0C?
For technical support, including SMBJ9.0C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ9.0C requirements.
6.How does Aetrix verify that SMBJ9.0C is sourced from the original manufacturer or authorized distributors?
All SMBJ9.0C 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 SMBJ9.0C meets industry standards.
7.What is the process for return or replacement of SMBJ9.0C?
All SMBJ9.0C units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ9.0C, 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 SMBJ9.0C part is unused and in its original packaging.
Return procedure for SMBJ9.0C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ9.0C Tags
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