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Taiwan Semiconductor Corporation SMBJ16
- Part No.:
- SMBJ16
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ16.pdf
- Description:
- 600W, 19.8V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,681
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Product details
Overview
SMBJ16 from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection in DC power rails and signal lines. It features a 16V working stand-off voltage (VWM), 17.8–21.8V breakdown voltage (VBR), and clamps transients to ≤28.8V at 21.8A peak impulse current (IPP), making it suitable for automotive load-dump and industrial I/O port protection.
For engineers reviewing the SMBJ16 datasheet, SMBJ16 pinout, SMBJ16 application, or SMBJ16 equivalent, key selection criteria include its 600W peak pulse power rating, 10/1000µs waveform compliance, ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity support, low leakage (<1µA @ 16V), and UL 94V-0 molded case - all critical for robust ESD and EFT hardening in embedded control systems.
Technical Context
The SMBJ16 operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1.0ps) and stable clamping under repetitive or single-event transients. Its thermal design supports 150°C maximum junction temperature and 55°C/W junction-to-ambient resistance, allowing reliable operation in ambient temperatures up to +125°C when derated per Fig.2.
It complies with ISO 7637-2 for automotive transient immunity and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity. Polarity is marked by cathode band; forward voltage is 3.5V @ 50A (per unidirectional SMBJ5.0–SMBJ90 family specification).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR min/max | 17.8 / 21.8 V @ 1 mA - Breakdown occurs within this range; ensures predictable turn-on during overvoltage events. |
| VC @ IPP | 28.8 V @ 21.8 A - Clamping voltage under 10/1000µs surge; limits downstream IC stress to safe levels. |
| PPK | 600 W - Peak pulse power handling capability; sustains high-energy transients without failure. |
| ID @ VWM | <1 µA - Ultra-low leakage at rated stand-off; avoids unnecessary power loss in battery-powered systems. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive or high-temperature industrial enclosures. |
| Package | DO-214AA (SMB) - Standard surface-mount outline with 0.090g mass; compatible with automated SMT placement and reflow. |
Pinout & Package
DO-214AA (SMB) package: Cathode-marked unidirectional device with two terminals - anode (unmarked end) and cathode (banded end). Matte tin-plated leads meet J-STD-002 solderability requirements. Polarity must be observed during PCB layout to ensure correct surge shunting path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path | Connected to ground or low-impedance return node; completes clamping loop during transient event. |
| Cathode | Protected line connection | Connected to protected line (e.g., 12V rail or CAN bus); conducts avalanche current when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over time and temperature; prevents degradation from humidity or bias stress. |
| Fast response time <1.0 ps | Clamps transients before sensitive logic or analog circuitry experiences overvoltage damage. |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive-level load dump, supply interruption, and coupled noise immunity testing. |
| UL 94V-0 molding compound | Provides flame-retardant housing essential for safety-critical industrial and transportation applications. |
| J-STD-020 Level 1 moisture sensitivity | Enables standard SMT assembly without baking; reduces manufacturing overhead and risk of popcorning. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V/24V power distribution networks in engine control units (ECUs) and body electronics against load-dump surges and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground to clamp transients exceeding 16V. Use Value: Limits peak voltage to ≤28.8V during 600W surges, preventing latch-up or gate oxide rupture in downstream PMICs and microcontrollers. |
Use Scenario: Shielding analog sensor inputs (e.g., pressure, temperature) on PLC I/O modules from EFT and ESD coupling via field wiring. IC Role / Device Role / Timing Role: Standoff protector on signal line with cathode tied to signal and anode to ground, absorbing fast-rising noise bursts. Use Value: Sub-1ps response ensures clamping before 10ns edge rates propagate into ADC front-ends, preserving measurement integrity. |
| LED Driver Output Protection | RS-485 Transceiver Bus Line Protection |
Use Scenario: Safeguarding constant-current LED driver outputs in streetlight controllers exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Unidirectional TVS connected across output terminals to clamp reverse polarity and inductive kickback. Use Value: Withstands 100A IFSM surge and maintains <1µA leakage at 16V, ensuring no impact on dimming accuracy or efficiency. |
Use Scenario: Hardening RS-485 differential bus lines (A/B) in factory automation networks against ESD and induced transients. IC Role / Device Role / Timing Role: Dual-SMBJ16 devices (one per line) referenced to ground, providing symmetric clamping on data lines. Use Value: 28.8V clamping voltage stays below RS-485 receiver absolute maximum ratings (±15V common-mode), preventing permanent damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16A | Lower VBR range (17.8–19.7V) and lower VC (26.0V @ 24.2A); tighter tolerance and improved clamping consistency. | Better suited for precision rail protection where lower clamping voltage margin is required. | Select SMBJ16A when tighter VBR distribution and reduced VC improve system-level surge margin. |
| SMCJ16 | Same VWM/VBR specs but in larger DO-214AB (SMC) package; higher PPK (1500W) and lower RθJA (30°C/W). | Used where higher surge energy handling or better thermal dissipation is needed in space-permitting designs. | Choose SMCJ16 only if board layout allows larger footprint and thermal management justifies the size increase. |
Compared with SMBJ16, SMBJ16A offers tighter breakdown control and lower clamping voltage for enhanced protection fidelity, while SMCJ16 trades package size for significantly higher surge capacity and thermal performance - neither is pin-compatible, but both serve adjacent design needs in TVS selection.
Availability
SMBJ16 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and LED driver output safeguarding requiring stable component supply and full traceability.
Supply support for SMBJ16 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 for high-reliability transient suppression in automotive and industrial environments, emphasizing robustness, standardized packaging, and compliance with ISO 7637-2 and RoHS/halogen-free requirements.
FAQ
What is the clamping voltage of SMBJ16 under a 10/1000µs surge?
The SMBJ16 clamps to a maximum of 28.8 V when subjected to its rated peak impulse current of 21.8 A with a 10/1000µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components remain within safe voltage limits during standardized surge events. The SMBJ16 datasheet specifies this as VC@IPP, confirmed in Table "ELECTRICAL SPECIFICATIONS" on page 2 of Revision R2104.
Is SMBJ16 unidirectional or bidirectional?
SMBJ16 is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix and confirmed by its single cathode band marking and forward voltage specification (VF = 3.5 V @ 50 A). Bidirectional variants require explicit "C" or "CA" designation per ordering code notes - SMBJ16 does not carry either, and its electrical characteristics are defined only for reverse-biased operation.
Does SMBJ16 meet automotive transient immunity standards?
Yes, SMBJ16 meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (supply interruption), Pulse 3a (capacitive coupling), and Pulse 3b (inductive coupling), as explicitly stated in the FEATURES section of the Taiwan Semiconductor SMBJ Series datasheet R2104. This makes SMBJ16 suitable for ECUs, body control modules, and other automotive electronics.
What is the maximum junction temperature rating for SMBJ16?
The SMBJ16 has a maximum junction temperature (TJ) rating of +150°C, as specified in the ABSOLUTE MAXIMUM RATINGS table. This allows operation in high-temperature environments such as under-hood automotive locations or enclosed industrial drives, provided thermal derating per Fig.2 is applied above TA = 25°C. The SMBJ16's RθJA of 55°C/W supports this rating in typical PCB layouts.
Can SMBJ16 be used in place of SMBJ16A?
SMBJ16 and SMBJ16A are not direct replacements: SMBJ16A has a tighter VBR range (17.8–19.7V vs. 17.8–21.8V) and lower clamping voltage (26.0V vs. 28.8V), resulting in different surge response behavior. While both share the same VWM and package, the SMBJ16A's improved parameters may affect system-level margin validation. Use SMBJ16 only when its broader VBR tolerance and higher VC are acceptable per your design's transient test plan.
SMBJ16 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):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 28.8V
- Current - Peak Pulse (10/1000µs):
- 21.8A
- 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)
SMBJ16 FAQ
1.How can I place an order for SMBJ16 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ16 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 SMBJ16 reliable?
The price and inventory of SMBJ16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ16 is usually 5 days.
3.What payment methods are accepted for SMBJ16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ16?
SMBJ16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ16 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 SMBJ16?
For technical support, including SMBJ16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ16 requirements.
6.How does Aetrix verify that SMBJ16 is sourced from the original manufacturer or authorized distributors?
All SMBJ16 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 SMBJ16 meets industry standards.
7.What is the process for return or replacement of SMBJ16?
All SMBJ16 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ16, 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 SMBJ16 part is unused and in its original packaging.
Return procedure for SMBJ16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ16 Tags
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