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Taiwan Semiconductor Corporation SMBJ90C
- Part No.:
- SMBJ90C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ90C.pdf
- Description:
- 600W, 111V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:6,270
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Product details
Overview
SMBJ90C from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy ESD and surge protection in automotive and industrial power rails. It features a 90 V working stand-off voltage (VWM), 100–122 V breakdown voltage (VBR), 160 V maximum clamping voltage (VC) at 3.9 A peak impulse current (IPP), and 600 W peak pulse power rating with sub-1 ps response time.
For engineers reviewing the SMBJ90C datasheet, SMBJ90C pinout, SMBJ90C application, or SMBJ90C equivalent, key selection criteria include unidirectional vs. bidirectional configuration (C suffix = bidirectional), clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature limits (−55°C to +150°C), and compatibility with automated SMT placement on 1.5 mm pitch PCBs.
Technical Context
The SMBJ90C implements a silicon avalanche diode structure with glass-passivated junction, enabling fast transient suppression without degradation under repeated 10/1000 µs surges. Its bidirectional configuration allows symmetrical clamping across both polarities, eliminating need for polarity-aware layout in DC bus or AC-coupled signal lines.
Thermal design relies on low junction-to-case resistance (RθJC = 10 °C/W) and moderate junction-to-ambient resistance (RθJA = 55 °C/W), supporting continuous operation up to 150 °C junction temperature when mounted on ≥1 cm² copper area. Leakage current remains ≤1 µA at 90 V (VWM), ensuring minimal standby power impact in always-on systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse voltage before significant leakage; defines safe operating window for 72–90 V DC bus protection. |
| VBR min/max | 100–122 V @ 1 mA - Confirmed avalanche onset range; ensures reliable triggering above system overvoltage thresholds. |
| VC @ IPP | 160 V @ 3.9 A - Clamped voltage during 10/1000 µs surge; determines protected IC's maximum stress level. |
| PPK | 600 W - Peak pulse power handling per single 10/1000 µs event; meets ISO 7637-2 Pulse 5a requirements. |
| IR @ VWM | <1 µA - Ultra-low blocking leakage at rated stand-off; avoids loading of high-impedance sensor or reference circuits. |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 4.58 mm × 3.94 mm footprint and 2.29 mm height; compatible with J-STD-020 Level 1 moisture sensitivity. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive use with appropriate thermal relief. |
Pinout & Package
DO-214AA (SMB) package: dual-leaded, molded plastic case with cathode band marking for unidirectional variants; SMBJ90C is bidirectional and marked with "NW" code - no polarity marking required. Cathode/anode terminals are symmetric and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bidirectional avalanche junction terminals | Electrically identical; either terminal may connect to line or ground - enables flexible placement in differential or floating rail protection. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and humidity exposure; eliminates risk of parametric drift in humid environments (e.g., outdoor lighting). |
| Sub-1 ps response time | Clamps transients before sensitive logic or analog circuitry experiences voltage overshoot - critical for CAN FD, LIN, or RS-485 interface protection. |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise); reduces need for additional validation testing. |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - supports green manufacturing and export compliance without material waivers. |
| Matte tin-plated leads | Solderable per J-STD-002; eliminates lead-free solder wetting issues and whisker growth risk (JESD 201 Class 2 verified). |
Applications
| Automotive Power Rail Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary surge clamp on main power input, placed upstream of DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤160 V during ISO 7637-2 Pulse 5a events, preventing latch-up or gate oxide damage in downstream PMICs and MCUs. |
Use Scenario: Digital input modules receiving 24 V DC signals from field sensors in factory automation. IC Role / Device Role / Timing Role: Input-side TVS on each channel, protecting optocoupler inputs and level-shifting buffers. Use Value: Absorbs repetitive EFT bursts (IEC 61000-4-4) with <1 µA leakage at 24 V, avoiding false triggering or signal attenuation. |
| LED Driver Overvoltage Clamp | RS-485 Transceiver Bus Protection |
Use Scenario: Constant-current LED drivers subjected to hot-swap and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional clamp across output terminals to suppress flyback spikes and ESD. Use Value: Symmetric clamping (±160 V) prevents reverse-bias overstress on LED strings and driver FETs during polarity-reversal faults. |
Use Scenario: Industrial RS-485 networks routed alongside AC power cables in noisy plant environments. IC Role / Device Role / Timing Role: Common-mode TVS on A/B bus lines referenced to ground, placed adjacent to transceiver. Use Value: Sub-1 ps response captures fast edge-induced transients before they propagate into transceiver input stages, preserving signal integrity. |
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 SMAJ90CA | Same DO-214AC (SMA) package; 160 V VC @ 3.9 A, but 400 W PPK rating (vs. 600 W for SMBJ90C). | Lower surge energy handling; suitable only where ISO 7637-2 Pulse 5a is not required. | Select SMBJ90C when full 600 W surge margin is needed for automotive-grade robustness. |
| ON Semiconductor 1.5SMC90CA | DO-214AB (SMC) package (larger footprint); 160 V VC @ 3.9 A, 600 W PPK, but RθJA = 35 °C/W (vs. 55 °C/W for SMBJ90C). | Higher thermal efficiency but requires more PCB area; less suitable for space-constrained modules. | Choose SMBJ90C for compact designs where 4.58 × 3.94 mm footprint and J-STD-020 Level 1 moisture rating are critical. |
Compared with SMAJ90CA and 1.5SMC90CA, SMBJ90C delivers identical clamping performance in a smaller DO-214AA package with superior surge rating versus SMAJ90CA and better space efficiency versus 1.5SMC90CA - making it optimal for high-density automotive and industrial control boards.
Availability
SMBJ90C is available at Aetrix Electronics and suitable for automotive ECU power rail protection, industrial PLC I/O conditioning, and LED driver overvoltage clamping requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMBJ90C 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs since 1979.
The SMBJ series was developed for high-reliability transient suppression in automotive and industrial environments, emphasizing robustness under ISO 7637-2, tight VBR tolerances, and automated assembly compatibility.
FAQ
What does the 'C' suffix in SMBJ90C indicate?
The 'C' suffix in SMBJ90C denotes bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBJ90A), SMBJ90C has no cathode marking and functions identically regardless of terminal orientation, simplifying layout for AC-coupled or floating-rail applications.
Is SMBJ90C compliant with automotive standards such as ISO 7637-2?
Yes, SMBJ90C is explicitly validated to meet ISO 7637-2 test pulses 1, 2a, 2b, 3a, and 3b per Taiwan Semiconductor's datasheet (Version R2104). Its 600 W peak pulse power rating and 160 V clamping voltage ensure robust protection against load dump, battery disconnection, and switching transients common in 12 V/24 V vehicle electrical systems.
What is the maximum clamping voltage of SMBJ90C and at what current is it specified?
The maximum clamping voltage (VC) of SMBJ90C is 160 V, measured at a peak impulse current (IPP) of 3.9 A using the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and is confirmed across production lots per ANSI/IEEE C62.35.
Can SMBJ90C be used in place of unidirectional TVS diodes like SMBJ90A?
No - SMBJ90C is bidirectional and cannot replace unidirectional SMBJ90A in circuits requiring forward conduction or polarity-specific clamping (e.g., DC power rail with defined ground reference). Using SMBJ90C in such cases introduces unnecessary leakage path during normal operation and may compromise protection effectiveness.
What is the moisture sensitivity level (MSL) and reflow profile compatibility of SMBJ90C?
SMBJ90C has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it is not moisture-sensitive and can be stored indefinitely at ambient conditions without dry-pack requirements. It supports standard lead-free reflow profiles with peak temperatures up to 260 °C, fully compatible with automated SMT assembly lines.
SMBJ90C 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):
- 90V
- Voltage - Breakdown (Min):
- 100V
- Voltage - Clamping (Max) @ Ipp:
- 160V
- Current - Peak Pulse (10/1000µs):
- 3.9A
- 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)
SMBJ90C FAQ
1.How can I place an order for SMBJ90C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ90C 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 SMBJ90C reliable?
The price and inventory of SMBJ90C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ90C is usually 5 days.
3.What payment methods are accepted for SMBJ90C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ90C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ90C?
SMBJ90C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ90C 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 SMBJ90C?
For technical support, including SMBJ90C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ90C requirements.
6.How does Aetrix verify that SMBJ90C is sourced from the original manufacturer or authorized distributors?
All SMBJ90C 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 SMBJ90C meets industry standards.
7.What is the process for return or replacement of SMBJ90C?
All SMBJ90C units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ90C, 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 SMBJ90C part is unused and in its original packaging.
Return procedure for SMBJ90C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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