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Taiwan Semiconductor Corporation SMBJ90CA
- Part No.:
- SMBJ90CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ90CA.pdf
- Description:
- TVS DIODE 90VWM 146VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,994
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Product details
Overview
SMBJ90CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy ESD and surge protection in DC power rails and signal lines. 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, and 600 W peak pulse power rating with <1.0 ps response time - deployed in automotive body control modules and industrial I/O interfaces.
For engineers reviewing the SMBJ90CA datasheet, SMBJ90CA pinout, SMBJ90CA application, or SMBJ90CA equivalent, key selection criteria include bidirectional clamping symmetry, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, DO-214AA (SMB) package thermal performance (RθJA = 55°C/W), and leakage current ≤1 µA at 90 V.
Technical Context
The SMBJ90CA implements a planar passivated silicon junction optimized for fast transient suppression without degradation under repetitive surges. Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating systems, with breakdown tested at 1 mA and clamping verified per 10/1000 µs waveform per ANSI/IEEE C62.35.
Thermal design relies on low RθJC (10°C/W) and RθJA (55°C/W) values, enabling sustained operation up to TJ = 150°C. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 - supporting lead-free reflow without popcorn cracking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin. |
| VBR min/max | 100 / 122 V @ 1 mA - Verified breakdown range ensures reliable turn-on during transients without premature triggering. |
| VC @ IPP | 160 V @ 3.9 A - Clamping voltage limits downstream IC stress during 10/1000 µs surge events. |
| PPK | 600 W - Peak pulse power handling per single non-repetitive 10/1000 µs event per IEC 61000-4-5. |
| ID @ VWM | ≤1 µA - Ultra-low leakage preserves battery life and signal integrity in always-on circuits. |
| TJ max | +150°C - Enables deployment in under-hood automotive or enclosed industrial enclosures. |
| Package | DO-214AA (SMB) - Standardized surface-mount footprint compatible with automated placement and IPC-7351B land patterns. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (bidirectional symmetry means no functional anode/cathode distinction; band denotes terminal orientation only).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode Band End | Terminal 1 | Marked end of DO-214AA body; electrically identical to Terminal 2 in bidirectional operation. |
| Opposite End | Terminal 2 | Unmarked end; forms symmetrical pair with Terminal 1 for AC or floating bus protection. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC in both polarities - eliminates need for polarity-aware layout in differential or AC-coupled lines. |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (coupled noise) - required for automotive ECUs. |
| Sub-1 ps response | Typically <1.0 ps turn-on - intercepts ESD events before sensitive CMOS inputs enter breakdown. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - supports green manufacturing and export compliance. |
| MSL Level 1 | No floor life limitation - can be stored indefinitely at ≤30°C/60% RH without baking prior to reflow. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protects microcontroller GPIOs and CAN transceiver bias rails from load-dump spikes and alternator ripple in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional TVS clamps both positive and negative transients on shared sensor/power return paths. Use Value: Limits voltage excursion to ≤160 V during ISO 7637-2 Pulse 5a (load dump), preventing latch-up or gate oxide rupture in 3.3 V/5 V logic. |
Use Scenario: Shields 24 V digital input optocouplers from inductive kickback when switching solenoids or relays. IC Role / Device Role / Timing Role: Absorbs 600 W surge energy within 10/1000 µs window, diverting current away from isolation barrier. Use Value: Maintains >10⁶ surge cycles without parameter shift - critical for factory automation equipment with frequent actuator cycling. |
| LED Driver Power Stage | USB-C Port ESD Protection |
Use Scenario: Placed across DC-link capacitors in constant-current LED drivers to suppress MOSFET switching overshoot. IC Role / Device Role / Timing Role: Fast clamping prevents overvoltage stress on driver ICs during PWM edge transitions. Use Value: 160 V VC ensures headroom above 90 V nominal bus, while 1 µA ID avoids quiescent power loss in battery-powered luminaires. |
Use Scenario: Integrated into USB-C receptacle PCB layout to protect CC, SBU, and VCONN lines from human-body-model (HBM) ESD. IC Role / Device Role / Timing Role: Bidirectional operation handles ±8 kV contact discharge per IEC 61000-4-2 without polarity routing constraints. Use Value: Sub-1 ps response captures ESD events before USB-PD controller firmware can react - eliminating false disconnects. |
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 higher RθJA (65°C/W); VBR min/max = 100/122 V identical. | SMA package has larger footprint and lower power density than SMB - requires PCB area increase and derating above 85°C ambient. | Select SMAJ90CA only if existing design uses SMA footprint or requires legacy qualification data. |
| ON Semiconductor SMCJ90CA | DO-214AB (SMC) package; same 90 V VWM and 160 V VC, but rated for 1500 W PPK - over-spec'd for 600 W use cases. | SMC package adds 2.5 mm height and 30% more board area; thermal mass delays response slightly vs. SMB's lower junction-to-case resistance. | Choose SMCJ90CA when system-level surge testing exceeds IEC 61000-4-5 Level 4 and requires margin beyond 600 W. |
Compared with SMBJ90CA, SMAJ90CA trades compact SMB packaging for easier hand-soldering and wider distributor stock, while SMCJ90CA delivers higher surge robustness at the cost of PCB real estate and thermal responsiveness - making SMBJ90CA optimal for space-constrained, thermally demanding automotive and industrial designs.
Availability
SMBJ90CA is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, LED lighting drivers, and USB-C interface protection requiring stable component supply across multi-year production cycles.
Supply support for SMBJ90CA 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, serving automotive, industrial, and consumer markets since 1979.
The SMBJ series was developed specifically for AEC-Q101-qualified transient protection in harsh-environment electronics, emphasizing repeatable clamping performance, low leakage, and robust moisture resistance for under-hood and factory-floor deployment.
FAQ
What is the clamping voltage of SMBJ90CA at its rated peak pulse current?
The SMBJ90CA has a maximum clamping voltage (VC) of 160 V when subjected to its specified peak impulse current (IPP) of 3.9 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry sees no more than 160 V during surge events - a critical parameter for protecting 3.3 V or 5 V logic interfaces. The SMBJ90CA maintains this clamping performance across its full operating temperature range.
Is SMBJ90CA unidirectional or bidirectional, and how does that affect PCB layout?
SMBJ90CA is a bidirectional TVS diode, indicated by the "CA" suffix per Taiwan Semiconductor's ordering convention. Unlike unidirectional variants (e.g., SMBJ90A), it provides symmetrical clamping in both polarities - meaning no anode/cathode orientation is required during placement. This simplifies PCB layout for AC-coupled lines, floating grounds, or differential buses where polarity reversal may occur, eliminating risk of incorrect orientation during assembly.
Does SMBJ90CA meet automotive surge immunity standards?
Yes, SMBJ90CA is explicitly validated to meet ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitively coupled noise). Its 600 W peak pulse rating, 160 V clamping, and 100–122 V breakdown range align directly with test levels defined for 12 V automotive networks. Taiwan Semiconductor documents this compliance in the SMBJ series datasheet revision R2104.
What is the maximum steady-state power dissipation for SMBJ90CA?
The SMBJ90CA has a steady-state power dissipation (PD) rating of 3 W at TA = 25°C, as specified in its Absolute Maximum Ratings table. This value decreases linearly above 25°C per the derating curve in Figure 2 of the datasheet - for example, PD drops to ~1.5 W at 75°C ambient. This rating applies only to continuous DC or low-frequency conditions; transient surge handling (600 W) is separate and non-repetitive.
How does the DO-214AA (SMB) package of SMBJ90CA compare thermally to DO-214AB (SMC)?
The DO-214AA (SMB) package used by SMBJ90CA offers a junction-to-ambient thermal resistance (RθJA) of 55°C/W, versus ~40°C/W for the larger DO-214AB (SMC) package. While SMB sacrifices some thermal efficiency, it delivers superior surge response speed due to lower parasitic inductance and capacitance - critical for sub-nanosecond ESD capture. Engineers selecting SMBJ90CA accept this trade-off for space-constrained, high-speed protection applications.
SMBJ90CA 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:
- 146V
- Current - Peak Pulse (10/1000µs):
- 4.1A
- 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)
SMBJ90CA FAQ
1.How can I place an order for SMBJ90CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ90CA 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 SMBJ90CA reliable?
The price and inventory of SMBJ90CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ90CA is usually 5 days.
3.What payment methods are accepted for SMBJ90CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ90CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ90CA?
SMBJ90CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ90CA 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 SMBJ90CA?
For technical support, including SMBJ90CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ90CA requirements.
6.How does Aetrix verify that SMBJ90CA is sourced from the original manufacturer or authorized distributors?
All SMBJ90CA 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 SMBJ90CA meets industry standards.
7.What is the process for return or replacement of SMBJ90CA?
All SMBJ90CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ90CA, 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 SMBJ90CA part is unused and in its original packaging.
Return procedure for SMBJ90CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ90CA Tags
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