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Taiwan Semiconductor Corporation SMBJ10CA
- Part No.:
- SMBJ10CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ10CA.pdf
- Description:
- TVS DIODE 10VWM 17VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,335
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Product details
Overview
SMBJ10CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy ESD and surge protection in power rails and signal lines. It features a 10 V working stand-off voltage (VWM), 18.8 V maximum clamping voltage (VC@IPP) at 33 A peak pulse current, and 600 W peak pulse power rating with DO-214AA (SMB) package - used in automotive lighting control modules, industrial I/O protection, and USB port ESD hardening.
For engineers reviewing the SMBJ10CA datasheet, SMBJ10CA pinout, SMBJ10CA application, or SMBJ10CA equivalent, key selection criteria include bidirectional clamping symmetry, low leakage (<1 µA @ 10 V), ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, junction temperature range (–55°C to +150°C), and SMB package thermal resistance (RθJA = 55°C/W).
Technical Context
The SMBJ10CA operates as a silicon avalanche diode with glass-passivated junction, enabling fast response (<1.0 ps) and stable breakdown behavior under repetitive transients. Its bidirectional configuration ensures symmetrical clamping in both polarities, critical for AC-coupled or floating signal paths.
It delivers 600 W non-repetitive peak impulse power (10/1000 µs waveform) with a maximum clamping voltage of 18.8 V at 33 A, while maintaining <1 µA blocking leakage above 10 V. Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, supporting reliable operation up to TJ = 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse operating voltage before significant leakage begins; sets system rail margin for protection activation. |
| VBR min / max | 11.1 V / 13.6 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold consistency across production lots. |
| VC@IPP | 18.8 V at 33 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs during transient events. |
| PPK | 600 W - Peak pulse power handling capability; enables robust protection against ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 2b (battery disconnect). |
| ID@VWM | <1 µA - Reverse leakage at rated stand-off voltage; ensures minimal power loss and no interference with low-current sensor or logic circuits. |
| TJ max | +150°C - Maximum junction temperature; supports operation in under-hood automotive environments and enclosed industrial enclosures. |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 0.090 g mass, UL 94V-0 molding, and matte tin-plated leads per J-STD-002. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking; dual axial terminals; polarity indicated by cathode band (bidirectional function means band denotes common reference point, not unidirectional polarity).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Cathode Band Side) | Reference terminal for bidirectional clamping | Terminal adjacent to cathode band serves as common node; clamps positive transients to this node and negative transients away from it - symmetric conduction path. |
| Cathode (Opposite Band) | Reference terminal for bidirectional clamping | Terminal opposite cathode band forms second clamping node; completes symmetrical avalanche path for ± surges without polarity dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable breakdown voltage over time and temperature; prevents moisture-induced parameter drift in humid environments. |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive load-dump, supply interruption, and coupling noise immunity - eliminates need for external validation testing. |
| Moisture sensitivity level 1 (J-STD-020) | Enables direct placement without baking; reduces manufacturing cost and avoids moisture-related popcorning during reflow. |
| RoHS & halogen-free (IEC 61249-2-21) | Meets global environmental compliance requirements for automotive and industrial end equipment without sacrificing electrical performance. |
| Fast response time <1.0 ps | Clamps ESD events before sensitive CMOS inputs reach destructive voltage thresholds - critical for USB, CAN, and Ethernet PHY protection. |
Applications
| Automotive Lighting Control | Industrial PLC Digital I/O |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontroller GPIOs from load-dump transients during headlamp switching in 12 V vehicle systems. IC Role / Device Role: Bidirectional TVS placed across VCC–GND and signal lines to clamp ±100 V spikes from relay coil collapse. Use Value: Limits clamped voltage to ≤18.8 V, preventing latch-up or gate oxide damage in 5 V/3.3 V logic interfaces while surviving repeated ISO 7637-2 Pulse 2b events. |
Use Scenario: Shielding 24 V digital input cards from field-wiring induced surges and EFT bursts in factory automation cabinets. IC Role / Device Role: Primary surge suppression device on each channel's input line, mounted directly at connector entry point. Use Value: Withstands 33 A peak impulse current and maintains <1 µA leakage at 24 V nominal, ensuring no false triggering or signal attenuation during steady-state operation. |
| USB 2.0 Port Protection | AC-DC Adapter Feedback Loop |
Use Scenario: Safeguarding USB D+/D− data lines and VBUS against human-body-model (HBM) ESD and cable discharge events. IC Role / Device Role: Low-capacitance bidirectional TVS placed between differential pair and ground, leveraging symmetric clamping to preserve signal integrity. Use Value: Clamps ±8 kV contact ESD to <18.8 V within <1 ps, avoiding data corruption or PHY reset while adding <1 pF parasitic capacitance (per curve Fig.5). |
Use Scenario: Protecting optocoupler feedback pins in isolated AC-DC power supplies from secondary-side surge coupling via transformer parasitics. IC Role / Device Role: Standoff-rated TVS across optocoupler input terminals to prevent false regulation or latch-up during lightning-induced surges. Use Value: 10 V VWM aligns with typical 5–12 V feedback voltage ranges; 18.8 V VC ensures TL431 or shunt regulator remains within safe operating area during 600 W transients. |
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 SMAJ10CA | Same DO-214AC (SMA) package; 18.8 V VC@33 A; slightly higher RθJA (65°C/W vs. 55°C/W); identical VWM/VBR specs. | Lower power density due to larger thermal resistance - requires more PCB copper area for same ambient derating. | Preferred where SMA footprint already standardized; verify layout thermal relief matches SMBJ10CA's tighter RθJA requirement. |
| ON Semiconductor SMCJ10CA | DO-214AB (SMC) package; 1000 W PPK rating; 19.0 V [email protected] A; identical VWM/VBR but higher surge capacity. | Over-specified for 600 W use cases; larger footprint and higher cost; better suited for heavy-duty industrial surge zones. | Select when future-proofing for higher-energy threats (e.g., IEC 61000-4-5 Level 4) or when SMC footprint is already committed. |
Compared with SMAJ10CA and SMCJ10CA, SMBJ10CA offers optimal balance of 600 W surge handling, SMB footprint compactness, and 55°C/W thermal resistance - making it ideal for space-constrained automotive and industrial modules where precise thermal management and board area efficiency are critical.
Availability
SMBJ10CA is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC I/O protection, and USB 2.0 port hardening requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ10CA 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, MOSFETs, and power management devices.
The SMBJ series was developed specifically for AEC-Q200-compliant automotive and harsh-environment industrial applications, emphasizing high surge robustness, tight parametric distribution, and extended temperature reliability.
FAQ
What is the clamping voltage of SMBJ10CA at its rated peak pulse current?
The SMBJ10CA has a maximum clamping voltage (VC) of 18.8 V when subjected to its rated peak impulse current (IPP) of 33 A using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits remain below destructive voltage thresholds during standardized surge events - a key parameter verified in every SMBJ10CA production lot.
Is SMBJ10CA unidirectional or bidirectional, and how is polarity marked?
SMBJ10CA is a bidirectional TVS diode, indicated by the "CA" suffix per Taiwan Semiconductor's ordering convention. It features symmetrical breakdown in both directions and uses a single cathode band to denote the reference terminal - unlike unidirectional variants (e.g., SMBJ10A), no anode/cathode functional distinction applies during operation.
Does SMBJ10CA meet automotive surge immunity standards?
Yes, SMBJ10CA meets ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a (sudden load removal), Pulse 2b (supply disconnection), and Pulses 3a/3b (coupled transients), as confirmed in Taiwan Semiconductor's official documentation. Its 600 W rating and 18.8 V clamping make it suitable for 12 V automotive subsystems including body control modules and lighting drivers.
What is the maximum junction temperature and thermal resistance of SMBJ10CA?
The SMBJ10CA has a maximum junction temperature (TJ) of +150°C and thermal resistances of RθJC = 10°C/W (junction-to-case) and RθJA = 55°C/W (junction-to-ambient). These values are measured per JEDEC standards and enable reliable operation in sealed enclosures or under-hood environments when mounted on standard 1 oz. copper PCB pads.
How does SMBJ10CA differ from SMBJ10A?
SMBJ10CA is bidirectional with symmetrical clamping in both polarities, while SMBJ10A is unidirectional and conducts only in reverse bias. The "CA" suffix explicitly denotes bipolar functionality - critical for AC signal lines or floating grounds. Electrically, SMBJ10CA shares the same VWM (10 V), VBR (11.1–13.6 V), and VC (18.8 V) ratings, but its I-V curve is mirrored about zero volts.
SMBJ10CA 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:
- 2
- Voltage - Reverse Standoff (Typ):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 35.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ10CA FAQ
1.How can I place an order for SMBJ10CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ10CA 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 SMBJ10CA reliable?
The price and inventory of SMBJ10CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ10CA is usually 5 days.
3.What payment methods are accepted for SMBJ10CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ10CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ10CA?
SMBJ10CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ10CA 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 SMBJ10CA?
For technical support, including SMBJ10CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ10CA requirements.
6.How does Aetrix verify that SMBJ10CA is sourced from the original manufacturer or authorized distributors?
All SMBJ10CA 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 SMBJ10CA meets industry standards.
7.What is the process for return or replacement of SMBJ10CA?
All SMBJ10CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ10CA, 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 SMBJ10CA part is unused and in its original packaging.
Return procedure for SMBJ10CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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