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Semtech Corporation SMBJ10CA
- Part No.:
- SMBJ10CA
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ10CA.pdf
- Description:
- 1-LINE 10V 35.3A TVS DO-214AA(SM
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SMBJ10CA from Littelfuse is a unidirectional transient voltage suppression (TVS) diode designed for robust overvoltage protection of DC power rails and low-speed signal lines. It features a 10 V working voltage (VRWM), 11.1 V minimum breakdown voltage (VBR), 17.0 V maximum clamping voltage at 13.9 A peak pulse current (IPP), 600 W peak pulse power rating (8/20 µs), and operates across –65 °C to +150 °C. It is commonly deployed in industrial power supplies and automotive body electronics.
For engineers reviewing the SMBJ10CA datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under IEC 61000-4-5 surge conditions, thermal stability at elevated ambient temperatures, unidirectional polarity compatibility with grounded-rail systems, and DO-214AA (SMC) package suitability for high-reliability board-level surge protection.
Technical Context
The SMBJ10CA employs a planar passivated silicon avalanche junction structure optimized for fast response (<1 ps) to transient overvoltages. Its unidirectional configuration provides low leakage (<1 µA at VRWM) and stable reverse standoff behavior up to 10 V, making it suitable for positive-rail protection where cathode is tied to the protected line and anode to ground.
Clamping action occurs via controlled avalanche breakdown above VBR, delivering predictable voltage limiting during 8/20 µs surges up to 13.9 A. Unlike active suppressors such as TDS devices, SMBJ10CA relies solely on passive junction physics-no trigger circuit, FET, or drive logic-resulting in zero latency but fixed dynamic resistance (~0.5 Ω) and temperature-dependent clamping rise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 10 V - Maximum continuous DC or RMS voltage the device blocks without conduction. |
| Breakdown Voltage (VBR) | 11.1–12.3 V at 1 mA - Confirmed avalanche onset threshold; ensures reliable triggering before downstream IC damage. |
| Clamping Voltage (VC) | 17.0 V at IPP = 13.9 A (8/20 µs) - Peak voltage seen by protected circuit during worst-case surge; defines safe margin vs. IC absolute max ratings. |
| Peak Pulse Power (PPK) | 600 W (8/20 µs) - Energy-handling capability per transient; supports Level 4 IEC 61000-4-5 compliance in 2 Ω source impedance systems. |
| Leakage Current (IR) | <1 µA at 10 V - Negligible standby power loss and minimal impact on high-impedance sensing or bias networks. |
| Operating Temperature | –65 °C to +150 °C - Validated performance across automotive under-hood and industrial control cabinet environments. |
Pinout & Package
Package: DO-214AA (SMC), surface-mount, molded plastic case with matte finish, RoHS-compliant lead-free terminations. Dimensions: 7.11 mm × 6.22 mm × 2.34 mm (L × W × H). Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Protected Line Connection | Tied directly to the rail or signal line requiring overvoltage suppression; conducts surge current to ground when clamped. |
| Anode | Ground Reference | Connected to system ground plane; must be low-inductance path to handle 13.9 A surge return current without voltage overshoot. |
Key Features
| Feature | Design Value |
|---|---|
| High Surge Robustness | Withstands 13.9 A (8/20 µs) per IEC 61000-4-5 - Enables single-device protection for 24 V industrial bus interfaces without parallel staging. |
| Low Clamping Ratio | VC / VBR ≈ 1.45 - Tight voltage margin between breakdown and clamping ensures minimal overvoltage stress on downstream 12–15 V-rated components. |
| Wide Thermal Range | Rated from –65 °C to +150 °C - Eliminates derating concerns in engine control units, motor drives, and outdoor power equipment. |
| Low Capacitance | ~120 pF at 0 V - Compatible with <1 MHz analog sensing, CAN bus stubs, and 24 V DC control signals without signal integrity degradation. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controllers (PLCs) exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed upstream of DC-DC converter input to limit surge voltage before regulation. Use Value: 17.0 V clamping ensures protected DC-DC ICs (e.g., LM5017) remain below their 20 V absolute maximum input rating during 13.9 A surges. |
Use Scenario: LIN bus or 12 V sensor supply line in door module or lighting control unit subject to battery reversal and jump-start spikes. IC Role / Device Role / Timing Role: Primary overvoltage guard on fused 12 V rail feeding microcontroller I/O and driver ICs. Use Value: 10 V VRWM matches nominal 12 V system while blocking normal operation; 11.1 V VBR triggers before 13.5 V regulator dropout thresholds. |
| Factory Automation Sensor Interface | Renewable Energy Charge Controller |
Use Scenario: 24 V analog input channel (4–20 mA loop powered) connected to pressure or temperature transmitters in harsh EMI environments. IC Role / Device Role / Timing Role: First-line transient suppressor on signal line before precision ADC front-end and isolation amplifier. Use Value: Sub-1 µA leakage prevents error in µA-level loop current measurement; 120 pF capacitance avoids filtering of 1 kHz sensor bandwidth. |
Use Scenario: PV array input stage of solar charge controller handling lightning-induced surges on ungrounded 60–100 V DC strings. IC Role / Device Role / Timing Role: Secondary protection stage after MOV-based primary clamp, providing precise low-voltage clamping for MOSFET gate drivers. Use Value: 17.0 V VC limits gate-source voltage of N-channel high-side switches (e.g., CSD18540Q5B) during surge events, preventing unintended turn-on. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ10A (ON Semiconductor) | Identical VRWM (10 V), VBR (11.1–12.3 V), VC (17.0 V @ 13.9 A); same DO-214AA package; ±5% VBR tolerance vs. SMBJ10CA's ±5%. | No functional difference; validated for identical IEC 61000-4-5 Level 4 surge profiles and thermal cycling. | Select based on distributor availability and traceability requirements; both meet AEC-Q200 Grade 2 for automotive use. |
| P6SMB10A (Vishay) | Same VRWM and VBR range; slightly higher VC (17.5 V @ 13.9 A); identical 600 W PPK rating; DO-214AA footprint. | 17.5 V clamping increases risk of exceeding 15 V absolute max ratings on some 12 V logic ICs; requires verification against specific downstream BOM. | Prefer SMBJ10CA where clamping margin is critical; P6SMB10A acceptable if downstream ICs tolerate ≥17.5 V transient exposure. |
Compared with SMBJ10CA, SMBJ10A offers identical electrical and mechanical specifications with alternate sourcing, while P6SMB10A trades 0.5 V higher clamping for broader global inventory-making SMBJ10CA optimal for designs prioritizing tight voltage margins and thermal stability.
Availability
SMBJ10CA is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and renewable energy systems requiring stable component supply, long-term lifecycle support, and AEC-Q200-compliant surge protection.
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
Littelfuse is a global leader in circuit protection, specializing in fuses, TVS diodes, varistors, and gas discharge tubes for industrial, automotive, and consumer applications.
The SMBJ series was developed to deliver high-power, low-clamping unidirectional TVS protection in compact SMC packages for 12–48 V DC systems-targeting reliability-critical applications where failure modes must be tightly bounded.
FAQ
What is the maximum clamping voltage of SMBJ10CA under IEC 61000-4-5 surge conditions?
The SMBJ10CA exhibits a maximum clamping voltage of 17.0 V when subjected to a 13.9 A peak pulse current with an 8/20 µs waveform, per IEC 61000-4-5. This value is measured at 25 °C and remains within ±5% across its full operating temperature range (–65 °C to +150 °C), ensuring consistent protection in extreme environments. The SMBJ10CA's clamping performance is validated in Littelfuse's official datasheet Rev. G.
Is SMBJ10CA suitable for bidirectional signal line protection?
No, SMBJ10CA is a unidirectional TVS diode and must not be used on AC-coupled or floating signal lines requiring symmetrical clamping. Its design assumes cathode connects to the protected line and anode to ground. For bidirectional protection-such as RS-485, CAN, or USB D+/D– lines-a dedicated bidirectional variant like SMBJ10CA's counterpart SMBJ10C is required. Using SMBJ10CA in bidirectional configurations risks forward conduction and permanent damage.
How does SMBJ10CA compare to multilayer varistors (MLVs) in 24 V power rail protection?
SMBJ10CA offers faster response time (<1 ps vs. ~1 ns for MLVs), lower clamping voltage (17.0 V vs. typically 22–25 V), and superior temperature stability-clamping rises only ~0.1 V/°C versus ~0.3 V/°C for MLVs. However, MLVs provide inherently bidirectional protection and higher total energy absorption per joule. SMBJ10CA is preferred where precise voltage limiting and speed are critical, such as protecting sensitive DC-DC controllers downstream of 24 V inputs.
Can SMBJ10CA be used in parallel to increase surge current handling?
Parallel operation of SMBJ10CA devices is not recommended due to mismatch in dynamic resistance and avalanche onset voltage, which causes uneven current sharing and potential thermal runaway. Littelfuse specifies single-device operation only. To achieve >13.9 A surge capability, select a higher-rated part (e.g., 1.5KE10A) or implement staged protection with upstream MOVs and downstream low-capacitance TVS arrays-not parallel SMBJ10CA units.
Does SMBJ10CA comply with AEC-Q200 for automotive applications?
Yes, SMBJ10CA is qualified to AEC-Q200 Grade 2 (–40 °C to +105 °C operating temperature) and meets all stress test requirements including temperature cycling, humidity bias, and surge endurance. Its DO-214AA package and silicon construction are validated for under-hood and body electronics use. Full qualification data is documented in Littelfuse's AEC-Q200 test report for SMBJ10CA, confirming suitability for automotive BCM, lighting, and infotainment power rails.
SMBJ10CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 10V
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
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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