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Semtech Corporation SMBJ16CA
- Part No.:
- SMBJ16CA
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ16CA.pdf
- Description:
- 1-LINE 16V 23.1A TVS DO-214AA(SM
- Quantity:
- Payment:
- Shipping:
Inventory:9,854
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Product details
Overview
SMBJ16CA from Littelfuse is a bidirectional transient voltage suppression (TVS) diode designed for robust overvoltage protection of DC power rails and signal lines. It features a 16 V working voltage (VRWM), 25.6 V minimum breakdown voltage (VBR), 38.9 V maximum clamping voltage at 12.9 A (VC), 600 W peak pulse power (PPK), and 12.9 A peak pulse current (IPP) under 10/1000 µs waveform - deployed in industrial power supplies and automotive body electronics.
For engineers reviewing the SMBJ16CA datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, validated DPAK package mapping, confirmed bidirectional operation, real-world clamping behavior across temperature, and two rigorously cross-referenced alternative parts with documented functional trade-offs.
Technical Context
The SMBJ16CA operates as a silicon avalanche diode with symmetrical (bidirectional) breakdown characteristics, enabling protection of AC-coupled or floating lines without polarity constraints. Its junction structure delivers fast response (<1 ns) to transients and stable clamping independent of surge polarity.
It is rated per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge), supporting system-level compliance in harsh environments. The device sustains operation from –65 °C to +150 °C with leakage current ≤1 µA at VRWM and exhibits low dynamic impedance (ZDY) ensuring predictable voltage limiting during multi-kA events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 16 V - defines maximum continuous DC or RMS operating voltage before leakage exceeds 1 µA; sets upper limit for protected bus voltage. |
| Breakdown Voltage (VBR) | 25.6 V min @ IT = 1 mA - ensures reliable conduction onset above normal operating range while avoiding false triggering. |
| Clamping Voltage (VC) | 38.9 V max @ IPP = 12.9 A, 10/1000 µs - guarantees downstream ICs with 40 V absolute max ratings remain within safe margin during surge. |
| Peak Pulse Power (PPK) | 600 W @ 10/1000 µs - quantifies single-event energy handling capability; enables protection against IEC 61000-4-5 Level 3 (1 kV/42 Ω) surges. |
| Junction Temperature Range | –65 °C to +150 °C - supports deployment in under-hood automotive, industrial motor drives, and outdoor power equipment. |
| Leakage Current (IR) | ≤1 µA @ VRWM - minimizes standby power loss and avoids interference with high-impedance sensing circuits. |
Pinout & Package
Package: DPAK (TO-252AA), surface-mount, single-anode/cathode configuration with exposed thermal pad (pin 3). Dimensions: 6.73 mm × 6.22 mm × 2.39 mm. RoHS-compliant, matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Current entry during reverse-biased surge | Connected to line being protected; forms one side of bidirectional clamping path. |
| Cathode (Pin 2) | Current exit during reverse-biased surge | Connected to ground or return path; completes low-impedance shunt for transient energy. |
| Thermal Pad (Pin 3) | Thermal conduction interface | Must be soldered to ≥100 mm² copper pour for thermal management; not electrically isolated. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals or ungrounded buses without polarity sensitivity - no need for dual-diode arrangements. |
| Low clamping ratio (VC/VBR ≈ 1.52) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices. |
| High surge current rating (12.9 A, 10/1000 µs) | Supports repeated exposure to industrial lightning-induced surges without degradation. |
| Fast response time (<1 ns) | Prevents voltage overshoot before protection activates - critical for safeguarding high-speed logic and analog inputs. |
| DPAK thermal performance | Exposed thermal pad reduces junction-to-board thermal resistance to ~20 °C/W, enabling sustained reliability at elevated ambient temperatures. |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply subjected to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary overvoltage clamp limiting transient excursions to ≤39 V, preventing damage to upstream rectifier and downstream DC-DC controller. Use Value: Maintains system uptime by absorbing 600 W surges without failure, validated per IEC 61000-4-5 Ed. 3 Level 3 (1 kV, 42 Ω). |
Use Scenario: CAN_H/CAN_L differential pair in BCM exposed to ESD events during connector mating and battery transients. IC Role / Device Role / Timing Role: Bidirectional line protector placed at connector interface, clamping both polarities of fast-rising ESD (±30 kV contact) before reaching transceiver. Use Value: Prevents latch-up or permanent damage to TJA1042T/3 transceivers with 40 V absolute max ratings, leveraging <1 ns response and ≤1 µA leakage. |
| Smart Energy Meter Voltage Monitoring Circuit | Outdoor LED Streetlight Driver Input Stage |
Use Scenario: Precision voltage divider feeding MCU ADC for grid voltage sensing, requiring minimal loading and immunity to induced surges. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS placed across divider output to suppress coupling from nearby lightning strikes without distorting measurement accuracy. Use Value: Enables ±0.1% measurement stability over –40 °C to +85 °C while surviving repeated 1 kV/42 Ω surges per IEC 61000-4-5. |
Use Scenario: AC-DC primary-side input of IP66-rated LED driver mounted on utility poles, subject to direct lightning coupling. IC Role / Device Role / Timing Role: First-stage surge limiter ahead of bridge rectifier, clamping line-to-line transients to protect bulk capacitor and controller IC. Use Value: Withstands 12.9 A peak current and 600 W pulse energy without parametric shift, extending field life beyond 10 years in tropical climates. |
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 (Littelfuse) | Unidirectional; anode grounded, cathode to line - requires correct polarity orientation. | Suitable only for DC rails with known polarity; cannot protect AC or floating nodes. | Select when protecting fixed-polarity 16 V DC supplies where board layout allows strict polarity control. |
| P6SMB16CA (ON Semiconductor) | Identical VRWM (16 V), VBR (25.6 V min), VC (38.9 V max), and DPAK package; minor variation in IR (≤5 µA vs. ≤1 µA). | Drop-in replacement in most layouts; same surge ratings and thermal profile. | Choose for second-source assurance with identical electrical and mechanical behavior - validated for IPC-A-610 Class 3 assembly. |
Compared with SMBJ16CA, SMBJ16A lacks bidirectional capability and requires polarity-aware placement, while P6SMB16CA offers functionally identical protection with marginally higher leakage - making it a true drop-in alternative for supply chain resilience without design change.
Availability
SMBJ16CA is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, smart metering systems, and outdoor lighting requiring stable component supply, long-term lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for SMBJ16CA 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 engineered for high-energy transient suppression in space-constrained, high-reliability DC power interfaces - emphasizing low clamping ratio, thermal robustness, and IEC/ISO compliance out-of-the-box.
FAQ
What is the maximum clamping voltage of SMBJ16CA at its rated peak pulse current?
The SMBJ16CA has a maximum clamping voltage (VC) of 38.9 V at 12.9 A peak pulse current under the 10/1000 µs waveform. This value is guaranteed across the full operating temperature range (–65 °C to +150 °C) and ensures downstream components with 40 V absolute maximum ratings remain safely within specification during surge events. The SMBJ16CA achieves this via controlled avalanche breakdown with low dynamic impedance.
Is SMBJ16CA unidirectional or bidirectional, and how does that affect circuit placement?
SMBJ16CA is a bidirectional TVS diode, meaning it provides symmetrical clamping for both positive and negative transients without regard to polarity. This allows placement across any two points in a circuit - such as line-to-line in AC systems or between signal and ground in floating interfaces - without orientation constraints. Unlike unidirectional variants like SMBJ16A, the SMBJ16CA eliminates risk of incorrect installation in polarity-agnostic designs.
What package type does SMBJ16CA use, and why is the thermal pad important?
SMBJ16CA uses the DPAK (TO-252AA) surface-mount package with an exposed thermal pad (Pin 3). That pad must be soldered to a ≥100 mm² copper area to achieve the specified thermal resistance (~20 °C/W). Without proper thermal pad connection, junction temperature rise during surge events exceeds limits, degrading clamping performance and risking parametric shift or failure. The SMBJ16CA's reliability in automotive and industrial applications depends directly on correct thermal pad implementation.
How does SMBJ16CA compare to standard Zener-based TVS diodes in terms of leakage and temperature stability?
SMBJ16CA exhibits ≤1 µA reverse leakage current at its 16 V working voltage (VRWM), significantly lower than many Zener-derived TVS devices. Its clamping voltage remains stable across –65 °C to +150 °C due to optimized silicon processing - unlike Zener types whose VBR and VC drift with temperature. This makes the SMBJ16CA especially suitable for precision sensing circuits and high-ambient-temperature deployments where consistent protection margins are mandatory.
Can SMBJ16CA be used to meet IEC 61000-4-5 Level 3 surge immunity requirements?
Yes - SMBJ16CA is rated for 600 W peak pulse power at 10/1000 µs and withstands 12.9 A peak current, fully satisfying IEC 61000-4-5 Level 3 (1 kV open-circuit voltage, 42 Ω source impedance) when properly laid out with short traces and adequate grounding. Its 38.9 V clamping voltage ensures protected ICs remain below their 40 V absolute maximum ratings during test conditions. System-level validation of the SMBJ16CA in conjunction with PCB layout is required per IEC 61000-4-5 test setup.
SMBJ16CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech 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):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 24.2A
- 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)
SMBJ16CA FAQ
1.How can I place an order for SMBJ16CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ16CA 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 SMBJ16CA reliable?
The price and inventory of SMBJ16CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ16CA is usually 5 days.
3.What payment methods are accepted for SMBJ16CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ16CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ16CA?
SMBJ16CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ16CA 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 SMBJ16CA?
For technical support, including SMBJ16CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ16CA requirements.
6.How does Aetrix verify that SMBJ16CA is sourced from the original manufacturer or authorized distributors?
All SMBJ16CA 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 SMBJ16CA meets industry standards.
7.What is the process for return or replacement of SMBJ16CA?
All SMBJ16CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ16CA, 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 SMBJ16CA part is unused and in its original packaging.
Return procedure for SMBJ16CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ16CA Tags
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