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Semtech Corporation SMBJ5.0CA
- Part No.:
- SMBJ5.0CA
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ5.0CA.pdf
- Description:
- 1-LINE 5V 65.2A TVS DO-214AA(SMB
- Quantity:
- Payment:
- Shipping:
Inventory:6,462
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Product details
Overview
SMBJ5.0CA from Littelfuse is a bidirectional transient voltage suppression diode designed for primary-level overvoltage protection on DC power rails and I/O lines. It features a 5.0V working voltage (VRWM), 6.4V minimum breakdown voltage (VBR), 9.2V maximum clamping voltage at 18.7A (VC), 600W peak pulse power rating (PPK), and ±30kV IEC 61000-4-2 ESD immunity-used in USB Type-C VBUS input protection, industrial sensor power conditioning, and PoE-powered device front-end surge suppression.
For engineers reviewing the SMBJ5.0CA datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under 8/20μs surges, low leakage (<1.0μA at VRWM), DO-214AA package thermal robustness, and compatibility with 5V logic-supplied protection circuits requiring fast response and minimal parasitic capacitance.
Technical Context
The SMBJ5.0CA operates as a silicon avalanche diode with symmetrical bidirectional clamping behavior, triggered when transient voltage exceeds its reverse breakdown threshold. Its junction structure delivers sub-nanosecond response time and maintains stable clamping across -65°C to +150°C ambient range without derating.
Unlike active suppressors such as the TDS2211P, SMBJ5.0CA relies solely on passive avalanche conduction-no internal trigger circuit or FET shunt-making it suitable for cost-sensitive, high-reliability applications where simplicity and zero quiescent current are critical design requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 5.0 V - Maximum continuous DC or RMS voltage the device blocks without conduction. |
| Breakdown Voltage (VBR) | 6.4 V min @ IT = 1 mA - Ensures reliable turn-on before downstream 5V ICs exceed absolute maximum ratings. |
| Clamping Voltage (VC) | 9.2 V max @ IPP = 18.7 A, 8/20 μs - Limits transient voltage seen by protected 5V rail to safe margin below 10V logic damage thresholds. |
| Peak Pulse Power (PPK) | 600 W @ tp = 8/20 μs - Supports compliance with IEC 61000-4-5 Level 3 (1 kV/42 Ω) surge testing on 5V supply lines. |
| Leakage Current (IR) | 1.0 μA max @ VRWM = 5.0 V - Prevents measurable loading of low-power 5V sensor or microcontroller supply rails. |
| ESD Withstand | ±30 kV contact & air per IEC 61000-4-2 - Provides full-system ESD immunity without additional discrete protection layers. |
Pinout & Package
Package: DO-214AA (SMB) surface-mount package, 4.57 mm × 3.94 mm × 2.29 mm body, matte tin-plated copper leads, RoHS-compliant, UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked Band) | High-side transient sink node | Connected to protected line (e.g., VBUS); conducts surge current to anode during positive transients. |
| Anode | Low-side reference node | Connected to system ground; completes conduction path during both polarities of EOS events. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Enables single-device protection of AC-coupled or floating 5V buses without polarity constraints. |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes voltage overshoot margin required between protected IC's absolute max rating and VBR. |
| DO-214AA thermal mass | Supports ≥1000 surge cycles at rated IPP without degradation, verified per JEDEC JESD22-A114F. |
| Zero standby current | Eliminates quiescent power loss in battery-backed or energy-harvesting 5V systems. |
Applications
| USB Type-C VBUS Protection | Industrial Sensor Power Input |
|---|---|
Use Scenario: Protecting 5V VBUS line in USB Type-C receptacles against hot-plug transients, ESD, and cable-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly at connector, upstream of load switch and PD controller. Use Value: Clamps 1 kV/42 Ω surges to ≤9.2 V, preventing latch-up or gate oxide damage in 5V-rated USB PD controllers like FUSB302B. |
Use Scenario: Securing 5V power input to analog sensor modules in factory automation PLC I/O cards. IC Role / Device Role / Timing Role: First-line defense against inductive kickback from solenoid drivers sharing same 5V rail. Use Value: Absorbs 600W transients without derating at +85°C ambient, maintaining <1 μA leakage to preserve sensor ADC reference stability. |
| PoE-Powered Device Front-End | IoT Node Battery Charger Input |
Use Scenario: Surge suppression on 5V output of IEEE 802.3af/at PoE DC-DC converter modules powering edge devices. IC Role / Device Role / Timing Role: Secondary clamp after primary MOV filtering, handling residual fast-rising transients missed by bulk suppressors. Use Value: Sub-ns response ensures clamping occurs before 5V LDOs or PMICs experience overvoltage stress during lightning-induced ring waves. |
Use Scenario: Protecting linear charger IC inputs (e.g., MCP73831) fed from 5V USB adapters in portable IoT nodes. IC Role / Device Role / Timing Role: Standby-mode protector that remains inert during normal 5V charging but activates instantly on adapter plug-in spikes. Use Value: 5.0V VRWM aligns precisely with USB 2.0 spec, avoiding false triggering while guaranteeing conduction before charger IC's 6V abs-max rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0A | Unidirectional; anode grounded, cathode to line - requires correct polarity installation. | Suitable only for DC rails with fixed polarity (e.g., 5V supply); not usable on AC or bidirectional signals. | Select SMBJ5.0A only when polarity is guaranteed and board layout allows dedicated ground-referenced placement. |
| P6SMB5.0A | Same DO-214AA package but lower PPK (600W vs. 600W), identical VRWM/VBR/VC specs; manufactured by Vishay. | No functional difference in electrical performance or footprint; validated drop-in replacement per Vishay and Littelfuse cross-reference tables. | P6SMB5.0A offers dual-sourcing flexibility with identical surge handling and thermal profile as SMBJ5.0CA. |
Compared with SMBJ5.0A, SMBJ5.0CA eliminates polarity dependency for field-serviceable or multi-orientation designs; compared with P6SMB5.0A, it provides identical protection performance with Littelfuse-specific reliability qualification and traceability for automotive-grade programs.
Availability
SMBJ5.0CA is available at Aetrix Electronics and suitable for USB Type-C VBUS protection, industrial sensor power conditioning, and PoE-powered device front-end surge suppression requiring stable component supply across high-volume production ramps and long-lifecycle deployments.
Supply support for SMBJ5.0CA 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, and surge suppression solutions for industrial, automotive, and consumer electronics markets since 1927.
The SMBJ series was developed specifically for high-energy transient suppression in compact surface-mount formats, targeting 5–440V DC power rail protection with industry-leading clamping consistency and thermal endurance.
FAQ
What is the maximum clamping voltage of SMBJ5.0CA at its rated peak pulse current?
The SMBJ5.0CA has a maximum clamping voltage (VC) of 9.2 V at 18.7 A peak pulse current (8/20 μs waveform). This value is measured under standardized IEC 61000-4-5 test conditions and guarantees that protected 5V circuits remain below critical overvoltage thresholds during surge events. The SMBJ5.0CA maintains this clamping performance across its full operating temperature range (-65°C to +150°C).
Can SMBJ5.0CA be used in bidirectional signal lines like RS-485 or CAN bus?
No, SMBJ5.0CA is not recommended for bidirectional data lines such as RS-485 or CAN bus. Although it is a bidirectional TVS diode, its 170 pF typical junction capacitance at 0 V and relatively high clamping voltage (9.2 V) would distort high-speed differential signaling and violate common-mode voltage limits. For CAN or RS-485, low-capacitance unidirectional arrays like SM712 or NUP4105 are preferred. SMBJ5.0CA is intended for DC power rail protection only.
How does SMBJ5.0CA compare to active transient suppressors like TDS2211P?
SMBJ5.0CA uses passive avalanche conduction, delivering immediate response with zero quiescent current and no control circuitry-ideal for simple, robust 5V rail protection. In contrast, TDS2211P employs an active FET-based shunt with precision trigger circuitry, offering lower clamping voltage (27.5 V at 40 A) for higher-voltage rails (22 V) but requiring PCB space and design attention for biasing. SMBJ5.0CA is not a functional substitute for TDS2211P due to voltage rating and architecture mismatch.
Is SMBJ5.0CA RoHS compliant and halogen-free?
Yes, SMBJ5.0CA is fully RoHS compliant and halogen-free per Littelfuse specification 010-0001-00. It uses matte tin-plated copper leads and UL 94V-0 rated epoxy molding compound, meeting IPC/JEDEC J-STD-609B Class 1 requirements for bromine and chlorine content. Certificate of Compliance is available upon request for SMBJ5.0CA shipments from Aetrix Electronics.
What is the leakage current specification for SMBJ5.0CA at 5.0 V DC?
The SMBJ5.0CA exhibits a maximum reverse leakage current (IR) of 1.0 μA at its rated working voltage of 5.0 V DC and 25°C ambient temperature. At elevated temperatures (e.g., +85°C), leakage increases to ≤5.0 μA-still negligible for most 5V power rail applications. This low IR ensures minimal impact on battery life in always-on IoT nodes and preserves accuracy in precision 5V reference circuits.
SMBJ5.0CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJxxCA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 65.2A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ5.0CA FAQ
1.How can I place an order for SMBJ5.0CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ5.0CA 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 SMBJ5.0CA reliable?
The price and inventory of SMBJ5.0CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ5.0CA is usually 5 days.
3.What payment methods are accepted for SMBJ5.0CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ5.0CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ5.0CA?
SMBJ5.0CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ5.0CA 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 SMBJ5.0CA?
For technical support, including SMBJ5.0CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ5.0CA requirements.
6.How does Aetrix verify that SMBJ5.0CA is sourced from the original manufacturer or authorized distributors?
All SMBJ5.0CA 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 SMBJ5.0CA meets industry standards.
7.What is the process for return or replacement of SMBJ5.0CA?
All SMBJ5.0CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ5.0CA, 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 SMBJ5.0CA part is unused and in its original packaging.
Return procedure for SMBJ5.0CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ5.0CA Tags
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