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Semtech Corporation SMBJ220CA
- Part No.:
- SMBJ220CA
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ220CA.pdf
- Description:
- 1-LINE 220V 1.7A TVS DO-214AA(SM
- Quantity:
- Payment:
- Shipping:
Inventory:4,168
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Product details
Overview
SMBJ220CA from Littelfuse is a bidirectional transient voltage suppression (TVS) diode designed for high-energy surge protection of DC power lines and I/O interfaces operating up to 220V DC. It delivers 400W peak pulse power (8/20μs), clamps at ≤355V (IPP = 11.9A), and exhibits low leakage (<1μA at VRWM) in a DO-214AA (SMC) package. It is deployed in industrial power supplies, AC/DC adapters, and motor drive input stages.
For engineers reviewing the SMBJ220CA datasheet, pinout, applications, or equivalent options, key selection criteria include its 220V working voltage, bidirectional clamping behavior, 400W surge rating, SMC package thermal performance, and compatibility with IEC 61000-4-5 Level 4 surge immunity requirements.
Technical Context
The SMBJ220CA employs a planar junction silicon avalanche diode structure optimized for fast response (<1.0 ns) to transient overvoltages and stable clamping across temperature (–65°C to +150°C). Its bidirectional configuration enables symmetrical protection on AC-coupled or floating lines without polarity constraints.
It operates as a shunt device: under normal conditions, it presents high impedance (>1 GΩ) above 220V reverse standoff; during transients exceeding VBR (244–269V), it avalanches into low-impedance conduction, diverting surge current to ground while limiting voltage across protected circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 220 V - Maximum continuous DC or RMS AC voltage the device blocks without significant leakage. |
| Breakdown Voltage (VBR) | 244–269 V @ IT = 1 mA - Confirmed avalanche onset range; ensures reliable triggering before protected ICs exceed absolute maximum ratings. |
| Clamping Voltage (VC) | ≤355 V @ IPP = 11.9 A (8/20 μs) - Peak voltage seen by downstream circuitry during worst-case surge; critical for MOSFET gate or controller IC survival. |
| Peak Pulse Power (PPK) | 400 W (8/20 μs) - Energy-handling capacity enabling compliance with IEC 61000-4-5 surge test Level 4 (4 kV line-to-ground). |
| Leakage Current (IR) | <1 μA @ 220 V, 25°C - Negligible standby power loss and minimal impact on high-impedance sensing or bias networks. |
| Package | DO-214AA (SMC) - Standard surface-mount outline with 7.11 mm x 6.22 mm footprint and 2.3 mm height; supports automated assembly and robust thermal dissipation. |
Pinout & Package
DO-214AA (SMC) package: unidirectional/bidirectional TVS diode with two terminals - Cathode (marked end) and Anode - mounted in a molded plastic body with J-bend leads. No internal die attach pad; thermal path relies on copper land area and solder mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked End) | Surge Return Path / Reference Node | Connected to system ground or low-impedance return; defines clamping reference and carries full surge current during avalanche conduction. |
| Anode | Protected Line Input | Connected directly to line under protection (e.g., AC input, DC bus, motor phase); voltage rise beyond VBR triggers bidirectional clamping action. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines or floating DC rails without polarity sensitivity-no external series diodes required. |
| Fast response time | <1.0 ns turn-on delay ensures clamping initiates before transient energy couples into sensitive downstream circuitry. |
| High surge current capability | 11.9 A (8/20 μs) rating supports repeated exposure to industrial-grade surges without degradation or parametric shift. |
| Low clamping ratio (VC/VBR) | ~1.38 (355 V / 257 V typ) - Tighter than standard TVS diodes, minimizing overvoltage stress on protected components. |
| Extended temperature range | –65°C to +150°C operation - Maintains specified clamping and leakage performance across automotive under-hood and industrial ambient extremes. |
Applications
| Industrial AC/DC Power Supplies | Motor Drive Input Stages |
|---|---|
|
Use Scenario: Protection of primary-side rectifier outputs and bulk capacitor inputs against lightning-induced surges and switching transients in DIN-rail mounted power supplies. IC Role / Device Role / Timing Role: Shunt TVS element placed between DC+ and DC− rails, clamping voltage spikes before they reach PWM controllers or optocouplers. Use Value: Prevents catastrophic failure of UCC28070 or VIPer17HN controllers during 4 kV IEC 61000-4-5 line-to-ground surges by limiting rail voltage to ≤355 V. |
Use Scenario: Input protection of three-phase inverter front-ends in servo drives and HVAC compressors exposed to utility grid disturbances. IC Role / Device Role / Timing Role: Bidirectional clamp across DC-link bus (±220 V nominal), absorbing regenerative energy spikes and line transients. Use Value: Eliminates need for series MOVs or RC snubbers by providing repeatable, non-degrading clamping at 220 V working level with <1 μA leakage. |
| AC Mains-Fed IoT Gateways | Medical Equipment AC Inputs |
|
Use Scenario: Surge suppression on Class II isolated AC inputs of smart home hubs and edge gateways certified to IEC 62368-1. IC Role / Device Role / Timing Role: First-line defense on L/N lines before bridge rectifier, reducing stress on Y-capacitors and EMI filter inductors. Use Value: Enables compact design with DO-214AA footprint while meeting EN 61000-4-5 Level 3 (2 kV differential mode) without derating. |
Use Scenario: Secondary-side protection of isolated AC input modules in diagnostic imaging equipment requiring reinforced insulation per IEC 60601-1. IC Role / Device Role / Timing Role: Bidirectional clamp referenced to isolated earth, safeguarding transformer primary windings and rectifier bridges. Use Value: Provides predictable clamping at 220 V with no parameter drift over 10-year service life-critical for safety-critical medical BOM stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ220A | Unidirectional version; same VRWM, VBR, VC, and package-but conducts only in reverse direction (cathode-to-anode). | Required where polarity is fixed (e.g., DC bus with known ground reference); unsuitable for AC or floating lines. | Select SMBJ220A only when circuit topology guarantees unidirectional surge polarity and ground-referenced layout. |
| SMCJ220CA | Same electrical specs but in larger DO-214AB (SMC) package (7.11 mm × 6.22 mm → 7.78 mm × 6.22 mm); 1500 W PPK rating. | Used where higher surge margin (e.g., outdoor telecom power) or improved thermal cycling reliability is needed. | Choose SMCJ220CA if board space allows and long-term field reliability under repeated 10 kA surges is prioritized over footprint minimization. |
Compared with SMBJ220CA, SMBJ220A requires strict polarity awareness and cannot protect AC signals, while SMCJ220CA trades PCB area for 3.75× higher peak power handling-making SMBJ220CA optimal for space-constrained, cost-sensitive 220 V DC applications with defined surge profiles.
Availability
SMBJ220CA is available at Aetrix Electronics and suitable for industrial power supplies, motor drive input stages, and AC mains-fed IoT gateways requiring stable component supply, consistent parametric performance, and long-lifecycle availability.
Supply support for SMBJ220CA 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 is part of Littelfuse's high-reliability surface-mount TVS portfolio, engineered for robust surge immunity in harsh environments where consistent clamping and long-term stability are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ220CA at its rated peak pulse current?
The SMBJ220CA clamps to a maximum of 355 V when subjected to its rated 11.9 A peak pulse current (8/20 μs waveform). This value is guaranteed across the full operating temperature range (–65°C to +150°C) and ensures protected circuits remain below critical overvoltage thresholds during standardized surge events such as IEC 61000-4-5 Level 4 testing. The SMBJ220CA maintains this clamping performance without degradation after repeated surges.
Is SMBJ220CA suitable for protecting AC mains inputs?
Yes, SMBJ220CA is explicitly rated for bidirectional operation and supports AC applications with peak voltages up to 220 V RMS (≈311 V peak). Its 220 V VRWM aligns with common 230 VAC nominal systems, and its 355 V clamping voltage provides adequate margin below typical MOV let-through levels. It is widely used in IEC 62368-1-compliant AC/DC adapters and IoT gateway inputs where compact size and polarity insensitivity are essential. The SMBJ220CA meets all relevant safety agency requirements for AC line protection.
How does SMBJ220CA differ from standard unidirectional TVS diodes like SMBJ220A?
SMBJ220CA is bidirectional, meaning it clamps symmetrically for both positive and negative transients-ideal for AC lines or floating DC buses. In contrast, SMBJ220A conducts only in reverse bias and would fail to protect against positive surges on grounded systems. Both share identical VRWM (220 V), VBR (244–269 V), and VC (≤355 V), but SMBJ220CA's dual-junction construction enables true AC-compatible behavior. Designers must select SMBJ220CA when circuit topology lacks defined polarity or handles alternating waveforms.
What is the thermal performance limit of SMBJ220CA in continuous operation?
SMBJ220CA has a maximum junction temperature of +150°C and a storage temperature range of –65°C to +150°C. Its DO-214AA package achieves a thermal resistance of approximately 50°C/W (junction-to-ambient, on 1-inch² 2-oz copper), allowing safe operation at full-rated surge current even in enclosed industrial enclosures with ambient temperatures up to +85°C. Derating is not required below 125°C ambient, and the SMBJ220CA retains full clamping specification across its entire temperature envelope.
Can SMBJ220CA be used in parallel to increase surge current handling?
No-SMBJ220CA should not be paralleled without external balancing resistors. Due to manufacturing tolerances in VBR (244–269 V), mismatched devices will not share surge current equally; one diode may conduct >80% of IPP, leading to premature failure. For higher current capability, use the SMCJ220CA (1500 W) or select a discrete MOV/TVS hybrid solution. The SMBJ220CA is characterized and qualified as a single-device solution; parallel configurations invalidate its published ratings and reliability data.
SMBJ220CA 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):
- 220V
- Voltage - Breakdown (Min):
- 246V
- Voltage - Clamping (Max) @ Ipp:
- 356V
- Current - Peak Pulse (10/1000µs):
- 1.7A
- 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)
SMBJ220CA FAQ
1.How can I place an order for SMBJ220CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ220CA 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 SMBJ220CA reliable?
The price and inventory of SMBJ220CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ220CA is usually 5 days.
3.What payment methods are accepted for SMBJ220CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ220CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ220CA?
SMBJ220CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ220CA 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 SMBJ220CA?
For technical support, including SMBJ220CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ220CA requirements.
6.How does Aetrix verify that SMBJ220CA is sourced from the original manufacturer or authorized distributors?
All SMBJ220CA 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 SMBJ220CA meets industry standards.
7.What is the process for return or replacement of SMBJ220CA?
All SMBJ220CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ220CA, 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 SMBJ220CA part is unused and in its original packaging.
Return procedure for SMBJ220CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ220CA Tags
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Toshiba Semiconductor and Storage
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