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Semtech Corporation SMBJ43CA
- Part No.:
- SMBJ43CA
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ43CA.pdf
- Description:
- 1-LINE 43V 8.6A TVS DO-214AA(SMB
- Quantity:
- Payment:
- Shipping:
Inventory:4,369
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Product details
Overview
TDS2211P from Semtech is a transient diverting suppressor designed to protect 22V-rated I/O or power lines against EOS, ESD, and surge events using a shunt FET architecture; it delivers 40A peak pulse current (8/20μs), clamps at 27.5–28V up to 40A, and maintains stable clamping across –40°C to +125°C - deployed in USB Type-C PD bus protection.
For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, DFN-6 pin mapping, real-world use cases in load switch input protection and USB PD interfaces, and validated alternative parts with documented functional trade-offs.
Technical Context
The TDS2211P uses a precision-triggered surge-rated FET as its primary protection element, activated only during overvoltage transients - unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) across 24A–40A IPP due to decreasing RDS(on) under surge conditions.
It features a 6-pin DFN (1.6 × 1.6 × 0.55 mm) with three parallel IN terminals (pins 4–6) and three parallel GND terminals (pins 1–3), enabling low-inductance, high-current path design; dynamic resistance is 20 mΩ (8/20μs), and junction capacitance is 175 pF at 22V/1MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22 V - matches nominal USB PD bus voltage and defines maximum continuous operating voltage before triggering. |
| Clamping Voltage | 27.5–28 V at 40A (8/20μs + 1.2/50μs combo wave) - stays within safe margin below typical 30V+ damage thresholds of USB PD controllers. |
| Peak Pulse Current | 40 A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness standards without external staging. |
| Junction Capacitance | 175 pF at 22V/1 MHz - low enough for DC power rail protection without degrading transient response or causing signal integrity issues. |
| Dynamic Resistance | 20 mΩ (8/20μs, 1A–40A range) - enables flat clamping curve and minimizes voltage overshoot during fast-rising surges. |
Pinout & Package
Package: DFN-6 (1.6 mm × 1.6 mm × 0.55 mm), RoHS-compliant, UL 94V-0 molding compound, lead-free finish, tape-and-reel packaging (3,000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Parallel ground return paths - all three must be connected to minimize inductance and maximize surge current handling capability. |
| Pins 4, 5, 6 | IN | Parallel input terminals for protected line - all three required to distribute surge current and reduce trace impedance to protected bus. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5 V across full 24–40A IPP range - eliminates need for derating at high temperature or high current. |
| FET-based shunt protection | Surge energy dissipated in low-RDS(on) channel instead of PN-junction - avoids thermal runaway and enables higher reliability than TVS diodes. |
| Low dynamic resistance | 20 mΩ ensures minimal IR drop during surge - critical for maintaining tight clamping margin on 22V rails with sensitive downstream ICs. |
| High EFT immunity | ±4 kV per IEC 61000-4-4 (5/50 ns, 5 kHz & 100 kHz bursts) - protects against repetitive switching noise in industrial motor drives and PLCs. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBus lines in USB-C receptacles supporting up to 20V/5A PD negotiation, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Transient diverting suppressor placed between connector and PD controller or load switch, triggered within nanoseconds of overvoltage detection. Use Value: Maintains 27.5–28V clamping across –40°C to +125°C - prevents false trips and ensures consistent protection margin where standard TVS devices exceed 35V at elevated temperatures. |
Use Scenario: Safeguarding input pins of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment. IC Role / Device Role / Timing Role: Primary front-end surge clamp on VIN rail, absorbing 40A transients before they reach internal FET gate oxide or overvoltage protection circuitry. Use Value: Prevents latch-up or permanent damage to load switch ICs by limiting transient voltage to ≤28V - well below typical 30–36V absolute maximum ratings. |
| IoT Device Power Rail Protection | Storage Device DC Power Interface |
Use Scenario: Securing 22V DC input rails in battery-powered edge sensors and gateway modules subject to field ESD and induced surges. IC Role / Device Role / Timing Role: Single-component, low-capacitance (175 pF) suppressor replacing multi-stage TVS + RC networks on compact PCBs. Use Value: Enables board space reduction vs. traditional solutions - DFN-6 footprint (2.56 mm²) saves >60% area compared to SOD-123 or SMA packages with similar ratings. |
Use Scenario: Protecting SATA or NVMe SSD power inputs in enterprise storage enclosures exposed to hot-plug transients and backplane coupling. IC Role / Device Role / Timing Role: Standalone EOS suppressor on +22V auxiliary or main power rail, coordinated with low-capacitance TVS on data lanes. Use Value: Delivers ±30 kV ESD immunity and 40A surge rating while adding only 175 pF loading - avoids resonance or damping issues on regulated 22V supply lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Standard unidirectional TVS diode; clamping rises to ~42V at 40A (8/20μs); 10× higher dynamic resistance (~200 mΩ). | Limited to lower-temperature or lower-IPP designs; unsuitable where clamping stability across temperature is required. | Select when cost sensitivity outweighs clamping precision and thermal performance is secondary. |
| TPD2E007DRYR | Low-capacitance (7 pF) dual-channel ESD protector; rated only for 3A (8/20μs); no surge rating beyond IEC 61000-4-2. | Designed for high-speed data lines (USB 2.0, HDMI), not power rail protection; cannot handle 40A surges. | Use only for signal-line ESD hardening - never as a replacement for TDS2211P on power rails. |
Compared with SMAJ22A and TPD2E007DRYR, the TDS2211P uniquely combines 40A surge capability, sub-28V clamping stability over temperature, and FET-based low-RDS(on) operation - making it the only viable option for 22V industrial power rail protection requiring IEC 61000-4-5 compliance.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT device power rails requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/REACH compliance.
Supply support for TDS2211P 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
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in analog and mixed-signal ICs for precision sensing, protection, and signal integrity.
The TDS product line delivers superior EOS protection using active FET-based clamping - engineered specifically for high-reliability 22V–48V power rail and interface protection in industrial, computing, and USB ecosystem applications.
FAQ
What is the primary protection function of the TDS2211P?
The TDS2211P functions as a transient diverting suppressor that activates a precision-triggered shunt FET during overvoltage events, clamping the protected line at 27.5–28V regardless of peak pulse current up to 40A. Unlike TVS diodes, the TDS2211P achieves this through low-RDS(on) conduction rather than junction breakdown - delivering stable, temperature-invariant protection for 22V systems.
Can the TDS2211P replace a standard TVS diode like SMAJ22A in a 22V application?
The TDS2211P can replace SMAJ22A only if the design requires stable clamping below 28V across –40°C to +125°C and supports 40A surge currents. SMAJ22A clamps above 40V at 40A and degrades significantly with temperature, whereas the TDS2211P maintains ≤28V clamping. Layout changes are required: TDS2211P needs six pins (three IN, three GND) versus SMAJ22A's two leads.
What is the recommended PCB layout for optimal performance of the TDS2211P?
Place the TDS2211P as close as possible to the protected connector. Connect all three IN pins (4–6) via a single short, wide trace to the protected line, and tie all three GND pins (1–3) directly to a solid ground plane using multiple vias. Avoid thermal pads - energy is dissipated in the FET channel, not the die surface. This minimizes parasitic inductance and ensures full 40A surge capability.
Does the TDS2211P meet IEC 61000-4-5 surge immunity standards?
Yes, the TDS2211P is rated for 40A peak pulse current (8/20μs waveform) and withstands ±1kV combination wave (1.2/50μs voltage + 8/20μs current, RS = 42Ω) - satisfying IEC 61000-4-5 Level 4 requirements for 22V systems. Its constant clamping behavior ensures compliance across the full operating temperature range, unlike conventional TVS devices whose clamping voltage increases with ambient temperature.
Is the TDS2211P suitable for protecting USB Type-C CC or SBU lines?
No, the TDS2211P is not suitable for USB Type-C CC or SBU lines. It is designed for 22V power rail protection (e.g., VBus) and has 175 pF capacitance - too high for differential signaling lines requiring sub-1 pF loading. For CC/SBU protection, Semtech recommends uClamp2411ZA (24V, <1 pF), which is optimized for low-capacitance, high-speed data line ESD suppression.
SMBJ43CA 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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 8.63A
- 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)
SMBJ43CA FAQ
1.How can I place an order for SMBJ43CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ43CA 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 SMBJ43CA reliable?
The price and inventory of SMBJ43CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ43CA is usually 5 days.
3.What payment methods are accepted for SMBJ43CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ43CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ43CA?
SMBJ43CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ43CA 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 SMBJ43CA?
For technical support, including SMBJ43CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ43CA requirements.
6.How does Aetrix verify that SMBJ43CA is sourced from the original manufacturer or authorized distributors?
All SMBJ43CA 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 SMBJ43CA meets industry standards.
7.What is the process for return or replacement of SMBJ43CA?
All SMBJ43CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ43CA, 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 SMBJ43CA part is unused and in its original packaging.
Return procedure for SMBJ43CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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