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Semtech Corporation SCDA4F
- Part No.:
- SCDA4F
- Manufacturer:
- Semtech Corporation
- Category:
- Diode Arrays
- Package:
- Module
- Datasheet:
-
SCDA4F.pdf
- Description:
- DIODE ARRAY 400V 3.75A
- Quantity:
- Payment:
- Shipping:
Inventory:6,391
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Product details
Overview
TDS2211P from Semtech is a transient diverting suppressor designed to protect single 22V I/O or power lines against high-energy EOS events, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A (8/20μs) peak pulse current handling, and stable 27.5–28V clamping across full current and temperature range (−40°C to +125°C); it is deployed in USB Type-C PD bus protection where low, temperature-invariant clamping prevents damage to 20V-rated controllers.
For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include its FET-based shunt architecture enabling constant clamping voltage, DFN 1.6×1.6mm 6-lead package footprint, 175pF junction capacitance at 22V, and compatibility with industrial surge standards (±1kV, 1.2/50μs + 8/20μs, RS = 42Ω).
Technical Context
The TDS2211P uses a surge-rated MOSFET as the primary protection element, activated by a precision trigger circuit that senses overvoltage and drives the FET into low-RDS(on) conduction-achieving dynamic resistance of just 20mΩ. Unlike conventional TVS diodes, its clamping voltage remains nearly flat (27.5–28V) from 24A to 40A peak pulse current due to decreasing RDS(on) under surge conditions.
It operates across −40°C to +125°C ambient, with breakdown voltage (25–27.9V) and reverse leakage (130–600nA at 22V) specified at 25°C and characterized over temperature. Its functional architecture separates trigger threshold (≈VBR) from conduction path, decoupling clamping stability from junction heating effects seen in pn-junction TVS devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - Maximum continuous DC operating voltage on protected line without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave, RS = 2Ω) - Ensures downstream 20V USB PD controllers remain below absolute maximum ratings during surge. |
| Peak Pulse Current | 40A (tp = 8/20μs) - Meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD interfaces. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - Provides robust system-level ESD protection without external shielding or layout mitigation. |
| Junction Capacitance | 175pF at VR = 22V, f = 1MHz - Low enough for USB Type-C VBUS line protection without signal integrity impact on DC/low-frequency power rails. |
| Dynamic Resistance | 20mΩ (measured 1–40A, 8/20μs) - Enables near-constant clamping via FET conduction, not voltage-dependent avalanche behavior. |
| Package | DFN 1.6mm × 1.6mm × 0.55mm, 6-lead - Enables high-density placement adjacent to connectors with minimal PCB area (2.56 mm² footprint). |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound. Exposed thermal pad not required; all GND pins must be connected for rated surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three pins must be connected to minimize inductance and achieve full 40A rating. |
| 4, 5, 6 | IN | Protected input node (VBUS or I/O line); parallel connection of all three pins ensures uniform current sharing and optimal ESD/surge response. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Replaces avalanche diode with low-RDS(on) MOSFET, delivering flat clamping voltage independent of surge magnitude or temperature drift. |
| Constant clamping across 24–40A | 27.5–28V variation ≤0.5V - Eliminates design margin uncertainty when sizing protection for worst-case ambient + surge combinations. |
| High-energy surge capability | 1120W peak pulse power (8/20μs) - Supports repeated exposure to industrial lightning surges without parametric shift or failure. |
| Low-temperature coefficient | Clamping stable from −40°C to +125°C - Enables reliable operation in automotive under-hood, industrial PLC, and outdoor IoT deployments. |
| Small-footprint DFN package | 1.6×1.6mm body with 0.55mm height - Reduces board space by >50% vs. comparable SO-8 or SOT-23 TVS solutions while maintaining 6-terminal robustness. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20V nominal VBUS lines in USB-C PD ports against ESD, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector, shunting surge energy to ground before reaching PD controller IC. Use Value: Maintains 27.5–28V clamping at 40A and 125°C-well below 30V absolute max rating of common PD controllers-enabling single-device compliance with IEC 61000-4-2/4-5 without derating. |
Use Scenario: Safeguarding input terminals of load switches (e.g., HS2950P) in remote meters, robotics, and industrial power modules. IC Role / Device Role / Timing Role: Primary front-end EOS protector, limiting voltage across load switch FET's drain-source during surge events. Use Value: Prevents gate oxide damage and latch-up in integrated load switches by clamping <28V regardless of ambient temperature or surge amplitude-extending device lifetime in harsh environments. |
| IoT Edge Node Power Rail Protection | Notebook/Tablet VBUS Line Protection |
|
Use Scenario: Securing 12–22V DC input rails in battery-powered IoT gateways exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Solid-state transient suppressor replacing bulkier TVS arrays, integrated into compact 2-layer PCB designs. Use Value: 175pF capacitance avoids filtering or bandwidth reduction on power rails; 600nA max leakage at 22V preserves battery life in always-on edge nodes. |
Use Scenario: Protecting internal VBUS routing between USB-C port and system power management IC in thin client devices. IC Role / Device Role / Timing Role: Compact, low-profile EOS guard positioned within 3mm of connector per layout guidelines. Use Value: DFN 1.6×1.6mm footprint enables placement in tight bezel areas; stable clamping eliminates need for thermal derating margins in thermally constrained chassis. |
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; 35.1V min clamping at 12.5A (8/20μs), increases to ~42V at 40A; 100pF capacitance. | Limited to lower-energy surges; clamping rises significantly with current and temperature-requires larger safety margin for 20V systems. | Select SMAJ22A only if cost sensitivity outweighs clamping stability needs and surge energy is limited to <20A. |
| TPD2E007DBVR | Low-capacitance (3.5pF) dual-channel ESD protector; rated for 4A (8/20μs), 12kV contact ESD; no industrial surge rating. | Designed for high-speed data lines (USB 2.0, HDMI), not power rail protection; insufficient for 40A surge or ±1kV IEC 61000-4-5. | Use TPD2E007DBVR for DP/DM or CC lines alongside TDS2211P-not as a replacement for VBUS protection. |
Compared with SMAJ22A and TPD2E007DBVR, the TDS2211P uniquely delivers flat 27.5–28V clamping at 40A and 125°C, making it the only option among the three qualified for USB PD VBUS and industrial load switch inputs requiring both high surge current and temperature-stable voltage limiting.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD implementations, industrial load switch protection, and IoT edge node power rail hardening requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
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 family was engineered specifically to overcome clamping voltage drift in traditional TVS diodes, targeting high-reliability power rail and interface protection in USB, industrial, and automotive applications.
FAQ
What is the primary protection mechanism used in the TDS2211P?
The TDS2211P employs a surge-rated MOSFET as its main protection element, activated by an integrated precision trigger circuit. When an overvoltage event exceeds the trigger threshold, the drive circuit turns on the FET, creating a low-resistance shunt path (<20mΩ) to ground. This architecture-unlike avalanche-based TVS diodes-ensures clamping voltage remains stable across surge current and temperature, with the TDS2211P maintaining 27.5–28V clamping from 24A to 40A and −40°C to +125°C.
Can the TDS2211P replace standard TVS diodes in USB PD VBUS protection?
Yes-the TDS2211P is explicitly validated for USB PD VBUS protection in Semtech's application documentation. Its 22V working voltage, 27.5–28V clamping at 40A, and stable performance up to 125°C ensure compatibility with 20V PD controllers without requiring oversized margins. Unlike standard TVS diodes whose clamping rises with current and temperature, the TDS2211P's FET-based design maintains safe voltage limits across real-world operating conditions, making it a superior drop-in upgrade for existing USB-C designs using devices like SMAJ22A.
What is the recommended PCB layout for optimal performance of the TDS2211P?
Semtech specifies that all three IN pins (4, 5, 6) must be connected in parallel via a single short, straight trace to the protected line-and all three GND pins (1, 2, 3) must connect to a solid ground plane using multiple vias. The device must be placed within 3mm of the connector to minimize inductance and prevent transient coupling. No thermal pad is needed; energy is dissipated in the silicon FET. Layout adherence ensures full 40A surge rating and consistent 27.5–28V clamping performance for the TDS2211P.
Does the TDS2211P meet industrial surge immunity standards?
Yes-the TDS2211P is rated for ±1kV (1.2/50μs voltage + 8/20μs current, RS = 42Ω) per IEC 61000-4-5, satisfying Level 4 industrial surge requirements. It also exceeds IEC 61000-4-2 (±30kV contact/air) and IEC 61000-4-4 (±4kV EFT). These ratings are verified in the official datasheet Rev 2.5 and supported by characterization curves showing stable clamping across temperature and current. For industrial equipment designers, the TDS2211P provides certified, single-device compliance without external components.
How does junction capacitance affect system performance when using the TDS2211P?
The TDS2211P exhibits 175pF junction capacitance at 22V and 1MHz-low enough to avoid degrading DC power rail integrity or causing instability in voltage regulation loops, yet higher than data-line TVS devices (e.g., <1pF). This value is intentional for power-line protection: it provides sufficient filtering of fast transients without introducing resonant peaking or excessive loading. In USB PD applications, this capacitance has no impact on PD communication signaling (which occurs on separate CC lines), making the TDS2211P suitable exclusively for VBUS protection-not high-speed data lanes.
SCDA4F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Module
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Diode Configuration:
- -
- Technology:
- -
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io) (per Diode):
- 3.75A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 150 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 400 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
SCDA4F FAQ
1.How can I place an order for SCDA4F through Aetrix?
Please submit a Request for Quotation (RFQ) for SCDA4F 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 SCDA4F reliable?
The price and inventory of SCDA4F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SCDA4F is usually 5 days.
3.What payment methods are accepted for SCDA4F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SCDA4F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SCDA4F?
SCDA4F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SCDA4F 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 SCDA4F?
For technical support, including SCDA4F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SCDA4F requirements.
6.How does Aetrix verify that SCDA4F is sourced from the original manufacturer or authorized distributors?
All SCDA4F 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 SCDA4F meets industry standards.
7.What is the process for return or replacement of SCDA4F?
All SCDA4F units undergo pre-shipment inspection (PSI). If there is an issue with SCDA4F, 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 SCDA4F part is unused and in its original packaging.
Return procedure for SCDA4F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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