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Semtech Corporation 1N6155
- Part No.:
- 1N6155
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- Axial
- Datasheet:
-
1N6155.pdf
- Description:
- TVS DIODE 27.4VWM 52.3VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,869
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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. It delivers ±30kV IEC 61000-4-2 ESD protection, clamps at 27.5–28V under 40A (8/20μs), maintains constant clamping across temperature (−40°C to +125°C), and uses a low-RDS(on) shunt FET for stable voltage limiting in USB PD and industrial load switch inputs.
For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, this device offers superior clamping stability versus conventional TVS diodes-critical when protecting sensitive 22V bus interfaces where thermal drift and peak-current-dependent voltage rise must be avoided.
Technical Context
The TDS2211P implements an active protection architecture: a precision trigger circuit detects overvoltage and activates a surge-rated MOSFET shunt path, achieving near-constant clamping voltage independent of peak pulse current (24A–40A) and operating temperature (−40°C to +125°C). Its dynamic resistance is 20mΩ, enabling low-voltage overshoot during transients.
Unlike passive TVS diodes governed by VC = VBR + IPP × RDYN, the TDS2211P's FET-based topology yields clamping voltage anchored near its trigger threshold (~27.5V), with minimal variation (<0.5V) across full rated current and temperature range-verified per IEC 61000-4-5 (±1kV, 8/20μs) and IEC 61000-4-4 (±4kV EFT).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without leakage or degradation |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures downstream 22V-rated ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surge |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds standard USB/Type-C interface ESD robustness requirements |
| Dynamic Resistance | 20mΩ - enables low-voltage overshoot and high-energy dissipation without thermal runaway |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with low-speed power/data lines (e.g., VBUS, CC, SBU); not suitable for >100MHz signal paths |
| Operating Temperature | −40°C to +125°C - supports industrial and automotive under-hood environments without derating |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three pins must be connected to maximize current sharing and minimize parasitic inductance |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS, load switch input); all three pins are internally paralleled and must be shorted externally for full 40A rating |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A and −40°C to +125°C-enables reliable margin design without worst-case derating |
| FET-based shunt protection | Replaces junction-limited TVS with <0.1Ω RDS(on) switch, shifting energy dissipation from junction to channel and eliminating thermal runaway risk |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs)-reduces voltage overshoot during fast-rising transients (e.g., ESD) |
| High-energy surge rating | 1120W peak pulse power (8/20μs)-supports repeated industrial surges without parametric shift or failure |
| Compact DFN footprint | 1.6mm × 1.6mm area-saves >60% board space vs. comparable SO-8 or SOT-23 TVS solutions while maintaining 6-pin thermal/current capability |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBUS lines in USB-C ports supporting up to 100W PD, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Active transient shunt placed directly at connector, clamping surges before they reach PD controller or e-fuse. Use Value: Maintains 27.5V clamping at 40A and 125°C-prevents controller latch-up or gate oxide damage where conventional TVS would exceed 38V. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and IoT edge nodes. IC Role / Device Role / Timing Role: Primary front-end EOS protector, absorbing 8/20μs surges and preventing internal FET avalanche failure in the load switch. Use Value: Clamping stability ensures load switch gate-source voltage stays within safe limits even during high-temperature operation and repeated surges. |
| IoT Device Power Rail Protection | Storage Device VBUS Line Protection |
Use Scenario: Securing 22V auxiliary power rails in battery-backed smart sensors and gateway modules deployed in uncontrolled environments. IC Role / Device Role / Timing Role: Standalone EOS suppressor on main input rail, coordinated with upstream fusing and downstream LDOs. Use Value: 175pF capacitance avoids signal integrity issues on 22V bias rails, while ±30kV ESD rating ensures field reliability without additional shielding. |
Use Scenario: Protecting SATA or NVMe storage module VBUS inputs against hot-plug transients and system-level ESD coupling. IC Role / Device Role / Timing Role: High-energy clamp on 22V supply path, placed adjacent to connector to minimize trace inductance. Use Value: 40A surge rating handles worst-case backplane coupling events; constant clamping prevents storage controller brownout or reset during transient recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Passive TVS diode; clamping rises from ~35V @ 24A to ~42V @ 40A; higher dynamic resistance (~1.2Ω); no temperature stability guarantee | Limited to lower-temperature, lower-reliability consumer applications; cannot maintain safe margin for 22V PD controllers at 125°C | Select only if cost sensitivity outweighs clamping stability and thermal performance requirements |
| SP1003-220K | Bi-directional TVS; 22V working voltage; clamps at ~36V @ 40A; ±30kV ESD rating; 120pF capacitance | Better for bidirectional signal lines (e.g., RS-485), but lacks constant-clamp behavior and fails to meet 27.5V ceiling needed for 22V PD systems | Prefer for symmetric data lines; avoid for unidirectional 22V power rails requiring tight clamping control |
Compared with SMAJ22A and SP1003-220K, the TDS2211P uniquely delivers sub-28V clamping across full current and temperature range-enabling robust 22V system design without guardbanding or thermal derating, whereas alternatives require significant voltage margin or fail under thermal stress.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT power rail protection requiring stable component supply, long-term lifecycle support, and guaranteed surge performance.
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 semiconductor company specializing in high-performance analog and mixed-signal semiconductors for power management, protection, and signal integrity.
The TDS product line was engineered specifically for high-energy EOS protection in 12–48V systems, addressing limitations of traditional TVS diodes through active FET-based clamping-targeting USB PD, industrial automation, and ruggedized IoT endpoints.
FAQ
What is the primary protection mechanism used in the TDS2211P?
The TDS2211P uses an active transient diverting architecture: a precision trigger circuit detects overvoltage and turns on a low-RDS(on) shunt FET, diverting surge current to ground. Unlike passive TVS diodes, this approach achieves nearly constant clamping voltage (27.5–28V) across 24–40A and −40°C to +125°C-making the TDS2211P ideal for stable 22V system protection.
Can the TDS2211P replace a standard TVS diode like SMAJ22A in a 22V application?
The TDS2211P can functionally replace SMAJ22A in 22V applications but offers critical advantages: it clamps at 27.5–28V across full current and temperature range, whereas SMAJ22A clamps at ~35–42V and degrades with temperature. However, the TDS2211P requires proper PCB layout (all six pins connected) and is not bidirectional-so verify unidirectional use case alignment before substitution.
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 IN pins (4, 5, 6) via a single short, wide trace to the protected line, and tie all GND pins (1, 2, 3) directly to a solid ground plane using multiple vias. Avoid stubs or splits-this minimizes parasitic inductance and ensures full 40A surge handling. The TDS2211P does not require a thermal pad; energy is dissipated in the FET channel, not the junction.
Does the TDS2211P support bidirectional transient protection?
No-the TDS2211P is a unidirectional suppressor designed for positive-going transients on a 22V rail referenced to ground. Its internal architecture (shunt FET triggered by overvoltage relative to GND) does not support reverse-polarity or AC-coupled signal protection. For bidirectional applications such as RS-485 or CAN, a dedicated bi-directional TVS like SP1003-220K is required instead of the TDS2211P.
How does the TDS2211P perform under high-temperature operating conditions?
The TDS2211P maintains stable clamping performance from −40°C to +125°C: clamping voltage remains 27.5–28V at 40A across the full range, and peak pulse current capability holds at 40A. This is confirmed in the datasheet's "Clamping Voltage vs. Temperature" and "Peak Pulse Current vs. Temperature" plots-unlike conventional TVS diodes, whose clamping rises and current rating drops significantly above 85°C.
1N6155 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- Axial
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 27.4V (Max)
- Voltage - Breakdown (Min):
- 32.4V
- Voltage - Clamping (Max) @ Ipp:
- 52.3V
- Current - Peak Pulse (10/1000µs):
- 28.7A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N6155 FAQ
1.How can I place an order for 1N6155 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6155 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 1N6155 reliable?
The price and inventory of 1N6155 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6155 is usually 5 days.
3.What payment methods are accepted for 1N6155?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6155 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6155?
1N6155 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6155 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 1N6155?
For technical support, including 1N6155 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6155 requirements.
6.How does Aetrix verify that 1N6155 is sourced from the original manufacturer or authorized distributors?
All 1N6155 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 1N6155 meets industry standards.
7.What is the process for return or replacement of 1N6155?
All 1N6155 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6155, 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 1N6155 part is unused and in its original packaging.
Return procedure for 1N6155:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6155 Tags
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