My Inquiry
My Account
Semtech Corporation 1N6108
- Part No.:
- 1N6108
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- Axial
- Datasheet:
-
1N6108.pdf
- Description:
- TVS DIODE 9.1VWM 17.7VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,273
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TDS2211P from Semtech is a transient diverting suppressor designed for high-energy EOS/ESD protection of 22V-rated I/O or power lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), and stable 27.5–28V clamping voltage across temperature and current range - deployed in USB Type-C PD, industrial load switch inputs, and IoT device bus protection.
For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, functional role in shunt-based surge diversion, and real-world design trade-offs versus conventional TVS diodes.
Technical Context
The TDS2211P uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit when transient voltage exceeds breakdown threshold - enabling near-constant clamping voltage independent of peak pulse current magnitude. Its dynamic resistance is 20mΩ (8/20μs), and junction capacitance is 175pF at 22V/1MHz.
Unlike conventional TVS diodes whose clamping voltage rises linearly with IPP and temperature, the TDS2211P maintains clamping at ~27.6V from −40°C to +125°C and across 24A–40A surges - due to FET RDS(on) collapse under surge conditions and low-impedance ground path via three dedicated GND pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage before leakage or conduction onset; sets operating ceiling for USB PD and industrial 24V rail protection. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures protected ICs (e.g., USB PD controllers) remain below damage thresholds even under worst-case surge conditions. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for unsymmetrical lines with 42Ω source impedance. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness requirements without external shielding or layout mitigation. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough for 22V power-line protection but not suitable for high-speed data lines (requires companion <0.25pF TVS like RClamp3371ZC). |
| Dynamic Resistance | 20mΩ (8/20μs) - enables flat clamping response; significantly lower than typical TVS diodes (>1Ω), minimizing VC rise with increasing IPP. |
| Reverse Leakage | 130–600nA at 22V - negligible power loss in standby; supports battery-powered IoT devices with multi-year quiescent current budgets. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, Pb-free, RoHS-compliant, UL 94V-0 molding compound. Exposed thermal pad not required - energy dissipated in silicon FET, not junction heating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Low-inductance ground return path; all three must be connected to maximize surge current handling and minimize ground bounce during 40A transients. |
| Pins 4, 5, 6 | IN | Parallel-connected input terminals for protected line (e.g., VBUS); all three must be tied together externally to ensure equal current sharing and full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across −40°C to +125°C and 24A–40A surge range - eliminates thermal derating calculations required for standard TVS diodes. |
| Shunt-FET protection core | Replaces PN-junction avalanche with low-RDS(on) MOSFET switching - reduces clamping voltage by >10V vs. comparable 22V TVS at 40A/125°C. |
| Triple-pin parallel I/O | Three IN and three GND terminals reduce trace inductance and distribute surge current - achieves 40A rating in 1.6mm² footprint, 70% smaller than discrete TVS+RC solutions. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against repetitive fast transients in motor drives, PLCs, and industrial communication interfaces. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBUS lines in USB-C ports supporting up to 20V/5A PD negotiation, exposed to ESD events and lightning-induced surges in docking stations or portable chargers. IC Role / Device Role / Timing Role: Shunt-based transient diverter placed at connector entry point; activates within nanoseconds upon overvoltage detection to clamp and divert surge energy to ground. Use Value: Maintains 27.6V clamping at 40A/125°C - prevents damage to USB PD controllers rated for ≤28V absolute max, unlike TVS diodes that exceed 38V under same conditions. |
Use Scenario: Safeguarding input rails of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation systems subject to 1kV/42Ω surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary front-end surge protector; absorbs energy before it reaches the load switch's internal FET, preventing gate oxide rupture or drain-source breakdown. Use Value: Enables use of cost-optimized load switches without integrated surge protection - extends system reliability while avoiding derating penalties from temperature-dependent TVS clamping. |
| IoT Device Power Rail Protection | Storage Device 22V Backup Supply Protection |
Use Scenario: Securing 22V auxiliary power inputs in battery-backed smart sensors and edge gateways deployed in uncontrolled environments (e.g., outdoor utility boxes, agricultural nodes). IC Role / Device Role / Timing Role: Standalone EOS suppressor on main power entry; operates passively until triggered, adding zero quiescent load beyond 600nA leakage. Use Value: 130–600nA reverse leakage at 22V enables >10-year battery life in always-on monitoring devices - outperforming TVS diodes with µA-level leakage at same voltage. |
Use Scenario: Protecting 22V backup supplies in NVMe SSDs and enterprise storage controllers where transient-induced latch-up could corrupt firmware or erase NAND flash. IC Role / Device Role / Timing Role: Fast-response clamping device on VCC_BKUP rail; suppresses coupling from adjacent high-speed PCIe traces or switching regulators. Use Value: 175pF capacitance avoids signal integrity issues on DC rails while delivering 40A surge handling - balances low parasitics with high-energy absorption unmatched by ceramic varistors or polymer TVS. |
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; 22V VRWM, 35.5V VC @ 12.3A (8/20μs); higher dynamic resistance (~1.2Ω); clamping rises with temperature. | Limited to lower-energy surges (<15A); requires thermal derating above 85°C; unsuitable for 40A/125°C industrial environments. | Select SMAJ22A only for cost-sensitive, low-surge consumer applications where clamping voltage margin >8V is acceptable. |
| SP1003-220 | Bi-directional TVS array; 22V VRWM, 35.7V VC @ 12.3A; 150pF typical; no FET-based clamping - exhibits classic linear VC = VBR + IPP×RDYN behavior. | Designed for bidirectional signal lines (e.g., RS-485); lacks single-line 40A capability; not rated for unsymmetrical power-line surges per IEC 61000-4-5. | Choose SP1003-220 only for differential data line protection where bidirectional clamping and sub-0.3pF variants exist - not a drop-in replacement for TDS2211P's power-rail role. |
Compared with SMAJ22A and SP1003-220, the TDS2211P delivers 10.5V lower clamping at full 40A rating and maintains stability across temperature - making it uniquely suited for 22V power rail protection where controller survival depends on sub-28V transient containment.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD implementations, industrial load switch inputs, and IoT device 22V power rail protection requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/WEEE 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 connectivity - with leadership in transient suppression, LoRa® wireless, and signal integrity solutions.
The TDS product line was engineered specifically to replace conventional TVS diodes in high-reliability 22V–48V power rail applications where clamping voltage stability across temperature and current is critical - targeting USB PD, industrial automation, and ruggedized IoT endpoints.
FAQ
What is the primary protection mechanism used in the TDS2211P?
The TDS2211P employs a surge-rated FET as its core protection element, activated by an integrated precision trigger circuit. When an overvoltage event exceeds the trigger threshold, the FET turns on rapidly, creating a low-impedance shunt path to ground. This architecture - unlike avalanche-based TVS diodes - yields nearly constant clamping voltage across both peak pulse current (24A–40A) and temperature (−40°C to +125°C), and is fundamental to the TDS2211P's performance advantage.
Can the TDS2211P be used on high-speed data lines such as USB SuperSpeed or PCIe?
No, the TDS2211P is not suitable for high-speed data lines. Its 175pF junction capacitance at 22V would severely degrade signal integrity on differential pairs operating above 100MHz. The TDS2211P is explicitly designed for 22V power or low-frequency I/O line protection. For USB SS, DP/DM, or PCIe lanes, Semtech recommends companion low-capacitance TVS devices like RClamp3371ZC (<0.25pF), as documented in the TDS2211P application notes.
Why does the TDS2211P have three IN pins and three GND pins?
The triple-pin configuration for both IN (pins 4–6) and GND (pins 1–3) minimizes parasitic inductance and distributes surge current evenly across the package. Connecting all six pins as specified ensures the full 40A (8/20μs) peak pulse current rating is achieved - a requirement confirmed in the datasheet's PCB layout guidelines. Omitting any pin reduces effective surge handling and may cause localized overheating or premature failure during IEC 61000-4-5 testing.
How does the clamping performance of the TDS2211P compare to standard TVS diodes at elevated temperature?
At 125°C, the TDS2211P clamps at ~27.6V across its full 40A rating, with variation under 0.5V. In contrast, a typical 22V TVS diode (e.g., SMAJ22A) clamps at ~38V under identical conditions - a 10.4V penalty caused by positive temperature coefficient of VBR and fixed dynamic resistance. This difference is critical for protecting ICs with tight absolute maximum voltage margins, and is a key validated specification of the TDS2211P.
Is a thermal pad or heatsink required for the TDS2211P during surge events?
No thermal pad or external heatsink is required for the TDS2211P. Unlike TVS diodes that dissipate surge energy in the PN junction, the TDS2211P channels energy through the low-RDS(on) channel of its integrated FET - resulting in minimal junction heating. The datasheet explicitly states "no thermal pad is needed," and thermal performance is validated across −40°C to +125°C ambient without derating - a direct consequence of the TDS2211P's solid-state shunt architecture.
1N6108 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):
- 9.1V (Max)
- Voltage - Breakdown (Min):
- 10.8V
- Voltage - Clamping (Max) @ Ipp:
- 17.7V
- Current - Peak Pulse (10/1000µs):
- 28.2A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N6108 FAQ
1.How can I place an order for 1N6108 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6108 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 1N6108 reliable?
The price and inventory of 1N6108 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6108 is usually 5 days.
3.What payment methods are accepted for 1N6108?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6108 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6108?
1N6108 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6108 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 1N6108?
For technical support, including 1N6108 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6108 requirements.
6.How does Aetrix verify that 1N6108 is sourced from the original manufacturer or authorized distributors?
All 1N6108 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 1N6108 meets industry standards.
7.What is the process for return or replacement of 1N6108?
All 1N6108 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6108, 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 1N6108 part is unused and in its original packaging.
Return procedure for 1N6108:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6108 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
