My Inquiry
My Account
Semtech Corporation SM75
- Part No.:
- SM75
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
SM75.pdf
- Description:
- DIODE GEN PURP 7.5KV 300MA AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,221
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 protection of 22V-rated I/O or power lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and 20mΩ dynamic resistance - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature, low dynamic resistance under surge, DFN-6 footprint compatibility, and compliance with IEC 61000-4-4/4-5 standards for robust industrial and portable device designs.
Technical Context
The TDS2211P uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) across 24–40A IPP and −40°C to +125°C due to decreasing RDS(on) under surge.
It operates with reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V, and junction capacitance of 175pF at 22V/1MHz - enabling effective protection without signal integrity degradation on medium-speed buses like USB PD VBUS or industrial 24V rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD bus and industrial 24V systems without derating. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays below 30V damage threshold of most load switches and PD controllers. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds USB IF and IEC 61000-6-2 requirements. |
| Dynamic Resistance | 20mΩ - ensures minimal voltage rise during surge, critical for low-voltage margin systems. |
| Junction Capacitance | 175pF at 22V/1MHz - suitable for DC/low-frequency power line protection; not for high-speed data lines. |
| Package | DFN 1.6×1.6×0.55mm, 6-lead - enables ultra-compact placement near connectors with minimal PCB area. |
Pinout & Package
Package: DFN 1.6 mm × 1.6 mm × 0.55 mm, 6-lead, Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three must be connected to maximize current handling and minimize inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., USB PD VBUS, load switch VIN); parallel connection ensures uniform current sharing and thermal distribution. |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping voltage | 27.5–28V across full 24–40A surge range and −40°C to +125°C - eliminates thermal derating uncertainty vs. TVS diodes. |
| Surge-rated FET architecture | Shunt FET with <0.1Ω RDS(on) activated by precision trigger - delivers lower clamping than Zener-based TVS at high IPP. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against repetitive fast transients in motor drives and PLCs. |
| Low leakage | 130–600nA at 22V - avoids system standby current penalty in battery-powered IoT devices. |
| Board space optimized | 1.6×1.6mm footprint - saves >60% area vs. SOT-23 or SOIC alternatives while maintaining 1120W peak power rating. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting the VBUS line of USB Type-C connectors supporting up to 20V/5A PD negotiation in notebooks and docking stations. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector entry point to clamp lightning-induced surges and ESD before reaching PD controller ICs. Use Value: Maintains 27.5–28V clamping across temperature - prevents overvoltage damage to controllers rated for ≤30V absolute max, unlike TVS diodes whose clamping rises with temperature. |
Use Scenario: Front-end protection of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment. IC Role / Device Role / Timing Role: Surge shunt device absorbing 40A transients (8/20μs) on 24V supply rails to prevent internal FET avalanche failure in e-fuse ICs. Use Value: 20mΩ dynamic resistance limits voltage overshoot during surge, keeping stress on load switch gate oxide within safe operating area. |
| IoT Device Power Rail Protection | Storage Device 24V Bus Protection |
|
Use Scenario: Securing 22V-rated power inputs of cellular-connected edge sensors and smart actuators exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Primary EOS protector on main DC input, coordinated with downstream low-capacitance TVS for signal lines. Use Value: ±30kV ESD rating and −40°C to +125°C operation ensure reliability in uncontrolled outdoor or industrial ambient conditions. |
Use Scenario: Safeguarding 24V auxiliary power rails in NVMe SSD enclosures and enterprise storage backplanes subject to hot-plug transients. IC Role / Device Role / Timing Role: Clamping device on power delivery path to storage controller ASICs and PMICs during insertion/removal events. Use Value: 1120W peak pulse power rating handles repeated 1.2/50μs + 8/20μs combination waveforms per IEC 61000-4-5 without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2411P | 24V working voltage, 28–30V clamping at 40A, same DFN-6 package and FET architecture. | Suitable for 24V nominal systems; higher VRWM may reduce margin on 22V rails. | Select when protecting 24V industrial buses where 22V devices risk premature triggering. |
| SMAJ22A | Standard unidirectional TVS diode, 22V VRWM, 35.5V clamping at 24.7A, DO-214AC package. | Larger footprint, higher clamping voltage increases risk of downstream IC damage at elevated temperature. | Use only if cost sensitivity outweighs clamping performance and board space constraints. |
Compared with TDS2211P, TDS2411P offers higher VRWM for 24V systems but slightly higher clamping, while SMAJ22A provides lower cost but sacrifices clamping stability, thermal robustness, and PCB area efficiency - making TDS2211P optimal for compact, thermally demanding, or high-reliability 22V applications.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT device power rail protection requiring stable component supply, long-term lifecycle support, and consistent surge performance across temperature extremes.
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 high-performance analog and mixed-signal semiconductors for power management, protection, and signal integrity.
The TDS family was engineered specifically for high-energy EOS protection in next-generation USB, industrial, and automotive power interfaces - replacing legacy TVS solutions with superior clamping consistency and thermal resilience.
FAQ
What is the maximum operating temperature for the TDS2211P?
The TDS2211P supports continuous operation from −40°C to +125°C ambient temperature. Its clamping voltage remains stable across this full range - measured at 27.5–28V at 40A - unlike conventional TVS diodes whose clamping degrades with rising temperature. This makes TDS2211P suitable for under-hood automotive modules or industrial control cabinets without thermal derating.
Does the TDS2211P require external bias or control signals to function?
No, the TDS2211P is fully passive and self-activating. It contains an integrated precision trigger circuit and surge-rated FET that automatically turn on when transient voltage exceeds the breakdown threshold (~25–27.9V). No external power, enable pins, or configuration are needed - the TDS2211P operates immediately upon installation in the signal path.
Can the TDS2211P be used on high-speed data lines like 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. It is intended exclusively for DC or low-frequency power lines such as USB PD VBUS, load switch inputs, or 24V industrial rails. For data lines, Semtech recommends RClamp3371ZC (<0.25pF).
How does the TDS2211P compare to standard TVS diodes in surge handling?
The TDS2211P delivers significantly better surge performance than standard TVS diodes: it maintains 27.5–28V clamping across 24–40A and −40°C to +125°C, whereas a typical 22V TVS (e.g., SMAJ22A) clamps at ~35.5V and worsens with temperature. Its 20mΩ dynamic resistance and FET-based architecture enable lower let-through energy and higher reliability in repetitive surge environments.
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 (4,5,6) via a single short, wide trace to the protected line, and tie all three GND pins (1,2,3) directly to a solid ground plane using multiple vias. Avoid thermal pads - energy is dissipated internally. This minimizes parasitic inductance and ensures full 40A surge capability without voltage overshoot.
SM75 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Axial
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 7500 V
- Current - Average Rectified (Io):
- 300mA
- Voltage - Forward (Vf) (Max) @ If:
- 10 V @ 100 mA
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2.5 µs
- Current - Reverse Leakage @ Vr:
- 1 µA @ 7500 V
- Capacitance @ Vr, F:
- 3.2pF @ 5V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
- Operating Temperature - Junction:
- -65°C ~ 175°C
SM75 FAQ
1.How can I place an order for SM75 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM75 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 SM75 reliable?
The price and inventory of SM75 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM75 is usually 5 days.
3.What payment methods are accepted for SM75?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM75 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM75?
SM75 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM75 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 SM75?
For technical support, including SM75 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM75 requirements.
6.How does Aetrix verify that SM75 is sourced from the original manufacturer or authorized distributors?
All SM75 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 SM75 meets industry standards.
7.What is the process for return or replacement of SM75?
All SM75 units undergo pre-shipment inspection (PSI). If there is an issue with SM75, 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 SM75 part is unused and in its original packaging.
Return procedure for SM75:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM75 Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
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 …
