My Inquiry
My Account
onsemi SMS05T1G
- Part No.:
- SMS05T1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SC-74, SOT-457
- Datasheet:
-
SMS05T1G.pdf
- Description:
- TVS DIODE 5VWM 15.5VC SC74
- Quantity:
- Payment:
- Shipping:
Inventory:20,803
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMS05T1G from onsemi is a quad unidirectional ESD and surge protector in SC-74 package, rated for 5 V working voltage, 350 W peak pulse power (8 × 20 µs), 9.8 V clamping voltage at 23 A, and 25 kV HBM ESD rating. It protects four independent signal lines in portable electronics against transient overvoltage events.
For engineers reviewing the SMS05T1G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage under 23 A surge, sub-10 pF capacitance per channel, SC-74 footprint compatibility, and AEC-Q101 qualification for automotive-grade reliability validation.
Technical Context
The SMS05T1G integrates four separate unidirectional silicon avalanche diodes in a single SC-74 (Case 318F) monolithic die. Each channel provides low-clamp protection with 5.0 V working peak reverse voltage and 7.2 V maximum breakdown voltage at 1 mA test current.
It meets IEC 61000-4-2 (15 kV air / 8 kV contact), IEC 61000-4-4 (40 A EFT), and IEC 61000-4-5 (23 A surge, 8/20 µs) immunity standards. Thermal resistance is 556 °C/W, enabling operation from −55 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 350 W (8 × 20 µs waveform) - sustains high-energy transients without failure |
| Clamping Voltage | 9.8 V @ 23 A - limits downstream IC voltage stress during surge events |
| Working Peak Reverse Voltage | 5.0 V - matches standard 5 V logic and USB interface rails |
| ESD Rating (HBM) | >25 kV - exceeds Class N requirement for robust handling in assembly |
| Capacitance @ 0 V, 1 MHz | 250–400 pF total (≈62–100 pF per channel) - preserves high-speed signal integrity |
| Breakdown Voltage | 6.0–7.2 V @ 1 mA - ensures reliable turn-on before system damage threshold |
| Leakage Current | <1.0 µA @ 5 V - negligible standby power impact on battery-powered devices |
Pinout & Package
Package: SC-74 (Case 318F, Style 1), surface-mount, Pb-free, RoHS-compliant, 6-pin plastic package with 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode (Channel 1) | Common cathode connection for first unidirectional TVS path |
| 2 | Anode (Channel 1) | Input node for Channel 1; connects to protected line |
| 3 | Cathode (Channel 2) | Common cathode for second independent TVS channel |
| 4 | Cathode (Channel 3) | Common cathode for third independent TVS channel |
| 5 | Anode (Channel 2) | Input node for Channel 2; enables dual-anode/cathode layout |
| 6 | Cathode (Channel 4) | Common cathode for fourth independent TVS channel |
Key Features
| Feature | Design Value |
|---|---|
| Quad unidirectional configuration | Four independent 5 V protection paths in one SC-74 footprint - saves board space vs discrete solutions |
| 350 W peak pulse rating | Withstands 8/20 µs surges up to 23 A without degradation - exceeds IEC 61000-4-5 Level 3 |
| Low clamping voltage (9.8 V) | Minimizes voltage overshoot on protected 5 V lines - safeguards 5 V tolerant interfaces like USB 2.0 |
| AEC-Q101 qualified | Validated for automotive applications including infotainment and body control modules requiring PPAP compliance |
| 25 kV HBM ESD rating | Eliminates need for additional ESD pre-protection in handheld assembly lines and field service environments |
Applications
| USB 2.0 Data Lines | Automotive Infotainment I/O |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB 2.0 ports in automotive head units and docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS array clamping transient energy before it reaches the USB transceiver IC. Use Value: Maintains signal integrity with ≤100 pF/channel capacitance while clamping to 9.8 V at 23 A - prevents data corruption and PHY latch-up. | Use Scenario: Shielding CAN/LIN bus interface pins and display control signals in vehicle infotainment systems. IC Role / Device Role / Timing Role: Front-end surge suppressor for low-voltage digital I/O exposed to load dump and ISO 7637-2 pulses. Use Value: AEC-Q101 qualification and 350 W peak power rating ensure reliability under automotive electrical stress conditions. |
| Portable Medical Devices | Industrial Handheld Terminals |
Use Scenario: ESD protection for touch screen controller and sensor interface lines in battery-powered diagnostic tools. IC Role / Device Role / Timing Role: Primary ESD guard for I²C, SPI, and GPIO lines operating at 3.3–5 V. Use Value: 25 kV HBM rating and <1 µA leakage enable safe use in low-power, long-battery-life medical instruments. | Use Scenario: Surge suppression on RS-232/485 and keypad scan lines in warehouse barcode scanners and rugged PDAs. IC Role / Device Role / Timing Role: Transient voltage suppressor for industrial I/O subject to electrostatic discharge and inductive switching noise. Use Value: Quad-channel integration reduces component count and PCB area versus four discrete 5 V TVS diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD and surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF05CT1G | Same SC-74 package, but bidirectional; 12.5 V clamping @ 23 A; higher capacitance (500 pF total) | Used where AC-coupled or bidirectional signal lines require symmetrical clamping | Select when protecting differential pairs or analog sensors needing balanced response |
| TPD4E05U06DQAR | Quad unidirectional, 0.5 pF/channel, 12 V clamping @ 5 A; lower surge rating (55 W) | Targeted at high-speed data lines (USB 3.0, HDMI) where ultra-low capacitance is critical | Choose for >100 Mbps interfaces where SMS05T1G's 100 pF/channel may cause signal degradation |
Compared with SMF05CT1G and TPD4E05U06DQAR, the SMS05T1G delivers optimal balance of 350 W surge capacity, 9.8 V clamping, and AEC-Q101 qualification - making it preferred for cost-sensitive, high-reliability 5 V digital I/O protection in automotive and industrial edge devices.
Availability
SMS05T1G is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive infotainment I/O hardening, and portable medical device ESD safeguarding requiring stable component supply and long-term lifecycle support.
Supply support for SMS05T1G 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The SMS05T1G belongs to the SMS05T1 Series of quad ESD/surge protectors designed specifically for compact, high-reliability transient suppression in space-constrained 5 V digital interfaces.
FAQ
What is the clamping voltage of SMS05T1G at its rated surge current?
The SMS05T1G has a maximum clamping voltage of 9.8 V when subjected to a 23 A peak pulse current (8 × 20 µs waveform), as specified in the Electrical Characteristics table. This value ensures protected 5 V circuits remain below destructive voltage thresholds during transient events. The SMS05T1G achieves this performance using monolithic silicon avalanche diode structure optimized for fast response and low dynamic impedance.
Is SMS05T1G qualified for automotive applications?
Yes, SMS05T1G is AEC-Q101 qualified and PPAP capable, with the SZSMS05T1G variant explicitly designated for automotive use. Its construction, testing, and traceability meet automotive quality requirements, and it operates reliably across −55 °C to +150 °C junction temperature range. The SMS05T1G is commonly deployed in infotainment, telematics, and body control modules where ESD and surge resilience are mandatory.
How many independent protection channels does SMS05T1G provide?
The SMS05T1G provides four independent unidirectional protection channels in a single SC-74 package. Pin assignments confirm Channels 1–4 each have dedicated anode and cathode terminals (Pins 1–2, 3, 4, 5, 6), enabling discrete protection of four separate 5 V signal lines. This quad architecture eliminates the need for multiple discrete TVS diodes and reduces PCB routing complexity compared to single-channel alternatives.
What is the maximum capacitance per channel of SMS05T1G?
The SMS05T1G exhibits a total capacitance of 250–400 pF measured at 0 V and 1 MHz, corresponding to approximately 62–100 pF per channel. This low capacitance supports signal integrity in 5 V digital interfaces such as USB 2.0 and UART, where excessive loading could distort rise/fall times. The SMS05T1G's capacitance is confirmed in the Electrical Characteristics table on page 2 of the official datasheet.
Does SMS05T1G meet international ESD and surge immunity standards?
Yes, SMS05T1G complies with IEC 61000-4-2 (15 kV air, 8 kV contact), IEC 61000-4-4 (40 A EFT), and IEC 61000-4-5 (23 A surge, 8/20 µs). It also exceeds 25 kV per Human Body Model (HBM) and carries UL 94 V-0 flammability rating. These certifications are validated in the datasheet's Features and Electrical Characteristics sections, confirming the SMS05T1G's suitability for globally deployed consumer, industrial, and automotive end equipment.
SMS05T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SC-74, SOT-457
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 15.5V
- Current - Peak Pulse (10/1000µs):
- 23A (8/20µs)
- Power - Peak Pulse:
- 350W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 250pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-74
SMS05T1G FAQ
1.How can I place an order for SMS05T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SMS05T1G 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 SMS05T1G reliable?
The price and inventory of SMS05T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMS05T1G is usually 5 days.
3.What payment methods are accepted for SMS05T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMS05T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMS05T1G?
SMS05T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMS05T1G 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 SMS05T1G?
For technical support, including SMS05T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMS05T1G requirements.
6.How does Aetrix verify that SMS05T1G is sourced from the original manufacturer or authorized distributors?
All SMS05T1G 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 SMS05T1G meets industry standards.
7.What is the process for return or replacement of SMS05T1G?
All SMS05T1G units undergo pre-shipment inspection (PSI). If there is an issue with SMS05T1G, 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 SMS05T1G part is unused and in its original packaging.
Return procedure for SMS05T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMS05T1G 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
