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STMicroelectronics SMM4F10A-TR
- Part No.:
- SMM4F10A-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-222AA
- Datasheet:
-
SMM4F10A-TR.pdf
- Description:
- TVS DIODE 10VWM 21.7VC DO222-AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,016
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Product details
Overview
SMM4F10A-TR from STMicroelectronics is a unidirectional 400 W transient voltage suppression (TVS) diode designed for primary-level surge protection in DC power rails and I/O lines. It features a standoff voltage of 10 V, clamping voltage of 17.0 V at 23.5 A (10/1000 µs), low leakage current (0.2 µA at 25 °C), and operates up to 175 °C junction temperature - enabling robust protection in automotive body electronics and industrial power supplies.
For engineers reviewing the SMM4F10A-TR datasheet, SMM4F10A-TR pinout, SMM4F10A-TR application, or SMM4F10A-TR equivalent, key selection criteria include clamping performance under 10/1000 µs and 8/20 µs surges, thermal derating above 25 °C, standoff voltage tolerance, and compatibility with STmite Flat footprint per IPC7531.
Technical Context
The SMM4F10A-TR uses planar silicon avalanche technology to deliver precise breakdown at 11.4–12.6 V (min–max VBR) and controlled dynamic resistance (0.188 Ω) for predictable clamping behavior. Its unidirectional configuration supports DC-biased signal and power line protection without reverse conduction during normal operation.
Designed for high-reliability environments, it sustains 400 W peak pulse power at Tj = 25 °C and retains 160 W capability at Tj = 175 °C, validated per IEC 61000-4-2 (±30 kV contact/air) and IEC 61000-4-4 (4 kV). The STmite Flat package enables low-profile mounting on FR4 PCBs with 70 µm copper.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 10 V - maximum continuous reverse operating voltage before clamping initiates |
| Breakdown Voltage (VBR) | 11.4–12.6 V at 1 mA - ensures reliable triggering margin above nominal rail voltage |
| Clamping Voltage (VCL) | 17.0 V at 23.5 A (10/1000 µs) - limits downstream voltage stress during surge events |
| Peak Pulse Power (PPP) | 400 W (10/1000 µs, Tj = 25 °C) - defines maximum single-event energy absorption capacity |
| Leakage Current (IR) | 0.2 µA at 25 °C, 1 µA at 85 °C - minimizes standby power loss and avoids false triggering |
| Junction Temperature Range | −55 °C to +175 °C - supports under-hood automotive and high-ambient industrial use |
| ESD Rating | ±30 kV contact/air (IEC 61000-4-2 Level 4) - exceeds standard immunity requirements for user interfaces |
Pinout & Package
Package: STmite Flat - ultra-thin surface-mount package (0.85 mm height), JEDEC-registered outline, IPC7531-compliant footprint, matte tin lead finish, MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward surge | Connected to protected line (e.g., 12 V rail); conducts only during overvoltage transients |
| Cathode | Current exit / reference node | Connected to ground or lower-potential return path; marked with cathode bar on top surface |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature operation | Rated for continuous operation up to 175 °C junction temperature - eliminates thermal derating concerns in enclosed enclosures |
| Low dynamic resistance | 0.188 Ω - ensures tight clamping voltage control across surge current range (1–23.5 A) |
| Flat, low-profile package | 0.85 mm max height - enables placement in space-constrained modules (e.g., automotive ECUs, IoT sensor nodes) |
| Ultra-low leakage | 0.2 µA @ 25 °C - prevents battery drain in always-on systems and avoids false trips in high-impedance circuits |
| IEC 61000-4-2 Level 4 compliance | ±30 kV contact/air discharge - meets stringent ESD immunity for exposed connectors and buttons |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: Protecting 12 V supply lines feeding microcontroller I/O and CAN transceivers against load dump and ISO 7637-2 pulses. IC Role / Device Role: Primary TVS clamp on main power rail, placed upstream of LDO regulators and ESD-sensitive ICs. Use Value: Clamps to 17.0 V at 23.5 A, limiting voltage stress below 20 V - preserving regulator input rating and preventing latch-up in downstream logic. |
Use Scenario: Safeguarding 24 V digital input channels from field-induced surges and wiring faults in factory automation cabinets. IC Role / Device Role: Unidirectional surge suppressor at terminal block interface, paired with series current-limiting resistor. Use Value: Withstands 400 W (10/1000 µs) and maintains <1 µA leakage at 85 °C - ensuring stable threshold detection and long-term reliability in hot control panels. |
| USB-C Power Delivery Port | Smart Meter Communication Interface |
|
Use Scenario: Secondary-level protection on VBUS line of USB-C PD ports subject to hot-plug transients and cable ESD. IC Role / Device Role: Fast-response TVS between VBUS and GND, sized to handle 23.5 A peak current without thermal runaway. Use Value: 175 °C Tj(max) and 0.188 Ω RD enable consistent clamping during repeated 10/1000 µs events - critical for multi-port PD controllers. |
Use Scenario: Surge protection on RS-485 or HPLC communication lines in utility smart meters exposed to lightning-induced surges. IC Role / Device Role: Line-to-ground TVS on differential pair, mounted adjacent to connector with minimal trace inductance. Use Value: 30 kV IEC 61000-4-2 rating and 127 A (8/20 µs) capability ensure compliance with IEC 61000-4-5 Class B - required for meter certification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10A | Higher clamping voltage (20.1 V at 24.9 A), larger SMA package (2.2 mm height), lower PPP (400 W same, but derates faster above 25 °C) | Less suitable for space-constrained designs; requires more PCB area and has higher thermal resistance | Choose when legacy SMA footprint is fixed and thermal margin >30 °C exists |
| SMCJ10A | Same VRWM/VBR, but 1500 W PPP rating and DO-214AB package (4.5 mm height); higher leakage (1 µA @ 25 °C) | Better for high-energy surges (e.g., AC mains coupling), but incompatible with low-profile layouts | Prefer for industrial motor drives where surge energy exceeds 400 W, and height is not constrained |
Compared with SMAJ10A and SMCJ10A, the SMM4F10A-TR delivers identical 10 V standoff and superior thermal performance in half the height - making it optimal for modern compact electronics where board space and junction temperature management are critical.
Availability
SMM4F10A-TR is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC inputs, USB-C power delivery ports, and smart meter communication interfaces requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for SMM4F10A-TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management solutions with vertical manufacturing and broad IP portfolio.
The SMM4F series belongs to ST's high-reliability TVS portfolio targeting automotive-grade and industrial-grade surge protection, engineered specifically for planar construction, low leakage, and extended temperature operation in harsh environments.
FAQ
What is the maximum clamping voltage of SMM4F10A-TR under a 10/1000 µs surge?
The maximum clamping voltage is 17.0 V at 23.5 A for a 10/1000 µs waveform, measured at Tj = 25 °C. This value increases with junction temperature per the αT coefficient (7.8 × 10−4/°C), reaching approximately 18.2 V at 125 °C junction temperature.
Is SMM4F10A-TR compatible with lead-free reflow soldering?
Yes - it is qualified for lead-free reflow per J-STD-020 MSL Level 1, with a maximum lead temperature of 260 °C for 10 seconds. The recommended profile includes a peak of 240–245 °C, ramp rates ≤3 °C/s, and time above 210 °C limited to 60–90 seconds.
How does the STmite Flat package improve thermal performance versus standard SMA?
The STmite Flat package reduces thermal resistance junction-to-ambient (Rth(j-a)) by up to 40% compared to SMA due to its low-profile geometry and optimized copper pad layout. At 2.5 cm² total copper area per lead, Rth(j-a) is 3.2 °C/W - enabling 160 W power dissipation at 175 °C Tj.
Can SMM4F10A-TR be used in bidirectional signal line protection?
No - it is a unidirectional TVS diode intended for DC-biased lines. For bidirectional protection (e.g., RS-485, USB D+/D−), a symmetric device like SMM4F10CA or dedicated bidirectional TVS array is required. Using SMM4F10A-TR on AC-coupled or floating lines risks reverse breakdown and failure.
SMM4F10A-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-222AA
- Series:
- SMM4F, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.7V
- Current - Peak Pulse (10/1000µs):
- 106A (8/20µs)
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- STmite Flat (DO222-AA)
SMM4F10A-TR FAQ
1.How can I place an order for SMM4F10A-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMM4F10A-TR 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 SMM4F10A-TR reliable?
The price and inventory of SMM4F10A-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMM4F10A-TR is usually 5 days.
3.What payment methods are accepted for SMM4F10A-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMM4F10A-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMM4F10A-TR?
SMM4F10A-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMM4F10A-TR 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 SMM4F10A-TR?
For technical support, including SMM4F10A-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMM4F10A-TR requirements.
6.How does Aetrix verify that SMM4F10A-TR is sourced from the original manufacturer or authorized distributors?
All SMM4F10A-TR 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 SMM4F10A-TR meets industry standards.
7.What is the process for return or replacement of SMM4F10A-TR?
All SMM4F10A-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMM4F10A-TR, 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 SMM4F10A-TR part is unused and in its original packaging.
Return procedure for SMM4F10A-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMM4F10A-TR Tags
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