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STMicroelectronics SMM4F13A-TR
- Part No.:
- SMM4F13A-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-222AA
- Datasheet:
-
SMM4F13A-TR.pdf
- Description:
- TVS DIODE 13VWM 27.2VC DO222-AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,714
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Product details
Overview
SMM4F13A-TR from STMicroelectronics is a unidirectional 400 W transient voltage suppression (TVS) diode designed for primary-level surge protection in DC power rails and signal lines. It features a standoff voltage of 13 V, clamping voltage of 21.5 V at 18.6 A (10/1000 µs), low leakage current (0.2 µA at 25 °C), and operates up to 175 °C junction temperature - deployed in automotive body control modules, industrial PLC I/O terminals, and PoE-powered Ethernet interfaces.
For engineers reviewing the SMM4F13A-TR datasheet, SMM4F13A-TR pinout, SMM4F13A-TR application, or SMM4F13A-TR equivalent, key selection criteria include clamping performance under 10/1000 µs surges, thermal derating above 125 °C, compatibility with STmite Flat footprint (JEDEC MO-275), and compliance with IEC 61000-4-2 Level 4 (±30 kV contact/air discharge).
Technical Context
This TVS diode uses planar silicon technology to achieve low dynamic resistance (0.306 Ω) and stable clamping across temperature - critical for protecting downstream MOSFETs and microcontrollers during repetitive ESD and lightning-induced transients. Its unidirectional configuration enables integration on positive-rail-only paths without reverse-bias conduction concerns.
The STmite Flat package (1.9 mm × 3.8 mm × 0.85 mm) supports high-density PCB layouts while maintaining thermal impedance of 100 °C/W (single pulse, FR4, 70 µm Cu) and meets J-STD-020 MSL Level 1 - enabling lead-free reflow without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 13 V - maximum continuous reverse operating voltage before breakdown; sets minimum system rail margin for reliable blocking. |
| Breakdown Voltage (VBR) | 14.3–15.8 V @ 1 mA - tight tolerance ensures predictable turn-on timing during fast transients. |
| Clamping Voltage (VCL) | 21.5 V @ 18.6 A (10/1000 µs) - limits peak stress on protected ICs to safe levels during surge events. |
| Peak Pulse Power (PPP) | 400 W @ 10/1000 µs - defines single-event energy handling capacity at ambient temperature. |
| Leakage Current (IRM) | 0.2 µA @ 25 °C - negligible standby power loss in battery-backed or low-power sensor circuits. |
| Junction Temperature Range | −55 to +175 °C - enables deployment in under-hood automotive or industrial motor drive environments. |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2 Level 4) - exceeds automotive and industrial immunity requirements. |
Pinout & Package
STmite Flat surface-mount package: 2-terminal unidirectional device in JEDEC MO-275 outline (1.90 mm × 3.80 mm × 0.85 mm height), matte tin-plated leads, cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side terminal | Connected to protected line (e.g., 12 V supply rail); conducts surge current toward ground when clamped. |
| Cathode | Ground-reference terminal | Connected to system ground plane; establishes reference for clamping action and provides return path for transient current. |
Key Features
| Feature | Design Value |
|---|---|
| Flat, low-profile package | 0.85 mm height - fits beneath low-clearance shields and enables double-sided PCB assembly. |
| High-temperature operation | 175 °C max junction temperature - sustains reliability in engine bay or enclosed industrial enclosures. |
| Low dynamic resistance | 0.306 Ω - minimizes voltage overshoot during high-current transients (e.g., ISO 7637-2 pulse 1/2a/5a). |
| UL94 V0 flammability rating | Self-extinguishing epoxy molding compound - satisfies safety requirements for Class II power supplies and industrial equipment. |
| MSL Level 1 moisture sensitivity | No bake required before reflow - eliminates production delays and reduces risk of popcorning during assembly. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Terminal |
|---|---|
Use Scenario: Protects 12 V supply input against load dump and alternator ripple in BCM ECUs. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power rail upstream of LDOs and MCU power domains. Use Value: Clamps 12 V rail to ≤21.5 V during 10/1000 µs surges up to 18.6 A, preventing brownout resets and gate oxide damage. |
Use Scenario: Shields 24 V digital input channels from field-wiring induced transients in factory automation systems. IC Role / Device Role / Timing Role: Front-end transient suppressor before optocoupler or Schmitt-trigger input buffer. Use Value: Limits voltage excursion to <22 V during IEC 61000-4-4 4 kV bursts, ensuring logic-level integrity and long-term isolation barrier life. |
| Power over Ethernet (PoE) PSE Interface | Smart Meter DC Power Rail |
Use Scenario: Guards 48 V PoE power sourcing equipment (PSE) output against cable ESD and hot-swap surges. IC Role / Device Role / Timing Role: Unidirectional rail clamp on secondary-side DC-DC converter input. Use Value: Withstands ±30 kV contact discharge per IEC 61000-4-2 while adding <0.2 µA leakage - preserving efficiency in always-on metering applications. |
Use Scenario: Secures 3.3 V or 5 V internal DC rail in utility smart meters exposed to grid-switching transients. IC Role / Device Role / Timing Role: Secondary-stage TVS after bulk filtering, before PMIC and metrology SoC. Use Value: Maintains clamping performance up to 175 °C ambient - critical for sealed outdoor meter enclosures with no active cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A | Same 13 V VRM, but higher VCL (23.0 V @ 17.4 A), larger SMA package (2.5 mm × 4.5 mm × 2.3 mm), MSL Level 1. | Larger footprint limits use in space-constrained PoE or automotive modules; lower power density (400 W same, but less thermal margin at Tj > 125 °C). | Select when legacy SMA layout exists and thermal derating below 150 °C is acceptable. |
| SMCJ13A | Higher PPP (1500 W @ 10/1000 µs), same VRM/VCL specs, larger SMC package (7.1 mm × 6.2 mm × 2.6 mm), MSL Level 1. | Over-specified for most 400 W applications; requires 3× PCB area; better suited for high-energy industrial mains coupling. | Choose only if system-level testing confirms need for >1 kW surge capability - otherwise increases cost and board space unnecessarily. |
Compared with SMAJ13A and SMCJ13A, SMM4F13A-TR delivers identical 13 V standoff and superior thermal performance in half the footprint - making it optimal for next-generation compact, high-temperature electronics where board area and junction temperature headroom are constrained.
Availability
SMM4F13A-TR is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O terminals, and Power over Ethernet (PoE) interfaces requiring stable component supply, long-lifecycle support, and consistent parametric performance across manufacturing lots.
Supply support for SMM4F13A-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, designing and manufacturing analog, power, microcontroller, and sensor solutions for automotive, industrial, and consumer markets.
SMM4F is part of ST's STmite Flat TVS portfolio - engineered specifically for high-reliability, space-constrained surge protection in automotive and industrial applications where low leakage, flat profile, and extended temperature operation are mandatory.
FAQ
What is the maximum clamping voltage of SMM4F13A-TR under a 10/1000 µs surge?
The maximum clamping voltage is 21.5 V at 18.6 A for a 10/1000 µs waveform, measured at 25 °C ambient. This value increases with junction temperature at a coefficient of 8.4 × 10⁻⁴ V/°C per the datasheet's αT parameter, reaching ~23.2 V at 175 °C junction temperature.
Is SMM4F13A-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 peaks at 240–245 °C for 60–90 seconds, matching standard Pb-free SAC305 processes without preconditioning.
How does SMM4F13A-TR differ from bidirectional TVS diodes like SMBJ13CA?
SMM4F13A-TR is unidirectional and blocks only reverse polarity surges, allowing it to be placed directly on positive DC rails without interfering with normal forward bias operation. Bidirectional types like SMBJ13CA conduct in both directions and require careful placement to avoid unintended conduction during normal system operation.
Can SMM4F13A-TR be used in parallel for higher surge current handling?
No - due to process variation in VBR, paralleling multiple units causes uneven current sharing and premature failure of the lowest-breakdown unit. For higher current, select a single higher-rated device such as SMCJ13A or use a discrete crowbar circuit with external triggering.
SMM4F13A-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):
- 13V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 27.2V
- Current - Peak Pulse (10/1000µs):
- 85A (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)
SMM4F13A-TR FAQ
1.How can I place an order for SMM4F13A-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMM4F13A-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 SMM4F13A-TR reliable?
The price and inventory of SMM4F13A-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMM4F13A-TR is usually 5 days.
3.What payment methods are accepted for SMM4F13A-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMM4F13A-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMM4F13A-TR?
SMM4F13A-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMM4F13A-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 SMM4F13A-TR?
For technical support, including SMM4F13A-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMM4F13A-TR requirements.
6.How does Aetrix verify that SMM4F13A-TR is sourced from the original manufacturer or authorized distributors?
All SMM4F13A-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 SMM4F13A-TR meets industry standards.
7.What is the process for return or replacement of SMM4F13A-TR?
All SMM4F13A-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMM4F13A-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 SMM4F13A-TR part is unused and in its original packaging.
Return procedure for SMM4F13A-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMM4F13A-TR Tags
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