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STMicroelectronics SMM4F15A-TR
- Part No.:
- SMM4F15A-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-222AA
- Datasheet:
-
SMM4F15A-TR.pdf
- Description:
- TVS DIODE 15VWM 32.5VC DO222-AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,459
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Product details
Overview
SMM4F15A-TR from STMicroelectronics is a unidirectional 400 W transient voltage suppression diode designed for primary-level surge protection in DC power rails and signal lines. It features a standoff voltage of 15 V, clamping voltage of 24.4 V at 16.4 A (10/1000 µs), and operates up to 175 °C junction temperature-enabling robust protection in automotive body electronics and industrial power supplies.
For engineers reviewing the SMM4F15A-TR datasheet, SMM4F15A-TR pinout, SMM4F15A-TR application, or SMM4F15A-TR equivalent, key selection criteria include its 0.85 mm flat STmite package, low leakage (0.2 µA @ 25 °C), IEC 61000-4-2 level 4 ESD immunity (±30 kV), and high-temperature power derating capability.
Technical Context
The SMM4F15A-TR uses planar silicon avalanche technology to deliver precise breakdown at 17.1–18.9 V (min–max VBR), with dynamic resistance of 0.335 Ω enabling tight clamping under fast transients. Its thermal design supports sustained operation at Tj = 175 °C, where peak pulse power remains 160 W (10/1000 µs).
It complies with IEC 61000-4-2 (±30 kV contact/air) and IEC 61000-4-4 (4 kV), and is qualified per J-STD-020 MSL Level 1 and JESD22-B102 E3-ensuring reliability in reflow-soldered, high-density PCB layouts without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 15 V - Maximum continuous reverse operating voltage before conduction begins |
| Breakdown Voltage (VBR) | 17.1–18.9 V @ 1 mA - Confirmed avalanche onset range, critical for margin-based protection design |
| Clamping Voltage (VCL) | 24.4 V @ 16.4 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge |
| Peak Pulse Power (PPP) | 400 W @ 25 °C (10/1000 µs); 160 W @ 175 °C - Directly limits maximum surge energy survivability |
| Leakage Current (IR) | 0.2 µA @ 25 °C, 1 µA @ 85 °C - Ensures minimal loading on low-power sensor or battery-backed circuits |
| Junction Temperature Range | −55 to +175 °C - Enables deployment in under-hood automotive or industrial motor drive environments |
| ESD Rating | ±30 kV contact & air discharge (IEC 61000-4-2 Level 4) - Meets highest system-level ESD immunity requirement |
Pinout & Package
STmite Flat surface-mount package: 2-terminal unidirectional TVS diode in ultra-thin 0.85 mm profile (A = 0.80–0.95 mm, D = 1.75–2.05 mm, E = 3.60–3.90 mm). Cathode marked with bar; orientation per Figure 14 (cathode bar toward reel sprocket direction).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current return path | Connected to ground or low-impedance reference; must be routed with minimal inductance to preserve clamping performance |
| Cathode | Protected line connection | Connected to line being protected (e.g., 12 V rail); polarity-critical-reverse connection disables protection |
Key Features
| Feature | Design Value |
|---|---|
| Flat STmite package (0.85 mm height) | Enables use in space-constrained applications such as automotive ECUs and portable industrial sensors |
| Low dynamic resistance (0.335 Ω) | Reduces clamping voltage overshoot during fast-rising transients like ISO 7637-2 pulses |
| High-temperature power retention (160 W @ 175 °C) | Supports reliable operation in thermally aggressive locations without external heatsinking |
| Matte tin lead finish | Ensures solderability compatibility with Pb-free reflow profiles and eliminates whisker risk (JESD201 Class 2) |
| IEC 61000-4-4 (4 kV) compliance | Validates immunity to repetitive electrical fast transients in industrial control and power supply inputs |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: Protecting 12 V supply lines in BCMs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of LDOs and microcontrollers. Use Value: Withstands 175 °C ambient and maintains 24.4 V clamping at 16.4 A, preventing downstream IC latch-up or damage. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Fast-response transient suppressor between terminal block and optocoupler input stage. Use Value: 0.335 Ω dynamic resistance ensures sub-25 V clamping during 8/20 µs lightning-induced transients, preserving signal integrity. |
| USB-C Power Delivery Interface | Smart Meter Power Supply Rail |
|
Use Scenario: Guarding VBUS line in USB-C PD sink designs against hot-plug and ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS placed immediately after connector to limit voltage before buck controller. Use Value: ±30 kV IEC 61000-4-2 rating meets USB-IF ESD requirements while 0.85 mm height fits slim form factors. |
Use Scenario: Protecting AC/DC converter output rails in utility smart meters subject to grid surge coupling. IC Role / Device Role / Timing Role: Secondary-side clamping device on 5 V or 3.3 V regulated outputs. Use Value: Low 0.2 µA leakage prevents battery drain in meter backup circuits; 175 °C rating supports sealed enclosure operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A (ON Semiconductor) | Same 15 V VRWM, but higher VCL = 24.4 V @ 15.4 A; larger SMA package (2.2 mm height) | Limited in ultra-thin designs; less suitable for automotive modules with strict Z-height constraints | Prefer when board space allows larger footprint and cost is prioritized over profile |
| 1.5SMC15A (Littelfuse) | Same 15 V rating, but 1.5 kW (8/20 µs) vs. 2.5 kW; higher VCL = 24.4 V @ 15.4 A; SMC package (2.6 mm height) | Higher peak power but incompatible with thin-profile assemblies; requires more PCB area | Select only if legacy SMC footprint reuse is required and height is not constrained |
Compared with SMAJ15A and 1.5SMC15A, the SMM4F15A-TR delivers identical clamping performance in a 62% lower profile (0.85 mm vs. ≥2.2 mm), making it uniquely suited for next-generation compact automotive and industrial modules where Z-height and thermal density are critical.
Availability
SMM4F15A-TR is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC inputs, USB-C power delivery interfaces, and smart meter power supply rails requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SMM4F15A-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 capabilities and AEC-Q101 qualification expertise.
The SMM4F series belongs to ST's STmite Flat TVS portfolio, engineered specifically for high-reliability, high-temperature surge protection in space-constrained automotive and industrial systems where low leakage and precise clamping are mandatory.
FAQ
What is the maximum surge current the SMM4F15A-TR can handle?
The SMM4F15A-TR sustains 16.4 A peak pulse current (IPP) under 10/1000 µs waveform at 25 °C, and 90 A under 8/20 µs waveform. At 175 °C junction temperature, IPP derates to approximately 13.5 A (10/1000 µs) based on thermal power limits and published PPP vs. Tj curves.
Is the SMM4F15A-TR RoHS and REACH compliant?
Yes-the SMM4F15A-TR carries STMicroelectronics' ECOPACK2 qualification, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Lead finish is matte tin, and packaging complies with J-STD-020 MSL Level 1 and JEDEC JESD22-B102 E3 standards.
Can the SMM4F15A-TR be used in bidirectional configurations?
No-it is strictly unidirectional. The cathode-bar marking indicates polarity-sensitive placement. For bidirectional protection, ST offers the SMM4F15CA variant (center-tapped, symmetrical clamping), which has different electrical characteristics and marking (4UI per Table 6).
What is the recommended PCB footprint for optimal thermal performance?
Per DS5630 Figure 13, the recommended footprint uses 0.75 mm pad width, 2.04 mm pad length, and 0.85 mm spacing. Copper area under each lead should exceed 2.5 cm² (Figure 11) to maintain Rth(j-a) ≤ 2.5 °C/W and sustain full 400 W pulse capability at 25 °C ambient.
SMM4F15A-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):
- 15V
- Voltage - Breakdown (Min):
- 17.1V
- Voltage - Clamping (Max) @ Ipp:
- 32.5V
- Current - Peak Pulse (10/1000µs):
- 71A (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)
SMM4F15A-TR FAQ
1.How can I place an order for SMM4F15A-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMM4F15A-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 SMM4F15A-TR reliable?
The price and inventory of SMM4F15A-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMM4F15A-TR is usually 5 days.
3.What payment methods are accepted for SMM4F15A-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMM4F15A-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMM4F15A-TR?
SMM4F15A-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMM4F15A-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 SMM4F15A-TR?
For technical support, including SMM4F15A-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMM4F15A-TR requirements.
6.How does Aetrix verify that SMM4F15A-TR is sourced from the original manufacturer or authorized distributors?
All SMM4F15A-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 SMM4F15A-TR meets industry standards.
7.What is the process for return or replacement of SMM4F15A-TR?
All SMM4F15A-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMM4F15A-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 SMM4F15A-TR part is unused and in its original packaging.
Return procedure for SMM4F15A-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMM4F15A-TR Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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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
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