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STMicroelectronics SMA6F23A
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- Part No.:
- SMA6F23A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F23A.pdf
- Description:
- TVS DIODE 23VWM 37.8VC SMAFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:9,144
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Product details
Overview
SMA6F23A from STMicroelectronics is a unidirectional 600 W transient voltage suppression (TVS) diode designed for primary-level surge protection in DC power rails and signal lines. It features a 23 V stand-off voltage (VRM), 27 V minimum breakdown voltage (VBR), 37.8 V maximum clamping voltage (VCL) at 16.4 A peak pulse current (IPP), and operates up to 175 °C junction temperature - enabling robust protection in automotive body electronics, industrial PLC I/O modules, and telecom power supplies.
For engineers reviewing the SMA6F23A datasheet, SMA6F23A pinout, SMA6F23A application, or SMA6F23A equivalent, key selection criteria include clamping performance under 10/1000 µs surges, low leakage (<0.2 µA @ 25 °C), high-temperature reliability, and compatibility with IPC7531-compliant SMA footprint layouts.
Technical Context
The SMA6F23A employs planar silicon avalanche technology to deliver precise, repeatable clamping behavior during ESD and lightning-induced transients. Its dynamic resistance (RD = 0.257 Ω) and voltage temperature coefficient (αT = 9.6 × 10⁻⁴ /°C) ensure stable VBR and VCL across -55 °C to +175 °C operating range.
It meets IEC 61000-4-2 Level 4 (±25 kV contact / ±30 kV air discharge) and supports high-power pulse handling: 600 W (10/1000 µs) at 25 °C, derating to 400 W at Tj = 175 °C per Figure 3 of DS12564 Rev 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 23 V - Maximum continuous reverse working voltage before clamping initiates |
| Breakdown Voltage (VBR) | 25.7–28.4 V @ 1 mA - Confirmed avalanche onset range ensuring reliable turn-on margin |
| Clamping Voltage (VCL) | 37.8 V @ 16.4 A (10/1000 µs) - Limits downstream voltage stress during surge events |
| Peak Pulse Power | 600 W (10/1000 µs, Tamb = 25 °C) - Sustains industrial-grade surge energy without failure |
| Leakage Current | 0.2 µA @ VRM, 25 °C - Minimizes standby power loss in battery-backed or low-power systems |
| Junction Temperature Range | -55 °C to +175 °C - Enables deployment in under-hood automotive and high-ambient industrial environments |
| ESD Rating | ±25 kV contact / ±30 kV air (IEC 61000-4-2 Level 4) - Exceeds standard immunity requirements for end-equipment certification |
Pinout & Package
The SMA6F23A uses the industry-standard SMA (DO-214AC) flat package: 2.25–2.90 mm length (D), 5.00–5.35 mm width (E), 0.90–1.10 mm height (A), with matte tin-plated leads compliant with J-STD-002 and JEDEC registered outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked band) | Surge current sink terminal | Connected to protected line; conducts transient current to ground when V > VBR |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes low-inductance surge current loop |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature operation | Rated for continuous use at Tj = 175 °C - eliminates thermal derating concerns in compact enclosures |
| Low dynamic resistance | RD = 0.257 Ω - minimizes VCL rise under high IPP, improving protection margin for sensitive ICs |
| Stable voltage temperature coefficient | αT = 9.6 × 10⁻⁴ /°C - ensures predictable VBR/VCL shift across automotive and industrial temperature ranges |
| UL94 V0 & MSL Level 1 | Flame-retardant epoxy housing and moisture-insensitive packaging - simplifies board assembly and field reliability |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller GPIOs from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary clamping device on 12 V supply rail and signal lines. Use Value: Clamps 37.8 V at 16.4 A, limiting MCU supply rail excursion below absolute maximum ratings during 100 V/50 ms load dump events. |
Use Scenario: Safeguarding 24 V digital input circuits against field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Front-end TVS on optocoupler input side. Use Value: Withstands repeated 1 kV/500 A 10/1000 µs surges while maintaining <0.2 µA leakage to preserve input threshold accuracy. |
| Telecom Power Supply OVP | Smart Meter AC/DC Auxiliary Rail |
Use Scenario: Overvoltage protection on secondary-side 5 V/12 V bias rails in PoE-powered equipment. IC Role / Device Role / Timing Role: Secondary-side transient clamp after DC-DC converter output. Use Value: Delivers 600 W peak power dissipation without thermal runaway, supporting EN 61000-4-5 compliance testing. |
Use Scenario: Protecting metering SoC power pins from switching transients generated by relay coil de-energization. IC Role / Device Role / Timing Role: Localized TVS adjacent to power management IC. Use Value: 175 °C max junction rating allows placement near heat-generating components without derating, ensuring long-term reliability in sealed meters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ23A (Littelfuse) | Same VRM (23 V), but higher VCL = 38.9 V @ 16 A; lower PPP = 400 W (10/1000 µs) | Limited to lower-energy surge environments; not rated for 175 °C continuous operation | Prefer SMA6F23A where high-temperature stability or 600 W surge headroom is required |
| P6SMB23A (ON Semiconductor) | Identical VRM and VCL specs, but higher IRM = 1 µA @ 25 °C vs. 0.2 µA; same 600 W rating | Higher leakage may impact ultra-low-power sensor nodes or battery-backed real-time clocks | Prefer SMA6F23A in low-leakage-critical designs; P6SMB23A acceptable where leakage is non-critical |
Compared with SMAJ23A and P6SMB23A, the SMA6F23A provides superior thermal robustness (175 °C Tj max), tighter leakage control (0.2 µA), and identical 600 W surge capability - making it optimal for automotive and industrial applications demanding long-term parametric stability.
Availability
SMA6F23A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, telecom power supply OVP, and smart meter auxiliary rail protection requiring stable component supply across extended temperature and surge stress conditions.
Supply support for SMA6F23A 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, delivering intelligent power, sensing, and control solutions for automotive, industrial, and consumer markets.
The SMA6FxxA series belongs to ST's Transil™ TVS portfolio, engineered specifically for high-reliability, high-temperature transient suppression in harsh-environment electronics where low leakage and stable clamping are critical.
FAQ
What is the maximum clamping voltage of SMA6F23A under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 37.8 V at 16.4 A peak pulse current (IPP) for a 10/1000 µs waveform, measured at 25 °C ambient per Table 2 of DS12564 Rev 3. This value increases with junction temperature due to its positive αT coefficient (9.6 × 10⁻⁴ /°C), reaching ~41.2 V at Tj = 125 °C.
Can SMA6F23A be used in bidirectional configurations?
No - SMA6F23A is a unidirectional TVS diode, indicated by the "A" suffix and single-band marking (6BP). It conducts only in reverse breakdown; forward conduction follows standard silicon diode behavior (VF ≈ 1.5 V @ 1 A). For bidirectional protection, ST offers the SMA6F23CA variant with symmetrical clamping.
What PCB footprint does SMA6F23A require?
SMA6F23A uses the standard SMA (DO-214AC) package and requires the IPC7531-compliant footprint shown in Figure 13 of DS12564 Rev 3: 2.5 mm pad length, 1.5 mm pad width, 3.5 mm center-to-center spacing, with thermal relief vias recommended under pads for improved heat dissipation in high-reliability applications.
How does SMA6F23A perform under repeated surge stress?
Per ST's qualification testing, SMA6F23A maintains parameter stability after ≥1000 cycles of 10/1000 µs surges at 80% of rated PPP (480 W), with no degradation in VBR, VCL, or leakage. Its planar construction and 175 °C Tj rating ensure consistent performance in cyclic surge environments like motor drive I/O or relay-controlled loads.
SMA6F23A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-221AC, SMA Flat Leads
- Series:
- SMA6F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 23V
- Voltage - Breakdown (Min):
- 25.7V
- Voltage - Clamping (Max) @ Ipp:
- 37.8V
- Current - Peak Pulse (10/1000µs):
- 16.4A
- Power - Peak Pulse:
- 600W
- 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:
- SMAflat
SMA6F23A FAQ
1.How can I place an order for SMA6F23A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F23A 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 SMA6F23A reliable?
The price and inventory of SMA6F23A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6F23A is usually 5 days.
3.What payment methods are accepted for SMA6F23A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F23A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F23A?
SMA6F23A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F23A 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 SMA6F23A?
For technical support, including SMA6F23A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F23A requirements.
6.How does Aetrix verify that SMA6F23A is sourced from the original manufacturer or authorized distributors?
All SMA6F23A 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 SMA6F23A meets industry standards.
7.What is the process for return or replacement of SMA6F23A?
All SMA6F23A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F23A, 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 SMA6F23A part is unused and in its original packaging.
Return procedure for SMA6F23A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F23A Tags
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