My Inquiry
My Account
STMicroelectronics SMA6F100A
;;2.jpg)
- Part No.:
- SMA6F100A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F100A.pdf
- Description:
- TVS DIODE 100VWM 162VC SMAFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:7,479
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA6F100A 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 100 V stand-off voltage (VRM), 111–123 V breakdown range (VBR), and clamps to ≤162 V at 3.8 A (10/1000 µs), enabling robust IEC 61000-4-2 Level 4 ESD protection (±25 kV contact / ±30 kV air) in industrial power supplies and automotive body electronics.
For engineers reviewing the SMA6F100A datasheet, SMA6F100A pinout, SMA6F100A application, or SMA6F100A equivalent, key selection criteria include its 0.2 µA leakage at 25 °C, 175 °C max junction temperature, 4.68 Ω dynamic resistance, and SMA flat package compatibility with IPC7531 footprints - critical for high-reliability, high-temperature PCB layouts.
Technical Context
This TVS diode uses planar silicon technology to achieve low leakage and stable clamping across –55 °C to +175 °C operating junction temperature. Its unidirectional configuration supports DC-biased circuits where reverse conduction must be blocked until breakdown occurs.
The device's voltage-temperature coefficient (αT = 10.7 × 10⁻⁴ /°C) enables predictable VBR and VCL drift over temperature, while its dynamic resistance (RD = 4.68 Ω) directly determines clamping voltage rise under transient current (VCL = VBR + RD × IPP), ensuring repeatable protection behavior in repetitive surge environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 100 V - Maximum continuous reverse working voltage before leakage exceeds 0.2 µA at 25 °C. |
| Breakdown Voltage (VBR) | 111–123 V at 1 mA - Confirmed voltage range where device transitions from high-impedance to low-impedance clamping state. |
| Clamping Voltage (VCL) | ≤162 V at 3.8 A (10/1000 µs) - Peak voltage seen by protected circuit during standardized surge, defining maximum stress on downstream components. |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs), 212 W (8/20 µs) - Sustained surge energy handling capability at Tj = 25 °C; derates to 400 W at Tj = 175 °C. |
| Leakage Current (IRM) | 0.2 µA at 25 °C, 1 µA at 85 °C - Low reverse leakage ensures minimal power loss and signal integrity in always-on systems. |
| Dynamic Resistance (RD) | 4.68 Ω - Slope of VCL vs. IPP curve; determines clamping voltage increase per ampere of surge current. |
| Junction Temperature Range | –55 °C to +175 °C - Enables deployment in under-hood automotive, industrial motor drives, and outdoor power equipment. |
Pinout & Package
The SMA6F100A is housed in an industry-standard SMA (DO-214AC) flat package with two terminals: Cathode (marked band) and Anode. The package complies with JEDEC registered outline and IPC7531 footprint guidelines, supporting automated placement and reflow soldering per J-STD-020 MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line; conducts transient current to ground when Vline > VBR. |
| Anode | Reference/ground return | Tied to system ground or low-impedance return path; completes clamping loop during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 Level 4 compliance | Withstands ±25 kV contact and ±30 kV air discharge without degradation - eliminates need for external ESD filters in front-end interfaces. |
| High-temperature operation | Rated for continuous operation up to Tj = 175 °C - supports placement near heat sources (e.g., MOSFETs, inductors) without derating. |
| Low-leakage planar construction | 0.2 µA IRM at 25 °C - preserves battery life in always-on IoT sensors and reduces thermal drift in precision analog front-ends. |
| Matte tin lead finish | RoHS-compliant, whisker-resistant plating per JESD-201 Class 2 - ensures long-term solder joint reliability in vibration-prone applications. |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Line Protection |
|---|---|
|
Use Scenario: 24 V DC input rail of programmable logic controller (PLC) power supply exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Primary surge clamp placed upstream of DC-DC converter input, absorbing 600 W pulses within 10/1000 µs waveform. Use Value: Limits input rail overshoot to ≤162 V, preventing damage to 36 V-rated input capacitors and enabling single-stage protection without series impedance. |
Use Scenario: CAN_H and CAN_L lines in BCM subjected to ISO 7637-2 pulse 1/2a/5a surges and ESD events during connector mating. IC Role / Device Role / Timing Role: Unidirectional TVS pair (one per line) referenced to chassis ground, clamping fast transients before they reach CAN transceiver inputs. Use Value: Maintains <100 pF junction capacitance at 0 V bias, preserving CAN signal edge integrity and meeting 1 Mbps timing budgets. |
| Outdoor LED Streetlight Driver Input Stage | Telecom Remote Radio Unit (RRU) DC Feeder Protection |
|
Use Scenario: 48 V DC input of constant-current LED driver mounted on utility poles, subject to lightning-induced surges on long feeder cables. IC Role / Device Role / Timing Role: First-line transient suppressor on main DC input, coordinated with MOV and gas discharge tube in multi-stage protection network. Use Value: Withstands repeated 212 W (8/20 µs) surges without parametric shift, extending field lifetime beyond 10 years in harsh environmental conditions. |
Use Scenario: –48 V DC power feed entering RRU enclosure via outdoor cable, vulnerable to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Unidirectional TVS installed at power entry point, clamping negative-going surges toward ground while blocking normal DC bias. Use Value: 175 °C Tjmax rating allows direct mounting on metal heatsink inside sealed RRU housing, eliminating thermal interface material dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100A (Littelfuse) | Same VRM (100 V), but higher VBR (111–123 V → 117–130 V), higher VCL (165 V @ 3.7 A), lower PPP (400 W). | Limited to lower-energy surge environments; not rated for 600 W 10/1000 µs pulses. | Select when cost sensitivity outweighs peak power margin, and surge profiles are dominated by shorter 8/20 µs events. |
| 1.5SMC100A (ON Semiconductor) | Same VRM and VBR range, but larger SMC (DO-214AB) package, higher thermal mass, and higher leakage (1 µA @ 25 °C). | Requires larger PCB footprint; better suited for high-volume, lower-density boards where layout space is available. | Prefer when board-level thermal management is constrained and higher steady-state power dissipation is expected between surges. |
Compared with SMAJ100A and 1.5SMC100A, the SMA6F100A delivers superior 600 W surge handling in the smallest standard footprint (SMA), lower leakage for ultra-low-power systems, and tighter VCL control - making it optimal for space-constrained, high-reliability industrial and automotive modules.
Availability
SMA6F100A is available at Aetrix Electronics and suitable for industrial power supply input protection, automotive body control module (BCM) CAN bus line protection, and outdoor LED streetlight driver input stage requiring stable component supply across extended product lifecycles.
Supply support for SMA6F100A 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 discrete technologies with vertical manufacturing capabilities and broad IP portfolio.
The SMA6FxxA series belongs to ST's Transil™ TVS portfolio, engineered specifically for high-reliability transient suppression in harsh-environment applications where low leakage, high-temperature stability, and precise clamping are mandatory.
FAQ
What is the maximum clamping voltage of SMA6F100A under a 10/1000 µs surge?
The maximum clamping voltage is 162 V at 3.8 A for a 10/1000 µs waveform, measured at Tj = 25 °C. This value increases with junction temperature due to the device's positive voltage temperature coefficient (αT = 10.7 × 10⁻⁴ /°C), reaching ~172 V at Tj = 125 °C using the formula VCL(Tj) = VCL(25 °C) × [1 + αT × (Tj − 25)].
Can SMA6F100A be used in bidirectional protection circuits?
No - SMA6F100A is strictly unidirectional and lacks symmetrical breakdown characteristics. For bidirectional protection, ST offers the SMA6F100CA variant (center-tapped, dual-anode configuration). Using SMA6F100A in AC or floating signal paths risks permanent failure due to reverse conduction beyond its 100 V stand-off rating.
What is the recommended PCB footprint for SMA6F100A?
The recommended footprint follows IPC7531 guidelines for SMA (DO-214AC) packages: pad length ≥3.9 mm, pad width ≥1.25 mm, spacing between pads ≥2.0 mm, and copper area ≥1 cm² per lead to maintain thermal resistance below 40 °C/W. ST's DS12564 specifies exact dimensions in Figure 13, including 0.2 mm solder mask clearance.
How does the 175 °C maximum junction temperature impact system design?
A 175 °C Tjmax allows placement near high-power components (e.g., MOSFETs, inductors) without thermal derating, reducing need for remote mounting or heat spreaders. It also extends operational life in sealed enclosures (e.g., outdoor lighting, automotive ECUs) where ambient temperatures exceed 105 °C, provided PCB copper area and airflow meet ST's thermal impedance curves (Figure 10–11).
SMA6F100A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-221AC, SMA Flat Leads
- Series:
- SMA6F, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 100V (Max)
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 162V
- Current - Peak Pulse (10/1000µs):
- 3.8A
- 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
SMA6F100A FAQ
1.How can I place an order for SMA6F100A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F100A 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 SMA6F100A reliable?
The price and inventory of SMA6F100A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6F100A is usually 5 days.
3.What payment methods are accepted for SMA6F100A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F100A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F100A?
SMA6F100A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F100A 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 SMA6F100A?
For technical support, including SMA6F100A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F100A requirements.
6.How does Aetrix verify that SMA6F100A is sourced from the original manufacturer or authorized distributors?
All SMA6F100A 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 SMA6F100A meets industry standards.
7.What is the process for return or replacement of SMA6F100A?
All SMA6F100A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F100A, 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 SMA6F100A part is unused and in its original packaging.
Return procedure for SMA6F100A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F100A 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
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…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
