X0405MF 1AA2 STMicroelectronics SCR (Other) In Stock
The X0405MF 1AA2 is a sensitive-gate SCR (Silicon Controlled Rectifier) rated at 600V and 1.35A in a through-hole TO-202-3 package. It features low gate trigger current for direct microcontroller or optocoupler drive, suitable for AC power control applications up to 600V.
- Manufacturer
- STMicroelectronics
- Package
- Other
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- X0405MF 1AA2 Datasheet PDF
- Category
- SCR
- Price
- From $0.5900(MOQ 100)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of X0405MF 1AA2?
- 600V blocking voltage rating handles AC mains line voltage up to 277V AC with standard safety margin for lighting and appliance control
- Sensitive gate with low trigger current requirement enables direct drive from optocouplers or low-power logic outputs without additional gate amplification
- Through-hole TO-202-3 package provides robust thermal contact and easy PCB assembly for industrial and consumer power control circuits
What is X0405MF 1AA2 used for?
The X0405MF 1AA2 is used in AC power switching applications including light dimmers, motor speed controllers, and appliance control circuits operating from 120V or 230V AC mains. Its sensitive gate characteristic makes it well suited for triac replacement in single-direction switching loads such as heating elements and solenoids. The TO-202-3 through-hole package simplifies prototyping and repair applications where surface-mount assembly is not required.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the X0405MF 1AA2 datasheet?
X0405MF 1AA2 Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for X0405MF 1AA2?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum blocking voltage and current rating of X0405MF 1AA2 for AC mains switching?
The X0405MF 1AA2 is rated for 600V maximum blocking voltage and 1.35A RMS on-state current. This makes it suitable for switching resistive loads up to approximately 300W on 230V AC mains, such as low-wattage heating elements, indicator lamps, or relay coil drivers where a cost-effective SCR solution is preferred over a triac.
How low is the gate trigger current of X0405MF 1AA2, and can it be driven directly from an optocoupler output?
The X0405MF 1AA2 is classified as a sensitive-gate SCR with a gate trigger current typically below 200 µA. This allows it to be triggered directly by small-signal optocouplers such as the PC817 or MOC3020 series without an intermediate transistor stage, simplifying isolated gate drive circuits and reducing component count by 2 to 3 parts per channel.
Which package does X0405MF 1AA2 use, and how does it compare to surface-mount SCR alternatives for thermal dissipation?
The X0405MF 1AA2 uses a TO-202-3 through-hole package, which allows direct mounting to a heatsink or chassis for improved thermal dissipation compared to SOT-223 or DPAK surface-mount alternatives. The TO-202-3 thermal resistance to ambient is approximately 60°C/W without a heatsink, allowing continuous 1.35A operation up to 80°C ambient when paired with a small clip-on heatsink.
In which applications is X0405MF 1AA2 preferred over a MOSFET for AC load switching at 230V?
The X0405MF 1AA2 is preferred over a MOSFET when switching inductive AC loads such as solenoids or small motors on 230V AC, because the SCR's inherent latching behavior and 600V blocking voltage eliminate the need for high-side gate driver circuits. MOSFETs rated for 600V typically cost 3x to 5x more per unit and require additional bootstrap or isolated gate drive circuitry not needed with the X0405MF 1AA2 sensitive-gate SCR design.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 100+ | $0.7200 | $72.00 |
| 500+ | $0.5900 | $295.00 |
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