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STMicroelectronics X0405MH
- Part No.:
- X0405MH
- Manufacturer:
- STMicroelectronics
- Category:
- SCRs
- Package:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Datasheet:
-
X0405MH.pdf
- Description:
- 4 A SENSITIVE GATE SCR IN IPAK P
- Quantity:
- Payment:
- Shipping:
Inventory:5,975
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Product details
Overview
X0405MH from STMicroelectronics is a 4 A sensitive gate SCR in IPAK package, rated for 600 V repetitive off-state voltage (VDRM/VRRM) and 750 V non-repetitive peak voltage (VDSM/VRSM), with ultra-low 50 µA gate trigger current (IGT), used for AC load switching in home appliance motor controls and power tool trigger circuits.
For engineers reviewing the X0405MH datasheet, X0405MH pinout, X0405MH application, or X0405MH equivalent, key selection criteria include sensitive gate drive compatibility (20–50 µA IGT), thermal resistance (Rth(j-c) = 3 °C/W), junction temperature limit (125 °C), and IPAK through-hole mounting suitability for high-reliability industrial control boards.
Technical Context
This SCR operates as a latching bidirectional thyristor requiring only a brief gate pulse to initiate conduction in either polarity of anode-to-cathode voltage. Its low IGT enables direct drive from microcontroller GPIOs without external amplification.
It features robust dV/dt immunity (min. 15 V/µs at 110 °C) and high surge capability (30 A for 10 ms), supporting reliable turn-on under noisy line conditions and transient overloads in resistive and inductive AC loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IT(RMS) | 4 A - supports continuous AC load current up to 4 A at Tc = 114 °C, suitable for medium-power motor and heater control |
| VDRM / VRRM | 600 V - blocks 600 V repetitive AC line voltage peaks, compatible with 230 VAC mains applications |
| IGT | 50 µA max - enables direct MCU GPIO triggering without buffer stage, reducing BOM count and board space |
| Tj max | 125 °C - allows operation in thermally constrained enclosures with minimal heatsinking |
| Rth(j-c) | 3 °C/W - enables efficient heat transfer to PCB copper or small heatsink, critical for sustained 4 A RMS conduction |
| dV/dt | 15 V/µs min - prevents false triggering from line transients in industrial environments |
| VTM | 1.8 V max at 8 A - ensures low conduction loss and minimal self-heating during on-state |
Pinout & Package
IPAK (TO-251AA) is a compact, isolated through-hole package with three leads: Anode (A), Cathode (K), and Gate (G). The package provides enhanced thermal performance versus standard TO-92 and mechanical robustness for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A | Anode | Main current terminal accepting positive voltage relative to K during forward conduction; connected to AC line or load side |
| K | Cathode | Main current return path; referenced ground point for gate drive circuitry and zero-crossing detection |
| G | Gate | Control input requiring ≥20 µA pulse to trigger latching conduction; polarity-insensitive for both A-K voltage polarities |
Key Features
| Feature | Design Value |
|---|---|
| Sensitive gate trigger | IGT ≤ 50 µA enables direct drive from 3.3 V/5 V MCUs without level-shifting or amplification stages |
| High dV/dt immunity | 15 V/µs minimum at 110 °C prevents spurious turn-on in EMI-prone motor drive and lighting ballast environments |
| Robust surge rating | 30 A non-repetitive surge for 10 ms supports inrush current handling in transformer and capacitor-input circuits |
| Thermal efficiency | Rth(j-c) = 3 °C/W allows full 4 A RMS operation with minimal heatsink, reducing system size and cost |
| ECOPACK2 compliance | Halogen-free molding compound and lead-free plating meet RoHS and REACH requirements for global industrial shipments |
Applications
| Home Appliance Motor Control | Power Tool Trigger Switching |
|---|---|
Use Scenario: Speed-controlled universal motor in vacuum cleaners or blenders, switched via phase-angle dimming. IC Role / Device Role / Timing Role: SCR acts as main AC power switch, triggered synchronously with zero-crossing detection to regulate average power. Use Value: Low IGT ensures reliable triggering from low-power MCU outputs; 600 V VDRM safely handles 230 VAC line spikes and commutation transients. | Use Scenario: Momentary trigger circuit in corded drills, enabling instant start/stop of brushed motor under variable load. IC Role / Device Role / Timing Role: SCR serves as solid-state replacement for mechanical switch, providing arc-free, wearless actuation with precise timing control. Use Value: 30 A surge rating absorbs motor stall currents; IPAK package withstands vibration and thermal cycling in handheld tools. |
| Inrush Current Limiting | Industrial Solenoid Actuation |
Use Scenario: NTC bypass circuit in SMPS or LED drivers, where SCR shorts out thermistor after warm-up. IC Role / Device Role / Timing Role: SCR functions as timed crowbar device, activated by temperature-sensed control logic after delay. Use Value: 750 V VDSM supports safe turn-off during high-voltage capacitor charging transients; 125 °C Tj enables placement near hot components. | Use Scenario: AC-powered solenoid valve in HVAC or fluid control systems requiring fast, repeatable actuation cycles. IC Role / Device Role / Timing Role: SCR delivers full-line voltage pulse to solenoid coil, ensuring rapid magnetic pull-in and consistent mechanical response. Use Value: 4 A IT(RMS) sustains coil hold current; low VTM (1.8 V) minimizes power dissipation during extended on-time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SCR-based AC switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BT169G | 0.8 A IT(RMS), 400 V VDRM, IGT = 50 µA, TO-92 package | Limited to sub-1 A loads; unsuitable for 4 A motor or solenoid drive | Select only for low-power indicator or signal-level AC switching where thermal margin is ample |
| TYN612 | 12 A IT(RMS), 600 V VDRM, IGT = 50 mA, TO-220 package | Requires gate driver due to higher IGT; larger footprint and higher thermal mass | Choose when surge current >30 A or continuous current >4 A is required, accepting added gate drive complexity |
Compared with BT169G and TYN612, X0405MH uniquely balances 4 A RMS capacity, ultra-sensitive 50 µA gate drive, and compact IPAK thermal performance-making it optimal for space-constrained, MCU-driven AC control where both power and drive simplicity matter.
Availability
X0405MH is available at Aetrix Electronics and suitable for home appliance motor control, power tool trigger circuits, inrush current limiting, and industrial solenoid actuation requiring stable component supply across production lifecycles.
Supply support for X0405MH 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, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
X0405MH belongs to the X04 series of sensitive-gate SCRs engineered specifically for cost-sensitive, space-constrained AC load switching in white goods and portable power equipment.
FAQ
What is the maximum gate trigger current (IGT) specification for X0405MH?
The maximum gate trigger current (IGT) is 50 µA at VD = 12 V and RL = 140 Ω, with a minimum of 20 µA under same conditions. This ultra-low IGT enables direct triggering from standard microcontroller GPIO pins without external amplification, reducing system component count and layout complexity.
Can X0405MH be used in 230 VAC applications?
Yes, X0405MH is rated for 600 V repetitive peak off-state voltage (VDRM/VRRM), which exceeds the 325 V peak of 230 VAC mains. Its 750 V non-repetitive rating (VDSM/VRSM) further accommodates line surges and switching transients common in industrial and appliance environments.
What is the thermal resistance from junction to case (Rth(j-c)) for X0405MH?
The maximum junction-to-case thermal resistance is 3 °C/W under DC conditions. This low value allows efficient heat transfer to the PCB copper pour or small heatsink, enabling full 4 A RMS conduction at case temperatures up to 114 °C without derating.
Is X0405MH compliant with environmental regulations?
Yes, X0405MH is ECOPACK2-compliant: its IPAK package uses halogen-free molding compound meeting UL94 V0 flammability standards and lead-free plating, satisfying RoHS, REACH, and other major global environmental directives for industrial and consumer electronics.
X0405MH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- ECOPACK2
- Package/Case:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Packaging:
- Tube
- Product Status:
- Active
- Voltage - Off State:
- 600 V
- Voltage - Gate Trigger (Vgt) (Max):
- 800 mV
- Current - Gate Trigger (Igt) (Max):
- 50 µA
- Voltage - On State (Vtm) (Max):
- 1.8 V
- Current - On State (It (AV)) (Max):
- 2.5 A
- Current - On State (It (RMS)) (Max):
- 4 A
- Current - Hold (Ih) (Max):
- 5 mA
- Current - Off State (Max):
- 5 µA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 30A, 33A
- SCR Type:
- Sensitive Gate
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- IPAK
X0405MH FAQ
1.How can I place an order for X0405MH through Aetrix?
Please submit a Request for Quotation (RFQ) for X0405MH 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 X0405MH reliable?
The price and inventory of X0405MH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for X0405MH is usually 5 days.
3.What payment methods are accepted for X0405MH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for X0405MH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for X0405MH?
X0405MH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your X0405MH 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 X0405MH?
For technical support, including X0405MH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your X0405MH requirements.
6.How does Aetrix verify that X0405MH is sourced from the original manufacturer or authorized distributors?
All X0405MH 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 X0405MH meets industry standards.
7.What is the process for return or replacement of X0405MH?
All X0405MH units undergo pre-shipment inspection (PSI). If there is an issue with X0405MH, 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 X0405MH part is unused and in its original packaging.
Return procedure for X0405MH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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