The Z3M belongs to the Z01 series of TRIACs, designed for low-power AC switching and phase control applications. It is particularly suitable for direct interfacing with logic-level control circuits, including microcontrollers, due to its relatively low gate trigger current.
Function: Triac, 600V 1A, Sensitivity 3mA
Package: SOT-223, SMBflat-3L Type
Manufacturer: STMicroelectronics
See the preview image and the PDF file for more information.
Image:
Z0103MN, Z0103MUF is marked Z3M
Description
The Z01 series is suitable for general purpose AC switching applications. These devices are typically used in applications such as home appliances (electrovalve, pump, door lock, small lamp control), fan speed controllers,… Different gate current sensitivities are available, allowing optimized performance when driven directly through microcontrollers.
Key Features
- Bidirectional AC switch (TRIAC)
- High blocking voltage: 600V
- On-state RMS current: 1A
- Low gate trigger current (sensitive gate type)
- Suitable for direct MCU drive (with proper resistor network)
- Compact package (commonly TO-92 or SOT-223 depending on variant)
Ordering Information
Z3M Features
1. On-state rms current, IT(RMS) 1 A
2. Repetitive peak off-state voltage, VDRM/VRRM 600 or 800 V
3. Triggering gate current, IGT (Q1)3 to 25 mA
Design Considerations
- Gate Drive: Can be driven directly by MCU GPIO via resistor (ensure IGT is met)
- Isolation: Use opto-triac (e.g., MOC30xx) for safety in mains applications
- Snubber Network: RC snubber (e.g., 100Ω + 100nF) recommended for inductive loads
- dV/dt Sensitivity: High dV/dt may cause false triggering → snubber or proper layout required
- Thermal: Limited to low-power loads (~100–200W typical depending on cooling)
Selection Guidance
- Use Z3M for low-current AC loads (<1A)
- Choose higher current TRIAC (e.g., BT136, BTA16) for heavier loads
- Select sensitive gate versions for direct MCU interfacing
- Ensure adequate voltage margin for mains (600V suitable for 220VAC systems)
Alternative / Equivalent Parts
- Z0103 / Z0107 series
- BT131 (1A class TRIAC)
- MAC97A6
- BT136 (higher current alternative)
Typical Applications
- Home appliance control (electrovalves, pumps, door locks)
- Small lamp dimmers
- Fan speed controllers
- Heater control (low power)
- AC load switching via MCU
Z3M Datasheet
