This article focuses on the power pain points in AC voltage regulation systems and analyzes the core technological advantages of Huaxuanyang Electronics‘ bidirectional thyristor transistor (TRIAC). By comparing actual test data, quantifying the improvement effect of its 1.1V ultra-low conduction voltage drop (typical value) on system energy efficiency, and combining motor speed regulation and dimming circuit cases, this paper elaborates on its engineering value in reducing conduction loss, enhancing commutation capability (dv/dt), and simplifying heat dissipation design. The full text includes a loss calculation model and selection guide, providing engineers with a cost-effective solution that can be directly reused.

1. Technical principle: Energy saving mechanism with low conduction voltage drop

As an AC switching device, the conduction loss of a bidirectional thyristor (TriaC) is mainly determined by the conduction voltage drop (Vt):

P_conduction = Vt × I_T(rms) × D  

(D: conduction duty cycle, I2 (rms): effective value of on state current)

The Huaxuanyang BT138 series reduces the Vt to 1.1V (typical value), which is 35% lower than the 1.7V of the "A brand", directly reducing conduction loss.   

>Note: Switching loss is usually secondary in AC voltage regulation, and this article focuses on the dominant conduction loss.

2. Product advantages: measured parameters and reliability design

>Term description: The commutation capability (dv/dt) refers to the ability of a device to withstand the rate of voltage rise in the off state, and a high dv/dt can avoid misleading AC zero crossing.

3. Application case: Energy saving verification of 1200W heater pressure regulating system

Scenario: 220VAC input, 50% duty cycle voltage regulation, load current I2 (rms)=5.45A

Loss comparison calculation:

-A brand TRIAC loss: P1=1.7V × 5.45A × 0.5=4.63W

-Huaxuanyang Triac loss: P2=1.1V × 5.45A × 0.5=3.00W

Energy saving rate: η=(P1-P2)/P1 × 100%=35.2%

>Calculation conditions: pure resistive load, ignoring switch losses; Data source: Huaxuanyang Electronics BT138 series technical manual

4. Performance in multiple scenarios

The Huaxuanyang bidirectional thyristor achieves the following through 1.1V ultra-low conduction voltage drop (typical value) and 1000V/μ s commutation capability (minimum value):

1. Energy saving: Reduce conduction loss by more than 30%, significantly reducing system temperature rise

2. Reliability: High junction temperature and surge capability suitable for harsh industrial environments

3. Cost reduction: Heat sink volume reduced by 40%, BOM cost optimized

Applicable scenarios: Recommended for AC voltage regulation systems with a power output of ≥ 500W (such as industrial heating, variable frequency appliances, lighting control), especially for compact designs with limited heat dissipation space, it has significant value. For low-power scenarios (<500W), it is recommended to evaluate other devices (such as MOSFETs) to optimize costs.