Beijing Fuanshi Technology Co., Ltd.

Beijing Fuanshi Technology Co., Ltd. specialize in producing power regulator
thyristoy solid state relays over 18 years

26/05/2026

Technical Share: Why did that 200A SSR melt down on an inductive motor load?

26/05/2026

Technical Share: Why did that 200A SSR melt down on an inductive motor load?We often see buyers confused when a high-current SSR fails, even though the steady-state current is well within the specs. The culprit is usually the Load Type.AC-51 (Resistive Heating Loads): Safe and straightforward. A 1.5x current margin is usually enough.AC-53a (Inductive Motor Loads): Tricky. Industrial motors generate 5 to 7 times the inrush current upon startup, paired with heavy back-EMF ($dv/dt$).For inductive applications, you need built-in transient voltage protection (MOV) and heavy-duty RC snubber networks to absorb the stress. At Fuanshi, we engineer our 3-Phase 200A SSRs with extra safety headers to handle these exact spikes.Engineers, what safety margin factor do you normally apply when sizing SSRs for inductive switching?

19/05/2026

Why do generic Solid State Relays (SSRs) constantly burn out in high-ambient control cabinets?

19/05/2026

Why do generic Solid State Relays (SSRs) constantly burn out in high-ambient control cabinets?
When ambient temperatures inside an industrial enclosure hit 50°C+ (especially in regions like KSA or during heavy HVAC summer loads), thermal resistance ($R_{thjc}$) becomes the ultimate bottleneck. Standard copper-clad substrates simply cannot dissipate heat fast enough, leading to catastrophic junction breakdown.
At Fuanshi Technology, we solve this through material science. By implementing 0.6mm DBC (Direct Bonded Copper) ceramic substrates, we achieve ultra-low thermal resistance. This design ensures that even our heavy-duty 200A and 400A power modules maintain a stable thermal profile under 24/7 continuous industrial duty.
For electrical design managers and system integrators, protecting your control loop from voltage mutation doesn't have to mean paying premium prices for European brands. It’s about choosing components engineered for extreme conditions.
What is the maximum ambient temperature your control panels usually face in your current projects? Let's discuss in the comments. 👇

12/05/2026

Need accurate SSR quotation with technical parameter support?

12/05/2026

Need accurate SSR quotation with technical parameter support?We offer direct factory quotation for SSR & Thyristor modules with complete datasheets.
One-stop technical consultation and product matching service.
CTA: DM "SSR" | Ask for datasheet



21/04/2026

Principle of Power Saving of Power Regulator

21/04/2026

Principle of Power Saving of Power Regulator
The electric power regulator boasts multiple advantages including high efficiency, absence of mechanical noise and wear, spark-free operation, rapid response, compact size, and lightweight design. Comprising a trigger board, specialized heat sink, fuse, fan, and housing, this integrated device incorporates all control board functionalities.
By precisely regulating voltage, current, and power, it achieves accurate temperature control. Its advanced digital control algorithms further optimize energy utilization efficiency, playing a pivotal role in power conservation.
The energy-saving mechanism of power regulators is straightforward. Consider industrial electric heating circuits: they typically use AC contactors or solid-state relays to control heating elements. These devices operate intermittently, cycling between on and off states continuously at constant temperatures. When powered, these switches deliver full load current to the circuit, causing severe voltage surges and substantial power loss. In contrast, power regulators gradually increase current output before reaching maximum power, then slowly reduce it during shutdown.
# regulator market #

15/04/2026

What Is the Difference Between a power controller and a Solid-State Relay?

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Tongxian
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