The part number **NT90RHASAC110VCF0.6** refers to a high-power electromagnetic relay, typically manufactured by companies like **NHG (Ningbo Huaguan)**. These relays are designed for heavy-duty switching in industrial and domestic appliances. --- ### 1. Breakdown of the Part Number The alphanumeric string defines the specific electrical and physical characteristics of the relay: | Segment | Meaning | Specification | | :--- | :--- | :--- | | **NT90** | Series Model | T90 style relay (Power Relay) | | **R** | Terminal Type | PCB + Quick Connect (Flanged) | | **H** | Contact Form | 1 Form A (Normally Open) | | **A** | Sealing | Sealed type (Wash tight) | | **S** | Contact Material | Silver Alloy (AgSnO2) | | **AC110V** | Coil Voltage | 110 Volts Alternating Current | | **C** | Contact Rating | High capacity (typically 30A/40A) | | **F** | Insulation Class | Class F (155°C) | | **0.6** | Coil Power | 0.6VA (Power consumption) | --- ### 2. Key Technical Specifications Based on the standard NT90 series data, here are the primary electronic parameters: #### **Contact Side (Output)** - **Max Switching Current:** 30A to 40A (depending on the specific load type). - **Max Switching Voltage:** 250VAC / 30VDC. - **Contact Resistance:** $\leq 50m\Omega$. - **Life Expectancy:** 100,000 operations (Electrical); 10,000,000 (Mechanical). #### **Coil Side (Input)** - **Nominal Voltage:** 110V AC. - **Pick-up Voltage:** $\leq 80\%$ of nominal voltage. - **Drop-out Voltage:** $\geq 30\%$ of nominal voltage. - **Power Consumption:** 0.6VA to 2VA depending on the specific AC frequency/winding. --- ### 3. Physical Features & Construction * **Housing:** Large, "Sugar Cube" or "T-Shape" heavy-duty plastic casing. * **Terminals:** This specific model usually features dual-purpose terminals. The bottom has pins for **PCB mounting**, while the top has "Faston" tabs for **quick-connect** spade lugs to handle high current. * **Insulation:** Rated Class F, allowing it to operate in high-temperature environments (up to 155°C internal coil temperature). --- ### 4. Typical Applications Due to its high current rating and 110V AC coil, this relay is commonly found in: 1. **HVAC Systems:** Controlling compressors or fan motors. 2. **Industrial Controls:** Switching heavy solenoids or heaters. 3. **Power Supplies:** Main power cut-off or UPS switching. 4. **Domestic Appliances:** Large washing machines or water heaters.