Side-mounted float level switch contact capacity (divided into three types: micro-motion mechanical, reed switch, and explosion-proof intrinsically safe, industrial standard)
Side-mounted switches are available in two mechanisms: lever magnetic micro-switch (UQK side-mounted mechanical) and built-in reed magnetic switch. The contact capacity differs significantly, and all are SPDT single-pole double-throw (1 open, 1 closed) contacts.
I. Micro-switch type (lever side-mounted, commonly used in industry, high power)
AC: 250VAC, 5A (resistive load 1250VA), standard configuration; heavy-duty customization up to 250VAC/10A.
DC: 125VDC/0.4A, 220VDC/0.3A, 24VDC maximum 5A (small DC load).
Applications: Direct start/stop of water pumps, solenoid valves, water treatment, local control of tanks.
II. Reed Switch Type (Miniature Side-Mounted, Passive Signal Output, Small Capacity) Standard Model: AC220V/0.5A (50VA); DC24V/0.5A (12W), Maximum Capacity: AC240V/1A, DC200V/0.7A (50W).
Miniature Corrosion-Resistant PP Side-Mounted
Low Capacity: AC10VA, DC10W, AC≤0.3A, for PLC and indicator light signal circuits only.
Applications: Remote transmission of DI signals, alarm indicator lights. Directly powering high-power loads is strictly prohibited; intermediate relays must be added for capacity expansion.
III. Explosion-Proof/Intrinsically Safe Side-Mounted Dedicated Capacities
Explosion-Proof Exd Type: Same parameters as conventional micro-motion/reed switches, available in AC250V/5A and AC50VA specifications. Temperature limits on the casing must prevent overloading.
Intrinsically Safe Exia (Chemical Explosion-Proof Instruments): DC24V only, ≤0.5A, ≤10W. Do not connect to 220V high-voltage power.
IV. Selection and Usage Guidelines
**Resistive Loads (Indicator Lights, Intermediate Relays):** Select according to nominal capacity;
**Inductive Loads (Coils, Water Pumps):** Derating by 30%;
**Reed contacts should be used in conjunction with intermediate relays for high-power applications to avoid arcing and contact erosion;
**Low-Crystal/Liquid Nitrogen Applications:** Select low-capacity reed contacts: DC24V/0.3A is optimal.
Scan the QR code to receive more detailed information.
