China Top Switch Mode Power Supply Manufacturer & Exporter

DIN Rail units (such as our 240W, NDR, HDR, and EDR series) are specifically engineered for tool-less mounting on standard TS-35/7.5 or TS-35/15 control rails. They feature rugged, touch-safe screw terminal blocks, integrated chassis grounding, and vertical convection thermal cooling, making them the standard choice for PLC control cabinets, motor drive racks, and process automation. In contrast, Enclosed cage supplies (such as the LRS and S-series) feature a low-profile perforated metal chassis designed for chassis or screw-plate installation inside machines, CNC beds, 3D printers, or commercial LED signage where clearance is limited and cost per watt must be maximized.

For purely resistive loads (such as LED lighting strips or heating elements), we recommend maintaining a conservative 20% to 25% safety overhead above the continuous operating draw. However, inductive loads (such as DC motors, solenoids, contactors, and capacitive pumps) draw instantaneous inrush currents 200% to 400% higher than their steady-state ratings. In these setups, either select an SMPS with an integrated peak load capability (such as our DRP or EDR series offering 150% peak load buffers for 3 seconds) or calculate the power supply rating based on the transient peak demand to avoid triggering premature Over-Current Protection (OCP) hiccup shutdowns.

All standard Keldan power converters incorporate complete four-fold internal protection matrices: Short Circuit Protection (SCP) with continuous hiccup mode and auto-recovery; Overload Protection (OLP) kicking in between 105% and 150% rated output via constant current limiting; Over Voltage Protection (OVP) clamp zener and crowbar circuits; and Over Temperature Protection (OTP) with automatic thermal cutoff that shuts down PWM switching when heat sink sensors exceed calibrated safe thresholds (typically 85°C internal junction).

Yes. Series connection to elevate overall DC voltage (e.g., placing two 24V units in series to produce a 48V DC bus) is fully supported, provided reverse-bias diodes are placed across output terminals to prevent reverse voltage breakdown during start-up. For parallel connection (redundancy or higher current), models equipped with current-sharing circuits or external OR-ing diodes/redundancy modules (such as our DR-RDN20 series) should be deployed to prevent circulating currents caused by fractional millivolt imbalances between units.

Our in-house R&D team accommodates custom modifications across mechanical and electrical domains. Electrical options include non-standard voltage trims (e.g., 36V, 60V, or dual +15V/-15V outputs), military-spec conformal coating for corrosive humid environments, custom inrush current thermistors, and widened input AC voltage bands (e.g., 65-300VAC). Mechanical customization covers custom metal tooling, silk-screened client branding, colored housings, and diverse plug-in wiring terminal standards.

Standard off-the-shelf samples (1 to 5 pieces) ship within 48 to 72 hours via international air couriers (DHL, FedEx, UPS). Batch OEM production lead times average 12 to 20 business days depending on volume and customization depth. All shipments include individual serial numbers, burn-in factory test certificates, and comprehensive packing lists configured for seamless maritime or air customs entry.