MDR din rail switching model power supply

Q: What is the difference between a contactor and a relay?

A contactor is built for switching power circuits repeatedly at high current, often with motor duty ratings (AC-3) and arc-suppressing chambers. A relay switches control signals at low current. In practice: contactor for the motor, relay in the control circuit that drives the contactor coil.

Q: How do I calculate the correct contactor size for a motor?

Use the motor's full-load current, apply the AC-3 rating for the operating voltage, and allow for the number of starts per hour. As a rule of thumb, the contactor's AC-3 rating should be at least equal to the motor FLC, then step up one frame if the duty is heavy.

Q: Do you supply the coil voltage I need?

Coil voltages are specified per order. Send the model number, coil voltage and frequency you require and we will confirm availability and lead time.

Q: Are auxiliary contacts included?

Base models come with the standard auxiliary contact configuration for that frame. Add-on auxiliary blocks and mechanical interlocks can be quoted with the contactor.

About the MDR din rail switching model power supply

The MDR din rail switching model power supply is part of the ELEHPD MDR-Series range. MDR din rail switching model power supply from the ELEHPD MDR-Series range. ELEHPD manufactures and exports low voltage electrical products from Yueqing, Zhejiang, China, supplying distributors, panel builders, M&E contractors and OEM buyers worldwide.

Full catalogue description: MDR din rail switching model 12v 24v power supply 100w

Typical applications

Motor control centres and pump or fan starters
Machine building, conveyors, packaging and CNC equipment
HVAC control panels and building automation
Water treatment, irrigation and pumping stations
Panel retrofits replacing electromechanical control gear

How to specify the right MDR-Series

Size the contact rating for the inductive load, not just the resistive current (AC-3 duty for motors)
Check the coil voltage and frequency available in the panel: 24 V DC, 110 V, 230 V or 400 V AC
Confirm the auxiliary contact count needed for the control and indication circuit
Match the enclosure rating to the environment (IP20 inside a panel, IP65 on the machine)

Specifications

MDR din rail switching model 12v 24v power supply 100w

Model	MDR-100-12	MDR-100-124	MDR-100-48
output	DC voltage	12V	24V	48V
Voltage tolerance	±2%	±1%	±1%
Rated current	7.5A	4A	2A
Current range	0~7.5A	0~4A	0~2A
Rated power	95.5W	96.5W	100W
Ripple&noise	120mvp-p	150mvp-p	200mvp-p
DCvoltage ADJ.range	-9%~+10%	±10%	±10%
input	Voltage range	90~264VAC,127~373VDC
frequency	47~63HZ
AC current	1.2A/110VAC,0.65A/220VAC
efficiency	85%	86%	87%
Inrush current	Cold start current 25A/115VAC,50A/230VAC
Leakage current	< 1mA/240VAC
protection	Over load	Rated output power105%~150% start over load protection
protection type:hiccup mode,auto-recovery after fault condition is removed
over voltage	6.8~8.2V	15.6~17.8V	30.6~33.2V
protection type:cut off output voltage,diode clamp
environment	Working temp,humidity	-20°C~+60°C,20%~90%RH
Storagetemp,humidity	-40°C~+85°C,10%~95%RH non-condensing
Withstand vibration	10~500HZ,2G 10min/1cycle,period for 60 minutes,each axes
safety	Withstand voltage	I/P-O/P:3KVAC I/P-FG:1.5KVAC O/P-FG:0.5KVAC
Isolated resistance	I/P-O/P,I/P-FG,O/P-FG:100M ohms/500VDC
Fitstandard	Safety standard	Fit UL1012
EMC standard	comply with EN55022,CLASSA
others	Dimension	789356mm (LWH)
Weight/packing	0.3kg/45pcs/13.2KG
note	1. All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25°C of ambient temperature. 2. Ripple & noise are measured at 20MHz of bandwidth by using a 12" twisted pair-wire terminated with a 0.1uf & 47uf parallel capacitor. 3. Tolerance : includes set up tolerance, line regulation and load regulation.

Frequently asked questions about the MDR din rail switching model power supply

What is the difference between a contactor and a relay?

A contactor is built for switching power circuits repeatedly at high current, often with motor duty ratings (AC-3) and arc-suppressing chambers. A relay switches control signals at low current. In practice: contactor for the motor, relay in the control circuit that drives the contactor coil.

How do I calculate the correct contactor size for a motor?

Use the motor's full-load current, apply the AC-3 rating for the operating voltage, and allow for the number of starts per hour. As a rule of thumb, the contactor's AC-3 rating should be at least equal to the motor FLC, then step up one frame if the duty is heavy.

Do you supply the coil voltage I need?

Coil voltages are specified per order. Send the model number, coil voltage and frequency you require and we will confirm availability and lead time.

Are auxiliary contacts included?

Base models come with the standard auxiliary contact configuration for that frame. Add-on auxiliary blocks and mechanical interlocks can be quoted with the contactor.