Omron, MK-S(X) Series

• Switch a DC load of 220 VDC, 10 A (resistive load).

• Models for AC loads can switch 250 VAC, 15 A (resistive load).

• Lineup includes models with SPST-NO and SPST-NO/SPSTNC contact forms.

• Using a SPST-NO/SPST-NC contact form enables detecting contact welding. (When the NO contacts become welded, the NC contacts will maintain a minimum distance of 0.5 mm.)

• Models available with operation indicators and built-in test buttons.

• RoHS compliant.

• Standards: UL, IEC (TÜV certification)

Ratings

Operating Coil

Item		Rated current (mA)		Coil resistance (Ω)	Must operate voltage (V)	Must release voltage (V)	Maximum voltage allowable (V)	Power consumption (VA, W)
Rated voltage (V)		50 Hz	60 Hz	Coil resistance (Ω)	Percentage of rated voltage			Power consumption (VA, W)
AC	24	110	96.3	48.4	80% max.	30% min. at 60 Hz 25% min. at 50 Hz	110%	Approx. 2.3 VA at 60 Hz Approx. 2.7 VA at 50 Hz
	100	26.6	23.1	760
	110	24.2	21.0	932
	120	22.2	19.3	1,130
	200	13.3	11.6	3,160
	220	12.1	10.5	3,550
	230	11.5	10.0	4,250
	240	11.0	9.6	4,480
DC	12	126		95		15% min.		Approx. 1.5 W
	24	63.2		380
	48	32.0		1,500
	110	13.6		8,060
	220	6.8		32,200

Note: 1. The rated current and coil resistance are measured at a coil temperature of 23°C with tolerances of +15%/−20%
for AC rated current and ±15% for DC coil resistance.
    2. Performance characteristic data are measured at a coil temperature of 23°C.
       3. The maximum allowable voltage is the maximum value of the allowable voltage range for the operating power supply for the relay coil.There is no continuous allowance.
       4. The rated current is approximately 5 mA higher for Models with Built-in Operation Indicators (DC operating coils).

Contact Ratings for Models for DC Loads

Load		Resistive load	Inductive load		Resistive load	Inductive load
Load		Resistive load	L/R = 7 ms	DC13 class	Resistive load	L/R = 7 ms	DC13 class
Contact configuration	NO	Double-break			Double-break
Contact configuration	NC	---			Single-break
Contact material		AgSnIn			AgSnIn
Rated load	NO	10 A, 220 VDC	5 A, 220 VDC	0.4 A, 220 VDC	5 A, 220 VDC	3 A, 220 VDC	0.2 A, 220 VDC
Rated load	NC	---			2 A, 220 VDC	0.3 A, 220 VDC	0.1 A, 220 VDC
Rated carry current	NO	10 A			5 A
Rated carry current	NC	---			2 A
Max. switching voltage	NO	220 VDC			220 VDC
Max. switching voltage	NC	---			220 VDC
Max. switching current	NO	10 A	5 A	0.4 A	5 A	3 A	0.2 A
Max. switching current	NC	---			2 A	0.3 A	0.1 A
Max. switching capacity (reference value)	NO	2,200 W	---	---	1,100 W	---	---
Max. switching capacity (reference value)	NC	---			440 W	---	---

Note: If the L/R of an inductive load exceeds 7 ms with a Model for a DC Load, the arc interruption time must be less than approximately 50 ms to use the Relay. Design the circuit so that the arc interruption time is 50 ms or less.
* These values apply to a switching frequency of 30 times per minute.

Contact Ratings for Models for AC Loads

Contact form		SPST-NO	SPST-NO/SPST-NC
Model		MKS1T(I)(N)-10	MKS2T(I)(N)-11
Load		Resistive load	Resistive load
Contact configuration	NO	Double-break	Double-break
Contact configuration	NC	---	Single-break
Contact material		AgSnIn	AgSnIn
Rated load	NO	15 A, 250 VAC	15 A, 250 VAC
Rated load	NC	---	5 A, 250 VAC
Rated carry current	NO	15 A	15 A
Rated carry current	NC	---	5 A
Max. switching voltage	NO	250 VAC	250 VAC
Max. switching voltage	NC	---	250 VAC
Max. switching current	NO	15 A	15 A
Max. switching current	NC	---	5 A
Max. switching capacity (reference value)	NO	3,750 VA	3,750 VA
Max. switching capacity (reference value)	NC	---	1,250 VA

* These values apply to a switching frequency of 20 times per minute.

Characteristics

*Contact resistance 1**		100 mΩ max.
*Operate time 2**		AC: 20 ms max. DC: 30 ms max.
*Release time 2**		20 ms max.
Max. operating frequency	Mechanical	18,000 operations/h
Max. operating frequency	Rated load	Models for DC loads: 1,800 times/hour Models for AC loads: 1,200 times/hour
*Insulation resistance 3**		100 MΩ min.
Dielectric strength	Between coil and contacts	2,500 VAC 50/60 Hz for 1 min between
	Between contacts of different polarity	2,500 VAC 50/60 Hz for 1 min between
	Between contacts of same polarity	1,000 VAC 50/60 Hz for 1 min
Vibration resistance	Destruction	10 to 55 to 10 Hz, 0.75-mm single amplitude (1.5-mm double amplitude)
Vibration resistance	Malfunction	10 to 55 to 10 Hz, 0.50-mm single amplitude (1.0-mm double amplitude)
Shock resistance	Destruction	Back-connecting Socket (P7M-06P) mounting: 1,000 m/s² Front-connecting Socket (P7MF-06(-D)) mounting:500m/s²
Shock resistance	Malfunction	100 m/s²
Endurance	Mechanical	1,000,000 operations min. (at 18,000 operations/hr)
Endurance	*Electrical 4**	100,000 operations min. (at rated load and maximum switching frequency)
Failure rate P level (reference value)		10 mA at 24 VDC
Ambient operating temperature		-40 °C to 60 °C (with no icing or condensation) Note: The range is -25 °C to 60 °C for models with built-in operation indicators.
Ambient operating humidity		5% to 85%
Weight		SPST-NO: Approx. 73 g, SPST-NO/SPST-NC: Approx. 82 g

Note: The values given above are initial values.
*1. The contact resistance was measured for 1 A at 5 VDC using the voltage drop method.
*2. The operate time was measured with the rated voltage imposed and any contact bounce ignored at an ambient temperature of 23°C.
*3. The insulation resistance was measured with a 500-VDC insulation resistance tester at the same places as those used for checking the dielectric strength.
*4. The electrical endurance was measured at an ambient temperature of 23°C.

Approved Standards

UL508 (File No. E41515)

Model	Coil ratings	Contact ratings		Operations
MKS1XT[]-[]	12 to 220 VDC 24 to 240 VAC	NO contacts	10 A, 220 VDC (Resistive) 5 A, 220 VDC L/R (T_{_0.632}) = 7 ms 0.4 A, 220 VDC L/R (T_0.95) = 300 ms	6,000
MKS2XT[]-[]		NO contacts	5 A, 220 VDC (Resistive) 3 A, 220 VDC L/R (T_0.632) = 7 ms 0.2 A, 220 VDC L/R (T_0.95) = 300 ms
MKS2XT[]-[]		NC contacts	2 A, 220 VDC (Resistive) 0.3 A, 220 VDC L/R (T_0.632) = 7 ms 0.1 A, 220 VDC L/R (T_0.95) = 300 ms
MKS1T[]-[]		NO contacts	15 A, 250 VAC (Resistive)
MKS2T[]-[]		NO contacts	15 A, 250 VAC (Resistive)
MKS2T[]-[]		NC contacts	5 A, 250 VAC (Resistive)

CSA Standard: CSA Certification by : CSA C22.2 No.14
IEC Standard/TÜV Certification: IEC61810-1 (Certification No. R50104853)

Model	Coil ratings	Contact ratings		Operations
MKS1XT[]-[]	12, 24, 48, 110, 220 VDC 24, 100, 110, 120, 200, 220, 230, 240 VAC	NO contacts	DC-1: 10 A, 220 VDC 5 A, 220 VDC L/R (T_0.632) = 7 ms DC-13: 0.4 A, 220 VDC	100,000
MKS2XT[]-[]		NO contacts	DC-1: 5 A, 220 VDC 3 A, 220 VDC L/R (T_0.632) = 7 ms DC-13: 0.2 A, 220 VDC
MKS2XT[]-[]		NC contacts	DC-1: 2 A, 220 VDC 0.3 A, 220 VDC L/R (T_0.632) = 7 ms DC-13: 0.1 A, 220 VDC
MKS1T[]-[]		NO contacts	AC-1: 15 A, 250 VAC 50/60 Hz
MKS2T[]-[]		NO contacts	AC-1: 15 A, 250 VAC 50/60 Hz
MKS2T[]-[]		NC contacts	AC-1: 5 A, 250 VAC 50/60 Hz

General-purpose Relays

Models for DC Loads
Standard Models
MKS1XT-10, MKS2XT-11
Models with Built-in Operation Indicators
MKS1XTN-10, MKS2XTN-11

Models for AC Loads
Standard Models
MKS1T-10, MKS2T-11
Models with Built-in Operation Indicators
MKS1TN-10, MKS2TN-11

Models for DC Loads
Models with Test Button
MKS1XTI-10, MKS2XTI-11
Models with Test Button and Built-in Operation Indicators
MKS1XTIN-10, MKS2XTIN-11

Models for AC Loads
Models with Test Button
MKS1TI-10, MKS2TI-11
Models with Test Button and Built-in Operation Indicators
MKS1TIN-10, MKS2TIN-11

Connecting Socket

Back-connecting Socket
P7M-06P

Front-connecting Socket
P7MF-06
P7MF-06-D

Note: 1. The internal connections diagram is for the MKS2(X)T[][]-11.
2. The P7MF-06-D has polarity. Be careful to wire with the correct polarity.

Accessory (Order Separately)

Connecting Socket

Note: 1. The P7M-06P, P7MF-06, and P7MF-06-D can be used with models for DC loads with an SPST-NO or SPST-NO/
SPST-NC contact form or with models for AC loads with an SPST-NO or SPST-NO/SPST-NC contact form.
2. The P7MF-06-D has a built-in diode and can thus be used only with Relays with DC operating coils. Do not use
it with a Relay with an AC operating coil.
3. Refer to Gang Mounting on Catalog for the conditions required for gang mounting.

Relay Hold-down Clips

Use the Clips to securely mount the Relay and prevent it from falling due to vibration or shock.

PYC-A2
One Set (Two Clips)

Note: The minimum order for the PYC-A2 is ten clips.

Socket Mounting Height

P7M-06P

P7MF-06
P7MF-06-D

TITLE	DOCUMENT TYPE	SIZE
MK-S(X)	Catalog	1311 KB
Relay Defects Causes & Solutions (General-purpose Relay Edition)	Technical Guide	4100 KB