• Lineup includes three contact models with 2NC/1NO and 3NC contact forms and MBB models in addition to the previous contact forms 1NC/1NO, and 2NC
  • M12-connector models are available, saving on labor and simplifying replacement.
  • Applicable to both standard loads and microloads.
  • Variety of metallic heads available.

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Product Description

Introducing OMRON’s D4NS and D4NS-SK series: versatile safety-door switches catering to diverse industrial needs. With various contact models and M12-connector options, installation is simplified, saving on labor. These switches are compatible with standard and microloads, offering flexibility, while the range of metallic heads ensures durability in any environment.

Standards and EC Directives

Conforms to the following EC Directives:

• Machinery Directive
• Low Voltage Directive
• EN50047
• EN60947-5-1
• EN ISO 14119
• GS-ET-15

Certified Standards


Certification body Standard File No.
TÜV SÜD EN60947-5-1
(certified direct opening)
Consult your OMRON representative for details.
UL *1 UL508, CSA C22.2 No.14 E76675
CQC (CCC) GB/T 14048.5 Consult your OMRON representative for details.
KOSHA *2 EN60947-5-1 Consult your OMRON representative for details.


*1. Certification for CSA C22.2 No. 14 is authorized by the UL mark.
*2. Only certain models have been certified.

Certified Standard Ratings

TÜV (EN60947-5-1), CCC (GB/T 14048.5)


Utilization category AC-15 DC-13
Rated operating current (Ie) 3 A 0.27 A
Rated operating voltage (Ue) 240 V 250 V


Note: Use a 10 A fuse type gI or gG that conforms to IEC60269 as a short-circuit protection device. This fuse is not built
into the Switch.


UL/CSA (UL508, CSA C22.2 No. 14)



Rated voltage Carry current Current (A) Volt-amperes (VA)
Make Break Make Break
120 VAC 10 A 60 6 7,200 720
240 VAC 30 3




Rated voltage Carry current Current (A) Volt-amperes (VA)
Make Break Make Break
125 VDC 2.5 A 0.55 0.55 69 69
250 VDC 0.27 0.27




Interlock type Type 2 (EN ISO 14119)
Coding level Low level coded (EN ISO 14119)
Degree of protection *1 IP67 (EN60947-5-1)
Durability *2 Mechanical Standard type: 1,000,000 operations min.
High pull-force type: 100,000 operations min.
Electrical Standard type:
500,000 operations min. (3 A resistive load at 250 VAC) *3
300,000 operations min. (10 A resistive load at 250 VAC)
High pull-force type:
100,000 operations min. (10 A resistive load at 250 VAC)
Operating speed 0.05 to 0.5 m/s
Direct opening force *4 Standard type: 60 N min.
High pull-force type: 80 N min.
Direct opening travel *4 10 mm min.
Contact resistance 25 mΩ max.
Minimum applicable load *5 1 mA resistive load at 5 VDC (N-level reference value)
Rated insulation voltage (Ui) 300 V
Rated frequency 50/60 Hz
Protection against electric shock Class II (double insulation) 1465_sp_5_1
Pollution degree (operating environment) 3 (EN60947-5-1)
Impulse withstand
voltage (Uimp)
Between terminals of same
2.5 kV
Between terminals of different
4 kV
Between each terminal and
non-current carrying metallic
6 kV
Insulation resistance 100 MΩ min.
Contact gap 2 × 2 mm min.
Vibration resistance Malfunction 10 to 55 Hz, 0.75 mm single amplitude
Shock resistance Destruction 1,000 m/s2 min.
Malfunction 300 m/s2 min.
Conditional short-circuit current 100 A (EN60947-5-1)
Conventional free air thermal current (Ith) 10 A (EN60947-5-1)
Ambient operating temperature -30 to 70°C (with no icing)
Ambient operating humidity 95% max.
Weight Approx. 96 g (D4NS-1CF)


Note: 1. The above values are initial values.
2. The Switch contacts can be used with either standard loads or microloads. Once the contacts have been used to
switch a load, however, they cannot be used to switch smaller loads. The contact surfaces will become rough
once they have been used and contact reliability for smaller loads may be reduced.
*1. The degree of protection is tested using the method specified by the standard (EN60947-5-1). Confirm that sealing
properties are sufficient for the operating conditions and environment beforehand. Although the switch box is
protected from dust or water penetration, do not use the D4NS in places where foreign material may enter through the
key hole on the head, otherwise Switch damage or malfunctioning may occur.
*2. The durability is for an ambient temperature of 5 to 35°C and an ambient humidity of 40% to 70%. For more details,
consult your OMRON representative.
*3. Do not pass the 3 A, 250 VAC load through more than 2 circuits.
*4. These figures are minimum requirements for safe operation.
*5. This value will vary with the switching frequency, environment, and reliability level. Confirm that correct operation is
possible with the actual load beforehand.
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