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Robust safety limit switch with metallic housing.
Certified with direct opening mechanism for both slow action and snap action types.
[Features]
· Direct opening mechanism (only at NC contact side) that opens the contact when an abnormality occurs in contact welding, etc.
· Realized a safety lever setting by using a mechanism where the lever is interlocked with the operating position display board.
· Also equipped with proper operation zone display mechanism.
· Single-action switching between left and right operation directions.
· The sealing structure of the head is reinforced to improve sealing properties (TÜV: IEC IP67, UL: NEMA3, 4, 4X, 6P, 13).
Part Number
Configured Part Number is shown.


*The dimensional tolerance for the parts not specified in the drawings of each model above is +/- 0.4 mm.
*1. By reversing the set position indicator plate, the lever can be fixed in any desired position.
*2. Due to the mechanism, this is a general limit switch, not a safety limit switch.

| Protective structure*1 | IP67 (EN60947-5-1) | |
|---|---|---|
| Durability*2 | Mechanical | Over 30 million operations (snap action), over 10 million operations (slow action) |
| Electrical | 500,000 operations or more (250 V AC 10 A resistive load) | |
| Allowable operation speed | 1 mm to 0.5 m/s | |
| Allowable operation frequency | Mechanical | 120 times/min |
| Electrical | 30 times/min | |
| Contact resistance | 25 mΩ or less | |
| Minimum applicable load*3 | 5 V DC 180 mA resistive load (N level reference value) | |
| Rated insulation voltage (Ui) | 600 V (EN60947-5-1) | |
| Rated frequency | 50/60 Hz | |
| Appliance Class | Class I (with earth terminal) | |
| Pollution degree (operating environment) | Pollution degree 3 (EN60947-5-1) | |
| Impulse withstand voltage (EN60947-5-1) | Between terminals of the same polarity | 2.5 kV (snap action) / 4 kV (slow action) |
| Between different pole terminals | 4 kV (Slow action) | |
| Between each terminal and earth | 4 kV | |
| Insulation resistance | 100 MΩ or more between same pole terminals, and between terminals and non-live metal part (500 V DC, insulation resistance tester) | |
| Contact gap | Minimum 2 x 2 mm (slow action), minimum 2 x 0.5 mm (snap action) | |
| Vibration | Malfunction | 10 to 55 Hz, Half amplitude 0.75 mm |
| Impact | Endurance | 1,000 m/s2 or more |
| Malfunction | 300 m/s2 or more | |
| Conditional short circuit current | 100 A (EN60947-5-1) | |
| Conventional enclosed thermal current (Ithe) | 20 A (EN60947-5-1) | |
| Operating ambient temperature | -40 to +80°C (no freezing) | |
| Operating Ambient Humidity | 95% RH or less | |
| Weight | Approximately 250 g | |
*1. The values given above are initial values.
2. Depending on the model, the above contents may differ.
*1. This protective structure is based on test methods according to the standard (EN60947-5-1). Please confirm the sealing performance in advance under the actual operating environment and usage conditions.
*2. The durability conditions are based on an ambient temperature of 5 to 35°C and an ambient humidity of 40 to 70% RH.
*3. This value may vary depending on the switching frequency, environmental conditions, and reliability level. Please check with the actual load in advance.
| Part Number | Standard Unit Price | Minimum order quantity | Volume Discount | Days to Ship | Detector Shape | Environment | Plunger Shape Type | Roller Lever Shape Type | Lever Shape Type | Acquired Standards | Force Required for Push Side O.F. (N) | Motion to Switching P.T. (mm) | Angle to Switching P.T (deg) | Max. Stroke T.T (mm) | Max. Angle T.T (deg) | Contact Type | Mechanical Life (10,000 times) | Rated Operating Voltage (V) | Rated Conductance Current (A) | Main Body External Dimension, Width W (mm) | Main Body External Dimension, Height H (mm) | Main Body External Dimension, Length L (mm) | Lever Length R (mm) | Detector Element Details | Movement After the Operation OT (mm) | Operating Position OP (mm) | Conduit Size | Specification of Terminal | Details Type | O.D. | Mounting System | Direction of Operation | Roller Type | Contact format | Built-in Switch Specification | AC Rated Voltage | Note |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
MYR 264.06 | 1 Piece(s) | 5 Day(s) or more | Roller Lever Type (rotation) | Standard / Cold Resistance | - | Standard | - | TUV / UL / C-UL / CE / GB(CCC) / CQC / CSA / EN | 9.41 | - | 21±3° | - | 75 | Mutual insulation double-throw | 1000 | DC30V or Less / DC125V / DC250V / AC100/125V / AC240/250V / More than AC300V | 10 | 40 | 43 | 99.5 | 31.5 | Roller lever type (resin roller) | - | - | G1/2 (PF1/2) | Ground terminal included | 1 Conduit Shape | φ17.5×6.6 | Front mounting | Slow action | Plastic Rollers | 2NC | 2NC contact (slow-action) | 125 / 250 / 400 | - | ||
MYR 283.37 | 1 Piece(s) | 5 Day(s) or more | Roller Lever Type (rotation) | Standard / Cold Resistance | - | Standard | - | TUV / UL / C-UL / CE / GB(CCC) / CQC / CSA / EN | 9.41 | - | 21±3° | - | 75 | Mutual insulation double-throw | 1000 | DC30V or Less / DC125V / DC250V / AC100/125V / AC240/250V / More than AC300V | 10 | 40 | 43 | 99.5 | 31.5 | Roller lever type (stainless steel roller) | - | - | G1/2 (PF1/2) | Ground terminal included | 1 Conduit Shape | φ17.5×7 | Front mounting | Slow action | Stainless Steel Roller | 2NC | 2NC contact (slow-action) | 125 / 250 / 400 | - | ||
MYR 325.93 | 1 Piece(s) | 5 Day(s) or more | Roller Lever Type (rotation) | Standard / Cold Resistance | - | Variable Roller Levers | - | TUV / UL / C-UL / CE / GB(CCC) / CQC / CSA / EN | 9.41 | - | 21±3° | - | 75 | Mutual insulation double-throw | 1000 | DC30V or Less / DC125V / DC250V / AC100/125V / AC240/250V / More than AC300V | 10 | 40 | 43 | 99.5 | 25-89 | Variable roller lever type | - | - | G1/2 (PF1/2) | Ground terminal included | 1 Conduit Shape | φ19×7 | Front mounting | Slow action | Plastic Rollers | 2NC | 2NC contact (slow-action) | 125 / 250 / 400 | - | ||
MYR 337.51 | 1 Piece(s) | 5 Day(s) or more | Plunger Type | Standard / Cold Resistance | [Roller Plungers] Roller Plunger | - | The Horizontal one way roller | TUV / UL / C-UL / CE / GB(CCC) / CQC / CSA / EN | 18.63 | 2 | - | 7 | - | Mutual insulation double-throw | 1000 | DC30V or Less / DC125V / DC250V / AC100/125V / AC240/250V / More than AC300V | 10 | 40 | 43 | 97 | - | Top roller plunger type | 5 | 48±1 | G1/2 (PF1/2) | Ground terminal included | 1 Conduit Shape | φ12.7×4.8 | Front mounting | Slow action | Stainless Steel Sintering Roller | 2NC | 2NC contact (slow-action) | 125 / 250 / 400 | - | ||
MYR 330.26 | 1 Piece(s) | 5 Day(s) or more | Roller lever type | Standard | - | - | - | TUV / UL / C-UL / CE / GB(CCC) / CSA / EN | - | - | - | - | - | - | 1000 | - | 10 | - | - | - | - | Roller lever type (resin roller) | - | - | M20 | - | 1-conduit type | - | - | - | - | - | 2NC contact (slow-action) | 125 / 250 / 400 | - | ||
MYR 327.33 | 1 Piece(s) | 5 Day(s) or more | Roller lever type | Standard | - | - | - | TUV / UL / C-UL / CE / GB(CCC) / CSA / EN | - | - | - | - | - | - | 1000 | - | 10 | - | - | - | - | Variable roller lever type | - | - | M20 | - | 1-conduit type | - | - | - | - | - | 2NC contact (slow-action) | 125 / 250 / 400 | - | ||
MYR 379.78 | 1 Piece(s) | 5 Day(s) or more | Plunger Type | Standard | Push Plunger | - | - | TUV / UL / C-UL / CE / GB(CCC) / CSA / EN | - | - | - | - | - | - | 1000 | - | 10 | - | - | - | - | Top plunger type | - | - | M20 | - | 1-conduit type | - | - | - | - | - | 2NC contact (slow-action) | 125 / 250 / 400 | - | ||
MYR 421.06 | 1 Piece(s) | 5 Day(s) or more | Plunger Type | Standard | [Roller Plungers] Roller Plunger | - | - | TUV / UL / C-UL / CE / GB(CCC) / CSA / EN | - | - | - | - | - | - | 1000 | - | 10 | - | - | - | - | Top roller plunger type | - | - | M20 | - | 1-conduit type | - | - | - | - | - | 2NC contact (slow-action) | 125 / 250 / 400 | - | ||
MYR 244.74 | 1 Piece(s) | 2 Day(s) or more | Roller Lever Type (rotation) | Standard / Cold Resistance | - | Standard | - | TUV / UL / C-UL / CE / GB(CCC) / CQC / CSA / EN | 9.41 | - | 21±3° | - | 75 | 2-circuit Double-break | 3000 | DC30V or Less / DC125V / DC250V / AC100/125V / AC240/250V / More than AC300V | 10 | 40 | 43 | 99.5 | 31.5 | Roller lever type (resin roller) | - | - | G1/2 (PF1/2) | Ground terminal included | 1 Conduit Shape | φ17.5×6.6 | Front mounting | Snap Action | Plastic Rollers | 1NC/1NO | 1NC/1NO contact (snap-action) | 125 / 250 / 400 | - | ||
MYR 264.06 | 1 Piece(s) | 2 Day(s) or more | Roller Lever Type (rotation) | Standard / Cold Resistance | - | Standard | - | TUV / UL / C-UL / CE / GB(CCC) / CQC / CSA / EN | 9.41 | - | 21±3° | - | 75 | 2-circuit Double-break | 3000 | DC30V or Less / DC125V / DC250V / AC100/125V / AC240/250V / More than AC300V | 10 | 40 | 43 | 99.5 | 31.5 | Roller lever type (stainless steel roller) | - | - | G1/2 (PF1/2) | Ground terminal included | 1 Conduit Shape | φ17.5×7 | Front mounting | Snap Action | Stainless Steel Roller | 1NC/1NO | 1NC/1NO contact (snap-action) | 125 / 250 / 400 | - | ||
MYR 275.64 | 1 Piece(s) | 5 Day(s) or more | Roller Lever Type (rotation) | Standard / Cold Resistance | - | Variable Roller Levers | - | TUV / UL / C-UL / CE / GB(CCC) / CQC / CSA / EN | 9.41 | - | 21±3° | - | 75 | 2-circuit Double-break | 3000 | DC30V or Less / DC125V / DC250V / AC100/125V / AC240/250V / More than AC300V | 10 | 40 | 43 | 99.5 | 25-89 | Variable roller lever type | - | - | G1/2 (PF1/2) | Ground terminal included | 1 Conduit Shape | φ19×7 | Front mounting | Snap Action | Plastic Rollers | 1NC/1NO | 1NC/1NO contact (snap-action) | 125 / 250 / 400 | - | ||
MYR 342.61 | 1 Piece(s) | 5 Day(s) or more | Roller lever type | Standard | - | - | - | TUV / UL / C-UL / CE / GB(CCC) / CSA / EN | - | - | - | - | - | - | 3000 | - | 10 | - | - | - | - | Variable rod lever type | - | - | G1/2 (PF1/2) | - | 1-conduit type | - | - | - | - | - | 1NC/1NO contact (snap-action) | 125 / 250 / 400 | BY JPN | ||
MYR 221.50 | 1 Piece(s) | 5 Day(s) or more | Plunger Type | Standard / Cold Resistance | Push Plunger | - | - | TUV / UL / C-UL / CE / GB(CCC) / CQC / CSA / EN | 18.63 | 2 | - | 7 | - | 2-circuit Double-break | 3000 | DC30V or Less / DC125V / DC250V / AC100/125V / AC240/250V / More than AC300V | 10 | 40 | 43 | 97 | - | Top plunger type | 5 | 35±1 | G1/2 (PF1/2) | Ground terminal included | 1 Conduit Shape | φ9.2 | Front mounting | Snap Action | - | 1NC/1NO | 1NC/1NO contact (snap-action) | 125 / 250 / 400 | - | ||
MYR 252.47 | 1 Piece(s) | 1 Day(s) or more | Plunger Type | Standard / Cold Resistance | [Roller Plungers] Roller Plunger | - | The Horizontal one way roller | TUV / UL / C-UL / CE / GB(CCC) / CQC / CSA / EN | 18.63 | 2 | - | 7 | - | 2-circuit Double-break | 3000 | DC30V or Less / DC125V / DC250V / AC100/125V / AC240/250V / More than AC300V | 10 | 40 | 43 | 97 | - | Top roller plunger type | 5 | 48±1 | G1/2 (PF1/2) | Ground terminal included | 1 Conduit Shape | φ12.7×4.8 | Front mounting | Snap Action | Stainless Steel Sintering Roller | 1NC/1NO | 1NC/1NO contact (snap-action) | 125 / 250 / 400 | - | ||
MYR 256.33 | 1 Piece(s) | 5 Day(s) or more | Roller Lever Type (rotation) | Standard / Cold Resistance | - | Standard | - | TUV / UL / C-UL / CE / GB(CCC) / CQC / CSA / EN | 9.41 | - | 21±3° | - | 75 | Mutual insulation double-throw | 1000 | DC30V or Less / DC125V / DC250V / AC100/125V / AC240/250V / More than AC300V | 10 | 40 | 43 | 99.5 | 31.5 | Roller lever type (resin roller) | - | - | G1/2 (PF1/2) | Ground terminal included | 1 Conduit Shape | φ17.5×6.6 | Front mounting | Slow action | Plastic Rollers | 1NC/1NO | 1NC/1NO contact (slow-action) | 125 / 250 / 400 | - | ||
MYR 379.78 | 1 Piece(s) | 5 Day(s) or more | Plunger Type | Standard | [Roller Plungers] Roller Plunger | - | - | TUV / UL / C-UL / CE / GB(CCC) / CSA / EN | - | - | - | - | - | - | 1000 | - | 10 | - | - | - | - | Top roller plunger type | - | - | G1/2 (PF1/2) | - | 1-conduit type | - | - | - | - | - | 1NC/1NO contact (slow-action) | 125 / 250 / 400 | - | ||
MYR 339.81 | 1 Piece(s) | 5 Day(s) or more | Roller lever type | Standard | - | - | - | TUV / UL / C-UL / CE / GB(CCC) / CSA / EN | - | - | - | - | - | - | 3000 | - | 10 | - | - | - | - | Roller lever type (stainless steel roller) | - | - | M20 | - | 1-conduit type | - | - | - | - | - | 1NC/1NO contact (snap-action) | 125 / 250 / 400 | - | ||
MYR 275.64 | 1 Piece(s) | 5 Day(s) or more | Roller Lever Type (rotation) | Standard / Cold Resistance | - | Variable Roller Levers | - | TUV / UL / C-UL / CE / GB(CCC) / CQC / CSA / EN | 9.41 | - | 21±3° | - | 75 | 2-circuit Double-break | 3000 | DC30V or Less / DC125V / DC250V / AC100/125V / AC240/250V / More than AC300V | 10 | 40 | 43 | 99.5 | 25-89 | Variable roller lever type | - | - | M20 | Ground terminal included | 1 Conduit Shape | φ19×7 | Front mounting | Snap Action | Plastic Rollers | 1NC/1NO | 1NC/1NO contact (snap-action) | 125 / 250 / 400 | - | ||
MYR 277.05 | 1 Piece(s) | 5 Day(s) or more | Roller lever type | Standard | - | - | - | TUV / UL / C-UL / CE / GB(CCC) / CSA / EN | - | - | - | - | - | - | 3000 | - | 10 | - | - | - | - | Variable rod lever type | - | - | M20 | - | 1-conduit type | - | - | - | - | - | 1NC/1NO contact (snap-action) | 125 / 250 / 400 | - | ||
MYR 276.60 | 1 Piece(s) | 5 Day(s) or more | Plunger Type | Standard | Push Plunger | - | - | TUV / UL / C-UL / CE / GB(CCC) / CSA / EN | - | - | - | - | - | - | 3000 | - | 10 | - | - | - | - | Top plunger type | - | - | M20 | - | 1-conduit type | - | - | - | - | - | 1NC/1NO contact (snap-action) | 125 / 250 / 400 | - | ||
MYR 253.87 | 1 Piece(s) | 5 Day(s) or more | Plunger Type | Standard | [Roller Plungers] Roller Plunger | - | - | TUV / UL / C-UL / CE / GB(CCC) / CSA / EN | - | - | - | - | - | - | 3000 | - | 10 | - | - | - | - | Top roller plunger type | - | - | M20 | - | 1-conduit type | - | - | - | - | - | 1NC/1NO contact (snap-action) | 125 / 250 / 400 | - | ||
MYR 322.01 | 1 Piece(s) | 5 Day(s) or more | Roller lever type | Standard | - | - | - | TUV / UL / C-UL / CE / GB(CCC) / CSA / EN | - | - | - | - | - | - | 1000 | - | 10 | - | - | - | - | Roller lever type (resin roller) | - | - | M20 | - | 1-conduit type | - | - | - | - | - | 1NC/1NO contact (slow-action) | 125 / 250 / 400 | - | ||
MYR 268.64 | 1 Piece(s) | 5 Day(s) or more | Lever Shape (push) | Standard / Cold Resistance | - | Standard | - | TUV / UL / CE / GB(CCC) / CSA / EN | 9.41 | - | 21±3° | - | 75 | - | 1000 | DC125V / DC250V / AC100/125V / AC240/250V / More than AC300V | - | - | - | - | - | Roller lever type (stainless steel roller) | - | - | M20 | - | 1 Conduit Shape | - | - | - | - | 1NC/1NO | 1NC/1NO contact (slow-action) | 250 / 125 / 400 | - | ||
MYR 375.68 | 1 Piece(s) | 5 Day(s) or more | Roller lever type | Standard | - | - | - | TUV / UL / C-UL / CE / GB(CCC) / CSA / EN | - | - | - | - | - | - | 1000 | - | 10 | - | - | - | - | Variable roller lever type | - | - | M20 | - | 1-conduit type | - | - | - | - | - | 1NC/1NO contact (slow-action) | 125 / 250 / 400 | - | ||
MYR 308.02 | 1 Piece(s) | 5 Day(s) or more | Plunger Type | Standard | [Roller Plungers] Roller Plunger | - | - | TUV / UL / C-UL / CE / GB(CCC) / CSA / EN | - | - | - | - | - | - | 1000 | - | 10 | - | - | - | - | Top roller plunger type | - | - | M20 | - | 1-conduit type | - | - | - | - | - | 1NC/1NO contact (slow-action) | 125 / 250 / 400 | - |
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| Main Body Size | Standard | Operating Temperature Range(°C) | -40::80 | Protection Structure | IP67 |
|---|---|---|---|---|---|
| Mechanical Operation Frequency(times/min or Less) | 120 | DC Rated Voltage | 8 / 14 / 30 / 125 / 250 |
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