| Part Number: | C4B | - | 4 | 1 | 01 | N |
|---|---|---|---|---|---|---|
| Explanation: |
Series C4B - Vertical limit switch series |
Conduit 1 - Pg13.5, single conduit entry |
Contact 1 - 1NC+1NO, snap action |
Actuator 01 - Top plunger; NC direct opening |
Version N - Fixed suffix identifying the C4B-N version |
C4B-N vertical limit switches provide a single conduit entry, Class I construction with a ground terminal and thirteen actuator styles. The C4B-41…N models below use an M20 entry and snap-action 1NC+1NO contacts. The ordering system also identifies Pg13.5 entries and slow-action contact options; specify the required combination when ordering.
Direct opening is limited to the NC contacts and actuator codes identified in the selection table. Spring and whisker heads do not have this function. Use the contact configuration, approach direction and required operating travel together when selecting a model.
C4B-4101N comprises the series C4B, a hyphen, conduit code 4, contact code 1, actuator code 01 and the fixed N suffix. Preserve leading zeros and keep 08H as a complete actuator code.
| Code segment | Code | Selection |
|---|---|---|
| Conduit | 1 | Pg13.5, single entry |
| 4 | M20, single entry | |
| Contact | 1 | 1NC+1NO, snap action |
| 3 | 1NC+1NO, slow action | |
| 4 | 2NC, slow action | |
| Suffix | N | Fixed suffix identifying the C4B-N version |
| M20 snap-action model | Head code | Actuator | NC direct opening |
|---|---|---|---|
| C4B-4101N | 01 | Top plunger | Yes |
| C4B-4102N | 02 | Transverse roller plunger | |
| C4B-4103N | 03 | Vertical roller plunger | |
| C4B-4104N | 04 | Resin roller lever | |
| C4B-4105N | 05 | Metal roller lever | |
| C4B-4107N | 07 | Adjustable metal rod lever | |
| C4B-4108N | 08 | Adjustable resin roller lever | |
| C4B-4109N | 09 | Adjustable metal roller lever | |
| C4B-4108HN | 08H | Adjustable rubber roller lever | |
| C4B-4166N | 66 | Plastic rod spring | No |
| C4B-4167N | 67 | Coil spring | |
| C4B-4168N | 68 | Metal rod spring | |
| C4B-4169N | 69 | Flexible whisker |
| Contact-code family | Action | Terminals | Circuit restrictions |
|---|---|---|---|
| C4B-□1 | 1NC+1NO, snap action | NC11-12; NO13-14 | NC direct opening with eligible heads; do not use the two contact circuits for different polarities |
| C4B-□3 | 1NC+1NO, slow action | NC11-12; NO23-24 | NC opens before NO closes; NC direct opening with eligible heads; do not use the two circuits for different polarities |
| C4B-□4 | 2NC, slow action | NC11-12; NC21-22 | Both NC circuits have direct opening with eligible heads and may serve different polarities; switching points need not coincide |
For direct opening, provide at least the specified DOT travel and DOF force. The mechanism mechanically separates the NC contacts through the actuator. This function does not establish a safety integrity level or a complete machine safety function.
| Parameter | Value and condition |
|---|---|
| Enclosure protection | IP66 |
| Electric shock protection | Class I, with ground terminal |
| Pollution degree | 3 under EN 60947-5-1 |
| Operating speed | 1mm/s-0.5m/s |
| Mechanical operating frequency | 120 operations/min |
| Electrical operating frequency | 30 operations/min |
| Rated frequency | 50/60Hz |
| Initial contact resistance | 25mΩ maximum |
| Insulation resistance | 100MΩ minimum at 500VDC |
| Minimum applicable load | 24VDC, 10mA |
| Rated insulation voltage Ui | 380V |
| Vibration, malfunction | 10-55Hz, 0.75mm single amplitude |
| Shock, mechanical durability | 1000m/s² |
| Shock, malfunction | 300m/s²; coil-spring types excluded |
| Ambient temperature | -20°C to +80°C, without icing |
| Humidity | Below 95%RH |
| Withstand-voltage test location | Action condition | Voltage |
|---|---|---|
| Between terminals of the same polarity | Snap action | 2.5kV |
| Slow action | 4kV | |
| Between terminals of different polarities | Slow action | 4kV |
| Between live metal parts | General | 4kV |
| Between each terminal and non-live metal parts | All listed contact forms | 6kV |
| Electrical endurance | Resistive-load condition | Ambient test condition |
|---|---|---|
| More than 500,000 cycles | 250VAC, 3A | Not specified for this load figure |
| 250VAC, 6A | +5°C to +35°C, 40-70%RH |
Verify sealing for the actual installation and operating environment. IP66 does not permit immersion in water or oil. Keep the cover installed whenever the switch is energized.
Current values are in amperes. These are steady-current ratings; inductive loads use AC power factor at least 0.4 or DC time constant below 7ms. Lamp and motor load columns allow inrush of ten and six times steady current, respectively.
| Supply | Voltage | Noninductive load | Inductive load | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Resistive | Lamp | Inductive | Motor | ||||||
| NC | NO | NC | NO | NC | NO | NC | NO | ||
| AC | 125V | 10 | 3 | 1.5 | 10 | 5 | 2.5 | ||
| 250V | 2 | 1 | 3 | 1.5 | |||||
| 400V | 1.5 | 0.8 | 3 | 1.5 | 0.8 | ||||
| DC | 8V | 10 | 6 | 3 | 10 | 6 | |||
| 14V | |||||||||
| 30V | 6 | 4 | 6 | 4 | |||||
| 125V | 0.8 | 0.2 | 0.8 | 0.2 | |||||
| 250V | 0.4 | 0.1 | 0.4 | 0.1 | |||||
OF is maximum operating force; RF is minimum release force. PT is maximum pretravel, OT is minimum overtravel, MD is maximum differential travel, DOT and DOF are minimum travel and force required for direct opening. FP is maximum free position; OP is the operating-position datum. TT and PT2 in parentheses are reference values. MD applies only to snap action; PT2 applies only to slow action.
| Model / head family | OF | RF | PT | PT2 | OT | MD | DOT | DOF | TT | FP | OP |
|---|---|---|---|---|---|---|---|---|---|---|---|
| C4B-4101N / head 01 | 18.63N | 1.96N | 2mm | (3mm), slow action | 5mm | 1mm, snap action | 3.2mm | 49.03N | (7mm) | 38mm | 35±1mm |
| C4B-4102N / head 02 | 51mm | 48±1mm | |||||||||
| C4B-4103N / head 03 |
Lever characteristics apply in either operating direction. Roller-lever forces are measured at a 31.5mm lever setting; rod-lever forces are measured at 140mm. The table distinguishes snap and slow action rather than treating direct-opening travel as a single value.
| Model / head family | OF maximum | RF minimum | PT | PT2, slow only | OT minimum | MD, snap only | DOT, slow | DOT, snap | DOF minimum | TT reference |
|---|---|---|---|---|---|---|---|---|---|---|
| C4B-4104N / head 04 | 9.41N | 1.47N | 21±3° | (45°) | 50° | 12° | 35° | 55° | 19.61N | (75°) |
| C4B-4105N / head 05 | ||||||||||
| C4B-4108N / head 08 | ||||||||||
| C4B-4109N / head 09 | ||||||||||
| C4B-4108HN / head 08H | ||||||||||
| C4B-4107N / head 07 | 2.12N | 0.29N |
Slow-action values describe the corresponding head with contact code 3 or 4, not a change to the snap-action C4B-41…N model. Two NC circuits may switch at different positions; verify their operation in the assembled mechanism.
| Model | OF maximum | PT | MD | RF / OT / OP / TT | DOT / DOF |
|---|---|---|---|---|---|
| C4B-4166N | 1.5N | 15±5° | 10±2° | Not specified | Not applicable; no direct opening |
| C4B-4167N | |||||
| C4B-4168N | |||||
| C4B-4169N |
Spring and whisker heads accept movement around the actuator axis, excluding axial pushing. Apply movement within the outer third of the actuator length measured from the tip.
| Head code | Dimensional selection features |
|---|---|
| 01 | Ø9.2mm stainless steel plunger; 16mm head offset |
| 02 / 03 | Ø12.7×4.8mm metal roller in transverse or vertical orientation |
| 04 | Ø17.5×6.6mm resin roller; R31.5mm lever |
| 05 | Ø17.5×7mm metal roller; R31.5mm lever |
| 07 | Ø3×160mm stainless steel rod; 145mm maximum illustrated adjustment |
| 08 / 09 | Ø17.5×6.6mm roller; R25-R89mm adjustment |
| 08H | Ø50mm rubber roller; R25-R89mm adjustment |
| 66 / 67 / 68 / 69 | 203.5±12mm overall height |
The body drawings show 40±1mm width, 43mm depth, 30±0.2mm by 60±0.2mm mounting centers and Ø5.3mm mounting holes. Use the complete outline for the selected actuator before machining. Secure the body with M5 screws and washers. Head mounting can be reset in four orientations after removing the four head screws; exclude debris and retighten correctly.
Apply roller-lever loads horizontally to avoid bending the actuator or shaft. For roller plungers, keep the cam angle below 30°, use a cam with the specified 6.3S surface-finish designation and HV400-500 hardness, and align the plunger groove with the sleeve top as shown in the attachment. The illustrated cam/sleeve offset is 2.8mm.
Wire only with power isolated. Keep wire fragments out of the enclosure, use insulated M3.5 crimp terminals and choose AWG20-AWG18 or 0.5-0.75mm² conductors. Position terminals clear of the casing and allow the cover to close without trapping them. Terminal thickness must not exceed 0.5mm.
| Crimp-terminal dimension | Value |
|---|---|
| Thickness t | 0.5mm maximum |
| Hole diameter Ødz | 3.7mm |
| Barrel diameter ØD | 2.9mm |
| Width B | 6.6mm |
| Length L | 19mm |
| Dimension F | 7.7mm |
| Dimension I | 8mm |
| Figure reference | Fastener | Torque |
|---|---|---|
| 1 | M3.5 terminal screw | 0.59-0.78N·m |
| 2 | Outer cover screws | 1.18-1.37N·m |
| 3 | Head mounting screws | 0.78-0.88N·m |
| 4 | M5 body mounting screws | 4.90-5.88N·m |
| 5 | Conduit connector | 1.77-2.16N·m |
| 6 | Roller-lever installation screw | 4.90-5.88N·m |
Keep conduit connectors within their specified torque range; excessive tightening can damage the enclosure. For loads below 24VDC/10mA, select a dedicated low-load configuration. Contacts already used on general loads should not be reassigned to small loads. Suitable suppression and contact protection are required for bounce-related noise and impulse currents.
| Designation | Referenced standard | Documentation |
|---|---|---|
| CCC | GB/T 14048.5 | Request applicable model documentation for the intended market |
| TUV | EN 60947-5-1 | |
| CE |
| Utilization category | Operational rating |
|---|---|
| AC-15 | 6A at 250VAC |
| DC-13 | 0.3A at 220VDC |
Personnel-protection duties, nuclear or utility infrastructure, outdoor or chemically aggressive environments, strong electromagnetic disturbance, fire or explosion hazards, military equipment and aerospace require a separately specified design and written application approval.
