Omron D4C-1220 — Slim Limit Switch, Roller Lever, 3 m
SKU: D4C-1220USD 30.00
16 mm slim sealed limit switch with roller lever actuator, 1NC/1NO snap-action contacts, pre-wired 3 m VCTF oil-resistant cable, 5 A 250 VAC / 4 A 30 VDC, IP67, -10 to +70 °C. Triple-sealed die-cast construction.
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Product Overview
The D4C-1220 is the high-sensitivity roller-lever variant of Omron's D4C sealed compact limit switch family — a 16 mm-thin die-cast housing with triple-sealed construction (plunger section sealed with nitrile rubber packing AND diaphragm, switch section sealed with nitrile rubber cap, cable entrance encapsulated) for use in water-splash and oil-splash environments. The high-sensitivity '2' suffix means the lever operates with very low force (~5 g operating force vs ~25 g on the standard D4C-1201), making this the right pick for low-mass targets (small flags, light cam plates) or where the cam approach speed is low. The 3 m pre-wired VCTF cable is oil-resistant and pre-cut to length for panel-build OEM installations.
Decoding the D4C-1220 model number
The D4C model code: D4C = slim 16 mm enclosed limit switch family (vs D4A = heavy-duty 40 mm, D4N/D4B = medium safety-rated); 1 = actuator code (1 = roller lever, 2 = plunger, 3 = cross-roller, 4 = sealed plunger, etc.); 2 = high sensitivity (vs 1 = standard sensitivity); 2 = contact configuration (1 = 1NC, 2 = 1NC/1NO); 0 = terminal type (0 = pre-wired cable, 1 = M12 connector, 2 = screw terminal).
Triple-sealed construction — for oil and water splash
The D4C-1220 has three independent seals: (1) plunger section sealed with nitrile rubber (NBR) packing and a flexible diaphragm — protects the moving plunger from contamination while allowing free motion; (2) switch section sealed with a nitrile rubber cap — protects the snap-action mechanism and contacts from oil and water spray; (3) cable entrance sealed with encapsulating material — protects the wiring transition from cable to internal terminals. Together, these seals give the D4C-1220 an IP67 rating for temporary submersion (1 m for 30 min) and high-pressure washdown resistance (food-processing and machine-tool environments).
High-sensitivity roller lever — for low-force targets
The '2' digit in the 1220 means high sensitivity: the roller lever operates with ~5 g (0.05 N) minimum operating force vs the standard D4C-1201's ~25 g (0.25 N). This is critical for: (1) low-mass targets (small plastic flags, paper sheets, thin metal strips) that would not register on a standard switch; (2) low-speed cam approach (1-10 mm/s) where the target might bounce off the lever; (3) precision position detection where the lever contact can deform a soft target. The trade-off is reduced vibration tolerance — the high-sensitivity lever can chatter in a high-vibration environment; for those applications, the standard-sensitivity D4C-1201 is preferred.
Key Features
- 16 mm slim compact limit switch
- Triple-sealed construction: plunger NBR packing + diaphragm, switch NBR cap, cable encapsulated
- IP67 protection rating — water and oil splash resistant
- Roller lever actuator
- High-sensitivity '2' variant
- 1NC / 1NO snap-action contact
- Contact rating 5 A 250 VAC / 4 A 30 VDC resistive
- Pre-wired 3 m VCTF oil-resistant cable
- SKU: D4C-1220
- Series: D4C Compact Enclosed Limit Switch
- Voltage: 250 VAC
Best-Fit Applications
- Pneumatic cylinder end-of-stroke detection on a packaging machine — D4C-1220 mounted at the cylinder body, lever actuated by the cylinder.
- Conveyor belt edge detection in a small assembly line — D4C-1220 mounted at the side of the conveyor with the.
- Door-position feedback on a small machine guard — D4C-1220 lever actuated by the door panel; 1NO contact illuminates a 'door.
- Limit detection on a sliding gate or transfer mechanism — D4C-1220 at the travel-limit position with a striker on the.
Buying Checklist
- Pick D4C-1220 for 16 mm slim high-sensitivity roller-lever sealed limit switch with 3 m VCTF cable
- Pick D4C-1201 if the standard sensitivity is acceptable — pick if vibration might cause high-sensitivity lever chattering
- Pick D4C-1230 for cross-roller plunger actuator — pick if the target approaches at 90° to the standard roller direction
- Pick D4C-1301 for M12 connector instead of pre-wired cable — pick for quick-disconnect installations
- Pick D4N-112G if you need a safety-rated limit switch with direct opening
- Pick D4A-A00 for heavy-duty 40 mm package with -40 to +100 °C operating range — pick for outdoor or food-grade environments
Technical Specifications
| Model | D4C-1220 |
|---|---|
| Series | D4C Compact Enclosed Limit Switch |
| Type | 16 mm slim sealed roller-lever limit switch, high sensitivity |
| Contact Configuration | 1NC / 1NO snap-action (SPDT Form C) |
| Snap-Action Characteristic | < 5 ms transfer time |
| Actuator Type | Roller lever (resin roller, lever length adjustable) |
| Operating Force (OT) | 5 g (0.05 N) min |
| Release Force (RF) | 0.5 g (0.005 N) min |
| Rated Voltage | 250 VAC max / 30 VDC max |
| Rated Current | 5 A 250 VAC resistive, 4 A 30 VDC resistive |
| Inrush Current | 15 A max (for inductive loads, ≤ 100 ms) |
| Operating Temperature | -10 to +70 °C (no icing) |
| Mounting | 25 mm mounting hole spacing, 2 × M4 mounting screws on base |
| Certifications | UL listed, CSA, CE, EN 60947-5-1 compliant |
Resources & Downloads
FAQ for D4C-1220
What's the difference between D4C-1220 and D4C-1201?
Both are 16 mm slim sealed roller-lever limit switches with 1NC/1NO snap-action contacts. The D4C-1220 (this SKU) has high-sensitivity lever (~5 g operating force) — pick for low-mass targets, low-speed cam approach, or precision position detection. The D4C-1201 has standard sensitivity (~25 g operating force) — pick for general-purpose use and high-vibration applications where the high-sensitivity lever might chatter. Same electrical specs (5 A 250 VAC, IP67, 3 m VCTF cable), same housing, same dimensions.
Can the D4C-1220 be used in wet or oily environments?
Yes — the D4C-1220's triple-sealed construction (plunger NBR packing + diaphragm, switch NBR cap, cable entrance encapsulated) gives it IP67 protection, suitable for: (1) outdoor installations with rain exposure (temporary submersion to 1 m for 30 min); (2) machine-tool environments with cutting-oil splash; (3) food-processing washdown (high-pressure hot water spray at 80 °C); (4) conveyor installations with water spray. The 3 m VCTF cable is oil-resistant and chemical-resistant for common industrial fluids (mineral oil, cutting fluid, water, dilute acids).
Is the D4C-1220 safety-rated?
No — the D4C-1220 is NOT safety-rated and does NOT have a direct-opening mechanism (DOM). The 1NC / 1NO snap-action contact is suitable for general-purpose position detection but not for personnel-protection guard interlock applications above Cat 1 / PL c. For safety-rated guard door switches (Cat 1 / PL c minimum, up to Cat 4 / PL e), use the D4N-112G (plastic-body DOM), D4B-4111N (aluminum-body DOM), or D4BL-2CRA (guard-lock switch with DOM and 700 N holding force).
What does the high sensitivity "2" suffix mean on the D4C-1220?
The '2' digit indicates high sensitivity — the roller lever operates with ~5 g (0.05 N) minimum operating force vs the standard D4C-1201's ~25 g (0.25 N) min.
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