Schneider LP1K0901BD Miniature DC Contactor

LP1K: TeSys K series, DC coil contactor (LC1K = AC coil version)

09: Rated current 9A under AC-3 duty

01: Built-in auxiliary contact: 1 NC (Normally Closed)

BD: Coil voltage DC24V

Terminals: Screw clamp terminals; DIN rail mounting; overall width 45 mm

1. Key Electrical Specifications

Main circuit: 3-pole, 3 NO contacts

AC-3 rating @ 440V: 9A; controls 4kW (380V) motor; 2.2kW (220V)

AC-1 resistive load rating: 20A

Max operating voltage: 690V AC

Coil: DC24V, standard DC coil (non-wide voltage)

Auxiliary contact: Fixed built-in 1 NC

Mounting: DIN rail or panel mounting

Front protection degree: IP20

Certifications: CCC, UL, CSA, RoHS, Green Premium

Mechanical life: 10 million operations; Electrical life (AC-3): 1.3 million operations

Terminal tightening torque: 0.8~1.3 N·m

III. Typical Applications

Directly driven by PLC DC transistor outputs; small fans, solenoid valves, conveyor lines, HVAC equipment, small power motor start-stop in compact control cabinets.

1. Model Differences & Replacement Options
2. LP1K0910BD: Same rating, built-in 1 NO (Normally Open) auxiliary contact (most frequently confused model)
3. LP1K0901BD3: Spring-cage terminal variant (different wiring method)
4. LC1K0901M7: Same current rating, AC220V AC coil version, cannot be directly interchanged
5. Domestic alternatives: Chint NC1K, Delixi CJX2K miniature contactors; verify mounting dimensions and auxiliary contact configuration before replacement
6. Important Notes

DC coil; do not connect directly to AC24V supply

DC coils generate back EMF when de-energized. Add a freewheeling diode if driven by PLC transistor outputs to protect the output channel

LA1K auxiliary contact blocks can be snapped on top to expand additional auxiliary contacts

LP1K0901BD (TeSys K, 3P 9A, DC24V, Built-in 1NC) Application Cases

Core advantages: DC24V coil, directly driven by PLC transistor outputs; built-in 1 NC contact for interlock and status feedback; only 45mm wide, ideal for dense OEM control cabinets; AC-3 rating for 4kW @ 380V

Case 1: Small Fan Control for AHU / Fresh Air Handling Units (Building BMS & HVAC)

Load: 380V three-phase centrifugal fans & exhaust fans (0.75~4kW)

Control logic: DDC/PLC transistor output directly energizes the LP1K0901BD coil; main contacts switch the fan power; the built-in 1 NC contact sends stop feedback to BMS (NC closes when the contactor drops out to report fan shutdown)

Matching components: MCB upstream + LR2K thermal overload relay for motor protection; multiple contactors installed side-by-side on DIN rail to save cabinet space

Benefits: No AC hum from DC coils, suitable for quiet computer room & air-conditioning control cabinets; fully compatible with 24VDC building control buses

Case 2: Segmented Conveyor Drives for Packaging & 3C Automation (Food & Electronic OEM)

Load: Sectional belt conveyors, small drum motors, material feeders, agitator motors (≤4kW)

Control logic: PLC 24VDC outputs control jog or continuous operation; multiple LP1K0901BD units control individual conveyor sections; 1 NC contacts implement section interlock (next section cannot start if the upstream section is still running)

Operating conditions: Frequent cycling (up to 3,600 operations/hour). 10 million mechanical cycles fit continuous production lines; IP20 protection meets clean cabinet requirements for food workshops

Reminder: Fit a freewheeling diode across the coil to suppress back EMF and prevent PLC transistor burnout

Case 3: Small Pump Stations & Circulating Water Systems (Water Treatment & Constant Temperature Tanks)

Load: 380V circulation pumps, chemical dosing agitators, cooling water pumps

Control logic: [text truncated in original draft]

Full TeSys K Contactor Model List

1. Coil Voltage Code for AC Models (LC1K / LC2K)

B7=AC24V、E7=AC48V、F7=AC110V、M7=AC220V、P7=AC230V

2. LP1K DC Single Contactor (3P, PLC DC24V Preferred)

6A frame (06)

LP1K0610BD (6A, 1NO, 24VDC)

LP1K0601BD (6A, 1NC, 24VDC)

LP1K0610BD3 (spring terminals + built-in surge suppression)

LP1K0601BD3 (spring terminals + built-in surge suppression)

9A frame (09, your model series)

LP1K0910BD (9A, 1NO, 24VDC)

LP1K0901BD (9A, 1NC, 24VDC, your part number)

LP1K0910BD3 (spring terminals + built-in surge suppression)

LP1K0901BD3 (spring terminals + built-in surge suppression)

12A frame (12)

LP1K1210BD (12A, 1NO, 24VDC)

LP1K1201BD (12A, 1NC, 24VDC)

LP1K1210BD3 / LP1K1201BD3

16A frame (16)

LP1K1610BD (16A, 1NO, 24VDC)

LP1K1601BD (16A, 1NC, 24VDC)

LP1K1610BD3 / LP1K1601BD3

Replace BD with ED=48VDC, FD=110VDC, MD=220VDC for other coil voltages.

3. LP2K DC Reversing Contactors (Forward/Reverse, built-in mechanical interlock)

9A popular models

LP2K0910BD (9A, 1NO, 24VDC reversing contactor)

LP2K0901BD (9A, 1NC, 24VDC reversing contactor)

LP2K0901BD3 (spring terminals + built-in surge suppression)

Other current ratings follow the same rule: LP2K0601BD, LP2K1201BD, etc.

4. LC1K / LC2K AC Miniature Contactors (AC Coil)

LC1K Single AC Contactors (examples)

LC1K0610B7, LC1K0601B7 (AC24V)

LC1K0910M7, LC1K0901M7 (AC220V)

LC2K AC Reversing Contactors

LC2K0901B7, LC2K1201M7

5. TeSys K Matching Accessories
6. Auxiliary contact block: LA1K (1NO+1NC, snap-on top mounting)
7. Mechanical interlock: LA2K (for DIY forward/reverse with two LP1K units)
8. Thermal overload relays (direct snap-on bottom): LR2K03… (0.1~8A range, matches 06/09A contactors)
9. Surge suppression: BD3 versions have built-in suppression; standard BD coils require external 1N4007 freewheeling diode
10. Quick Selection Guide
11. Need RUN feedback (NO contact) → select 10 (LP1K0910BD)
12. Need STOP feedback (NC contact) → select 01 (LP1K0901BD, your current model)
13. PLC transistor output: prefer BD3 (built-in surge suppression) to eliminate external diodes
14. Vibration-prone conveyor applications: choose spring-cage terminal suffix 3 (BD3)