Original Tier-2 OEM · Vancouver, BC
KF-9074 /
KF-9075Elevator safety contact switches, engineered so the spring never carries current.
The fixed safety contact base and its mating moving contact bridge, certified to IEC 60947-5-1 and EN81-1, -2. Current is routed through a braided copper shunt; the stainless return springs stay electrically isolated. Shipped factory vacuum-sealed.
- Ith
- 2 A
- Ue
- 230 VAC · 200 VDC
- Category
- AC-15 ; DC-13
- Standard
- IEC 60947-5-1
Engineering failure analysis
Separate the force path from the current path.
As you scroll, the KF-9075 bridge plunges into the KF-9074 base. At full travel the contacts close and 2 A at up to 200 VDC flows — through copper, never through steel.
- FM-01
Spring-borne current
When a return spring doubles as the conductor, I²R heating at the contact interface flows into the spring itself. Repeated thermal cycling can relax spring force — and contact pressure falls with it.
Stainless steel coil springs are electrically isolated. They provide force only: zero current, zero Joule heat.
- FM-02
Uncontrolled current path
Current that finds its own way through pivots and sliding surfaces produces unpredictable resistance and localised hot spots.
A dedicated 12×43/0.05 braided copper shunt carries the full 2 A rated current from terminal to moving contact.
- FM-03
Silver-alloy oxidation in storage
Silver-alloy contacts tarnish in humid or sulphur-bearing air while parts sit in a stores cabinet, raising initial contact resistance.
Every unit leaves the factory vacuum-sealed, so contacts arrive in as-manufactured condition.
Bill of materials
KF-9074 — 12-part build
Switch the viewport to Exploded BOM to see each item separated along its assembly axis. Numbers match the balloons in the 3D model.
- 01×1
Body
KF-9074 housing
- 02×1
Cover
Top cover with actuator slot
- 03×1
Bracket
Mounting bracket, 29 mm pitch
- 04×1
Contact lever support
Insulated moving-contact carrier
- 05×1
Spring
Stainless steel, current-free (L)
- 06×1
Spring
Stainless steel, current-free (R)
- 07×1
Copper wire
Braided 12×43/0.05 (L)
- 08×1
Copper wire
Braided 12×43/0.05 (R)
- 09×1
Screw assembly
M3×8.5 (L)
- 10×1
Screw assembly
M3×8.5 (R)
- 11×2
Washer
M3
- 12×2
Nut
M3
Technical data
Electrical ratings & envelope
- Standards
- IEC 60947-5-1 · EN81-1 · EN81-2
- Conventional thermal current
- Ith = 2 A
- Rated operational voltage
- Ue = 230 VAC; 200 VDC
- Rated operational current
- Ie = 2 A
- Utilization categories
- AC-15 ; DC-13
- AC-15: AC electromagnetic loads · DC-13: DC electromagnets
- KF-9074 base envelope
- 73 × 27.5 mm
- KF-9074 mounting pitch
- 29 mm
- KF-9075 bridge envelope
- 40.5 × 12.1 mm
- Current path
- Braided copper shunt 12×43/0.05
- Return springs
- Stainless steel, electrically isolated
- Delivery
- Factory vacuum-sealed
Cross-reference
One part, every number on your work order
Search by any of these references — they all resolve to the KF-9074 / KF-9075 pair supplied here.
KF-9074
Safety contact base
KF-9075
Actuator bridge
2L1A000001
OEM reference
2L1A000001V01
OEM reference, V01 revision
6400.00.0001CN
OEM reference
6400.00.0001CNV01
OEM reference, V01 revision
WITTUR CN0229
Interchange reference
Delivery condition
Factory vacuum-sealed.
Silver-alloy contacts begin to oxidise the moment they meet humid, sulphur-bearing air. Each switch is vacuum-sealed at the factory, so the contact surfaces your technician installs are the surfaces that left the line — not ones that aged on a shelf.
Quotes & samples
Request KF-9074 / KF-9075 pricing
For elevator OEMs, modernisation contractors and maintenance fleets across North America. Tell us the cross-reference on your work order and the volume you need.
Apex Lift Controls · Vancouver, BC, Canada