Apartment, Multifamily & Rental Property Access Control
Apartment building access control hardware: anti-clone readers with matched fob sets, QR visitor codes, 4G controllers for rentals and UHF tags for gates.
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EB-120 Electric Drop Bolt Lock with Door-Status Output, 12V
Fail-safe 12 V DC drop bolt with a door-status signal output for monitored doors, 0/3/6/9 s delay and 110 mA draw. Fits wood, metal, glass and fire doors.
- Door-status signal output for door-held-open and forced-door monitoring
- Fail-safe: the bolt releases when the 12 V DC supply is removed
- 12 V DC ±10% supply with 110 mA operating current
- Adjustable 0/3/6/9 s time delay before the bolt relocks
- Microprocessor and photoelectric bolt control with built-in MOV reverse-current protection
- Security mode
- Fail-safe (power off = released)
- Status output
- Door-status signal
- Supply
- 12 V DC ±10%
- Operating current
- 110 mA
- Time delay
- 0 / 3 / 6 / 9 s
- Lock body
- 205 × 42 × 35 mm
Reply within 24 hours Tested before dispatch Worldwide shipping
Electric Drop Bolt Lock with Door-Status Output, 12V: overview
EB-120 is a fail-safe electric drop bolt for doors that your access control system needs to monitor as well as lock. Besides the 12 V DC bolt drive, it provides a door-status signal output, so a controller with a door-sensor input can flag doors that are held open or forced. The bolt releases whenever power is removed, which suits egress routes tied to a fire-alarm interlock.
The lock shares its core design with our EB-110: microprocessor control, photoelectric bolt control to prevent mechanical faults, a low-power and low-temperature design, and built-in reverse-current (MOV) protection. It draws 110 mA at 12 V DC ±10% and has passed a 500,000-cycle power-on aging test. The body is high-strength aluminum alloy with a stainless-steel bolt, and it fits wooden, metal, glass and fire doors, including double-swing and sliding types.
Integration notes
Wire the door-status leads to the door-sensor input of your controller, and switch the 12 V DC lock supply through the relay's normally closed (NC) contact for fail-safe operation. Set the time delay to 0, 3, 6 or 9 s to control how long the bolt stays retracted after release. The lock body measures 205 × 42 × 35 mm and the strike plate 90 × 25 × 2 mm; ask us for a dimensioned drawing before machining the frame cut-out. For frameless glass doors, pair it with the EB-130 U bracket or the EB-140 glass bracket.
More features
- Aluminum-alloy body, stainless-steel bolt; passed a 500,000-cycle power-on aging test
- CE, FCC and RoHS listed; fits the EB-130 and EB-140 glass door brackets
EB-120 specifications
Locking
| Lock type | Electric drop bolt, mortise mount |
|---|---|
| Security mode | Fail-safe (power off = bolt released) |
| Time delay | 0 / 3 / 6 / 9 s, adjustable |
| Signal output | Door-status signal output |
| Control | Microprocessor control circuit with photoelectric bolt control |
Electrical
| Operating voltage | 12 V DC ±10% |
|---|---|
| Operating current | 110 mA |
| Circuit protection | Built-in reverse-current protection (MOV) |
Mechanical & environment
| Lock body (L × W × T) | 205 × 42 × 35 mm |
|---|---|
| Strike plate (L × W × T) | 90 × 25 × 2 mm |
| Materials | High-strength aluminum-alloy body, stainless-steel bolt |
| Suitable doors | Wooden, glass, metal and fire doors; double-swing and sliding doors |
| Endurance | 500,000-cycle power-on aging test |
| Temperature | Low-temperature design; rated range not published (test data on request) |
Compliance & accessories
| Certifications | CE, FCC, RoHS |
|---|---|
| Optional brackets | EB-130 U bracket, EB-140 glass door bracket (sold separately) |
EB-110 vs EB-120 electric drop bolts
| Feature | EB-110 | EB-120 |
|---|---|---|
| Security mode | Fail-safe (fail-secure build on request) | Fail-safe |
| Status output | None | Door-status signal |
| Time delay | 0 / 3 / 6 / 9 s | 0 / 3 / 6 / 9 s |
| Lock body (L × W × T) | 200 × 28 × 39 mm | 205 × 42 × 35 mm |
| Certifications listed | CE, FCC, RoHS | CE, FCC, RoHS |
| Glass door brackets | EB-130, EB-140 | EB-130, EB-140 |
Both locks run on 12 V DC ±10% at 110 mA and use a 90 × 25 × 2 mm strike plate.
Specifications can change between production batches. Confirm the current revision with us before placing volume orders.
Ordering options
Quote the SKU that matches your frequency, interface and mounting. Not sure? Send us your controller model and we will pick the variant for you.
| SKU | Configuration | Actions |
|---|---|---|
| EB-120-S | Fail-safe electric drop bolt with door-status signal output, 12 V DC, 0/3/6/9 s delay, with strike plate |
Where the EB-120 is used
- Monitored office entrances where the controller must report doors held open or forced
- Frameless glass doors in lobbies and showrooms, mounted with an EB-130 U bracket
- Fire-escape doors that release automatically on power loss or a fire-alarm cut-off
- Double-swing doors in clinics and schools managed by a card reader or keypad
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EB-120 FAQ
What does the door-status output tell the controller?
It reports the door status, so a controller with a door-sensor input can raise door-held-open or forced-door events. Wire it to that input on the controller.
Is EB-120 fail-safe or fail-secure?
Fail-safe. The bolt retracts when the 12 V DC supply is removed, so the door is free during a power failure or a fire-alarm cut-off.
How much current should I budget per lock?
The rated operating current is 110 mA at 12 V DC ±10%. Add up every device on the supply and allow 25–50% headroom when choosing the power supply.
Which brackets fit frameless glass doors?
Use the EB-130 U bracket or the EB-140 glass bracket. Both are stainless steel and clamp glass 8–15 mm thick.
Can you send a cut-out drawing?
Yes. The body is 205 × 42 × 35 mm and the strike plate 90 × 25 × 2 mm; we send a dimensioned drawing on request so you can confirm the frame cut-out before machining.
Before you buy
Related buyer guides
Magnetic Lock Wiring Diagrams: Maglock, Exit Button, Power Supply and Reader
Maglock wiring with dry-relay COM/NC: keypad and reader diagrams, REX signals, approved egress release paths and manufacturer-specific suppression.
Fail-Safe vs Fail-Secure Locks: How to Choose for Each Door
A fail-safe lock releases when power is cut; a fail-secure lock stays locked. Learn which to use per door, how to wire NO/NC, and what egress codes expect.
Standalone Access Control Keypad Programming: Master Code, Users and Reset
Program a standalone access control keypad: enter programming mode, change the master code, add card and PIN users, set relay time, reset and wire it.
Related products
EB-110
Fail-Safe Electric Drop Bolt Lock, 12V, with Time Delay
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EB-130
Drop Bolt Lock U Bracket for Frameless Glass Doors
Stainless-steel U bracket that mounts an electric drop bolt on frameless glass doors 8–15 mm thick with a 180° opening range. Listed for EB-110 and EB-120.
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EB-140
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Get pricing for the EB-120
Send your card type, interface and quantity. You get a quote, lead time and compatibility notes within 24 hours — samples available for most items.