BN-LINK SU101C 7-Day In-Wall Timer Switch, 18 Programs, Single-Pole/3-Way

Set porch lights to follow a weekly schedule with the BN-LINK SU101C in-wall digital timer. It can also schedule indoor lights and fans, making it useful for regular routines at home.

Choose from up to 18 on/off programs, with schedules that can be set for individual days or preset combinations. Need the same timer for a single-pole or 3-way setup? The SU101C supports both wiring configurations.

Random mode can vary on and off times while you’re away, and Daylight Saving Time mode helps adjust the clock seasonally. The switch requires a neutral wire and is intended for indoor installation.

Best use cases

Use the timer to automate porch, entryway, hallway, garage, patio, or ceiling-fan schedules from a wall switch. For example, a recurring evening schedule can turn a hallway light on and off without relying on someone to operate the switch each time. It can control outdoor lights when the timer itself is installed indoors.

The 7-day schedule gives you room to set different routines for weekdays and weekends, or to choose preset day combinations. Programs can be set as short as one minute, which is useful when you want more precise on/off timing than a simple dusk-to-dawn style routine. This is a scheduled wall-switch approach rather than a plug-in timer: the control is installed at the switch location and works with supported single-pole and 3-way wiring.

Strengths

The SU101C combines automatic scheduling with manual control. Switch between AUTO for programmed operation and MANUAL for direct on/off control, so you can use the timer’s schedule as your usual routine while still choosing manual operation when needed. Its built-in rechargeable battery preserves settings during a power outage.

Random mode postpones on and off times by 0–30 minutes to create variation in lighting schedules when you’re away. DST mode provides a one-touch seasonal time adjustment. The display has no backlight, a practical detail for installations where an illuminated screen would be unwanted in a dark room.

Buyer feedback is generally favorable about the timer’s operation and use for porch lights, while experiences with programming and the instructions are mixed. Some buyers find setup straightforward, others report difficulty following the programming steps. Carefully setting the current time, selecting AUTO mode, and checking for overlapping programs are practical parts of getting a schedule running as intended.

Key specifications

• Type: In-wall digital timer switch
• Model: SU101C
• Scheduling: 7-day, up to 18 on/off programs
• Wiring: Single-pole or 3-way, neutral wire required
• Supported uses: Lights, fans, and motors
• Electrical rating: 15 A/1875 W, 125 VAC, 60 Hz
• Additional ratings: 10 A/1250 W tungsten, 10 A/1250 W ballast, 1/2 HP
• Functions: Random mode, DST mode, AUTO and MANUAL operation
• Installation: Indoor wall mount, wall plate included
• Certification: ETL listed

Final verdict

The BN-LINK SU101C is suited to households that want recurring control of lights or fans from an in-wall switch, with the flexibility to schedule different days and use either single-pole or 3-way wiring. Its 18 programs, random mode, DST adjustment, and manual control bring several useful scheduling options together in one indoor timer. Confirm a neutral wire is available at the installation location before fitting it.