5800MINI Replacement
The Versa MINI-345 is a same-size drop-in for the Honeywell 5800MINI.
Same 345 MHz 5800-series format, same panels, same programming, and the same 2.2 x 1 x 0.25 in. body. If you've been installing the 5800MINI and finding it harder to source, the sensor Resideo now offers in its place, the 5800MINIV, is a much larger part. If the replacement has to fit the footprint the 5800MINI left behind, the MINI-345 is the one that matches. Below: why it's a true drop-in, how it compares with both Resideo sensors, and the exact steps to replace a 5800MINI on VISTA, 2GIG, and PROA7 panels.
Why the MINI-345 works as a 5800MINI replacement
The MINI-345 runs the same 345 MHz 5800-series format as the Resideo 5800MINI and works on the same panels: Honeywell VISTA, 2GIG GC2/GC3/EDGE, and Resideo PROA7 (PROA7 reads 5800 sensors through the PROTAKEOVER module). It programs as a standard supervised perimeter zone with no special device type, no translator, and no added hardware.
If you've installed a 5800MINI, you already know how to install the MINI-345. Same loop, same zone programming, same supervision behavior, the same 1 in. magnet make-distance on wood (1/4 in. on metal), and the same compact body that mounts in the footprint the 5800MINI left behind.
What about the 5800MINIV?
The 5800MINIV is the sensor Resideo now offers in the 5800MINI's place, and it is a mini in name only. It measures 2.44 x 1.25 x 0.45 in., per Resideo's 5800 Series door/window transmitter spec sheet (dated 4/2026) - about 2.5 times the volume of the 5800MINI's 2.2 x 1 x 0.25 in. body, 25% wider and 80% thicker. It runs on a CR2450 coin cell instead of a CR2032, and its magnet is 1.49 in. long.
Programming is not the issue - it is a 345 MHz 5800-series transmitter like the others. Fit is. On a 5800MINI swap, the 5800MINIV puts a noticeably bigger body on the frame and adds a second battery size to the truck. The MINI-345 keeps the original 2.2 x 1 x 0.25 in. dimensions and the same CR2032.
| Dimension | 5800MINI | 5800MINIV | Versa MINI-345 |
|---|---|---|---|
| Length | 2.2 in. | 2.44 in. | 2.2 in. |
| Width | 1 in. | 1.25 in. | 1 in. |
| Thickness | 0.25 in. | 0.45 in. | 0.25 in. |
| Volume vs 5800MINI | 1x | About 2.5x | 1x - same size |
| Magnet width | 0.520 in. | 0.41 in. | 0.320 in. |
| Battery | CR2032 | CR2450 | CR2032 |
What's different on the MINI-345
Tool-free slide-off cover
The 5800MINI uses a pry-off lid - a flathead to separate the housing, pull the board, reassemble. The MINI-345 lid slides forward and lifts off in one motion. Battery service in seconds with the sensor still on the frame - no tools, no cracked housings.
A narrower magnet for tight frames
The MINI-345's magnet housing is 0.320 in. wide - about 38% narrower than the 5800MINI's 0.520 in. magnet, and narrower than the 5800MINIV's 0.41 in. - so it mounts flush on narrow aluminum window profiles and tight frame channels. Same 1 in. make-distance on wood, 1/4 in. on metal.
The same magnet indicator you rely on
The 5800MINI, the 5800MINIV and the MINI-345 all carry a blue/green/red magnet-placement LED - blue confirms the magnet is in range, green flashes on transmission, red flags low battery. On the MINI-345 it's the patented Bluefield indicator.
Black as well as white and brown
The MINI-345 ships white, and brown and black slide-off covers are sold in 10-packs - swap the lid to match the frame without pulling the sensor. The 5800MINI and the 5800MINIV come in white or brown.
How to replace a 5800MINI with the MINI-345
Because the MINI-345 is the same 345 MHz 5800-series device in the same footprint, replacing a 5800MINI is a delete-and-enroll swap - the zone keeps its number, type, loop, and descriptor. The only thing that changes is the sensor's serial number. Here's the full procedure on a VISTA, 2GIG, or PROA7 panel:
Note the existing zone
Find the zone the 5800MINI is on and note its zone number, zone type, loop, and descriptor - you'll reuse every one of them. (On a PROA7, confirm the PROTAKEOVER module is installed with its rotary switch set to 0 for 5800-series.)
Delete the old 5800MINI serial
In zone programming, clear the 5800MINI's serial number from that zone. Leave the zone number, type, and descriptor in place - you're only swapping the device.
Enroll the MINI-345's serial
Auto-learn or hand-enter the MINI-345's 7-digit serial onto the same zone (trip the contact or remove the cover to transmit). Same loop number as the 5800MINI used.
Mount in the old footprint and walk-test
Mount the MINI-345 where the 5800MINI was (same 2.2 x 1 x 0.25 in. body), magnet on the moving part within 1 in. on wood or 1/4 in. on metal. Run the panel's walk test to confirm the zone faults, restores, and supervises.
Side-by-side comparison
| Resideo 5800MINI | Resideo 5800MINIV | Versa MINI-345 | |
|---|---|---|---|
| Frequency | 345 MHz (5800-series) | 345 MHz (5800-series) | 345 MHz (5800-series) |
| Body size | 2.2 x 1 x 0.25 in. | 2.44 x 1.25 x 0.45 in. | 2.2 x 1 x 0.25 in. |
| Magnet width | 0.520 in. | 0.41 in. | 0.320 in. - 38% narrower than the 5800MINI |
| Magnet gap | 1 in. wood / 1/4 in. metal | Not published | 1 in. wood / 1/4 in. metal |
| Battery | CR2032 | CR2450 | CR2032, 5+ yr typical |
| Cover | Pry-off (flathead) | Not yet tested | Slide-off, no tools |
| Magnet indicator | Blue/green/red LEDs | Blue/green/red LEDs | Blue/green/red LEDs (Bluefield) |
| Colors | White, brown | White, brown | White; brown and black cover packs |
| Supervision and tamper | Yes | Yes | Yes |
For dealers transitioning from the 5800MINI
The MINI-345 is a one-for-one replacement on any 345 MHz 5800-series panel - no firmware update, no panel reconfiguration, no change to your techs' workflow. The only differences they'll notice:
- Cover removal: slide instead of pry - about a 10-second adjustment.
- Magnet-placement LED: the same blue/green/red indicator you already rely on (Versa's Bluefield) - identical behavior, nothing new to learn.
- Color matching: order brown or black cover 10-packs for wood or dark frames; white is standard.
- Battery: the same CR2032, so service calls need no second battery size.
Programming, loop, supervision, and mounting footprint are identical.
Same panels, same install, same footprint - with a tool-free slide-off cover and a narrower magnet.
If you also replace Honeywell's larger 5816 door/window transmitters, see our Honeywell 5816 alternative guide - the MINI-345 enrolls on those zones too.
Ordering and availability
The MINI-345 is available through Versa's authorized distributors, including WAVE Electronics, and dealers can register for wholesale pricing. Replacement color covers are also available:
For the panel-by-panel enrollment steps, see our MINI-345 install guide. Questions about transitioning your install base or volume pricing? Contact Versa Wireless directly.
Full documentation: MINI-345 installation manual and datasheet.
Frequently asked questions
What replaces the Honeywell 5800MINI?
Resideo now offers the 5800MINIV in the 5800MINI's place, but it is far larger: 2.44 x 1.25 x 0.45 in., about 2.5 times the volume, on a CR2450 battery. The Versa MINI-345 is the true drop-in: the same 345 MHz 5800-series format, the same 2.2 x 1 x 0.25 in. body and the same CR2032 as the 5800MINI, so it mounts in the original footprint.
How much bigger is the 5800MINIV than the 5800MINI?
About 2.5 times the volume. Resideo's spec sheet lists the 5800MINIV at 2.44 x 1.25 x 0.45 in. - 25% wider and 80% thicker than the 5800MINI's 2.2 x 1 x 0.25 in. - so despite the name, it is not a mini sensor. The MINI-345 is the same 2.2 x 1 x 0.25 in. as the 5800MINI.
How do I replace a 5800MINI with the MINI-345?
Replace a 5800MINI in four steps: note the existing zone's number, type, loop, and descriptor; delete the 5800MINI's serial from that zone; enroll the MINI-345's 7-digit serial on the same zone; then mount it in the old footprint and run a walk test. Because both are 345 MHz 5800-series sensors in the same 2.2 x 1 x 0.25 in. body, the zone settings, loop, and mounting all carry over - only the serial number changes.
Is the Versa MINI-345 a direct replacement for the Honeywell 5800MINI?
Yes. The MINI-345 uses the same 345 MHz 5800-series format and the same 2.2 x 1 x 0.25 in. footprint, so it programs and mounts exactly like a 5800MINI on VISTA, 2GIG, and PROA7 (with the PROTAKEOVER module) panels. You delete the old serial number and enroll the MINI-345's new serial; the zone, loop, and type stay the same.
Do I need to reprogram the panel to switch to the MINI-345?
Only the sensor's serial number changes. Delete the 5800MINI's serial and enroll the MINI-345's 7-digit serial on the same zone - the zone number, zone type, descriptor, loop, and supervision settings all stay the same. No firmware update or panel reconfiguration.
What is actually different between the MINI-345 and the 5800MINI?
Frequency, panel compatibility, body size, battery (CR2032) and the blue/green/red magnet-placement LED are the same (Versa's version is Bluefield). The MINI-345's magnet is narrower, though - 0.320 in. vs 0.520 in. - so it fits tighter frames. The practical upgrades are a tool-free slide-off cover and a black cover option alongside white and brown.
What is the best Honeywell 5800MINI replacement?
The Versa MINI-345 is the best Honeywell 5800MINI replacement available. It runs the same 345 MHz 5800-series format, mounts in the same 2.2 x 1 x 0.25 in. footprint, and programs identically on VISTA, 2GIG, and PROA7 panels, so it is a true drop-in rather than just an alternative - with a tool-free slide-off cover, a narrower magnet for tight window frames, and none of the extra size of the 5800MINIV.
Does the MINI-345 work on a Resideo PROA7?
Yes - the same way the 5800MINI does. The PROA7/PROA7PLUS is a PROSiX/SiX 2.4 GHz panel, so it reads 345 MHz 5800-series sensors with the PROTAKEOVER module installed (rotary switch set to 0). With the module, both the 5800MINI and the MINI-345 enroll as standard 5800 zones.
Is the Resideo 5800MINI still available?
It is getting harder to find. Some distributors have already replaced their 5800MINI listings with the larger 5800MINIV. Because the Versa MINI-345 is a same-frequency, same-footprint drop-in, you can standardize on it as your 5800MINI replacement without changing panels, programming, or install habits.
What kind of sensor is the MINI-345?
The MINI-345 is a supervised 345 MHz wireless transmitter and door/window contact - a reed-switch magnetic sensor in the Honeywell 5800-series format, powered by a CR2032 lithium battery. It reports open and close on a standard perimeter zone, the same way the 5800MINI does.
