Aqara uses T1, T2, E1, H1, P1 and P2 across products that can be quite different. The number can distinguish related models, but it does not tell you the radio protocol, wiring requirements or Home Assistant support on its own. Two products sharing a suffix are not necessarily versions of each other.
The useful way to read these names is by product category and exact model. A T2 relay offers a different set of functions from a T1 relay; a P2 contact sensor uses a different protocol from the P1 contact sensor. Those are specific comparisons you can verify. Treating every E1 as a fixed budget tier, or every increase in number as a guaranteed replacement, goes beyond what the cited product specifications establish.
The examples below separate the names on the box from the details that affect a purchase or integration.
Why Aqara’s suffixes can be misleading
A letter and number look like a version code, especially when two similar products sit next to each other in a shop. Aqara reuses these short names across hubs, sensors, switches and controllers, though. An E1 hub and an E1 curtain driver serve different purposes, just as a P1 motion sensor and a P1 contact sensor detect different things.
The product pages and device records cited here provide names, model numbers and specifications; they do not supply a universal decoder for every letter. Read a higher number as a reason to compare the two products, rather than a specification in itself. The same care applies to regional versions sold with similar English names.
T1 and T2: compare the relay modules
The Single Switch Module T1 and Dual Relay Module T2 are a useful comparison, but “T2 replaces T1” hides some important differences. T1 is a single-channel module sold in with-neutral and no-neutral versions. T2 is a dual-channel module with dry-contact and wet-contact applications, interlock and pulse settings. Their wiring, loads and installation requirements need to be checked separately.
Aqara’s T1 with-neutral page advertises power monitoring. Do not transfer that feature to the no-neutral version just because both say T1. The T2 page documents energy monitoring with AC power and notes limitations on features exposed through Aqara’s third-party ecosystem bridges. Direct Zigbee integration has its own feature mapping: Zigbee2MQTT lists the T2 as LLKZMK12LM / DCM-K01, including its supported measurements and controls.
T2 adds useful relay functions, but a higher suffix does not make it a drop-in electrical replacement for every T1 installation. Check the exact module’s wiring diagram, supply and load limits before choosing it.
For shopping purposes, the product names “Single Switch Module” and “Dual Relay Module” tell you more immediately than T1 and T2. Use the number to distinguish the products after establishing which kind of module you need.
E1: a name shared across categories
E1 appears on the Hub E1, the Door/Window Sensor E1 and the Curtain Driver E1. They are a hub, a contact sensor and a motorized curtain controller, not generations of one another. Sharing E1 does not establish a common protocol implementation or make them interchangeable.
Some E1 products are marketed as affordable options. For example, Aqara’s hub buying guidance recommends E1 among the choices for a simple or budget-friendly setup. That is useful positioning for that hub; it is not an official rule that decodes the letter E as “entry tier” across every category or region.
For the contact sensor, the useful identifier is MCCGQ14LM. Its device page explicitly includes the E1 marketing name and lists the supported features. Check that model rather than assuming a similarly named hub or sensor tells you what the contact sensor can do.
H1: check the switch type and regional version
The Smart Wall Switch H1 illustrates another limit of the suffix. Aqara’s H1 EU page distinguishes the regional wall switch and its with-neutral features. The no-neutral version has different capabilities, including differences in monitoring and protection. “H1” on its own does not resolve those choices.
There are also wired wall switches and wireless remote switches carrying the H1 name. A wireless controller is not a load-switching replacement for a wired wall switch. Compare the full product name, region and model number before comparing the digit. There is no need to infer an earlier “H0” product to understand what a listed H1 does.
P1 and P2: identify the sensor family first
Within contact sensors, Door/Window Sensor P1 and Door and Window Sensor P2 do identify materially different products. P1 MCCGQ13LM is a Zigbee device; Aqara’s P2 contact-sensor page specifies native Matter over Thread. The protocol change affects what you need to connect it, not just how new the label looks.
For a direct Home Assistant setup, the Zigbee P1 goes through a compatible Zigbee coordinator and a supported integration such as ZHA or Zigbee2MQTT. A P2 needs a Matter controller and a working Thread border router/network. A Zigbee-only coordinator does not become a Thread border router because the sensor has a higher number. Check the controller and border-router requirements of your chosen Matter platform.
Meanwhile, Motion Sensor P1 is another product entirely. Zigbee2MQTT identifies it as RTCGQ14LM. The shared P1 suffix does not make a motion sensor a replacement for a contact sensor, or imply the same exposed measurements and settings.
| Product | Model or identification | Category and protocol |
|---|---|---|
| Motion Sensor P1 | RTCGQ14LM; MS-S02 white label in the Zigbee2MQTT entry | Motion sensor, Zigbee |
| Door/Window Sensor P1 | MCCGQ13LM | Contact sensor, Zigbee 3.0 |
| Door and Window Sensor P2 | Confirm the regional product label and Matter setup code | Contact sensor, Matter over Thread |
The repeated P1 name identifies two different kinds of sensor. It does not establish that they share a design or belong to one generation. Read the full name and specifications, then use the exact identifiers to check integration support.
What this means for the rest of the catalog
A suffix can be a convenient shorthand once you already know the category. It is a weak basis for comparing unrelated categories. It also does not establish regional availability, hub compatibility, neutral-wire requirements or whether a device uses Zigbee, Wi-Fi or Thread.
The cited manufacturer pages establish the characteristics of particular products. They do not justify expanding one observation—such as the Hub E1’s budget positioning—into a naming policy for the entire catalog. When a listing provides only a suffix and a stock image, ask for the exact model and regional version before ordering.
How to check generation and compatibility
Use the same checks whenever two similarly named devices are on your shortlist:
- Start with the category and full name. A relay module, a wired wall switch and a wireless remote perform different jobs even when they share a letter.
- Read the actual product specifications side by side: protocol, power source, wiring, load limits, region and required hub or controller.
- For Zigbee2MQTT, find the exact device on the supported-device list and read its exposes and pairing notes. The entries include marketing suffixes in descriptions, but model codes and fingerprints are the better way to distinguish variants.
- For ZHA, check the integration’s compatibility guidance and any relevant device handler. A Zigbee2MQTT entry is not a ZHA support guarantee. Matter-over-Thread products need a Matter/Thread check instead of a Zigbee device-list lookup.
Keep the model code in your own inventory alongside the friendly name. That makes it easier to find the right manual and firmware notes later, even if a seller shortens the product name or reuses a suffix in a new listing.
If you are buying several sensors and routers together, the Zigbee router and end-device guide covers the mesh role that these suffixes also fail to tell you reliably.
FAQ
Is Aqara T2 newer or better than T1? Compare the particular relay modules. T2 offers two channels and functions such as dry-contact operation and interlock; T1 includes distinct neutral and no-neutral products. The label alone does not establish the correct replacement for your wiring or load.
What does E1 in Hub E1 mean? It is part of that product’s name. Aqara positions the hub as a simple, budget-friendly option in its buying guidance, but the cited sources do not establish a universal E1-to-budget naming rule.
Is H1 compatible with T1 accessories? The suffixes do not answer that. Identify whether you mean a wired switch, wireless remote or relay, then check the hub, protocol and specific supported interaction. Devices can participate in the same automation without being interchangeable electrical accessories.
What is the difference between P1 and P2 sensors? Name the sensor family first. For the contact sensors discussed here, P1 is Zigbee and P2 is Matter over Thread. Motion Sensor P1 is a different device; its P1 label does not describe a contact-sensor generation.
Does a higher number always mean newer or better? It does not provide enough information. Use the exact product’s specifications and the features you need, rather than treating the number as a catalog-wide ranking.
Sources and scope
The examples are based on the linked Aqara product pages and Zigbee2MQTT device records, checked on 25 October 2026. They verify specific hardware differences and repeated suffixes, not an official account of Aqara’s naming philosophy. No hardware was installed for this comparison.
The most useful distinction remains the full product identity. Record the exact model, region and protocol, then check the integration you intend to use. A familiar pair of letters and digits is a starting point for that lookup, not the result.