Omron E5 Temperature Controller Family Guide: E5C2, E5CZ, E5CC, E5CN, E5EC Compared
Table of contents
Omron E5 temperature controller family guide
The E5 family spans dial thermostats to programmable controllers, and several generations share the same 48×48 mm panel cutout, which is why buyers often cannot tell which unit they are holding. The table below positions each series, lists what we stock, and the model-code section decodes the output letters so you can order a like-for-like replacement.
The family at a glance
| Series | Position in family | Panel size (typical) | In our catalog |
|---|---|---|---|
| E5C2 | Economy, dial-set thermostat | 48 × 48 mm | stocked |
| E5CZ | Economy digital, fixed ranges | 48 × 48 mm | stocked |
| E5CC | Standard 48-square, basic PID | 48 × 48 mm | 176 listings |
| E5CN | Standard 48-square, multi-input | 48 × 48 mm | 112 listings |
| E5EC | Current-generation 48-square | 48 × 48 mm | 241 listings |
| E5AC | Current-generation 48 × 96 | 48 × 96 mm | 178 listings |
| E5EN | Advanced 48 × 96 | 48 × 96 mm | 63 listings |
| E5AN | Advanced 96-square | 96 × 96 mm | 62 listings |
Panel sizes are the typical family values. Verify the panel cutout against the manual before ordering a replacement, especially when swapping one series for another in the same cabinet.
Decoding the model codes
Take E5CN-R2MT-500, a unit we stock. E5CN is the series: standard 48-square with multi-input. The letter R marks a relay output, which switches external contactors and SSRs directly. Voltage outputs are marked with a different letter; they drive an external SSR and give tighter control at short cycle times. The remaining letter groups encode input type, option units and depth generation, and the -500 suffix identifies the variant as stocked. Copy the full code when ordering a like-for-like replacement.
The same logic applies across the family. E5CC-RX3DSM-000, E5CC-RX2ASM-802, E5CZ-C2ML, E5C2-R20K, E5CS-VQ1T-F, E5CSL-RP and E5CX-QTC are all current or recent listings in our catalog.
Which one do you actually need?
- Replacing a failed unit: order the exact model code from the front label. The family spans generations that look alike but differ in depth, terminals and software.
- Simple on/off heating (band heaters, small ovens): the E5C2 dial thermostat or the E5CZ, the cheapest options with no configuration needed.
- PID control with auto-tuning: E5CC or E5CN. The E5CN accepts thermocouple or RTD input on the same hardware.
- New panel build: choose the current-generation E5EC, E5AC or E5EN. Parts availability is better than for the discontinued series.
- Driving an SSR: pick a voltage-output model rather than relay output, since relays wear out quickly at short cycle times.
Power supply and documentation
The stocked E5CN-R2MT-500 and E5CZ-C2ML listings run on 100-240 V AC, which covers both 110 V and 230 V panels. DC-supply variants exist in the family, so check the supply marking on the side of your existing unit before ordering; connecting a 24 V DC model to mains destroys it instantly. Full electrical and dimensional data for the E5CN is in the official Omron E5CN datasheet (PDF), and the Omron E5CC product page covers the current 48-square series.
Frequently asked questions
What is the difference between E5CC and E5CN?
Both are standard 48×48 mm digital controllers with PID and auto-tuning. The E5CN is the multi-input series, one hardware accepts thermocouple or RTD, and it carries more option variants. The E5CC is the cost-focused basic series. For a like-for-like replacement, match the full model code.
What does the R in E5CN-R2MT mean?
R denotes a relay output. Relay outputs switch contactors and small loads directly; for fast-cycling SSR control choose a voltage-output model instead.
Will an E5CC fit the hole where my old E5CZ was?
Usually yes, since both are 48×48 mm family units. Always verify the panel cutout and terminal layout against the manuals before ordering, as depth and terminal positions differ between generations.
Do you stock E5 accessories like sockets and adapters?
Stock changes constantly. Search Omron E5 in the catalog, or email moritta@koeed.com with the model codes on your unit and panel.
Ordering an E5 controller
Click a stocked series in the table above, browse the temperature controller catalog, or email us the full model code from your unit's label and we confirm the exact match before you pay. Every E5 controller ships with a 1-year warranty and worldwide delivery. For everything else in the cabinet, see our MRO supplies catalog.