Description
The OMRON 3G2A9-BAT08 battery is an industrial lithium backup battery for compatible OMRON programmable logic controllers and automation equipment.
OMRON identifies C500-BAT08 as the successor to the discontinued 3G2A9-BAT08 reference. Therefore, buyers searching for either part number should verify their controller’s recommended replacement.
This primary lithium battery provides a nominal voltage of 3.6V and supports the battery-backed functions of specified controllers.
Key Features
- OMRON Battery Reference: 3G2A9-BAT08.
- Replacement Reference: C500-BAT08 supersedes the older battery model.
- 3.6V Nominal Voltage: Suitable for compatible equipment designed for this voltage.
- Primary Lithium Chemistry: Non-rechargeable industrial battery.
- PLC Backup Application: Intended for supported controller backup functions.
- Original Part-Number Identification: Both battery references appear on the supplied packaging.
- Single Battery Unit: One backup battery per package.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | OMRON |
| Original Part Number | 3G2A9-BAT08 |
| Superseding Reference | C500-BAT08 |
| Nominal Voltage | 3.6V |
| Chemistry | Primary Lithium |
| Capacity | Verify actual battery |
| Rechargeable | No |
| Application | PLC Backup |
| Quantity | 1 Battery |
| Package Country Marking | Made in Japan |
The actual cell chemistry subtype, capacity, connector and manufacturing details should be verified against the supplied battery and manufacturer documentation.
Compatible OMRON PLC Systems
OMRON identifies C500-BAT08 / 3G2A9-BAT08 for a range of supported older PLC families.
These include selected models within:
- OMRON C20 and C20P series
- OMRON C50 and C120 series
- OMRON C500 and C1000H series
- OMRON C2000H series
- OMRON CV500 and CV1000 series
- OMRON CQM1 and related compatible equipment
However, not every controller within these families necessarily uses the same battery connection or replacement procedure.
Therefore, always compare the complete model number and equipment manual before selecting a replacement.
Why Does an OMRON PLC Need a Backup Battery?
Industrial controllers may use backup batteries to preserve designated memory contents during a power interruption.
For example, some OMRON controllers use battery-backed memory to retain stored information when the main power supply becomes unavailable.
Moreover, particular controllers may use the battery for clock or configuration backup.
The precise backup function depends on the equipment model.
Consequently, replacing an aging battery according to the manufacturer’s maintenance schedule can help reduce the risk of retained-data loss.
3G2A9-BAT08 vs C500-BAT08
The older OMRON 3G2A9-BAT08 reference has been discontinued.
OMRON identifies C500-BAT08 as the replacement reference.
As a result, customers may encounter both part numbers when researching a suitable PLC backup battery.
Nevertheless, inspect the original assembly and confirm the correct configuration before installation.
OMRON PLC Battery vs Standard 3.6V Lithium Cell
An industrial backup battery is not necessarily interchangeable with any lithium cell that shares the same nominal voltage.
The correct replacement must also meet the equipment’s capacity, discharge, connector and polarity requirements.
For instance, two 3.6V cells may differ in dimensions or terminal arrangements.
Therefore, never select a replacement based only on the voltage.
Installation and Replacement Guidance
- Identify the OMRON controller’s complete model number.
- Verify the original battery reference.
- Review the manufacturer’s maintenance and battery replacement instructions.
- Follow the required precautions for retaining PLC data.
- Inspect the replacement battery and connector.
- Replace the battery according to the applicable equipment procedure.
- Confirm the controller’s battery status after replacement.
Important: Replacement procedures vary between OMRON controller families. Some models specify a short replacement window to protect memory data. Qualified maintenance personnel should follow the exact controller manual.
Battery Storage and Handling
Store unused lithium backup batteries in a dry environment under appropriate temperature conditions.
Additionally, keep the terminals protected from conductive materials to avoid accidental short circuits.
Inspect the battery for damage, leakage or deterioration before installation.
Always verify the actual battery’s age and condition when sourcing older industrial battery references.
Battery Safety Instructions
- Never recharge a non-rechargeable lithium battery.
- Avoid short-circuiting the terminals.
- Do not crush, puncture or dismantle the battery.
- Keep away from excessive heat and fire.
- Do not reverse connector polarity.
- Never install a damaged or leaking battery.
- Store securely away from children.
- Dispose of spent batteries according to applicable regulations.
Frequently Asked Questions
What is the OMRON 3G2A9-BAT08 battery used for?
It is a backup battery for compatible OMRON PLC controllers and industrial automation equipment.
Is 3G2A9-BAT08 the same as C500-BAT08?
OMRON identifies C500-BAT08 as the successor to the discontinued 3G2A9-BAT08 reference. Check equipment requirements before replacing the original assembly.
What is the nominal voltage?
The battery reference uses a nominal voltage of 3.6V.
What is its capacity?
Capacity can vary between original specifications and third-party replacement assemblies. Confirm the rating printed on the actual supplied battery.
Is this battery rechargeable?
No. It is a non-rechargeable primary lithium battery.
Can I use this battery with every OMRON PLC?
No. Compatibility depends on the controller model and battery arrangement.
How many batteries are included?
One industrial backup battery per package.
Buy OMRON 3G2A9-BAT08 PLC Backup Battery Online at ArcEin
Order the OMRON 3G2A9-BAT08 C500-BAT08 3.6V Lithium PLC Backup Battery from ArcEin for compatible industrial automation applications.
For bulk purchases or part-number enquiries, contact contactus@arcein.in.
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