Product Specifications for Eagle Picher Keeper LTC-3PN-S2 | 3.5V Lithium for E-Mon D-Mon Class 2000 Electric Submeter
| BM Part #: | LTC-3PN-S2 |
|---|---|
| Voltage: | 3.5 Volt |
| Capacity: | 350 mAh |
| Type: | Lithium |
| Length: | 0.65" |
| Width: | 0.60" |
| Height: | 0.27" |
| Shipping Weight: | 0.06Lbs (0.96 oz) |
| Warranty: | DOA |
- Purpose-built for the E-Mon D-Mon Class 2000 KWH demand meter: Direct replacement for OEM part number BL-4PN-S2; maintains meter memory, demand data, and configuration settings during power interruptions and meter service.
- Eagle Picher Keeper series PCB-mount cell: 2 PC pin contacts for direct circuit board installation; cell mounts to the meter PCB via through-hole pins — replacement requires desoldering the existing cell and soldering the new one in place; should be performed by qualified metering or electrical technicians.
- 10-year shelf life with ultra-low self-discharge: Primary lithium chemistry retains capacity through extended deployment in submetering installations where battery service may occur infrequently.
- Wide operating temperature range: -40°C to +95°C (-40°F to +203°F): Stable 3.5V output through the full range of electrical room and outdoor enclosure conditions, including high-temperature environments that can exceed the limits of standard backup cells.
- Compact PCB-mount form factor: 0.65" × 0.60" × 0.27": Sized for direct board-level replacement in the Class 2000 meter without modification.
Product Description
Eagle Picher Keeper LTC-3PN-S2 — E-Mon D-Mon Class 2000 Submeter Battery
The LTC-3PN-S2 is a 3.5V 350mAh primary (non-rechargeable) lithium PCB-mount memory backup cell manufactured by Eagle Picher under the Keeper series. It is a direct replacement for OEM part number BL-4PN-S2 in the E-Mon D-Mon Class 2000 KWH demand submeter, maintaining meter memory, demand data, and configuration during power interruptions and service events.
Application: E-Mon D-Mon Class 2000 Electric Submeter
The E-Mon D-Mon Class 2000 is an electric submetering device used to measure individual tenant or circuit electricity consumption in commercial and multifamily buildings for billing and energy management purposes. E-Mon D-Mon submeters are now supported under the Honeywell brand following their acquisition of E-Mon. Maintenance documentation may reference either E-Mon D-Mon or Honeywell branding depending on when the equipment was installed.
The LTC-3PN-S2 provides the memory backup power that preserves accumulated demand data, billing records, and meter configuration settings when the meter loses its primary power supply during outages or during meter removal and reinstallation.
PCB-Mount Installation
The LTC-3PN-S2 uses 2 PC pin contacts for direct circuit board mounting. Unlike connector or wire-lead batteries, this cell is soldered directly to the meter's PCB. Replacement requires desoldering the depleted cell from the board and soldering the new LTC-3PN-S2 in its place. This work should be performed by qualified metering technicians or electrical contractors with PCB soldering experience. Follow applicable lockout/tagout and electrical safety procedures when servicing energized or recently energized meter equipment.
Long-Life Performance for Metering Infrastructure
A 10-year shelf life and ultra-low self-discharge rate support infrequent replacement cycles typical of submetering maintenance programs. The rated operating temperature of -40°C to +95°C — the widest upper temperature limit of any battery in this catalog — ensures reliable performance in electrical rooms, utility closets, and outdoor metering enclosures where temperatures can reach extremes that exceed the limits of standard backup cells.
Frequently Asked Questions
What meter is the LTC-3PN-S2 compatible with?
The LTC-3PN-S2 is designed for the E-Mon D-Mon Class 2000 KWH demand submeter. It replaces OEM part number BL-4PN-S2. E-Mon D-Mon submeters are now supported under the Honeywell brand — maintenance documentation may reference either brand name depending on meter vintage.
What does the memory backup battery do in a submeter?
The memory backup battery maintains the meter's accumulated demand data, billing records, and configuration settings when the meter loses primary power — during outages, meter removal, or service. Without a functional backup battery, this data may be lost when the meter is de-energized, requiring reconfiguration and potentially losing unbilled consumption records.
How is this battery installed?
The LTC-3PN-S2 uses PC pin contacts and mounts directly to the meter's PCB via soldering. Replacement requires desoldering the existing cell and soldering the new one in place. This should be performed by qualified metering or electrical technicians. Always follow applicable lockout/tagout and electrical safety procedures when working on meter equipment.
How do I know when the battery needs replacement?
Some E-Mon D-Mon meters provide a low-battery indicator. In the absence of an indicator, replacement on a scheduled cycle — typically aligned with the 10-year shelf life or the utility's meter maintenance interval — is the most reliable approach. If the meter is losing data during outages or producing unexpected readings after a power interruption, a depleted backup battery is a likely cause.
Is this battery rechargeable?
No. The LTC-3PN-S2 is a primary (non-rechargeable) lithium cell. It must be replaced once depleted and should never be connected to a charger.
What is the warranty?
The LTC-3PN-S2 carries a DOA (Dead on Arrival) warranty — standard for primary lithium cells of this type.
Cross Reference & Compatibility
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