Honeywell TC-BATT03 | 3.6V Lithium Battery Assembly

Product Overview

This battery assembly provides backup power for Honeywell control system memory and real-time clock functions. Process facilities require reliable energy storage to preserve critical configuration data during outages. The TC-BATT03 connects directly to the main processor module through a dedicated header. Its lithium chemistry delivers stable voltage output over an extended service life. Plant engineers can replace this unit without interrupting normal system operation. The assembly’s compact form factor suits space-constrained control cabinet installations.

Technical Specifications

Parameter	Specification
Battery Chemistry	Lithium thionyl chloride (Li-SOCl₂)
Nominal Voltage	3.6 VDC
Rated Capacity	2400 mAh
Continuous Discharge Current	130 mA maximum
Pulse Discharge Current	400 mA (for 1 second)
Operating Temperature	–40°C to +85°C
Storage Life	10 years (at 25°C)
Service Life in Application	5–7 years (typical)
Replacement Interval	5 years recommended
Connector Type	2-pin polarized header with locking latch
Wire Length	150 mm ±10 mm
Dimensions (Battery Cell)	34 mm diameter x 61 mm height
Total Assembly Weight	0.12 kg
Safety Certifications	UL 1642, IEC 60086-4

Energy Storage and Discharge Characteristics

The TC-BATT03 stores 8.64 watt-hours of total electrical energy at nominal voltage. Its low self-discharge rate preserves over 90% of original capacity after five years. The assembly delivers stable 3.6-volt output throughout most of its discharge curve. Pulse current capability supports brief high-drain events during memory write cycles. The battery’s internal impedance remains below 5 ohms across the operating temperature range.

Mechanical Design and Installation

The cylindrical cell mounts inside a protective shrink-wrap sleeve with strain-relief wiring. A polarized 2-pin connector prevents reverse polarity installation errors. The locking latch secures the connection against vibration-induced disconnection. This assembly weighs only 120 grams for easy handling during replacement. The 150-millimeter flexible lead accommodates various mounting orientations inside cabinets.

Safety and Protection Features

Built-in pressure relief vents prevent explosive failure under abnormal conditions. The lithium chemistry includes flame-retardant electrolyte for added safety. Reverse current blocking diodes prevent charging of the primary battery. The assembly meets rigorous UN 38.3 transportation safety requirements. Insulated leads eliminate short-circuit risks during handling and installation.

Monitoring and Replacement Indication

The connected processor continuously monitors battery voltage through an analog input. A low-voltage threshold triggers an alert when capacity approaches depletion. Status LEDs on the processor indicate battery health at a glance. The system logs replacement dates for preventive maintenance scheduling.