CSB Battery MSJ-500 VRLA 2V 500Ah
Designed for telecom float backup power requirements, CSB introduces the MSJ-500, a 2V valve regulated sealed lead acid (VRLA-AGM) battery. It offers a nominal capacity of 500Ah (10-hour rate, 1.80VPC@25°C) and a design float life of up to 20 years. The case is made of flame-retardant ABS, and the terminals are constructed from copper alloy.
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Product Features
- VRLA (Valve Regulated Lead Acid) battery
- Maintenance-free, with AGM Absorbent Glass Mat technology achieving up to 99% gas recombination efficiency
- Pure lead construction with proprietary elements
- Purpose-built for high-capacity float charge backup power applications
- Manufactured to IEC 60896-21/22:2004, UL1989 certified (MH14533)
Application Scenarios
- Provides DC backup power for telecom base stations
- Uninterruptible backup for optical access network central office equipment
- DC power supply for microwave relay stations
- 48V DC system support in telecom equipment rooms
- Backup power solution for broadband access equipment
- Backup power support for mobile communication core networks
Product parameters
- Model：MSJ-500
- Voltage：2 Vdc
- Nominal Capacity：500 Ah @10hr-rate
- Ah Capacity：506.40 (8-Hr 1.75 VPC @ 25°C)
- Ah Capacity：524.00 (20-Hr 1.75 VPC @ 25°C)
- Ah Capacity：493.60 (8-Hr 1.80 VPC @ 25°C)
- Max. Charge Current：150.00 A
- Max. Discharge Current：3000 A
- Short Circuit Current：9953 A
- Internal Resistance：0.28 mΩ
- Terminal Type：I4 thread copper alloy terminal to accept M8 bolt
- Terminal Torque：126±25 Kgf·cm / 109±22 Lbf·in / 12.3±2.5 N·m
- Container Material：Flame-retardant ABS (UL 94-V0)
- Weight：36.50 / 80.45 kg / lb.
- Width (W)：171.0±2.0 / 6.73±0.08 mm / in
- Height (H)：339.0±2.5 / 13.15±0.10 mm / in
- Depth (D)：241.0±2.5 / 9.49±0.10 mm / in
- Design Life：Up to 20 years in standby service at 25°C; Eurobat (20°C): >12 years, Very Long Life
- Float Charging Voltage：2.21 ~ 2.25 Vdc/battery
- Equalizing Charging Voltage：2.35 Vdc/battery
- Operating Temperature：discharge -15°C to 50°C; charge/storage -15°C to 40°C
Product details
The CSB MSJ-500 belongs to the MSJ series and is a 2V VRLA-AGM valve regulated sealed lead acid battery officially designated for telecom applications. This series focuses on VRLA 2V high capacity and extended service life for telecom scenarios, with a design life of up to 20 years in standby float service. The product utilizes valve regulated sealed lead acid construction and Absorbent Glass Mat (AGM) technology, achieving a gas recombination efficiency of up to 99%. It features a maintenance-free design and uses pure lead construction with proprietary elements.
In terms of capacity, the MSJ-500 has a nominal capacity of 500Ah, tested at 1.80VPC, 25°C, 10-hour rate. Other capacity data are as follows: 506.40Ah at 8-hour rate, 1.75VPC, 25°C; 524.00Ah at 20-hour rate, 1.75VPC, 25°C; and 493.60Ah at 8-hour rate, 1.80VPC, 25°C. Maximum charge current is 150.00A, maximum discharge current is 3000A, short-circuit current is 9953A, and internal resistance is 0.28mΩ.
For electrical and temperature parameters, at 25°C the float charge voltage ranges from 2.21 to 2.25Vdc/battery, and the equalization charge voltage is 2.35Vdc/battery (25°C). Nominal operating temperature is 25°C, discharge temperature range is -15°C to 50°C, and charge and storage temperature range is -15°C to 40°C. Self-discharge performance: less than 10% after 90 days storage at 25°C, with a maximum storage of 6 months; a full charge is required before use, and if storage temperature exceeds 25°C, an earlier charge is needed.
Structural details: The MSJ-500 is equipped with I4 threaded copper alloy terminals compatible with M8 bolts, with a terminal torque of 126±25 Kgf·cm, 109±22 Lbf·in, or 12.3±2.5 N·m. The case is flame-retardant ABS material meeting UL 94-V0. Weight is 36.50kg (80.45 lb), width is 171.0±2.0mm, height is 339.0±2.5mm, and depth is 241.0±2.5mm. The product is manufactured according to IEC 60896-21/22:2004 and recognized under UL1989 (MH14533).
The MSJ-500 is suitable for high-capacity float backup power applications in the telecom field. In 25°C standby float service, its design life can reach 20 years; according to the Eurobat standard, it exceeds 12 years at 20°C and is classified as Very Long Life. The maintenance-free AGM technology and valve regulated sealed construction reduce maintenance requirements in float backup scenarios, making it ideal for telecom facilities requiring long-term reliable backup power.
