CSB MSJ-400 2V 400Ah VRLA-AGM Telecom Backup Battery

Product Features

Valve Regulated Lead Acid (VRLA) design
Absorbent Glass Mat (AGM) technology, maintenance-free with up to 99% gas recombination efficiency
Constructed with pure lead and proprietary elements
Engineered 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
Emergency backup power for optical access network central offices
DC power supply for microwave relay stations
48V DC power systems in telecom equipment rooms
Backup power support for broadband access equipment
Backup power solutions for mobile communication core networks

Product parameters

Model：MSJ-400
Voltage：2 Vdc
Nominal Capacity：400 Ah @10hr-rate
Ah Capacity：405.60 (8-Hr 1.75 VPC @ 25°C)
Ah Capacity：420.00 (20-Hr 1.75 VPC @ 25°C)
Ah Capacity：394.40 (8-Hr 1.80 VPC @ 25°C)
Max. Charge Current：120.00 A
Max. Discharge Current：2400 A
Short Circuit Current：6065 A
Internal Resistance：0.30 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：28.60 / 63.03 kg / lb.
Width (W)：170.0±2.0 / 6.69±0.08 mm / in
Height (H)：339.0±2.5 / 13.15±0.10 mm / in
Depth (D)：197.0±2.0 / 7.76±0.08 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-400 belongs to the MSJ series and is a 2V Valve Regulated Sealed Lead Acid Battery. It uses AGM Absorbent Glass Mat technology with a gas recombination efficiency of up to 99% and is maintenance-free. This series is built for high-capacity, long float life backup power in the telecom communications industry. Its nominal voltage is 2Vdc; at 25°C and 1.80VPC, the 10-hour rate nominal capacity is 400Ah; at 25°C and 1.75VPC, the 8-hour rate capacity is 405.60Ah and the 20-hour rate capacity is 420.00Ah; at 25°C and 1.80VPC, the 8-hour rate capacity is 394.40Ah. In terms of electrical parameters, the MSJ-400 has a maximum charge current of 120.00A, a maximum discharge current of 2400A, a short-circuit current of 6065A, and an internal resistance of 0.30 mΩ. At 25°C, the float charge voltage is 2.21 to 2.25 Vdc/battery, and the equalization charge voltage is 2.35 Vdc/battery. Self-discharge characteristics: stored at 25°C for 90 days, the remaining capacity is above 90%; it can be stored for up to 6 months at 25°C, and must be fully charged before use; if the storage temperature exceeds 25°C, a supplementary charge is required in advance. In terms of construction, the MSJ-400 uses a pure lead construction and proprietary formulation elements, with a flame-retardant ABS case (UL 94-V0). The terminal uses an I4 threaded copper alloy, compatible with M8 bolts, with a terminal torque of 126±25 Kgf·cm, 109±22 Lbf·in, or 12.3±2.5 N·m. Dimensions: width 170.0±2.0 mm, height 339.0±2.5 mm, depth 197.0±2.0 mm; weight 28.60 kg (63.03 lb). In terms of temperature conditions, the nominal temperature is 25°C; the discharge temperature range is -15°C to 50°C, and the charge and storage temperature range is -15°C to 40°C. In terms of design life, float backup service at 25°C can reach 20 years, and under the Eurobat (20°C) standard it exceeds 12 years, placing it in the Very Long Life category. The product is manufactured in accordance with IEC 60896-21/22:2004 and is UL1989 recognized (MH14533). Based on the above characteristics, the MSJ-400 can be used for float backup power in telecom communications equipment rooms, supplying high-capacity backup systems in a 2V cell form; its long-life design and maintenance-free AGM construction suit scenarios requiring long-term float operation.