Brand: APC | Category: UPS & Power Protection
SKU: BK350EI | Part #: BK350EI | MPN: BK350EI
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The APC Standby Back-UPS (CS) BK350EI is a 350VA standby UPS with four C13 AC outlets and a C14 power inlet. It includes a USB port and a serial connection, and comes with two output IEC jumpers. It has no SmartSlot or SmartConnect port.
The unit provides overload protection and surge protection rated at 310 J, including surge protection for DSL, fax, modem and telephone lines. Audible alarms signal low battery and overload conditions. Listed specifications include 98.6% efficiency, a hold time of 6 to 10 ms, a maximum current of 7 A, 50/60 Hz input frequency, a maximum input operating voltage of 266 V and output frequency regulation of 47 to 63 Hz.
As a compact standby UPS, the BK350EI is suited to small loads such as desktop computers, network equipment and telecom devices in offices and similar environments that need short-term backup power and surge protection.
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| Brand | APC |
| Category | UPS & Power Protection |
| SKU | BK350EI |
| Part Number | BK350EI |
| Condition | New |
| SmartConnect port | No |
| SmartSlot | No |
| USB port | Yes |
| Number of output IEC jumpers | 2 |
| AC outlets quantity | 4 AC outlet(s) |
| Power plug | C14 coupler |
| AC outlet types | C13 coupler |
| Audible alarm modes | Low battery alarm, Overload alarm |
| Audible alarm(s) | Yes |
| Power protection features | Overload |
| Surge protection features | Digital Subscriber Line (DSL), Fax, Modem, Telephone |
| Surge protection | Yes |
| Efficiency | 98.6% |
| Hold time (min) | 6 ms |
| Hold time (max) | 10 ms |
| Surge energy rating | 310 J |
| Maximum current | 7 A |
| Output frequency regulation | 47 - 63 Hz |
| Input frequency | 50/60 Hz |
| Input operation voltage (max) | 266 V |
| Input operation voltage (min) | 180 V |
| Output power | 210 W |
| Output power capacity | 0.35 kVA |
| UPS topology | Standby (Offline) |
| Automatic battery test | Yes |
| Battery recharge time | 6 h |
| Battery life (max) | 6 year(s) |
| Typical backup time at half load | 22.1 min |
| Typical backup time at full load | 8.6 min |
| Battery voltage | 12 V |
| Battery capacity | 116 VAh |
| Battery technology | Sealed Lead Acid (VRLA) |
| LED indicators | Battery replacement |
| Product colour | Beige |
| Cable length | 1.83 m |
| Form factor | Tower |
| Non-operating altitude | 0 - 15000 m |
| Operating altitude | 0 - 3000 m |
| Storage relative humidity (H-H) | 0 - 95% |
| Operating relative humidity (H-H) | 0 - 95% |
The APC Standby Back-UPS (CS), 350VA, IEC(4), USB, Serial delivers conditioned, backed-up power for server rooms and data-center racks. Use cases include short-term ride-through during grid sag/spike events, graceful shutdown of critical compute, and runtime extension via external battery packs.
Key specifications for the APC Standby Back-UPS (CS), 350VA, IEC(4), USB, Serial: new condition; smartconnect port No; smartslot No; usb port Yes; number of output iec jumpers 2; ac outlets quantity 4 AC outlet(s); power plug C14 coupler. Manufacturer part number BK350EI. For the full datasheet with electrical, environmental, and compliance details, contact our pre-sales engineering team.
