Product comparison · 2 uninterruptible power supplies (upss)

APC J35B uninterruptible power supply (UPS) 1.5 kVA vs APC S20BLK uninterruptible power supply (UPS) 1.8 kVA 12 AC outlet(s)

28specifications compared
16differ
12identical
14known for one product only

Key differences

Output power capacity
- J35B uninterruptible power supply (UPS) 1.5 kVA:1.5 kVA
- S20BLK uninterruptible power supply (UPS) 1.8 kVA 12 AC outlet(s):1.8 kVA
EMI/RFI noise filtering
- J35B uninterruptible power supply (UPS) 1.5 kVA:45 dB
- S20BLK uninterruptible power supply (UPS) 1.8 kVA 12 AC outlet(s):Yes
AC outlets quantity
- J35B uninterruptible power supply (UPS) 1.5 kVA:8 AC outlet(s)
- S20BLK uninterruptible power supply (UPS) 1.8 kVA 12 AC outlet(s):12 AC outlet(s)
Modem (RJ-11) ports
- J35B uninterruptible power supply (UPS) 1.5 kVA:2
- S20BLK uninterruptible power supply (UPS) 1.8 kVA 12 AC outlet(s):3
Storage temperature (T-T)
- J35B uninterruptible power supply (UPS) 1.5 kVA:-15 - 40 °C
- S20BLK uninterruptible power supply (UPS) 1.8 kVA 12 AC outlet(s):-15 - 45 °C
Operating relative humidity (H-H)
- J35B uninterruptible power supply (UPS) 1.5 kVA:0 - 95%
- S20BLK uninterruptible power supply (UPS) 1.8 kVA 12 AC outlet(s):5 - 95%
Storage relative humidity (H-H)
- J35B uninterruptible power supply (UPS) 1.5 kVA:0 - 95%
- S20BLK uninterruptible power supply (UPS) 1.8 kVA 12 AC outlet(s):5 - 95%
Non-operating altitude
- J35B uninterruptible power supply (UPS) 1.5 kVA:0 - 3000 m
- S20BLK uninterruptible power supply (UPS) 1.8 kVA 12 AC outlet(s):0 - 15000 m

Side by side

Differences highlightedShow differences only

Comparison of J35B, S20BLK
42 specifications	A APC J35B uninterruptible power supply (UPS) 1.5 kVA Model J35B View product	B APC S20BLK uninterruptible power supply (UPS) 1.8 kVA 12 AC outlet(s) Model S20BLK View product
Features2 differ
Output power capacityDiffers	1.5 kVA	1.8 kVA
Output powerKnown for one	865 W	Unknown — not stated by the source
Input frequency	50/60 Hz	50/60 Hz
Output operation voltage (max)Known for one	120 V	Unknown — not stated by the source
EMI/RFI noise filteringDiffers	45 dB	Yes
Surge protection featuresKnown for one	Coax, Network, Telephone	Unknown — not stated by the source
Ports & interfaces2 differ
AC outlet types	NEMA 5–15R	NEMA 5–15R
Power plug	C14 coupler	C14 coupler
AC outlets quantityDiffers	8 AC outlet(s)	12 AC outlet(s)
USB 2.0 ports quantity	1	1
Modem (RJ-11) portsDiffers	2	3
RS-232 portsKnown for one	Unknown — not stated by the source	1
Ethernet LAN (RJ-45) portsKnown for one	Unknown — not stated by the source	1
Batteryidentical
Number of battery cellsKnown for one	1	Unknown — not stated by the source
Battery recharge timeKnown for one	16 h	Unknown — not stated by the source
Designidentical
Form factor	Rackmount	Rackmount
Product colour	Black	Black
Display type	LCD	LCD
LED indicators	Yes	Yes
Rack capacityKnown for one	Unknown — not stated by the source	3U
Cable lengthKnown for one	Unknown — not stated by the source	3 m
Operational conditions4 differ
Operating temperature (T-T)	0 - 40 °C	0 - 40 °C
Storage temperature (T-T)Differs	-15 - 40 °C	-15 - 45 °C
Operating relative humidity (H-H)Differs	0 - 95%	5 - 95%
Storage relative humidity (H-H)Differs	0 - 95%	5 - 95%
Operating altitude	0 - 3000 m	0 - 3000 m
Non-operating altitudeDiffers	0 - 3000 m	0 - 15000 m
Certificates1 differ
Compliance certificatesKnown for one	RoHS	Unknown — not stated by the source
CertificationDiffers	FCC 15 B, UL 1778	CSA, FCC 15 B, UL 1778
Weight & dimensions4 differ
WidthDiffers	431 mm	432 mm
DepthDiffers	406 mm	483 mm
HeightDiffers	97 mm	133 mm
WeightDiffers	14 kg	28.2 kg
Packaging data1 differ
Package weightDiffers	16 kg	34.5 kg
Other features2 differ
Battery typeKnown for one	Lead-Acid	Unknown — not stated by the source
Input connection typeDiffers	C14	IEC-320 C14
Nominal input voltage	120 V	120 V
Nominal output voltageKnown for one	120 V	Unknown — not stated by the source
Operating temperature (T-T)	32 - 104 °F	32 - 104 °F
Package dimensions (WxDxH)Differs	558 x 539 x 205 mm	513 x 594 x 335 mm
Output connectionsKnown for one	Unknown — not stated by the source	NEMA 5–15R
Dimensions (WxDxH)Known for one	Unknown — not stated by the source	432 x 483 x 133 mm

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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