PoE SwitchesHPE Networking
- 8× 2.5G Class 6
- 600 W budget
- 200 Gbps
HPE Networking · PoE Switches
S4A34A – HPE Networking Instant On Switch 48p Gigabit CL4 PoE 4p SFP+ 370W 1940
Forty-eight port rack switch with Class 4 PoE on every port, a 370 W budget and four 1/10G SFP+ uplinks.
PricingContact for Best Price
- PoE ports
- 48× GbE Class 4 PoE (ports 1–48)
- Uplinks
- 4× 1/10G SFP+ (ports 49–52)
- PoE budget
- 370 W
- Per-port PoE
- Up to 30 W (Class 4)
- Switching capacity
- 176 Gbps
- Packet buffer
- 4 MB
- Ready Stock
- PAN India Supply
- Same Day Dispatch*
- GST Billing
- BOQ Assistance
*Same-day dispatch applies to in-stock items ordered before cut-off from the Delhi NCR warehouse.
Key Features
What the S4A34A is built to do
Technical Specifications
S4A34A specifications
Specifications as published for this model. Confirm project-critical values against the datasheet before ordering.
| Ports | |
|---|---|
| PoE ports | 48× RJ-45 autosensing 10/100/1000BASE-T with IEEE 802.3af/at Class 4 PoE (ports 1–48) |
| Uplink | 4× SFP+ 1/10GbE ports (ports 49–52) |
| Standards | IEEE 802.3 Type 10BASE-T, IEEE 802.3u Type 100BASE-TX, IEEE 802.3ab Type 1000BASE-T |
| Duplex | 10BASE-T/100BASE-TX: half or full; 1000BASE-T: full only |
| Console port | 1× USB-C console port |
| PoE | |
|---|---|
| Total PoE budget | 370 W Class 4 PoE |
| PoE port count | 48 of 48 access ports |
| Per-port maximum | Up to 30 W (IEEE 802.3at) |
| Standards | IEEE 802.3af / 802.3at |
| Scheduling | PoE scheduling via global schedules (up to 3) |
| Performance | |
|---|---|
| Switching capacity | 176 Gbps |
| Throughput | 131 Mpps @ 64-byte packets |
| Latency (100 Mb, LIFO) | < 6.5 µs |
| Latency (1000 Mb, LIFO) | < 2.7 µs |
| Latency (10000 Mb, LIFO) | < 0.75 µs |
| MTBF | 108 years |
| Scale | |
|---|---|
| MAC address table | 16,000 entries |
| Maximum VLANs | 256 (VLAN IDs 1–4093) |
| IPv4 host table (ARP) | 509 entries |
| IPv4 unicast static routes | 32 |
| Routing table | 32 IPv4 static entries |
| IGMP groups | 1K |
| IPv4/MAC ACL entries (ingress) | 100 |
| Maximum ACEs | 2048 |
| Jumbo frames | Up to 9216 bytes |
| IPv4/MAC ACL entries (egress) | 512 |
| Link aggregation groups | 16 (8 members per group) |
| Processor and Memory | |
|---|---|
| Processor | ARM Cortex-A9 @ 1.25 GHz |
| SDRAM | 1 GB |
| Flash | 512 MB |
| Packet buffer | 4 MB |
| Physical | |
|---|---|
| Dimensions (D × W × H) | 14.44 × 17.48 × 1.73 in (36.70 × 44.40 × 4.40 cm) |
| Weight | 10.69 lb (4.85 kg) |
| Fans | 3 fixed fans, non field-replaceable |
| Primary airflow | Left to right |
| Acoustics | Sound power LWAd = 3.4 Bel; bystander sound pressure LpAm = 20 dB |
| Mounting | EIA-standard 19 in. rack or cabinet (2-post kit included); table-top; rack; wall; under-table |
| Electrical | |
|---|---|
| Power supply type | Internal power supply |
| AC voltage | 100–127 VAC / 200–240 VAC |
| Frequency | 50 Hz / 60 Hz |
| Current | 4.70 / 2.36 A |
| Power consumption (100% traffic) | 100–127 V: 55.6 W; 200–220 V: 54.4 W |
| Power consumption (100% traffic + 100% PoE) | 100–127 V: 466.1 W; 200–220 V: 452.6 W |
| Power consumption (idle) | 100–127 V: 26.4 W; 200–220 V: 25.8 W |
| Heat dissipation (100% traffic + 100% PoE) | 100–127 V: 1590.3 BTU/hr, 1677.9 kJ/hr; 200–220 V: 1544.2 BTU/hr, 1629.2 kJ/hr |
| Environment | |
|---|---|
| Operating temperature | 32 °F to 104 °F (0 °C to 40 °C) |
| Storage temperature | −40 °F to 158 °F (−40 °C to 70 °C) |
| Operating humidity | 15% to 95% @ 104 °F (40 °C), non-condensing |
| Storage humidity | 15% to 95% @ 140 °F (60 °C), non-condensing |
| Altitude | Up to 10,000 ft (3 km) |
| Layer 2 Switching | |
|---|---|
| Spanning tree | 802.1D STP, 802.1w RSTP, 802.1s MSTP (local web only, up to 8 instances), BPDU filtering, loop protection |
| Flow control | IEEE 802.3x, symmetric and asymmetric |
| Link aggregation | LACP or static, up to 16 LAGs with up to 8 ports each depending on model |
| Multicast | IGMP v1, v2, v3 snooping |
| Discovery | LLDP and LLDP-MED |
| Monitoring | Port mirroring and RSPAN |
| Auto VLAN | Auto-detects access points and cameras into pre-defined VLANs |
| Auto recovery | Returns a port or service online after an error condition |
| Layer 3 Routing | |
|---|---|
| Static IPv4 routing | Up to 32 IPv4 routing interfaces and 32 IPv4 static routes |
| Address assignment | Manual or DHCP, per port or per VLAN |
| ARP | Dynamic and manual entries |
| IPv6 | IPv6 Host mode |
| Quality of Service | |
|---|---|
| Classification | CoS by IEEE 802.1p or DSCP; Global Trust Mode |
| Queue scheduling | Weighted round robin (WRR) or strict priority (SP) |
| Traffic shaping | Per-port egress bandwidth limit |
| Rate limiting | Broadcast, multicast and unicast thresholds with port shutdown or SNMP trap |
| Auto-voice VLAN | Detects SIP, H.323 and SCCP or by OUI |
| Security | |
|---|---|
| Hardware root of trust | TPM 2.0 |
| Port authentication | IEEE 802.1X |
| AAA | RADIUS, TACACS+ or local database |
| RADIUS servers | Up to 2, with RADIUS-assigned dynamic VLANs and accounting |
| DoS protection | Automatic denial-of-service protection |
| Access control | ACLs with MAC and IP filtering; time-based ACLs |
| Management | |
|---|---|
| Options | Instant On Cloud Portal; Mobile App; Web Browser; SNMP Manager; DOCs (Telnet, SSH); Console Port (USB-C) |
| Local web sessions | Up to 5 HTTP / HTTPS |
| Devices per site | Up to 125 |
| Scheduling | Up to 3 global schedules for ACLs, port shutdown or PoE |
| Diagnostics | Event logging and alerts, locator LED, port mirroring |
| Supported Transceivers (1G SFP) | |
|---|---|
| S0G20A | Instant On 1G LX SFP LC 10 km SMF transceiver |
| R9D16A | Instant On 1G SFP LC SX 500 m OM2 MMF transceiver |
| R9D17A / R9D17B | Instant On 1G SFP RJ45 100 m Cat5e transceiver |
| Supported Transceivers (10G SFP+) | |
|---|---|
| S0G21A | Instant On 10G LR SFP+ LC 10 km SMF transceiver |
| S0G18A | Instant On 10GBASE-T RJ45 30 m Cat6a transceiver |
| R9D18A | Instant On 10G SFP+ LC SR 300 m OM3 MMF transceiver |
| R9D19A / R9D20A | Instant On 10G SFP+ to SFP+ 1 m / 3 m direct attach copper cable |
| Compliance & Warranty | |
|---|---|
| Safety | EN/IEC 62368-1 2nd & 3rd Ed.; UL 62368-1 3rd Ed.; CAN/CSA C22.2 No. 62368-1 3rd Ed.; EN/IEC 60825-1:2014 Class 1 |
| Emissions | EN 55032:2015/CISPR 32 Class A; FCC CFR 47 Part 15:2018 Class A; ICES-003 Class A; VCCI-32 Class A; CNS 13438 Class A; KS C 9832 Class A; AS/NZS CISPR 32 Class A |
| Immunity | BS/EN 55035, CISPR 35, KS C 9835; IEC 61000-4-2/-3/-4/-5/-6/-8/-11 |
| Warranty | HPE Networking Instant On limited lifetime; chat support for the life of the product |
Specifications sourced from the official HPE Networking catalogue. Where official pages disagree on a value, it is marked and confirmed during quotation.
Overview
About the S4A34A
The HPE Networking Instant On Switch 48p Gigabit CL4 PoE 4p SFP+ 370W 1940 (S4A34A) is a 48-port smart-managed Layer 2+ gigabit switch in which every access port supplies IEEE 802.3af/at Class 4 PoE within a 370 W budget, plus four SFP+ uplinks at 1G or 10G.
Compared with the 1840 generation's 48-port PoE model, which powers 24 of its 48 ports from the same 370 W, this one powers all 48. The budget is unchanged, so the per-port average halves to roughly 7.7 W — the trade is flexibility in where powered devices land rather than more total wattage.
It carries the 48-port platform: 176 Gbps switching, 131 Mpps forwarding and a 4 MB packet buffer, with 8-member link aggregation. Three fixed fans handle the combined load at 3.4 Bel, and full traffic with full PoE draws 466.1 W.
Applications
Where the S4A34A is deployed
Downloads
S4A34A documents
Datasheets and manuals are shared without sign-up. Documents not yet hosted online are sent on request within working hours.
- HPE Networking Instant On Switch Series 1940 QuickSpecs (PDF)Download
Related Products
Pairs with the S4A34A
Edge PoE switches below it, SFP+ modules in its uplinks, and sibling models for smaller or larger sites.
- PoE Switches
Managed Switches- 48× GbE
- 4× 1/10G SFP+
- 176 Gbps
PoE Switches- 24× GbE PoE
- 240 W budget
- 4× SFP+
Before You Enquire
Frequently asked questions
How many ports on the S4A34A supply PoE?
All 48. Every access port supplies IEEE 802.3af/at Class 4 PoE at up to 30 W, drawing from a shared 370 W budget.
How does this compare with the 1840 S5E31A at the same 370 W?
The S5E31A powers 24 of its 48 ports; the S4A34A powers all 48 from the same 370 W budget. Total wattage is identical, so the gain is placement flexibility rather than capacity. The 1940 also lifts switching from 104 Gbps to 176 Gbps and moves the uplinks from 1G SFP to 1/10G SFP+.
Compare the S5E31AWhat circuit does the S4A34A need at full load?
At 100% traffic with 100% PoE it draws 466.1 W at 100–127 V or 452.6 W at 200–220 V, with a rated current of 4.70 / 2.36 A and heat dissipation of 1590.3 BTU/hr.
S4A34A or S4A35A?
The S4A34A gives 48 gigabit Class 4 PoE ports and 370 W. The S4A35A replaces eight of them with 2.5G Smart Rate ports carrying Class 6 PoE at up to 60 W and lifts the budget to 600 W. Choose the S4A35A where multi-gigabit access points are planned.
Compare the S4A35AWhat is the price of the HPE S4A34A in India?
Pricing is quotation-based with dealer slabs for registered partners. Name the S4A34A and quantity in a quote request and you receive priced options with confirmed availability within 24 working hours.
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