PoE SwitchesHPE Networking
- 8× 2.5G Class 6
- 600 W budget
- 200 Gbps
HPE Networking · PoE Switches
S4A32A – HPE Networking Instant On Switch 20p Gigabit CL4 4p SR2.5G CL6 PoE 4p SFP+ 370W 1940
Twenty-four port switch mixing four 2.5G Smart Rate Class 6 ports with twenty gigabit Class 4 ports and a 370 W budget.
PricingContact for Best Price
- Smart Rate ports
- 4× 2.5G Class 6 PoE (ports 1–4)
- Gigabit PoE ports
- 20× GbE Class 4 PoE (ports 5–24)
- Uplinks
- 4× 1/10G SFP+ (ports 25–28)
- PoE budget
- 370 W
- Switching capacity
- 140 Gbps
- Throughput
- 104 Mpps
- 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 S4A32A is built to do
Technical Specifications
S4A32A specifications
Specifications as published for this model. Confirm project-critical values against the datasheet before ordering.
| Ports | |
|---|---|
| Smart Rate PoE ports | 4× RJ-45 autosensing 100M/1G/2.5GBASE-T with IEEE 802.3af/at/bt Class 6 PoE (ports 1–4) |
| Gigabit PoE ports | 20× RJ-45 autosensing 10/100/1000BASE-T with IEEE 802.3af/at Class 4 PoE (ports 5–24) |
| Standards | IEEE 802.3 Type 10BASE-T, IEEE 802.3u Type 100BASE-TX, IEEE 802.3ab Type 1000BASE-T, IEEE 802.3bz Type 2500BASE-T |
| Duplex | 10BASE-T/100BASE-TX: half or full; 1000BASE-T/2500BASE-T: full only |
| Uplink | 4× SFP+ 1/10GbE ports (ports 25–28) |
| Console port | 1× USB-C console port |
| PoE | |
|---|---|
| Total PoE budget | 370 W Class 4 / Class 6 PoE |
| Class 6 ports | Ports 1–4 (2.5G Smart Rate), up to 60 W each |
| Class 4 ports | Ports 5–24 (gigabit), up to 30 W each |
| Standards | IEEE 802.3af / 802.3at / 802.3bt |
| Scheduling | PoE scheduling via global schedules (up to 3) |
| Performance | |
|---|---|
| Switching capacity | 140 Gbps |
| Throughput | 104 Mpps @ 64-byte packets |
| Latency (100 Mb, LIFO) | < 5.9 µs |
| Latency (1000 Mb, LIFO) | < 1.7 µs |
| Latency (2500 Mb, LIFO) | < 5.4 µs |
| Latency (10000 Mb, LIFO) | < 0.82 µs |
| MTBF | 67 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 (4 members per group) |
| Processor and Memory | |
|---|---|
| Processor | ARM Cortex-A9 @ 1.25 GHz |
| SDRAM | 1 GB |
| Flash | 512 MB |
| Packet buffer | 2 MB |
| Physical | |
|---|---|
| Dimensions (D × W × H) | 14.44 × 17.48 × 1.73 in (36.70 × 44.40 × 4.40 cm) |
| Weight | 9.65 lb (4.38 kg) |
| Fans | 2 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 | 4.53 / 2.28 A |
| Power consumption (100% traffic) | 100–127 V: 39.6 W; 200–220 V: 39.4 W |
| Power consumption (100% traffic + 100% PoE) | 100–127 V: 453.0 W; 200–220 V: 446.7 W |
| Power consumption (idle) | 100–127 V: 18.4 W; 200–220 V: 18.1 W |
| Heat dissipation (100% traffic + 100% PoE) | 100–127 V: 1545.6 BTU/hr, 1630.7 kJ/hr; 200–220 V: 1524.3 BTU/hr, 1608.2 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 S4A32A
The HPE Networking Instant On Switch 20p Gigabit CL4 4p SR2.5G CL6 PoE 4p SFP+ 370W 1940 (S4A32A) is a 24-port smart-managed Layer 2+ switch with a split access layer: four Smart Rate ports at 100M/1G/2.5G carrying Class 6 PoE, and twenty gigabit ports carrying Class 4 PoE, within a shared 370 W budget.
That split is designed around modern wireless. A Wi-Fi 6E or Wi-Fi 7 access point can saturate a gigabit uplink and draw more than 30 W, so the four 2.5G Class 6 ports take the access points at up to 60 W each, while the twenty gigabit Class 4 ports serve cameras, phones and desks. It removes the need for a separate multi-gig switch alongside a PoE switch.
Switching capacity is 140 Gbps with 104 Mpps forwarding, and 2.5G latency is rated under 5.4 µs. Four SFP+ uplinks run at 1G or 10G. At full traffic with full PoE it draws 453.0 W across two fixed fans rated at 3.4 Bel.
Applications
Where the S4A32A is deployed
Downloads
S4A32A 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 S4A32A
Edge PoE switches below it, SFP+ modules in its uplinks, and sibling models for smaller or larger sites.
- PoE Switches
PoE Switches- 24× GbE PoE
- 240 W budget
- 4× SFP+
PoE Switches- 8× 10GBASE-T
- 120 W Class 6
- 2× SFP+
Before You Enquire
Frequently asked questions
What does Smart Rate mean on the S4A32A?
Smart Rate is HPE's term for multi-gigabit copper ports. On the S4A32A, ports 1 to 4 autosense 100M, 1G and 2.5G over standard cabling, so a Wi-Fi 6E or Wi-Fi 7 access point can exceed gigabit without new cable.
Which ports carry Class 6 PoE?
Ports 1 to 4 — the 2.5G Smart Rate ports — carry IEEE 802.3bt Class 6 PoE at up to 60 W. Ports 5 to 24 carry Class 4 PoE at up to 30 W. Both draw from the shared 370 W budget.
S4A32A or S4A35A — which Smart Rate model?
The S4A32A is a 24-port unit with four 2.5G Class 6 ports and a 370 W budget. The S4A35A is a 48-port unit with eight 2.5G Class 6 ports and a 600 W budget. Choose by total port count and how many multi-gig access points the site needs.
Compare the S4A35AWhat circuit does the S4A32A need at full load?
At 100% traffic with 100% PoE it draws 453.0 W at 100–127 V or 446.7 W at 200–220 V, with a rated current of 4.53 / 2.28 A and heat dissipation of 1545.6 BTU/hr.
What is the price of the HPE S4A32A in India?
Pricing is quotation-based with dealer slabs for registered partners. Name the S4A32A and quantity in a quote request and you receive priced options with confirmed availability within 24 working hours.
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