APC by Schneider Electric SUA500PDR-H vs APC by Schneider Electric SCL500RM1UC: Specification Comparison
Both the APC SUA500PDR-H and the SCL500RM1UC are 500 VA line-interactive UPS units operating at 120 V AC, placing them squarely in the same power-capacity class. The comparison is meaningful for buyers evaluating compact UPS solutions for industrial control panels, edge networking, or light IT loads — though their form factors diverge sharply: the SUA500PDR-H is a DIN rail-mount unit with hardwire connections aimed at industrial/panel installations, while the SCL500RM1UC is a 1U rack-mount unit with NEMA outlets aimed at IT rack environments.
In This Guide
- Which unit delivers more usable power and surge protection?
- Which unit fits the target installation environment — industrial panel or IT rack?
- Which unit handles a wider input range, and what management options are available?
- Which should you choose: the SUA500PDR-H or the SCL500RM1UC?
- Side-by-Side Specs
- FAQ
Which unit delivers more usable power and surge protection?
The SCL500RM1UC edges ahead on real power output, rated at 400 W versus the SUA500PDR-H's 325 W — a 23% difference that matters when loads approach the unit's ceiling. Both share a 500 VA apparent-power rating.
On surge protection, the SCL500RM1UC again leads with a 680 J surge energy rating compared to 540 J on the SUA500PDR-H — a 26% advantage that offers incrementally better protection against transient spikes.
The SCL500RM1UC also specifies Automatic Voltage Regulation (AVR) and a sine-wave output with 5% voltage regulation, plus a 6 ms transfer-to-battery response time. The SUA500PDR-H does not provide these figures in the supplied specifications, so direct comparison on those dimensions is not possible.
Which unit fits the target installation environment — industrial panel or IT rack?
The SUA500PDR-H is purpose-built for DIN rail mounting with hardwire input (1 × hardwire 3-wire 1PH+N+G) and a hardwire output connector. There are no plug-in NEMA outlets. This makes it the correct choice for industrial control cabinets, machine panels, or building-automation environments where hardwired power distribution is standard and plug-and-play NEMA receptacles are inappropriate.
The SCL500RM1UC occupies a single rack unit (1U) and provides NEMA 5-15R AC outlets, making it a drop-in for standard 19-inch IT racks in server rooms, telecom closets, or network equipment racks. No hardwire capability is specified.
The two units are not interchangeable at the installation level. A buyer choosing between them must first answer which physical environment — panel/DIN or IT rack — the UPS will live in. Getting this wrong means the unit cannot be installed as received.
Which unit handles a wider input range, and what management options are available?
The SUA500PDR-H accepts AC 82–144 V (adjustable to AC 75–154 V), giving it a 62 V standard window and up to a 79 V adjustable window. The SCL500RM1UC operates from 92–139 V, a 47 V window. In environments with significant voltage sag or swell — common in industrial or aging electrical infrastructure — the SUA500PDR-H's broader input tolerance is a meaningful advantage.
For management, the SUA500PDR-H provides an RS-232 port (9-pin DB-9), an EPO (Emergency Power Off) interface, and an SmartSlot expansion bay for optional network management cards. The SCL500RM1UC does not list any management interfaces, remote ports, or expansion slots in the supplied specifications.
Thermally, the SUA500PDR-H is rated 32–122 °F (0–50 °C) operating with 0–95% humidity and emits up to 55 dBA. The SCL500RM1UC specifies a noise level of 45 dBA and includes an audible battery alarm, but operating temperature and humidity ranges are not provided in its specification set.
Which should you choose: the SUA500PDR-H or the SCL500RM1UC?
Our take: The SUA500PDR-H is the stronger choice when the installation is a DIN rail panel, industrial cabinet, or any environment requiring hardwired connections, a broad input voltage window, and built-in remote management capability. The SCL500RM1UC is the correct choice for standard IT rack deployments requiring plug-in NEMA outlets and a 1U footprint. On spec deltas: the SCL500RM1UC delivers 75 W more real power (400 W vs. 325 W), offers 140 J more surge protection (680 J vs. 540 J), and runs 10 dBA quieter (45 dB vs. 55 dBA). Conversely, the SUA500PDR-H has a wider input voltage window (82–144 V vs. 92–139 V), RS-232 plus EPO management interfaces, and an SmartSlot bay — none of which are present on the SCL500RM1UC per supplied specs. These are fundamentally different form-factor products serving different installation contexts; a buyer must select based on physical environment first, then weigh the power and management deltas within that constraint.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | APC by Schneider Electric SUA500PDR-H | APC by Schneider Electric SCL500RM1UC |
|---|---|---|
| Form Factor / Mount Type | DIN rail mountable | 1U rack-mount |
| UPS Topology | Line-interactive | Line-Interactive |
| Apparent Power (VA) | 500 VA | 500 VA |
| Real Power Output (W) | 325 W | 400 W |
| Input Voltage (Nominal) | AC 120 V | 120 V |
| Input Voltage Range (Operating) | AC 82–144 V | 92–139 V |
| Input Voltage Range (Adjustable) | AC 75–154 V | — |
| Output Voltage | AC 120 V | 120 V |
| Output Voltage Regulation | — | 5% |
| Waveform | — | Sine |
| Surge Energy Rating | 540 J | 680 J |
| Transfer / Response Time | — | 6 ms |
| Noise Level | 55 dBA | 45 dB |
| Output Connectors | 1 × hardwire 3-wire (HN+E) | NEMA 5–15R |
| Management Interfaces | RS-232 (DB-9), EPO, SmartSlot | — |
| Recharge Time | 2.5 hours | — |
| Operating Temperature | 32–122 °F (0–50 °C) | — |
| Warranty | Limited — 2 years | — |
Frequently Asked Questions
Which should you choose: the SUA500PDR-H or the SCL500RM1UC?
The SUA500PDR-H is the stronger choice when the installation is a DIN rail panel, industrial cabinet, or any environment requiring hardwired connections, a broad input voltage window, and built-in remote management capability. The SCL500RM1UC is the correct choice for standard IT rack deployments requiring plug-in NEMA outlets and a 1U footprint. On spec deltas: the SCL500RM1UC delivers 75 W more real power (400 W vs. 325 W), offers 140 J more surge protection (680 J vs. 540 J), and runs 10 dBA quieter (45 dB vs. 55 dBA). Conversely, the SUA500PDR-H has a wider input voltage window (82–144 V vs. 92–139 V), RS-232 plus EPO management interfaces, and an SmartSlot bay — none of which are present on the SCL500RM1UC per supplied specs. These are fundamentally different form-factor products serving different installation contexts; a buyer must select based on physical environment first, then weigh the power and management deltas within that constraint.
Can I use the SCL500RM1UC in an industrial control panel instead of the SUA500PDR-H?
No. The SCL500RM1UC is a 1U rack-mount unit with NEMA 5-15R plug-in outlets and no DIN rail mounting or hardwire connection capability per its supplied specifications. The SUA500PDR-H is specifically designed for DIN rail mounting with hardwire 3-wire input and output. Swapping them requires a fundamentally different physical installation.
Which UPS gives me more headroom if my load grows close to 500 VA?
The SCL500RM1UC provides 400 W of real power versus 325 W for the SUA500PDR-H — both at 500 VA apparent power. If your load is measured in watts and is approaching the limit, the SCL500RM1UC offers 75 additional watts of margin. Note that the SCL500RM1UC also specifies AVR and 5% output voltage regulation, which are not confirmed in the SUA500PDR-H's supplied specs.
Which unit supports remote monitoring or network management cards?
Only the SUA500PDR-H, per the supplied specifications. It includes an RS-232 (DB-9) management port, an EPO interface, and an SmartSlot expansion bay that accepts optional APC network management cards. The SCL500RM1UC does not list any management interfaces or expansion slots in its specification data.
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