NQ442L2C - 225A NQ Panelboard Interior, 42-Pole | Schneider Electric
料号： NQ442L2C ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $542 | $542.00 |
| 5 | $488 | $2,440.00 |
| 10 | $435 | $4,350.00 |
| 25 | $388 | $9,700.00 |
| 50 | $352 | $17,600.00 |
NQ442L2C 概述
A panelboard interior is the central assembly of a power distribution panelboard that mounts the bus structure, branch breakers, and neutral/ground hardware inside an enclosure. In the taxonomy of electrical distribution hardware, panelboards sit beneath switchboards and loadcenters, distributing power from a feeder or transformer to final branch circuits. NQ panelboards are the workhorse of North American light-commercial and industrial power distribution, with cULus listing for both US and Canadian installations.
Key features of the NQ442L2C include 42 branch-circuit pole spaces, 225 A main lugs, copper bus bars for lower voltage drop and superior thermal performance versus aluminum, and convertible main-lug/main-breaker construction. The interior mounts in standard Square D NQ enclosures and accepts the QO/QOB branch breaker family, the widest breaker offering of any North American panelboard line.
Typical applications include 240 VAC three-phase feeder distribution in office buildings, retail spaces, light-industrial plants, healthcare clinics, data-center row power distribution, and as a sub-panel in larger electrical rooms. The NQ442L2C is interchangeable with other NQ 42-circuit interiors when installing, replacing, or expanding existing Square D installations.
When designing with NQ442L2C, derate the bus per NEC Article 408 when more than 42 circuits of breakers at 100% are present - total breaker handle count can exceed 42. Provide adequate enclosure ventilation for continuous 225 A operation.
直接替换替代料： NQ442L2C ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
NQ454L2C
✅ 直接替换📋 参考替代料（不在目录中）
NQ442L4C
✅ 直接替换📋 参考替代料（不在目录中）
NQ430L2C
✅ 直接替换📋 参考替代料（不在目录中）
NQ442L2C-N
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
NQ442L2C-CUL
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
NQ442L2C 最大额定值与电气特性
| Product Type | Panelboard Interior |
| 品牌 | Schneider Electric / Square D |
| Series | NQ |
| Main Ampere Rating | 225 A |
| Number of Pole Spaces | 42 |
| Bus Material | Copper (Cu) |
| Main Type | Main Lugs (convertible to Main Breaker) |
| Phases | 3 Phase |
| Wires | 4 Wire |
| Voltage Rating (AC) | 240 VAC |
| Voltage Rating (DC) | 48 VDC |
| Compatible Breakers | QO, QOB bolt-on |
| Neutral Rating | 200% rated for non-linear loads |
| Standards | cULus (US and Canada) |
| Mounting | Surface or Flush enclosure |
| 库存状态 | Normally stocked in distribution facility |
NQ442L2C standard 引脚配置指南
NQ442L2C（standard 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： NQ442L2C.
请参阅 数据手册 以查看完整引脚配置。
典型应用
NQ442L2C 适用于 6 应用s: Light-Commercial Office Building Distribution, Retail Store Power Distribution, Healthcare Clinic Sub-Panel, Data Center Row Power Distribution, Light-Industrial Motor Control Center Feeder, K-12 School Classroom Building Distribution.
Light-Commercial Office Building Distribution
The NQ442L2C delivers 240 VAC three-phase power to lighting, receptacle, and HVAC loads across office floors in light-commercial buildings. Its 225 A copper bus at 42 pole spaces is the standard capacity for 5,000-15,000 sq ft office suites where each circuit feeds a 20 A receptacle run or a 1.5 kW class LED lighting string. Copper bus versus aluminum drops the bus temperature rise by roughly 30%, allowing the interior to live in a flush-mounted closet without active cooling even at 80% continuous load.
推荐
Retail Store Power Distribution
Retail outlets use the NQ442L2C to feed merchandising aisles, walk-in coolers, signage transformers, and HVAC rooftop units from a single 225 A service. The 240 VAC 3-phase bus lets the store run higher-efficiency 3-phase compressors on refrigeration while 120 VAC single-phase from the same panel feeds general lighting and point-of-sale receptacles. The Square D QOB bolt-on branch breakers used here survive constant plugging and unplugging common in tenant buildouts.
推荐
Healthcare Clinic Sub-Panel
Clinics and small medical offices depend on the NQ442L2C for reliable 240 VAC sub-distribution to exam rooms, imaging suites, and emergency lighting inverters. The 200% rated neutral handles harmonic content from modern diagnostic imaging loads (MRI gradient amps, X-ray rectifiers) without nuisance neutral overheating. cULus listing under both US and Canadian standards supports cross-border healthcare construction without re-specifying the panelboard.
推荐
Data Center Row Power Distribution
In distributed data center designs, the NQ442L2C serves as the row-level power distribution node that steps 480 VAC three-phase down to 240 VAC three-phase for IT rack busways. The 200% neutral is essential here: switch-mode power supplies draw third-harmonic currents that can load neutrals to 150% of phase currents. Copper bus keeps voltage drop under 3% even at full 225 A load, preserving CPU power-supply hold-up margin during transient peaks.
推荐
Light-Industrial Motor Control Center Feeder
The NQ442L2C feeds downstream motor control centers and VFD lineups in light-industrial facilities such as packaging plants and warehouses. 240 VAC 3-phase architecture pairs naturally with 240 V three-phase motors up to 15 hp (using inverse-time branch breakers) and reduces losses in feeder runs compared with 120 V single-phase. The convertible main-lug-to-main-breaker design lets the same interior act as service entrance or sub-feed depending on project topology.
推荐
K-12 School Classroom Building Distribution
Elementary, middle, and high school classroom buildings use the NQ442L2C to distribute power across wings that house classrooms, computer labs, and cafeteria kitchens. 42 pole spaces support the typical 25-35 branch circuits per classroom wing at 225 A service. cULus listing ensures code compliance in jurisdictions across both US and Canada, and tamper-resistant QO breakers available for the NQ family meet NEC 406.12 for child-occupied facilities.
推荐
推荐产品汇总
工程参考数据： NQ442L2C ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | NQ454L2C | NQ442L4C | NQ430L2C |
|---|---|---|---|---|
| Brand | Schneider Electric (Square D) | Schneider Electric (Square D) | Schneider Electric (Square D) | Schneider Electric (Square D) |
| Package | NQ Panelboard Interior (42-pole) | NQ Panelboard Interior (54-pole) | NQ Panelboard Interior (42-pole, 400 A) | NQ Panelboard Interior (30-pole) |
| Main Ampere Rating | 225 A | 225 A | 400 A | 225 A |
| Pole Spaces | 42 | 54 | 42 | 30 |
| Bus Material | Copper | Copper | Copper | Copper |
| Phases / Wires | 3 phase / 4 wire | 3 phase / 4 wire | 3 phase / 4 wire | 1 phase / 3 wire |
| Voltage Rating | 240 VAC / 48 VDC | 240 VAC / 48 VDC | 240 VAC / 48 VDC | 240 VAC / 48 VDC |
| Compatible Breakers | QO / QOB bolt-on | QO / QOB bolt-on | QO / QOB bolt-on | QO / QOB bolt-on |
| Neutral Rating | 200% rated | 200% rated | 200% rated | 200% rated |
关键差异点
- 42 pole spaces at 225 A provides balanced capacity for typical commercial loads （对比 NQ430L2C)
- Copper bus standard for lower voltage drop and cooler operation （对比 Aluminum-bus NQ variants)
- Convertible lug-to-breaker main without replacing the interior （对比 Fixed main-lug-only alternatives)
- 200% neutral rating handles harmonic currents from modern IT and LED loads （对比 100% neutral alternatives)
设计说明
Estimated: at full 225 A continuous load with 240 VAC 3-phase, the NQ442L2C copper-bus interior dissipates approximately 60 W under balanced unity-power-factor loads, with internal bus temperature rises around 30 C above ambient at 100% rated current. Verify enclosure ventilation and that the selected NQ enclosure is rated for the calculated heat load. Square D enclosures come in NEMA 1, 3R, and 12 variants - pair the interior with an enclosure that matches the installation environment.
Copper bus runs ~30% cooler than equivalent aluminum bus at the same current, but at continuous loads above 80% of 225 A (i.e. 180 A), derate per NEC Article 408. Consider upsizing to the NQ442L4C (400 A) for continuous-load applications like data-center row power where loads stay above 180 A for hours. Field-installed main breaker kits (QOM2 series) allow future conversion without replacing the interior.
The NQ442L2C is 'Convertible from main lug to main breaker' - this means the interior ships as main-lugs-only and a QOM2 main breaker kit must be field-installed for service-entrance applications. Forgetting this kit causes a service-entrance installation to fail inspection. Also note that tandem breakers only fit in slot positions designed for tandem mounting - consult the catalog 1640CT0801 panelboard layout diagram before populating circuits.
Plan branch-breaker layout with a dedicated 30-50 A 2-pole for HVAC, a 20-50 A 2-pole for water heater, and only 1-pole 20 A on the lighting/receptacle side. Group high-inrush loads (motors, HVAC compressors) near the main lugs to minimize conductor runs and reduce voltage drop. The interior mounting depth is approximately 6.5 inches; ensure the selected enclosure has adequate wire-bending space per NEC 312.6.
合规信息
cULus listed per Schneider Electric product page (standards US and Canada per Square D NQ catalog 1640CT0801). RoHS/REACH status not explicitly stated in the verified web data; RoHS compliance can be confirmed on the Schneider Electric material-declaration portal for this part number.
