MEAN WELL NSP-1600-12 is a single-output enclosed industrial AC/DC power supply rated 12 V, 125 A and 1500 W. It accepts 90-264 VAC or 250-400 VDC with active PFC and intelligent fan cooling in a 41 mm 1U body. CANBus, output-voltage programming, remote ON/OFF, remote sense and isolated alarm signals support system integration; observe the model-specific programming and derating limits.
Product Datasheet
Download MEAN WELL NSP-1600 Datasheet (PDF)
The NSP-1600 section is on PDF pages 1, 2, 3, 4, 5, 6, 7, 8. Refer to the complete mechanical drawings and notes when planning installation.
Model Code and Configuration
| NSP-1600 |
NSP single-output industrial enclosed AC/DC power-supply family; 1600 is the family designation, not the guaranteed wattage of every output model. |
| -12 |
12 V nominal DC output; the complete ordering model is NSP-1600-12. |
| Standard and requested configuration |
The extended 15-125% PV range and optional mounting brackets require separate confirmation/order. No additional suffix or requested feature is inferred from this unsuffixed SKU. |
Output Ratings
| Nominal output |
12 VDC; 125 A rated current; 1500 W rated power. |
| Operating current range |
0-125 A, subject to input-voltage, temperature and programmed-output limits. |
| Built-in voltage adjustment |
11.5-15 V using the built-in potentiometer; distinct from the external PV range. |
| Ripple and noise |
150 mVp-p maximum under the specified measurement conditions. |
| Accuracy / regulation |
Voltage tolerance ±1.0%; line regulation ±0.5%; load regulation ±0.5%. |
| Timing |
Setup 1500 ms and rise 60 ms at 230 VAC/full load. Typical hold-up: 16 ms at 230 VAC/70% load; 10 ms at 230 VAC/full load. |
Unless stated otherwise, specifications are measured at 230 VAC, rated load and 25°C ambient. Ripple/noise uses 20 MHz bandwidth and a 12-inch twisted pair terminated with 0.1 µF and 47 µF parallel capacitors. Voltage tolerance includes setup, line and load regulation.
External PV adjustment may cause ripple/noise to exceed the tabulated rating under some operating conditions.
Input and Efficiency
| Input range |
90-264 VAC, 47-63 Hz, or 250-400 VDC; low-line load limits apply. |
| Typical efficiency / power factor |
89% efficiency; power factor 0.97 at 230 VAC/full load. |
| Typical AC input current |
14 A at 115 VAC; 8 A at 230 VAC. |
| Starting and leakage current |
Typical cold-start inrush 35 A at 230 VAC; leakage <2 mA at 230 VAC. |
The block diagram includes active inrush-current limiting and active PFC. Its PFC and PWM switching-frequency labels are 90 kHz and 70 kHz, respectively.
The efficiency-versus-load curve is specifically for the 48 V model at 115/230 VAC; it is not a measured curve for every output variant.
Input and Temperature Derating
| 180-264 VAC |
1500 W / 125 A; static-characteristic values are at 60 Hz. |
| 115 VAC |
1200 W / 100 A (published table values). |
| 100 VAC |
1050 W / 87.5 A (published table values). |
| 90 VAC |
900 W / 75 A (published table values). |
The 60 Hz input curve shows 60% load at 90 VAC, 70% at 100 VAC, 80% at 115 VAC and 100% from 180 to 264 VAC. The printed low-line wattages and currents are retained independently; rounded table values should not be treated as extra output allowance.
In the horizontal mounting orientation, the ambient curve permits 100% load from -20 to +50°C, derating to 75% at +60°C and 50% at +70°C. Apply both input and temperature limits; do not claim full power throughout the entire input/temperature range.
For this fan-cooled unit above 2000 m, reduce the allowable ambient temperature by 5°C per additional 1000 m. These pages do not specify a maximum operating altitude.
Protection
| Short circuit / overload |
Overload threshold 105-115% of rated output power. Constant-current limiting; after output voltage falls, the unit shuts down output after 5 seconds. Re-power on to recover. |
| Overvoltage |
15.75-18.75 V; output shuts down and re-powering is required. |
| Overtemperature |
Output shuts down; automatic recovery after temperature falls. |
Environment and Cooling
| Operating environment |
-20 to +70°C with derating; 20-90% RH, non-condensing. |
| Storage environment |
-40 to +85°C; 10-95% RH, non-condensing. |
| Temperature coefficient / vibration |
±0.03%/°C from 0 to +50°C; vibration 10-500 Hz, 2 G, 10 min/cycle, 60 min each along X, Y and Z. |
| Typical fan noise |
At 25°C ambient: 38 dB at 10% load; 45 dB at 70% load. Test setup follows ISO-7779. |
A built-in DC fan provides forced-air cooling with speed controlled by internal PSU temperature. The diagram shows airflow from the terminal end toward the rear fan end. No fan-stop threshold or numerical external ventilation clearance is specified in these pages.
External Output-Voltage Programming
The standard PV range for NSP-1600-12 is 60-125% of nominal output voltage. A 15-125% range is available only by request; it is not assumed fitted to this model.
Apply the external DC control voltage between CN1 pin 12 (PV) and pin 14 (-Vo(Signal)); this reference is non-isolated from the main output. Use the required remote- or local-sense connections below.
The page 4 curve shows these external-voltage anchors: 1 V → 60%, 2 V → 78%, 3 V → 95%, 4.7 V → 125%. The diagram labels the PV relationship non-linear and includes a 0.4 V transition; use the plotted anchors rather than extrapolating one linear conversion.
Adjust the permissible current with programmed voltage: the graph permits 100% rated current up to 100% nominal voltage, falling to 80% rated current at 125% voltage. Observe all other power, input and temperature limits.
Constant-current limiting is documented as protection. These NSP-1600 pages do not specify a separate external PC input, an active parallel current-share connection or a permissible parallel-unit count; do not infer these from another power-supply family.
Remote Control and Sense Connections
For ON, short CN1 pin 3 (+5V-aux) to pin 4 (R.C); for OFF, open that connection. Pin 4 is rated 4.5-5.5 V for ON and -0.5 to +0.5 V for OFF, maximum input 5.5 V. Pin 3 is for this control function only. The isolated control reference is GND-aux, not the main negative output.
External switch, optocoupler and relay examples are provided on page 4; those user control devices and their power sources are not listed as supplied accessories. Multiple-unit ON/OFF control is not evidence of output current sharing.
Remote sense compensates load-wire drop up to 0.5 VDC: connect pin 15 (+RS) to load positive and pin 16 (-RS) to load negative. Twist the sense wires together to reduce noise pickup.
When remote sense is unused, local-sense links are required: pin 15 (+RS) to pin 13 (+Vo(Signal)), and pin 16 (-RS) to pin 14 (-Vo(Signal)). Use the main copper bars for load current; the signal and sense pins cannot power the load.
A CN1 mating-wire assembly is listed as a standard accessory. Before operation, verify the ON/local-sense connections against pages 4-7 rather than assuming arbitrary jumper pairs from a different model.
CN1 Control Pin Assignment
| 1 / +12V-aux |
10.6-13.2 VDC auxiliary output, maximum 0.8 A, referenced to GND-aux pin 2. Built-in ORing diodes; unaffected by remote ON/OFF. |
| 2 / GND-aux |
Auxiliary and isolated control/alarm return; isolated from the main +Vo and -Vo output terminals. |
| 3 / +5V-aux |
For remote ON/OFF use only; not a general-purpose auxiliary load supply. |
| 4 / R.C |
Remote ON/OFF input. Short to +5V-aux pin 3 for ON (4.5-5.5 V); open for OFF (-0.5 to +0.5 V). Maximum input 5.5 V; isolated reference is GND-aux. |
| 5 / DC-OK |
Isolated output-status signal referenced to GND-aux pin 2; see the alarm levels and thresholds below. |
| 6 / T-ALARM |
Isolated temperature/fan-failure alarm output referenced to GND-aux pin 2; see the alarm levels below. |
| 7, 8, 9 / A0, A1, A2 |
CANBus address lines; non-isolated, referenced to -Vo(Signal). Address settings require the manufacturer User Manual. |
| 10, 11 / NC |
Reserved for future use; no user function is specified. |
| 12 / PV |
External output-voltage programming input; non-isolated, referenced to -Vo(Signal) pin 14. |
| 13 / +Vo(Signal) |
Positive local-sense signal; cannot be connected directly to the load. |
| 14 / -Vo(Signal) |
Negative local-sense and function-reference signal; cannot be connected directly to the load. |
| 15 / +RS |
Positive remote-sense input; connect to load positive, or to pin 13 for local sense. |
| 16 / -RS |
Negative remote-sense input; connect to load negative, or to pin 14 for local sense. |
CN1 has 16 positions. The onboard header is HRS DF11-16DP-2DS or equivalent; the mating housing is HRS DF11-16DS or equivalent. Contacts are printed as HRS DF11-**SC or equivalent; ** is an unspecified variant, not a complete orderable contact code.
Use the connector orientation in the mechanical drawing. A0/A1/A2 and PV are non-isolated references to -Vo(Signal); remote-control and alarm signals are isolated references to GND-aux.
Alarms, LED and Auxiliary Output
| DC-OK pin 5 |
High 3.5-5.5 V when Vout ≤77% ±5%; low -0.5 to +0.5 V when Vout ≥80% ±5%. Reference: GND-aux pin 2. |
| T-ALARM pin 6 |
High 3.5-5.5 V for overtemperature or fan failure (output OFF); low -0.5 to +0.5 V for normal internal temperature and fan operation (output ON). Reference: pin 2. |
| LED indication |
Green: normal. Constant red: OTP, OLP or fan failure. Flashing red: internal temperature reaches 60°C; the unit still operates normally without entering OTP and sends a CANBus alarm. |
Alarm outputs are isolated TTL signals with a 10 mA maximum signal-current figure. The function text calls this a sink limit, whereas the pin table calls it a sourcing limit; confirm the required sink/source interface before connecting a direction-dependent load.
The flashing-red 60°C figure is an internal temperature warning, not the ambient full-load limit or a specified fan-start temperature.
The auxiliary supply is 12 V nominal (10.6-13.2 VDC), maximum 0.8 A, between CN1 pins 1 and 2. It contains ORing diodes and is not controlled by remote ON/OFF; do not extend this ORing statement to the main output.
CANBus and CN2 Interface
| 1, 2, 3, 4 / NC |
Reserved for future use in the standard model. |
| 5, 6 / -Vo(Signal) |
Negative local-sense/function-reference signal; cannot be connected directly to the load. |
| 7 / CANH, 8 / CANL |
CANBus data lines; isolated and referenced to GND-aux. The pin table labels these as the CANBus-model interface. |
The family lists a built-in CANBus interface for control, settings, information reading, status monitoring and output trimming. Page 5 states CAN 2.0B with a maximum bus-speed figure printed as 250 kHz. Confirm the communication timing, address settings and commands in the manufacturer User Manual; this catalog does not provide those details.
CN2 has 8 positions: onboard HRS DF11-8DP-2DS or equivalent, mating HRS DF11-8DS or equivalent, contacts HRS DF11-**SC or equivalent. The exact contact variant and a supplied CN2 cable quantity are not specified. Do not interchange CN1 and CN2 housings or invent a CAN ordering suffix.
Mechanical Installation and Power Terminals
| Body / drawing |
300 × 85 × 41 mm (L × W × H), 1U; case 296A; drawing tolerance ±0.5 mm. |
| Mounting holes |
Bottom: 3-M3, maximum penetration 4 mm, recommended torque 6-8 kgf·cm. Each side: 2-M4, maximum penetration 5 mm, recommended torque 7-10 kgf·cm. |
| AC input terminals |
1: FG protective earth; 2: AC/N; 3: AC/L. M3.5 terminal screws; maximum torque 8 kgf·cm. |
| Output copper bars |
Use +Vo and -Vo main-output bars. Drawing projections are 38 mm (+Vo) and 28 mm (-Vo), with Ø6.5 connection holes; allow these in installation space. |
| Reference hole spacing |
Side M4 spacing 252 mm; bottom longitudinal spacing 264.7 mm. Use the full page 6 drawing for all offsets and hole positions. |
Mounting penetration is the depth into the chassis, not overall screw length; allow for mounting-material thickness. The AC terminal projection is marked 12 mm maximum. No DC terminal tightening torque or DC load-wire gauge is specified here; do not borrow another series value.
The page 8 bracket installation uses M4 × 4 combination screws at the four bracket positions. Use the stated mounting-hole limits and the complete drawing; the drawing does not establish that a loose screw kit is included.
Included and Optional Accessories
| Included CN1 mating wire |
1 assembly per power supply, listed as a standard accessory; HRS DF11-16DS or equivalent, UL1007 26AWG wire, 15 mm loop dimension shown. The 26AWG value is for this control harness, not the main load cable. |
| Optional mounting brackets |
MEAN WELL order code PGG2MHS013A; 4 brackets per model installation, by request and ordered separately. |
| Other connection parts |
CN1/CN2 housing compatibility is listed above. The abbreviated DF11-**SC contacts need exact variant confirmation; no complete contact-kit or additional cable order code is established here. |
Safety, EMC and Reliability
| Safety approvals listed |
UL62368-1; CAN/CSA C22.2 No.62368-1; TUV BS EN/EN62368-1; BSMI CNS15598-1; AS/NZS62368.1; EAC TP TC004; BIS IS13252(Part1):2010 / IEC60950-1:2005 |
| Withstand / insulation |
Input-output 3 kVAC; input-FG 2 kVAC; output-FG 1.5 kVAC. Insulation resistance 100 MΩ at 500 VDC, 25°C, 70% RH for all three paths. |
| Emission limits |
Conducted: Class B under BS EN/EN55032 (CISPR32), Class A under CNS15936. Radiated: Class A under both. Harmonics: BS EN/EN61000-3-2 Class A; flicker: BS EN/EN61000-3-3. |
| Immunity standards |
BS EN/EN55024; BS EN/EN61000-6-2; BSMI CNS15598-1. |
| Minimum MTBF |
684.7K hours, Telcordia SR-332 (Bellcore); 69.2K hours, MIL-HDBK-217F at 25°C. |
The datasheet says the design refers to SEMI F47 at 200 VAC; this is not an unconditional certification of the completed equipment.
Immunity tests: ESD: BS EN/EN61000-4-2; level 3, 8 kV air; level 2, 4 kV contact; Radiated RF: BS EN/EN61000-4-3; level 3; EFT / burst: BS EN/EN61000-4-4; level 3; Surge: BS EN/EN61000-4-5; level 4, 2 kV line-line and 4 kV line-earth; Conducted RF: BS EN/EN61000-4-6; level 3; Magnetic field: BS EN/EN61000-4-8; level 4; Voltage dips / interruptions: BS EN/EN61000-4-11; >95% dip for 0.5 periods, 30% dip for 25 periods; >95% interruptions for 250 periods.
The supply is a component. Published EMC tests use a 720 × 360 mm metal plate, 1 mm thick; final equipment must be checked again for EMC compliance.
MTBF figures are reliability-model references, not guaranteed service life. The manufacturer datasheet lists a 5-year warranty, subject to applicable manufacturer terms.
Weight and Datasheet Scope
| Per-unit catalog weight reference |
1800 g (1.8 kg), taken from the per-unit PACKING entry. |
| Published packing |
6 pieces / 11.3 kg / 1.25 CUFT; carton total is not the individual product weight. |
| Specification reference |
NSP-1600-SPEC, 2025-08-19; PDF pages 1-8. |
The catalog weight reference is not a measured net weight or a customer shipment weight. The family lists industrial automation, testing, laser-related equipment, burn-in, digital broadcasting and constant-current-source applications; apply the documented operating and protection limits for the selected use.
