Cincon LFM420S Series AC/DC Power Supply
The Cincon LFM420S Series is a high-performance 420W AC-DC power supply featuring active PFC and a universal 85–264Vac input range. Designed for industrial and ITE applications, this low-profile (25.4mm height) Class I power supply delivers high efficiency up to 94.5% with robust protection features and compliance to IEC/EN/UL 62368-1 Ed. 3.0. A...
Read MoreThe Cincon LFM420S Series is a high-performance 420W AC-DC power supply featuring active PFC and a universal 85–264Vac input range. Designed for industrial and ITE applications, this low-profile (25.4mm height) Class I power supply delivers high efficiency up to 94.5% with robust protection features and compliance to IEC/EN/UL 62368-1 Ed. 3.0.
Available in baseplate or enclosed cover versions, the LFM420S supports forced air cooling or conduction cooling with an external baseplate, providing flexible thermal management options. Built-in protections include over-voltage, constant current over-current protection, short circuit protection, and over-temperature protection.
With single output voltage options from 12V to 54V and output currents up to 35A, the LFM420S Series is ideal for demanding industrial and electronic equipment applications requiring reliable 420W power delivery.
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Features
- Input Voltage Range: 85–264Vac (Operating range: 100–240Vac)
- Output Voltage Options: 12V, 15V, 24V, 28V, 30V, 36V, 48V, 54V
- Maximum Output Current: Up to 35A (model dependent)
- Active Power Factor Correction (PFC): 0.98 @115Vac full load, 0.95 typ. at 230Vac full load
- Under-voltage protection: 65–75Vac
- Load regulation: ±1.0%
- Over Voltage Protection (latch off, auto reset after AC recycle)
- Operating temperature: -40°C to +80°C
- Over Voltage Category OVC II & OVC III
Specifications
| ABSOLUTE MAXIMUM RATINGS | ||||||
|---|---|---|---|---|---|---|
| Parameter | Notes and Conditions |
Device |
Min. |
Typ. |
Max. |
Units |
| Input Voltage | Safety approvals only to the AC input No safety approvals |
All | 85 120 |
264 370 |
Vac Vdc |
|
| Operating Temperature | See derating curve | All | -40 | 80 | ℃ | |
| Operating Case Temperature | At the center of base plate (T꜀ = Case temperature) |
All | -40 | 85 | ℃ | |
| Storage Temperature | All | -40 | 85 | ℃ | ||
| Operating Altitude | IEC/EN/UL 62368-1 OVC II IEC/EN/UL 62368-1 OVC III |
All | 5000 2000 |
m | ||
| INPUT CHARACTERISTICS | ||||||
|---|---|---|---|---|---|---|
| Parameter | Notes and Conditions |
Device | Min. |
Typ. |
Max. |
Units |
| Operating Input Voltage | All | 100 | 240 | Vac | ||
| Input Frequency Range | All | 47 | 63 | Hz | ||
| No safety approvals. Some specifications are not meet, such as Leakage Current and No Load Input Power Consumption | 400 | |||||
| Maximum Input Current | 100% Load, Vᵢₙ=100Vac | All | 6 | A | ||
| Leakage Current | @47-63Hz | All | 0.3 | mA | ||
| Inrush Current | Vᵢₙ=240Vac, Cold Start @25℃ | All | 30 | A | ||
| Under Voltage Protection | All | 65 | 75 | Vac | ||
| Power Factor | 115Vac @ Full load, 47-63Hz | All | 0.98 | |||
| 230Vac @ Full load, 47-63Hz | 0.95 | |||||
| 115Vac @ Full load, 400Hz Input Frequency 400HZ No safety approvals |
0.93 | |||||
| OUTPUT CHARACTERISTICS | ||||||
|---|---|---|---|---|---|---|
| Parameter | Notes and Conditions |
Device |
Min. |
Typ. | Max. |
Units |
| Output Voltage Set Point |
Vᵢₙ=Nominal Vᵢₙ, Iₒ= Iₒ_ₘₐₓ., T꜀=25℃ |
LFM420S120 |
11.88 14.85 23.76 27.72 29.70 35.64 47.52 53.46 |
12 15 24 28 30 36 48 54 |
12.12 |
Vdc |
| Operating Output Current Range | Vᵢₙ=85Vac-264Vac, see derating curve | LFM420S120 LFM420S150 LFM420S240 LFM420S280 LFM420S300 LFM420S360 LFM420S480 LFM420S540 |
|
35.00A 28.00A 17.50A 15.00A 14.00A 11.67A 8.75A 7.78A |
A | |
| Holdup Time |
Vᵢₙ=115Vac load:350W Vᵢₙ=115Vac Load:420W |
All |
12 8 |
ms | ||
| Output Voltage Regulation | ||||||
| Load Regulation | 10% Load to full load | All | ±1.0 | % | ||
| Line Regulation | Vᵢₙ=High line to low line | All | ±0.5 | % | ||
| Output Voltage Adjustment | Pₒ≦ₘₐₓ. rated power, Iₒ ≦ Iₒ_ₘₐₓ. Pₒ≦ₘₐₓ. rated power, Iₒ ≦ Iₒ_ₘₐₓ. Pₒ≦ₘₐₓ. rated power, Iₒ ≦ Iₒ_ₘₐₓ. |
LFM420S280 LFM420S540 Others |
0 -5 -5 |
+5 +2 +5 |
% | |
| Over Voltage Protection | Latch off (reset after about one minute after the input is turned off) | LFM420S120 LFM420S150 LFM420S240 LFM420S280 LFM420S300 LFM420S360 LFM420S480 LFM420S540 |
16 20 30 35 35 50 63 63 |
Vdc | ||
| Over Current Protection | Constant current, auto recovery (see application note) |
All | 110 | 180 | % | |
| Short Circuit Protection | Auto recovery | All | ||||
| Over Temperature Protection | Auto recovery If conduction convection with external baseplate is used or the recommended temperature curve is exceeded, the Tc temperature must be maintained <85℃ |
All | ||||
| Output Ripple and Noise | 1. Add a 0.1uF ceramic capacitor and a 10uF aluminum electrolytic capacitor to output 2. Oscilloscope is 20MHz band width. 3. Ambient Temperature=25℃ |
LFM420S120 LFM420S150 LFM420S240 LFM420S280 LFM420S300 LFM420S360 LFM420S480 LFM420S540 |
120 150 240 280 300 360 480 540 |
mV | ||
| Load Capacitance | 1. Vᵢₙ=115Vac and 230Vac 2. Output is max. load 3. Ambient temperature=25℃ |
LFM420S120 LFM420S150 LFM420S240 LFM420S280 LFM420S300 LFM420S360 LFM420S480 LFM420S540 |
29100 23300 14500 12500 11600 9700 7200 6400 |
uF | ||
| Efficiency | 1. Input Voltage is 230Vac 2. Output is rated load 3. Ambient temperature=25℃ |
LFM420S120 LFM420S150 LFM420S240 LFM420S280 LFM420S300 LFM420S360 LFM420S480 LFM420S540 |
92.5 93.0 94.0 94.0 94.0 94.0 94.0 94.5 |
% | ||
| ISOLATION CHARACTERISTICS | ||||||
|---|---|---|---|---|---|---|
| Parameter | Notes and Conditions |
Device |
Min. |
Typ. |
Max. |
Units |
| Input to Output | 1 Minute (without dielectric breakdown) | All | 4250 | Vac | ||
| Input to Earth (Ground) | 1 Minute (without dielectric breakdown) | All | 2000 | Vac | ||
| Output to Earth (Ground) | 1 Minute (without dielectric breakdown) |
All |
2000 | Vac | ||
| Isolation Resistance | Input to output | All | 100 | MΩ | ||
| FEATURE CHARACTERISTICS | ||||||
|---|---|---|---|---|---|---|
| Parameter | Notes and Conditions |
Device |
Min. |
Typ. |
Max. |
Units |
| Switching Frequency | Pₒᵤₜ=max. rated power |
All |
65 | kHz | ||
| GENERAL CHARACTERISTICS | ||||||
|---|---|---|---|---|---|---|
| Parameter | Notes and Conditions |
Device |
Min. |
Typ. |
Max. |
Units |
| MTBF | Iₒ=100%; Ta=25℃ per MIL-HDBK-217F Iₒ=100%; Ta=25℃ per Telcordia SR332 |
All |
1600 |
400 | k hours | |
| Life Time (Detail refer to Application Note) | Conduction cooling @75% Load, 40℃ Fan cooling @75% Load, 40℃ |
All | 119 288 |
k hours | ||
| Humidity | Non-condensing | All | 93 | % RH | ||
| Shock | Meet MIL-STD-810F Table 516.5,Table 516.5-I 10ms, each axis 3 times(±X ±Y ±Z axis) | All | 75 | g | ||
| Vibration | Meet MIL-STD-810F Table 514.5C-VIII,15~2000Hz, X Y Z axis, 1 hour (each axis),. Total 3 hrs. | All | 4 | g | ||
| Weight | Baseplate versions Covered versions |
All | 350 470 |
grams | ||
| Dimensions |
Baseplate versions
|
All | 5.00x3.00x1.00 Inches (127x76.2x25.40mm) 5.09x3.29x1.00 Inches (129.4x83.5x25.4mm) |
|||
| Safety | Class I, IEC/EN/UL 62368-1 | Ed. 3.0 | ||||
| EMC Emission | EN 55032 (Class B), EN 61000-6-3, EN 61000-6-4, EN 61204-3, EN 61000-3-2, EN 61000-3-3, 47 CFR FCC Part 15 Subpart B |
Class B | ||||
| Conducted Disturbance | EN 55032, 47 CFR FCC Part 15 Subpart B (Class B) | Class B | ||||
| Radiated Disturbance | EN 55032, 47 CFR FCC Part 15 Subpart B (Class B) | Class B | ||||
| Harmonic Current Emissions | EN 61000-3-2 | Class A, C, D | ||||
| Voltage Fluctuations & Flicker | EN 61000-3-3 | |||||
| EMC Immunity | EN 55035, EN 61000-6-1, EN 61000-6-2, EN 61204-3 | |||||
| Electrostatic Discharge (ESD) | IEC 61000-4-2, Level 3: Air Discharge: ±8kV, Contact Discharge: ±4kV | Criterion A | ||||
| Radio-Frequency, Continuous Radiated Disturbance |
IEC 61000-4-3, Level 3: 80~1000MHz, 10V/m | Criterion A | ||||
| Electrical Fast Transient (EFT) | IEC 61000-4-4, Level 3: ±2kV | Criterion A | ||||
| Surge | IEC 61000-4-5, Level 4: L-N: ±2kV, L-E (Ground): ±4kV | Criterion A | ||||
| Conducted Disturbances, Induced by RF Fields | IEC 61000-4-6, Level 3: 0.15-80MHz, 10V | Criterion A | ||||
| Power Frequency Magnetic Field | IEC 61000-4-8, Level 4: 50-60Hz, 30A/m | Criterion A | ||||
| Voltage Dips | IEC/EN 61000-4-11, Dip: 30% Reduction IEC/EN 61000-4-11, Dip >95% Reduction |
Criterion A | ||||
| Voltage Interruptions | IEC/EN 61000-4-11, >95% Reduction | Criterion B | ||||
| Application Note Link | LFM420S Series App Notes | |||||
Selection Table
| MODEL NUMBER | OUTPUT VOLTAGE | OUTPUT CURRENT | RIPPLE & NOISE NOTE1 | VOLTAGE ACCURACY NOTE2 | VOLTAGE ADJ. RANGE | LINE REGULATION NOTE3 | LOAD REGULATION NOTE4 | % EFF. (Typ.) NOTE5 | ||
|---|---|---|---|---|---|---|---|---|---|---|
| With Fan NOTE6 | With Conduction Cooling NOTE7 | |||||||||
| Baseplate | Cover | |||||||||
| LFM420S120 |
12 Vdc |
35 A | 26.25 A | 29.17 A | 120 mV | ±1% | 11.4-12.6 V | ±0.5% | ±1% | 92.5% |
|
LFM420S150 |
15 Vdc |
28 A | 21 A | 23.33 A | 150 mV | ±1% | 14.25-15.75 V | ±0.5% | ±1% | 93% |
| LFM420S240 |
24 Vdc |
17.5 A | 13.13 A | 14.58 A | 240 mV | ±1% | 22.8-25.2 V | ±0.5% | ±1% | 94% |
| LFM420S280 |
28 Vdc |
15 A | 11.25 A | 12.50 A | 280 mV | ±1% | 28-29.4 V | ±0.5% | ±1% | 94% |
| LFM420S300 |
30 Vdc |
14 A | 10.50 A | 11.67 A | 300 mV | ±1% |
28.5-31.5 V |
±0.5% | ±1% | 94% |
| LFM420S360 |
36 Vdc |
11.67 A | 8.75 A | 9.72 A | 360 mV | ±1% |
34.2-37.8 V |
±0.5% | ±1% | 94% |
| LFM420S480 |
48 Vdc |
8.75 A | 6.56 A | 7.29 A | 480 mV | ±1% | 45.6-50.4 V | ±0.5% | ±1% | 94% |
| LFM420S540 |
54 Vdc |
7.78 A | 5.83 A | 6.48 A | 540 mV | ±1% | 51.3-55.0 V | ±0.5% | ±1% | 94.5% |
|
NOTE: |
||||||||||
PART NUMBER
| SERIES | NUMBER OF OUTPUTS | NOMINAL OUTPUT VOLTAGE | TYPE | MOUNTING INSERTS |
|---|---|---|---|---|
| LFM420 | O | XXX | X | -YZ |
| LFM420 |
S：Single |
120 : 12Vdc |
B：With Baseplate C：With Cover |
Blank：Through Hole C0：Threaded Hole |
|
Part Number Example: |
||||
Technical Drawings
Warranty & Returns
Warranty periods vary by product. Please refer to the Powerbox Warranty Policy for the applicable coverage period against manufacturing defects from date of purchase. For returns and RMA requests, please visit our RMA support page or contact our support team directly.
Related Products
- Universal Input: 85–264Vac (Operating: 100–240Vac), 47–63Hz
- Eight Output Voltage Models: 12V, 15V, 24V, 28V, 30V, 36V, 48V, 54V
- High Output Current Capability: Delivers up to 16.67A depending on the output voltage model, supporting demanding medical and industrial loads.
- Input Voltage Range: 85–264Vac (Operating range: 100–240Vac)
- Output Voltage Options: 12V, 15V, 24V, 28V, 30V, 36V, 48V, 54V
- Maximum Output Current: Up to 16.67A (model dependent)
- Wide Universal AC Input Range: 85–264Vac input supporting global AC mains operation across medical and industrial environments.
- Multiple Output Voltage Options: Available in 12V, 15V, 24V, 28V, 30V, 48V and 54V single output models to support a wide range of system requirements.
- High Output Current Capability: Delivers up to 25A depending on the selected output voltage model, enabling reliable power delivery for demanding applications.
- Input Voltage Range: 85–264Vac (Operating range: 100–240Vac)
- Output Voltage Options: 12V, 15V, 24V, 28V, 30V, 48V, 54V
- Maximum Output Current: Up to 25A (model dependent)
- Wide Universal AC Input Range: 85–264Vac input allowing reliable operation across global AC power systems.
- Multiple Output Voltage Options: Available in 12V, 15V, 24V, 28V, 30V, 36V, 48V and 54V output models for flexible system integration.
- High Output Current Capability: Provides up to 35A output current depending on model, supporting higher power medical and industrial equipment.
- Wide Universal AC Input Range: 85–264Vac input enabling global operation across a wide range of AC power systems.
- Multiple Output Voltage Options: Available in 12V, 15V, 24V, 28V, 30V, 36V, 48V and 54V single output models for flexible system design.
- High Output Current Capability: Provides up to 45.83A output current depending on model, supporting high-power medical equipment.
- Input Voltage Range: 85–264Vac (Operating range: 100–240Vac)
- Output Voltage Options: 12V, 15V, 24V, 28V, 30V, 36V, 48V, 54V
- Maximum Output Current: Up to 45.83A (model dependent)