Inosaki – Your Trusted Phoenix Contact Distributor
Inosaki proudly stands as one of the largest distributors of Phoenix Contact products, offering a comprehensive range of terminal blocks, interface modules, power supplies, and relays.

Our Best-Selling Terminal Blocks: Feed-Through, Fuse Modular, Spring Cage, Double Level, Multi-Level

Series Models: PT Series, ST Series, TB Series, UT Series, and UK Series, PTV Series, UKH Series, Micro Series.

Reliable Power Supply Solutions

Discover industry-leading Phoenix Contact power supplies, such as:

QUINT Power – Premium performance for critical systems
STEP Power – Compact design for space-saving applications
Trio Power – Rugged and reliable for industrial needs
UNO Power – Cost-effective and efficient

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Need detailed product information? Contact us at sales@inosaki.com to request your Phoenix Contact catalog.

Product Description

STEP POWER power supplies – for building technology
Due to their design, the flat power supplies are particularly suitable for distribution boards and flat control panels. The power supply units are available with 24 V DC output voltage in various performance classes and overall widths as well as special voltages 5, 12, 15, and 48 V DC. Their high degree of efficiency and low standby losses ensure a high level of energy efficiency.

Dimensions

Width	90 mm
Height	90 mm
Depth	61 mm
Installation distance right/left	0 mm / 0 mm
Installation distance top/bottom	30 mm / 30 mm

Ambient conditions

Degree of protection	IP20
Ambient temperature (operation)	-25 °C … 70 °C (> 55° C derating : 2.5%/K)
Ambient temperature (storage/transport)	-40 °C … 85 °C
Max. permissible relative humidity (operation)	≤ 95 % (at 25 °C, non-condensing)
Climatic class	3K3 (in acc. with EN 60721)
Degree of pollution	2

Input data

Nominal input voltage range	100 V AC … 277 V AC
Input voltage range	85 V AC … 305 V AC
	95 V DC … 250 V DC
AC frequency range	45 Hz … 65 Hz
Frequency range DC	0 Hz
Current consumption	1.43 A (120 V AC)
	0.75 A (277 V AC)
Nominal power consumption	147.7 VA
Inrush current	< 40 A (typical)
Mains buffering time	typ. 25 ms (120 V AC)
	typ. 160 ms (277 V AC)
Input fuse	4 A (slow-blow, internal)
Recommended breaker for input protection	6 A … 16 A (Characteristics B, C, D, K)
Power factor (cos phi)	0.64

Output data

Nominal output voltage	24 V DC ±1 %
Setting range of the output voltage (U_Set)	22.5 V DC … 25 V DC (> 24 V DC, constant capacity restricted)
Nominal output current (I_N)	3.5 A (-25 °C … 55 °C)
Output current I_max	6 A
Derating	55 °C … 70 °C (2.5%/K)
Connection in series	yes
Feedback voltage resistance	≤ 35 V DC
Protection against overvoltage at the output (OVP)	< 35 V DC
Control deviation	< 1 % (change in load, static 10 % … 90 %)
	< 2 % (change in load, dynamic 10 % … 90 %)
	< 0.1 % (change in input voltage ±10 %)
Residual ripple	< 10 mV_PP (20 MHz)
Output power	84 W
Typical response time	< 0.5 s
Peak switching voltages nominal load	< 30 mV_PP (20 MHz)
Maximum power dissipation in no-load condition	< 0.6 W
Power loss nominal load max.	11.5 W

General

Article Number	2904945
Net weight	0.3 kg
Operating voltage display	Green LED
Efficiency	> 88 % (for 277 V AC and nominal values)
MTBF (IEC 61709, SN 29500)	> 1094000 h (40 °C)
Insulation voltage input/output	4 kV AC (type test)
	3.75 kV AC (routine test)
Degree of protection	IP20
Protection class	II
Housing material	Polycarbonate
Foot latch material	POM (Polyoxymethylene)
Mounting position	horizontal DIN rail NS 35, EN 60715
Assembly instructions	alignable: 0 mm horizontally, 30 mm vertically

Connection data, input

Connection method	Screw connection
Conductor cross section solid min.	0.2 mm²
Conductor cross section solid max.	2.5 mm²
Conductor cross section flexible min.	0.2 mm²
Conductor cross section flexible max.	2.5 mm²
Conductor cross section AWG min.	24
Conductor cross section AWG max.	12
Stripping length	6.5 mm
Screw thread	M3

Connection data, output

Connection method	Screw connection
Conductor cross section solid min.	0.2 mm²
Conductor cross section solid max.	2.5 mm²
Conductor cross section flexible min.	0.2 mm²
Conductor cross section flexible max.	2.5 mm²
Conductor cross section AWG min.	24
Conductor cross section AWG max.	12
Stripping length	6.5 mm
Screw thread	M3

Standards

EMC requirements for noise immunity	EN 61000-6-1
	EN 61000-6-2
EMC requirements for noise emission	EN 61000-6-3
	EN 61000-6-4
Standard – Safety of transformers	EN 61558-2-16
Standard – Electrical safety	IEC 62368-1 (SELV)
Standard – Electronic equipment for use in electrical power installations and their assembly into electrical power installations	EN 50178/VDE 0160 (PELV)
Standard – Safety extra-low voltage	IEC 62368-1 (SELV) und EN 60204-1 (PELV)
Standard – Safe isolation	DIN VDE 0100-410
Standard – Protection against shock currents, basic requirements for protective separation in electrical equipment	EN 50178
Standard – Limitation of mains harmonic currents	EN 61000-3-2
Rail applications	EN 50121-4

Conformance/approvals

UL approvals	UL/C-UL listed UL 508
	UL/C-UL Recognized UL 60950-1
	NEC Class 2 as per UL 1310

EMC data

Electromagnetic compatibility	Conformance with EMC Directive 2014/30/EU
Low Voltage Directive	Conformance with Low Voltage Directive 2014/35/EC
Electrostatic discharge	EN 61000-4-2
Contact discharge	6 kV (Test Level 3)
Discharge in air	8 kV (Test Level 3)
Electromagnetic HF field	EN 61000-4-3
Frequency range	80 MHz … 1 GHz
Test field strength	10 V/m
Frequency range	1 GHz … 2 GHz
Test field strength	10 V/m
Frequency range	2 GHz … 3 GHz
Test field strength	10 V/m
Comments	Criterion A
Fast transients (burst)	EN 61000-4-4
Input	4 kV (Test Level 4 – asymmetrical)
Output	2 kV (Test Level 3 – asymmetrical)
Comments	Criterion B
Surge voltage load (surge)	EN 61000-4-5
Input	2 kV (Test Level 3 – symmetrical)
	4 kV (Test Level 4 – asymmetrical)
Output	1 kV (Test Level 2 – symmetrical)
	0.5 kV (Test Level 1 – asymmetrical)
Comments	Criterion B
Conducted interference	EN 61000-4-6
Frequency range	10 kHz … 15 kHz
	0.15 MHz … 80 MHz
Voltage	3 V (Test Level 2)
	10 V (Test Level 3)
Comments	Criterion A
	Criterion A
Voltage dips	EN 61000-4-11

Environmental Product Compliance

REACh SVHC	Lead 7439-92-1
China RoHS	Environmentally Friendly Use Period = 25;
	For details about hazardous substances go to tab “Downloads”, Category “Manufacturer’s declaration”