Image shown is a representation only. Exact specifications should be obtained from the product datasheet.

Mean Well GST25A18-P1J Power Supply 25W 18V 1.38A

Name: Mean Well GST25A18-P1J Power Supply 25W 18V 1.38A
Brand: Mean Well
SKU: GST25A18-P1J
Price: 18.38 USD
Availability: InStock

SKU GST25A18-P1J

$18.38 USD

Shipping calculated at checkout.

Select model — 6 in this family

GST25A18-P1J

GST18B18-P1J 2 Pole Low stock$17.97 USD

GST18A18-P1J 3 Pole Backorder$17.97 USD

GST25B18-P1J 2 Pole Low stock$18.38 USD

GST25A18-P1J 3 Pole Low stock$18.38 USD

GST40A18-P1J 3 Pole Low stock$20.01 USD

GST60A18-P1J 3 Pole In stock$22.03 USD

Product variants

In stock

Overview

GST25A18-P1J is the 18V output model of this series: rated current 1.38A, typical efficiency 87%.

GST25A is a highly reliable, 25W desktop style single-output green adaptor series. This product is a classⅠ power unit (with FG), equipped with a standard IEC320-C14 AC inlet and adopting the input range from 85VAC to 264VAC. The entire series supplies different models with output voltages ranging between 5VDC and 48VDC that can satisfy the demands for various types of consumer electronic devices. With the efficiency up to 89% and the extremely low no-load power consumption below 0.075W, GST25A is compliant with USA EISA 2007/DoE, Canada NRCan, Australia and New Zealand MEPS, Korea K-MEPS, EU ErP,and Code of Conduct(CoC) Version 5. The supreme feature allows the adaptor to save the energy when it is either under the operating mode or the standby mode. The entire series utilizes the 94V-0 flame retardant plastic case.GST25A is certified for the international safety regulations.

Features

Global certificates
Universal AC input / Full range
3 pole AC inlet IEC320-C14,ClassⅠpower unit
No load power consumption< 0.075W
Energy efficiency Level Ⅵ
Comply with EISA 2007/DoE,NRCan,Korea K-MEPS, AU/NZ MEPS,EU ErP and CoC Version 5
Protections: Short circuit / Overload / Over voltage
Fully enclosed plastic case
Pass LPS
-30~+70℃ wide range working temperature
LED indicator for power on
Various DC plug quick adaptor accessory available (Plug kit sold sperately, please refer to : https://www.meanwell.com/upload/pdf/DC_plug.pdf)
3 years warranty

Specifications

GST25A18-P1JSpecifications from the official datasheet (2026-04-03 edition)

OUTPUT

SAFETY MODEL NO.: GST25A18
DC VOLTAGE^Note.2: 18V
RATED CURRENT: 1.38A
CURRENT RANGE: 0 ~ 1.38A
RATED POWER (max.): 25W
RIPPLE & NOISE (max.)^Note.3: 100mVp-p
VOLTAGE TOLERANCE^Note.4: ±3.0%
LINE REGULATION^Note.5: ±1.0%
LOAD REGULATION^Note.6: ±3.0%
SETUP, RISE, HOLD UP TIME: 1000ms, 30ms, 50ms/230VAC 1500ms, 30ms, 15ms/115VAC at full load

INPUT

VOLTAGE RANGE^Note.7: 85 ~ 264VAC
FREQUENCY RANGE: 47 ~ 63Hz
EFFICIENCY (Typ.): 87%
AC CURRENT: 0.6A / 115VAC 0.35A / 230VAC
INRUSH CURRENT (max.): Cold start 35A / 115VAC 65A / 230VAC
LEAKAGE CURRENT(max.): 0.75mA / 240VAC

PROTECTION

OVERLOAD: 110 ~ 150% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: 110 ~ 140% rated output voltage Protection type : Clamp by zener diode

ENVIRONMENT

WORKING TEMP.: -30 ~ +70℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +85℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT: ±0.03% / ℃ (0 ~ 50℃)
VIBRATION: 10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS^{Note. 8}: UL62368-1, CSA C22.2 No.62368-1, TUV BS EN/EN62368-1, BSMI CNS15598-1 , CCC GB4943.1, PSE J62368-1, AS/NZS 62368.1，BIS IS13252, KC K60950-1, EAC TP TC 004 approved
WITHSTAND VOLTAGE: I/P-O/P:4242VDC, I/P-FG:2121VDC
ISOLATION RESISTANCE: I/P-O/P, I/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION: Parameter Standard Test Level

Conducted emission BS EN/EN55032(CISPR32),FCC PART 15 / CISPR22 CAN ICES-3(B)/NMB-3(B),CNS15936,GB17625.1 EAC TP TC 020,MSIP KN32 Class B
Radiated emission BS EN/EN55032(CISPR32),FCC PART 15 / CISPR22 CAN ICES-3(B)/NMB-3(B),CNS15936,GB17625.1 EAC TP TC 020,MSIP KN32 Class B
Harmonic current BS EN/EN61000-3-2,GB9254 Class A
Voltage flicker BS EN/EN61000-3-3
EMC IMMUNITY: BS EN/EN55035

Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 3, 8KV air; Level 2, 4KV contact
RF field susceptibility BS EN/EN61000-4-3 Level 2, 3V/m
EFT bursts BS EN/EN61000-4-4 Level 2, 1KV
Surge susceptibility BS EN/EN61000-4-5 Level 3, 1KV/Line-Line , 2KV/Line-FG
Conducted susceptibility BS EN/EN61000-4-6 Level 2, 3V
Magnetic field immunity BS EN/EN61000-4-8 Level 2, 3A/m
Voltage dips , interruption BS EN/EN61000-4-11 ＞95% dip 0.5 periods, 30% dip 25 periods, ＞95% interruptions 250 periods

Parameter	Standard	Test Level
Conducted emission	BS EN/EN55032(CISPR32),FCC PART 15 / CISPR22 CAN ICES-3(B)/NMB-3(B),CNS15936,GB17625.1 EAC TP TC 020,MSIP KN32	Class B
Radiated emission	BS EN/EN55032(CISPR32),FCC PART 15 / CISPR22 CAN ICES-3(B)/NMB-3(B),CNS15936,GB17625.1 EAC TP TC 020,MSIP KN32	Class B
Harmonic current	BS EN/EN61000-3-2,GB9254	Class A
Voltage flicker	BS EN/EN61000-3-3

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 3, 8KV air; Level 2, 4KV contact
RF field susceptibility	BS EN/EN61000-4-3	Level 2, 3V/m
EFT bursts	BS EN/EN61000-4-4	Level 2, 1KV
Surge susceptibility	BS EN/EN61000-4-5	Level 3, 1KV/Line-Line , 2KV/Line-FG
Conducted susceptibility	BS EN/EN61000-4-6	Level 2, 3V
Magnetic field immunity	BS EN/EN61000-4-8	Level 2, 3A/m
Voltage dips , interruption	BS EN/EN61000-4-11	＞95% dip 0.5 periods, 30% dip 25 periods, ＞95% interruptions 250 periods

OTHERS

MTBF: 3879.7K hrs min. Telcordia SR-332 (Bellcore) ; 674.6K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 93*54*36mm (L*W*H)
PACKING: 209g; 60pcs/13.5Kg/1.02CUFT

CONNECTOR

PLUG: See page 4~5 ; Other type available by customer requested
CABLE: See page 4~5 ; Other type available by customer requested

Test conditions and notes8

1.All parameters are specified at 230VAC input, rated load, 25℃ 70% RH ambient.
2.DC voltage: The output voltage set at point measure by plug terminal & 50% load.
3.Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1μF & 47μF capacitor.
4.Tolerance: includes set up tolerance, line regulation, load regulation.
5.Line regulation is measured from low line to high line at rated load.
6.Load regulation is measured from 10% to 100% rated load.
7.Derating may be needed under low input voltage. Please check the derating curve for more details.
8.The power supply is considered as an independent unit, but the final equipment still need to re-confirm that the whole system complies with the EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.” (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )

Technical drawings

GST25A18-P1J Derating Curve — Derating Curve

GST25A18-P1J Mechanical Specification — Mechanical Specification

GST25A18-P1J DC output plug — DC output plug

GST25A18-P1J G S T 2 5 A series — G S T 2 5 A series

Typical applications

Consumer electronic devices
Telecommunication devices
Office facilities
Industrial equipments

Downloads

Datasheet1

GST25A18-P1J datasheetGST25A-SPEC.PDF · 2026-04-03 edition PDF Download

Certificates10

UL Certificate (GST25A)(EN) PDF Download

CB Certificate (GST25A)(EN) PDF Download

TUV Certificate (GST25A)(EN) PDF Download

EMC Certificate (GST25A)(EN) PDF Download

FCC Certificate (GST25A)(EN) PDF Download

NRCAN Certificate (GST25A)(EN) PDF Download

ERP Certificate (GST25A)(EN) PDF Download

CCC Certificate (GST25A)(CN) PDF Download

RCM Certificate (GST25A)(EN) PDF Download

PSE Certificate (GST25A)(EN) PDF Download

Test reports1

Test Report (GST25A18)(EN) PDF Download

Catalogues2

Mean Well Adaptor Catalog PDF Download

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the GST25A18-P1J for an 18V industrial control or communications device?

Yes, if the device is built for 18V DC input and its load remains within 1.38A and 25W. This constant-voltage model is suited to lower-power industrial control, interface, or communications hardware that expects a steady 18V supply. The 85-264VAC input also supports broad AC source compatibility.

Is this 18V adapter suitable for embedded systems that need a fixed 18V input?

It can be suitable for embedded systems designed for 18V DC, as long as the total draw does not exceed 1.38A or 25W. Because it is a constant-voltage supply, it should only be used where 18V is the required operating input. It is not intended for lower-voltage devices that rely on the adapter to regulate down.

Can the GST25A18-P1J power small automation equipment or instrumentation?

Yes, for small automation equipment or instrumentation that requires 18V DC and stays within the rated 25W output. The maximum output current is 1.38A, so the connected load must stay at or below that level. The compact body measures 93.0 x 54.0 x 36.0 mm.

Can this power supply be used outdoors?

The specs show an operating temperature range of -30C to +70C, but no IP rating is provided. Without a stated IP rating, the safer interpretation is indoor or otherwise protected use rather than direct outdoor exposure. If used in a more demanding environment, the enclosure would need to provide the protection.

How can I tell if this 18V model is the right match for my equipment?

Your equipment should require 18V DC and draw no more than 1.38A, with total power at or below 25W. Since this is a constant-voltage supply, a device that needs another voltage is not compatible even if its wattage is similar. Matching the required 18V input is the first check.

Payment & Security

Payment methods

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Model	Power	Voltage	Current
Mean Well GST25A12-P1J Power Supply 25W 12V 2.08A	25W	12V	2.08A	View

Please log in to write a review.

{ "id":8655947366720, "variants" :[{ "context":"default", "variant_id": 46625213350208, "sku":"GST25A18-P1J", "inventory_qty" : 5, "customer" :true, "custom_html" :"\u003cdiv class=\"price\"\u003e\n \u003cdiv class=\"price__default\"\u003e\n \u003cstrong class=\"price__current\"\u003e$18.38\u003c\/strong\u003e\n \u003cs class=\"price__was\"\u003e\u003c\/s\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"unit-price relative\" hidden\u003e\u003cspan class=\"visually-hidden\"\u003eUnit price\u003c\/span\u003e\u003cspan class=\"unit-price__price\"\u003e\u003c\/span\u003e\u003cspan class=\"unit-price__separator\"\u003e \/ \u003c\/span\u003e\u003cspan class=\"unit-price__unit\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\n \u003cdiv class=\"price__no-variant\" hidden\u003e\n \u003cstrong class=\"price__current\"\u003eUnavailable\u003c\/strong\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e", "volume_html" :"\u003cvolume-pricing class=\"parent-display inside_product_form\" id=\"volume-pricing-main\" \u003e\u003c\/volume-pricing\u003e" } ] }