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Mean Well

Mean Well GST40A12-P1J Power Supply 40W 12V 3.34A

SKU GST40A12-P1J
$20.01 USD
Shipping calculated at checkout.

Select model — 14 in this family

GST40A12-P1J
In stock
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Overview

GST40A12-P1J is the 12V output model of this series: rated current 3.34A, typical efficiency 89.5%. Type P1J: Standard model,2.1 φ x5.5 φ x11mm,C+,tuning fork type.

GST40A is a highly reliable, 40W 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 90VAC 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 92% and the extremely low no-load power consumption below 0.075W,GST40A 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.GST40A 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

GST40A12-P1JSpecifications from the official datasheet (2026-04-03 edition)

OUTPUT

SAFETY MODEL NO.
GST40A12
DC VOLTAGENote.2
12V
RATED CURRENT
3.34A
CURRENT RANGE
0 ~ 3.34A
RATED POWER (max.)
40W
RIPPLE & NOISE (max.)Note.3
120mVp-p
VOLTAGE TOLERANCENote.4
±3.0%
LINE REGULATIONNote.5
±1.0%
LOAD REGULATION
±3.0%
SETUP, RISE TIMENote.6
1000ms, 50ms / 230VAC 1000ms, 50ms / 115VAC at full load
HOLD UP TIME (Typ.)
50ms / 230VAC 15ms / 115VAC at full load

INPUT

VOLTAGE RANGE
90 ~ 264VAC
FREQUENCY RANGE
47 ~ 63Hz
EFFICIENCY (Typ.)
89.5%
AC CURRENT (Typ.)
1A / 115VAC 0.5A / 230VAC
INRUSH CURRENT (max.)
Cold start 35A / 115AC 65A / 230VAC
LEAKAGE CURRENT(max.)
0.75mA / 240VAC

PROTECTION

OVERLOAD
105 ~ 150% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE
12.6 ~ 16.2V Protection type : Shut down o/p voltage, re-power on to recover

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 (Note. 9)

SAFETY STANDARDSNote. 7
UL62368-1, CSA C22.2 No.62368-1, TUV BS EN//EN62368-1, BSMI CNS 15598-1 , 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:3KVAC I/P-FG:2KVAC O/P-FG:0.5KVAC
ISOLATION RESISTANCE
I/P-O/P, I/P-FG, O/P-FG:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION
ParameterStandardTest Level
Conducted emissionBS EN/EN55032(CISPR32),FCC PART 15 / CISPR22 CAN ICES-3(B)/NMB-3(B),CNS15936,GB17625.1 EAC TP TC 020,MSIP KN32Class B
Radiated emissionBS EN/EN55032(CISPR32),FCC PART 15 / CISPR22 CAN ICES-3(B)/NMB-3(B),CNS15936,GB17625.1 EAC TP TC 020,MSIP KN32Class B
Harmonic currentBS EN/EN61000-3-2,GB9254Class A
Voltage flickerBS EN/EN61000-3-3
EMC IMMUNITY

BS EN/EN55035

ParameterStandardTest Level
ESDBS EN/EN61000-4-2Level 4, 15KV air; Level 4, 8KV contact
RF field susceptibilityBS EN/EN61000-4-3Level 2, 3V/m
EFT burstsBS EN/EN61000-4-4Level 2, 1KV
Surge susceptibilityBS EN/EN61000-4-5Level 3, 1KV/Line-Line , 2KV/Line-FG
Conducted susceptibilityBS EN/EN61000-4-6Level 2, 3V
Magnetic field immunityBS EN/EN61000-4-8Level 2, 3A/m
Voltage dips , interruptionBS EN/EN61000-4-11＞95% dip 0. 5 periods, 30% dip 25 periods, ＞95% interruptions 250 periods

OTHERS

MTBF
3493.6K hrs min. Telcordia SR-332 (Bellcore) ; 728.2K hrs min. MIL-HDBK-217F (25℃)
DIMENSION
125*50*31.5mm (L*W*H)
PACKING
0.28Kg; 40pcs/12.02Kg/1.04CUFT

CONNECTOR

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

MODEL ENCODING

P1J (this model)
Standard model,2.1 φ x5.5 φ x11mm,C+,tuning fork type
Blank
Other options available by customer requested (see Page 4~5)
Test conditions and notes8
  1. 1. All parameters are specified at 230VAC input, rated load, 25℃ 70% RH ambient.
  2. 2. DC voltage: The output voltage set at point measure by plug terminal & 50% load.
  3. 3. Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1μF & 47μF capacitor.
  4. 4. Tolerance: includes set up tolerance, line regulation, load regulation.
  5. 5. Line regulation is measured from low line to high line at rated load.
  6. 6. Length of set up time is measured at first cold start. Turning ON/OFF the power supply may lead to increase of the set up time.
  7. 7. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than 2000m(6500ft).
  8. 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

GST40A12-P1J Derating Curve
Derating Curve
GST40A12-P1J Mechanical Specification
Mechanical Specification
GST40A12-P1J DC output plug
DC output plug

Typical applications

  • Consumer electronic devices
  • Telecommunication devices
  • Office facilities
  • Industrial equipments

Downloads

FAQ

Can I use the GST40A12-P1J for a 12V industrial control panel or small automation device?

It can fit 12V control or automation equipment that requires constant voltage and stays within 40W total load. This model provides 12V output at up to 3.34A and accepts 90-264VAC input, which suits many standard AC-powered industrial environments.

Is this power supply suitable for embedded electronics or test benches that need regulated 12V DC?

Yes, if the equipment is designed for a constant 12V source and draws no more than 3.34A or 40W. The constant voltage output is intended for loads that need a fixed 12V supply rather than a variable output.

Can I use this 12V 40W adapter for low-power HMI or monitoring hardware?

It is appropriate for 12V HMI, monitoring, or interface hardware when the combined demand stays within 40W. With 12V output and 3.34A maximum current, it is better matched to low-to-moderate power devices than larger 12V systems.

Will this work for a compact 12V communications or embedded controller load?

It can, provided the controller or communications device requires constant 12V DC and does not exceed 3.34A. The 90-264VAC input range also makes it easier to use in locations with different standard AC supply ranges.

Is the GST40A12-P1J suitable for outdoor or harsh-environment use?

The published specs define an operating temperature range of -30°C to +70°C, but no IP rating is listed. That means temperature capability is stated, while dust or water protection is not, so it is better suited to protected indoor locations or enclosed systems unless external protection is provided.

Payment & Security

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Mean Well GST40A12-P1J Power Supply 40W 12V 3.34A
Mean Well

Mean Well GST40A12-P1J Power Supply 40W 12V 3.34A

$20.01 USD

GST40A12-P1J is the 12V output model of this series: rated current 3.34A, typical efficiency 89.5%. Type P1J: Standard model,2.1 φ x5.5 φ x11mm,C+,tuning fork type.

GST40A is a highly reliable, 40W 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 90VAC 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 92% and the extremely low no-load power consumption below 0.075W,GST40A 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.GST40A 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

Typical applications

  • Consumer electronic devices
  • Telecommunication devices
  • Office facilities
  • Industrial equipments

Model

  • 18W 12V 2 Pole
  • 18W 12V 3 Pole
  • 25W 12V 2 Pole
  • 25W 12V 3 Pole
  • 36W 12V 2 Pole
  • 40W 12V 3 Pole
  • 60W 12V 3 Pole
  • 80W 12V 3 Pole
  • 102W 12V 3 Pole
  • 138W 12V 3 Pole
  • 180W 12V 3 Pole
  • 252W 12V 3 Pole
  • 330W 12V 8Pin A
  • 330W 12V 8Pin B
View product

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