High Performance High Power Programmable DC Electronic Load Tester

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• Product Description
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• Company Profile
• Company Advantages
• Certifications
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• FAQ

Overview

Basic Info.

Model NO.	DH8311
Certification	RoHS, CE
AC Input Voltage Range	AC90-264V 50Hz/60Hz
Cooling Method	Forced Air Cooling
Operating Temperature,	0~40℃
Storage Temperature	-20~70℃
Transport Package	Carton
Trademark	Expansuccess
Origin	China
HS Code	9030899090
Production Capacity	50000/ Year

Product Description

Product Description

This series electronic loads feature enhanced transient testing capabilities and multi-dimensional intelligent analysis, seamlessly integrated with automated testing functions. They are particularly suitable for mass production and incoming material inspection in power supply and related industries. With programmable current rise rates and a unique synchronous master-slave parallel operation timing, these devices meet the synchronization requirements for multiple output power supplies under load, as well as the power expansion needs of single-output systems.

key feature1.Maximum power: 1200W; Maximum current: 240A; Maximum voltage: 1200V.2.Measurement of voltage/current (Vpp/Ipp), peak value (Vp+/Ip+), and valley value (Vp-/Ip-).3.Programmable current rise/fall rate.4.Four basic operating modes: constant current, constant voltage, constant power, and constant resistance.5.Supports LED simulation function.6.Dynamic load mode up to 50KHz (DYNA), with measurement of voltage peaks and troughs (Vp+) and current peaks and troughs (Ip+ and Ip-)7.Supports ripple measurement up to 20MHz.

8.Supports overcurrent protection testing (OCP).9. Supports timing measurement.10.Supports short-circuit (Short) simulation.11.Supports battery level testing (Battery).12.Supports remote compensation.13.Supports Von and Voff functions.14.High-brightness 5-inch full-view touchscreen graphic dot-matrix display.15.Overvoltage/overcurrent/overpower/overheat protection.16. Intelligent fan system.17. Electrical isolation, external trigger input.18.Electrical isolation with standard RS232 interface.19.Standard SCPI protocol.

Single-channel

		DH-8311		DH-8321		DH-8331		DH-8341
Rated input	Power	150W		300W		600W		1200W
	Voltage	0~15V	0~150V	0~15V	0~150V	0~15V	0~150V	0~15V	0~150V
	Current	0~3A	0~30A	0~6A	0~60A	0~12A	0~120A	0~24A	0~240A
	Minimum operating voltage	1V@30A		1V@60A		1.4V@120A		1.8V@240A
CC	range	0~3A	0~30A	0~6A	0~60A	0~12A	0~120A	0~24A	0~240A
	fineness modulus	0.5mA	1mA	0.5mA	1mA	1mA	10mA	1mA	10mA
	fineness modulus	0.05%+0.05%FS
CV	range	0~15V	0~150V	0~15V	0~150V	0~15V	0~150V	0~15V	0~150V
	fineness modulus	0.5mV	3mV	0.8mV	8mV	1mV	10mV	1.3mV	13mV
	Precision	0.03%+0.05%FS
CP	range	150W		300W		600W		1200W
	fineness modulus	16Bits
	Precision	0.1%+0.1%FS
CR	range	0.05Ω~50KΩ		0.05Ω~50KΩ		0.05Ω~50KΩ		0.05Ω~50KΩ
	fineness modulus	16Bits
	Precision	(0.1+0.01R)%		(0.1+0.01R)%		(0.1+0.02R)%		(0.1+0.02R)%
LED	Bandwidth	>100kHz
	Rd Coefficient range	0.001~1
Dynamic operation mode	range	1mS~50S
	fineness modulus	1msS
	Precision	1mS+20PPM
	Compression ratio	0.6A/mS~3A/uS		0.6A/mS~3A/uS		1.2A/mS~3A/uS		1.2A/mS~3A/uS
Voltage measurement	range	0~15V	0~150V	0~15V	0~150V	0~15V	0~150V	0~15V	0~150V
	resolution ratio	0.1mV	1mV	0.1mV	1mV	0.1mV	1mV	0.1mV	1mV
	Precision	0.02%+0.05%FS
Current measurement	range	0~3A	0~30A	0~6A	0~60A	0~12A	0~120A	0~24A	0~240A
	resolution ratio	0.1mA	1mA	0.1mA	2mA	0.2mA	2mA	0.2mA	2mA
	Precision	0.03%+0.05%FS
Ripple measurement	range	0~2V
	Bandwidth	10Hz~20MHz
	resolution ratio	1mV

		DH-8311M		DH-8321M		DH-8331M		DH-8341M
Rated input	Power	150W		300W		600W		1200W
	Voltage	0~60V	0~600V	0~60V	0~600V	0~60V	0~600V	0~60V	0~600V
	Current	0~1.5A	0~15A	0~3A	0~30A	0~6A	0~60A	0~12A	0~120A
	Minimum operating voltage	0~1.5A	0~15A	0~3A	0~30A	0~6A	0~60A	0~12A	0~120A
CC	range	0.5mA	1mA	0.5mA	1mA	0.5mA	1mA	1mA	10mA
	fineness modulus	0.05%+0.05%FS
	fineness modulus	0~60V	0~600V	0~60V	0~600V	0~60V	0~600V	0~60V	0~600V
CV	range	0.5mV	3mV	0.8mV	8mV	1mV	10mV	1.3mV	13mV
	fineness modulus	0.03%+0.03%FS
	Precision	150W		300W		600W		1200W
CP	range	16Bits
	fineness modulus	0.1%+0.1%FS
	Precision	0.05Ω~50KΩ		0.05Ω~50KΩ		0.05Ω~50KΩ		0.05Ω~50KΩ
CR	range	16Bits
	fineness modulus	(0.1+0.01R)%		(0.1+0.01R)%		(0.1+0.02R)%		(0.1+0.02R)%
	Precision	>100kHz
LED	Bandwidth	0.001~1
	Rd Coefficient range	10uS~50S
Dynamic operation mode	range	1mS
	fineness modulus	1mS+20PPM
	Precision	0.6A/mS~3A/uS		0.6A/mS~3A/uS		1.2A/mS~3A/uS		1.2A/mS~3A/uS
	Compression ratio	0~60V	0~600V	0~60V	0~600V	0~60V	0~600V	0~60V	0~600V
Voltage measurement	range	1mV	10mV	1mV	10mV	1mV	10mV	1mV	10mV
	resolution ratio	0.02%+0.05%FS
	Precision	0~1.5A	0~15A	0~3A	0~30A	0~6A	0~60A	0~12A	0~120A
Current measurement	range	0.01mA	0.1mA	0.01mA	0.1mA	0.2mA	1mA	0.5mA	10mA
	resolution ratio	0.03%+0.05%FS
	Precision	0.03%+0.05%FS
Ripple measurement	range	0~2V
	Bandwidth	10Hz~20MHz
	resolution ratio	1mV

		DH-8311H		DH-8321H		DH-8331H		DH-8341H
Rated input	Power	150W		300W		600W		1200W
	Voltage	0~120V	0~1200V	0~120V	0~1200V	0~120V	0~1200V	0~120V	0~1200V
	Current	0~0.6A	0~6A	0~1.5A	0~15A	0~3A	0~30A	0~6A	0~60A
CC	Range	0~0.6A	0~6A	0~1.5A	0~15A	0~3A	0~30A	0~6A	0~60A
	Fineness	0.05mA	0.5mA	0.05mA	0.5mA	0.1mA	1mA	0.1mA	1mA
	Precision	0.05%+0.05%FS
CV	Range	0~120V	0~1200V	0~120V	0~1200V	0~120V	0~1200V	0~120V	0~1200V
	Fineness	1mV	10mV	1mV	10mV	1mV	10mV	1mV	10mV
	Precision	0.03%+0.03%FS
CP	Range	150W		300W		600W		1200W
	Fineness	16Bits
	Precision	0.1%+0.1%FS
CR	Range	0.05Ω~50KΩ		0.05Ω~50KΩ		0.05Ω~50KΩ		0.05Ω~50KΩ
	Fineness	16Bits
	Precision	(0.1+0.01R)%		(0.1+0.01R)%		(0.1+0.02R)%		(0.1+0.02R)%
LED	Bandwidth	>100kHz
	Rd	0.001~1
Dynamic operation mode	Range	1mS~50S
	Fineness	1sS
	Precision	1mS+20PPM
	Compression ratio	0.6A/mS~3A/uS		0.6A/mS~3A/uS		1.2A/mS~3A/uS		1.2A/mS~3A/uS
Voltage measurement	Range	0~120V	0~1200V	0~120V	0~1200V	0~120V	0~1200V	0~120V	0~1200V
	Resolution	1mV	10mV	1mV	10mV	1mV	10mV	1mV	10mV
	Precision	0.02%+0.03%FS
Current measurement	Range	0~0.6A	0~6A	0~1.5A	0~15A	0~3A	0~30A	0~6A	0~60A
	Resolution	0.05mA	0.5mA	0.05mA	0.5mA	0.1mA	1mA	0.1mA	1mA
	Precision	0.03%+0.05%FS

Multi-channel

		DH-8312		DH-8322		DH-8314		DH-8318
Rated input	Power	150W*2		300W*2		150W*4		150W*8
	Voltage	0~15V	0~150V	0~15V	0~150V	0~15V	0~150V	0~15V	0~150V
	Current	0~3A	0~30A	0~6A	0~60A	0~3A	0~30A	0~3A	0~30A
CC	Range	0~3A	0~30A	0~6A	0~60A	0~3A	0~30A	0~3A	0~30A
	Fineness	0.05mA	0.5mA	0.05mA	0.5mA	0.05mA	0.5mA	0.05mA	0.5mA
	Precision	0.05%+0.05%FS
CV	Range	0~15V	0~150V	0~15V	0~150V	0~15V	0~150V	0~15V	0~150V
	Fineness	0.2mV	2mV	0.2mV	2mV	0.2mV	2mV	0.2mV	2mV
	Precision	0.05%+0.05%FS
CP	Range	150W		300W		150W		150W
	Fineness	16Bits
	Precision	0.1%+0.1%FS
CR	Range	0.05Ω~50KΩ		0.05Ω~50KΩ		0.05Ω~50KΩ		0.05Ω~50KΩ
	Fineness	16Bits
	Precision	(0.1+0.01R)%		(0.1+0.01R)%		(0.1+0.02R)%		(0.1+0.01R)%
LED	Bandwidth	>100kHz
	Rd	0.001~1
Dynamic operation mode	Range	1msS~50S
	Fineness	1mS
	Precision	1mS+20PPM
	Compression ratio	0.6A/mS~3A/uS		0.6A/mS~3A/uS		1.2A/mS~3A/uS		0.6A/mS~3A/uS
Voltage measurement	Range	0~15V	0~150V	0~15V	0~150V	0~15V	0~150V	0~15V	0~150V
	Resolution	0.1mV	1mV	0.1mV	1mV	0.1mV	1mV	0.1mV	1mV
	Precision	0.02%+0.05%FS
Current measurement	Range	0~3A	0~30A	0~6A	0~60A	0~3A	0~30A	0~3A	0~30A
	Resolution	0.01mA	0.1mA	0.01mA	0.2mA	0.02mA	0.2mA	0.01mA	0.1mA
	Precision	0.03%+0.05%FS
Ripple measurement	Range	0~2V
	Bandwidth	10Hz~20MHz
	Resolution	1mV

		DH-8312M		DH-8322M		DH-8314M		DH-8318M
Rated input	Power	150W*2		300W*2		150W*4		150W*8
	Voltage	0~60V	0~600V	0~60V	0~600V	0~60V	0~600V	0~60V	0~600V
	Current	0~1.5A	0~15A	0~3A	0~30A	0~1.5A	0~15A	0~1.5A	0~15A
CC	Range	0~1.5A	0~15A	0~3A	0~30A	0~1.5A	0~15A	0~1.5A	0~15A
	Fineness	0.05mA	0.5mA	0.05mA	0.5mA	0.05mA	0.5mA	0.05mA	0.5mA
	Precision	0.05%+0.05%FS
CV	Range	0~60V	0~600V	0~60V	0~600V	0~60V	0~600V	0~60V	0~600V
	Fineness	0.5mV	2mV	0.5mV	2mV	0.5mV	2mV	0.5mV	2mV
	Precision	0.05%+0.05%FS
CP	Range	150W		300W		150W		150W
	Fineness	16Bits
	Precision	0.1%+0.1%FS
CR	Range	0.05Ω~50KΩ		0.05Ω~50KΩ		0.05Ω~50KΩ		0.05Ω~50KΩ
	Fineness	16Bits
	Precision	(0.1+0.01R)%		(0.1+0.01R)%		(0.1+0.02R)%		(0.1+0.01R)%
LED	Bandwidth	>100kHz
	Rd	0.001~1
Dynamic operation mode	Range	10uS~50S
	Fineness	2uS
	Precision	1uS+20PPM
	Compression ratio	0.6A/mS~3A/uS		0.6A/mS~3A/uS		1.2A/mS~3A/uS		1.2A/mS~3A/uS
Voltage measurement	Range	0~60V	0~600V	0~60V	0~600V	0~60V	0~600V	0~60V	0~600V
	Resolution	0.5mV	2mV	0.5mV	2mV	0.5mV	2mV	0.5mV	2mV
	Precision	0.02%+0.05%FS
Current measurement	Range	0~1.5A	0~15A	0~3A	0~30A	0~1.5A	0~15A	0~1.5A	0~15A
	Resolution	0.01mA	0.1mA	0.01mA	0.1mA	0.02mA	0.2mA	0.02mA	0.2mA
	Precision	0.03%+0.05%FS

Main Products

Company Profile

Guangzhou Expansuccess Technology Co., Ltd., founded in 2026, is a professional high-tech enterprise integrating R&D, production, manufacturing and global sales of variable frequency power supplies and power testing equipment. Adhering to the core values of Quality First, Integrity-Based and Customer Foremost, the company has been committed to providing stable, high-performance and intelligent power solutions for manufacturers, laboratories and industrial users around the world since its establishment. We focus on solving key power supply challenges in product R&D testing, production aging, quality inspection and reliability verification for export-oriented enterprises. With advanced design concepts, strict production control and professional technical capabilities, we provide precision, efficiency, stability and clean power solutions to help customers improve product quality, optimize production efficiency and enhance international market competitiveness. Our main products include single-phase variable frequency power supplies, three-phase variable frequency power supplies, programmable variable frequency power supplies, single-phase transformers, three-phase transformers, programmable electronic loads and high-voltage power supplies. These products are widely used in home appliance manufacturing, motor testing, electronic manufacturing, IT industry, computer equipment, communication equipment, new energy, laboratory research and industrial automation fields. They are especially suitable for international markets with different voltage and frequency standards such as 110V/60Hz, 220V/50Hz, 220V/60Hz, 380V/50Hz and 400V/60Hz. At present, our products have been exported to many countries and regions in Europe, the United States, South America, Asia and the Middle East, and have obtained EU CE certification, which fully meets the access requirements of the international market. Relying on reliable quality, superior performance and complete supporting services, we have won high recognition and trust from customers at home and abroad. We provide customers with comprehensive after-sales service system, including one-year free whole-machine warranty, lifetime maintenance, free on-site operation training and full-range technical guidance. From product selection, scheme design to installation, commissioning and after-sales support, we provide customers with one-stop integrated power protection solutions, truly realizing the full-cycle service from equipment supply to system guarantee. Guangzhou Expansuccess Technology will continue to take technological innovation as the driving force, quality as the foundation, and customers as the center. We are determined to become a reliable global partner in the field of variable frequency power supplies and power testing equipment, and help more Chinese manufacturing products go to the world smoothly.

Company Advantages

Certifications

Buyer Group Photo

Packaging & Shipping

FAQ1. What is a Variable Frequency Drive (VFD)?A Variable Frequency Drive (VFD) is an electronic device used to convert the frequency of an input AC signal into a desired output frequency. It is typically used to regulate the speed of electric motors or to adapt power systems to meet varying voltage and frequency requirements. 2. What is a transformer? How does it work?A transformer is an electrical device that transfers electrical energy between two or more circuits through the principle of electromagnetic induction. Depending on the requirements of the power system, it can step up (increase) or step down (decrease) voltage levels. 3. What is an electronic load tester?An electronic load tester is a device used to simulate the operating conditions of a power supply or battery under actual load scenarios. It facilitates the testing of the performance of power supplies, batteries, and other electrical equipment under controlled conditions. 4. What is a DC power supply?A DC power supply provides a stable output of Direct Current (DC) voltage. It is commonly used to power various electronic devices, charge batteries, conduct laboratory testing, and for other similar applications. 5. Can all products be customized?Yes, customization is available; however, you will need to provide us with your detailed customization requirements. Shipping & Delivery 6. How long will it take to receive my order?Delivery times depend on your shipping address and the shipping method you select. Generally, the timeframe is determined by the specific product parameters and whether any customization is required. Please contact us directly for an exact delivery time estimate. 7. Do you offer international shipping?Yes, we offer international shipping services to most countries. Shipping costs and delivery times vary depending on your shipping address and the size of your order. You can obtain a shipping cost estimate during the checkout process. 8. Can I track my order?
Yes, once your order has been shipped, you will receive a tracking number via email, allowing you to monitor the delivery status of your package in real-time.
We have a dedicated logistics team with specialists assigned to track and follow up on your order.

Orders & Payment

9. What payment methods do you accept?
We accept a variety of payment methods, including credit/debit cards (Visa, MasterCard, American Express), PayPal, and bank transfers.

10. Will I have to pay taxes or customs duties?
International orders may be subject to customs duties and taxes in accordance with the regulations of the destination country. For specific details, please consult your local customs authority.
We can also offer shipping channels that include customs duties in the total cost. Please contact us directly for specific details.

11. Can I modify my order after placing it?
Orders can only be modified prior to shipment. If you need to make any changes to your order, please contact our customer service team immediately. After-Sales Support

12. What is your warranty policy?
We offer warranty coverage for most of our products. The standard warranty period is typically one year from the date of purchase. For specific warranty terms, please refer to the details provided on the respective product pages.

13. How do I return or exchange a product?
If you are not satisfied with your purchase, please contact our customer service team within 7 days of receiving the product to obtain instructions for a return or exchange. Returned or exchanged items must be unused and in their original condition.

14. How can I obtain technical support for a product?
If you encounter any technical issues, please contact our support team via email or phone. Our technical experts will assist you with troubleshooting and provide solutions for various product-related issues.