STE2 Series High-voltage DC contactor (Round Epoxy Sealing)
Product Features
■ Reliable Encapsulation
• Round epoxy-sealed construction, ensuring IP-rated dust/water resistance for industrial applications.
■ Wide Operating Range
• Voltage: 12-1500VDC; current: 50-800A (e.g., STE2-800: 1000VDC/800A).
• Fully non-polarized load support.
■ Harsh-Environment Ready
• Operating temperature: -45℃ to +85℃; humidity: 5-95% RH.
■ Extended Electrical Life
• Electrical endurance: 100,000 cycles(e.g., STE2-500 at 750VDC/500A).
• Low coil consumption (≤6W for most models).
■ Easy Installation
• External-thread terminals (STE2-150+) for rapid wiring.
Type designation
| Product model | Working voltage | Working current | Load polarity | Coil polarity | Auxiliary contact |
| STE2-50 | 1500 | 50 | Non-polarity | Non-polarity | / |
| STE2-100 | 1500 | 100 | Non-polarity | Non-polarity | / |
| STE2-150 | 1500 | 150 | Non-polarity | Non-polarity | / |
| STE2-200 | 1500 | 200 | Non-polarity | Non-polarity | 1NO |
| STE2-250 | 1500 | 250 | Non-polarity | Non-polarity | 1NO |
| STE2-300 | 1500 | 300 | Non-polarity | Non-polarity | 1NO |
| STE2-400 | 1500 | 400 | Non-polarity | Non-polarity | 1NO |
| STE2-500 | 1500 | 500 | Non-polarity | Non-polarity | 1NO |
| STE2-600 | 1500 | 600 | Non-polarity | Non-polarity | 1NO |
| STE2-800 | 1000 | 800 | Non-polarity | Non-polarity | 1NO |
Technical Specifications
| Product model | STE2-50 | STE2-100 | |
| Contact form | 1H | 1H | |
| Auxiliary contact | / | NO | |
| Contact polarity | Non-polarity | Non-polarity | |
| Contact resistance | ≤1mΩ(at 50A) | ≤1mΩ(at 100A) | |
| Operating voltage | ≤75%Un | ≤75%Un | |
| Maximum breaking current | 50A | 100A | |
| Electrical endurance | 12~1500V | 12~1500V | |
| Maximum breaking current | 500A(320V DC) | 1000A(320V DC) | |
| Electrical endurance | ≥1×10³ times(50A/750VDC) ≥400 times(20A/1000VDC) ≥150 times(10A/1500VDC) |
≥2×10³ times(100A/750VDC) ≥1×10³ times(100A/1000VDC) ≥600 times(15A/1500VDC) |
|
| Current carrying | 50A:Continuous for 100A:10min 200A:50s |
100A:Continuous for 150A:10min 300A:50s |
|
| Dielectric withstand voltage | Between open contacts | 3500VAC | 3500VAC |
| Between contact coils | 3500VAC | 3500VAC | |
| Mechanical Endurance | 2×10⁵ times | 2×10⁵ times | |
| Coil Voltage | 12V,24V | 12V,24V,48V | |
| Coil power consumption | 12V:5.5W 24V:6W | 12V:5.5W 24V:6.0W | |
| Load extraction method | Internal thread | Internal thread | |
| Coil lead out method | lead wire | lead wire | |
| Weight | About 115g | About 160g | |
| Vibrate | 80Hz~2000Hz 49m/s² | 80Hz~2000Hz 49m/s² | |
| Humidity | 5%~95%RH | 5%~95%RH | |
| Humidity range | -45℃~+85℃ | -45℃~+85℃ | |
| External dimensions (mm) | 51.6×35.6×43.2 | 53.8×35.6×58.5 | |
Note:
1.The above parameters are all initial values,measured at room temperature of 23℃.
2.Unless otherwise specified,the electrical durability tests are conducted on resistive loads with a on/off ratio of 0.6s:5s.
| Product model | STE2-150 | STE2-200 | STE2-250 | |
| Contact form | 1H | 1H | 1H | |
| Auxiliary contact | NO | NO | NO | |
| Contact polarity | Non-polarity | Non-polarity | Non-polarity | |
| Contact resistance | ≤1mΩ(at 150A) | ≤1mΩ(at 200A) | ≤1mΩ(at 250A) | |
| Operating voltage | ≤75%Un | ≤75%Un | ≤75%Un | |
| Maximum breaking current | 150A | 200A | 250A | |
| Electrical endurance | 12~1500V | 12~1500V | 12~1500V | |
| Maximum breaking current | 1000A(320VDC) | 2000A(320VDC) | 2000A(320VDC) | |
| Electrical endurance | ≥2×10³ times(100A/750VDC) ≥1×10³ times(150A/1000VDC) ≥600 times(30A/1500VDC) |
≥2×10³ times(200A/750VDC) ≥1×10³ times(200A/1000VDC) ≥1×10³ times(50A/1500VDC) |
≥2×10³ times(250A/750VDC) ≥1×10³ times(250A/1000VDC) ≥1×10³ times(50A/1500VDC) |
|
| Current carrying | 150A:Continuous for 180A:10min 300A:50s |
200A:Continuous for 300A:10min 400A:180s |
250A:Continuous for 300A:10min 400A:180s |
|
| Dielectric withstand voltage | Between open contacts | 3500VAC | 3500VAC | 3500VAC |
| Between contact coils | 3500VAC | 3500VAC | 3500VAC | |
| Mechanical Endurance | 2×10⁵ times | 2×10⁵ times | 2×10⁵ times | |
| Coil Voltage | 12V,24V,36V,48V | 12V,24V,36V,48V | 12V,24V,36V,48V | |
| Coil power consumption | 12V,24V,48V:5.76W 36V:2.5W | 6W | 6W | |
| Load extraction method | External thread | External thread | External thread | |
| Coil lead out method | lead wire | lead wire | lead wire | |
| Weight | About 430g | About 430g | About 430g | |
| Vibrate | 80Hz~2000Hz 49m/s² | 80Hz~2000Hz 49m/s² | 80Hz~2000Hz 49m/s² | |
| Humidity | 5%~95%RH | 5%~95%RH | 5%~95%RH | |
| Humidity range | -45℃~+85℃ | -45℃~+85℃ | -45℃~+85℃ | |
| External dimensions (mm) | 53.8×35.2×59.5 | 80.5×63.6×73.8 | 80.5×63.6×73.8 | |
Note:
1.The above parameters are all initial values,measured at room temperature of 23℃.
2.Unless otherwise specified,the electrical durability tests are conducted on resistive loads with a on/off ratio of 0.6s:5s.
| Product model | STE2-300 | STE2-400 | |
| Contact form | 1H | 1H | |
| Auxiliary contact | NO | NO | |
| Contact polarity | Non-polarity | Non-polarity | |
| Contact resistance | ≤1mΩ(at 300A) | ≤1mΩ(at 400A) | |
| Operating voltage | ≤75%Un | ≤75%Un | |
| Maximum breaking current | 300A | 400A | |
| Electrical endurance | 12~1500V | 12~1500V | |
| Maximum breaking current | 2000A(320V DC) | 2500A(320V DC) | |
| Electrical endurance | ≥2×10³ times(300A/750VDC) ≥1×10³ times(300A/1000VDC) ≥1×10³ times(80A/1500VDC) |
≥3×10³ times(400A/750VDC) ≥1×10³ times(400A/1000VDC) ≥1×10³ times(200A/1500VDC) |
|
| Current carrying | 300A:Continuous for 350A:10min 400A:180s |
400A:Continuous for 500A:10min 600A:180s |
|
| Dielectric withstand voltage | Between open contacts | 3500VAC | 3500VAC |
| Between contact coils | 3500VAC | 3500VAC | |
| Mechanical Endurance | 2×10⁵ times | 2×10⁵ times | |
| Coil Voltage | 12V,24V,36V,48V | 12V,24V,36V | |
| Coil power consumption | 6W | 3W | |
| Load extraction method | External thread | External thread | |
| Coil lead out method | lead wire | lead wire | |
| Weight | About 430g | About 990g | |
| Vibrate | 80Hz~2000Hz 49m/s² | 80Hz~2000Hz 49m/s² | |
| Humidity | 5%~95%RH | 5%~95%RH | |
| Humidity range | -45℃~+85℃ | -45℃~+85℃ | |
| External dimensions (mm) | 80.5×63.6×73.8 | 66.6×78.1×104.5 | |
Note:
1.The above parameters are all initial values,measured at room temperature of 23℃.
2.Unless otherwise specified,the electrical durability tests are conducted on resistive loads with a on/off ratio of 0.6s:5s.
| Product model | STE2-500 | STE2-600 | STE2-800 | |
| Contact form | 1H | 1H | 1H | |
| Auxiliary contact | NO | NO | NO | |
| Contact polarity | Non-polarity | Non-polarity | Non-polarity | |
| Contact resistance | ≤1mΩ(at 500A) | ≤1mΩ(at 600A) | ≤1mΩ(at 800A) | |
| Operating voltage | ≤75%Un | ≤75%Un | ≤75%Un | |
| Maximum breaking current | 500A | 600A | 800A | |
| Electrical endurance | 12~1500V | 12~1500V | 12~1500V | |
| Maximum breaking current | 2500A(320VDC) | 2500A(320V DC) | 2500A(320V DC) | |
| Electrical endurance | ≥2×10³ times(500A/750VDC) ≥1×10³ times(500A/1000VDC) ≥1×10³ times(250A/1500VDC) |
≥2×10³ times(600A/750VDC) ≥1×10³ times(600A/1000VDC) ≥1×10³ times(300A/1500VDC) |
≥600 times(800A/750VDC) ≥1×10³ times(450A/1000VDC) ≥200 times(350A/1500VDC) |
|
| Current carrying | 500A:Continuous for 550A:10min 600A:180s |
600A:Continuous for 650A:10min 700A:180s |
800A:Continuous for 900A:10min 1000A:120s |
|
| Dielectric withstand voltage | Between open contacts | 3500VAC | 3500VAC | 3500VAC |
| Between contact coils | 3500VAC | 3500VAC | 3500VAC | |
| Mechanical Endurance | 2×10⁵ times | 2×10⁵ times | 2×10⁵ times | |
| Coil Voltage | 12V,24V,36V | 12V,24V,36V | 12V,24V,36V | |
| Coil power consumption | 3W | 3W | 3W | |
| Load extraction method | External thread | External thread | External thread | |
| Coil lead out method | lead wire | lead wire | lead wire | |
| Weight | About 990g | About 990g | About 990g | |
| Vibrate | 80Hz~2000Hz 49m/s² | 80Hz~2000Hz 49m/s² | 80Hz~2000Hz 49m/s² | |
| Humidity | 5%~95%RH | 5%~95%RH | 5%~95%RH | |
| Humidity range | -45℃~+85℃ | -45℃~+85℃ | -45℃~+85℃ | |
| External dimensions (mm) | 66.6×78.1×104.5 | 66.6×78.1×104.5 | 66.6×78.1×104.5 | |
Note:
1.The above parameters are all initial values,measured at room temperature of 23℃.
2.Unless otherwise specified,the electrical durability tests are conducted on resistive loads with a on/off ratio of 0.6s:5s.
Why Choose CHAC
With 30+ years of manufacturing experience, 1100+ employees, 100M+ poles
annual capacity and 90% automated production, CHAC provides stable production capacity and strict
quality control for global OEM/ODM customers. Our in-house manufacturing system supports long-term
cooperation for electrical brands, importers and distributors.
30+
YEARS EXPERIENCE
Specialized in low-voltage electrical manufacturing
1100+
EMPLOYEES
Professional team ensures stable quality and delivery
100M+
POLES ANNUAL CAPACITY
Large-scale production capacity to meet global demand
90%
AUTOMATED PRODUCTION
Advanced automation for high efficiency and consistency
Automated Assembly Line
Testing Laboratory
Injection & Stamping
Quality Inspection
Strict quality control system ensures every product meets global standards.
What Can We Customize?
CHAC supports customization of coil voltage, auxiliary contact configuration,
electrical parameters, product branding,packaging design and engineering development according to customers’ equipment and market requirements.
Coil Voltage
AC and DC coil voltage options tailored to application requirements.
Auxiliary Contacts
Flexible auxiliary contact combinations for different control functions.
Electrical Parameters
Current ratings, protection ranges and functional parameters can be customized.
Product Branding
Private label logos, nameplates and product identification support.
Packaging Design
Custom cartons, labels, manuals and packaging solutions.
Engineering Development
Support from drawing optimization to product development and application matching.
Download
STE Series High Voltage DC Contactor
Complete product overview for low-voltage electrical components and product selection reference.
Need Technical Documents?
Contact us for datasheets, certificates, drawings, selection guidance or OEM/ODM project support.
Frequently Asked Questions
Q1. Do you support product customization based on our design requirements?
A1:Absolutely. We specialize in OEM and ODM cooperation in the low-voltage electrical field and have provided customized services for many internationally renowned companies. We offer full-process support, including R&D design, parameter adjustments, and special material selection, ensuring the product fully meets your requirements.
Q2: What is your production capacity and Minimum Order Quantity (MOQ)?
A2: We operate a highly automated production base with an annual output of over 100 million poles for miniature circuit breakers. Our MOQ policy is flexible. We can provide competitive trial orders for small batches and dedicated production capacity guarantee plans.
Q3: What assurances are there for product quality and certifications?
A3: Our main products are certified with CCC, CE, CB, and more, and are sold in over 30 countries and regions worldwide. The company has established a dedicated Quality Operations Center that works with the business and production departments to implement full-process quality control, ensuring products meet international standards.
Q4: Do you have the capability for product R&D and turning concepts into reality?
A4: We have a complete R&D team and digital workshops, backed by extensive customization experience serving numerous international clients. From concept proposal and sample development to mass production, we provide end-to-end technical support to help bring your ideas to life.
