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STE1 Series High-voltage DC contactor (Square Ceramic Sealing)STE1 Series High-voltage DC contactor (Square Ceramic Sealing)
STE1 Series High-voltage DC contactor (Square Ceramic Sealing)STE1 Series High-voltage DC contactor (Square Ceramic Sealing)
  1. STE1 Series High-voltage DC contactor (Square Ceramic Sealing)STE1 Series High-voltage DC contactor (Square Ceramic Sealing)
  2. STE1 Series High-voltage DC contactor (Square Ceramic Sealing)STE1 Series High-voltage DC contactor (Square Ceramic Sealing)

STE1 Series High-voltage DC contactor (Square Ceramic Sealing)STE1 Series High-voltage DC contactor (Square Ceramic Sealing)

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Product Features

■ Advanced Sealing Technology

•Square ceramicencapsulated design, offering superior hightemperature resistance andcorrosion protection for environments ≥1500VDC.

■ UltraHigh Voltage Support

•Operating voltage range: 750VDC to 1800VDC(e.g., STE1400).

■ HighCurrent Handling

•Rated current: 40A600A; peak breaking capacity up to 2500A (at 300VDC).

•Shortterm overload endurance (e.g., STE1600: 800A for 20 minutes).

Type designation

Product model Working voltage Working current Load polarity Coil polarity Auxiliary contact
STE1-40 1500 40 Non-polarity Non-polarity /
STE1-60 1000 60 Non-polarity Non-polarity /
STE1-100 1000 100 Having polarity Non-polarity /
STE1-150 750 150 Non-polarity Non-polarity /
STE1-200 750 200 Having polarity Non-polarity /
STE1-L200 1000 200 Non-polarity Non-polarity 1NO
STE1-L300 1000 300 Non-polarity Non-polarity 1NO
STE1-X300 1000 300 Non-polarity Non-polarity /
STE1-300 1000 300 Having polarity Having polarity /
STE1-300D 1500 300 Non-polarity Non-polarity 1NO
STE1-350 1500 350 Non-polarity Having polarity 1NO
STE1-400 1500 400 Non-polarity Non-polarity 1NO
STE1-600 1000 600 Having polarity Having polarity /

Technical Specifications

Product model STE140 STE160
Contact form 1H 1H
Auxiliary contact / /
Contact polarity Non-polanity Non-polanity
Contact resistance ≤5mΩ(at 40A) ≤5mΩ(at 60A)
Operating voltage ≤75%Un ≤75%Un
Maximum breaking current 40A 60A
Electrical endurance 10~1500V 10~1000V
Maximum breaking current 400A(300VDC) 600A(300VDC)
Electrical endurance ≥300 times(40AV1500VDC) ≥1×10⁴times(60A/750VDC)
≥5×10³times(60A/1000VDC)“
Current carrying 40A:Continuous for 60A:60min 160A:10s 60A:Continuous for 80A:20min 160A:40s
Dielectric withstand voltage Between open contacts 3000VAC 3000VAC
Between contact coils 4000VAC 4000VAC
Mechanical Endurance 2×105times 2×105times
Coil Voltage 12V,24V 12V,24V
Coil power consumption 3W 3W
Load extraction method Internal thread Internal thread
Coil lead out method Connector Connector
Weight About 180g About 180g
Vibrate 10Hz~500Hz 49m/s² 10Hz~500Hz 49m/s²
Humidity 5%~85%RH 5%~85%RH
Humidity range -40℃~+85℃ -40℃~+85℃
External dimensions/mm 79.2×36.7×48 79.2×36.7×48

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:54s.

Product model STE1-100 STE1-150 STE1-200
Contact form 1H 1H 1H
Auxiliary contact / / /
Contact polarity Having polarity Non-polarity Having polarity
Contact resistance ≤1mΩ(at 100A) ≤5mΩ(at 150A) ≤0.5mΩ(at 200A)
Operating voltage ≤75%Un ≤75%Un ≤75%Un
Maximum breaking current 100A 150A 200A
Electrical endurance 10~1000V 10~750V 10~750V
Maximum breaking current 1000A(300VDC) 1500A(300VDC) 2000A(300VDC)
Electrical endurance ≥6×10³ times(100A/750VDC)
≥5×10³ times(100A/1000VDC)		 ≥1.5×10³ times(150A/450VDC)
≥500 times(150A/750VDC)		 ≥1×10³ times(200A/450VDC)
≥500 times(200A/750VDC)
Current carrying 100A:Continuous for
120A:2h 200A:10min		 150A:Continuous for
180A:2h 225A:15min		 200A:Continuous for
250A:15min 320A:5min
Dielectric withstand voltage Between open contacts 3000VAC 3000VAC 3000VAC
Between contact coils 4000VAC 4000VAC 4000VAC
Mechanical Endurance 2×10⁵ times 2×10⁵ times 2×10⁵ times
Coil Voltage 12V,24V 12V,24V 12V,24V
Coil power consumption 4.5W 4.5W 6W
Load extraction method Copper bar connection Copper bar connection Internal thread
Coil lead out method Connector Connector Connector
Weight About 400g About 400g About 350g
Vibrate 10Hz~500Hz 49m/s² 10Hz~500Hz 49m/s² 10Hz~500Hz 49m/s²
Humidity 5%~85%RH 5%~85%RH 5%~85%RH
Humidity range -40℃~+85℃ -40℃~+85℃ -40℃~+85℃
External dimensions (mm) 81.5×40×78.3 81.5×40×78.3 81×39×70

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 STE1-L200 STE1-L300
Contact form 1H 1H
Auxiliary contact 1NO 1NO
Contact polarity Non-polarity Non-polarity
Contact resistance ≤0.5mΩ(at 200A) ≤0.3mΩ(at 300A)
Operating voltage ≤75%Un ≤75%Un
Maximum breaking current 200A 300A
Electrical endurance 10~1000V 10~1000V
Maximum breaking current 1000A(300VDC) 2000A(300VDC)
Electrical endurance ≥5×10³ times(200A/450VDC)
≥1×10³ times(200A/750VDC)
≥300 times(200A/1000VDC)		 ≥2×10³ times(300A/450VDC)
≥700 times(300A/750VDC)
≥300 times(300A/1000VDC)
Current carrying 200A:Continuous for
300A:30min 400A:5min		 300A:Continuous for
450A:5min 600A:1min
Dielectric withstand voltage Between open contacts 4000VAC 4000VAC
Between contact coils 4000VAC 4000VAC
Mechanical Endurance 2×10⁵ times 2×10⁵ times
Coil Voltage 12V,24V 12V,24V
Coil power consumption 3W 4.5W
Load extraction method Internal thread Internal thread
Coil lead out method lead wire lead wire
Weight About 185g About 320g
Vibrate 10Hz~500Hz 49m/s² 10Hz~500Hz 49m/s²
Humidity 5%~85%RH 5%~85%RH
Humidity range -40℃~+85℃ -40℃~+85℃
External dimensions (mm) 71.8×36×51 83.4×48×63.5

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 STE1-X300 STE1-300 STE1-300D
Contact form 1H 1H 1H
Auxiliary contact / / 1NO
Contact polarity Non-polarity Having polarity Non-polarity
Contact resistance ≤0.5mΩ(at 300A) ≤0.2mΩ(at 300A) ≤0.3mΩ(at 300A)
Operating voltage ≤75%Un ≤75%Un ≤75%Un
Maximum breaking current 300A 300A 300A
Electrical endurance 10~1000V 10~1000V 10~1500V
Maximum breaking current 2000A(300VDC) 2500A(300VDC) 2000A(300VDC)
Electrical endurance ≥1×10³ times(300A/450VDC)
≥500 times(300A/750VDC)
≥100 times(300A/1000VDC)		 ≥6×10³ times(300A/750VDC)
≥3×10³ times(300A/1000VDC)		 ≥1.4×10³ times(250A/800VDC)
≥1×10³ times(400A/1000VDC)
≥500 times(400A/1500VDC)
Current carrying 300A:Continuous for
450A:5min 600A:2min		 300A:Continuous for
600A:1min 900A:10s		 400A:Continuous for
600A:1h 800A:10min
Dielectric withstand voltage Between open contacts 3000VAC 3000VAC 4000VAC
Between contact coils 3000VAC 4000VAC 4000VAC
Mechanical Endurance 2×10⁵ times 2×10⁵ times 2×10⁵ times
Coil Voltage 12V,24V 12V,24V 12V,24V
Coil power consumption 6W Connect 46W and maintain 4.5W 10W
Load extraction method Internal thread Copper bar connection Internal thread
Coil lead out method Connector Connector Connector
Weight About 370g About 850g About 700g
Vibrate 10Hz~500Hz 49m/s² 10Hz~500Hz 49m/s² 10Hz~500Hz 49m/s²
Humidity 5%~85%RH 5%~85%RH 5%~85%RH
Humidity range -40℃~+85℃ -40℃~+85℃ -40℃~+85℃
External dimensions (mm) 88.3×42.5×74.5 112.6×64.7×83.9 98.4×45×91.5

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 STE1-350 STE1-400 STE1-600
Contact form 1H 1H 1H
Auxiliary contact 1NO 1NO /
Contact polarity The coil has polarity while
the contacts have no polarity		 Non-polarity Having polarity
Contact resistance ≤0.3mΩ(at 350A) ≤0.2mΩ(at 400A) ≤0.2mΩ(at 600A)
Operating voltage ≤75%Un ≤75%Un ≤75%Un
Maximum breaking current 400A 400A 600A
Electrical endurance 10~1500V 10~1800V 10~1500V
Maximum breaking current 2000A(300VDC) 2500A(300VDC) 2500A(300VDC)
Electrical endurance ≥100 times(150A/1800VDC)
≥1×10³ times(400A/1000VDC)
≥500 times(400A/1500VDC)		 ≥100 times(150A/1800VDC)
≥1×10³ times(400A/1000VDC)
≥500 times(400A/1500VDC)		 ≥1×10³ times(600A/750VDC)
≥500 times(600A/1000VDC)
≥100 times(600A/1500VDC)
Current carrying 400A:Continuous for
450A:60min 600A:2min		 400A:Continuous for
450A:10min 600A:90s		 600A:Continuous for
800A:20min 1000A:5min
Dielectric withstand voltage Between open contacts 4000VAC 4000VAC 3000VAC
Between contact coils 4000VAC 4000VAC 4000VAC
Mechanical Endurance 2×10⁵ times 2×10⁵ times 2×10⁵ times
Coil Voltage 12V,24V 12V,24V 12V,24V
Coil power consumption Connect 46W and maintain 4.5W 10W Connect 50W and maintain 10W
Load extraction method Internal thread Internal thread Internal thread
Coil lead out method Connector Connector lead wire
Weight About 730g About 850g About 1020g
Vibrate 10Hz~500Hz 49m/s² 10Hz~500Hz 49m/s² 10Hz~500Hz 49m/s²
Humidity 5%~85%RH 5%~85%RH 5%~85%RH
Humidity range -40℃~+85℃ -40℃~+85℃ -40℃~+85℃
External dimensions (mm) 104×65×97.4 108×67×101.6 194.4×66.8×121.5

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

Automated Assembly Line

Testing Laboratory

Testing Laboratory

Injection & Stamping

Injection & Stamping

Quality Inspection

Quality Inspection

IEC Certification
CE Certification
CB Certification
RoHS Certification
ISO 14001 Certification

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

Coil Voltage

AC and DC coil voltage options tailored to application requirements.

Coil Voltage customization for AC and DC coil voltage options
Auxiliary Contacts

Auxiliary Contacts

Flexible auxiliary contact combinations for different control functions.

Auxiliary contacts customization for different control functions
Electrical Parameters

Electrical Parameters

Current ratings, protection ranges and functional parameters can be customized.

Electrical parameters customization for current ratings and protection ranges
Product Branding

Product Branding

Private label logos, nameplates and product identification support.

Product branding customization including private label logos and nameplates
Packaging Design

Packaging Design

Custom cartons, labels, manuals and packaging solutions.

Packaging design customization including cartons labels manuals and packaging solutions
Engineering Development

Engineering Development

Support from drawing optimization to product development and application matching.

Engineering development support from drawing optimization to product development

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STE Series High Voltage DC Contactor

Complete product overview for low-voltage electrical components and product selection reference.

 

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Contact Us

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.

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