Relay Switch Controller DC 6~80V Voltage Detection Charging Discharge Monitor with Case Digital display DC voltage detection
SPECIFICATIONS
Brand Name: NONE
Choice: yes
High-concerned chemical: none
Origin: Mainland China
Power Source: DC
Theory: Voltage relay
Use: Protective
Voltage: 6-8V
is_customized: no

Model: A30-U1
Features:
Digital display DC voltage detection, control the relay output.
DC 6~80V relay interface board with 2 buttons for easy operation.
With clear LED display, convenient to check the value.
Adjustable Voltage Detection Range: DC 0~99.9V.
When the measured voltage is lower than the lower limit or higher than upper limit value, the relay works.
Can be used for voltage detection switch, battery over/under voltage protector or discharge meter.
Comes with a cover for protection.
Specifications:
Material: PCB + ABS
Working Voltage: DC 6~80V
Voltage Detection Range: DC 0~99.9V
Error: +/-0.1V
Working Current: 8mA/24V(relay open, LED displays OFF about 4mA/24V); 58mA/24V(relay closed)
A set of transformations(normally open/normally close, NO/NC)
Contact Load: NO: 30A/250V AC or 30A/30V DC; NC :20A/250V AC or 20A/30V DC
Attention: Because high voltage DC electric arc damages relay contact,
so the electric load above DC60V load current is less than 10A.
Contact Resistance: ≤100mΩ(1A 6VDC)
Mechanical Durability: 10 millions Electricity durability: >100,000 (20A~250VAC)
Operating Temperature: -40~85°C
Item Size: 9.4 * 5.2 * 3cm / 3.7 * 2.05 * 1.18in
Package Size: 9.5 * 6 * 3cm / 3.74 * 2.36 * 1.18in
Package Weight: 85g / 3oz
Package List:
1 * Relay Switch Controller











Model: A30-U3
Features:
Operating power is DC 6 to 80V, contact load is 30A, 250V AC or 30V DC. High quality voltage monitoring relay is durable, and features fast reaction times, making it more efficient.
Supports on delay and off delay mode, the delay time can be adjusted from 0s to 999s.
Provides 4 operating modes: P-1, relay close delay time and display off setting; P-2, voltage control timer A (delay on); P-3, voltage control timer B (delay off); and P-4, voltage range control.
It has a voltage detection channel, a set of relay switch output(normally open and normally close), the time relay can be controlled by voltage detection to achieve a variety of functions.
Can be used in voltage monitoring, charging and discharging control, overvoltage and undervoltage protection and other fields.
Parameters:
A Set of Conversion: normally open and normally close
Contact Load:
NO: 30A/250V AC or 30A/30V DC
NC: 20A/250V AC or 20A/30V DC
*Attention: because high voltage DC electric arc damages relay contact, so the electric load above DC 60V load current is less than 10A.
Contact Resistance: ≤ 100mΩ (1A, 6V DC)
Mechanical Durability: 10 millions
Electricity Durability: > 100,000 (10A to 250V AC)
Set display off, the minimum current value is 4mA/24V(relay open).
The settings automatically saves after power off.
Specifications:
Material: ABS
Color: Blue
Output Timer Range: 0 to 999 seconds (when the voltage reaches the set value, relay will delay to open or close)
Detection Samping Delay: 0.1 to 0.9 seconds (detection sensitivity)
Voltage Detect Range: DC 0 to 99.9V, error: ±0.1V
Voltage Upper and Lower Limit Adjustable: DC 0 to 99.9V
Operating Power: DC 6 to 80V (60V battery at maximum)
Item Size: 9.4*5.2*3cm / 3.7*2.04*1.18in
Package Size: 9.5*6*3cm / 3.74*2.36*1.18in
Package Weight: 92g / 3.24oz
Packing List:
1 * Voltage Relay
1 * User Manual(English)













Many Questions about Dropshipping Services Are As Follows:
1.How many orders can you handle per day?
we are a large company in Shenzhen,China,with a large warehouse that can handle large orders everyday.We send out countless parcels everyday.We can guarantee the order you request.
2.How fast can you process orders?
We will arrange shipment as soon as possible after you pay the order.Priority delivery for dropshipping order
3.Could you ship order without any receipts,invoices and promotional offer inside the package?
Absolutely!No invoices,receipts,promotional offer if you leave notes on the order(if you want,we can provide.)
4.If you need other products?
We can provide most products you need as much as possible1
If you have any other questions,please feel free to contact us.
We are very grateful to cooperate with you.
5.We can support CSV/Excel File Dropshipping.
6.There is no limited stock to fulfill the orders on a daily basis





Model: A30-U1
Features:
Digital display DC voltage detection, control the relay output.
DC 6~80V relay interface board with 2 buttons for easy operation.
With clear LED display, convenient to check the value.
Adjustable Voltage Detection Range: DC 0~99.9V.
When the measured voltage is lower than the lower limit or higher than upper limit value, the relay works.
Can be used for voltage detection switch, battery over/under voltage protector or discharge meter.
Comes with a cover for protection.
Specifications:
Material: PCB + ABS
Working Voltage: DC 6~80V
Voltage Detection Range: DC 0~99.9V
Error: +/-0.1V
Working Current: 8mA/24V(relay open, LED displays OFF about 4mA/24V); 58mA/24V(relay closed)
A set of transformations(normally open/normally close, NO/NC)
Contact Load: NO: 30A/250V AC or 30A/30V DC; NC :20A/250V AC or 20A/30V DC
Attention: Because high voltage DC electric arc damages relay contact,
so the electric load above DC60V load current is less than 10A.
Contact Resistance: ≤100mΩ(1A 6VDC)
Mechanical Durability: 10 millions Electricity durability: >100,000 (20A~250VAC)
Operating Temperature: -40~85°C
Item Size: 9.4 * 5.2 * 3cm / 3.7 * 2.05 * 1.18in
Package Size: 9.5 * 6 * 3cm / 3.74 * 2.36 * 1.18in
Package Weight: 85g / 3oz
Package List:
1 * Relay Switch Controller











Model: A30-U3
Features:
Operating power is DC 6 to 80V, contact load is 30A, 250V AC or 30V DC. High quality voltage monitoring relay is durable, and features fast reaction times, making it more efficient.
Supports on delay and off delay mode, the delay time can be adjusted from 0s to 999s.
Provides 4 operating modes: P-1, relay close delay time and display off setting; P-2, voltage control timer A (delay on); P-3, voltage control timer B (delay off); and P-4, voltage range control.
It has a voltage detection channel, a set of relay switch output(normally open and normally close), the time relay can be controlled by voltage detection to achieve a variety of functions.
Can be used in voltage monitoring, charging and discharging control, overvoltage and undervoltage protection and other fields.
Parameters:
A Set of Conversion: normally open and normally close
Contact Load:
NO: 30A/250V AC or 30A/30V DC
NC: 20A/250V AC or 20A/30V DC
*Attention: because high voltage DC electric arc damages relay contact, so the electric load above DC 60V load current is less than 10A.
Contact Resistance: ≤ 100mΩ (1A, 6V DC)
Mechanical Durability: 10 millions
Electricity Durability: > 100,000 (10A to 250V AC)
Set display off, the minimum current value is 4mA/24V(relay open).
The settings automatically saves after power off.
Specifications:
Material: ABS
Color: Blue
Output Timer Range: 0 to 999 seconds (when the voltage reaches the set value, relay will delay to open or close)
Detection Samping Delay: 0.1 to 0.9 seconds (detection sensitivity)
Voltage Detect Range: DC 0 to 99.9V, error: ±0.1V
Voltage Upper and Lower Limit Adjustable: DC 0 to 99.9V
Operating Power: DC 6 to 80V (60V battery at maximum)
Item Size: 9.4*5.2*3cm / 3.7*2.04*1.18in
Package Size: 9.5*6*3cm / 3.74*2.36*1.18in
Package Weight: 92g / 3.24oz
Packing List:
1 * Voltage Relay
1 * User Manual(English)













Many Questions about Dropshipping Services Are As Follows:
1.How many orders can you handle per day?
we are a large company in Shenzhen,China,with a large warehouse that can handle large orders everyday.We send out countless parcels everyday.We can guarantee the order you request.
2.How fast can you process orders?
We will arrange shipment as soon as possible after you pay the order.Priority delivery for dropshipping order
3.Could you ship order without any receipts,invoices and promotional offer inside the package?
Absolutely!No invoices,receipts,promotional offer if you leave notes on the order(if you want,we can provide.)
4.If you need other products?
We can provide most products you need as much as possible1
If you have any other questions,please feel free to contact us.
We are very grateful to cooperate with you.
5.We can support CSV/Excel File Dropshipping.
6.There is no limited stock to fulfill the orders on a daily basis





Model: A30-U1
Features:
Digital display DC voltage detection, control the relay output.
DC 6~80V relay interface board with 2 buttons for easy operation.
With clear LED display, convenient to check the value.
Adjustable Voltage Detection Range: DC 0~99.9V.
When the measured voltage is lower than the lower limit or higher than upper limit value, the relay works.
Can be used for voltage detection switch, battery over/under voltage protector or discharge meter.
Comes with a cover for protection.
Specifications:
Material: PCB + ABS
Working Voltage: DC 6~80V
Voltage Detection Range: DC 0~99.9V
Error: +/-0.1V
Working Current: 8mA/24V(relay open, LED displays OFF about 4mA/24V); 58mA/24V(relay closed)
A set of transformations(normally open/normally close, NO/NC)
Contact Load: NO: 30A/250V AC or 30A/30V DC; NC :20A/250V AC or 20A/30V DC
Attention: Because high voltage DC electric arc damages relay contact,
so the electric load above DC60V load current is less than 10A.
Contact Resistance: ≤100mΩ(1A 6VDC)
Mechanical Durability: 10 millions Electricity durability: >100,000 (20A~250VAC)
Operating Temperature: -40~85°C
Item Size: 9.4 * 5.2 * 3cm / 3.7 * 2.05 * 1.18in
Package Size: 9.5 * 6 * 3cm / 3.74 * 2.36 * 1.18in
Package Weight: 85g / 3oz
Package List:
1 * Relay Switch Controller











Model: A30-U3
Features:
Operating power is DC 6 to 80V, contact load is 30A, 250V AC or 30V DC. High quality voltage monitoring relay is durable, and features fast reaction times, making it more efficient.
Supports on delay and off delay mode, the delay time can be adjusted from 0s to 999s.
Provides 4 operating modes: P-1, relay close delay time and display off setting; P-2, voltage control timer A (delay on); P-3, voltage control timer B (delay off); and P-4, voltage range control.
It has a voltage detection channel, a set of relay switch output(normally open and normally close), the time relay can be controlled by voltage detection to achieve a variety of functions.
Can be used in voltage monitoring, charging and discharging control, overvoltage and undervoltage protection and other fields.
Parameters:
A Set of Conversion: normally open and normally close
Contact Load:
NO: 30A/250V AC or 30A/30V DC
NC: 20A/250V AC or 20A/30V DC
*Attention: because high voltage DC electric arc damages relay contact, so the electric load above DC 60V load current is less than 10A.
Contact Resistance: ≤ 100mΩ (1A, 6V DC)
Mechanical Durability: 10 millions
Electricity Durability: > 100,000 (10A to 250V AC)
Set display off, the minimum current value is 4mA/24V(relay open).
The settings automatically saves after power off.
Specifications:
Material: ABS
Color: Blue
Output Timer Range: 0 to 999 seconds (when the voltage reaches the set value, relay will delay to open or close)
Detection Samping Delay: 0.1 to 0.9 seconds (detection sensitivity)
Voltage Detect Range: DC 0 to 99.9V, error: ±0.1V
Voltage Upper and Lower Limit Adjustable: DC 0 to 99.9V
Operating Power: DC 6 to 80V (60V battery at maximum)
Item Size: 9.4*5.2*3cm / 3.7*2.04*1.18in
Package Size: 9.5*6*3cm / 3.74*2.36*1.18in
Package Weight: 92g / 3.24oz
Packing List:
1 * Voltage Relay
1 * User Manual(English)













Many Questions about Dropshipping Services Are As Follows:
1.How many orders can you handle per day?
we are a large company in Shenzhen,China,with a large warehouse that can handle large orders everyday.We send out countless parcels everyday.We can guarantee the order you request.
2.How fast can you process orders?
We will arrange shipment as soon as possible after you pay the order.Priority delivery for dropshipping order
3.Could you ship order without any receipts,invoices and promotional offer inside the package?
Absolutely!No invoices,receipts,promotional offer if you leave notes on the order(if you want,we can provide.)
4.If you need other products?
We can provide most products you need as much as possible1
If you have any other questions,please feel free to contact us.
We are very grateful to cooperate with you.
5.We can support CSV/Excel File Dropshipping.
6.There is no limited stock to fulfill the orders on a daily basis





Model: A30-U1
Features:
Digital display DC voltage detection, control the relay output.
DC 6~80V relay interface board with 2 buttons for easy operation.
With clear LED display, convenient to check the value.
Adjustable Voltage Detection Range: DC 0~99.9V.
When the measured voltage is lower than the lower limit or higher than upper limit value, the relay works.
Can be used for voltage detection switch, battery over/under voltage protector or discharge meter.
Comes with a cover for protection.
Specifications:
Material: PCB + ABS
Working Voltage: DC 6~80V
Voltage Detection Range: DC 0~99.9V
Error: +/-0.1V
Working Current: 8mA/24V(relay open, LED displays OFF about 4mA/24V); 58mA/24V(relay closed)
A set of transformations(normally open/normally close, NO/NC)
Contact Load: NO: 30A/250V AC or 30A/30V DC; NC :20A/250V AC or 20A/30V DC
Attention: Because high voltage DC electric arc damages relay contact,
so the electric load above DC60V load current is less than 10A.
Contact Resistance: ≤100mΩ(1A 6VDC)
Mechanical Durability: 10 millions Electricity durability: >100,000 (20A~250VAC)
Operating Temperature: -40~85°C
Item Size: 9.4 * 5.2 * 3cm / 3.7 * 2.05 * 1.18in
Package Size: 9.5 * 6 * 3cm / 3.74 * 2.36 * 1.18in
Package Weight: 85g / 3oz
Package List:
1 * Relay Switch Controller











Model: A30-U3
Features:
Operating power is DC 6 to 80V, contact load is 30A, 250V AC or 30V DC. High quality voltage monitoring relay is durable, and features fast reaction times, making it more efficient.
Supports on delay and off delay mode, the delay time can be adjusted from 0s to 999s.
Provides 4 operating modes: P-1, relay close delay time and display off setting; P-2, voltage control timer A (delay on); P-3, voltage control timer B (delay off); and P-4, voltage range control.
It has a voltage detection channel, a set of relay switch output(normally open and normally close), the time relay can be controlled by voltage detection to achieve a variety of functions.
Can be used in voltage monitoring, charging and discharging control, overvoltage and undervoltage protection and other fields.
Parameters:
A Set of Conversion: normally open and normally close
Contact Load:
NO: 30A/250V AC or 30A/30V DC
NC: 20A/250V AC or 20A/30V DC
*Attention: because high voltage DC electric arc damages relay contact, so the electric load above DC 60V load current is less than 10A.
Contact Resistance: ≤ 100mΩ (1A, 6V DC)
Mechanical Durability: 10 millions
Electricity Durability: > 100,000 (10A to 250V AC)
Set display off, the minimum current value is 4mA/24V(relay open).
The settings automatically saves after power off.
Specifications:
Material: ABS
Color: Blue
Output Timer Range: 0 to 999 seconds (when the voltage reaches the set value, relay will delay to open or close)
Detection Samping Delay: 0.1 to 0.9 seconds (detection sensitivity)
Voltage Detect Range: DC 0 to 99.9V, error: ±0.1V
Voltage Upper and Lower Limit Adjustable: DC 0 to 99.9V
Operating Power: DC 6 to 80V (60V battery at maximum)
Item Size: 9.4*5.2*3cm / 3.7*2.04*1.18in
Package Size: 9.5*6*3cm / 3.74*2.36*1.18in
Package Weight: 92g / 3.24oz
Packing List:
1 * Voltage Relay
1 * User Manual(English)













Many Questions about Dropshipping Services Are As Follows:
1.How many orders can you handle per day?
we are a large company in Shenzhen,China,with a large warehouse that can handle large orders everyday.We send out countless parcels everyday.We can guarantee the order you request.
2.How fast can you process orders?
We will arrange shipment as soon as possible after you pay the order.Priority delivery for dropshipping order
3.Could you ship order without any receipts,invoices and promotional offer inside the package?
Absolutely!No invoices,receipts,promotional offer if you leave notes on the order(if you want,we can provide.)
4.If you need other products?
We can provide most products you need as much as possible1
If you have any other questions,please feel free to contact us.
We are very grateful to cooperate with you.
5.We can support CSV/Excel File Dropshipping.
6.There is no limited stock to fulfill the orders on a daily basis





- Standard Shipping: Standard Shipping (12–18 Business Days)
- Express Shipping: Expedited Shipping (5–9 Business Days)
- Free Shipping: Orders over $199 qualify automatically
- Tracking: Full tracking number provided for all orders
- Returns: 30-day hassle-free return window
- Condition: Items must be unused and in original packaging
- Refund: Full refund processed within 3-5 business days
- Factory Direct: ISO/TS 16949 certified manufacturer
- Quality: 100% electrical continuity tested before shipment
- Experience: 15+ years in automotive connector industry
- Support: Professional technical support available
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