Mfr Part #:

BF454

The STMicroelectronics BF454 is a Digital Voltage Sensitive Relay (DVSR) 2.0 designed for automatic battery bank management. It supports 12V and 24V systems with high current capacity.

✓ Total Stock: 5 pcs

$ Price Range: $0.99

BF454 Available from 1 distributor

✓ Authorised

✓ Non-Authorised

Distributor		Stock	Pricing	MOQ	PKG	Lead Time	Date Code	On Order Quantity	On Order Delivery
Partservice ✓ Non-Authorised Inventory information	5 pcs On Request	5 pcs	On Request	1	On Request	On Request	On Request	On Request	On Request

BF454 Specifications Quick View

Most important parameters for selection – full specs in datasheet.

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Category	New Products
Manufacturer Name	STMicroelectronics
Dimensions	69 mm x 69 mm
Mounting Type	Surface Mount, Panel Mount
Voltage Rating	12V

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BF454 Description

Short technical summary and product information.

The STMicroelectronics BF454 is an advanced, second-generation Digital Voltage Sensitive Relay (DVSR) 2.0. This automatic charging relay is designed to combine two battery banks when charging and separate them when not charging, protecting batteries from overcharging or depletion. It supports both DC 12V and DC 24V systems, offering a robust 140A intermittent and 125A continuous current capacity.

The DVSR 2.0 features Dual Port Sensing, allowing charging from either direction, such as from a starting engine or auxiliary power like solar panels. Its Easy-to-Configure wiring design simplifies installation with terminal blocks, reducing setup time and the risk of product damage. The relay offers versatile installation options, including surface and panel mounting, with dimensions optimized for seamless integration with other marine components.

Incorporating advanced digital circuit design, the BF454 automatically detects and adjusts to 12V or 24V systems. It includes delayed open and close timing (15-30 seconds) to prevent unwanted cycling due to voltage fluctuations. With ultra-low standby current consumption (0.3mA at 12V), it is an energy-efficient choice. The relay is housed in a durable glass fiber-reinforced nylon enclosure and boasts an IP67 waterproof rating, making it suitable for harsh environments. It meets ISO8846 and SAE J1171 ignition protection standards and is CE certified.

BF454 Quick Information

Product Type: Digital Voltage Sensitive Relay

Series: DVSR 2.0

Canonical Name: Digital Voltage Sensitive Relay

Subcategory: Digital Voltage Sensitive Relay

BF454 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

BF454 Estimated Pricing

Qty	Low	High
1+	$0.99	$0.99

Estimated market price range - modelled values for guidance only, not live distributor offers.

BF454 Features

Automatically combines and separates battery banks.
Supports 12V and 24V DC systems.
125A continuous and 140A intermittent current.
IP67 waterproof and ignition protected.
Low standby current consumption.

BF454 Applications

Ideal for dual battery systems.
Suitable for marine applications.
Use with solar or wind power.
Prevents battery depletion and dead batteries.
Ensures a charged battery is always available.

BF454 FAQs

7 frequently asked questions generated from this part’s specifications.

What is the voltage rating for the BF454 Digital Voltage Sensitive Relay?

The BF454 supports both DC 12V and DC 24V systems.

What is the continuous current rating of the BF454 DVSR?

The BF454 has a continuous current capacity of 125A.

What is the intermittent current rating for the BF454 relay?

The BF454 offers an intermittent current capacity of 140A.

What is the standby current consumption of the BF454 at 12V?

The BF454 has an ultra-low standby current consumption of 0.3mA at 12V.

What is the delay timing for the BF454's circuit switching?

The BF454 features a delay of 15-30 seconds for circuit opening and closing.

What are the dimensions of the BF454 Digital Voltage Sensitive Relay?

The dimensions of the BF454 are 69 mm x 69 mm.

Is the BF454 waterproof and ignition protected?

Yes, the BF454 is IP67 waterproof and meets ISO8846 and SAE J1171 ignition protection standards.