Cembre 2051630 RF-BF4 pre-insulated female socket terminal for 0.25-1.5 mm² conductors with a 4 mm socket connection and halogen-free polycarbonate insulation.
£0.20
The Cembre 2051630 RF-BF4 is a high-quality pre-insulated female socket terminal designed to provide secure, dependable electrical connections in industrial control panels, machinery, OEM equipment and commercial electrical installations. Manufactured by Cembre, this professional-grade terminal combines excellent electrical performance with long-term mechanical reliability for demanding applications.
Manufactured from tin-plated brass with durable halogen-free polycarbonate insulation, the RF-BF4 offers excellent corrosion resistance, high dielectric strength and UL94 V0 flame-retardant performance. The easy-entry design simplifies installation while ensuring consistently reliable crimp connections.
Designed for 0.25–1.5 mm² conductors, this pre-insulated female socket terminal features a 4 mm socket connection, making it ideal for industrial automation, control cabinets, HVAC equipment, lighting systems and electrical maintenance where reliable wire termination is essential.
Pre-insulated socket terminals provide secure, vibration-resistant electrical connections while helping to protect against accidental contact. Their robust construction ensures dependable long-term performance in demanding industrial environments.
The Cembre RF-BF4 has been developed for professional electricians, panel builders and OEM manufacturers requiring reliable, standards-compliant electrical terminations for modern automation and machinery installations.
| Series | RF-BF Socket Terminals |
|---|---|
| Part Number | 2051630 |
| Product Type | Pre-insulated female socket terminal |
| Connection Type | Female socket terminal |
| Socket Size | 4 mm |
| Conductor Size | 0.25–1.5 mm² |
| Conductor Material | Tin-plated brass |
| Insulation Material | Polycarbonate (PC) |
| Insulation Colour | Red |
| Halogen Free | Yes |
| Flammability Rating | UL94 V0 |
| Operating Temperature | -20°C to +115°C (130°C short-term) |
| Cable Stripping Length | 5.2 mm |
| Pack Quantity | 100 |
| HS Code | 85366990 |
| Country of Manufacture | Italy |
It is a pre-insulated female socket terminal designed for secure electrical connections in industrial and commercial wiring applications.
The RF-BF4 accepts stranded conductors from 0.25 mm² to 1.5 mm².
It features a standard 4 mm female socket connection.
Yes. It features low smoke zero halogen (LSZH) polycarbonate insulation with a UL94 V0 flame-retardant rating.
It is widely used in industrial automation, control panels, machinery, HVAC equipment and OEM electrical assemblies.
Cembre insulated terminals are trusted by industrial electricians, panel builders and OEM manufacturers worldwide for delivering safe, durable and dependable electrical connections in demanding applications.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...