In most procurement cycles, RIF-0-BSC-21 is considered with SMPS Phoenix, Phoenix Contact Relay Socket and Phoenixcontact Phoenix Contact Logic Modules Supply, giving decision-makers confidence that they’ve chosen the most dependable component.
Phoenix RIF-0-BSC/21 Relay Socket
The Phoenix RIF-0-BSC/21 Relay Socket (Part No: 2900957 ) offers a Screw connection method, 0.5 mm² ... 4 mm² conductor cross section rigid, 0.5 mm² ... 2.5 mm² conductor cross section flexible, DIN rail mounting mounting type. Manufactured by Phoenix under the Phoenix Relay Socket category, this model belongs to the Phoenix PLC Series.

| Brand | Phoenix Contact |
| Product Type | Relay Socket |
| Model Number | RIF-0-BSC/21 |
Phoenix RIF-0-BSC/21 Relay Socket – Technical Specifications
| Specification | Value |
|---|---|
| Product type | Relay socket |
| Product family | RIFLINE complete |
| Nominal voltage UN | 250 V AC/DC (Contact side) |
| Nominal current IN | max. 8 A (Depends on application/assembly) |
| Connection method | Screw connection |
| Stripping length | 7 mm |
| Conductor cross section rigid | 0.5 mm² ... 4 mm² |
| Conductor cross section flexible | 0.5 mm² ... 2.5 mm² |
| Width | 6.2 mm |
| Height | 84 mm |
| Color | gray (RAL 7042) |
| Ambient temperature (operation) | -40 °C ... 85 °C (Depends on application/assembly) |
| Ambient temperature (storage/transport) | -40 °C ... 85 °C |
| Mounting type | DIN rail mounting |
| Mounting position | any |
| Protective circuit | Freewheeling diode |
| Conductor cross section AWG | 20 ... 12 (solid) |
| Tightening torque | 0.5 Nm ... 0.6 Nm |
| Depth | 82 mm |
| Flammability rating according to UL 94 | V2 (Housing) |
The Phoenix RIF-0-BSC/21 is a precision-engineered Relay Socket built for dependable relay operation in compact control panels. It supports a nominal voltage of 250 V AC/DC on the contact side and is rated for up to 8 A, making it suitable for various mid-load switching needs. The socket employs a high-integrity screw connection system, accepting both rigid conductors from 0.5 mm² to 4 mm² and flexible conductors from 0.5 mm² to 2.5 mm², with support for AWG 20 to 12. Its compact form factor — just 6.2 mm wide and 84 mm high — is ideal for dense DIN rail configurations. Built with a gray UL 94 V2 flame-retardant housing, the unit maintains operational reliability across extreme temperature ranges of -40 °C to +85 °C. It integrates a freewheeling diode as a protective circuit, enhancing component lifespan and noise suppression. The DIN rail mounting and any-orientation installation make it a plug-and-play choice for fast-paced industrial setups. Every specification in the RIF-0-BSC/21 reflects Phoenix Contact’s commitment to safety, precision, and high performance in automation environments.
This model is widely used in compact relay switching scenarios, especially in PLC-based automation panels where every millimeter counts. Senior maintenance engineers prefer the RIF-0 Relay Socket for its reliable thermal performance and consistent screw terminal grip, ensuring solid electrical contact in high-vibration environments. Junior engineers and students appreciate it as an accessible example of relay base implementation in space-restricted layouts. It's a go-to component for panel builders designing distributed I/O cabinets, temperature control panels, and logic circuits that demand slim-profile relay sockets. Its integrated freewheeling diode helps protect sensitive relay coils from voltage spikes, which is critical when switching inductive loads like small solenoids or contactors. With proven quality from Phoenix Contact, this relay base offers long-term stability and electrical safety in demanding field conditions.
View more compact relay socket options in the Phoenix Relay Socket category. To explore more innovations from the brand, visit the Phoenix Contact official brand page on IndMALL.







