Phoenix RIF Series Relay Selection Guide: Precise Part Number & Model Matching

Opening: Reliable Industrial Relay Solutions for Signal Switching & Surge Protection

In industrial automation control systems, relays with stable switching performance, surge protection, and multi-voltage adaptation are critical for circuit interlocking, signal amplification, and load control. The Phoenix RIF-1-RPT series stands out with dual functional variants (standard LV/ surge-protected LDP), wide AC/DC voltage compatibility (24V/120V/230V), and flexible contact configurations, widely used in motor control, sensor-triggered circuits, and safety interlock systems. This guide integrates part number-model correspondence, core technical parameters, and scenario-specific recommendations to simplify selection and procurement, helping you quickly lock in optimal relay solutions.

I. Core Advantages: Why Choose the Phoenix RIF Series?

• Dual functional variants:
  • LV (Standard type): Basic switching for general industrial scenarios;
  • LDP (Surge protection type): Built-in surge suppression for inductive loads (motors, solenoids), extending relay life.
• Wide voltage compatibility: Supports 24AC/230AC/120AC (AC systems) and 24DC (DC automation systems), adapting to global industrial power standards.
• Flexible contact configurations: Dual changeover contacts (2X21), single changeover contact (1X21), special normally open contacts (1X21AU), and integrated contacts (1IC), meeting diverse circuit needs.
• Industrial-grade reliability: Operating temperature range of -25°C to +60°C, anti-vibration design (IEC 60068-2-6), suitable for harsh factory environments.
• Special function integration: Ground terminal (FG) for safety interlocks, MS-type special contacts for custom circuits, ensuring system safety and flexibility.

II. Complete Product Series Selection Table (Part Number + Model + Core Information)

1. RIF-1-RPT-LV Series: Standard Type Relays (No Surge Protection)

Designed for general industrial switching scenarios (non-inductive loads, low surge risk).

2. RIF-1-RPT-LDP Series: Surge Protection Relays (Built-in LDP Circuit)

Equipped with surge suppression for inductive loads (motors, solenoids), suitable for harsh environments with voltage spikes.

III. RIF Series Nomenclature Explanation (Key to Model Understanding)

RIF-1-RPT-[Suffix1]-[Voltage]/[Contact Configuration]-[Special Feature]

• Suffix1 (Function Type): LV = Standard type (no surge protection); LDP = Surge protection type (for inductive loads).
• Voltage: 24AC/230AC/120AC (AC control) | 24DC (DC control).
• Contact Configuration:
  • 2X21 = 2× changeover contacts (1NO + 1NC per contact);
  • 1X21 = 1× changeover contact;
  • 1X21AU = 1× special normally open contact (enhanced load capacity);
  • 1IC = 1× integrated contact (compact design);
  • MS = Special function contact (custom circuit adaptation).
• Special Feature: FG = Ground terminal (safety interlock); no suffix = standard design.

IV. 3-Step Quick Selection Technique (Easy for Beginners)

Step 1: Select Function Type (LV/LDP)

• General loads (resistive, no surge): Standard type (LV) → 2903333, 2903331.
• Inductive loads (motors, solenoids, voltage spikes): Surge protection type (LDP) → 2903334, 2908215.

Step 2: Confirm Control Voltage

• Automation systems (global standard): 24DC/24AC → 2903334 (24DC LDP), 2903333 (24AC LV).
• Mains power (Europe/Asia): 230AC → 2903331 (LV), 2903330 (LDP).
• North American market: 120AC → 2903332 (LV), 2909776 (LV MS).

Step 3: Choose Contact Configuration & Special Features

• Dual-circuit switching: 2X21/2X21AU → 2903333 (2X21), 2903330 (2X21AU).
• Single-circuit switching: 1X21/1X21AU → 2903341 (1X21), 2903338 (1X21AU).
• Safety interlock: FG suffix (ground protection) → 2908215.
• Compact design: 1IC (integrated contact) → 2909884.
• Custom circuits: MS suffix (special contact) → 2905292, 2905291.

V. Recommended Industry-Scenario Combinations (Ready-to-Use)

VI. Selection Pitfall Avoidance Guide (Common Mistakes to Note)

1. Surge protection neglect: Inductive loads (motors/solenoids) using LV models → Select LDP suffix (2903334) to suppress voltage spikes and avoid relay damage.
2. Voltage mismatch: 24DC system using AC models (e.g., 230AC) → Confirm voltage in model (AC/DC) to prevent burnout.
3. Contact configuration error: Dual-circuit needs using single-circuit relays → Choose 2X21 (dual changeover) for multi-circuit switching.
4. Safety interlock missing: Emergency stop circuits without FG models → Select FG suffix (2908215) for ground protection, complying with safety standards.
5. North American market incompatibility: Using 230AC models for 120AC systems → Choose 120AC-specific models (2903332, 2909776).
6. Special load mismatch: High-reliability loads using standard contacts → Select 21AU (special 常开) or MS (special function) models for enhanced performance.

Conclusion: Select the Right RIF Relay for Stable Industrial Control

The Phoenix RIF-1-RPT series provides targeted solutions for general switching and inductive load protection, with LV/LDP dual variants, multi-voltage compatibility, and flexible contact configurations adapting to global industrial scenarios.