HIMA H4133 (SIL3 Safety Isolation Relay, DIN Rail Type)

H4133 is a SIL3 safety isolation relay (terminal box type) from German HIMA (HIMA brand). It belongs to the signal isolation / load switching module of the H41q system, used for electrical isolation between safety circuits and external systems, suitable for regular non-explosion-proof areas.

1. Basic Information

Model: H4133 (H 4133)

Brand: HIMA (German HIMA)

Type: Safety Isolation Relay (Single Channel, Sealed Contacts)

Safety Level: SIL3 (IEC 61508), Cat.4 (EN 954), PL e (ISO 13849)

Installation: 35mm DIN Rail (Compatible with DIN 46277 Standard Rail)

Weight: Approximately 0.35kg

Status: In Service, Commonly Used Module of H41q System

II. Core Parameters

Input Voltage: 24VDC (-15% to +20%)

Operating Current: 27mA (rpp < 15%)

Output Contacts: 1 passive conversion contact (sealed type)

Isolation Level: Safety Isolation (DIN VDE 0106 Part 101), Overvoltage Level III (300V)

Switching Voltage: 1mV to 250VAC/DC

Switching Current: 1mA to 5A (higher than 4A of H4116)

Action Time: Approximately 8ms; Reset Time: Approximately 14ms

Mechanical Life: ≥10⁷ times; Electrical Life: ≥3×10⁵ times (full load)

Operating Temperature: -25℃ to +50℃

Protection Level: IP20

III. Key Functional Features

SIL3 Safety Isolation: Safe isolation between contacts and input, preventing external voltage interference, suitable for ESD/F&G safety circuits.

Reverse Polarity Protection: Integrated anti-reverse connection circuit, the relay does not act when the voltage polarity is incorrect, protecting the equipment.

Status Indication: With LED indicator light, real-time display of coil energized state, facilitating on-site troubleshooting.

High Load Capacity: 5A contact current, can directly drive solenoids, contactors, indicator lights, etc., for high-power loads.

Compact and Easy Installation: Rail-mounted installation, terminals can rotate to adapt to the on-site wiring direction, suitable for harsh industrial environments.

IV. H4133 vs H4116/H4012 (Core Differences) Table

Model Core Function Contact Capacity Isolation Feature Applicable Scenarios

H4133 Safety Isolation Relay 5A (Maximum) Conventional Isolation Non-explosion-proof area, high-load switching

H4116 Safety Isolation Relay 4A Conventional Isolation Non-explosion-proof area, standard load

H4012 Explosion-proof Safety Amplifier 0.5A Explosion-proof Isolation Explosion-proof area, low-power explosion-proof circuit

V. Typical Applications

Petrochemical / Power / Metallurgy conventional areas for SIS safety loop signal isolation

Electrical isolation of safety loops and DCS/PLC/third-party systems

Direct drive of solenoid valves, contactors, motor starters, etc. with loads up to 5A

Combined with H41q system CPU (such as H4122, F8652X) to build SIL3 safety system