Diaphragm pressure switch LF727

SPDTbare wiresbrass

Overview
The LF727 is a diaphragm-type pressure switch designed for industrial and automotive applications. It detects when system pressure reaches a preset value and sends an electrical signal to control mechanical equipment or trigger alarms. SPDT output; burst pressure up to 300 bar depending on body material.

Parameters
Body material: Zinc plated steel / Stainless steel / Brass
Contact: Silver‑cadmium alloy
Max voltage: 250 VAC / 42 VDC
Max current: 4 A
Operating temperature range: -40 °C to +100 °C (depending on diaphragm)
Mechanical life: 1×10^6 cycles
Electrical life: 1×10^5 cycles
Pollution degree: Normal
Repeatability: ±2%
IP grade: Wire leads IP00, Hirschmann IP65, Resined wires IP67
Applicable standard: EN 60730-1
Max working pressure: Zinc plated steel / Stainless steel: 150 bar; Brass: 40 bar
Burst pressure: Zinc plated steel / Stainless steel: 300 bar; Brass: 80 bar
Weight: approx. 140 g

Dimension
Refer to product dimension images for detailed mechanical drawings and mounting dimensions.

Documents & Drawings
Product PDF datasheet available: Diaphragm Pressure Switch LF727 (PDF datasheet).

Features / Technical specifications

• Model: LF727
• Type: Diaphragm pressure switch
• Output: SPDT
• Body materials: Zinc plated steel, Stainless steel, Brass
• Contact material: Silver‑cadmium alloy
• Electrical ratings: Up to 250 VAC / 42 VDC; Max current 4 A
• Operating temperature: -40 °C to +100 °C (varies with diaphragm)
• Mechanical life: 1,000,000 cycles
• Electrical life: 100,000 cycles
• Repeatability: ±2%
• IP options: IP00 (wire leads), IP65 (Hirschmann), IP67 (resined wires)
• Standards: EN 60730-1
• Max working / burst pressures by material as listed above
• Weight: ~140 g