PIONEER MAGNETICS 24F33-0-4-R-S

Product Name: Pioneer Magnetics 24F33-0-4-R-S — Toroidal Power Transformer

Product Overview: Single-phase toroidal isolation transformer manufactured by Pioneer Magnetics (now part of MPS Industries / Bel Fuse group). Used in audio, medical, and industrial equipment.

Category:
Description

Technical Specifications:

Parameter Value
Primary Voltage 120V AC (or 240V depending on config)
Secondary Voltage 24V AC (dual secondary implied by 0-4)
VA Rating 33 VA
Frequency 50/60 Hz
Configuration Dual secondary (0-4 = center-tapped or dual 24V)
Encapsulation R = Rubber encapsulated (vacuum potted)
Mounting S = Screw-mount (flange with mounting holes)
Insulation Class Class B (130°C)
Core Material Grain-oriented silicon steel (M6 grade)
Winding Material Copper (Class H enamel)
Efficiency >95% at full load
Temperature Rise <55°C at rated load

Functional Features:

  • Toroidal core geometry — minimal magnetic flux leakage, low EMI emission
  • Rubber encapsulation (R) — vibration dampening, moisture resistance, acoustic noise reduction
  • Screw-mount (S) — secure panel or chassis installation
  • Dual secondary windings — provides two isolated 24V outputs or center-tapped configuration

Performance Parameters:

Metric Value
Regulation <3% (typical)
No-Load Current <10 mA
Short-Circuit Withstand 10x rated current for 2 sec
Dielectric Strength 2500V AC (primary to secondary, 1 min)
Insulation Resistance >100 MΩ at 500V DC

Applicable Industries: Audio amplifiers, medical instruments, CNC controls, security systems, test equipment, LED drivers.

Installation Requirements:

  • Mount using provided screws into chassis (min M4 holes)
  • Maintain 25mm clearance from heat sources
  • Do not exceed VA rating on any secondary
  • Ground the transformer case if used in medical applications (per IEC 60601)

Usage Notes:

  • “0-4” indicates center-tapped or dual secondary — verify wiring per schematic
  • Rubber encapsulation makes this unit suitable for vibration-heavy environments
  • Do not operate in enclosed spaces without ventilation
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