Genuine Motorola UMT1NFTN Dual Bridge Rectifier for Power Supply Applications
The Motorola 4815267H01 is a high-performance UMT1NFTN dual bridge rectifier designed for professional repair and maintenance of Motorola radio equipment. This genuine OEM component provides efficient AC-to-DC conversion and rectification in power supply circuits. The compact surface-mount package with dual bridge configuration offers versatile power conversion capabilities in a space-efficient design.
Key Features
- Genuine Motorola factory replacement part - ensures reliable power conversion
- UMT1NFTN designation for dual bridge rectifier configuration
- Six-pin SOT-363 (SC-70-6) surface-mount package
- Dual bridge configuration for versatile rectification applications
- Low forward voltage drop for efficient power conversion
- Fast recovery time for high-frequency applications
- Compact design suitable for space-constrained power supply circuits
Compatible Models
- Various Motorola commercial and professional two-way radio models
- Used in power supply rectification, DC voltage generation, and power conversion circuits
- Consult your radio's service manual or schematic diagram for exact component location
What's Included
- One (1) Motorola UMT1NFTN dual bridge rectifier
Application and Installation
Professional Installation Required: This surface-mount dual bridge rectifier requires specialized soldering equipment and proper technique for installation. SMD component replacement demands precision tools including a temperature-controlled soldering station with fine tips, magnification equipment, and ESD-safe work environment. This repair should only be performed by qualified electronics technicians or certified Motorola service centers with experience in surface-mount technology and power supply circuits.
Dual bridge rectifiers provide two independent full-wave rectification circuits in a single compact package, making them ideal for applications requiring multiple DC voltage rails, split power supplies, or dual-channel power conversion. Common applications include generating positive and negative DC voltages from a single AC source, dual voltage rail power supplies, isolated power conversion, and compact multi-output power circuits. The bridge configuration converts AC voltage to pulsating DC, which is then smoothed by filter capacitors to provide stable DC power.
Understanding Dual Bridge Configuration: Each bridge rectifier circuit within the package contains four internal diodes arranged to provide full-wave rectification. The six-pin package typically provides AC input terminals and DC output terminals for two independent bridge circuits. This allows efficient utilization of board space while maintaining electrical isolation between the two rectification channels when required.
Critical Installation Notes: Verify the pinout configuration before installation by consulting the component datasheet and PCB silkscreen markings. Each bridge section has specific AC input pins and DC output pins that must be correctly connected. Improper wiring can result in no output, incorrect polarity, or component damage. Ensure adequate heat dissipation by maintaining proper solder joint thermal paths to the PCB ground plane or copper areas.
Apply solder quickly to all six pins, ensuring good electrical and thermal connections. Use flux to facilitate proper solder flow on the small SMD pads. After installation, clean any flux residue and verify proper circuit operation by measuring DC output voltages under no-load and load conditions. Check for proper ripple voltage and ensure filter capacitors are functioning correctly.
When to Replace
Bridge rectifiers can fail due to overvoltage transients, excessive current, thermal stress, or age-related degradation. Symptoms of rectifier failure include no DC output voltage, low output voltage, excessive ripple, overheating, or complete power supply failure. Failed rectifiers may develop shorted diodes, causing blown fuses or damaged transformer windings, or open diodes, resulting in half-wave rectification and poor voltage regulation.
Technical Specifications
- Type: Dual Bridge Rectifier
- Part Number: UMT1NFTN
- Configuration: Two independent full-wave bridge rectifiers
- Package: SOT-363 (SC-70-6) surface-mount, 6-pin
- Application: AC-to-DC power conversion, dual voltage generation
- Internal Structure: Four diodes per bridge circuit
Part Numbers
- Motorola Part Number: 4815267H01
- Component Designation: UMT1NFTN Dual Bridge Rectifier
- Package Type: SOT-363 (SC-70-6) Surface-Mount
- Configuration: DBRT (Dual Bridge Rectifier)
