ABB CMA121 3DDE300401 (SYNPOL D) Generator Control Power

Product Description

The CMA121 3DDE300401 (Synpol D) is a highly reliable, heavy-duty DC-to-DC converter power supply module engineered by ABB for dedicated integration within Synpol D excitation and industrial control architectures. 

Technical Specifications

• Manufacturer: ABB

• System Series Family: Synpol D Control / Excitation Architecture

• Model Designation: CMA121

• Global Part Number / Product ID: 3DDE300401

• Device Classification: Regulated DC-to-DC step-down power converter module

• Input DC Voltage Window: 12 VDC to 36 VDC range

• Nominal Regulated Output: 5 VDC

• Maximum Continuous Output Current: 4 A

• Total Rated Power Capacity: 20 W

• Energy Efficiency Profile: Approximately 85% conversion rate

• Built-in Hardware Protections: Comprehensive overvoltage, overcurrent, and automatic short-circuit cutoff loops

• Ambient Operating Temperature Envelope: -20 to +70 degrees C

• Storage Temperature Limits: -40 to +85 degrees C

• Relative Humidity Tolerance: 5% to 95% RH (Non-condensing)

• Physical Case Dimensions (W x H x D): 100 mm x 50 mm x 30 mm

• Product Net Weight: 200 grams (Approx. 0.44 lbs)

Industrial Application Scenarios

The CMA121 3DDE300401 (Synpol D) module is frequently deployed inside the control and regulatory circuits of generator excitation systems, large industrial rectifiers, and specialized synchronizer panels. In these heavy utility applications, large switching spikes or inductive feedback from heavy generator rotors can cause substantial electrical noise on the primary DC rails. The CMA121 isolates and cleans up this incoming feed, transforming it into a highly precise 5 VDC logic plane. This protects and powers micro-controller units, gate-pulse triggers, and communication sub-cards that cannot tolerate voltage dips without tripping out the main generator.