Overall Context:

This appears to be a data sheet or specification sheet for a series of AC/DC power supplies, likely intended for electronic devices. The power supplies come in different voltage models (12V, 24V, 48V, 110V), and variants with different suffixes (C12, FWC24, FWD etc) suggesting different design variations/features. The tables provide technical details on various performance characteristics.


1. General Features (Applicable to all models, with variations)

️· Operating Temperature: 0°C to +50°C
️· Storage Temperature: -20°C to +85°C
️· Withstand Voltage:
- Primary to Secondary: 1500V (for 110V models) – likely different for other voltages.
- Primary to Frame: 1500V (for 110V models)
- Secondary to Frame: 500V
️· Isolation Resistance: 50 MΩ (minimum)
️· Cooling: Convection
️· Protection:
- Overcurrent: Current limiting with automatic recovery
- Overvoltage: Zener diode clamping
- Reverse Voltage: Internal fuse (specific to 110V models, others may vary)
️· Dimensions/Weight: 85W x 135L x 31H / 390g (This appears to be a common size/weight, but may vary)

2. Model-Specific Specifications

Model Variant	Input Voltage (V)	Output Voltage (V)	Output Current (A)	Efficiency (%)	MTBF (Hours)	Switching Frequency (Hz)	Notes
VTA21B-FWC12	12	12	Not Specified	77	600,000	40
VTA21-FWC12	12	12	Not Specified	76	550,000	Not Specified
VTA22-FWC12	24	12	Not Specified	77	600,000	40
VTA22B-FWC12	24	12	Not Specified	78	600,000
VTA23-FWC12	24	12	Not Specified	79
VTA24-FWC12	24	12	Not Specified	77
VTA21B-FWC48	48	Not Specified	Not Specified	75	600,000	40
VTA21-FWC48	48	Not Specified	Not Specified	76	550,000	Not Specified
VTA22-FWC48	48	Not Specified	Not Specified	78	600,000
VTA22B-FWC48	48	Not Specified	Not Specified	79
VTA23-FWC48	48	Not Specified	Not Specified	77
VTA24-FWC48	48	Not Specified	Not Specified	76
VTA21B-FWD	110	Not Specified	20 (Max)	76	550,000	Not Specified

Important Notes & Gaps in Information:

️· Output Current: The output current is not explicitly specified for any model in these tables.
️· Suffixes (FWC, FWD): It's unclear precisely what the suffixes (FWC, FWD) differentiate between the models. They likely indicate specific design features or certifications.
️· Variations within Models: There are numerous subtle variations across models, suggesting that they have different design considerations.
️· Missing Specifications: Additional specifications like ripple and noise, efficiency curves, inrush current, and standby power consumption may be available in a full datasheet.