P78A05-1000 CUI Inc Power Supply (Other) In Stock
CUI Inc P78A05-1000 is a non-isolated DC-DC regulated power supply module in a SIP-3 through-hole package, converting 8 V to 28 V input to a regulated 5 V output at up to 1000 mA. With 91% efficiency and UL approval, it operates across a wide input range suitable for 12 V and 24 V systems. Ideal for industrial automation, embedded computing, and instrumentation boards requiring a compact, efficient 5 V point-of-load regulator.
- Manufacturer
- CUI Inc
- Package
- Other
- Pin Count
- 3
- Lifecycle
- TRANSFERRED
- Datasheet
- P78A05-1000 Datasheet PDF
- Category
- Power Supply
- Price
- From $5.6100(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 91% conversion efficiency with 8 V to 28 V wide input range enabling low heat dissipation and compatibility with 12 V and 24 V supply rails
- 1000 mA (1 A) regulated 5 V output in a compact SIP-3 footprint replacing bulky linear regulators without a heatsink
- UL-approved design with 1% maximum line regulation for reliable, standards-compliant operation in industrial and medical equipment
- Drop-in switching regulator replacement for 78xx series linear regulators, reducing power loss and board thermal management requirements
Applications
The CUI Inc P78A05-1000 is used as a point-of-load 5 V regulator in industrial PLC modules, field instruments, and embedded controller boards powered from 12 V or 24 V system rails where up to 1 A of 5 V output current is needed with minimal power dissipation. Its 91% efficiency makes it a direct replacement for 7805-type linear regulators, eliminating the need for heatsinks and reducing board operating temperature significantly in enclosed enclosures. The SIP-3 form factor allows it to occupy the same through-hole footprint as a linear regulator while delivering far lower thermal stress at full 1 A load.
Specifications
| Pbfree Code | Yes |
| YTEOL | 6 |
| Analog IC - Other Type | DC-DC REGULATED POWER SUPPLY MODULE |
| Approvals | UL |
| Efficiency (Main Output) | 91% |
| Input Voltage-Max | 28V |
| Input Voltage-Min | 8V |
| Input Voltage-Nom | 24V |
| JESD-30 Code | R-PSIP-T3 |
| Line Regulation-Max | 1% |
| Load Regulation-Max | 1.5% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 1A |
| Output Voltage-Max | 5.25V |
| Output Voltage-Min | 4.75V |
| Output Voltage-Nom | 5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SIP3,.08 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Protections | OVER CURRENT; SHORT CIRCUIT |
| Ripple Voltage (Main Out) | 0.04242Vrms |
| Surface Mount | NO |
| Technology | HYBRID |
| Temperature Grade | OTHER |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Total Power Output-Max | 5W |
| Trim/Adjustable Output | NO |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does the P78A05-1000 support and how efficient is it at full load?
The P78A05-1000 accepts an input voltage from 8 V to 28 V, making it compatible with both 12 V and 24 V system rails commonly found in industrial and embedded applications. At full 1000 mA output load on the 5 V rail, it achieves 91% conversion efficiency, meaning only approximately 0.5 W of power is dissipated as heat at a 12 V input, compared to 7 W dissipated by an equivalent 7805 linear regulator.
Can the P78A05-1000 replace a 7805 linear regulator in an existing PCB design without layout changes?
Yes, the P78A05-1000 is specifically designed to be a pin-compatible drop-in replacement for 78xx series 3-terminal linear regulators in a SIP-3 through-hole package. The input, output, and ground pins maintain the same physical arrangement, so no PCB changes are required. The switching topology delivers 1 A at 5 V with 91% efficiency versus the 7805's approximately 40-50% efficiency at similar loads, dramatically reducing heatsink size or eliminating it entirely.
What certifications does the P78A05-1000 hold and why does that matter for industrial equipment design?
The P78A05-1000 carries UL approval, which is required for many industrial, commercial, and medical equipment certifications under end-product safety standards such as UL 61010 and UL 508. A pre-approved power module with 1% maximum line regulation simplifies the compliance path for the full system, reducing testing time and documentation burden. With a 28 V maximum input, it also tolerates transient overvoltages common on 24 V industrial power buses without requiring additional input clamping components.
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About CUI Inc
CUI Inc is a leading electronic component manufacturer. FindMyChip sources CUI Inc ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
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| 20+ | $6.1100 | $122.20 |
| 100+ | $5.8700 | $587.00 |
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