Non-Isolated Encapsulated DC-DC Converter

HR78 Series

Compact, Regulated, and Energy-efficient Power Conversion for IoT, Embedded, and Industrial Field Systems

ARCH’s HR78 Series is a compact SIP3 non-isolated DC-DC converter designed for industrial and embedded applications. Supporting wide input ranges up to 36VDC and delivering high efficiency up to 96%, it is an ideal replacement for traditional LM78 linear regulators. With low-profile dimensions, low no-load current, and operating temperatures from -40°C to +85°C, the HR78 is suitable for industrial control, automation, communication, and space-constrained PCB designs. EMC recommended circuits are also provided for improved system integration.

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High-Efficiency SIP3 DC-DC Power Solution

The HR78 Series is a compact SIP3 non-isolated DC-DC converter designed to replace traditional linear regulators with a high-efficiency switching power solution. With efficiency up to 96%, the HR78 helps reduce power loss and heat generation, improving overall system reliability and energy performance in industrial and embedded applications.

Ideal Replacement for LM78 Linear Regulators

Designed with an industrial-standard SIP3 package, the HR78 Series allows engineers to upgrade existing LM78-based designs with minimal PCB modification. Compared with conventional linear regulators, the HR78 significantly reduces thermal issues while supporting a wide input voltage range up to 36VDC for flexible industrial power applications.

Compact Design for Space-Constrained Applications

Featuring a low-profile and lightweight structure, the HR78 Series is suitable for compact PCB layouts and embedded systems where installation space is limited. Its small footprint makes it ideal for industrial control boards, communication devices, automation equipment, and distributed power architectures.

Reliable Operation in Industrial Environments

The HR78 Series supports operating temperatures from -40°C to +85°C and includes continuous short-circuit protection for stable performance in harsh environments. EMC recommended circuits are also provided to help optimize EMI performance and simplify system integration in industrial and automation applications.

Key Features

SIP3 Industrial Standard Package
Wide Input Range up to 36VDC
High Efficiency up to 96%
Compact Low-Profile Design
Operating Temperature: -40°C to +85°C
Short Circuit Protection
Low No-Load Current as Low as 0.2mA
Ideal Replacement for LM78 Linear Regulators
EMC Recommended Circuit Available
UL94 V-0 Flame-Retardant Plastic Case
3-Year Product Warranty

Applications

Industrial Control Systems
PLC & I/O Modules
Embedded Systems
MCU Power Supply
Communication Equipment
DIN Rail Applications
Automation Controllers
Smart Devices
Interface Boards

Specification

Model No.	HR78-3.3S/1000	HR78-5S/1000	HR78-6S/1000	HR78-9S/1000	HR78-12S/1000	HR78-15S/1000
Input Voltage (V.D.C.)	24V (6–36V)	24V (8–36V)	24V (10–36V)	24V (13–36V)	24V (16–36V)	24V (18–36V)
Output Voltage (V.D.C.)	3.3	5	6	9	12	15
Output Current (mA) Max.	1000	1000	1000	1000	1000	1000
Efficiency (%) Max.	89	93	94	94	96	96
Efficiency (%) Min.	82	85	89	89	94	93
Capacitor Load (µF) Max.	680	680	680	680	680	680
Ripple and Noise (Vp-p.) (max.)	100mVp-p	100mVp-p	124mVp-p	180mVp-p	240mVp-p	300mVp-p
Output Voltage Accuracy	± 3%	± 4%
Dimensions (L x W x H) (Tolerance ± 0.5 mm)	11.6 x 7.55 x 10.16 mm 0.457 x 0.297 x 0.4 inches
Operating Temperature	-40°C ~ +85°C
Short Circuit Protection	Continuous, Automatic Recovery