RPM3.3-3.0 Equivalent & Substitute Parts

Part Overview

The RPM3.3-3.0 is a non-isolated Point-of-Load (PoL) module DC-DC converter manufactured by Recom Power. This device delivers a fixed 3.3V output at up to 3A from a 3V to 17V input supply. The module is designed for commercial Information Technology Equipment (ITE) applications and features integrated protection functions including remote on/off control, overcurrent protection (OCP), overtemperature protection (OTP), short-circuit protection (SCP), and undervoltage lockout (UVLO). The RPM3.3-3.0 is classified as an active product with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and output specifications can be maintained across different input voltage ranges, mounting technologies, and package formats.

Substiute Parts

RPM3.3-3.0

Recom PowerIn Stock: 932RPM3.3-3.0 Datasheet

Current PartRFQ

K7803-3AR3

Mornsun America, LLCIn Stock: 1002K7803-3AR3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RPM3.3-3.0 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Fixed output voltage of 3.3V
• Maximum output current rating of 3A
• Non-isolated topology classification
• Single output configuration

Functional Feature Criteria:

• Short-circuit protection (SCP) as minimum required protection feature
• Operating temperature range support for -40°C minimum
• Active product status with current manufacturing availability

Mechanical and Packaging Criteria:

• Surface mount or through-hole mounting technology
• Physical form factor compatibility with application space constraints
• Moisture sensitivity level of 1 (Unlimited) or equivalent

The K7803-3AR3 qualifies as a substitute part based on matching the critical electrical output specifications (3.3V, 3A) and functional protection requirements (SCP). Differences in input voltage range (8V - 36V versus 3V - 17V), mounting technology (through-hole versus surface mount), package type (12-SIP versus 25-BLGA), and maximum operating temperature (85°C versus 100°C) represent design trade-offs that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

RPM3.3-3.0 Selection Criteria:

The RPM3.3-3.0 is the primary choice for applications requiring surface-mount integration with compact form factor (12.2mm x 12.2mm x 3.8mm). This device delivers superior efficiency at 97% and extended operating temperature capability to 100°C with derating. The RPM3.3-3.0 provides comprehensive protection features including overcurrent protection, overtemperature protection, short-circuit protection, undervoltage lockout, and remote on/off control. The device supports input voltages as low as 3V, making it suitable for battery-powered and low-voltage supply applications. RoHS3 compliance and active product status ensure long-term availability and regulatory alignment.

K7803-3AR3 Selection Criteria:

The K7803-3AR3 qualifies as a substitute when through-hole mounting technology is required or when board space permits a larger footprint (32.2mm x 9.1mm x 14.9mm). This device operates across a wider input voltage range (8V - 36V) and is suitable for applications with higher input supply voltages. The K7803-3AR3 maintains RoHS compliance and active product status. The reduced feature set (SCP only) and lower efficiency (90%) represent trade-offs that must be acceptable for the target application. The maximum operating temperature of 85°C is suitable for standard commercial ITE environments but may not support high-temperature derating scenarios.

Both devices are active products with current manufacturing availability and full regulatory compliance. Selection between these parts depends on specific application requirements for mounting technology, input voltage range, protection feature requirements, operating temperature range, and physical space constraints.

Frequently Asked Questions (FAQ)

Q: Can the K7803-3AR3 replace the RPM3.3-3.0 in all applications?

A: The K7803-3AR3 provides equivalent 3.3V, 3A output specifications and can substitute the RPM3.3-3.0 when the application input voltage range is 8V or higher. Applications requiring input voltages below 8V must use the RPM3.3-3.0. Applications requiring remote on/off control, overcurrent protection, overtemperature protection, or undervoltage lockout must use the RPM3.3-3.0, as the K7803-3AR3 provides only short-circuit protection.

Q: What are the mounting technology differences?

A: The RPM3.3-3.0 uses surface-mount technology with a 25-BLGA package, requiring reflow soldering to PCB pads. The K7803-3AR3 uses through-hole mounting with a 12-SIP package, requiring insertion into PCB holes and wave soldering or manual soldering. Surface-mount technology typically enables higher board density and automated assembly, while through-hole mounting provides mechanical robustness and easier manual rework.

Q: How do the input voltage ranges differ?

A: The RPM3.3-3.0 accepts input voltages from 3V to 17V, supporting low-voltage battery and regulated supply applications. The K7803-3AR3 accepts input voltages from 8V to 36V, supporting higher-voltage industrial and automotive supply applications. Applications with input supplies below 8V must use the RPM3.3-3.0.

Q: What is the efficiency difference between these parts?

A: The RPM3.3-3.0 operates at 97% efficiency, while the K7803-3AR3 operates at 90% efficiency. The 7% efficiency difference results in higher power dissipation in the K7803-3AR3, which may require additional thermal management in power-limited applications.

Q: Are there temperature range limitations?

A: The RPM3.3-3.0 operates from -40°C to 100°C with derating, supporting extended temperature applications. The K7803-3AR3 operates from -40°C to 85°C, suitable for standard commercial environments. Applications requiring operation above 85°C must use the RPM3.3-3.0.

Q: What protection features are included in each device?

A: The RPM3.3-3.0 includes overcurrent protection (OCP), overtemperature protection (OTP), short-circuit protection (SCP), undervoltage lockout (UVLO), and remote on/off control. The K7803-3AR3 includes only short-circuit protection (SCP). Applications requiring comprehensive protection must use the RPM3.3-3.0.

Q: Are both devices RoHS compliant?

A: Yes. The RPM3.3-3.0 is RoHS3 compliant, and the K7803-3AR3 is RoHS compliant. Both devices meet regulatory requirements for hazardous substance restrictions.

Q: What is the moisture sensitivity level for both devices?

A: Both the RPM3.3-3.0 and K7803-3AR3 have a moisture sensitivity level of 1 (Unlimited), indicating no special moisture control requirements during storage, handling, or assembly.