RAC10-24SA AC/DC Converter 24V 10W Equivalent & Substitute Parts

Part Overview

The RAC10-24SA is an enclosed AC/DC converter from Recom Power's POWERLINE RAC10-A series, delivering 24V output at 426mA maximum current with 10W power rating. This unit accepts 90–264 VAC input and is designed for ITE (Commercial) applications with short-circuit protection (SCP) features.

The RAC10-24SA is classified as Obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or field replacement requirements for systems currently utilizing this converter.

Key Parameters

Parameter	Value
Output Voltage	24V
Maximum Output Current	426mA
Power Rating	10W
Input Voltage Range	90–264 VAC
Mounting Type	Through Hole
Package Type	6-DIP Module, 5 Leads
Operating Temperature Range	−25°C to +70°C
Line Regulation	±0.3%
Load Regulation	±0.5%
Approval Agencies	CE, cULus
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the RAC10-24SA are identified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

Output voltage: 24V (fixed requirement)
Output power: 10W (fixed requirement)
Input voltage compatibility: Minimum 90 VAC support required
Mounting type: Through Hole (mechanical compatibility)
Regulatory compliance: CE and cULus certifications

Secondary Compatibility Factors:

Maximum output current: ≥420mA (meets or exceeds RAC10-24SA's 426mA)
Operating temperature range: Supports application environment
Package form factor: DIP module configuration
RoHS3 compliance: Environmental and regulatory alignment

The substitute parts identified—RAC10-24SC/277 and RAC10-24SK/277—satisfy all primary criteria and maintain functional equivalence for 24V, 10W AC/DC conversion applications. Both are Recom Power POWERLINE series converters with universal input voltage ranges (80–305 VAC), exceeding the RAC10-24SA's minimum input specification.

Parameter Comparison

Parameter	RAC10-24SA	RAC10-24SC/277	RAC10-24SK/277
Manufacturer	Recom Power	Recom Power	Recom Power
Output Voltage	24V	24V	24V
Maximum Output Current	426mA	420mA	420mA
Power Rating	10W	10W	10W
Input Voltage Range	90–264 VAC	80–305 VAC	80–305 VAC
Mounting Type	Through Hole	Through Hole	Through Hole
Package Type	6-DIP Module, 5 Leads	4-DIP Module	4-DIP Module
Operating Temperature Range	−25°C to +70°C	−20°C to +70°C	−40°C to +80°C
Efficiency	74%	80%	84%
Line Regulation	±0.3%	±0.3%	±0.5%
Load Regulation	±0.5%	±0.5%	±1%
Approval Agencies	CE, cULus	CE, cULus	CE, cURus
Product Status	Obsolete	Not For New Designs	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

RAC10-24SK/277 (Preferred Substitute)

The RAC10-24SK/277 is the recommended substitute for new designs and ongoing production. This part carries Active product status, ensuring long-term availability and supply chain stability. It provides the widest operating temperature range (−40°C to +80°C), highest efficiency (84%), and meets current regulatory requirements with CE and cURus certifications. The universal input voltage range (80–305 VAC) provides superior input tolerance compared to the RAC10-24SA. Output current (420mA) is within 1.4% of the original specification, maintaining functional equivalence for 24V, 10W applications.

RAC10-24SC/277 (Secondary Substitute)

The RAC10-24SC/277 serves as an alternative substitute with Not For New Designs status. This part offers improved efficiency (80%) and maintains the same line and load regulation specifications as the RAC10-24SA (±0.3% and ±0.5%, respectively). The universal input voltage range (80–305 VAC) and 4-DIP package provide compatibility with most applications. However, the narrower operating temperature range (−20°C to +70°C) and discontinued design status make this option suitable only for legacy system support or field replacement where supply availability is critical.

Package Consideration

Both substitute parts employ a 4-DIP Module package, compared to the RAC10-24SA's 6-DIP Module with 5 leads. PCB layout modifications are required to accommodate the different pin configuration and reduced footprint. Electrical functionality remains equivalent; mechanical integration must be evaluated for each application.

Frequently Asked Questions (FAQ)

Q: Can RAC10-24SC/277 or RAC10-24SK/277 directly replace RAC10-24SA in existing designs?

A: Both parts deliver 24V output at 10W power rating with Through Hole mounting, satisfying the core electrical requirements. However, the package type differs (4-DIP Module versus 6-DIP Module, 5 Leads), requiring PCB layout modification. Pin configuration must be verified against the original design schematic before implementation.

Q: What is the significance of the "/277" designation in the substitute part numbers?

A: The "/277" suffix indicates these converters are rated for universal input voltage operation (80–305 VAC), providing extended input range capability compared to the RAC10-24SA's 90–264 VAC specification. This designation reflects the product series variant within Recom Power's POWERLINE converter family.

Q: Why is RAC10-24SK/277 recommended over RAC10-24SC/277?

A: RAC10-24SK/277 holds Active product status, ensuring continued manufacturing and supply availability. It also provides superior performance characteristics: wider operating temperature range (−40°C to +80°C versus −20°C to +70°C), higher efficiency (84% versus 80%), and broader application support (Household Appliances and ITE Commercial). RAC10-24SC/277 is classified as Not For New Designs, limiting its suitability for ongoing production.

Q: Are the output current specifications compatible?

A: Yes. The RAC10-24SA specifies 426mA maximum output current, while both substitutes deliver 420mA. This 1.4% difference is within acceptable tolerance for 24V, 10W converter applications and does not compromise functional equivalence.

Q: Do the substitute parts maintain the same regulatory certifications?

A: Both substitutes hold CE certification. RAC10-24SC/277 carries cULus certification (matching RAC10-24SA), while RAC10-24SK/277 carries cURus certification. All three parts are ROHS3 compliant and REACH unaffected, meeting current environmental and safety standards.

Q: What are the efficiency improvements in the substitute parts?

A: RAC10-24SA operates at 74% efficiency. RAC10-24SC/277 achieves 80% efficiency, and RAC10-24SK/277 reaches 84% efficiency. These improvements reduce thermal dissipation and power consumption in end-user applications, providing operational benefits without affecting output voltage or current specifications.

Q: How do line and load regulation specifications compare?

A: RAC10-24SA and RAC10-24SC/277 both specify ±0.3% line regulation and ±0.5% load regulation. RAC10-24SK/277 specifies ±0.5% line regulation and ±1% load regulation. For precision voltage applications requiring tighter regulation, RAC10-24SA or RAC10-24SC/277 are preferred; for general ITE and household appliance applications, RAC10-24SK/277 is acceptable.

Q: What is the impact of different operating temperature ranges?

A: RAC10-24SA operates from −25°C to +70°C, RAC10-24SC/277 from −20°C to +70°C, and RAC10-24SK/277 from −40°C to +80°C. Applications requiring extended low-temperature operation (below −20°C) or high-temperature environments (above +70°C) must use RAC10-24SK/277. Standard ITE commercial applications typically operate within −20°C to +70°C, where all three parts are suitable.

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