RAC40-12DB AC/DC Converter Equivalent & Substitute Parts

Part Overview

The RAC40-12DB is an enclosed AC/DC converter manufactured by Recom Power, delivering dual 12V outputs at 1.67A each with 40W total power capacity. This unit accepts universal AC input (90–264 VAC) and is designed for ITE commercial applications. The product is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new procurement requirements.

Key Parameters

Parameter	Value
Power Rating	40 W
Number of Outputs	2
Output Voltage	12V
Output Current (Max)	1.67A per output
Input Voltage Range	90–264 VAC
Mounting Type	Through Hole
Package Type	7-DIP Module, 5 Leads
Physical Dimensions	89.0mm L × 63.5mm W × 27.0mm H
Operating Temperature Range	−40°C to +70°C (with derating)
Efficiency	83%
Line Regulation	±0.5%
Load Regulation	±1%
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the RAC40-12DB is determined by equivalence across the following critical parameters:

Electrical Specifications: Output voltage (12V), output current capacity (minimum 1.67A per channel), power rating (40W), and input voltage range compatibility (90–264 VAC minimum).

Physical Compatibility: Identical package type (7-DIP Module, 5 Leads), through-hole mounting, and matching form factor (89.0mm × 63.5mm × 27.0mm).

Regulatory Compliance: Certification to IEC 60950-1 or equivalent safety standards for enclosed AC/DC converters.

Environmental Specifications: Operating temperature range and RoHS compliance status.

The KMD40-1212 meets these substitution criteria with equivalent electrical performance, identical physical packaging, and compatible regulatory certifications.

Parameter Comparison

Parameter	RAC40-12DB (Main Part)	KMD40-1212 (Substitute)	Compatibility
Manufacturer	Recom Power	TDK-Lambda Americas Inc	Different manufacturer
Power Rating	40 W	40 W	Equivalent
Number of Outputs	2	2	Equivalent
Output Voltage	12V	12V	Equivalent
Output Current (Max)	1.67A per output	1.66A per output	Compatible (within 1% tolerance)
Input Voltage (AC)	90–264 VAC	90–264 VAC	Equivalent
Input Voltage (DC)	Not specified	100–375 VDC	Substitute offers extended range
Mounting Type	Through Hole	Through Hole	Equivalent
Package Type	7-DIP Module, 5 Leads	7-DIP Module, 5 Leads	Equivalent
Physical Dimensions	89.0mm × 63.5mm × 27.0mm	89.0mm × 63.5mm × 27.0mm	Equivalent
Operating Temperature	−40°C to +70°C	−25°C to +70°C	Substitute has narrower low-temperature range
Efficiency	83%	83%	Equivalent
Line Regulation	±0.5%	0.5%	Equivalent
Load Regulation	±1%	1%	Equivalent
Product Status	Obsolete	Not For New Designs	Both discontinued from active production
RoHS Status	ROHS3 Compliant	RoHS Compliant	Both compliant
Safety Certifications	CE; IEC 60950-1	CE, EN, IEC, UL; IEC 60950-1, IEC 60601-1, IEC 62368-1	Substitute has broader certification scope

Engineering Selection Recommendations

Direct Substitution Feasibility: The KMD40-1212 is electrically and mechanically compatible with the RAC40-12DB for applications requiring dual 12V outputs at 40W power capacity with through-hole mounting in a 7-DIP package.

Electrical Compatibility: Output current specification of the KMD40-1212 (1.66A per channel) is within 1% of the RAC40-12DB (1.67A per channel), ensuring equivalent load-handling capability. Both units deliver 83% efficiency with identical line and load regulation characteristics.

Physical Compatibility: Identical package dimensions and through-hole mounting configuration enable direct PCB-level substitution without layout modifications.

Temperature Operating Range Consideration: The KMD40-1212 operates from −25°C to +70°C, compared to the RAC40-12DB range of −40°C to +70°C. Applications requiring operation below −25°C require verification of thermal performance or alternative sourcing.

Regulatory Compliance: The KMD40-1212 carries expanded certifications (UL, EN, IEC 60601-1 for medical applications, and IEC 62368-1) beyond the RAC40-12DB baseline (CE, IEC 60950-1). Both units meet IEC 60950-1 requirements for enclosed AC/DC converters in commercial applications.

Product Status: Both units are discontinued from active production. The KMD40-1212 designation as "Not For New Designs" indicates limited future availability. Procurement should prioritize current inventory levels and establish long-term supply chain alternatives.

Frequently Asked Questions (FAQ)

Q: Can the KMD40-1212 replace the RAC40-12DB in existing designs?

A: Yes, for applications operating within the −25°C to +70°C temperature range. The KMD40-1212 provides equivalent electrical performance (40W, dual 12V outputs at 1.66A), identical physical packaging (7-DIP, 5-lead through-hole), and compatible safety certifications (IEC 60950-1). Applications requiring operation below −25°C require thermal performance assessment.

Q: What are the key differences between these two converters?

A: The primary differences are manufacturer (Recom Power vs. TDK-Lambda), operating temperature range (RAC40-12DB extends to −40°C; KMD40-1212 minimum is −25°C), and regulatory certifications (KMD40-1212 includes additional medical and audio/video standards). Output current differs by less than 1% (1.67A vs. 1.66A per channel).

Q: Are there any input voltage differences?

A: Both units accept 90–264 VAC input. The KMD40-1212 additionally accepts 100–375 VDC input, providing extended input flexibility not available in the RAC40-12DB.

Q: Will the KMD40-1212 fit the same PCB footprint?

A: Yes. Both converters use identical 7-DIP Module packaging with 5 leads and matching physical dimensions (89.0mm × 63.5mm × 27.0mm), enabling direct PCB substitution without layout changes.

Q: What certifications does each unit carry?

A: The RAC40-12DB carries CE marking and IEC 60950-1 certification. The KMD40-1212 carries CE, EN, and UL markings with certifications to IEC 60950-1, IEC 60601-1 (medical), and IEC 62368-1 (audio/video). Both meet commercial AC/DC converter safety requirements.

Q: Are both units RoHS compliant?

A: Yes. The RAC40-12DB is ROHS3 compliant. The KMD40-1212 is RoHS compliant. Both meet hazardous substance restriction requirements.

Q: What is the current availability status of these parts?

A: Both units are discontinued. The RAC40-12DB is classified as obsolete; the KMD40-1212 is marked "Not For New Designs." Current inventory availability should be confirmed with authorized distributors before procurement decisions.

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