RB-0509S Equivalent & Substitute Parts Reference

Part Overview

The RB-0509S from Recom Power is an isolated DC-DC converter module delivering 9V at 1W from a 4.5V–5.5V input, with a 111mA output current. The product is in active status, RoHS3 compliant, and designed for ITE (Commercial) applications. In supply chain, qualification, or compliance scenarios, users may require alternative models with equivalent electrical and mechanical parameters to ensure continuous production or compatibility with new regulations and standards.

Key Parameters

Parameter	RB-0509S Value
Description	DC DC CONVERTER 9V 1W
Type	Isolated Module
Number of Outputs	1
Voltage - Input (Min)	4.5V
Voltage - Input (Max)	5.5V
Voltage - Output 1	9V
Current - Output (Max)	111mA
Power (Watts)	1 W
Voltage - Isolation	1 kV
Mounting Type	Through Hole
Package / Case	7-SIP Module, 5 Leads
Size / Dimension	0.77" L x 0.24" W x 0.40" H (19.7mm x 6.0mm x 10.2mm)
Product Status	Active
RoHS Status	ROHS3 Compliant
Operating Temperature	-40°C ~ 85°C
Efficiency	78%

Substitute Part Grouping Explanation

Substitution is determined by matching key electrical and mechanical parameters. The substitute model B0509LS-1WR3 is listed for the RB-0509S based on identical or compatible values in the following parameters:

Input Voltage Range
Output Voltage and Current
Power Rating
Isolation Voltage (equal or higher)
Mounting Type
Package/Casing Dimensions
Product Compliance (RoHS/REACH) These parameters ensure functionality and substitution suitability within the isolated DC-DC converter module category.

Parameter Comparison

Parameter	RB-0509S	B0509LS-1WR3
Manufacturer	Recom Power	Mornsun America, LLC
Description	DC DC CONVERTER 9V 1W	DC DC CONVERTER 9V 1W
Type	Isolated Module	Isolated Module
Number of Outputs	1	1
Voltage - Input (Min)	4.5V	4.5V
Voltage - Input (Max)	5.5V	5.5V
Voltage - Output 1	9V	9V
Current - Output (Max)	111mA	111mA
Power (Watts)	1 W	1 W
Voltage - Isolation	1 kV	1.5 kV
Mounting Type	Through Hole	Through Hole
Package / Case	7-SIP Module, 5 Leads	7-SIP Module, 4 Leads
Size / Dimension	0.77" L x 0.24" W x 0.40" H (19.7mm x 6.0mm x 10.2mm)	0.77" L x 0.24" W x 0.40" H (19.7mm x 6.0mm x 10.2mm)
Product Status	Active	Active
RoHS Status	ROHS3 Compliant	RoHS Compliant
Operating Temperature	-40°C ~ 85°C	-40°C ~ 105°C (With Derating)
Efficiency	78%	83%

Engineering Selection Recommendations

RB-0509S and B0509LS-1WR3 are both listed as active parts and are RoHS/REACH compliant. B0509LS-1WR3 includes additional product certifications: CB, CE, and cURus. Selection can be performed where matching product status and required compliance documentation are met.

Frequently Asked Questions (FAQ)

Q: Which key electrical parameters must match for substitution of RB-0509S DC-DC converters?
A: Input voltage range, output voltage and current, power rating, isolation voltage, mounting type, and package dimensions.

Q: Are mechanical parameters, such as package size and lead configuration, considered in substitution?
A: Yes, package size and mounting type must be compatible. Note that B0509LS-1WR3 uses a 7-SIP Module, 4 Leads, while RB-0509S uses 7-SIP Module, 5 Leads.

Q: Does the substitute part meet compliance requirements?
A: Both RB-0509S and B0509LS-1WR3 are RoHS and REACH compliant.

Q: Are operating temperature and efficiency relevant to substitution decisions?
A: Only the specified ranges and values are considered when matching substitutes. B0509LS-1WR3 operates over a wider temperature range with higher efficiency.

Q: Do substitute parts maintain equivalent isolation voltage?
A: The substitute part B0509LS-1WR3 provides a higher isolation voltage (1.5 kV) compared to RB-0509S (1 kV).

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