ISP1203A Equivalent & Substitute Parts Reference

Part Overview

The ISP1203A is an isolated module DC-DC converter by XP Power, delivering 3.3V at up to 500mA output with a 9V–18V input range. It is designed for ITE (Commercial) applications and features 1.5 kV isolation, SCP, and compliance with ROHS3 standards. The part is obsolete, making it necessary to identify direct substitute models with matching electrical and mechanical parameters to ensure continued supply and compatibility.

Key Parameters

Parameter	Value
Manufacturer	XP Power
Category
Description	DC DC CONVERTER 3.3V 2W
Type	Isolated Module
Number of Outputs	1
Voltage - Input (Min)	9V
Voltage - Input (Max)	18V
Voltage - Output 1	3.3V
Current - Output (Max)	500mA
Power (Watts)	2 W
Voltage - Isolation	1.5 kV
Applications	ITE (Commercial)
Features	SCP
Operating Temperature	-40°C ~ 85°C
Efficiency	70%
Mounting Type	Surface Mount
Package / Case	16-SMD Module, 6 Leads
Size / Dimension	0.94" L x 0.54" W x 0.31" H (23.9mm x 13.7mm x 8.0mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute selection is based strictly on matching key electrical and mechanical parameters, including:

Isolated module type
Input voltage range (minimum 9V, maximum 18V or greater)
Output voltage (3.3V)
Output current (minimum 500mA)
Power rating (2W or greater)
Isolation rating (1.5 kV)
Mounting type (Surface Mount)
Package size and footprint
Operating temperature range
Application (ITE/Commercial)
Compliance with RoHS standards
Matching or better MSL ratings

Parameter Comparison

Parameter	ISP1203A (XP Power)	ATA00F18S-L (ARTESYN / Advanced Energy)
Type	Isolated Module	Isolated Module
Number of Outputs	1	1
Voltage - Input (Min)	9V	9V
Voltage - Input (Max)	18V	36V
Voltage - Output 1	3.3V	3.3V
Current - Output (Max)	500mA	600mA
Power (Watts)	2 W	2 W
Voltage - Isolation	1.5 kV	1.5 kV
Applications	ITE (Commercial)	ITE (Commercial)
Features	SCP	Remote On/Off, OCP, SCP
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Efficiency	70%	75%
Mounting Type	Surface Mount	Surface Mount
Package / Case	16-SMD Module, 6 Leads	16-SMD Module, 7 Leads
Size / Dimension	0.94" L x 0.54" W x 0.31" H (23.9mm x 13.7mm x 8.0mm)	0.94" L x 0.54" W x 0.31" H (23.9mm x 13.7mm x 8.0mm)
RoHS Status	ROHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	2 (1 Year)

Engineering Selection Recommendations

The ISP1203A is marked as obsolete, while the substitute ATA00F18S-L is active. Both models are RoHS compliant and have similar mechanical dimensions, mounting, and output specifications. The substitute ATA00F18S-L provides additional features and a slightly different MSL. No additional selection criteria are applicable based strictly on the provided part status, compliance, and certifications.

Frequently Asked Questions (FAQ)

Q: What key specifications must match for a DC-DC converter substitute?
A: Parameters including module type, input voltage range, output voltage and current, power rating, isolation, mounting type, package size, operating temperature, and compliance status must match.

Q: Is the package of ATA00F18S-L mechanically compatible with ISP1203A?
A: Both DC-DC converters have the same size and dimensions (0.94" x 0.54" x 0.31"), with a 16-SMD module case; ISP1203A has 6 leads, and ATA00F18S-L has 7 leads.

Q: What parameters should be verified regarding compliance and inventory?
A: Both parts are RoHS compliant and suitable for ITE (Commercial) applications. The obsolete status of ISP1203A makes ATA00F18S-L the available substitute.

Q: Are there differences in Moisture Sensitivity Level?
A: ISP1203A has MSL 1 (Unlimited), while ATA00F18S-L has MSL 2 (1 Year).

Q: Does the substitute provide the same isolation and application suitability?
A: Both provide 1.5 kV isolation and are suitable for ITE (Commercial) applications.

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