ISA1209 DC DC Converter Equivalent & Substitute Parts

Part Overview

The ISA1209 is an isolated module DC DC converter manufactured by XP Power, designed to convert a 10.8V to 13.2V input to dual outputs of +9V and -9V at 56mA each, delivering 1W of power. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The ISA1209 features 1.5kV isolation, surface mount packaging, and operates across an extended temperature range of -40°C to 105°C, making it suitable for commercial ITE applications.

Key Parameters

Parameter	Value
Input Voltage Range	10.8V to 13.2V
Output Configuration	Dual Output: +9V / -9V
Output Current (Each)	56mA
Power Rating	1W
Isolation Voltage	1.5kV
Operating Temperature	-40°C to 105°C
Mounting Type	Surface Mount
Package Type	10-SMD Module, 6 Leads
Module Dimensions	15.2mm L x 8.3mm W x 7.0mm H

Substitute Part Grouping Explanation

Substitution of the ISA1209 is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

Input voltage range: 10.8V to 13.2V
Output voltage configuration: +9V and -9V dual outputs
Output current capacity: 56mA per output
Power rating: 1W
Isolation voltage: 1.5kV

Physical and Mechanical Specifications:

Mounting technology: Surface Mount
Package configuration: 10-SMD Module with 6 Leads
Form factor compatibility: Dimensions within acceptable tolerance

Environmental and Operational Specifications:

Operating temperature range: -40°C to 105°C
Application category: ITE (Commercial)

The IAS0112D09 meets all these criteria and serves as the direct equivalent to the obsolete ISA1209, with the additional benefit of active product status and enhanced regulatory compliance.

Parameter Comparison

Parameter	ISA1209	IAS0112D09
Manufacturer	XP Power	XP Power
Product Status	Obsolete	Active
Input Voltage (Min)	10.8V	10.8V
Input Voltage (Max)	13.2V	13.2V
Output 1	+9V	+9V
Output 2	-9V	-9V
Output Current (Max)	56mA, 56mA	56mA, 56mA
Power Rating	1W	1W
Isolation Voltage	1.5kV	1.5kV
Operating Temperature	-40°C to 105°C	-40°C to 105°C (With Derating)
Efficiency	80%	83%
Mounting Type	Surface Mount	Surface Mount
Package Type	10-SMD Module, 6 Leads	10-SMD Module, 6 Leads
Dimensions	15.2mm x 8.3mm x 7.0mm	15.2mm x 8.5mm x 7.3mm
Applications	ITE (Commercial)	ITE (Commercial)
Regulatory Approvals	None Listed	CE, UKCA, UL
Compliance Standard	61000	62368-1
RoHS Status	Not Specified	ROHS3 Compliant

Engineering Selection Recommendations

The IAS0112D09 is the direct functional equivalent to the ISA1209 and is the appropriate selection for all applications currently using or specifying the ISA1209. The transition from ISA1209 to IAS0112D09 is supported by the following factors:

Product Status: The ISA1209 is classified as obsolete, while the IAS0112D09 maintains active product status with significantly higher inventory availability (13,800 units versus 783 units), ensuring supply chain continuity.

Regulatory Compliance: The IAS0112D09 carries CE, UKCA, and UL approvals and complies with IEC 62368-1, compared to the ISA1209 which references only IEC 61000. The IAS0112D09 is certified as ROHS3 compliant, meeting current environmental regulations.

Performance Characteristics: The IAS0112D09 delivers improved efficiency at 83% compared to the ISA1209 at 80%, while maintaining identical electrical specifications and operating parameters.

Physical Compatibility: Dimensional differences are minimal (0.2mm in width and 0.3mm in height), presenting no practical integration obstacles in standard surface mount assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the IAS0112D09 be used as a direct replacement for the ISA1209 in existing designs?

A: Yes. The IAS0112D09 provides electrical and functional equivalence across all critical parameters: input voltage range, dual output configuration (+9V/-9V), output current capacity (56mA each), power rating (1W), isolation voltage (1.5kV), operating temperature range, and surface mount package configuration. The minimal dimensional variation does not impact PCB layout compatibility.

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

A: The primary differences are product status (ISA1209 is obsolete; IAS0112D09 is active), regulatory approvals (IAS0112D09 includes CE, UKCA, and UL certifications), efficiency rating (83% versus 80%), and compliance standards (IEC 62368-1 versus IEC 61000). The IAS0112D09 is also ROHS3 compliant.

Q: Are there any compatibility concerns with the package dimensions?

A: No. The dimensional differences are negligible: 0.2mm increase in width and 0.3mm increase in height. Both parts use identical 10-SMD Module, 6-Lead surface mount packaging and are compatible with standard PCB layouts designed for the ISA1209.

Q: Why is the IAS0112D09 more efficient than the ISA1209?

A: The IAS0112D09 achieves 83% efficiency compared to the ISA1209's 80% through design improvements in the IAS01 series. This enhanced efficiency is provided as a specification parameter and does not require additional design considerations.

Q: What is the inventory status for each part?

A: The ISA1209 has 783 units in stock with obsolete status. The IAS0112D09 has 13,800 units in stock with active product status, providing superior supply chain security for ongoing production and future requirements.

Q: Are both parts suitable for ITE commercial applications?

A: Yes. Both the ISA1209 and IAS0112D09 are specified for ITE (Commercial) applications and operate across the identical temperature range of -40°C to 105°C, making them suitable for the same application environments.

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