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Equivalent & Substitute Parts for ISF0509A
Part Overview
ISF0509A is an isolated DC-DC converter module from XP Power. It provides a single 9V output at up to 110mA from a 4.5V to 5.5V input, with 1W power output and 1kV isolation. The part is classified as obsolete, making it necessary to identify compatible substitute DC-DC converter modules with equivalent electrical and mechanical characteristics for continued design support and maintenance.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | ISF0509A |
| Type | Isolated Module |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 4.5V |
| Voltage - Input (Max) | 5.5V |
| Voltage - Output 1 | 9V |
| Current - Output (Max) | 110mA |
| Power (Watts) | 1 W |
| Voltage - Isolation | 1 kV |
| Operating Temperature | -40°C ~ 85°C |
| Efficiency | 76% |
| Mounting Type | Surface Mount |
| Package / Case | 8-SMD Module |
| Size / Dimension | 0.50" x 0.30" x 0.24" (12.7mm x 7.5mm x 6.0mm) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | Not Applicable |
| Applications | ITE (Commercial) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution is performed by matching the following key parameters:
- Type: Isolated Module
- Number of Outputs
- Voltage - Input Range
- Output Voltage
- Output Current (Maximum)
- Output Power
- Voltage Isolation
- Operating Temperature
- Mounting Type
- Package / Case
- Compliance and Agency Approvals
- RoHS Status
- Application Category
Each listed substitute is selected based strictly on the equivalency for these parameters.
Parameter Comparison
| Parameter | ISF0509A | IES0105S09 | IFS0105S09 | IAS0105D09 |
|---|---|---|---|---|
| Type | Isolated Module | Isolated Module | Isolated Module | Isolated Module |
| Number of Outputs | 1 | 1 | 1 | 2 |
| Voltage - Input (Min) | 4.5V | 4.5V | 4.5V | 4.5V |
| Voltage - Input (Max) | 5.5V | 5.5V | 5.5V | 5.5V |
| Voltage - Output 1 | 9V | 9V | 9V | 9V |
| Current - Output (Max) | 110mA | 111mA | 111mA | 56mA (per output) |
| Power (Watts) | 1 W | 999 mW | 999 mW | 1 W |
| Voltage - Isolation | 1 kV | 1.5 kV | 1.5 kV | 1.5 kV |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 105°C (With Derating) | -40°C ~ 105°C (With Derating) | -40°C ~ 105°C (With Derating) |
| Efficiency | 76% | 83% | 83% | 83% |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 8-SMD Module | 8-SMD Module, 5 Leads | 8-SMD Module | 10-SMD Module, 6 Leads |
| Size / Dimension | 0.50" x 0.30" x 0.24" | 0.52" x 0.33" x 0.29" | 0.52" x 0.33" x 0.29" | 0.60" x 0.33" x 0.29" |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | Not Applicable | Not Applicable | Not Applicable | Not Applicable |
| Applications | ITE (Commercial) | ITE (Commercial) | ITE (Commercial) | ITE (Commercial) |
| Product Status | Obsolete | Active | Active | Active |
Engineering Selection Recommendations
When selecting a substitute for ISF0509A, prioritize active parts with matching electrical and mechanical parameters, ROHS3 compliance, and suitable for ITE (Commercial) applications. Substitute parts IES0105S09, IFS0105S09, and IAS0105D09 are all active and provide relevant agency approvals. Selection should be based on the required number of outputs and package compatibility.
Frequently Asked Questions (FAQ)
Q: What are the key parameters to consider when substituting ISF0509A?
A: Key parameters include input voltage range, output voltage, output current, output power, isolation voltage, operating temperature, package type, compliance, and application category.
Q: Is package compatibility maintained between ISF0509A and substitute parts?
A: Substitute parts IES0105S09 and IFS0105S09 use 8-SMD module packages. IAS0105D09 uses a 10-SMD module, so verify PCB footprint match based only on the explicitly provided package information.
Q: Can IAS0105D09 be substituted if only one 9V output is required?
A: IAS0105D09 offers two outputs (9V, -9V at 56mA each). If the application supports this configuration and only one output is needed, strict evaluation must confirm compliance with the single-output requirement.
Q: Are all listed substitutes compliant with ROHS3 and ITE (Commercial) applications?
A: All substitutes in the provided list have ROHS3 compliant status and are specified for ITE (Commercial) applications.
Q: Are regulatory agency approvals the same for substitute parts?
A: Substitute parts IES0105S09, IFS0105S09, and IAS0105D09 have CE, TUV, and UL approvals as indicated.
Q: Does the operating temperature range change with substitute parts?
A: Substitute parts specify an operating temperature of -40°C to 105°C (with derating), compared to -40°C to 85°C for ISF0509A.
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