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AUIRFZ48Z N-Channel MOSFET Equivalent & Substitute Parts
Part Overview
The AUIRFZ48Z is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 55V drain-to-source voltage and 61A continuous drain current in a Through Hole TO-220 package. This device belongs to the HEXFET® series and is classified as Obsolete product status. Due to its obsolete classification, identifying functionally equivalent substitute components is essential for design continuity, production planning, and long-term supply chain management. Substitute parts must maintain compatibility across electrical ratings, thermal characteristics, and mechanical packaging to ensure direct replacement capability.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| FET Type | N-Channel | — |
| Drain to Source Voltage (Vdss) | 55 | V |
| Current - Continuous Drain (Id) @ 25°C | 61 | A (Tc) |
| Rds On (Max) @ Id, Vgs | 11 | mOhm @ 37A, 10V |
| Vgs(th) (Max) @ Id | 4 | V @ 250µA |
| Gate Charge (Qg) (Max) @ Vgs | 64 | nC @ 10V |
| Power Dissipation (Max) | 91 | W (Tc) |
| Operating Temperature Range | -55 to 175 | °C (TJ) |
| Mounting Type | Through Hole | — |
| Package / Case | TO-220-3 | — |
Substitute Part Grouping Explanation
Substitute parts for the AUIRFZ48Z are identified based on strict electrical and mechanical compatibility criteria. The primary substitution logic is based on the following allowed parameters:
Electrical Compatibility Criteria:
- FET Type: Must be N-Channel
- Drain to Source Voltage (Vdss): Must be equal to or greater than 55V
- Continuous Drain Current (Id): Must be equal to or greater than 61A at 25°C
- Gate Threshold Voltage (Vgs(th)): Must be compatible at specified test conditions
- On-State Resistance (Rds On): Must not exceed the maximum specified value to ensure thermal performance
- Power Dissipation: Must support the thermal requirements of the application
Mechanical Compatibility Criteria:
- Mounting Type: Through Hole
- Package / Case: TO-220-3 (ensures pin compatibility and PCB footprint alignment)
Compliance Criteria:
- RoHS Status: ROHS3 Compliant
- Operating Temperature Range: Must cover -55°C to 175°C (TJ)
The DMNH6008SCTQ meets these criteria with enhanced electrical performance (60V Vdss, 130A Id, 210W power dissipation) while maintaining identical package configuration and compliance standards.
Parameter Comparison
| Parameter | AUIRFZ48Z (Main Part) | DMNH6008SCTQ (Substitute) | Compatibility |
|---|---|---|---|
| Manufacturer | Infineon Technologies | Diodes Incorporated | Different manufacturer |
| FET Type | N-Channel | N-Channel | Match |
| Drain to Source Voltage (Vdss) | 55V | 60V | Substitute rated higher |
| Current - Continuous Drain (Id) @ 25°C | 61A (Tc) | 130A (Tc) | Substitute rated higher |
| Rds On (Max) @ Id, Vgs | 11 mOhm @ 37A, 10V | 8 mOhm @ 20A, 10V | Substitute has lower resistance |
| Vgs(th) (Max) @ Id | 4V @ 250µA | 4V @ 250µA | Match |
| Gate Charge (Qg) (Max) @ Vgs | 64 nC @ 10V | 21 nC @ 10V | Substitute has lower gate charge |
| Vgs (Max) | ±20V | 20V | Substitute asymmetric |
| Power Dissipation (Max) | 91W (Tc) | 210W (Tc) | Substitute rated higher |
| Operating Temperature Range | -55°C to 175°C (TJ) | -55°C to 175°C (TJ) | Match |
| Mounting Type | Through Hole | Through Hole | Match |
| Package / Case | TO-220-3 | TO-220-3 | Match |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | Match |
| Product Status | Obsolete | Active | Substitute is active |
Engineering Selection Recommendations
The DMNH6008SCTQ from Diodes Incorporated is a qualified substitute for the obsolete AUIRFZ48Z. Selection is based on the following engineering factors:
Electrical Performance: The DMNH6008SCTQ exceeds the minimum electrical requirements of the AUIRFZ48Z across all critical parameters. The higher Vdss rating (60V vs. 55V) and significantly higher continuous drain current rating (130A vs. 61A) provide design margin. The lower on-state resistance (8 mOhm vs. 11 mOhm) and reduced gate charge (21 nC vs. 64 nC) indicate improved switching efficiency and reduced drive circuit loading.
Thermal Management: The DMNH6008SCTQ supports 210W maximum power dissipation compared to 91W for the AUIRFZ48Z, enabling superior thermal performance in the same TO-220-3 package.
Compliance and Qualification: Both devices are ROHS3 Compliant and operate across the identical temperature range (-55°C to 175°C TJ). The DMNH6008SCTQ carries AEC-Q101 automotive qualification, indicating enhanced reliability screening and process control.
Package Compatibility: Both devices use the TO-220-3 package, ensuring identical PCB footprint, pin configuration, and mechanical mounting compatibility.
Product Status: The DMNH6008SCTQ is classified as Active product status, ensuring long-term availability and supply chain continuity compared to the Obsolete AUIRFZ48Z.
Frequently Asked Questions (FAQ)
Q: Can the DMNH6008SCTQ be used as a direct replacement for the AUIRFZ48Z in existing designs?
A: Yes. Both devices share identical package configuration (TO-220-3), gate threshold voltage (4V @ 250µA), operating temperature range (-55°C to 175°C TJ), and compliance standards (ROHS3). The DMNH6008SCTQ meets or exceeds all electrical specifications of the AUIRFZ48Z, making it suitable for direct PCB substitution without layout modifications.
Q: What are the key differences between these two MOSFETs?
A: The DMNH6008SCTQ provides enhanced electrical performance: higher voltage rating (60V vs. 55V), significantly higher current rating (130A vs. 61A), lower on-state resistance (8 mOhm vs. 11 mOhm), and reduced gate charge (21 nC vs. 64 nC). These improvements result in lower power dissipation and improved switching characteristics. The DMNH6008SCTQ is also an Active product with AEC-Q101 qualification, whereas the AUIRFZ48Z is Obsolete.
Q: Are there any circuit design considerations when substituting the DMNH6008SCTQ for the AUIRFZ48Z?
A: The lower on-state resistance and gate charge of the DMNH6008SCTQ may reduce power dissipation in the application, potentially improving thermal performance. No circuit modifications are required for basic functionality. However, designs operating near the thermal limits of the original AUIRFZ48Z may benefit from thermal analysis to confirm adequate margin with the improved characteristics of the substitute.
Q: What is the significance of the AEC-Q101 qualification on the DMNH6008SCTQ?
A: AEC-Q101 is an automotive industry qualification standard that specifies enhanced reliability testing, process control, and quality assurance requirements. This qualification indicates that the DMNH6008SCTQ has undergone rigorous screening and is suitable for applications requiring high reliability and traceability.
Q: Are both devices available in the same packaging options?
A: Both the AUIRFZ48Z and DMNH6008SCTQ use the TO-220-3 package. The AUIRFZ48Z is supplied in standard packaging, while the DMNH6008SCTQ is supplied in Tube packaging. Both packages are compatible with standard PCB assembly processes and do not affect electrical or mechanical compatibility.
Q: Why is the AUIRFZ48Z classified as Obsolete?
A: Product obsolescence is determined by the manufacturer based on market demand, technology advancement, and production decisions. The AUIRFZ48Z has been discontinued by Infineon Technologies. The DMNH6008SCTQ, as an Active product from Diodes Incorporated, represents the current technology generation with improved performance characteristics and guaranteed long-term availability.
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