FQB15P12TM Equivalent & Substitute Parts

Part Overview

The FQB15P12TM is a P-Channel MOSFET manufactured by onsemi, rated for 120V drain-to-source voltage with 15A continuous drain current in a surface mount D2PAK package. This device is classified as obsolete, making identification of equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity. The part operates across a wide temperature range from -55°C to 175°C and is suitable for applications requiring P-channel switching and amplification in power management circuits.

Substiute Parts

FQB15P12TM

onsemiIn Stock: 1051FQB15P12TM Datasheet

Current PartRFQ

IRF5210STRLPBF

Infineon TechnologiesIn Stock: 36135IRF5210STRLPBF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FQB15P12TM is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• FET Type: P-Channel topology
• Package: Surface mount D2PAK (TO-263-3) form factor
• Drain-to-Source Voltage (Vdss): Equal to or greater than 120V
• Continuous Drain Current (Id): Equal to or greater than 15A
• Gate Threshold Voltage (Vgs(th)): Matching or compatible threshold characteristics
• Operating Temperature Range: Minimum coverage of -55°C to 175°C or equivalent industrial range

Electrical Performance Considerations:

• On-Resistance (Rds On): Lower values indicate improved performance but do not preclude substitution
• Gate Charge (Qg): Affects switching speed; higher values are acceptable for direct substitution
• Input Capacitance (Ciss): Influences gate drive requirements; variations are acceptable within circuit design margins
• Maximum Gate Voltage (Vgs): Must accommodate the drive voltage of the application circuit

The IRF5210STRLPBF meets the mandatory criteria for package, FET type, and thermal operating range. However, the substitute part exhibits a lower Vdss rating (100V versus 120V), which represents a trade-off in voltage headroom that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: IRF5210STRLPBF

The IRF5210STRLPBF is an active product from Infineon Technologies and serves as a functional substitute for the obsolete FQB15P12TM. Both devices share identical P-Channel topology, D2PAK surface mount packaging, and compatible gate threshold voltage characteristics.

Compliance and Certification Status:

• IRF5210STRLPBF: RoHS3 Compliant, REACH Unaffected, EAR99 classification
• FQB15P12TM: REACH Unaffected, EAR99 classification

The IRF5210STRLPBF provides superior electrical performance in terms of on-resistance (60 mOhm versus 200 mOhm) and higher continuous drain current capability (38A versus 15A), enabling operation at higher current levels with reduced power dissipation.

Critical Design Consideration: The IRF5210STRLPBF operates with a maximum Vdss rating of 100V, compared to the FQB15P12TM's 120V rating. Applications operating at voltages approaching or exceeding 100V require circuit-level voltage margin analysis to ensure safe operation. The maximum gate voltage specification of ±20V for the IRF5210STRLPBF is lower than the ±30V specification of the FQB15P12TM; gate drive circuits must be verified for compatibility.

Temperature Range: The IRF5210STRLPBF maximum junction temperature is 150°C, compared to 175°C for the FQB15P12TM. Applications requiring operation at junction temperatures between 150°C and 175°C require alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the IRF5210STRLPBF directly replace the FQB15P12TM in all applications?

A: Direct replacement is possible in applications where the circuit operates below 100V drain-to-source voltage and the gate drive voltage does not exceed ±20V. Applications designed for the full 120V rating of the FQB15P12TM require voltage margin verification before substitution.

Q: What is the significance of the lower Vdss rating on the IRF5210STRLPBF?

A: The 100V Vdss rating of the IRF5210STRLPBF provides 20V less voltage headroom than the FQB15P12TM. In circuits with voltage transients or marginal operating conditions, this reduced rating may present reliability concerns. Circuit analysis must confirm that maximum drain-to-source voltage remains below 100V under all operating and fault conditions.

Q: Are the D2PAK packages physically identical?

A: Both devices use the TO-263-3 D2PAK surface mount package with identical pinout and footprint. PCB layout and thermal management considerations remain unchanged during substitution.

Q: How do the gate charge differences affect circuit performance?

A: The IRF5210STRLPBF exhibits higher gate charge (230 nC versus 38 nC), requiring greater gate drive current or longer switching times. Gate driver circuits must be verified to supply sufficient current for the higher gate charge specification. This difference may increase switching losses in high-frequency applications.

Q: What is the impact of higher input capacitance on the IRF5210STRLPBF?

A: The IRF5210STRLPBF input capacitance of 2780 pF exceeds the FQB15P12TM specification of 1100 pF. Higher input capacitance increases gate drive power requirements and may affect switching speed. Gate driver impedance and frequency response must be evaluated for compatibility.

Q: Is the IRF5210STRLPBF suitable for applications requiring operation above 150°C junction temperature?

A: No. The IRF5210STRLPBF maximum junction temperature is 150°C. Applications requiring operation between 150°C and 175°C must identify alternative P-Channel MOSFETs with higher temperature ratings.

Q: What is the product availability status of each device?

A: The FQB15P12TM is classified as obsolete with 969 units in stock. The IRF5210STRLPBF is an active product with 36,088 units in stock, ensuring long-term availability and supply chain continuity.