FDC638P-P Equivalent & Substitute Parts

Part Overview

The FDC638P-P is a P-Channel MOSFET manufactured by onsemi, designed for surface mount applications in the SuperSOT™-6 package. This device operates at 20V drain-to-source voltage with a continuous drain current rating of 4.5A and maximum power dissipation of 1.6W. The FDC638P-P is classified as obsolete, which necessitates identification of equivalent substitute components for ongoing design support and production requirements. Active equivalent parts are available that maintain identical electrical and mechanical specifications.

Substiute Parts

FDC638P-P

onsemiIn Stock: 863FDC638P-P Datasheet

Current PartRFQ

FDC638P

onsemiIn Stock: 65446FDC638P Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FDC638P-P is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must satisfy the following criteria:

Electrical Parameters (Mandatory Match):

• FET Type: P-Channel
• Technology: MOSFET (Metal Oxide)
• Drain to Source Voltage (Vdss): 20V
• Continuous Drain Current (Id) @ 25°C: 4.5A (Ta)
• On-State Resistance (Rds On Max): 48mOhm @ 4.5A, 4.5V
• Gate Threshold Voltage (Vgs(th) Max): 1.5V @ 250µA
• Gate Charge (Qg Max): 14nC @ 4.5V
• Maximum Gate Voltage (Vgs Max): ±8V
• Input Capacitance (Ciss Max): 1160pF @ 10V
• Power Dissipation (Max): 1.6W (Ta)
• Operating Temperature Range: -55°C to 150°C (TJ)

Mechanical Parameters (Mandatory Match):

• Package Type: SOT-23-6 Thin, TSOT-23-6
• Mounting Type: Surface Mount
• Series: PowerTrench®

The FDC638P is identified as a parametric equivalent that maintains all specified electrical and mechanical characteristics while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The FDC638P is the direct substitute for the obsolete FDC638P-P. Both components are manufactured by onsemi and share identical electrical specifications, thermal characteristics, and mechanical packaging. The FDC638P maintains active product status, ensuring long-term availability and supply chain continuity.

The FDC638P is ROHS3 compliant and carries REACH Unaffected certification, meeting current regulatory requirements for electronic component procurement. Both parts operate within the same temperature range (-55°C to 150°C junction temperature) and maintain equivalent moisture sensitivity classification (MSL 1, Unlimited).

For applications currently utilizing the FDC638P-P, direct substitution with the FDC638P is supported without circuit modification or re-qualification. The identical on-state resistance (48mOhm @ 4.5A, 4.5V), gate charge (14nC @ 4.5V), and input capacitance (1160pF @ 10V) ensure equivalent switching performance and thermal behavior.

Frequently Asked Questions (FAQ)

Q: Can the FDC638P directly replace the FDC638P-P in existing designs?

A: Yes. The FDC638P is a direct parametric equivalent with identical electrical and mechanical specifications. No circuit modifications are required for substitution.

Q: What is the primary difference between FDC638P-P and FDC638P?

A: The FDC638P-P is classified as obsolete, while the FDC638P maintains active product status. Both components share identical performance characteristics and packaging.

Q: Are there packaging differences between these parts?

A: No. Both the FDC638P-P and FDC638P use the SOT-23-6 Thin (TSOT-23-6) surface mount package with identical pin configuration and footprint.

Q: What is the on-state resistance specification for this MOSFET?

A: The maximum on-state resistance (Rds On) is 48mOhm, measured at a drain current of 4.5A and gate-source voltage of 4.5V.

Q: What is the maximum continuous drain current rating?

A: The maximum continuous drain current (Id) is 4.5A at 25°C ambient temperature.

Q: What is the gate charge specification?

A: The maximum gate charge (Qg) is 14nC, measured at a gate-source voltage of 4.5V.

Q: What is the input capacitance of this device?

A: The maximum input capacitance (Ciss) is 1160pF, measured at a drain-source voltage of 10V.

Q: What is the maximum drain-to-source voltage rating?

A: The maximum drain-to-source voltage (Vdss) is 20V.

Q: What is the operating temperature range?

A: The operating junction temperature range is -55°C to 150°C.

Q: Is the FDC638P RoHS compliant?

A: Yes. The FDC638P is ROHS3 compliant.

Q: What is the moisture sensitivity level for these components?

A: Both parts carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions.

Q: Are there any supply chain advantages to using the FDC638P?

A: Yes. The FDC638P maintains active product status with significantly higher inventory availability (65,400 pieces in stock) compared to the obsolete FDC638P-P (761 pieces in stock).