FDP027N08B N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The FDP027N08B is an N-Channel MOSFET manufactured by onsemi, rated for 80V drain-to-source voltage with 120A continuous drain current at 25°C. This device is packaged in a TO-220-3 through-hole configuration and is part of the PowerTrench® series. The FDP027N08B is currently listed as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. Substitute parts must maintain electrical and mechanical compatibility within the specified parameter ranges to ensure direct replacement capability.

Key Parameters

Parameter	Value	Unit
Drain-to-Source Voltage (Vdss)	80	V
Continuous Drain Current (Id) @ 25°C	120	A (Tc)
On-State Resistance (Rds On Max) @ 100A, 10V	2.7	mOhm
Gate Threshold Voltage (Vgs(th) Max) @ 250µA	4.5	V
Gate Charge (Qg Max) @ 10V	178	nC
Power Dissipation (Max)	246	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-220-3	Through Hole
Input Capacitance (Ciss Max) @ 40V	13530	pF

Substitute Part Grouping Explanation

Substitute parts for the FDP027N08B are identified based on strict electrical and mechanical parameter compatibility. The primary substitution criteria are:

Critical Matching Parameters:

Drain-to-Source Voltage (Vdss): 80V minimum
Continuous Drain Current (Id): 120A or greater at 25°C
On-State Resistance (Rds On): 2.7mOhm or lower at specified conditions
Package Type: TO-220-3 through-hole configuration
Operating Temperature Range: -55°C to 175°C minimum

Substitution Categories:

Direct Equivalent (Same Manufacturer): FDP027N08B-F102 is an onsemi part with identical electrical specifications and the same base product number (FDP027). The primary difference is packaging format (Tube versus unspecified) and product status (Active versus Obsolete).

Similar Substitute (Alternative Manufacturer): AOT280L from Alpha & Omega Semiconductor Inc. meets the 80V Vdss requirement and exceeds the 120A continuous drain current specification at case temperature (140A Tc). This part maintains compatible on-state resistance, gate charge, and operating temperature range within acceptable engineering tolerances for direct substitution in most applications.

Parameter Comparison

Parameter	FDP027N08B	FDP027N08B-F102	AOT280L	Unit
Manufacturer	onsemi	onsemi	Alpha & Omega Semiconductor Inc.	—
Product Status	Obsolete	Active	Active	—
Drain-to-Source Voltage (Vdss)	80	80	80	V
Continuous Drain Current (Id) @ 25°C	120 (Tc)	120 (Tc)	140 (Tc)	A
Rds On (Max) @ 10V	2.7 @ 100A	2.7 @ 100A	2.7 @ 20A	mOhm
Gate Threshold Voltage (Vgs(th) Max) @ 250µA	4.5	4.5	3.4	V
Gate Charge (Qg Max) @ 10V	178	178	224	nC
Power Dissipation (Max) @ Tc	246	246	333	W
Operating Temperature Range	-55 to 175	-55 to 175	-55 to 175	°C (TJ)
Package Type	TO-220-3	TO-220-3	TO-220-3	—
Input Capacitance (Ciss Max) @ 40V	13530	13530	11135	pF
RoHS Status	Not Specified	ROHS3 Compliant	ROHS3 Compliant	—
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	—

Engineering Selection Recommendations

FDP027N08B-F102 (Primary Substitute): This part is the recommended direct replacement for the obsolete FDP027N08B. Both parts share identical electrical specifications, the same base product number (FDP027), and compatible TO-220-3 packaging. FDP027N08B-F102 is currently in active production status with 15,500 units in stock. This part carries ROHS3 compliance certification, meeting modern regulatory requirements. The only operational difference is packaging format (Tube), which does not affect electrical performance or pin compatibility. This substitute provides the highest level of design continuity.

AOT280L (Alternative Substitute): The AOT280L from Alpha & Omega Semiconductor Inc. is an active substitute that exceeds the FDP027N08B specifications in continuous drain current (140A Tc versus 120A Tc) and power dissipation (333W Tc versus 246W Tc). This part maintains the 80V Vdss rating, compatible on-state resistance of 2.7mOhm, and identical operating temperature range. The AOT280L features a lower gate threshold voltage (3.4V versus 4.5V) and higher gate charge (224nC versus 178nC), which may require circuit evaluation for gate drive compatibility. This part is ROHS3 compliant and carries REACH Unaffected status. The AOT280L is suitable for applications where higher current capacity and thermal headroom are beneficial.

Both substitute parts maintain REACH Unaffected status and are compliant with current regulatory frameworks. Selection between FDP027N08B-F102 and AOT280L depends on design requirements for current capacity, thermal performance, and gate drive circuit specifications.

Frequently Asked Questions (FAQ)

Q: Can FDP027N08B-F102 be used as a direct replacement for FDP027N08B?

A: Yes. FDP027N08B-F102 is a direct electrical and mechanical equivalent. Both parts share identical Vdss (80V), continuous drain current (120A at Tc), on-state resistance (2.7mOhm @ 100A, 10V), gate threshold voltage (4.5V @ 250µA), and TO-220-3 packaging. The primary difference is product status (Active versus Obsolete) and packaging format (Tube). Pin configuration and electrical performance are identical.

Q: What are the key differences between FDP027N08B and AOT280L?

A: The AOT280L exceeds FDP027N08B specifications in continuous drain current (140A Tc versus 120A Tc) and power dissipation (333W Tc versus 246W Tc). Both maintain 80V Vdss and 2.7mOhm on-state resistance. The AOT280L has a lower gate threshold voltage (3.4V versus 4.5V) and higher gate charge (224nC versus 178nC). These differences require evaluation of gate drive circuit compatibility and thermal management in the application.

Q: Are all substitute parts available in TO-220-3 packaging?

A: Yes. FDP027N08B-F102 and AOT280L are both available in TO-220-3 through-hole packaging, maintaining mechanical compatibility with the original FDP027N08B footprint and mounting requirements.

Q: Do the substitute parts meet current regulatory compliance standards?

A: FDP027N08B-F102 and AOT280L are both ROHS3 compliant and carry REACH Unaffected status. Both parts meet current regulatory requirements for electronic component manufacturing and use.

Q: What is the inventory status of substitute parts?

A: FDP027N08B-F102 has 15,500 units in stock. AOT280L has 1,685 units in stock. Both parts are currently in active production and available for procurement.

Q: Can AOT280L be used in all applications designed for FDP027N08B?

A: AOT280L can be used in most applications, as it meets or exceeds the electrical specifications of FDP027N08B. However, the lower gate threshold voltage (3.4V versus 4.5V) and higher gate charge (224nC versus 178nC) require verification of gate drive circuit compatibility. Applications with marginal gate drive voltage or current capacity should be evaluated before substitution.

Q: What is the difference between the two onsemi part numbers?

A: FDP027N08B and FDP027N08B-F102 are electrically identical. FDP027N08B-F102 includes a manufacturing code suffix (-F102) and is supplied in Tube packaging. FDP027N08B-F102 is the active production variant, while FDP027N08B is obsolete. Both share the same base product number (FDP027) and PowerTrench® series designation.

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