FDP8876 N-Channel MOSFET 30V 70A Equivalent & Substitute Parts

Part Overview

The FDP8876 is an N-Channel MOSFET manufactured by onsemi, rated for 30V drain-to-source voltage and 70A continuous drain current in a Through Hole TO-220-3 package. This device is part of the PowerTrench® series and is classified as Obsolete. Due to its obsolete status, equivalent substitute parts from active product lines are necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across critical parameters including voltage rating, current capacity, on-resistance characteristics, and thermal performance while accommodating the Through Hole TO-220-3 package form factor.

Key Parameters

Parameter	FDP8876 Value	Unit
Drain to Source Voltage (Vdss)	30	V
Continuous Drain Current (Id) @ 25°C	70	A (Tc)
On-Resistance (Rds On Max) @ 40A, 10V	8.7	mOhm
Gate Threshold Voltage (Vgs th Max) @ 250µA	2.5	V
Gate Charge (Qg Max) @ 10V	45	nC
Input Capacitance (Ciss Max) @ 15V	1700	pF
Power Dissipation (Max)	70	W (Tc)
Operating Temperature Range	-55 to 175	°C (TJ)
Package Type	TO-220-3	Through Hole
Moisture Sensitivity Level	1 (Unlimited)	MSL

Substitute Part Grouping Explanation

Substitution eligibility for the FDP8876 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Drain to Source Voltage (Vdss): Must equal or exceed 30V
FET Type: N-Channel MOSFET technology
Package: Through Hole TO-220-3 or TO-220AB (compatible footprint)
Operating Temperature Range: Must support -55°C to 175°C
Moisture Sensitivity Level: MSL 1 (Unlimited)

Performance Parameters for Substitution:

Continuous Drain Current (Id): Substitute must support minimum 70A at 25°C
On-Resistance (Rds On): Lower or equal values indicate improved performance
Gate Charge (Qg): Lower values reduce switching losses
Input Capacitance (Ciss): Affects gate drive requirements
Power Dissipation: Must support thermal requirements of the application

The substitute parts listed below meet all mandatory criteria and are available from active product lines or with improved specifications compared to the obsolete FDP8876.

Parameter Comparison

Parameter	FDP8876	IRL3803PBF	IRLB8721PBF	IRLB8748PBF	PSMN2R0-30PL,127	PSMN4R3-30PL,127	Unit
Manufacturer	onsemi	Infineon	Infineon	Infineon	Nexperia	Nexperia	—
Vdss	30	30	30	30	30	30	V
Id @ 25°C	70	140	62	92	100	100	A (Tc)
Rds On (Max) @ 10V	8.7 @ 40A	6 @ 71A	8.7 @ 31A	4.8 @ 40A	2.1 @ 15A	4.3 @ 15A	mOhm
Vgs(th) (Max) @ Id	2.5 @ 250µA	1 @ 250µA	2.35 @ 25µA	2.35 @ 50µA	2.15 @ 1mA	2.15 @ 1mA	V
Qg (Max) @ Vgs	45 @ 10V	140 @ 4.5V	13 @ 4.5V	23 @ 4.5V	117 @ 10V	41.5 @ 10V	nC
Ciss (Max) @ Vds	1700 @ 15V	5000 @ 25V	1077 @ 15V	2139 @ 15V	6810 @ 12V	2400 @ 12V	pF
Power Dissipation (Max)	70	200	65	75	211	103	W (Tc)
Operating Temp Range	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175	-55 to 175	°C (TJ)
Package	TO-220-3	TO-220AB	TO-220AB	TO-220AB	TO-220AB	TO-220AB	—
Product Status	Obsolete	Not For New Designs	Active	Active	Obsolete	Obsolete	—
RoHS Status	Not specified	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

For Active Production and New Designs:

The IRLB8748PBF and IRLB8721PBF from Infineon Technologies are the primary recommended substitutes. Both devices carry Active product status and ROHS3 compliance certification. The IRLB8748PBF provides superior performance with 92A continuous drain current, lower on-resistance (4.8 mOhm @ 40A, 10V), and improved thermal characteristics (75W power dissipation). The IRLB8721PBF offers a closer current rating match at 62A with equivalent on-resistance (8.7 mOhm @ 31A, 10V) and maintains the same operating temperature range as the FDP8876.

For Legacy System Maintenance:

The PSMN4R3-30PL,127 from Nexperia USA Inc. provides electrical compatibility with 100A continuous drain current and 4.3 mOhm on-resistance. Although classified as Obsolete, this part maintains ROHS3 compliance and adequate inventory availability (5596 pcs). The PSMN2R0-30PL,127 offers superior on-resistance performance (2.1 mOhm @ 15A, 10V) and higher power dissipation capability (211W) but carries higher gate charge (117 nC @ 10V).

Package Compatibility:

All substitute parts utilize the TO-220AB package, which is mechanically and electrically compatible with the TO-220-3 footprint of the FDP8876. Pin configuration remains consistent across all listed substitutes.

Compliance Considerations:

IRLB8748PBF and IRLB8721PBF carry ROHS3 Compliant certification, making them suitable for applications requiring environmental compliance. All substitute parts maintain MSL 1 (Unlimited) moisture sensitivity rating and REACH Unaffected status, matching the FDP8876 specifications.

Frequently Asked Questions (FAQ)

Q: Can the IRLB8748PBF directly replace the FDP8876 in existing designs?

A: Yes. The IRLB8748PBF meets all mandatory compatibility criteria: 30V Vdss rating, N-Channel MOSFET technology, Through Hole TO-220AB package (compatible with TO-220-3 footprint), and -55°C to 175°C operating temperature range. The device provides improved performance with 92A continuous drain current and lower on-resistance (4.8 mOhm @ 40A, 10V) compared to the FDP8876 (8.7 mOhm @ 40A, 10V).

Q: What is the difference between TO-220-3 and TO-220AB packages?

A: Both packages are Through Hole variants with identical pin configurations and mechanical compatibility. TO-220-3 and TO-220AB refer to the same physical form factor with three leads (Gate, Drain, Source). Devices in either package designation are interchangeable at the PCB level.

Q: Why is the IRLB8721PBF recommended despite lower current rating (62A vs. 70A)?

A: The IRLB8721PBF is recommended for applications where the FDP8876's 70A rating exceeds actual circuit requirements. At 62A continuous drain current, this device remains within acceptable operating margins for most designs. The IRLB8721PBF carries Active product status and ROHS3 compliance, ensuring long-term availability and regulatory compliance. For applications requiring the full 70A capacity, the IRLB8748PBF (92A) is the appropriate selection.

Q: Are there performance trade-offs when substituting the FDP8876?

A: Substitute parts generally offer improved or equivalent performance. The IRLB8748PBF provides lower on-resistance (4.8 mOhm vs. 8.7 mOhm), reducing conduction losses. The PSMN2R0-30PL,127 offers the lowest on-resistance (2.1 mOhm @ 15A, 10V) but carries higher gate charge (117 nC vs. 45 nC), requiring more gate drive power. Selection depends on specific application priorities: conduction loss minimization, switching speed, or thermal management.

Q: What is the significance of gate charge (Qg) differences among substitutes?

A: Gate charge determines the energy required to switch the MOSFET on and off. Lower gate charge (IRLB8721PBF at 13 nC @ 4.5V) reduces switching losses and allows faster switching frequencies. Higher gate charge (PSMN2R0-30PL,127 at 117 nC @ 10V) requires more robust gate drive circuitry but may provide improved noise immunity. The FDP8876 specifies 45 nC @ 10V, placing it in the mid-range of substitute options.

Q: Can obsolete substitute parts be used in new designs?

A: Obsolete parts (PSMN2R0-30PL,127, PSMN4R3-30PL,127) are not recommended for new designs due to uncertain long-term availability. These parts are suitable only for legacy system maintenance or repair where existing inventory is available. For new designs, Active status parts (IRLB8748PBF, IRLB8721PBF) are the appropriate selection.

Q: What inventory considerations apply to these substitutes?

A: IRLB8748PBF maintains the highest inventory availability (26,100 pcs), followed by IRLB8721PBF (15,465 pcs). PSMN2R0-30PL,127 and PSMN4R3-30PL,127 have lower availability (10,198 pcs and 5,596 pcs respectively) and obsolete status. IRL3803PBF carries "Not For New Designs" status with 10,080 pcs available. For production planning, IRLB8748PBF and IRLB8721PBF offer the most reliable supply continuity.

Q: How do input capacitance (Ciss) differences affect circuit design?

A: Input capacitance affects gate drive circuit design and switching speed. Lower Ciss values (IRLB8721PBF at 1077 pF @ 15V) require less gate drive current and enable faster switching. Higher Ciss values (PSMN2R0-30PL,127 at 6810 pF @ 12V) demand more robust gate drive circuits but may reduce susceptibility to parasitic oscillations. The FDP8876 specifies 1700 pF @ 15V. Gate drive circuit verification is recommended when substituting parts with significantly different Ciss values.

Q: Are all substitute parts REACH compliant?

A: Yes. All listed substitute parts carry REACH Unaffected status, matching the FDP8876 specification. This designation confirms compliance with REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) regulations applicable to electronic components.

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