FDB2572 Equivalent & Substitute Parts Reference

Part Overview

The FDB2572, manufactured by onsemi, is an N-Channel MOSFET with a drain-to-source voltage rating of 150 V and a continuous drain current rating of 4A (Ta) / 29A (Tc). It features a low Rds(on), high power dissipation, and a TO-263 (D2PAK) surface mount package. This MOSFET is classified under Transistors, FETs, MOSFETs and is currently listed as Active. The need for alternative models can arise due to lifecycle changes, supply chain continuity, or design constraints requiring form, fit, or parametric compatibility.

Key Parameters

Parameter	FDB2572
Manufacturer	onsemi
Category	Transistors, FETs, MOSFETs
FET Type	N-Channel
Drain to Source Voltage (Vdss)	150 V
Current - Continuous Drain (Id) @ 25°C	4A (Ta), 29A (Tc)
Drive Voltage (Max Rds On, Min Rds On)	6V, 10V
Rds On (Max) @ Id, Vgs	54mOhm @ 9A, 10V
Vgs(th) (Max) @ Id	4V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	34 nC @ 10 V
Vgs (Max)	±20V
Input Capacitance (Ciss) (Max) @ Vds	1770 pF @ 25 V
Power Dissipation (Max)	135W (Tc)
Operating Temperature	-55°C ~ 175°C (TJ)
Mounting Type	Surface Mount
Supplier Device Package	TO-263 (D2PAK)
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
RoHS Status	ROHS3 Compliant
MSL	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for FDB2572 are grouped by direct listing as alternatives and by matching parametric compatibility within the same category and package type. The allowed substitution is determined exclusively by the following key parameters: manufacturer, MOSFET category, N-Channel FET type, drain-to-source voltage (Vdss), current rating (Id), drive voltage, Rds(on), gate threshold voltage (Vgs(th)), gate charge (Qg), maximum Vgs, input capacitance (Ciss), power dissipation, operating temperature, mounting type, package/case, and compliance certifications.

Parameter Comparison

Parameter	FDB2572	NTB35N15T4G
Manufacturer	onsemi	onsemi
Category	Transistors, FETs, MOSFETs	Transistors, FETs, MOSFETs
FET Type	N-Channel	N-Channel
Drain to Source Voltage (Vdss)	150 V	150 V
Current - Continuous Drain (Id) @ 25°C	4A (Ta), 29A (Tc)	37A (Ta)
Drive Voltage (Max Rds On, Min Rds On)	6V, 10V	10V
Rds On (Max) @ Id, Vgs	54mOhm @ 9A, 10V	50mOhm @ 18.5A, 10V
Vgs(th) (Max) @ Id	4V @ 250µA	4V @ 250µA
Gate Charge (Qg) (Max) @ Vgs	34 nC @ 10 V	100 nC @ 10 V
Vgs (Max)	±20V	±20V
Input Capacitance (Ciss) (Max) @ Vds	1770 pF @ 25 V	3200 pF @ 25 V
Power Dissipation (Max)	135W (Tc)	2W (Ta), 178W (Tj)
Operating Temperature	-55°C ~ 175°C (TJ)	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount	Surface Mount
Supplier Device Package	TO-263 (D2PAK)	D2PAK
Package / Case	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB	TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

FDB2572 is listed as Active and meets all compliance criteria, including ROHS3 and REACH status, with an unlimited moisture sensitivity level (MSL 1). NTB35N15T4G is listed as Obsolete, although it fulfills regulatory and environmental requirements. Selection should be determined based on whether an active or obsolete lifecycle status is permitted for the intended application, alongside supplied certifications.

Frequently Asked Questions (FAQ)

Q1: What are the primary criteria for substituting FDB2572 in a design?
A1: Substitution is determined by matching manufacturer, FET type, drainage-source voltage, current ratings, Rds(on), gate threshold, gate charge, voltage ratings, package/case, mounting type, and regulatory compliance.

Q2: Does the package type affect substitution compatibility?
A2: Yes. FDB2572 and NTB35N15T4G share the TO-263/D2PAK package, which is suitable for surface mount configurations.

Q3: Are both FDB2572 and NTB35N15T4G compliant with RoHS and REACH standards?
A3: Yes. Both parts are ROHS3 compliant and REACH unaffected.

Q4: How does product status influence substitute part selection?
A4: FDB2572 is Active, while NTB35N15T4G is Obsolete. Preference is given to active parts for new designs and long-term availability requirements.

Q5: Are parametric differences allowed in substitution?
A5: Substitution is allowed only when all specified electrical and mechanical parameters are compatible. All listed substitute relationships are strictly based on provided values.

Q6: Can moisture sensitivity (MSL) levels impact selection?
A6: Both parts have MSL 1 (Unlimited), which ensures no restriction for reflow or general PCB assembly processes.

Q7: Is supplier device package naming relevant?
A7: Yes. Both FDB2572 and NTB35N15T4G are listed as TO-263 (D2PAK), confirming mechanical compatibility for substitution.

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