FCD1300N80Z Equivalent & Substitute Parts

Part Overview

The FCD1300N80Z is an N-Channel 800V 4A MOSFET manufactured by onsemi in the SuperFET® II series, housed in a TO-252AA (DPAK) surface mount package. This device is classified as "Not For New Designs," indicating it has reached end-of-life status within onsemi's product portfolio. The part delivers 52W maximum power dissipation and operates across a temperature range of -55°C to 150°C. Due to its discontinued design status, equivalent and substitute parts from active product lines are necessary for ongoing production requirements, maintenance applications, and design continuity.

Key Parameters

Parameter	Value	Unit
Drain to Source Voltage (Vdss)	800	V
Continuous Drain Current (Id) @ 25°C	4	A
On-State Resistance (Rds On) @ 2A, 10V	1.3	Ω
Gate Threshold Voltage (Vgs(th)) @ 400µA	4.5	V
Gate Charge (Qg) @ 10V	21	nC
Input Capacitance (Ciss) @ 100V	880	pF
Power Dissipation (Max)	52	W
Operating Temperature Range	-55 to 150	°C
Package Type	TO-252-3 (DPAK)	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the FCD1300N80Z is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Drain to Source Voltage (Vdss): Minimum 800V required for direct substitution; lower voltage ratings (700V, 650V, 620V) represent voltage-derated alternatives
Continuous Drain Current (Id): Minimum 4A at 25°C required; higher current ratings provide design margin
On-State Resistance (Rds On): Maximum 1.3Ω at specified conditions; lower values improve efficiency
Package Type: TO-252-3 (DPAK) surface mount configuration mandatory for mechanical compatibility
Gate Threshold Voltage (Vgs(th)): Range 3.5V to 4.5V acceptable for gate drive compatibility
Operating Temperature: Minimum -55°C to 150°C range required for thermal compatibility

Substitution Categories:

Category 1 – Direct Voltage Equivalents (800V): Parts maintaining 800V Vdss rating with comparable current and Rds On specifications. These provide pin-for-pin and functional equivalence.

Category 2 – Voltage-Derated Alternatives (700V, 650V, 620V): Parts with reduced Vdss ratings but equivalent or superior current handling and Rds On characteristics. These are suitable for applications where maximum system voltage is below the original 800V specification.

Category 3 – Active Product Status: Preference given to parts with "Active" product status over "Not For New Designs" classifications, ensuring long-term availability and supply chain stability.

Parameter Comparison

Parameter	FCD1300N80Z (Main)	STD6N65M2	IPD70R1K4P7SAUMA1	IPD70R1K4CEAUMA1	R8003KND3TL1	STD5N62K3
Manufacturer	onsemi	STMicroelectronics	Infineon Technologies	Infineon Technologies	Rohm Semiconductor	STMicroelectronics
Vdss (V)	800	650	700	700	800	620
Id @ 25°C (A)	4	4	4	5.4	3	4.2
Rds On (Ω)	1.3 @ 2A, 10V	1.35 @ 2A, 10V	1.4 @ 700mA, 10V	1.4 @ 1A, 10V	1.8 @ 1.5A, 10V	1.6 @ 2.1A, 10V
Vgs(th) (V)	4.5 @ 400µA	4 @ 250µA	3.5 @ 40µA	3.5 @ 130µA	4.5 @ 2mA	4.5 @ 50µA
Qg @ 10V (nC)	21	9.8	4.7	10.5	11.5	26
Ciss @ 100V (pF)	880	226	158	225	300	680
Power Dissipation (W)	52	60	23	53	45	70
Operating Temp (°C)	-55 to 150	-55 to 150	-40 to 150	-40 to 150	to 150	-55 to 150
Package	TO-252-3 (DPAK)	TO-252-3 (DPAK)	TO-252-3 (DPAK)	TO-252-3 (DPAK)	TO-252-3 (DPAK)	TO-252-3 (DPAK)
Product Status	Not For New Designs	Active	Active	Not For New Designs	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Recommended Primary Substitute: R8003KND3TL1 (Rohm Semiconductor)

The R8003KND3TL1 maintains the 800V Vdss rating of the FCD1300N80Z, ensuring direct voltage compatibility. With 3A continuous drain current and 1.8Ω Rds On, it provides functional equivalence for applications operating at or below 4A. The part carries "Active" product status, ensuring long-term availability. RoHS3 compliance and unlimited moisture sensitivity level (MSL 1) match the original device specifications. This part is suitable for direct replacement in existing designs without circuit modification.

Recommended Secondary Substitute: STD6N65M2 (STMicroelectronics)

The STD6N65M2 operates at 650V Vdss with 4A continuous drain current and 1.35Ω Rds On, providing superior on-state resistance performance. The "Active" product status guarantees supply chain continuity. This part is applicable to applications where system voltage does not exceed 650V, offering improved efficiency characteristics. RoHS3 compliance and MSL 1 rating ensure environmental and handling compatibility.

Recommended Tertiary Substitute: STD5N62K3 (STMicroelectronics)

The STD5N62K3 operates at 620V Vdss with 4.2A continuous drain current and 1.6Ω Rds On. The "Active" product status and extensive inventory (41,550 pcs) provide supply assurance. This part is suitable for applications with maximum system voltage below 620V. The higher power dissipation rating (70W) accommodates thermal margin in demanding applications.

Alternative Consideration: IPD70R1K4P7SAUMA1 (Infineon Technologies)

The IPD70R1K4P7SAUMA1 operates at 700V Vdss with 4A continuous drain current and 1.4Ω Rds On. This part carries "Active" product status and maintains the largest inventory (100,100 pcs), ensuring exceptional availability. The CoolMOS™ P7 series technology delivers significantly lower gate charge (4.7 nC) and input capacitance (158 pF), reducing switching losses in high-frequency applications. This part is suitable for applications with maximum system voltage below 700V and where switching efficiency is a design priority.

Not Recommended: IPD70R1K4CEAUMA1 (Infineon Technologies)

Although this part offers 700V Vdss and 5.4A continuous drain current with superior current handling, it carries "Not For New Designs" product status, matching the obsolescence classification of the original FCD1300N80Z. This status disqualifies it as a long-term substitute solution.

Frequently Asked Questions (FAQ)

Q1: Can the R8003KND3TL1 be used as a direct replacement for the FCD1300N80Z?

A: Yes. Both devices maintain 800V Vdss rating, 4A continuous drain current capability, and TO-252-3 (DPAK) package configuration. The R8003KND3TL1 provides functional and mechanical compatibility. The slightly higher Rds On (1.8Ω versus 1.3Ω) results in marginally increased conduction losses but remains within acceptable design tolerances for most applications.

Q2: Why are voltage-derated alternatives (650V, 700V, 620V) listed as substitutes for an 800V device?

A: Voltage-derated alternatives are applicable when the actual system voltage operates below the original 800V specification. Many applications operate at 400V, 480V, or 600V bus voltages. For these systems, lower-voltage MOSFETs provide superior on-state resistance and reduced gate charge, improving efficiency without compromising safety margins. Substitution requires verification that the application's maximum voltage does not exceed the substitute part's Vdss rating.

Q3: What is the significance of "Active" versus "Not For New Designs" product status?

A: "Active" status indicates the manufacturer continues production, maintains supply chain support, and provides long-term availability. "Not For New Designs" status signals end-of-life classification, with limited production runs and eventual discontinuation. For production applications requiring multi-year component availability, "Active" status parts are strongly preferred.

Q4: How does gate charge (Qg) affect substitute selection?

A: Gate charge determines the energy required to switch the MOSFET on and off. Lower gate charge reduces switching losses and allows faster switching frequencies. The IPD70R1K4P7SAUMA1 (4.7 nC) exhibits significantly lower gate charge than the FCD1300N80Z (21 nC), making it advantageous for high-frequency switching applications. However, gate drive circuits must supply sufficient current to charge the gate within the required switching time window.

Q5: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 Compliant certification, matching the environmental compliance status of the FCD1300N80Z. This ensures compatibility with regulatory requirements and customer specifications.

Q6: What is the impact of different Rds On values on circuit performance?

A: On-state resistance directly affects conduction losses through the relationship P = I²Rds. Lower Rds On reduces power dissipation and heat generation. The STD6N65M2 (1.35Ω) and IPD70R1K4P7SAUMA1 (1.4Ω) provide improved efficiency compared to the original FCD1300N80Z (1.3Ω) and R8003KND3TL1 (1.8Ω). Thermal design calculations must account for these differences when substituting parts.

Q7: Can the IPD70R1K4CEAUMA1 be used despite "Not For New Designs" status?

A: While the IPD70R1K4CEAUMA1 offers superior current handling (5.4A) and comparable voltage rating (700V), its "Not For New Designs" status creates long-term supply risk. Current inventory (1,361 pcs) provides short-term availability, but future procurement becomes uncertain. This part is suitable only for legacy system maintenance where no alternative exists.

Q8: What package considerations apply to these substitutes?

A: All substitute parts use the TO-252-3 (DPAK) surface mount package, providing mechanical and thermal interface compatibility with the FCD1300N80Z. PCB layout, thermal vias, and heatsink mounting remain unchanged. No board redesign is required for package compatibility.

Q9: How should operating temperature range differences be evaluated?

A: The FCD1300N80Z specifies -55°C to 150°C operating range. The IPD70R1K4P7SAUMA1 and IPD70R1K4CEAUMA1 specify -40°C to 150°C, providing reduced low-temperature capability. For applications requiring operation below -40°C, the R8003KND3TL1, STD6N65M2, or STD5N62K3 are required to maintain full temperature range compatibility.

Q10: What is the moisture sensitivity level (MSL) and why does it matter?

A: MSL indicates the maximum time a component can be exposed to ambient humidity before soldering without baking. MSL 1 (unlimited) allows indefinite storage without moisture control. MSL 3 (168 hours) requires baking before soldering if storage exceeds 168 hours in high-humidity environments. The FCD1300N80Z and most recommended substitutes carry MSL 1, eliminating moisture management complexity. The Infineon parts (IPD70R1K4P7SAUMA1, IPD70R1K4CEAUMA1) carry MSL 3, requiring moisture control procedures.

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