FR204-AP Equivalent & Substitute Parts

Part Overview

The FR204-AP is a general-purpose rectifier diode rated for 400 V DC reverse voltage and 2 A average rectified current in a DO-15 through-hole package. Manufactured by Micro Commercial Co, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts maintain the core electrical specifications while offering active product status and improved availability.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 2 A
Speed Classification	Fast Recovery ≤ 500 ns, > 200 mA (Io)
Reverse Recovery Time (trr)	150 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V
Mounting Type	Through Hole
Package / Case	DO-204AC, DO-15, Axial
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the FR204-AP are grouped based on strict electrical and mechanical parameter compatibility. All substitute parts maintain the following core specifications:

Critical Parameters for Substitution:

Voltage - DC Reverse (Vr) (Max): 400 V
Current - Average Rectified (Io): 2 A
Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 2 A
Speed Classification: Fast Recovery ≤ 500 ns, > 200 mA (Io)
Mounting Type: Through Hole
Package / Case: DO-204AC, DO-15, Axial
Operating Temperature - Junction: -55°C ~ 150°C
RoHS Status: ROHS3 Compliant

Allowable Parameter Variations:

Reverse Recovery Time (trr): 35 ns to 150 ns (faster recovery times are acceptable)
Current - Reverse Leakage @ Vr: 1 µA to 5 µA @ 400 V (lower leakage is acceptable)
Capacitance @ Vr, F: 10 pF to 50 pF @ 4 V, 1 MHz (variations within this range are acceptable)

Substitute parts are classified as direct equivalents when all critical parameters match exactly. Parametric equivalents maintain all critical electrical specifications but may differ in reverse recovery time, leakage current, or capacitance within acceptable ranges. All substitute parts are active products with ROHS3 compliance.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vr (Max)	Io	Vf (Max) @ If	trr (ns)	Reverse Leakage @ Vr	Capacitance @ Vr, F	Package	Inventory
FR204-AP	Micro Commercial Co	Obsolete	400 V	2 A	1.3 V @ 2 A	150	5 µA @ 400 V	40 pF @ 4 V, 1 MHz	DO-15	1101 Pcs
FR204GP-AP	Micro Commercial Co	Active	400 V	2 A	1.3 V @ 2 A	150	5 µA @ 400 V	40 pF @ 4 V, 1 MHz	DO-15	767 Pcs
HER205G-AP	Micro Commercial Co	Active	400 V	2 A	1.3 V @ 2 A	50	5 µA @ 400 V	50 pF @ 4 V, 1 MHz	DO-15	1131 Pcs
FR204G B0G	Taiwan Semiconductor Corporation	Active	400 V	2 A	1.3 V @ 2 A	150	5 µA @ 400 V	10 pF @ 4 V, 1 MHz	DO-204AC (DO-15)	1063 Pcs
FR204G	Taiwan Semiconductor Corporation	Active	400 V	2 A	1.3 V @ 2 A	150	5 µA @ 400 V	10 pF @ 4 V, 1 MHz	DO-204AC (DO-15)	777 Pcs
FR204G A0G	Taiwan Semiconductor Corporation	Active	400 V	2 A	1.3 V @ 2 A	150	5 µA @ 400 V	10 pF @ 4 V, 1 MHz	DO-204AC (DO-15)	702 Pcs
FR204GB-G	Comchip Technology	Active	400 V	2 A	1.3 V @ 2 A	150	5 µA @ 400 V	Not specified	DO-15	1013 Pcs
HER205G A0G	Taiwan Semiconductor Corporation	Active	400 V	2 A	1.3 V @ 2 A	50	5 µA @ 400 V	35 pF @ 4 V, 1 MHz	DO-204AC (DO-15)	844 Pcs
SF26G A0G	Taiwan Semiconductor Corporation	Active	400 V	2 A	1.3 V @ 2 A	35	5 µA @ 400 V	20 pF @ 4 V, 1 MHz	DO-204AC (DO-15)	831 Pcs
SF26GHA0G	Taiwan Semiconductor Corporation	Active	400 V	2 A	1.3 V @ 2 A	35	5 µA @ 400 V	20 pF @ 4 V, 1 MHz	DO-204AC (DO-15)	709 Pcs
SF2L6G A0G	Taiwan Semiconductor Corporation	Active	400 V	2 A	1.3 V @ 2 A	35	1 µA @ 400 V	20 pF @ 4 V, 1 MHz	DO-204AC (DO-15)	688 Pcs

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Specifications):

FR204GP-AP is the direct replacement for FR204-AP. Both parts are manufactured by Micro Commercial Co and share identical electrical parameters including reverse recovery time of 150 ns and capacitance of 40 pF. FR204GP-AP is active and available in inventory. This part is suitable for direct substitution without circuit redesign.

Parametric Equivalents with Improved Performance:

HER205G-AP, HER205G A0G, SF26G A0G, SF26GHA0G, and SF2L6G A0G are parametric equivalents that maintain all critical electrical specifications while offering faster reverse recovery times (50 ns or 35 ns versus 150 ns). These parts are manufactured by Micro Commercial Co or Taiwan Semiconductor Corporation and are active products with ROHS3 compliance. Faster reverse recovery times result in reduced switching losses and improved efficiency in rectification circuits. SF2L6G A0G additionally provides lower reverse leakage current (1 µA versus 5 µA).

Equivalent Parts with Acceptable Parameter Variations:

FR204G B0G, FR204G, and FR204G A0G are manufactured by Taiwan Semiconductor Corporation and maintain identical electrical specifications to FR204-AP with the exception of reduced capacitance (10 pF versus 40 pF). These parts are active and available. The reduced capacitance may provide improved high-frequency performance in certain applications.

Alternative Equivalent:

FR204GB-G is manufactured by Comchip Technology and maintains all critical electrical specifications. This part is active and available in inventory.

All substitute parts listed maintain the required 400 V reverse voltage rating, 2 A average rectified current, 1.3 V forward voltage at 2 A, through-hole mounting, DO-15 or DO-204AC package compatibility, -55°C to 150°C operating temperature range, and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can FR204GP-AP be used as a direct replacement for FR204-AP?

A: Yes. FR204GP-AP is manufactured by the same company (Micro Commercial Co) and shares identical electrical specifications including voltage rating, current rating, forward voltage, and reverse recovery time. The part is active and available in inventory.

Q: What is the difference between FR204-AP and the HER205G series?

A: Both maintain the same 400 V voltage rating and 2 A current rating. The HER205G series offers faster reverse recovery time (50 ns versus 150 ns), which reduces switching losses. HER205G-AP is packaged in Tape & Box format, while HER205G A0G uses DO-204AC (DO-15) packaging. Both are active products.

Q: Are SF26G A0G and SF2L6G A0G interchangeable?

A: Both parts maintain identical voltage and current ratings and share the same fast reverse recovery time of 35 ns. The primary difference is reverse leakage current: SF2L6G A0G provides lower leakage (1 µA versus 5 µA at 400 V). Both are packaged in DO-204AC (DO-15) format and are active products.

Q: What does the faster reverse recovery time in HER205G and SF26G series mean for circuit performance?

A: Faster reverse recovery time (50 ns or 35 ns versus 150 ns) reduces the time the diode conducts in the reverse direction during switching transitions. This results in lower switching losses, reduced electromagnetic interference, and improved efficiency in rectification and power conversion circuits.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance, matching the compliance status of the original FR204-AP.

Q: What is the difference between DO-15 and DO-204AC packaging?

A: DO-15 and DO-204AC are equivalent package designations for the same axial through-hole diode package. Both refer to the same physical form factor and pin configuration. Parts specified as DO-204AC (DO-15) or DO-15 are mechanically and electrically compatible.

Q: Can I use SF26GHA0G in automotive applications?

A: SF26GHA0G is qualified to AEC-Q101 automotive standard and carries automotive grade designation. It is suitable for automotive applications requiring this qualification. Other parts in the substitute list do not carry automotive qualification.

Q: Why do some substitute parts have lower capacitance values?

A: Capacitance variations (10 pF to 50 pF at 4 V, 1 MHz) are within acceptable ranges for rectifier diode substitution. Lower capacitance values may provide improved performance at higher frequencies by reducing parasitic effects, while higher capacitance values may be preferred in applications requiring specific frequency response characteristics.

Q: Is inventory availability a factor in part selection?

A: Inventory levels are provided for reference. HER205G-AP (1131 Pcs), FR204G B0G (1063 Pcs), and FR204GB-G (1013 Pcs) show the highest current inventory levels among substitute parts.

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