FR2G-LTP Equivalent & Substitute Parts

Part Overview

The FR2G-LTP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 400 V DC reverse voltage and 2 A average rectified current in a DO-214AA (SMB) surface mount package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary to maintain design continuity, support existing production lines, and ensure component availability for legacy systems.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	2	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 2 A	V
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 400 V
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-50°C ~ 150°C	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the FR2G-LTP is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Current - Average Rectified (Io): 2 A minimum
Package / Case: DO-214AA or SMB compatible
Mounting Type: Surface Mount
Technology: Standard rectifier diode

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max) @ If: Must not exceed application requirements
Reverse Recovery Time (trr): Fast recovery characteristics (≤ 500 ns, > 200 mA)
Current - Reverse Leakage @ Vr: Must meet application leakage specifications
Operating Temperature Range: Must support -50°C to 150°C junction temperature range
RoHS and REACH Compliance: ROHS3 Compliant status required

Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical specifications) and Compatible Substitutes (higher ratings within the same package and technology class).

Parameter Comparison

Parameter	FR2G-LTP (Micro Commercial Co)	FR2G (SMC Diode Solutions)	FR2G_R1_00001 (Panjit International Inc.)	ES2G (YAGEO)	STTH3R04U (STMicroelectronics)
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	2 A	2 A	2 A	Not specified	3 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 2 A	1.3 V @ 2 A	1.3 V @ 2 A	1.3 V	1.5 V @ 3 A
Reverse Recovery Time (trr)	150 ns	150 ns	150 ns	Not specified	35 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V	5 µA @ 400 V	1 µA @ 400 V	Not specified	5 µA @ 400 V
Capacitance @ Vr, F	50 pF @ 4V, 1MHz	50 pF @ 4V, 1MHz	40 pF @ 4V, 1MHz	Not specified	Not specified
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA	DO-214AA, SMB
Operating Temperature - Junction	-50°C ~ 150°C	-50°C ~ 150°C	-50°C ~ 150°C	Not specified	175°C (Max)
Product Status	Not For New Designs	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Parametric Equivalents (Direct Substitutes):

The FR2G (SMC Diode Solutions) and FR2G_R1_00001 (Panjit International Inc.) are parametric equivalents to the FR2G-LTP. Both parts maintain identical voltage, current, and forward voltage specifications. Both manufacturers hold Active product status, ensuring long-term availability and supply chain stability. Both parts are ROHS3 Compliant and suitable for new designs, addressing the obsolescence concern of the original FR2G-LTP.

The FR2G_R1_00001 variant offers improved reverse leakage performance (1 µA versus 5 µA @ 400 V) and lower junction capacitance (40 pF versus 50 pF @ 4V, 1MHz), making it suitable for applications requiring lower leakage or reduced parasitic effects.

Compatible Substitute (Higher Current Rating):

The STTH3R04U (STMicroelectronics) is a compatible substitute with a higher current rating of 3 A versus 2 A. This part maintains the 400 V reverse voltage specification and DO-214AA/SMB package compatibility. The STTH3R04U features superior reverse recovery time (35 ns versus 150 ns), enabling faster switching performance. The maximum junction temperature rating of 175°C exceeds the FR2G-LTP specification of 150°C. This part is suitable for applications requiring higher current capacity or improved thermal performance within the same package footprint.

Parametric Equivalent (Limited Data):

The ES2G (YAGEO) is listed as a parametric equivalent with 400 V reverse voltage and 1.3 V forward voltage specifications. Complete electrical specifications are not provided in the available data. This part is ROHS3 Compliant and Active status. Verification of current rating and other critical parameters is required before selection.

All substitute parts are ROHS3 Compliant and maintain compatibility with the DO-214AA/SMB surface mount package, ensuring PCB layout and assembly process continuity.

Frequently Asked Questions (FAQ)

Q: Can the FR2G (SMC Diode Solutions) directly replace the FR2G-LTP in existing designs?

A: Yes. The FR2G is a parametric equivalent with identical voltage (400 V), current (2 A), forward voltage (1.3 V @ 2 A), and reverse recovery time (150 ns) specifications. Both parts use the DO-214AA/SMB package and surface mount technology. The FR2G holds Active product status, ensuring availability for production and new designs.

Q: What is the difference between the FR2G and FR2G_R1_00001?

A: Both parts are parametric equivalents with identical primary specifications (400 V, 2 A, 1.3 V @ 2 A). The FR2G_R1_00001 (Panjit International Inc.) offers lower reverse leakage current (1 µA versus 5 µA @ 400 V) and reduced junction capacitance (40 pF versus 50 pF @ 4V, 1MHz). Selection depends on application requirements for leakage and parasitic capacitance performance.

Q: Can the STTH3R04U replace the FR2G-LTP in all applications?

A: The STTH3R04U is a compatible substitute with higher current capacity (3 A versus 2 A) and faster reverse recovery (35 ns versus 150 ns). It maintains 400 V reverse voltage and DO-214AA/SMB package compatibility. Applications designed for 2 A operation will function with the STTH3R04U. However, the higher forward voltage (1.5 V @ 3 A versus 1.3 V @ 2 A) and faster switching characteristics may affect power dissipation and EMI performance. Circuit validation is required for applications with tight thermal or EMI constraints.

Q: Are all substitute parts RoHS and REACH compliant?

A: All substitute parts listed are ROHS3 Compliant. The FR2G (SMC Diode Solutions) is REACH Affected. The FR2G-LTP, FR2G_R1_00001, ES2G, and STTH3R04U are REACH Unaffected. Compliance requirements depend on end-use application and regional regulations.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel (TR) packaging is supplied on continuous reels for automated pick-and-place assembly. Cut Tape (CT) packaging is supplied in shorter tape segments. Both packaging formats contain the same component in the same DO-214AA/SMB package. Selection depends on production volume and assembly equipment compatibility. The STTH3R04U is available in Cut Tape (CT) & Digi-Reel® format, while FR2G and FR2G_R1_00001 are supplied in Tape & Reel (TR) format.

Q: What inventory levels are available for each substitute part?

A: FR2G (SMC Diode Solutions): 2000 Pcs. FR2G_R1_00001 (Panjit International Inc.): 1693 Pcs. ES2G (YAGEO): 29200 Pcs. STTH3R04U (STMicroelectronics): 10400 Pcs. Inventory levels support production requirements across all substitute options.

Q: Which substitute part should be selected for new designs?

A: For new designs requiring direct electrical equivalence to the FR2G-LTP, the FR2G (SMC Diode Solutions) or FR2G_R1_00001 (Panjit International Inc.) are recommended. Both parts hold Active product status and are suitable for new designs. The FR2G_R1_00001 offers improved leakage performance. For applications requiring higher current capacity or improved thermal performance, the STTH3R04U is suitable, subject to circuit validation for forward voltage and switching speed differences.

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