S2G-LTP Equivalent & Substitute Parts

Part Overview

The S2G-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 surface mount DO-214AA (SMB) 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	1.15	V @ 2 A
Speed	Standard Recovery >500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	5	µA @ 400 V
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
Technology	Standard	—

Substitute Part Grouping Explanation

Substitution of the S2G-LTP is determined by strict equivalence in the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Current - Average Rectified (Io): 2 A minimum
Package / Case: DO-214AA, SMB (physical and electrical compatibility)
Mounting Type: Surface Mount
Operating Temperature Range: Must encompass or exceed -55°C to 150°C

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max) @ If: 1.15 V @ 2 A or lower (lower forward voltage indicates improved efficiency)
Speed: Standard Recovery classification (>500ns, > 200mA)
Technology: Standard rectifier diode technology

Parts that meet all primary criteria are classified as direct substitutes. Parts that meet primary criteria but differ in secondary factors (such as forward voltage, reverse leakage, or recovery time) are classified as parametric equivalents and require circuit-level evaluation.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	Package	Product Status
S2G-LTP	Micro Commercial Co	400	2	1.15 @ 2 A	Standard Recovery >500ns	DO-214AA, SMB	Not For New Designs
CMR2U-04 TR13 PBFREE	Central Semiconductor Corp	400	2	1.4 @ 2 A	Fast Recovery ≤500ns	DO-214AA, SMB	Active
MRS1504T3G	onsemi	400	1.5	1.04 @ 1.5 A	Standard Recovery >500ns	DO-214AA, SMB	Not For New Designs
S2G	Diotec Semiconductor	400	2	1.15 @ 2 A	Standard Recovery >500ns	DO-214AA, SMB	Active
S2G R5G	Taiwan Semiconductor Corporation	400	2	1.15 @ 2 A	Standard Recovery >500ns	DO-214AA, SMB	Discontinued at DiGi Electronics
S2GH	Taiwan Semiconductor Corporation	400	2	1.15 @ 2 A	Standard Recovery >500ns	DO-214AA, SMB	Active
S2G-M3/52T	Vishay General Semiconductor - Diodes Division	400	1.5	1.15 @ 1.5 A	Standard Recovery >500ns	DO-214AA, SMB	Active
SB2G-M3/5BT	Vishay General Semiconductor - Diodes Division	400	2	1.15 @ 2 A	Standard Recovery >500ns	DO-214AA, SMB	Active

Engineering Selection Recommendations

Direct Substitutes (Recommended for Replacement):

The following parts satisfy all primary substitution criteria and are recommended as direct replacements for the S2G-LTP:

S2G (Diotec Semiconductor): Matches all electrical parameters (400 V, 2 A, 1.15 V forward voltage, standard recovery). Active product status. ROHS3 compliant. Identical operating temperature range (-55°C to 150°C). Suitable for immediate substitution in existing designs.
S2GH (Taiwan Semiconductor Corporation): Matches all electrical parameters (400 V, 2 A, 1.15 V forward voltage, standard recovery). Active product status. ROHS3 compliant. Includes AEC-Q101 automotive qualification. Suitable for applications requiring automotive-grade reliability.
SB2G-M3/5BT (Vishay General Semiconductor - Diodes Division): Matches all electrical parameters (400 V, 2 A, 1.15 V forward voltage, standard recovery). Active product status. ROHS3 compliant. Identical operating temperature range. Suitable for direct substitution.

Parametric Equivalents (Conditional Substitution):

The following parts meet primary voltage and package criteria but differ in current rating or other secondary parameters:

S2G-M3/52T (Vishay General Semiconductor - Diodes Division): Rated for 1.5 A average rectified current (lower than S2G-LTP 2 A rating). Matches 400 V reverse voltage and DO-214AA package. Active product status. ROHS3 compliant. Suitable only for applications where circuit current demand does not exceed 1.5 A.
MRS1504T3G (onsemi): Rated for 1.5 A average rectified current (lower than S2G-LTP 2 A rating). Matches 400 V reverse voltage and DO-214AA package. Not For New Designs status. Suitable only for applications where circuit current demand does not exceed 1.5 A.

Alternative with Modified Characteristics:

CMR2U-04 TR13 PBFREE (Central Semiconductor Corp): Matches 400 V reverse voltage and 2 A current rating. Classified as Fast Recovery (≤500ns) versus Standard Recovery (>500ns) for S2G-LTP. Forward voltage is 1.4 V @ 2 A (higher than S2G-LTP 1.15 V). Active product status. ROHS3 compliant. Suitable for substitution where fast recovery characteristics are acceptable or beneficial, with awareness of increased forward voltage drop.

Discontinued or Limited Availability:

S2G R5G (Taiwan Semiconductor Corporation): Matches all electrical parameters (400 V, 2 A, 1.15 V forward voltage, standard recovery). Discontinued at DiGi Electronics. Use only if existing inventory is available and long-term supply is not required.

Frequently Asked Questions (FAQ)

Q: Can I use the MRS1504T3G as a direct replacement for the S2G-LTP?

A: The MRS1504T3G is not a direct replacement. While it shares the same 400 V reverse voltage rating and DO-214AA package, it is rated for 1.5 A average rectified current, compared to the S2G-LTP's 2 A rating. It is suitable only if your circuit operates at 1.5 A or below. For circuits requiring the full 2 A capability, use S2G, S2GH, or SB2G-M3/5BT instead.

Q: What is the difference between Standard Recovery and Fast Recovery diodes?

A: Standard Recovery diodes have reverse recovery times greater than 500 ns, while Fast Recovery diodes have reverse recovery times of 500 ns or less. The S2G-LTP is a Standard Recovery device. The CMR2U-04 TR13 PBFREE is a Fast Recovery device. Fast Recovery diodes switch more quickly but may introduce different electromagnetic characteristics. Substitution between these types requires circuit-level evaluation.

Q: Is the S2GH suitable for automotive applications?

A: Yes. The S2GH carries AEC-Q101 automotive qualification and is rated for automotive-grade reliability. It matches all electrical parameters of the S2G-LTP and is suitable for automotive applications requiring qualified components.

Q: Why does the CMR2U-04 TR13 PBFREE have a higher forward voltage (1.4 V) than the S2G-LTP (1.15 V)?

A: Forward voltage variation is a characteristic difference between different diode designs and manufacturing processes. The CMR2U-04 TR13 PBFREE's higher forward voltage (1.4 V @ 2 A) results in greater power dissipation in the same circuit. This must be evaluated in thermal and efficiency analyses before substitution.

Q: Can I substitute the S2G-LTP with a part rated for lower current, such as the S2G-M3/52T (1.5 A)?

A: Only if your circuit operates at or below 1.5 A average rectified current. The S2G-M3/52T is rated for 1.5 A maximum, while the S2G-LTP is rated for 2 A. Operating a 1.5 A-rated device at currents exceeding its rating will cause excessive heating and premature failure. Verify your circuit's actual current demand before selecting a lower-rated substitute.

Q: Are all substitute parts ROHS3 compliant?

A: Most recommended substitutes (S2G, S2GH, SB2G-M3/5BT, CMR2U-04 TR13 PBFREE, S2G-M3/52T) are ROHS3 compliant. The Diotec Semiconductor S2G lists RoHS status as "Not applicable." Verify compliance requirements for your specific application and regulatory jurisdiction.

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

A: Tape & Reel (TR) packaging supplies components on continuous tape wound on reels, suitable for high-volume automated assembly. Cut Tape (CT) packaging supplies components on tape segments, suitable for lower-volume or manual assembly. Both formats contain the same component in the same package. Selection depends on your assembly process and volume requirements.

Q: Is the S2G R5G still available?

A: The S2G R5G is discontinued at DiGi Electronics. While inventory may exist from other distributors, long-term supply cannot be guaranteed. For new designs or long-term production, use active alternatives such as S2G, S2GH, or SB2G-M3/5BT.

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