ER1G-TP Equivalent & Substitute Parts

Part Overview

The ER1G-TP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 400 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AA (SMB) package. This component is classified as obsolete, indicating that direct procurement from original inventory may become limited. Identifying equivalent and substitute parts ensures design continuity and supply chain reliability for applications requiring fast recovery rectification in compact surface mount form factors.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	1	A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	75	ns
Current - Reverse Leakage @ Vr	5	µA @ 400 V
Mounting Type	Surface Mount	—
Package / Case	DO-214AA, SMB	—
Operating Temperature - Junction	-50°C ~ 150°C	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the ER1G-TP is determined by strict alignment of electrical and mechanical parameters within the rectifier diode category. The primary substitution criteria are:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Package / Case: DO-214AA, SMB (surface mount form factor)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Functional Compatibility Parameters:

Current - Average Rectified (Io): Equal to or greater than 1 A
Speed Classification: Fast Recovery or Standard Recovery
Operating Temperature Range: Must encompass or exceed -50°C to 150°C

Direct Equivalent: The ER1G-LTP from Micro Commercial Co is a direct equivalent, sharing the same base product number (ER1G), identical voltage and current ratings, and matching package specifications. The primary distinction is product status (Active vs. Obsolete) and packaging format (Tape & Reel vs. unspecified).

Similar Substitute: The S2G-M3/5BT from Vishay General Semiconductor - Diodes Division is a similar substitute with higher current rating (1.5 A vs. 1 A) and different recovery characteristics (Standard Recovery vs. Fast Recovery). This part maintains voltage compatibility and package conformance but operates under different transient response parameters.

Parameter Comparison

Parameter	ER1G-TP (Main)	ER1G-LTP (Direct Equivalent)	S2G-M3/5BT (Similar Substitute)
Manufacturer	Micro Commercial Co	Micro Commercial Co	Vishay General Semiconductor - Diodes Division
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V
Current - Average Rectified (Io)	1 A	1 A	1.5 A
Voltage - Forward (Vf) (Max) @ If	—	1.25 V @ 1 A	1.15 V @ 1.5 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)
Reverse Recovery Time (trr)	75 ns	35 ns	2 µs
Current - Reverse Leakage @ Vr	5 µA @ 400 V	5 µA @ 400 V	1 µA @ 400 V
Capacitance @ Vr, F	45 pF @ 4V, 1MHz	—	16 pF @ 4V, 1MHz
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Operating Temperature - Junction	-50°C ~ 150°C	-65°C ~ 175°C	-55°C ~ 150°C
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

ER1G-LTP (Direct Equivalent - Preferred): The ER1G-LTP is the primary substitute for the obsolete ER1G-TP. Both parts share identical electrical ratings (400 V, 1 A), matching package specifications (DO-214AA, SMB), and equivalent fast recovery characteristics (75 ns vs. 35 ns trr). The ER1G-LTP carries Active product status with ROHS3 compliance and unlimited moisture sensitivity rating, ensuring long-term availability and regulatory conformance. The extended operating temperature range (-65°C to 175°C vs. -50°C to 150°C) provides additional thermal margin. This part is suitable for direct replacement in existing designs without circuit modification.

S2G-M3/5BT (Similar Substitute - Application-Dependent): The S2G-M3/5BT from Vishay maintains 400 V voltage rating and DO-214AA package compatibility but introduces two significant differences: higher current rating (1.5 A vs. 1 A) and standard recovery characteristics (2 µs trr vs. 75 ns). The higher current capacity allows operation in circuits with increased current demands. However, the substantially longer reverse recovery time (2 µs) affects switching transient behavior and may introduce different electromagnetic interference characteristics. This part is suitable for applications where the original 1 A rating provides insufficient margin or where standard recovery performance is acceptable. Both parts maintain ROHS3 compliance and unlimited MSL rating.

Selection Criteria:

Use ER1G-LTP for direct replacement requiring identical electrical performance and fast recovery characteristics
Use S2G-M3/5BT for applications requiring higher current capacity or where standard recovery performance is compatible with circuit design
Both substitutes are Active products with established supply chains, addressing the obsolescence status of the ER1G-TP

Frequently Asked Questions (FAQ)

Q: Can the ER1G-LTP be used as a direct replacement for the ER1G-TP?

A: Yes. The ER1G-LTP is a direct equivalent with identical voltage rating (400 V), current rating (1 A), package type (DO-214AA, SMB), and fast recovery speed classification. The primary advantage is Active product status, ensuring continued availability. The ER1G-LTP is suitable for direct substitution without circuit redesign.

Q: What is the difference between the ER1G-LTP and S2G-M3/5BT?

A: Both parts share 400 V voltage rating and DO-214AA package compatibility. The ER1G-LTP maintains 1 A current rating with 35 ns reverse recovery time (fast recovery). The S2G-M3/5BT provides 1.5 A current rating with 2 µs reverse recovery time (standard recovery). The choice depends on circuit current requirements and acceptable switching transient characteristics.

Q: Does the higher current rating of the S2G-M3/5BT affect compatibility?

A: Higher current rating does not prevent substitution in circuits designed for 1 A operation. The diode operates within its rated limits at lower current levels. However, the significantly longer reverse recovery time (2 µs vs. 75 ns) may alter switching behavior and electromagnetic interference characteristics. Circuit validation is necessary if switching performance is critical to application function.

Q: Are all substitute parts RoHS compliant?

A: Yes. The ER1G-TP, ER1G-LTP, and S2G-M3/5BT are all ROHS3 compliant, meeting regulatory requirements for hazardous substance restrictions.

Q: What is the moisture sensitivity rating for these diodes?

A: All three parts carry Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture control requirements. Standard handling and storage practices are sufficient.

Q: Can the ER1G-TP be sourced despite its obsolete status?

A: The ER1G-TP shows 635 pieces in current inventory. However, obsolete status indicates no future production. The ER1G-LTP (39,594 pieces in stock) and S2G-M3/5BT (888 pieces in stock) provide active alternatives with established supply chains for long-term design continuity.

Q: What is the operating temperature range for each part?

A: ER1G-TP operates from -50°C to 150°C. ER1G-LTP operates from -65°C to 175°C, providing extended thermal range. S2G-M3/5BT operates from -55°C to 150°C. Selection depends on application temperature requirements.

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