ER1M-TP Equivalent & Substitute Parts

Part Overview

The ER1M-TP is a general-purpose rectifier diode rated for 1000 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AA (SMB) package. Manufactured by Micro Commercial Co, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts with active product status are necessary for new designs and ongoing production requirements. Suitable alternatives maintain the same voltage and package specifications while offering improved availability and active manufacturer support.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	1000	V
Current - Average Rectified (Io)	1	A
Reverse Recovery Time (trr)	100	ns
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-50°C ~ 150°C	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the ER1M-TP is determined by strict equivalence in the following parameters:

Primary Equivalence Criteria:

Voltage - DC Reverse (Vr) (Max): 1000 V
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Secondary Compatibility Factors:

Current - Average Rectified (Io): Equal or greater rating
Operating Temperature Range: Equal or greater range
Reverse Recovery Time (trr): Equal or faster performance

The UF1M-TP qualifies as a direct equivalent, maintaining identical voltage, current, package, and speed specifications with active product status. The S2MHE3_A/H qualifies as a functional substitute with higher current rating (1.5 A) and automotive-grade qualification, suitable for applications where the increased current capacity and temperature range (-55°C ~ 150°C) provide design margin.

Parameter Comparison

Parameter	ER1M-TP	UF1M-TP	S2MHE3_A/H
Manufacturer	Micro Commercial Co	Micro Commercial Co	Vishay General Semiconductor - Diodes Division
Product Status	Obsolete	Active	Active
Voltage - DC Reverse (Vr) (Max)	1000 V	1000 V	1000 V
Current - Average Rectified (Io)	1 A	1 A	1.5 A
Voltage - Forward (Vf) (Max) @ If	1.7 V @ 1 A	Not specified	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)	100 ns	100 ns	2 µs
Current - Reverse Leakage @ Vr	5 µA @ 1000 V	10 µA @ 1000 V	1 µA @ 1000 V
Capacitance @ Vr, F	45 pF @ 4V, 1MHz	17 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	-50°C ~ 150°C	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Grade	—	—	Automotive
Qualification	—	—	AEC-Q101

Engineering Selection Recommendations

UF1M-TP (Direct Equivalent): Select the UF1M-TP for direct replacement of the ER1M-TP in new designs and production. This part maintains identical electrical specifications (1000 V, 1 A, 100 ns recovery time) and package configuration while offering active product status and improved availability. Both parts are ROHS3 compliant and carry unlimited moisture sensitivity rating. The UF1M-TP is the preferred choice for applications requiring exact electrical performance matching.

S2MHE3_A/H (Functional Substitute): Select the S2MHE3_A/H when design requirements permit higher current capacity (1.5 A) and extended temperature range (-55°C to 150°C). This Vishay part carries automotive-grade qualification (AEC-Q101) and is suitable for applications requiring enhanced reliability margins. The S2MHE3_A/H exhibits standard recovery characteristics (2 µs) rather than fast recovery, which may impact high-frequency switching applications. This part is appropriate for designs where the increased current rating and automotive qualification provide system-level benefits.

Frequently Asked Questions (FAQ)

Q: Can the UF1M-TP directly replace the ER1M-TP without circuit modification?

A: Yes. The UF1M-TP maintains identical voltage rating (1000 V), current rating (1 A), reverse recovery time (100 ns), package (DO-214AA, SMB), and operating temperature range (-50°C to 150°C). No circuit modifications are required.

Q: What is the primary difference between the UF1M-TP and S2MHE3_A/H?

A: The UF1M-TP is a direct electrical equivalent with fast recovery characteristics (100 ns). The S2MHE3_A/H offers higher current capacity (1.5 A versus 1 A), extended low-temperature rating (-55°C versus -50°C), and automotive qualification, but operates with standard recovery speed (2 µs versus 100 ns). The recovery time difference affects switching frequency performance.

Q: Are all three parts available in the same package?

A: Yes. All three parts use the DO-214AA (SMB) surface mount package, ensuring identical PCB footprint and assembly compatibility.

Q: Which substitute part should be selected for high-frequency switching applications?

A: The UF1M-TP maintains the fast recovery characteristic (100 ns) of the original ER1M-TP and is suitable for high-frequency applications. The S2MHE3_A/H, with 2 µs recovery time, is better suited for lower-frequency or standard-speed rectification circuits.

Q: Are all parts RoHS compliant?

A: Yes. The ER1M-TP, UF1M-TP, and S2MHE3_A/H are all ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Q: Can the S2MHE3_A/H be used in applications originally designed for 1 A current?

A: Yes. The S2MHE3_A/H is rated for 1.5 A average rectified current, which exceeds the 1 A requirement of the original ER1M-TP. The higher rating provides design margin and does not create compatibility issues in circuits designed for lower current.

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