ER1B-LTP Equivalent & Substitute Parts

Part Overview

The ER1B-LTP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 100 V DC reverse voltage and 1 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 support existing designs, maintain production continuity, and ensure long-term component availability for legacy applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 1 A	mV
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 100 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-65 to 175	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the ER1B-LTP are identified based on strict electrical and mechanical parameter compatibility within the general-purpose rectifier diode category. The substitution logic is organized into two groups:

Direct Equivalent (Electrical Match): The MURS110T3G from onsemi meets or exceeds all critical electrical specifications of the ER1B-LTP. Both parts share identical maximum reverse voltage (100 V), average rectified current (1 A), reverse recovery time (35 ns), fast recovery speed classification, and operating temperature range (-65°C to 175°C). Both are packaged in DO-214AA (SMB) surface mount configuration. The MURS110T3G is classified as "Active" product status, ensuring ongoing availability and support.

Similar Substitute (Higher Current Rating): The CGRB202-G from Comchip Technology provides a higher current rating (2 A versus 1 A) while maintaining the same 100 V reverse voltage specification and DO-214AA (SMB) package. This part is suitable for applications where the ER1B-LTP current capacity is marginal or where design margin improvement is acceptable. The CGRB202-G is classified as "Active" product status.

Both substitute parts comply with ROHS3 and REACH requirements, matching the environmental compliance profile of the ER1B-LTP.

Parameter Comparison

Parameter	ER1B-LTP (Main)	MURS110T3G (Direct Equivalent)	CGRB202-G (Similar Substitute)
Manufacturer	Micro Commercial Co	onsemi	Comchip Technology
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	100 V
Current - Average Rectified (Io)	1 A	1 A	2 A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 1 A	875 mV @ 1 A	1.1 V @ 2 A
Reverse Recovery Time (trr)	35 ns	35 ns	Not specified
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Current - Reverse Leakage @ Vr	5 µA @ 100 V	2 µA @ 100 V	5 µA @ 100 V
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-65 to 175°C	-65 to 175°C	Max 150°C
Product Status	Not For New Designs	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement: The MURS110T3G is the primary substitute for the ER1B-LTP. This part maintains electrical equivalence across all specified parameters, including reverse voltage, forward current, reverse recovery time, and operating temperature range. The MURS110T3G carries "Active" product status, ensuring long-term availability and manufacturing support. Both parts are ROHS3 compliant and REACH unaffected, maintaining identical environmental compliance profiles.

For Applications Requiring Design Margin: The CGRB202-G provides a higher current rating (2 A) suitable for applications where the 1 A specification of the ER1B-LTP represents a marginal design point. The CGRB202-G maintains the same 100 V reverse voltage and DO-214AA (SMB) package footprint. However, the maximum operating temperature of the CGRB202-G is limited to 150°C, compared to 175°C for the ER1B-LTP. This temperature limitation must be evaluated against the specific application's thermal requirements.

Both substitute parts are ROHS3 compliant and carry "Active" product status, providing superior long-term supply chain stability compared to the "Not For New Designs" status of the ER1B-LTP.

Frequently Asked Questions (FAQ)

Q: Can the MURS110T3G be used as a direct drop-in replacement for the ER1B-LTP?

A: Yes. The MURS110T3G meets all electrical specifications of the ER1B-LTP, including 100 V reverse voltage, 1 A average rectified current, 35 ns reverse recovery time, and identical operating temperature range (-65°C to 175°C). Both parts use the DO-214AA (SMB) surface mount package with identical pinout and footprint.

Q: What is the difference between the MURS110T3G and CGRB202-G?

A: The primary difference is current rating: MURS110T3G is rated for 1 A (matching the ER1B-LTP), while CGRB202-G is rated for 2 A. The CGRB202-G also has a lower maximum operating temperature (150°C versus 175°C). Both maintain the same 100 V reverse voltage and DO-214AA (SMB) package.

Q: Are there packaging differences between these parts?

A: The ER1B-LTP and CGRB202-G are supplied in Tape & Reel (TR) packaging. The MURS110T3G is supplied in Cut Tape (CT) and Digi-Reel® packaging. All three parts use the same DO-214AA (SMB) surface mount package for PCB assembly.

Q: Do all substitute parts meet the same environmental compliance standards?

A: Yes. The ER1B-LTP, MURS110T3G, and CGRB202-G are all ROHS3 compliant and REACH unaffected, meeting identical environmental and regulatory requirements.

Q: Why is the ER1B-LTP marked "Not For New Designs"?

A: This designation indicates the part has reached end-of-life status and is no longer recommended for new product development. The MURS110T3G and CGRB202-G, both classified as "Active," are the appropriate choices for new designs and ongoing production support.

Q: What is the forward voltage difference between the ER1B-LTP and MURS110T3G?

A: The ER1B-LTP has a maximum forward voltage of 950 mV at 1 A, while the MURS110T3G has a maximum forward voltage of 875 mV at 1 A. The MURS110T3G exhibits lower forward voltage drop, which may reduce power dissipation in the application.

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