MLCE20AE3 Equivalent & Substitute Parts

Part Overview

The MLCE20AE3 is a unidirectional Zener-type transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose transient protection applications. This through-hole component operates with a 20V reverse standoff voltage and provides 32.4V maximum clamping voltage at peak pulse current. The device is qualified to MIL-PRF-19500 military standards and is currently in active production status with 867 units in stock.

Equivalent and substitute parts are identified when alternative manufacturers offer TVS diodes with identical or compatible electrical and mechanical specifications, enabling procurement flexibility, inventory optimization, and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	20	V
Voltage - Breakdown (Min)	22.2	V
Voltage - Clamping (Max) @ Ipp	32.4	V
Current - Peak Pulse (10/1000µs)	46	A
Power - Peak Pulse	1500	W
Capacitance @ 1MHz	100	pF
Operating Temperature Range	-65 to 150	°C (TJ)
Package / Case	DO-201AA, DO-27, Axial	—
Mounting Type	Through Hole	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitution of the MLCE20AE3 is determined by strict equivalence of the following electrical and mechanical parameters:

Critical Substitution Parameters:

Voltage - Reverse Standoff (Typ): 20V
Voltage - Clamping (Max) @ Ipp: 32.4V
Current - Peak Pulse (10/1000µs): 46A
Power - Peak Pulse: 1500W
Mounting Type: Through Hole
Package / Case: DO-201AA, DO-27, Axial
Type: Zener
Unidirectional Channels: 1

The LCE20A manufactured by Littelfuse Inc. meets all critical electrical specifications and mechanical requirements. Both devices share identical voltage ratings, peak pulse current capacity, peak pulse power dissipation, and through-hole axial package configuration. The LCE20A is supplied in Cut Tape packaging and carries ROHS3 compliance certification, whereas the MLCE20AE3 is supplied in Bulk packaging and is RoHS non-compliant.

Parameter Comparison

Parameter	MLCE20AE3 (Microchip)	LCE20A (Littelfuse)	Match
Voltage - Reverse Standoff (Typ)	20V	20V	✓
Voltage - Breakdown (Min)	22.2V	22.2V	✓
Voltage - Clamping (Max) @ Ipp	32.4V	32.4V	✓
Current - Peak Pulse (10/1000µs)	46A	46A	✓
Power - Peak Pulse	1500W	1500W	✓
Operating Temperature Range	-65°C to 150°C	-55°C to 175°C	Partial*
Capacitance @ 1MHz	100pF	Not specified	—
Package / Case	DO-201AA, DO-27, Axial	DO-201AA, DO-27, Axial	✓
Mounting Type	Through Hole	Through Hole	✓
Type	Zener	Zener	✓
Unidirectional Channels	1	1	✓
Product Status	Active	Active	✓

*The LCE20A operating temperature range (-55°C to 175°C) encompasses the MLCE20AE3 range (-65°C to 150°C) with the exception of the lower temperature limit, which is 10°C higher.

Engineering Selection Recommendations

MLCE20AE3 (Primary Part): The MLCE20AE3 is qualified to MIL-PRF-19500 military standards and carries Military grade designation. This part is suitable for applications requiring military qualification compliance. The device is RoHS non-compliant and carries unlimited moisture sensitivity level (MSL 1). Current inventory is 867 units.

LCE20A (Substitute Part): The LCE20A is ROHS3 compliant and carries unlimited moisture sensitivity level (MSL 1). This part is suitable for applications requiring RoHS compliance. The LCE20A has a wider operating temperature range at the upper limit (175°C vs. 150°C) and a slightly higher lower temperature limit (-55°C vs. -65°C). Current inventory is 1513 units. The LCE20A is supplied in Cut Tape packaging, whereas the MLCE20AE3 is supplied in Bulk packaging.

Selection between these parts depends on regulatory compliance requirements (military qualification vs. RoHS compliance) and packaging format needs (Bulk vs. Cut Tape).

Frequently Asked Questions (FAQ)

Q: Can the LCE20A directly replace the MLCE20AE3 in all applications?

A: The LCE20A is electrically and mechanically equivalent to the MLCE20AE3 for all critical TVS diode parameters: voltage ratings, peak pulse current, power dissipation, and package configuration. However, the LCE20A does not carry MIL-PRF-19500 military qualification. Applications requiring military certification must use the MLCE20AE3. Applications requiring RoHS compliance must use the LCE20A.

Q: What is the difference in operating temperature range between these parts?

A: The MLCE20AE3 operates from -65°C to 150°C (TJ), while the LCE20A operates from -55°C to 175°C (TJ). The LCE20A has a higher upper temperature limit by 25°C and a higher lower temperature limit by 10°C. For applications requiring operation below -55°C, the MLCE20AE3 is required.

Q: Are the packaging formats interchangeable?

A: Both parts use identical through-hole axial package configurations (DO-201AA, DO-27). The MLCE20AE3 is supplied in Bulk packaging, while the LCE20A is supplied in Cut Tape (CT) packaging. The physical component form factor is identical; the difference is in the supply format and tape configuration for automated assembly.

Q: What compliance certifications differ between these parts?

A: The MLCE20AE3 is qualified to MIL-PRF-19500 military standards and is RoHS non-compliant. The LCE20A is ROHS3 compliant and does not carry military qualification. Both parts are REACH Unaffected and carry EAR99 ECCN classification.

Q: Is capacitance a factor in substitution?

A: The MLCE20AE3 specifies 100pF capacitance at 1MHz. The LCE20A does not provide a capacitance specification in the available data. For applications where capacitance is a critical parameter, the MLCE20AE3 specification should be verified against application requirements.

Q: Can either part be used for power line protection applications?

A: No. Both the MLCE20AE3 and LCE20A are designated for general-purpose applications and do not carry power line protection certification.

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