MLCE7.0AE3 Equivalent & Substitute Parts

Part Overview

The MLCE7.0AE3 is a unidirectional Zener-type transient voltage suppressor (TVS) diode manufactured by Microchip Technology. This through-hole component is designed for general-purpose transient voltage protection applications, featuring a 7V reverse standoff voltage and 12V maximum clamping voltage at peak pulse current. The device is qualified to MIL-PRF-19500 military standards and operates across an extended temperature range of -65°C to 150°C. The MLCE7.0AE3 is currently in active production status with 758 units available in bulk packaging.

Equivalent and substitute parts are identified based on matching electrical performance parameters, mechanical compatibility, and functional equivalence within the TVS diode category. Substitutes maintain identical voltage ratings, peak pulse current specifications, and through-hole mounting characteristics while potentially offering different packaging formats, compliance certifications, or temperature operating ranges.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	7	V
Voltage - Breakdown (Min)	7.78	V
Voltage - Clamping (Max) @ Ipp	12	V
Current - Peak Pulse (10/1000µs)	100	A
Power - Peak Pulse	1500	W
Capacitance @ Frequency	100	pF @ 1MHz
Operating Temperature Range	-65 to 150	°C (TJ)
Mounting Type	Through Hole
Package / Case	DO-201AA, DO-27, Axial
Type	Zener
Unidirectional Channels	1

Substitute Part Grouping Explanation

Substitution eligibility for the MLCE7.0AE3 is determined by strict equivalence across the following critical electrical and mechanical parameters:

Voltage Specifications: Substitute parts must maintain identical reverse standoff voltage (7V typical), breakdown voltage minimum (7.78V), and maximum clamping voltage (12V @ Ipp). These parameters define the protection threshold and response characteristics of the TVS diode.

Current and Power Ratings: Substitute parts must support the same peak pulse current of 100A at the 10/1000µs waveform and deliver equivalent peak pulse power of 1500W (1.5kW).

Device Type and Configuration: Substitute parts must be Zener-type TVS diodes with single unidirectional channel configuration.

Mounting and Package Compatibility: Substitute parts must utilize through-hole mounting technology and be compatible with DO-201AA, DO-27, or equivalent axial package formats.

Applications: Substitute parts must be rated for general-purpose transient voltage suppression applications.

The LCE7.0A manufactured by Littelfuse Inc. meets all substitution criteria and is identified as a direct equivalent to the MLCE7.0AE3.

Parameter Comparison

Parameter	MLCE7.0AE3 (Microchip)	LCE7.0A (Littelfuse)	Match Status
Voltage - Reverse Standoff (Typ)	7V	7V	Equivalent
Voltage - Breakdown (Min)	7.78V	7.78V	Equivalent
Voltage - Clamping (Max) @ Ipp	12V	12V	Equivalent
Current - Peak Pulse (10/1000µs)	100A	100A	Equivalent
Power - Peak Pulse	1500W	1500W	Equivalent
Type	Zener	Zener	Equivalent
Unidirectional Channels	1	1	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	DO-201AA, DO-27, Axial	DO-201AA, DO-27, Axial	Equivalent
Operating Temperature Range	-65°C to 150°C	-55°C to 175°C	LCE7.0A has wider range
Product Status	Active	Active	Both active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Different compliance

Engineering Selection Recommendations

Primary Selection - MLCE7.0AE3 (Microchip Technology): The MLCE7.0AE3 is the specified component and remains the primary selection when MIL-PRF-19500 military qualification is a design requirement. This device is actively produced and maintains military-grade certification. Use this part when military standards compliance is mandatory for the application.

Equivalent Substitute - LCE7.0A (Littelfuse Inc.): The LCE7.0A is a direct electrical and mechanical equivalent that provides identical performance across all critical TVS diode parameters. This substitute is suitable for applications where military qualification is not required. The LCE7.0A offers ROHS3 compliance, making it appropriate for designs with environmental or regulatory compliance requirements. The extended operating temperature range (-55°C to 175°C) provides additional thermal margin compared to the MLCE7.0AE3 (-65°C to 150°C). Both devices are in active production status with established supply availability.

Compliance Considerations: Selection between these two parts should account for regulatory requirements. The MLCE7.0AE3 is RoHS non-compliant, while the LCE7.0A is ROHS3 compliant. Both devices are REACH unaffected and carry EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can the LCE7.0A be used as a direct replacement for the MLCE7.0AE3 in all applications?

A: The LCE7.0A is electrically and mechanically equivalent to the MLCE7.0AE3 across all critical TVS diode parameters. Direct substitution is valid for applications where MIL-PRF-19500 military qualification is not a design requirement. Both devices deliver identical voltage protection thresholds, peak pulse current capacity, and power dissipation ratings.

Q: What are the key differences between these two parts?

A: The primary differences are manufacturer identity, packaging format, compliance certifications, and operating temperature range. The MLCE7.0AE3 is supplied in bulk packaging with MIL-PRF-19500 qualification and operates from -65°C to 150°C. The LCE7.0A is supplied in cut tape packaging, is ROHS3 compliant, and operates from -55°C to 175°C. All electrical performance parameters are identical.

Q: Are both parts available in the same package format?

A: Both the MLCE7.0AE3 and LCE7.0A utilize through-hole mounting in DO-201AA, DO-27, or equivalent axial package formats. The devices are mechanically compatible and can be used interchangeably in PCB designs that accommodate axial through-hole components.

Q: Which part should be selected for a design requiring RoHS compliance?

A: The LCE7.0A is ROHS3 compliant and is the appropriate selection for designs with RoHS compliance requirements. The MLCE7.0AE3 is RoHS non-compliant and should not be used in applications where RoHS certification is mandatory.

Q: What is the significance of the capacitance specification for the MLCE7.0AE3?

A: The capacitance value of 100pF at 1MHz is provided for the MLCE7.0AE3 and characterizes the device's high-frequency behavior. This parameter is relevant for applications involving fast transient events or high-frequency signal integrity considerations. The LCE7.0A does not provide a specified capacitance value in the available data.

Q: Can these TVS diodes be used for power line protection applications?

A: No. Both the MLCE7.0AE3 and LCE7.0A are specified for general-purpose transient voltage suppression and are not rated for power line protection applications. Power line protection requires components specifically qualified and tested for utility voltage transient suppression.

Q: What is the difference between reverse standoff voltage and breakdown voltage?

A: The reverse standoff voltage (7V typical) is the maximum voltage the TVS diode can sustain without conducting. The breakdown voltage (7.78V minimum) is the threshold at which the device begins to conduct and provide transient suppression. The clamping voltage (12V maximum) is the voltage level maintained across the device during peak pulse current conditions.

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