MLCE12AE3 Equivalent & Substitute Parts

Part Overview

The MLCE12AE3 is a unidirectional Zener-type Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose transient voltage protection applications. This through-hole component features a 12V reverse standoff voltage with a 19.9V maximum clamping voltage and 75A peak pulse current capability. The device is classified as Active product status and carries Military grade qualification under MIL-PRF-19500. Substitute parts are identified to address packaging format preferences, inventory availability, and compliance requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

MLCE12AE3

Microchip TechnologyIn Stock: 1252MLCE12AE3 Datasheet

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LCE12A

LittelfuseIn Stock: 2277LCE12A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MLCE12AE3 with the LCE12A is based on electrical parameter equivalence across all critical specifications. Both devices maintain identical voltage ratings (12V reverse standoff, 13.3V minimum breakdown, 19.9V maximum clamping) and current handling (75A peak pulse, 1500W peak power). Both are unidirectional Zener-type TVS diodes with through-hole mounting in DO-201AA/DO-27 axial packages. The substitution logic is determined by the following key parameters:

• Voltage - Reverse Standoff (Typ): 12V
• Voltage - Breakdown (Min): 13.3V
• Voltage - Clamping (Max) @ Ipp: 19.9V
• Current - Peak Pulse (10/1000µs): 75A
• Power - Peak Pulse: 1500W
• Unidirectional Channels: 1
• Mounting Type: Through Hole
• Package / Case: DO-201AA, DO-27, Axial

Parameter Comparison

Engineering Selection Recommendations

The LCE12A from Littelfuse is electrically and mechanically equivalent to the MLCE12AE3 across all critical transient voltage suppression parameters. Both devices are Active product status and suitable for general-purpose TVS applications.

Compliance Considerations:

The MLCE12AE3 carries Military grade qualification under MIL-PRF-19500 and is RoHS non-compliant. The LCE12A is ROHS3 compliant, making it suitable for applications requiring RoHS compliance. Selection between these parts should be based on specific compliance requirements of the end application.

Temperature Range:

The LCE12A operates across a wider temperature range (-55°C ~ 175°C) compared to the MLCE12AE3 (-65°C ~ 150°C). For applications requiring operation below -55°C or above 175°C, the MLCE12AE3 provides extended low-temperature capability to -65°C.

Packaging Format:

The MLCE12AE3 is supplied in Bulk packaging, while the LCE12A is supplied in Cut Tape (CT) format. Packaging selection depends on assembly process requirements and inventory management practices.

Frequently Asked Questions (FAQ)

Q: Are the MLCE12AE3 and LCE12A electrically interchangeable?

A: Yes. Both devices have identical voltage ratings (12V reverse standoff, 13.3V breakdown minimum, 19.9V clamping maximum) and current specifications (75A peak pulse, 1500W peak power). They are functionally equivalent for transient voltage suppression applications.

Q: What is the difference in operating temperature ranges?

A: The MLCE12AE3 operates from -65°C to 150°C, while the LCE12A operates from -55°C to 175°C. The MLCE12AE3 provides lower temperature capability; the LCE12A provides higher temperature capability. Application requirements determine which range is appropriate.

Q: Can I use the LCE12A as a direct replacement for the MLCE12AE3 in a Military-qualified design?

A: The LCE12A is electrically equivalent but carries different certifications. The MLCE12AE3 is MIL-PRF-19500 qualified; the LCE12A is ROHS3 compliant. Design qualification requirements must be evaluated against specific military or compliance standards applicable to the end application.

Q: What is the difference between Bulk and Cut Tape packaging?

A: Bulk packaging supplies components loose in a container, suitable for manual assembly or bulk handling. Cut Tape (CT) packaging supplies components on continuous tape cut to specified lengths, optimized for automated pick-and-place assembly equipment. Both formats contain identical components; packaging selection depends on assembly process requirements.

Q: Are both parts suitable for general-purpose transient voltage protection?

A: Yes. Both the MLCE12AE3 and LCE12A are classified for general-purpose applications and are Active product status. They are suitable for protecting circuits against transient voltage events within their specified electrical parameters.

Q: What compliance certifications apply to each part?

A: The MLCE12AE3 is Military grade (MIL-PRF-19500) and RoHS non-compliant. The LCE12A is ROHS3 compliant. Both are REACH Unaffected and classified under ECCN EAR99. Application compliance requirements determine which certification is necessary.