MLCE48AE3 Equivalent & Substitute Parts

Part Overview

The MLCE48AE3 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 features a 48V reverse standoff voltage with a 77.4V maximum clamping voltage and 19.4A 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 when equivalent electrical performance parameters and mechanical compatibility are required due to inventory constraints, manufacturing discontinuation, or application-specific packaging preferences.

Substiute Parts

MLCE48AE3

Microchip TechnologyIn Stock: 1102MLCE48AE3 Datasheet

Current PartRFQ

LCE48A

Littelfuse Inc.In Stock: 1179LCE48A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MLCE48AE3 is determined by strict equivalence of electrical performance parameters and mechanical compatibility. The primary substitute identified is the LCE48A manufactured by Littelfuse Inc. This substitution is valid based on the following criteria:

Electrical Parameter Equivalence:

• Voltage - Reverse Standoff (Typ): 48V (identical)
• Voltage - Breakdown (Min): 53.3V (identical)
• Voltage - Clamping (Max) @ Ipp: 77.4V (identical)
• Current - Peak Pulse (10/1000µs): 19.4A (identical)
• Power - Peak Pulse: 1500W (identical)
• Type: Zener (identical)
• Unidirectional Channels: 1 (identical)

Mechanical Compatibility:

• Mounting Type: Through Hole (identical)
• Package / Case: DO-201AA, DO-27, Axial (identical)
• Applications: General Purpose (identical)

The LCE48A operates within the same electrical performance envelope and utilizes compatible through-hole packaging, enabling direct functional substitution in circuit applications requiring 48V standoff protection with 77.4V clamping characteristics.

Parameter Comparison

*Operating temperature range: LCE48A supports extended upper temperature limit (175°C vs. 150°C) and higher lower temperature limit (-55°C vs. -65°C). Applications requiring operation below -55°C or above 175°C must reference the MLCE48AE3 specifications.

Engineering Selection Recommendations

MLCE48AE3 (Microchip Technology) is the primary selection for applications requiring military-grade qualification under MIL-PRF-19500 and operation across the full temperature range of -65°C to 150°C. This component maintains Active product status and is currently in stock with 1092 units available. The military qualification and extended low-temperature operating range (-65°C) make this part suitable for defense, aerospace, and high-reliability industrial applications.

LCE48A (Littelfuse Inc.) is the qualified substitute for general commercial applications where RoHS3 compliance is required. This component provides identical electrical performance and mechanical compatibility with an extended upper operating temperature limit (175°C) and higher lower temperature limit (-55°C). The LCE48A is available in Cut Tape packaging with 1110 units in stock. Selection of LCE48A is appropriate when RoHS compliance is mandatory and military qualification is not required.

Both parts are classified as Active products with equivalent electrical parameters. Selection between them depends on compliance requirements (military qualification vs. RoHS3), operating temperature range, and packaging format (Bulk vs. Cut Tape).

Frequently Asked Questions (FAQ)

Q: Can the LCE48A directly replace the MLCE48AE3 in all applications?

A: The LCE48A provides electrical equivalence for all core TVS parameters (voltage, current, power ratings). However, applications requiring military qualification under MIL-PRF-19500 must use the MLCE48AE3. Additionally, applications operating below -55°C must use the MLCE48AE3 due to its extended low-temperature rating (-65°C vs. -55°C).

Q: What is the difference between the packaging formats (Bulk vs. Cut Tape)?

A: The MLCE48AE3 is supplied in Bulk packaging, while the LCE48A is supplied in Cut Tape (CT) format. Both are through-hole components with identical DO-201AA, DO-27, Axial package specifications. Packaging format affects handling, storage, and automated assembly compatibility but does not impact electrical performance or mechanical fit.

Q: Does RoHS compliance affect substitution eligibility?

A: RoHS compliance is a regulatory and supply-chain consideration, not an electrical performance criterion. The MLCE48AE3 is RoHS non-compliant, while the LCE48A is ROHS3 compliant. Applications subject to RoHS regulations must use the LCE48A. Applications without RoHS requirements can use either part based on other selection criteria.

Q: Are there any temperature-related limitations when substituting?

A: Yes. The MLCE48AE3 operates from -65°C to 150°C, while the LCE48A operates from -55°C to 175°C. Applications requiring operation below -55°C must use the MLCE48AE3. Applications requiring operation above 150°C must use the LCE48A. For applications within the overlapping range (-55°C to 150°C), both parts are thermally compatible.

Q: What does "Unidirectional Channels: 1" mean for substitution purposes?

A: This parameter indicates the device provides single-direction transient protection (one polarity). Both the MLCE48AE3 and LCE48A are unidirectional Zener diodes with identical channel configuration, confirming they provide equivalent protection topology for the same circuit applications.

Q: Can capacitance differences affect substitution?

A: The MLCE48AE3 specifies 100pF @ 1MHz capacitance, while the LCE48A does not provide this specification. For applications where TVS diode capacitance is a critical parameter (high-frequency signal integrity), the MLCE48AE3 is the specified choice. For general transient protection applications, capacitance differences are not substitution-limiting factors.