MASMLJ15A Equivalent & Substitute Parts

Part Overview

The MASMLJ15A is an active Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This unidirectional Zener-type device operates in the 15V reverse standoff category with a 24.4V maximum clamping voltage and 123A peak pulse current capability. The component is qualified to MIL-PRF-19500 military standards and is currently in active production status. Identification of equivalent and substitute parts is necessary to address inventory availability, packaging requirements, compliance specifications, and supply chain flexibility while maintaining electrical and mechanical compatibility.

Substiute Parts

MASMLJ15A

Microchip TechnologyIn Stock: 888MASMLJ15A Datasheet

Current PartRFQ

MSMLJ15A

MDE Semiconductor IncIn Stock: 2037MSMLJ15A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MASMLJ15A is determined by strict electrical and mechanical parameter matching. The following criteria establish valid substitute relationships:

Electrical Parameters (Must Match Exactly):

• Voltage - Reverse Standoff (Typ): 15V
• Voltage - Breakdown (Min): 16.7V
• Voltage - Clamping (Max) @ Ipp: 24.4V
• Current - Peak Pulse (10/1000µs): 123A
• Power - Peak Pulse: 3000W
• Type: Zener
• Unidirectional Channels: 1

Mechanical Parameters (Must Match Exactly):

• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount

Operating Conditions (Substitute Range Must Encompass or Equal):

• Operating Temperature Range: -65°C to 150°C (TJ)

Packaging Format (May Differ):

• Bulk or Tape & Reel formats are both acceptable provided all electrical and mechanical parameters match

The MSMLJ15A meets all substitution criteria and is classified as a direct equivalent part.

Parameter Comparison

Engineering Selection Recommendations

MSMLJ15A as Direct Substitute:

The MSMLJ15A qualifies as a direct electrical and mechanical equivalent to the MASMLJ15A. All critical electrical parameters—reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, and peak pulse power—are identical. Package and mounting specifications match exactly, ensuring PCB footprint and assembly process compatibility.

Considerations for Implementation:

1. Operating Temperature Range: The MSMLJ15A operates across -55°C to 150°C (TJ), compared to the MASMLJ15A range of -65°C to 150°C. Applications requiring operation below -55°C must retain the MASMLJ15A.

2. RoHS Compliance: The MSMLJ15A is ROHS3 compliant, whereas the MASMLJ15A is RoHS non-compliant. Selection depends on end-product compliance requirements.

3. Packaging Format: The MASMLJ15A is supplied in Bulk format, while the MSMLJ15A is supplied in Tape & Reel (TR) format. Packaging selection aligns with manufacturing and inventory management processes.

4. Military Qualification: The MASMLJ15A carries MIL-PRF-19500 qualification. The MSMLJ15A qualification status is not provided in the input parameters. Applications requiring military-grade certification must verify qualification status independently.

5. Inventory Availability: The MSMLJ15A has 1957 pieces in stock compared to 838 pieces for the MASMLJ15A, providing supply chain flexibility.

Both parts are active products from established manufacturers and are suitable for general-purpose TVS applications where electrical and mechanical parameters align with circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the MSMLJ15A replace the MASMLJ15A in all applications?

A: The MSMLJ15A is electrically and mechanically equivalent for applications operating within the -55°C to 150°C temperature range. Applications requiring operation below -55°C must use the MASMLJ15A. Applications with military qualification requirements must verify the MSMLJ15A's certification status.

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

A: Bulk packaging supplies components loose in a container, suitable for manual assembly or small-volume production. Tape & Reel (TR) packaging supplies components on continuous tape in reels, optimized for automated pick-and-place assembly equipment. Both formats contain identical components; packaging selection depends on manufacturing process requirements.

Q: Are the electrical specifications identical between MASMLJ15A and MSMLJ15A?

A: Yes. Both parts have identical reverse standoff voltage (15V), breakdown voltage (16.7V), clamping voltage (24.4V), peak pulse current (123A), and peak pulse power (3000W). Both are unidirectional Zener-type TVS diodes in DO-214AB surface-mount packages.

Q: Why does the MSMLJ15A have a narrower operating temperature range?

A: The MSMLJ15A operates from -55°C to 150°C (TJ), while the MASMLJ15A operates from -65°C to 150°C (TJ). This difference reflects the design specifications of each manufacturer. Applications requiring operation below -55°C must use the MASMLJ15A.

Q: What does RoHS compliance mean for these parts?

A: RoHS (Restriction of Hazardous Substances) compliance indicates the component meets environmental regulations restricting lead and other hazardous materials. The MSMLJ15A is ROHS3 compliant; the MASMLJ15A is RoHS non-compliant. Selection depends on end-product regulatory requirements.

Q: Are both parts suitable for general-purpose TVS applications?

A: Yes. Both the MASMLJ15A and MSMLJ15A are designated for general-purpose applications and provide identical overvoltage protection performance within their specified operating parameters.

Q: What is the significance of the DO-214AB package designation?

A: DO-214AB is a standardized surface-mount package for semiconductor diodes. Both parts use this identical package, ensuring compatibility with the same PCB footprint and assembly processes.

Q: Can I mix MASMLJ15A and MSMLJ15A in the same production run?

A: Yes, provided all application requirements fall within the overlapping specifications. Both parts are electrically and mechanically equivalent for general-purpose TVS applications. Verify that operating temperature requirements do not exceed -55°C and that RoHS compliance requirements are satisfied.