MASMLJ17A Equivalent & Substitute Parts

Part Overview

The MASMLJ17A is an active Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, classified as a unidirectional Zener-type device in the DO-214AB surface mount package. This component is designed for general-purpose transient voltage suppression applications, providing peak pulse power handling of 3000W with a clamping voltage of 27.6V maximum. The part is currently in active production status with military-grade qualification under MIL-PRF-19500. Equivalent and substitute parts are identified to address inventory availability, packaging preferences, compliance requirements, or supply chain alternatives while maintaining electrical and mechanical compatibility.

Substiute Parts

MASMLJ17A

Microchip TechnologyIn Stock: 849MASMLJ17A Datasheet

Current PartRFQ

MSMLJ17A

MDE Semiconductor IncIn Stock: 1785MSMLJ17A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MASMLJ17A are identified based on strict electrical and mechanical parameter matching within the TVS diode category. The substitution logic is based on the following critical parameters:

Electrical Equivalence Criteria:

• Voltage - Reverse Standoff (Typ): 17V
• Voltage - Breakdown (Min): 18.9V
• Voltage - Clamping (Max) @ Ipp: 27.6V
• Current - Peak Pulse (10/1000µs): within 106.6A to 108.7A range
• Power - Peak Pulse: 3000W (3kW)
• Type: Zener, Unidirectional (1 channel)

Mechanical Equivalence Criteria:

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

Operational Criteria:

• Operating Temperature Range: -55°C to 150°C (TJ) minimum
• Applications: General Purpose

Parts meeting all electrical and mechanical criteria are classified as direct substitutes. Variations in packaging format (Bulk versus Tape & Reel) and compliance certifications do not affect electrical or mechanical substitutability.

Parameter Comparison

Engineering Selection Recommendations

MSMLJ17A as Direct Substitute:

The MSMLJ17A manufactured by MDE Semiconductor Inc qualifies as a direct electrical and mechanical substitute for the MASMLJ17A. All critical voltage parameters, peak pulse current, power dissipation, device type, channel configuration, and package specifications are equivalent or within acceptable tolerance ranges.

Considerations for Selection:

1. Operating Temperature Range: The MSMLJ17A operates from -55°C to 150°C (TJ), compared to the MASMLJ17A range of -65°C to 150°C (TJ). Applications requiring operation below -55°C must retain the MASMLJ17A.

2. Compliance Status: The MSMLJ17A carries ROHS3 compliance certification, whereas the MASMLJ17A is RoHS non-compliant. Applications subject to RoHS regulatory requirements must use the MSMLJ17A.

3. Packaging Format: The MSMLJ17A is supplied in Tape & Reel format, while the MASMLJ17A is supplied in Bulk format. Selection depends on assembly process requirements and inventory management practices.

4. Military Qualification: The MASMLJ17A carries MIL-PRF-19500 military-grade qualification. Applications requiring military specification compliance must retain the MASMLJ17A unless the MSMLJ17A is independently qualified to equivalent military standards.

5. Inventory Availability: The MSMLJ17A has 1710 pieces in stock compared to 771 pieces for the MASMLJ17A, providing greater supply availability.

Frequently Asked Questions (FAQ)

Q: Can MSMLJ17A be used as a direct replacement for MASMLJ17A in all applications?

A: The MSMLJ17A is electrically and mechanically equivalent for general-purpose transient voltage suppression applications. However, applications requiring operation below -55°C ambient temperature, military specification compliance (MIL-PRF-19500), or RoHS non-compliant designs must retain the MASMLJ17A.

Q: What is the difference in peak pulse current between these parts?

A: The MASMLJ17A is rated at 106.6A peak pulse current, while the MSMLJ17A is rated at 108.7A peak pulse current. Both values fall within the acceptable operating range for 17V TVS diodes with 27.6V clamping voltage and 3000W peak pulse power. The difference of 2.1A represents a 1.97% variation and does not affect circuit protection performance.

Q: Are the DO-214AB packages identical between manufacturers?

A: Both parts use the DO-214AB (SMC) surface mount package. The physical dimensions, thermal characteristics, and PCB footprint are standardized for this package type, ensuring mechanical and thermal compatibility in circuit board assembly.

Q: Does packaging format (Bulk versus Tape & Reel) affect electrical performance?

A: No. Packaging format affects only supply chain logistics, inventory handling, and automated assembly compatibility. Electrical and thermal performance is identical regardless of whether the component is supplied in Bulk or Tape & Reel format.

Q: What is the significance of the ROHS3 compliance difference?

A: ROHS3 compliance indicates the MSMLJ17A meets current Restriction of Hazardous Substances regulations. The MASMLJ17A, marked as RoHS non-compliant, may contain restricted substances. Selection depends on regulatory requirements applicable to the end application and market region.

Q: Can these parts be intermixed in the same circuit design?

A: Yes, provided the application does not require operation below -55°C, military specification compliance, or RoHS non-compliant design. For applications meeting these criteria, parts must not be intermixed and design documentation must specify the required part number.