SMLJ45A-TP Equivalent & Substitute Parts Reference

Part Overview

The SMLJ45A-TP by Micro Commercial Co is an active Transient Voltage Suppressor (TVS) diode, designed for general purpose interface protection. It features a unidirectional channel type, 45V reverse standoff voltage, and a 72.7V maximum clamping voltage rating at 41.2A peak pulse current. With a compact DO-214AB (SMC) surface mount package, this Zener-type TVS diode supports high peak pulse power of 3000W (3kW) and operates over a temperature range of -55°C to 175°C (TJ). Alternate sourcing or substitution may be necessary due to inventory requirements, packaging format preferences, compliance, or supply chain continuity.

Key Parameters

Manufacturer Part Number	Type	Unidirectional Channels	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Mounting Type	Package / Case	Applications	Product Status
SMLJ45A-TP	Zener	1	45V	50V	72.7V	41.2A	3000W	-55°C ~ 175°C (TJ)	Surface Mount	DO-214AB (SMC)	General Purpose	Active
SMDJ45A	Zener	1	45V	50V	72.7V	41.3A	3000W	-55°C ~ 150°C (TJ)	Surface Mount	DO-214AB (SMC)	General Purpose	Active

Substitute Part Grouping Explanation

Substitutability between SMLJ45A-TP and SMDJ45A is based strictly on these electrical and mechanical parameters: unidirectional channel type, reverse standoff voltage (45V), breakdown voltage (minimum 50V), clamping voltage (maximum 72.7V), peak pulse current rating, peak pulse power rating (3000W), surface mount DO-214AB (SMC) packaging, and active product status. Only those parts matching all listed criteria can be considered substitutes within the Transient Voltage Suppressor (TVS) diode category.

Parameter Comparison

Manufacturer Part Number	Type	Channels	Standoff Voltage (V)	Breakdown Voltage (V, Min)	Clamping Voltage (V, Max)	Peak Pulse Current (A)	Peak Pulse Power (W)	Operating Temperature (°C)	Mounting Type	Package / Case	Applications	Product Status
SMLJ45A-TP	Zener	1	45	50	72.7	41.2	3000	-55 to 175	Surface Mount	DO-214AB (SMC)	General Purpose	Active
SMDJ45A	Zener	1	45	50	72.7	41.3	3000	-55 to 150	Surface Mount	DO-214AB (SMC)	General Purpose	Active

Engineering Selection Recommendations

Both SMLJ45A-TP and SMDJ45A are active and current production status Transient Voltage Suppressors (TVS). SMDJ45A holds ROHS3 compliance and REACH unaffected status, allowing selection in applications requiring these environmental certifications. SMLJ45A-TP is REACH unaffected. ECCN and HTSUS codes align for both devices, indicating comparable export and tariff classifications.

Frequently Asked Questions (FAQ)

Q1: What defines a substitute for SMLJ45A-TP in the Transient Voltage Suppressors (TVS) category?
A1: Substitutes must match key parameters: unidirectional channel, 45V standoff voltage, minimum 50V breakdown voltage, maximum 72.7V clamping voltage, peak pulse current rating, 3000W peak power, surface mount DO-214AB (SMC) package, and general purpose application suitability.

Q2: Are both SMLJ45A-TP and SMDJ45A suitable for surface mount integration?
A2: Yes. Both use the DO-214AB (SMC) package type and are specified for surface mount applications.

Q3: Is there any difference in environmental compliance between the two parts?
A3: SMDJ45A is ROHS3 compliant and REACH unaffected. SMLJ45A-TP is REACH unaffected.

Q4: Does the peak pulse current difference of 41.2A versus 41.3A affect substitution?
A4: Both ratings are within the specified key parameters in the provided data set.

Q5: Are the operating temperature ranges equivalent?
A5: SMLJ45A-TP operates from -55°C to 175°C (TJ); SMDJ45A operates from -55°C to 150°C (TJ) as specified.

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