SMLJ64A-TP Equivalent & Substitute Parts

Part Overview

The SMLJ64A-TP is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose interface protection applications. This surface-mount component operates with a 64V reverse standoff voltage and provides 3000W peak pulse power dissipation in a compact DO-214AB (SMC) package. The part is currently in active production status with 971 pieces available in inventory.

Identifying equivalent and substitute parts is necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility permits component optimization while maintaining circuit protection performance.

Substiute Parts

SMLJ64A-TP

Micro Commercial CoIn Stock: 1037SMLJ64A-TP Datasheet

Current PartRFQ

SMDJ64A

Alpha & Omega Semiconductor Inc.In Stock: 17180SMDJ64A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMLJ64A-TP is determined by strict equivalence across the following critical parameters:

Voltage Parameters: Reverse standoff voltage of 64V, breakdown voltage minimum of 71.1V, and clamping voltage maximum of 103V at peak pulse current must be identical to ensure proper circuit protection thresholds.

Current and Power Ratings: Peak pulse current of 29.2A (10/1000µs waveform) and peak pulse power of 3000W must match exactly to guarantee adequate transient suppression capability.

Package and Configuration: Surface-mount DO-214AB (SMC) package with single unidirectional channel is required for mechanical and electrical compatibility.

Device Type: Zener-type TVS diode classification must be maintained.

The SMDJ64A from Alpha & Omega Semiconductor Inc. meets all these substitution criteria and is classified as a direct equivalent part.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: The SMLJ64A-TP remains the preferred choice when available, as it provides the full operating temperature range of -55°C to 175°C (TJ), offering maximum thermal margin for high-temperature applications.

Substitute Part Selection: The SMDJ64A is a direct electrical and mechanical equivalent with identical voltage, current, and power specifications. Selection of SMDJ64A is appropriate when:

• Supply of SMLJ64A-TP is unavailable or subject to extended lead times
• Application operating temperature does not exceed 150°C (TJ)
• Both parts maintain active production status and REACH/ECCN compliance

The SMDJ64A offers significantly higher inventory availability (17,100 pieces) compared to SMLJ64A-TP (971 pieces), which may provide supply chain advantages.

Both parts are RoHS-compliant or REACH-unaffected, ensuring regulatory compatibility in current manufacturing environments.

Frequently Asked Questions (FAQ)

Q: Can SMDJ64A be used as a direct replacement for SMLJ64A-TP in all applications?

A: The SMDJ64A is electrically and mechanically equivalent for all voltage, current, and power specifications. However, the operating temperature range differs: SMDJ64A is rated to 150°C (TJ) versus 175°C (TJ) for SMLJ64A-TP. Substitution is valid only if the application does not require operation above 150°C junction temperature.

Q: Are there any package compatibility issues between these parts?

A: No. Both SMLJ64A-TP and SMDJ64A use identical DO-214AB (SMC) surface-mount packaging. PCB footprints, solder pad layouts, and mechanical dimensions are compatible without modification.

Q: What is the significance of the 64V reverse standoff voltage?

A: The 64V reverse standoff voltage defines the maximum continuous voltage the TVS diode can withstand without conducting. This parameter must match exactly in substitute parts to ensure the circuit protection threshold remains unchanged.

Q: How do the clamping voltage specifications affect substitution?

A: The clamping voltage of 103V at peak pulse current (29.2A) determines the maximum voltage transient that reaches the protected circuit. Identical clamping voltage across substitute parts ensures equivalent protection performance.

Q: What does the 10/1000µs waveform specification mean?

A: This describes the standard test pulse waveform for TVS diode ratings: 10 microseconds rise time and 1000 microseconds pulse width. The 29.2A peak pulse current rating applies specifically to this waveform profile.

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

A: Yes. Both SMLJ64A-TP and SMDJ64A are classified for general-purpose applications and provide equivalent transient suppression performance in interface protection circuits.

Q: What compliance certifications apply to these parts?

A: Both parts carry EAR99 export classification and REACH Unaffected status. The SMDJ64A additionally carries RoHS3 compliance certification.