SMLJ170A-TP Equivalent & Substitute Parts

Part Overview

The SMLJ170A-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 170V reverse standoff voltage and provides 275V maximum clamping voltage at peak pulse current. The part is currently in active production status with 757 pieces available in bulk packaging.

Identifying equivalent and substitute parts is necessary when the original SMLJ170A-TP becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when supply chain optimization requires sourcing from multiple qualified manufacturers while maintaining identical electrical performance.

Substiute Parts

SMLJ170A-TP

Micro Commercial CoIn Stock: 787SMLJ170A-TP Datasheet

Current PartRFQ

SMDJ170A

Alpha & Omega Semiconductor Inc.In Stock: 10142SMDJ170A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMLJ170A-TP is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Voltage - Reverse Standoff (Typ): 170V
• Voltage - Breakdown (Min): 189V
• Voltage - Clamping (Max) @ Ipp: 275V
• Current - Peak Pulse (10/1000µs): 11A
• Power - Peak Pulse: 3000W

Mechanical Equivalence Requirements:

• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Type: Zener

Compliance Requirements:

• REACH Status: REACH Unaffected
• ECCN: EAR99
• HTSUS: 8541.10.0080

Parts meeting all electrical, mechanical, and compliance criteria are classified as direct substitutes. Packaging format (Bulk vs. Tape & Reel) does not affect electrical or mechanical compatibility and represents a supply chain variable only.

Parameter Comparison

*Operating temperature range: SMDJ170A operates to 150°C maximum junction temperature, compared to 175°C for SMLJ170A-TP. Applications requiring sustained operation above 150°C require verification of thermal design margins.

Engineering Selection Recommendations

SMDJ170A as Direct Substitute:

The SMDJ170A manufactured by Alpha & Omega Semiconductor Inc. is electrically and mechanically equivalent to the SMLJ170A-TP across all critical parameters. Both components are active products with identical REACH and export compliance status (REACH Unaffected, EAR99, HTSUS 8541.10.0080).

The primary difference is packaging format: SMDJ170A is supplied in Tape & Reel format versus Bulk for the SMLJ170A-TP. This distinction affects manufacturing logistics and component handling but does not impact electrical performance or board-level compatibility.

The operating temperature range difference (150°C vs. 175°C maximum junction temperature) is a secondary consideration. Selection of SMDJ170A is appropriate for applications where sustained junction temperatures remain below 150°C. Applications with thermal designs that may approach or exceed 150°C junction temperature should retain the SMLJ170A-TP or conduct thermal analysis to confirm margin adequacy.

Both parts are currently in active production with confirmed inventory availability.

Frequently Asked Questions (FAQ)

Q: Can SMDJ170A be used as a direct replacement for SMLJ170A-TP in existing designs?

A: Yes. The SMDJ170A provides identical electrical performance across voltage clamping, breakdown, standoff, peak pulse current, and power dissipation specifications. Both components use the same DO-214AB (SMC) surface-mount package. The only difference is packaging format (Tape & Reel vs. Bulk), which does not affect circuit performance or PCB assembly compatibility.

Q: What is the significance of the operating temperature range difference?

A: The SMLJ170A-TP operates to 175°C junction temperature, while SMDJ170A operates to 150°C. For most general-purpose interface protection applications, this difference is not limiting. However, designs with high ambient temperatures or high power dissipation that result in junction temperatures approaching 150°C should verify thermal margins or retain the SMLJ170A-TP.

Q: Are there compliance or regulatory differences between these parts?

A: No. Both components share identical REACH status (REACH Unaffected), export classification (EAR99), and tariff code (HTSUS 8541.10.0080). No additional compliance documentation or qualification is required when substituting between these parts.

Q: Does packaging format (Bulk vs. Tape & Reel) affect component selection?

A: Packaging format affects supply chain and manufacturing processes but not electrical or mechanical compatibility. Bulk packaging is suitable for manual assembly or small-volume production. Tape & Reel format is optimized for automated pick-and-place assembly. Selection depends on manufacturing process requirements, not circuit performance.

Q: What parameters must remain identical for a valid substitute?

A: Critical parameters that must match exactly are: Voltage - Reverse Standoff (170V), Voltage - Breakdown (189V), Voltage - Clamping (275V), Current - Peak Pulse (11A), Power - Peak Pulse (3000W), Package type (DO-214AB, SMC), and Unidirectional Channels (1). Packaging format and minor temperature range variations do not disqualify substitution.

Q: Are both parts currently available?

A: Yes. SMLJ170A-TP has 757 pieces in stock (Bulk). SMDJ170A has 10,100 pieces in stock (Tape & Reel). Both are active products from their respective manufacturers.