SMF20A-TP Equivalent & Substitute Parts

Part Overview

The SMF20A-TP is a unidirectional Zener-type Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose interface protection applications. This surface-mount component operates across a temperature range of -65°C to 175°C and is currently in active product status. The part is supplied in bulk packaging with SOD-123FL case format.

Finding equivalent and substitute parts for the SMF20A-TP is necessary to ensure design flexibility, manage supply chain continuity, and accommodate different packaging or sourcing requirements while maintaining identical electrical performance and mechanical compatibility.

Substiute Parts

SMF20A-TP

Micro Commercial CoIn Stock: 961SMF20A-TP Datasheet

Current PartRFQ

SMF20A

MDDIn Stock: 91902SMF20A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMF20A-TP are identified based on strict electrical and mechanical parameter matching. The substitution criteria are:

• Voltage Parameters: Reverse standoff voltage of 20V (typical), breakdown voltage minimum of 22.2V, and clamping voltage maximum of 32.4V at peak pulse current
• Current Rating: Peak pulse current of 6.2A at 10/1000µs pulse duration
• Power Dissipation: Peak pulse power of 200W
• Package Compatibility: SOD-123F surface-mount case format
• Device Type: Unidirectional Zener TVS diode with single channel configuration
• Application Class: General-purpose transient voltage suppression

Parts meeting all these electrical specifications and physical package requirements are classified as direct substitutes, regardless of manufacturer or packaging format (bulk versus tape & reel).

Parameter Comparison

Engineering Selection Recommendations

Both the SMF20A-TP and SMF20A are active-status products with identical electrical specifications for transient voltage suppression applications. The primary differences are:

Packaging Format: The main part (SMF20A-TP) is supplied in bulk packaging, while the substitute (SMF20A) is supplied in Tape & Reel format. Selection between these formats depends on assembly process requirements and order quantity.

Operating Temperature Range: The SMF20A-TP supports -65°C to 175°C, while the SMF20A supports -55°C to 150°C. For applications requiring the full -65°C lower temperature limit, the SMF20A-TP is the appropriate selection. For applications within the -55°C to 150°C range, both parts are functionally equivalent.

Compliance Status: The SMF20A includes RoHS3 compliance and MSL Level 1 moisture sensitivity rating. Both parts are REACH Unaffected and classified under ECCN EAR99.

Inventory Availability: The SMF20A demonstrates significantly higher inventory availability (91,851 pcs) compared to the SMF20A-TP (888 pcs), which may influence supply chain decisions.

Frequently Asked Questions (FAQ)

Q: Can SMF20A replace SMF20A-TP in all applications?

A: The SMF20A is electrically equivalent to the SMF20A-TP for all general-purpose transient voltage suppression applications within the overlapping operating temperature range of -55°C to 150°C. If your application requires operation below -55°C, the SMF20A-TP is required.

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

A: Bulk packaging is suitable for manual assembly or small-volume applications. Tape & Reel packaging is designed for automated pick-and-place assembly equipment and is standard for high-volume production. Both formats contain identical components.

Q: Are there any PCB layout or footprint differences between these parts?

A: No. Both parts use the SOD-123F surface-mount package, which specifies identical footprint dimensions and land patterns. PCB designs are fully interchangeable.

Q: What does the voltage clamping specification of 32.4V mean?

A: The clamping voltage is the maximum voltage that appears across the TVS diode during a transient event when peak pulse current (6.2A) flows through it. This parameter defines the protection level provided to downstream circuitry.

Q: Can I use these parts for power line protection applications?

A: No. Both the SMF20A-TP and SMF20A are specified for general-purpose applications only. Power line protection requires components specifically rated and certified for that application class.

Q: What is the significance of the 10/1000µs pulse duration specification?

A: This defines the test pulse waveform used to characterize the TVS diode's transient suppression performance. The 10µs rise time and 1000µs pulse width represent a standard test condition for evaluating peak pulse current and power dissipation ratings.