SM15H-TP Equivalent & Substitute Parts

Part Overview

The SM15H-TP is an active Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. This unidirectional zener diode operates with a 15V reverse standoff voltage and provides 32V clamping at peak pulse current, delivering 500W peak pulse power dissipation in a compact SOT-23 package. The device is RoHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified to address component availability, supply chain continuity, or specific application requirements where alternative electrical or mechanical parameters remain within acceptable operational boundaries.

Substiute Parts

SM15H-TP

Micro Commercial CoIn Stock: 864SM15H-TP Datasheet

Current PartRFQ

SM15T1G

onsemiIn Stock: 60351SM15T1G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SM15H-TP are identified based on the following critical parameters that determine functional equivalence:

Matching Parameters (Required for Substitution):

• Voltage - Reverse Standoff: 15V
• Voltage - Breakdown (Min): 16.7V
• Package / Case: SOT-23-3 (TO-236)
• Type: Zener, Unidirectional
• Unidirectional Channels: 2
• RoHS Compliance: ROHS3 Compliant
• Mounting Type: Surface Mount

Variable Parameters (Acceptable Differences):

• Voltage - Clamping (Max) @ Ipp: May differ based on application requirements
• Current - Peak Pulse: May differ based on application requirements
• Power - Peak Pulse: May differ based on application requirements
• Operating Temperature Range: May extend beyond the main part specification
• Packaging Format: Tape & Reel (TR) vs. Cut Tape (CT) & Digi-Reel®

The SM15T1G from onsemi qualifies as a substitute part, sharing identical reverse standoff voltage, breakdown voltage, package type, and compliance certifications while operating within the same thermal range with extended upper temperature capability.

Parameter Comparison

Engineering Selection Recommendations

SM15H-TP Selection Criteria:

• Primary choice for applications requiring 32V clamping voltage and 20A peak pulse current handling
• Suitable for high-energy transient suppression in general-purpose circuits
• Product status: Active with 805 units in stock
• RoHS3 compliant and REACH unaffected
• Operating temperature range: -55°C to 125°C

SM15T1G Selection Criteria:

• Alternative for applications with lower transient energy requirements (24V clamping, 10A peak pulse)
• Extended operating temperature range to 150°C supports high-temperature environments
• Product status: Active with 60,300 units in stock
• RoHS3 compliant and REACH unaffected
• Packaging available in Cut Tape (CT) & Digi-Reel® format

Both parts share identical reverse standoff voltage (15V), breakdown voltage (16.7V), and SOT-23-3 package configuration, ensuring mechanical and electrical compatibility within their respective performance envelopes. Selection between these parts depends on specific application transient energy levels and thermal operating conditions.

Frequently Asked Questions (FAQ)

Q: Can SM15T1G replace SM15H-TP in all applications?

A: SM15T1G is functionally equivalent for applications where the lower clamping voltage (24V vs. 32V) and reduced peak pulse current (10A vs. 20A) meet circuit protection requirements. Both devices share identical reverse standoff voltage and package configuration. Application-specific transient energy analysis determines suitability.

Q: What is the primary difference between these two TVS diodes?

A: The primary differences are voltage clamping performance and peak pulse current handling. SM15H-TP provides 32V clamping at 20A peak pulse (500W), while SM15T1G provides 24V clamping at 10A peak pulse (300W). Both maintain the same 15V reverse standoff voltage and operate in the SOT-23-3 package.

Q: Are the package dimensions identical?

A: Both parts use the SOT-23-3 (TO-236, SC-59) package configuration, ensuring identical footprint and mounting compatibility on printed circuit boards.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging?

A: Tape & Reel (TR) provides continuous reel packaging for automated assembly processes. Cut Tape (CT) & Digi-Reel® offers flexible packaging options for lower-volume applications or mixed-component orders. Both formats contain identical electronic components.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SM15H-TP and SM15T1G are RoHS3 compliant, REACH unaffected, and carry EAR99 ECCN classification with identical HTSUS coding (8541.10.0080). Both have MSL 1 (Unlimited) moisture sensitivity rating.

Q: Which part should be selected for high-temperature applications?

A: SM15T1G supports operating temperatures to 150°C, compared to SM15H-TP at 125°C maximum. For applications exceeding 125°C junction temperature, SM15T1G is the appropriate selection.

Q: Are there any electrical performance trade-offs when substituting SM15T1G for SM15H-TP?

A: Yes. SM15T1G provides lower clamping voltage (24V vs. 32V) and reduced peak pulse current capacity (10A vs. 20A). Applications requiring higher transient suppression energy must retain SM15H-TP. Lower-energy transient environments can use SM15T1G without performance degradation.