SL12T1G Equivalent & Substitute Parts

Part Overview

The SL12T1G is an active Transient Voltage Suppressor (TVS) diode manufactured by onsemi, designed for surface mount applications in the SOT-23-3 package. This unidirectional Zener-type TVS diode provides 12V reverse standoff voltage with 24V clamping capability and 5A peak pulse current rating. The device is qualified to AEC-Q101 automotive standards and maintains ROHS3 compliance. Substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity while maintaining equivalent electrical and mechanical performance.

Substiute Parts

SL12T1G

onsemiIn Stock: 21540SL12T1G Datasheet

Current PartRFQ

SL12.TCT

Semtech CorporationIn Stock: 44417SL12.TCT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SL12T1G is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 12V nominal
• Voltage - Breakdown (Min): 13.3V minimum
• Voltage - Clamping (Max) @ Ipp: 24V maximum
• Current - Peak Pulse (8/20µs): 5A minimum
• Power - Peak Pulse: 300W minimum
• Package / Case: SOT-23-3 (TO-236-3, SC-59)
• Mounting Type: Surface Mount
• Type: Zener
• Unidirectional Channels: 1

The SL12.TCT manufactured by Semtech Corporation meets all specified electrical parameters and package requirements, qualifying it as a direct substitute for the SL12T1G.

Parameter Comparison

Engineering Selection Recommendations

Both the SL12T1G and SL12.TCT are active products with equivalent electrical specifications and identical package configurations. Selection between these parts should be based on:

• Availability and lead time from respective manufacturers
• Inventory status and procurement requirements
• Operating temperature range requirements: SL12T1G supports -55°C to 150°C; SL12.TCT supports -55°C to 125°C
• Capacitance characteristics: SL12T1G at 4.6pF versus SL12.TCT at 5pF @ 1MHz
• Compliance certifications: Both parts maintain ROHS3, REACH Unaffected, and equivalent regulatory status

For applications requiring the full -55°C to 150°C operating range, the SL12T1G is the specified choice. For applications within -55°C to 125°C, either part is suitable.

Frequently Asked Questions (FAQ)

Q: Can SL12.TCT replace SL12T1G in all applications?

A: SL12.TCT meets all critical electrical parameters and package requirements. Substitution is valid for applications operating within -55°C to 125°C. Applications requiring operation above 125°C require the SL12T1G.

Q: What are the key differences between these parts?

A: Operating temperature range and capacitance at 1MHz differ. SL12T1G operates to 150°C with 4.6pF capacitance; SL12.TCT operates to 125°C with 5pF capacitance. All voltage, current, and power ratings are identical.

Q: Are both parts in the same package?

A: Yes. Both SL12T1G and SL12.TCT use SOT-23-3 (TO-236-3, SC-59) surface mount packages with identical pinouts and land patterns.

Q: Do these parts have the same compliance certifications?

A: Both parts are ROHS3 compliant, REACH Unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. The SL12T1G carries AEC-Q101 automotive qualification; AEC-Q101 status for SL12.TCT is not specified in the provided data.

Q: Which part should I select for new designs?

A: Selection depends on application temperature requirements and supply chain strategy. For automotive applications requiring AEC-Q101 qualification, specify SL12T1G. For general purpose applications within the 125°C limit, either part is acceptable based on availability.