SMF12CT1G Equivalent & Substitute Parts

Part Overview

The SMF12CT1G is an active Transient Voltage Suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection applications. This unidirectional zener diode operates with a 12V reverse standoff voltage and provides 23V maximum clamping voltage at peak pulse current. The device is housed in a 6-TSSOP (SC-88/SOT-363) surface mount package and is ROHS3 compliant with unlimited moisture sensitivity rating. Substitute parts are identified when electrical characteristics, mechanical packaging, and compliance certifications remain equivalent across the specified parameter range.

Substiute Parts

SMF12CT1G

onsemiIn Stock: 45577SMF12CT1G Datasheet

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SZSMF12CT1G

onsemiIn Stock: 6339SZSMF12CT1G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMF12CT1G is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 12V (Max)
• Voltage - Breakdown: 13.3V (Min)
• Voltage - Clamping: 23V (Max) @ Ipp
• Current - Peak Pulse: 6A (8/20µs)
• Power - Peak Pulse: 100W
• Capacitance: 40pF @ 1MHz
• Operating Temperature: -40°C to 125°C
• Package: 6-TSSOP, SC-88, SOT-363
• Unidirectional Channels: 5
• Type: Zener
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The SZSMF12CT1G meets all electrical and mechanical equivalence criteria and is therefore a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The SZSMF12CT1G is a direct electrical and mechanical equivalent to the SMF12CT1G. Both devices are manufactured by onsemi, share identical electrical specifications, and are housed in the same 6-TSSOP package. Both maintain ROHS3 compliance and REACH unaffected status.

The SZSMF12CT1G carries AEC-Q101 automotive qualification and automotive-grade designation, which represents an enhanced qualification level compared to the general-purpose SMF12CT1G. This additional qualification does not alter electrical performance but indicates the substitute has undergone automotive-level reliability testing.

Selection between these parts depends on application requirements: the SMF12CT1G is suitable for general-purpose applications, while the SZSMF12CT1G is appropriate for automotive or mission-critical applications requiring AEC-Q101 certification.

Frequently Asked Questions (FAQ)

Q: Can SZSMF12CT1G replace SMF12CT1G in existing designs?

A: Yes. The SZSMF12CT1G is electrically and mechanically equivalent. All critical parameters including voltage ratings, current handling, clamping characteristics, and package dimensions are identical. Direct substitution is possible without circuit modification.

Q: What is the difference between SMF12CT1G and SZSMF12CT1G?

A: The primary difference is qualification level. SZSMF12CT1G carries AEC-Q101 automotive qualification and automotive-grade designation. Electrical specifications and package are identical.

Q: Are both parts available in the same package?

A: Yes. Both SMF12CT1G and SZSMF12CT1G are supplied in 6-TSSOP (SC-88/SOT-363) surface mount package with identical pin configuration and footprint.

Q: Do these parts have the same operating temperature range?

A: Yes. Both devices operate across -40°C to 125°C junction temperature range.

Q: Are both parts RoHS compliant?

A: Yes. Both SMF12CT1G and SZSMF12CT1G are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Q: Which part should I select for automotive applications?

A: SZSMF12CT1G is the appropriate choice for automotive applications due to AEC-Q101 qualification and automotive-grade designation.