MMBZ27VCLT1G Equivalent & Substitute Parts

Part Overview

The MMBZ27VCLT1G is an active Transient Voltage Suppressor (TVS) diode manufactured by onsemi, designed for general-purpose transient protection applications. This unidirectional zener diode operates with a 22V reverse standoff voltage and provides 38V maximum clamping voltage at 1A peak pulse current. The device is packaged in SOT-23-3 (TO-236) surface mount configuration and is ROHS3 compliant with unlimited moisture sensitivity rating.

Substitute parts are identified when electrical parameters and mechanical compatibility align with the original specification, enabling direct replacement in circuit designs without functional degradation.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	22V	V
Voltage - Breakdown (Min)	25.65V	V
Voltage - Clamping (Max) @ Ipp	38V	V
Current - Peak Pulse (10/1000µs)	1A	A
Power - Peak Pulse	40W	W
Operating Temperature Range	-55°C to 150°C	°C
Package / Case	SOT-23-3 (TO-236)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical parameter alignment:

Direct Substitutes maintain identical electrical specifications across all critical parameters: 22V reverse standoff voltage, 25.65V minimum breakdown voltage, 38V maximum clamping voltage, and 1A peak pulse current. These parts are mechanically and electrically interchangeable with the MMBZ27VCLT1G.

Similar Substitutes share the same package and general application category but deviate in one or more electrical parameters. These parts may be suitable for applications with relaxed specifications but require circuit-level validation.

The following key parameters determine substitution eligibility:

Voltage - Reverse Standoff (Typ): 22V
Voltage - Breakdown (Min): 25.65V
Voltage - Clamping (Max) @ Ipp: 38V
Current - Peak Pulse (10/1000µs): 1A
Package / Case: SOT-23-3 (TO-236)

Parameter Comparison

Part Number	Manufacturer	Reverse Standoff (V)	Breakdown Min (V)	Clamping Max (V)	Peak Pulse (A)	Power Peak (W)	Temp Range (°C)	Package	Substitution Type
MMBZ27VCLT1G	onsemi	22	25.65	38	1	40	-55 to 150	SOT-23-3	Reference
SZMMBZ27VCLT1G	onsemi	22	25.65	38	1	40	-55 to 150	SOT-23-3	Direct
MMBZ27VCL,215	Nexperia USA Inc.	22	25.65	38	1	40	-55 to 150	SOT-23-3	Direct
MMBZ27VCL-7-F	Diodes Incorporated	22	25.65	38	1	40	-65 to 150	SOT-23-3	Direct
ESDA25L	STMicroelectronics	24	25	—	—	300	-40 to 125	SOT-23-3	Similar
PJMBZ27V-AU_R1_000A1	Panjit International Inc.	22	25.65	36	4	25	-55 to 125	SOT-23-3	Similar

Engineering Selection Recommendations

Direct Substitutes (SZMMBZ27VCLT1G, MMBZ27VCL,215, MMBZ27VCL-7-F) are electrically and mechanically equivalent to the MMBZ27VCLT1G. All three maintain identical voltage specifications and peak pulse current ratings. Selection among direct substitutes may be based on availability, packaging format (Cut Tape vs. Tape & Reel), or inventory levels. MMBZ27VCL-7-F offers an extended lower operating temperature limit (-65°C vs. -55°C), providing additional margin for extreme cold environments.

Similar Substitutes require application-specific evaluation:

ESDA25L (STMicroelectronics) features a higher reverse standoff voltage (24V) and significantly higher peak pulse power rating (300W). This part is suitable only for applications where the 24V standoff voltage is acceptable and where the higher power dissipation capability provides design margin.

PJMBZ27V-AU_R1_000A1 (Panjit International Inc.) maintains the 22V standoff voltage but reduces the clamping voltage to 36V while increasing peak pulse current to 4A. The lower operating temperature maximum (125°C vs. 150°C) and reduced peak pulse power (25W) require verification against circuit thermal and transient requirements.

All substitute parts listed are ROHS3 compliant and carry unlimited moisture sensitivity rating, matching the original part's environmental compliance profile.

Frequently Asked Questions (FAQ)

Q: Can SZMMBZ27VCLT1G replace MMBZ27VCLT1G directly?

A: Yes. SZMMBZ27VCLT1G is a direct substitute with identical electrical parameters and SOT-23-3 packaging. The primary difference is the automotive-grade qualification (AEC-Q101) and higher inventory availability.

Q: What is the difference between MMBZ27VCL,215 and MMBZ27VCL-7-F?

A: Both are direct electrical substitutes with identical voltage and current ratings. MMBZ27VCL,215 is manufactured by Nexperia USA Inc. and supplied in Tape & Reel format. MMBZ27VCL-7-F is manufactured by Diodes Incorporated and offers an extended lower operating temperature range (-65°C vs. -55°C).

Q: Is ESDA25L compatible with MMBZ27VCLT1G applications?

A: ESDA25L shares the same SOT-23-3 package but operates at 24V reverse standoff voltage instead of 22V. Compatibility depends on circuit design tolerance for the higher standoff voltage. The significantly higher power rating (300W) may provide additional protection margin in high-energy transient environments.

Q: Why does PJMBZ27V-AU_R1_000A1 have different electrical specifications?

A: PJMBZ27V-AU_R1_000A1 is classified as a similar substitute due to variations in clamping voltage (36V vs. 38V), peak pulse current (4A vs. 1A), and operating temperature maximum (125°C vs. 150°C). This part is suitable only when circuit specifications permit these parameter deviations.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed—SZMMBZ27VCLT1G, MMBZ27VCL,215, MMBZ27VCL-7-F, ESDA25L, and PJMBZ27V-AU_R1_000A1—are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Q: What packaging formats are available for direct substitutes?

A: SZMMBZ27VCLT1G is supplied in Cut Tape (CT) & Digi-Reel format. MMBZ27VCL,215 and MMBZ27VCL-7-F are supplied in Tape & Reel (TR) format. Packaging selection depends on assembly process requirements and volume specifications.

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