MMBZ33VALT3G Equivalent & Substitute Parts

Part Overview

The MMBZ33VALT3G is a transient voltage suppressor (TVS) diode manufactured by onsemi, rated for 26V reverse standoff voltage with a 46V maximum clamping voltage. This unidirectional zener diode is designed for general-purpose transient voltage suppression in surface-mount applications using the SOT-23-3 package. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	26V
Voltage - Breakdown (Min)	31.35V
Voltage - Clamping (Max) @ Ipp	46V
Current - Peak Pulse (10/1000µs)	870mA
Power - Peak Pulse	40W
Operating Temperature Range	-55°C ~ 150°C
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
Unidirectional Channels	2
Type	Zener

Substitute Part Grouping Explanation

Substitution for the MMBZ33VALT3G is determined by strict equivalence across the following critical parameters:

Voltage - Reverse Standoff: 26V
Voltage - Breakdown (Min): 31.35V
Voltage - Clamping (Max) @ Ipp: 46V
Current - Peak Pulse (10/1000µs): 870mA
Power - Peak Pulse: 40W
Operating Temperature Range: -55°C ~ 150°C
Package / Case: TO-236-3, SC-59, SOT-23-3
Unidirectional Channels: 2
Type: Zener

All substitute parts listed maintain identical electrical specifications and package compatibility. Differences in product status, packaging format (Tape & Reel vs. Cut Tape), and manufacturer certifications do not affect functional interchangeability in the circuit.

Parameter Comparison

Parameter	MMBZ33VALT3G (Main)	SZMMBZ33VALT1G	MMBZ33VALT1G	MMBZ33VAL,215
Manufacturer	onsemi	onsemi	onsemi	Nexperia USA Inc.
Product Status	Obsolete	Active	Active	Active
Voltage - Reverse Standoff (Typ)	26V	26V	26V	26V (Max)
Voltage - Breakdown (Min)	31.35V	31.35V	31.35V	31.35V
Voltage - Clamping (Max) @ Ipp	46V	46V	46V	46V
Current - Peak Pulse (10/1000µs)	870mA	870mA	870mA	870mA
Power - Peak Pulse	40W	40W	40W	40W
Operating Temperature	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TA)
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Supplier Device Package	SOT-23-3 (TO-236)	SOT-23-3 (TO-236)	SOT-23-3 (TO-236)	TO-236AB
Packaging Format	Not specified	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Grade	Not specified	Automotive	Not specified	Automotive
Qualification	Not specified	AEC-Q101	Not specified	AEC-Q101
Capacitance @ Frequency	Not specified	Not specified	Not specified	45pF @ 1MHz

Engineering Selection Recommendations

All three substitute parts are functionally equivalent to the MMBZ33VALT3G based on identical electrical specifications and package compatibility. Selection among substitutes should be based on the following factors:

SZMMBZ33VALT1G (onsemi): Active product status with automotive-grade qualification (AEC-Q101) and ROHS3 compliance. Supplied in Tape & Reel format. Recommended for automotive and high-reliability applications requiring certified components.

MMBZ33VALT1G (onsemi): Active product status with ROHS3 compliance. Supplied in Cut Tape and Digi-Reel format. Suitable for general-purpose applications with flexible packaging requirements.

MMBZ33VAL,215 (Nexperia USA Inc.): Active product status with automotive-grade qualification (AEC-Q101) and ROHS3 compliance. Supplied in Tape & Reel format. Provides cross-manufacturer alternative with equivalent electrical performance and automotive certification.

Frequently Asked Questions (FAQ)

Q: Can SZMMBZ33VALT1G replace MMBZ33VALT3G directly? A: Yes. Both parts share identical electrical specifications (26V standoff, 46V clamping, 870mA peak pulse current, 40W peak power) and the same SOT-23-3 package. The primary difference is product status (active vs. obsolete) and packaging format (Tape & Reel vs. unspecified).

Q: What is the difference between MMBZ33VALT1G and SZMMBZ33VALT1G? A: Both are onsemi products with identical electrical specifications. SZMMBZ33VALT1G includes automotive-grade qualification (AEC-Q101) and is supplied in Tape & Reel format. MMBZ33VALT1G is supplied in Cut Tape and Digi-Reel format without automotive certification. Selection depends on application requirements and packaging preferences.

Q: Is MMBZ33VAL,215 from Nexperia compatible with the original onsemi part? A: Yes. MMBZ33VAL,215 maintains identical electrical specifications and package compatibility. It is manufactured by Nexperia USA Inc. and includes automotive-grade qualification (AEC-Q101), making it suitable for applications requiring cross-manufacturer alternatives.

Q: Are all substitutes ROHS3 compliant? A: Yes. All three substitute parts are ROHS3 compliant. The original MMBZ33VALT3G does not specify RoHS status.

Q: Do the substitutes support the same operating temperature range? A: Yes. All parts operate across -55°C to 150°C. The original part specifies junction temperature (TJ), while MMBZ33VAL,215 specifies ambient temperature (TA). This distinction does not affect functional equivalence.

Q: Which substitute is best for automotive applications? A: Both SZMMBZ33VALT1G and MMBZ33VAL,215 carry automotive-grade qualification (AEC-Q101), making either suitable for automotive applications. SZMMBZ33VALT1G is the onsemi automotive option, while MMBZ33VAL,215 provides a Nexperia alternative.

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