MMBZ12VALT1 Equivalent & Substitute Parts

Part Overview

The MMBZ12VALT1 is a Transient Voltage Suppressor (TVS) diode designed for general-purpose overvoltage protection in surface-mount applications. This unidirectional zener diode features an 8.5V reverse standoff voltage and 17V maximum clamping voltage, with a peak pulse current rating of 2.35A. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	8.5V
Voltage - Breakdown (Min)	11.4V
Voltage - Clamping (Max) @ Ipp	17V
Current - Peak Pulse (10/1000µs)	2.35A
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

Substitute Part Grouping Explanation

Substitution for the MMBZ12VALT1 is determined by electrical and mechanical parameter alignment across the following criteria:

Electrical Parameters (Critical):

Voltage - Reverse Standoff: 8.5V
Voltage - Breakdown (Min): 11.4V
Voltage - Clamping (Max) @ Ipp: 17V
Current - Peak Pulse (10/1000µs): 2.35A
Power - Peak Pulse: 40W
Unidirectional Channels: 2

Mechanical Parameters (Critical):

Package / Case: TO-236-3, SC-59, SOT-23-3
Mounting Type: Surface Mount

Environmental Parameters:

Operating Temperature Range: -55°C ~ 150°C

Parts meeting all electrical and mechanical parameters are classified as direct substitutes. Variations in packaging format (bulk vs. tape & reel) do not affect electrical compatibility.

Parameter Comparison

Parameter	MMBZ12VALT1	MMBZ12VALT1G	MMBZ12VAL,215
Manufacturer	onsemi	onsemi	Nexperia USA Inc.
Voltage - Reverse Standoff (Typ)	8.5V	8.5V	8.5V (Max)
Voltage - Breakdown (Min)	11.4V	11.4V	11.4V
Voltage - Clamping (Max) @ Ipp	17V	17V	17V
Current - Peak Pulse (10/1000µs)	2.35A	2.35A	2.35A
Power - Peak Pulse	40W	40W	40W
Operating Temperature	-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
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Unidirectional Channels	2	2	2
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Bulk	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

MMBZ12VALT1G (onsemi) is the primary direct substitute for the obsolete MMBZ12VALT1. Both parts are manufactured by onsemi and share identical electrical specifications and package geometry. The MMBZ12VALT1G maintains active product status and is ROHS3 compliant, addressing regulatory requirements. This part is available in tape & reel packaging format with significantly higher inventory availability (65,400 pcs).

MMBZ12VAL,215 (Nexperia USA Inc.) is an equivalent substitute meeting all electrical and mechanical parameters. Manufactured by Nexperia USA Inc., this part provides an alternative source for the same functional specification. The MMBZ12VAL,215 includes AEC-Q101 automotive qualification and is ROHS3 compliant. Capacitance specification (110pF @ 1MHz) is provided for this variant. This part is also available in tape & reel packaging with active product status.

Both substitute parts are electrically and mechanically interchangeable with the original MMBZ12VALT1 and support the same circuit protection requirements.

Frequently Asked Questions (FAQ)

Q: Can MMBZ12VALT1G be used as a direct replacement for MMBZ12VALT1?

A: Yes. Both parts share identical electrical specifications (8.5V standoff, 17V clamping, 2.35A peak pulse current) and package geometry (SOT-23-3). The primary difference is product status and compliance certification. MMBZ12VALT1G is active and ROHS3 compliant.

Q: What is the difference between MMBZ12VALT1 and MMBZ12VALT1G?

A: The parts are electrically identical. MMBZ12VALT1G is the active production variant with ROHS3 compliance. MMBZ12VALT1 is obsolete and RoHS non-compliant. Packaging format differs: MMBZ12VALT1 is supplied in bulk; MMBZ12VALT1G is supplied in tape & reel.

Q: Is MMBZ12VAL,215 compatible with MMBZ12VALT1?

A: Yes. MMBZ12VAL,215 meets all electrical and mechanical requirements for substitution. It is manufactured by Nexperia USA Inc. and includes automotive-grade qualification (AEC-Q101). All voltage and current parameters are identical.

Q: Does packaging format (bulk vs. tape & reel) affect electrical performance?

A: No. Packaging format is a procurement and handling specification only. Electrical performance and circuit functionality are identical regardless of packaging format.

Q: Why is MMBZ12VALT1 marked as obsolete?

A: The original MMBZ12VALT1 has been superseded by MMBZ12VALT1G, which maintains identical electrical specifications while offering improved compliance status and active manufacturing support.

Q: Can I use MMBZ12VAL,215 in automotive applications?

A: Yes. MMBZ12VAL,215 carries AEC-Q101 automotive qualification, making it suitable for automotive circuit protection applications.

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