MMBZ4682-E3-08 Equivalent & Substitute Parts

Part Overview

The MMBZ4682-E3-08 is a Zener diode rated at 2.7 V nominal voltage with 350 mW maximum power dissipation in a surface mount SOT-23-3 package. Manufactured by Vishay General Semiconductor - Diodes Division, this component is classified as obsolete. Due to its obsolete status and limited availability relative to active alternatives, equivalent substitute parts are necessary to maintain design continuity and ensure supply chain reliability for new production and ongoing support applications.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	2.7 V
Tolerance	±5%
Power - Max	350 mW
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Operating Temperature	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MMBZ4682-E3-08 is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 2.7 V nominal
Package type: SOT-23-3 (TO-236-3, SC-59)
Mounting type: Surface Mount
RoHS3 compliance
MSL rating: 1 (Unlimited)

Secondary Compatibility Factors:

Power dissipation rating (350 mW or higher)
Voltage tolerance (±5% or tighter)
Operating temperature range (-55°C to 150°C minimum)
Reverse leakage current specifications

All substitute parts listed maintain the core electrical specifications (2.7 V Zener voltage, SOT-23-3 package, surface mount configuration) and regulatory compliance (RoHS3, REACH Unaffected, EAR99 classification). Variations in power rating, impedance, and reverse leakage current are noted where they differ from the original specification.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Package	Temp Range	Product Status
MMBZ4682-E3-08	Vishay General Semiconductor	2.7 V	±5%	350 mW	SOT-23-3	-55°C ~ 150°C	Obsolete
BZX84C2V7-TP	Micro Commercial Co	2.7 V	±5%	350 mW	SOT-23-3	-55°C ~ 150°C	Active
CMPZ5223B TR PBFREE	Central Semiconductor Corp	2.7 V	±5%	350 mW	SOT-23-3	-65°C ~ 150°C	Active
CZRT5223B-G	Comchip Technology	2.7 V	±5%	300 mW	SOT-23-3	-65°C ~ 150°C	Active
MMBZ5223B-7-F	Diodes Incorporated	2.7 V	±5%	350 mW	SOT-23-3	-65°C ~ 150°C	Active
SZBZX84C2V7ET1G	onsemi	2.7 V	±7%	225 mW	SOT-23-3	-65°C ~ 150°C	Active

Engineering Selection Recommendations

Primary Substitutes (Full Electrical Equivalence):

BZX84C2V7-TP, CMPZ5223B TR PBFREE, and MMBZ5223B-7-F are direct functional equivalents to the MMBZ4682-E3-08. All three maintain identical Zener voltage (2.7 V), voltage tolerance (±5%), and maximum power rating (350 mW). These parts are in active production status with established supply chains. All are RoHS3 compliant with MSL rating 1 (Unlimited).

Secondary Substitutes (Reduced Power Rating):

CZRT5223B-G provides equivalent Zener voltage and tolerance specifications but with reduced maximum power dissipation (300 mW versus 350 mW). This part is suitable for applications where the full 350 mW power budget is not required. Extended operating temperature range (-65°C to 150°C) provides additional margin.

Automotive-Grade Alternative:

SZBZX84C2V7ET1G is an AEC-Q101 qualified automotive-grade Zener diode with 2.7 V nominal voltage. This part carries a ±7% tolerance (versus ±5%) and reduced power rating (225 mW). Selection of this part is appropriate for automotive applications requiring AEC-Q101 qualification.

Compliance and Availability:

All substitute parts maintain RoHS3 compliance, REACH Unaffected status, and EAR99 classification. Inventory availability is significantly higher for active alternatives compared to the obsolete MMBZ4682-E3-08.

Frequently Asked Questions (FAQ)

Q: Can BZX84C2V7-TP directly replace MMBZ4682-E3-08 in existing designs?

A: Yes. BZX84C2V7-TP matches the MMBZ4682-E3-08 in Zener voltage (2.7 V), voltage tolerance (±5%), power rating (350 mW), and SOT-23-3 package configuration. Both operate across -55°C to 150°C. The part is in active production status.

Q: What is the difference between MMBZ5223B-7-F and CMPZ5223B TR PBFREE?

A: Both parts share identical Zener voltage (2.7 V), tolerance (±5%), and power rating (350 mW) specifications. MMBZ5223B-7-F is manufactured by Diodes Incorporated with operating temperature range -65°C to 150°C. CMPZ5223B TR PBFREE is manufactured by Central Semiconductor Corp, also with -65°C to 150°C range. Selection between these parts depends on preferred supplier and inventory availability.

Q: Is CZRT5223B-G suitable for applications requiring 350 mW power dissipation?

A: CZRT5223B-G is rated for 300 mW maximum power dissipation, which is lower than the original 350 mW specification. This part is suitable only for applications where actual power dissipation does not exceed 300 mW. For designs requiring the full 350 mW capability, select BZX84C2V7-TP, CMPZ5223B TR PBFREE, or MMBZ5223B-7-F.

Q: When should SZBZX84C2V7ET1G be selected?

A: SZBZX84C2V7ET1G is the appropriate choice for automotive applications requiring AEC-Q101 qualification. This part carries ±7% voltage tolerance and 225 mW power rating. It is not recommended for general industrial applications where the ±5% tolerance and higher power rating of other alternatives are required.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. All listed substitute parts are supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All substitute parts listed are RoHS3 compliant with MSL rating 1 (Unlimited), matching the regulatory status of the original MMBZ4682-E3-08.

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