BZX84C6V2-E3-18 Equivalent & Substitute Parts

Part Overview

The BZX84C6V2-E3-18 is a 6.2 V Zener diode rated at 300 mW in a surface mount SOT-23-3 package, manufactured by Vishay General Semiconductor - Diodes Division. This component is classified as Active and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and packaging standards. Alternative parts may be required due to inventory availability, lead time considerations, or specific manufacturing process requirements.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	6.2 V
Tolerance	±5%
Power - Max	300 mW
Impedance (Max)	10 Ohms
Current - Reverse Leakage @ Vr	3 µA @ 4 V
Operating Temperature	-55°C ~ 150°C
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the BZX84C6V2-E3-18 are classified based on the following criteria:

Primary Substitution Parameters:

Voltage - Zener (Nom): 6.2 V (exact match required)
Power - Max: 300 mW (exact match required)
Package / Case: SOT-23-3 (exact match required)
Impedance (Max): 10 Ohms (exact match required)
Current - Reverse Leakage @ Vr: 3 µA @ 4 V (exact match required)
Operating Temperature Range: -55°C ~ 150°C (exact match required)
Mounting Type: Surface Mount (exact match required)

Tolerance Variations: Parts with ±2% tolerance (BZX84B series) are tighter tolerance equivalents and are fully substitutable for the ±5% tolerance specification of the BZX84C6V2-E3-18.

Packaging Variations: Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging formats are interchangeable for component selection purposes, with differences only in supply format.

Product Status Considerations: Active status parts are preferred for new designs. Obsolete status parts (marked with Automotive grade and AEC-Q101 qualification) remain functionally equivalent but may have restricted availability.

Manufacturer Variations: Parts from Diodes Incorporated and onsemi are included as cross-manufacturer equivalents, provided all electrical and mechanical parameters match the primary specifications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Temp Range (°C)	Product Status	Grade
BZX84C6V2-E3-18	Vishay	6.2	±5%	300	10	-55 ~ 150	Active	Standard
BZX84B6V2-E3-08	Vishay	6.2	±2%	300	10	-55 ~ 150	Active	Standard
BZX84B6V2-E3-18	Vishay	6.2	±2%	300	10	-55 ~ 150	Active	Standard
BZX84B6V2-G3-08	Vishay	6.2	±2%	300	10	-55 ~ 150	Active	Standard
BZX84B6V2-HE3-08	Vishay	6.2	±2%	300	10	-55 ~ 150	Obsolete	Automotive
BZX84C6V2-E3-08	Vishay	6.2	±5%	300	10	-55 ~ 150	Active	Standard
BZX84C6V2-G3-08	Vishay	6.2	±5%	300	10	-55 ~ 150	Active	Standard
BZX84C6V2-HE3-18	Vishay	6.2	±5%	300	10	-55 ~ 150	Obsolete	Automotive
BZX84B6V2-7-F	Diodes Incorporated	6.2	±2%	300	10	-65 ~ 150	Active	Standard
BZX84B6V2Q-7-F	Diodes Incorporated	6.2	±2%	300	10	-65 ~ 150	Active	Automotive
BZX84C6V2LT3G	onsemi	6.2	±6%	225	10	-65 ~ 150	Active	Standard

Engineering Selection Recommendations

Preferred Substitutes (Active Status, Standard Grade):

BZX84B6V2-E3-18 and BZX84B6V2-E3-08 from Vishay are direct parametric equivalents with improved ±2% tolerance specification compared to the ±5% tolerance of the BZX84C6V2-E3-18. These parts maintain identical electrical performance and are recommended for applications requiring tighter voltage regulation.

BZX84C6V2-E3-08 and BZX84C6V2-G3-08 are exact electrical equivalents with matching ±5% tolerance and are suitable for direct substitution where packaging format (Cut Tape vs. Tape & Reel) is not a constraint.

Cross-Manufacturer Alternatives (Active Status):

BZX84B6V2-7-F from Diodes Incorporated provides ±2% tolerance with extended lower operating temperature limit (-65°C vs. -55°C). This part is suitable for applications requiring wider temperature performance.

BZX84B6V2Q-7-F from Diodes Incorporated offers automotive-grade qualification (AEC-Q101) with ±2% tolerance and extended temperature range, appropriate for automotive applications.

Limited Substitution (Power Derating Required):

BZX84C6V2LT3G from onsemi has reduced maximum power rating (225 mW vs. 300 mW) and ±6% tolerance. This part is substitutable only in applications where the 300 mW power specification is not fully utilized.

Obsolete Status Parts (Not Recommended for New Designs):

BZX84B6V2-HE3-08 and BZX84C6V2-HE3-18 are marked as Obsolete. While functionally equivalent, these parts should not be selected for new designs due to restricted availability and potential supply discontinuation.

Frequently Asked Questions (FAQ)

Q: Can BZX84B6V2-E3-18 replace BZX84C6V2-E3-18 in my circuit?

A: Yes. The BZX84B6V2-E3-18 is a direct parametric equivalent with identical electrical specifications (6.2 V, 300 mW, SOT-23-3) and improved tolerance (±2% vs. ±5%). All other parameters including impedance, leakage current, and operating temperature range are identical.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging?

A: Both packaging formats contain the same component. Tape & Reel is supplied in continuous reel format for automated assembly. Cut Tape & Digi-Reel® is supplied in cut tape segments. The electrical and mechanical specifications are identical; the difference is only in supply format and handling.

Q: Can I use BZX84C6V2LT3G as a substitute if my application uses less than 225 mW?

A: The BZX84C6V2LT3G has a maximum power rating of 225 mW compared to 300 mW for the BZX84C6V2-E3-18. Substitution is possible only if your circuit design ensures power dissipation does not exceed 225 mW under all operating conditions. The ±6% tolerance is also wider than the original ±5% specification.

Q: Are Diodes Incorporated parts (BZX84B6V2-7-F) compatible with my design using Vishay parts?

A: Yes. The BZX84B6V2-7-F from Diodes Incorporated is a cross-manufacturer equivalent with matching 6.2 V nominal voltage, 300 mW power rating, ±2% tolerance, and SOT-23-3 package. The extended lower temperature limit (-65°C vs. -55°C) provides additional margin for cold environment operation.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. Parts marked with this qualification (such as BZX84B6V2Q-7-F) have undergone additional testing and screening for automotive applications. These parts are suitable for use in automotive circuits but are not required for general industrial or consumer applications.

Q: Why would I choose an Obsolete part if Active alternatives exist?

A: Obsolete parts should not be selected for new designs. However, existing designs already using obsolete parts may continue to source them during the remaining availability window. For new designs or redesigns, Active status parts such as BZX84B6V2-E3-18 or BZX84C6V2-E3-08 are the appropriate choice.

Q: Is the operating temperature range difference between -55°C and -65°C significant?

A: The difference is significant only if your application requires operation below -55°C. For applications with minimum operating temperature of -55°C or higher, both temperature ranges are equivalent. Diodes Incorporated parts (BZX84B6V2-7-F, BZX84B6V2Q-7-F) and onsemi parts (BZX84C6V2LT3G) extend the lower limit to -65°C, providing additional margin for cold environment applications.

Q: Can I mix different manufacturers' parts in the same circuit board?

A: Yes. All listed substitute parts meet identical electrical specifications for the 6.2 V, 300 mW, SOT-23-3 Zener diode function. Mixing manufacturers is acceptable from an electrical standpoint. However, for manufacturing consistency and supply chain management, it is common practice to standardize on a single manufacturer per design.

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