BZX84J-B6V8,115 Equivalent & Substitute Parts

Part Overview

The BZX84J-B6V8,115 is a 6.8 V Zener diode manufactured by Nexperia USA Inc., rated for 550 mW maximum power dissipation in a surface mount SOD-323F package. This component is classified as an active product with automotive-grade qualification (AEC-Q101) and is ROHS3 compliant. The device operates across a temperature range of -65°C to 150°C with ±2% voltage tolerance and is suitable for voltage regulation and protection applications in automotive and industrial circuits. Equivalent and substitute parts are identified based on matching nominal Zener voltage, package compatibility, operating temperature range, and power rating specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	6.8	V
Tolerance	±2%	-
Power - Max	550	mW
Impedance (Max)	15	Ohms
Current - Reverse Leakage @ Vr	2	µA @ 4 V
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 100 mA
Operating Temperature	-65 to 150	°C
Mounting Type	Surface Mount	-
Package / Case	SOD-323F	-
Grade	Automotive	-
Qualification	AEC-Q101	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the BZX84J-B6V8,115 are selected based on the following critical parameters:

Primary Matching Criteria:

Nominal Zener voltage of 6.8 V
Surface mount mounting type
Operating temperature range of -65°C to 150°C
ROHS3 compliance and RoHS status alignment
Moisture Sensitivity Level (MSL) of 1 (Unlimited)

Secondary Compatibility Factors:

Package compatibility: SOD-323F, SOD-323, or SOD-523 packages
Power rating: Minimum 100 mW; parts rated 200 mW to 550 mW are functionally compatible
Voltage tolerance: ±2% to ±6% acceptable range
Impedance (Max): 5 to 15 Ohms
Reverse leakage current: 100 nA to 2 µA range

Substitutes are grouped by package type and power rating to facilitate selection based on circuit requirements and thermal constraints.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Impedance (Max)	Reverse Leakage @ Vr	Operating Temp	Package	RoHS Status
BZX84J-B6V8,115	Nexperia USA Inc.	6.8 V	±2%	550 mW	15 Ohms	2 µA @ 4 V	-65 to 150°C	SOD-323F	ROHS3
BZT52-B6V8S_R1_00001	Panjit International Inc.	6.8 V	±2.06%	200 mW	8 Ohms	100 nA @ 3 V	-55 to 150°C	SOD-323F	ROHS3
BZT52C6V8S-TP	Micro Commercial Co	6.8 V	±6%	200 mW	15 Ohms	2 µA @ 4 V	-65 to 150°C	SOD-323	ROHS3
BZT52C6V8T-7	Diodes Incorporated	6.8 V	±6%	300 mW	15 Ohms	2 µA @ 4 V	-65 to 150°C	SOD-523	ROHS3
BZT52C6V8T-TP	Micro Commercial Co	6.8 V	±5%	100 mW	15 Ohms	2 µA @ 4 V	-65 to 150°C	SOD-523	ROHS3
DDZ9692T-7	Diodes Incorporated	6.8 V	±5%	150 mW	Not specified	100 nA @ 5.1 V	-65 to 150°C	SOD-523	ROHS3
MM3Z6V8B	onsemi	6.8 V	±2%	200 mW	14 Ohms	1.8 µA @ 4 V	-65 to 150°C	SOD-323F	ROHS3
MM3Z6V8C	Fairchild Semiconductor	6.8 V	±5%	200 mW	14 Ohms	1.8 µA @ 4 V	-65 to 150°C	SOD-323F	ROHS3
MM5Z6V8T1G	onsemi	6.8 V	±5.9%	500 mW	15 Ohms	2 µA @ 4 V	-65 to 150°C	SOD-523	ROHS3
MMXZ5235B-TP	Micro Commercial Co	6.8 V	±5%	200 mW	5 Ohms	3 µA @ 5 V	-55 to 150°C	SOD-323	ROHS3

Engineering Selection Recommendations

Direct Equivalents (SOD-323F Package, Automotive Grade):

MM3Z6V8B (onsemi) is the closest functional equivalent to the BZX84J-B6V8,115. Both devices feature identical 6.8 V nominal voltage, ±2% tolerance, SOD-323F package, and -65°C to 150°C operating temperature range. The MM3Z6V8B is rated for 200 mW versus the original 550 mW, making it suitable for applications with lower power dissipation requirements. Both parts are ROHS3 compliant and carry MSL 1 rating.

MM3Z6V8C (Fairchild Semiconductor) provides an alternative in the same package with ±5% tolerance and 200 mW power rating. This part is suitable where voltage tolerance of ±5% is acceptable.

Higher Power Alternatives (SOD-523 Package):

MM5Z6V8T1G (onsemi) offers 500 mW power rating in SOD-523 package, approaching the original 550 mW specification. This part maintains the -65°C to 150°C temperature range and ROHS3 compliance. The SOD-523 package provides improved thermal characteristics for higher power applications.

BZT52C6V8T-7 (Diodes Incorporated) provides 300 mW in SOD-523 package with -65°C to 150°C operating range and ROHS3 compliance.

Lower Power Alternatives (SOD-323 Package):

BZT52C6V8S-TP (Micro Commercial Co) offers 200 mW in SOD-323 package with full temperature range coverage (-65°C to 150°C) and ROHS3 compliance. Voltage tolerance is ±6%.

BZT52-B6V8S_R1_00001 (Panjit International Inc.) provides 200 mW in SOD-323F package with ±2.06% tolerance. Operating temperature range is -55°C to 150°C, which is narrower than the original specification.

Selection Criteria:

All substitute parts listed maintain ROHS3 compliance, MSL 1 rating, and 6.8 V nominal Zener voltage. Selection between alternatives depends on specific circuit power requirements, package space constraints, and thermal management capabilities. Parts with SOD-323F package are pin-compatible with the original BZX84J-B6V8,115. Parts with SOD-523 package require PCB layout modification but offer improved power handling. All listed substitutes are active products with current manufacturing status.

Frequently Asked Questions (FAQ)

Q: Can I use MM3Z6V8B as a direct replacement for BZX84J-B6V8,115?

A: MM3Z6V8B is functionally compatible for applications where 200 mW power dissipation is sufficient. Both parts share identical 6.8 V nominal voltage, ±2% tolerance, SOD-323F package, and -65°C to 150°C operating temperature. The primary difference is power rating: MM3Z6V8B is rated 200 mW versus the original 550 mW. If your circuit dissipates less than 200 mW in the Zener diode, this substitution is valid. If higher power dissipation is required, select MM5Z6V8T1G (500 mW) or BZT52C6V8T-7 (300 mW).

Q: What is the difference between SOD-323F and SOD-523 packages?

A: SOD-323F and SOD-323 are physically similar small outline packages suitable for space-constrained applications. SOD-523 is a smaller package with improved thermal performance due to its design. Parts in SOD-323F package (BZX84J-B6V8,115, MM3Z6V8B, MM3Z6V8C) are pin-compatible and require no PCB layout changes. Parts in SOD-523 package (MM5Z6V8T1G, BZT52C6V8T-7, BZT52C6V8T-TP, DDZ9692T-7) require PCB footprint modification but offer better thermal characteristics for higher power applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original BZX84J-B6V8,115 specifications.

Q: What is the minimum operating temperature for substitute parts?

A: Most substitute parts operate from -65°C to 150°C, matching the original specification. Two exceptions are BZT52-B6V8S_R1_00001 and MMXZ5235B-TP, which operate from -55°C to 150°C. If your application requires operation below -55°C, select parts with -65°C minimum rating.

Q: Can I use a lower power-rated Zener diode as a substitute?

A: Lower power-rated substitutes (100 mW to 300 mW) are valid only if your circuit's actual power dissipation in the Zener diode does not exceed the substitute part's rating. Exceeding the power rating causes device failure. If your circuit requires 550 mW dissipation, use MM5Z6V8T1G (500 mW) or higher. For circuits dissipating 200 mW or less, parts like MM3Z6V8B, BZT52C6V8S-TP, or MMXZ5235B-TP are suitable.

Q: What tolerance range should I select?

A: The original BZX84J-B6V8,115 specifies ±2% tolerance. Substitutes with ±2% or ±2.06% tolerance (MM3Z6V8B, BZT52-B6V8S_R1_00001) provide equivalent precision. Parts with ±5% or ±6% tolerance (BZT52C6V8S-TP, BZT52C6V8T-7, BZT52C6V8T-TP, DDZ9692T-7, MM3Z6V8C, MM5Z6V8T1G, MMXZ5235B-TP) are acceptable where voltage regulation tolerance of ±5% to ±6% meets circuit requirements.

Q: Which substitute offers the closest electrical match to the original part?

A: MM3Z6V8B (onsemi) provides the closest match: identical 6.8 V voltage, ±2% tolerance, SOD-323F package, -65°C to 150°C temperature range, and ROHS3 compliance. The only difference is 200 mW versus 550 mW power rating. For applications requiring higher power handling, MM5Z6V8T1G (500 mW) in SOD-523 package is the closest alternative.

Q: Are there automotive-grade alternatives available?

A: The original BZX84J-B6V8,115 carries automotive-grade qualification (AEC-Q101). While not all substitute parts explicitly list AEC-Q101 qualification in the provided specifications, all listed substitutes are active products with ROHS3 compliance and MSL 1 rating suitable for automotive applications. Verify AEC-Q101 qualification with the manufacturer if automotive certification is a mandatory requirement for your application.

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