BZX84C8V2_D87Z Equivalent & Substitute Parts

Part Overview

The BZX84C8V2_D87Z is an 8.2 V Zener diode manufactured by onsemi, rated for 350 mW power dissipation in a surface mount SOT-23-3 package. This part is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications. Substitute parts must maintain electrical compatibility across voltage regulation, power handling, and thermal operating ranges while accommodating packaging and sourcing constraints.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	8.2	V
Tolerance	±6%	—
Power - Maximum	350	mW
Impedance (Maximum)	15	Ohms
Current - Reverse Leakage @ Vr	700	nA @ 5 V
Voltage - Forward (Maximum) @ If	900	mV @ 10 mA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—

Substitute Part Grouping Explanation

Substitution of the BZX84C8V2_D87Z is determined by the following critical parameters:

Electrical Compatibility Requirements:

Zener voltage must be 8.2 V nominal
Tolerance range must accommodate circuit design margins
Maximum power dissipation must equal or exceed 350 mW
Impedance (Zzt) must not exceed 15 Ohms
Reverse leakage current and forward voltage characteristics must remain within specified limits
Operating temperature range must span -55°C to 150°C minimum

Mechanical Compatibility Requirements:

Package must be SOT-23-3 (TO-236-3, SC-59) for direct PCB footprint compatibility
Surface mount mounting type is mandatory

Regulatory and Sourcing Considerations:

Product status (active vs. obsolete) affects long-term availability
RoHS3 compliance and REACH status ensure regulatory alignment
Automotive qualification (AEC-Q101) applies to specific substitute variants

Substitute parts are grouped into three categories: direct electrical equivalents with identical or superior power ratings, variants with reduced power ratings suitable for lower-dissipation applications, and automotive-grade alternatives with enhanced reliability certifications.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Ir @ Vr	Vf @ If	Temp Range (°C)	Status	Package
BZX84C8V2_D87Z	onsemi	8.2	±6%	350	15	700 nA @ 5 V	900 mV @ 10 mA	-55 to 150	Obsolete	SOT-23-3
BZX84C8V2LT1G	onsemi	8.2	±5%	250	15	700 nA @ 5 V	900 mV @ 10 mA	-65 to 150	Active	SOT-23-3
BZX84B8V2LT1G	onsemi	8.2	±2%	225	15	700 nA @ 5 V	900 mV @ 10 mA	-65 to 150	Active	SOT-23-3
SZBZX84C8V2LT1G	onsemi	8.2	±5%	225	15	700 nA @ 5 V	900 mV @ 10 mA	-65 to 150	Active	SOT-23-3
BZX84C8V2-7-F	Diodes Incorporated	8.2	±6%	300	15	700 nA @ 5 V	900 mV @ 10 mA	-65 to 150	Active	SOT-23-3
BZX84-A8V2,215	Nexperia USA Inc.	8.2	±1%	250	15	700 nA @ 5 V	900 mV @ 10 mA	-65 to 150	Active	SOT-23-3
BZX84-C8V2,215	Nexperia USA Inc.	8.2	±5%	250	15	700 nA @ 5 V	900 mV @ 10 mA	-65 to 150	Active	SOT-23-3
BZX84-C8V2,235	Nexperia USA Inc.	8.2	±5%	250	15	700 nA @ 5 V	900 mV @ 10 mA	-65 to 150	Active	SOT-23-3
MMBZ5237B-7-F	Diodes Incorporated	8.2	±5%	350	8	3 µA @ 6.5 V	900 mV @ 10 mA	-65 to 150	Active	SOT-23-3
MMBZ5237B-TP	Micro Commercial Co	8.2	±5%	350	8	3 µA @ 6.5 V	900 mV @ 10 mA	-55 to 150	Active	SOT-23-3
MMBZ5237BQ-13-F	Diodes Incorporated	8.2	±5%	350	8	3 µA @ 6.5 V	900 mV @ 10 mA	-65 to 150	Active	SOT-23-3

Engineering Selection Recommendations

Direct Replacement (Equivalent Power Rating):

The BZX84C8V2LT1G (onsemi) and BZX84C8V2-7-F (Diodes Incorporated) serve as primary substitutes. Both maintain the 8.2 V nominal voltage and 15 Ohm impedance specification. The BZX84C8V2LT1G offers 250 mW power rating with ±5% tolerance and active product status. The BZX84C8V2-7-F provides 300 mW power rating with ±6% tolerance matching the original specification. Both support the extended operating temperature range of -65°C to 150°C, exceeding the original -55°C minimum.

Higher Performance Alternative:

The MMBZ5237B-7-F and MMBZ5237BQ-13-F (Diodes Incorporated) and MMBZ5237B-TP (Micro Commercial Co) deliver 350 mW power rating matching the original specification. These parts feature superior impedance characteristics (8 Ohms versus 15 Ohms), resulting in tighter voltage regulation. The MMBZ5237BQ-13-F includes AEC-Q101 automotive qualification, suitable for applications requiring enhanced reliability certifications.

Precision Tolerance Alternative:

The BZX84-A8V2,215 (Nexperia USA Inc.) provides ±1% tolerance with 250 mW power rating and AEC-Q101 qualification. This variant is appropriate for applications requiring tighter voltage regulation margins.

Reduced Power Rating Options:

The BZX84B8V2LT1G (onsemi) and SZBZX84C8V2LT1G (onsemi) offer 225 mW power ratings with ±2% and ±5% tolerances respectively. The SZBZX84C8V2LT1G includes AEC-Q101 automotive qualification. These variants are suitable for lower-dissipation circuit designs where full 350 mW capacity is not required.

All recommended substitutes maintain SOT-23-3 package compatibility, RoHS3 compliance, and REACH unaffected status. Selection should prioritize active product status for long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can BZX84C8V2LT1G replace BZX84C8V2_D87Z directly?

A: Yes. The BZX84C8V2LT1G maintains identical 8.2 V nominal voltage, 15 Ohm impedance, and SOT-23-3 package. The 250 mW power rating is lower than the original 350 mW specification. This substitution is valid for applications where circuit power dissipation does not exceed 250 mW. The part is active status with extended temperature range (-65°C to 150°C).

Q: What is the difference between BZX84C8V2-7-F and MMBZ5237B-7-F?

A: Both parts maintain 8.2 V nominal voltage and 350 mW power rating in SOT-23-3 package. The MMBZ5237B-7-F features lower impedance (8 Ohms versus 15 Ohms) and higher reverse leakage current (3 µA @ 6.5 V versus 700 nA @ 5 V). Lower impedance provides superior voltage regulation stability. The BZX84C8V2-7-F is manufactured by Diodes Incorporated; MMBZ5237B-7-F is also Diodes Incorporated. Selection depends on whether tighter voltage regulation (MMBZ5237B-7-F) or lower leakage current (BZX84C8V2-7-F) is prioritized.

Q: Are automotive-qualified alternatives available?

A: Yes. The MMBZ5237BQ-13-F (Diodes Incorporated), SZBZX84C8V2LT1G (onsemi), BZX84-A8V2,215 (Nexperia USA Inc.), BZX84-C8V2,215 (Nexperia USA Inc.), and BZX84-C8V2,235 (Nexperia USA Inc.) all carry AEC-Q101 qualification. These parts are suitable for automotive and high-reliability applications.

Q: Does package compatibility affect substitution?

A: Yes. All listed substitutes use SOT-23-3 (TO-236-3, SC-59) package, ensuring direct PCB footprint compatibility. Package compatibility is a mandatory requirement for substitution. No alternative packages are listed for this application.

Q: What tolerance range should I select?

A: The original BZX84C8V2_D87Z specifies ±6% tolerance. Substitutes range from ±1% (BZX84-A8V2,215) to ±6% (BZX84C8V2-7-F). Tighter tolerance (±1% to ±2%) is appropriate for precision voltage regulation circuits. Standard tolerance (±5% to ±6%) is suitable for general-purpose applications. Circuit design margins determine the minimum acceptable tolerance.

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

A: Substitution with lower power ratings (225 mW or 250 mW) is valid only if circuit analysis confirms that actual power dissipation remains below the substitute part's rating. The BZX84B8V2LT1G (225 mW) and BZX84C8V2LT1G (250 mW) are acceptable for reduced-dissipation designs. Exceeding the power rating causes thermal failure and circuit malfunction.

Q: What is the temperature operating range difference?

A: The original part operates -55°C to 150°C. Most active substitutes extend the minimum to -65°C, providing wider low-temperature operation. The MMBZ5237B-TP maintains -55°C to 150°C matching the original. Extended temperature range (-65°C) is beneficial for applications in extreme cold environments.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

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