BZX84C8V2 Equivalent & Substitute Parts

Part Overview

The BZX84C8V2 is a surface mount Zener diode manufactured by onsemi with a nominal Zener voltage of 8.2 V and maximum power dissipation of 350 mW in a SOT-23-3 package. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. Equivalent parts maintain identical electrical specifications, while substitute parts offer compatible performance within defined parameter tolerances for applications requiring 8.2 V Zener regulation.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution of the BZX84C8V2 is determined by the following critical parameters:

Primary Matching Criteria:

Voltage - Zener (Nom): 8.2 V (exact match required)
Package / Case: SOT-23-3 / TO-236-3 (mechanical and electrical compatibility)
Mounting Type: Surface Mount (assembly process compatibility)
Impedance (Max): 15 Ohms or lower (electrical performance)
Current - Reverse Leakage @ Vr: 700 nA @ 5 V or lower (leakage performance)
Voltage - Forward (Vf) (Max) @ If: 900 mV @ 10 mA or lower (forward conduction)

Secondary Compatibility Parameters:

Power - Max: 350 mW or greater (thermal capability)
Tolerance: ±6% or tighter (voltage accuracy)
Operating Temperature: -55°C to 150°C or wider range (thermal operating window)

Substitute parts are grouped by their ability to meet or exceed the primary matching criteria while maintaining compatibility with the original design specifications. Parts with identical Zener voltage, package type, and mounting configuration are considered direct substitutes. Variations in power rating, tolerance, and operating temperature range are acceptable provided they do not reduce system performance or reliability.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power Max (mW)	Zzt (Ohms)	Vf Max @ If (mV)	Temp Range (°C)	Package	Status
BZX84C8V2	onsemi	8.2	±6%	350	15	900 @ 10 mA	-55 to 150	SOT-23-3	Obsolete
BZX84B8V2LT1G	onsemi	8.2	±2%	225	15	900 @ 10 mA	-65 to 150	SOT-23-3	Active
BZX84C8V2LT1G	onsemi	8.2	±5%	250	15	900 @ 10 mA	-65 to 150	SOT-23-3	Active
SZBZX84C8V2LT1G	onsemi	8.2	±5%	225	15	900 @ 10 mA	-65 to 150	SOT-23-3	Active
BZX84C8V2-7-F	Diodes Incorporated	8.2	±6%	300	15	900 @ 10 mA	-65 to 150	SOT-23-3	Active
BZX84-A8V2,215	Nexperia USA Inc.	8.2	±1%	250	15	900 @ 10 mA	-65 to 150	SOT-23-3	Active
BZX84-C8V2,215	Nexperia USA Inc.	8.2	±5%	250	15	900 @ 10 mA	-65 to 150	SOT-23-3	Active
BZX84-C8V2,235	Nexperia USA Inc.	8.2	±5%	250	15	900 @ 10 mA	-65 to 150	SOT-23-3	Active
BZX84C8V2 TR	Central Semiconductor Corp	8.2	±5%	350	15	900 @ 10 mA	-65 to 150	SOT-23-3	Active
BZX84C8V2_R1_00001	Panjit International Inc.	8.2	±5%	410	15	-	-55 to 150	SOT-23-3	Active
CMPZ5237B TR PBFREE	Central Semiconductor Corp	8.2	±5%	350	8	900 @ 10 mA	-65 to 150	SOT-23-3	Active

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility):

BZX84C8V2-7-F (Diodes Incorporated) and BZX84C8V2 TR (Central Semiconductor Corp) are direct replacements with identical Zener voltage, package configuration, and impedance specifications. Both parts are active products with extended operating temperature ranges (-65°C to 150°C) compared to the original BZX84C8V2. BZX84C8V2-7-F offers 300 mW power rating with ±6% tolerance matching the original specification. BZX84C8V2 TR provides 350 mW power rating with ±5% tolerance.

onsemi Series Alternatives:

BZX84C8V2LT1G (onsemi) is an active equivalent from the same manufacturer with identical Zener voltage and impedance. This part features 250 mW power rating and ±5% tolerance with extended temperature range (-65°C to 150°C). BZX84B8V2LT1G offers tighter ±2% tolerance with 225 mW power rating. SZBZX84C8V2LT1G is an automotive-grade variant (AEC-Q101 qualified) with 225 mW power rating and ±5% tolerance.

Nexperia Alternatives:

BZX84-A8V2,215, BZX84-C8V2,215, and BZX84-C8V2,235 (Nexperia USA Inc.) are automotive-grade parts (AEC-Q101 qualified) with 250 mW power rating. BZX84-A8V2,215 features superior ±1% tolerance. All Nexperia variants maintain identical Zener voltage, impedance, and operating temperature range.

Enhanced Performance Option:

CMPZ5237B TR PBFREE (Central Semiconductor Corp) provides improved impedance performance (8 Ohms versus 15 Ohms) with 350 mW power rating and ±5% tolerance. This part offers superior voltage regulation characteristics while maintaining package and mounting compatibility.

Higher Power Rating Option:

BZX84C8V2_R1_00001 (Panjit International Inc.) provides 410 mW power rating with ±5% tolerance and maintains the original operating temperature range (-55°C to 150°C).

All substitute parts are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard assembly and storage processes.

Frequently Asked Questions (FAQ)

Q: Can BZX84C8V2LT1G replace BZX84C8V2 in existing designs?

A: Yes. BZX84C8V2LT1G is an active equivalent with identical Zener voltage (8.2 V), impedance (15 Ohms), and SOT-23-3 package. The 250 mW power rating is lower than the original 350 mW specification, but this is acceptable for applications not requiring maximum power dissipation. The extended operating temperature range (-65°C to 150°C) provides improved thermal performance.

Q: What is the difference between onsemi and Nexperia variants?

A: onsemi variants (BZX84C8V2LT1G, BZX84B8V2LT1G, SZBZX84C8V2LT1G) are standard industrial-grade parts, with SZBZX84C8V2LT1G offering automotive qualification (AEC-Q101). Nexperia variants (BZX84-A8V2,215, BZX84-C8V2,215, BZX84-C8V2,235) are all automotive-qualified with AEC-Q101 certification. Nexperia parts feature tighter tolerance options (±1% for BZX84-A8V2,215) compared to onsemi industrial variants.

Q: Is CMPZ5237B TR PBFREE compatible with BZX84C8V2?

A: Yes, with enhanced performance. CMPZ5237B TR PBFREE maintains identical Zener voltage (8.2 V) and SOT-23-3 package. The impedance is improved (8 Ohms versus 15 Ohms), resulting in better voltage regulation. Power rating (350 mW) and tolerance (±5%) are equivalent to the original specification.

Q: Can I use a lower power rating substitute?

A: Yes, provided the application does not require the full 350 mW power dissipation. BZX84C8V2LT1G (250 mW) and SZBZX84C8V2LT1G (225 mW) are acceptable for applications with reduced thermal requirements. Verify that the maximum expected power dissipation in the circuit does not exceed the substitute part's rating.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 qualification indicates the part meets automotive industry reliability and quality standards. SZBZX84C8V2LT1G and all Nexperia variants (BZX84-A8V2,215, BZX84-C8V2,215, BZX84-C8V2,235) are AEC-Q101 qualified, making them suitable for automotive applications requiring enhanced reliability documentation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard surface mount assembly processes and storage conditions.

Q: What tolerance should I select for voltage-critical applications?

A: For applications requiring tight voltage regulation, BZX84-A8V2,215 (Nexperia) offers ±1% tolerance, providing superior voltage accuracy. BZX84B8V2LT1G (onsemi) offers ±2% tolerance as an alternative. Standard tolerance options (±5% to ±6%) are acceptable for general-purpose voltage regulation applications.

Q: Can I substitute BZX84C8V2-7-F (Diodes Incorporated) for the original onsemi part?

A: Yes. BZX84C8V2-7-F is a direct replacement with identical part number designation from a different manufacturer. It maintains 8.2 V Zener voltage, ±6% tolerance, SOT-23-3 package, and 15 Ohms impedance. The 300 mW power rating is slightly lower than the original 350 mW, but the extended operating temperature range (-65°C to 150°C) provides improved thermal performance.

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