BZX84B5V1-TP Equivalent & Substitute Parts

Part Overview

The BZX84B5V1-TP is a 5.1 V Zener diode manufactured by Micro Commercial Co, rated at 350 mW maximum power dissipation in a surface mount SOT-23 package. This component is classified as Active and maintains full RoHS3 compliance with unlimited moisture sensitivity level (MSL 1). The BZX84B5V1-TP serves as a voltage regulation and protection element in electronic circuits requiring stable 5.1 V reference voltage generation or transient suppression.

Equivalent and substitute parts are identified based on matching or exceeding the electrical performance specifications while maintaining compatible mechanical packaging and thermal operating ranges. Substitution becomes necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit operation within the parameter tolerances of alternative manufacturers' offerings.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	5.1	V
Tolerance	±2%	—
Power - Maximum	350	mW
Impedance (Maximum)	60	Ohms
Current - Reverse Leakage @ Vr	2	µA @ 2 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	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the BZX84B5V1-TP is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage (Nominal): 5.1 V
Tolerance: ±2% or tighter
Impedance (Maximum): 60 Ohms
Current - Reverse Leakage @ Vr: 2 µA @ 2 V
Voltage - Forward (Maximum) @ If: 900 mV @ 10 mA
Package / Case: TO-236-3, SC-59, SOT-23-3 (mechanical compatibility)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Secondary Consideration:

Power - Maximum: 350 mW or greater (substitutes with lower power ratings operate within circuit constraints if thermal design permits)
Operating Temperature Range: -55°C to 150°C or extended range (-65°C to 150°C acceptable)

Substitute parts are classified into two categories:

Upgrade Substitutes: Parts that meet or exceed all primary matching criteria with identical or superior electrical performance and expanded operating temperature ranges or automotive-grade qualifications.

Similar Substitutes: Parts that maintain the 5.1 V nominal zener voltage and core electrical characteristics but may exhibit variations in power rating, tolerance, or operating temperature range. These parts remain functionally compatible within the specified parameter envelope.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Temp Range	Grade	Qualification	RoHS Status
BZX84B5V1-TP	Micro Commercial Co	5.1 V	±2%	350 mW	60 Ω	-55 to 150°C	—	—	ROHS3
BZX84B5V1-7-F	Diodes Incorporated	5.1 V	±2%	300 mW	60 Ω	-65 to 150°C	Automotive	AEC-Q101	ROHS3
BZX84B5V1Q-7-F	Diodes Incorporated	5.1 V	±2%	300 mW	60 Ω	-65 to 150°C	Automotive	AEC-Q101	ROHS3
BZX84-A5V1,215	Nexperia USA Inc.	5.1 V	±1%	250 mW	60 Ω	-65 to 150°C	Automotive	AEC-Q101	ROHS3
BZX84-A5V1,235	Nexperia USA Inc.	5.1 V	±1%	250 mW	60 Ω	-65 to 150°C	Automotive	AEC-Q101	ROHS3
BZX84-B5V1,215	Nexperia USA Inc.	5.1 V	±2%	250 mW	60 Ω	-65 to 150°C	Automotive	AEC-Q101	ROHS3
BZX84-B5V1,235	NXP USA Inc.	5.1 V	±2%	250 mW	60 Ω	-65 to 150°C	Automotive	AEC-Q101	ROHS3
BZX84B5V1-E3-08	Vishay General Semiconductor - Diodes Division	5.1 V	±2%	300 mW	60 Ω	-55 to 150°C	—	—	ROHS3
BZX84B5V1LT1G	onsemi	5.1 V	±2%	225 mW	60 Ω	-65 to 150°C	—	—	ROHS3
BZX84C5V1 TR PBFREE	Central Semiconductor Corp	5.1 V	±5%	350 mW	60 Ω	-65 to 150°C	—	—	ROHS3
BZX84C5V1-E3-08	Vishay General Semiconductor - Diodes Division	5.1 V	±5.88%	300 mW	60 Ω	-55 to 150°C	—	—	ROHS3

Engineering Selection Recommendations

Upgrade Substitutes (Direct Replacement with Enhanced Specifications):

BZX84B5V1-7-F and BZX84B5V1Q-7-F (Diodes Incorporated) are qualified upgrade substitutes. Both parts maintain the 5.1 V nominal zener voltage and ±2% tolerance matching the BZX84B5V1-TP. Although power dissipation is reduced to 300 mW, the extended operating temperature range (-65°C to 150°C) and automotive-grade AEC-Q101 qualification provide enhanced reliability for temperature-critical applications. These parts are suitable for direct replacement in designs where the 350 mW rating is not fully utilized.

Compatible Substitutes (Matching Core Specifications):

BZX84-A5V1,215 and BZX84-A5V1,235 (Nexperia USA Inc.) offer tighter tolerance (±1%) at the cost of reduced power rating (250 mW). These automotive-qualified parts are compatible with the BZX84B5V1-TP in applications where voltage regulation precision is prioritized and thermal dissipation remains within 250 mW limits.

BZX84-B5V1,215 and BZX84-B5V1,235 (Nexperia USA Inc. and NXP USA Inc.) maintain ±2% tolerance and 250 mW power rating with automotive qualification. These parts are suitable for applications where the extended temperature range and automotive-grade certification are required.

BZX84B5V1-E3-08 (Vishay General Semiconductor - Diodes Division) provides 300 mW power dissipation with matching ±2% tolerance and identical operating temperature range to the BZX84B5V1-TP. This part is a direct functional equivalent for non-automotive applications.

Conditional Substitutes (Reduced Power or Tolerance Variance):

BZX84B5V1LT1G (onsemi) operates at 225 mW maximum power, requiring thermal design verification for applications approaching the original 350 mW specification. The extended temperature range (-65°C to 150°C) supports temperature-critical designs.

BZX84C5V1 TR PBFREE (Central Semiconductor Corp) maintains 350 mW power rating but exhibits ±5% tolerance, which exceeds the ±2% specification of the BZX84B5V1-TP. This part is suitable only for applications with relaxed voltage regulation requirements.

BZX84C5V1-E3-08 (Vishay General Semiconductor - Diodes Division) exhibits ±5.88% tolerance, further limiting its use to applications tolerating wider voltage variation.

All substitute parts maintain ROHS3 compliance, MSL 1 (unlimited moisture sensitivity), and identical mechanical packaging (TO-236-3, SC-59, SOT-23-3).

Frequently Asked Questions (FAQ)

Q: Can BZX84B5V1-7-F replace BZX84B5V1-TP directly on the PCB?

A: Yes. Both parts use identical SOT-23 surface mount packaging (TO-236-3, SC-59, SOT-23-3) and share the same pinout. The BZX84B5V1-7-F is mechanically and electrically compatible. The 300 mW power rating is acceptable if circuit thermal analysis confirms power dissipation remains below 300 mW under worst-case operating conditions.

Q: What is the difference between BZX84B5V1-7-F and BZX84B5V1Q-7-F?

A: Both parts are manufactured by Diodes Incorporated with identical electrical specifications (5.1 V, ±2%, 300 mW, -65 to 150°C). The "Q" designation in BZX84B5V1Q-7-F indicates tight tolerance screening. Both are AEC-Q101 automotive qualified. Selection depends on supply availability and application requirements.

Q: Why do some substitutes have lower power ratings (250 mW or 225 mW)?

A: Lower power ratings reflect different die designs and thermal characteristics from alternative manufacturers. Substitution is valid only if circuit analysis confirms that actual power dissipation in the application remains below the substitute part's maximum rating. Thermal design review is required when transitioning from 350 mW to lower-rated parts.

Q: Are automotive-qualified parts (AEC-Q101) necessary for non-automotive applications?

A: No. Automotive qualification provides additional reliability screening and extended temperature range validation. For non-automotive applications, standard industrial-grade parts such as BZX84B5V1-E3-08 (Vishay) are functionally equivalent and cost-effective alternatives.

Q: What does ±1% tolerance mean compared to ±2%?

A: Tolerance specifies the allowable deviation from the nominal 5.1 V zener voltage. ±1% tolerance (BZX84-A5V1 series) restricts zener voltage to 5.049 V to 5.151 V, while ±2% tolerance (BZX84B5V1-TP) allows 4.998 V to 5.202 V. Tighter tolerance improves voltage regulation precision but does not affect circuit compatibility if the application accepts the wider ±2% range.

Q: Can BZX84C5V1 TR PBFREE be used as a substitute despite ±5% tolerance?

A: BZX84C5V1 TR PBFREE is not recommended as a direct substitute due to ±5% tolerance, which permits zener voltage variation from 4.845 V to 5.355 V. This exceeds the ±2% specification of the BZX84B5V1-TP. Use only in applications with relaxed voltage regulation requirements or where circuit design accommodates the wider voltage range.

Q: What is the significance of the operating temperature range difference (-55°C vs. -65°C)?

A: The BZX84B5V1-TP operates from -55°C to 150°C, while many substitutes extend the lower limit to -65°C. The extended range provides additional margin for cold-temperature applications. For designs operating above -55°C, both ranges are equivalent. For applications requiring operation below -55°C, substitutes with -65°C minimum are required.

Q: Are all listed parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance, ensuring compatibility with RoHS3-regulated supply chains and end-use markets.

Q: What packaging format should I specify when ordering substitutes?

A: Specify "Tape & Reel (TR)" for automated assembly or "Bulk" for manual assembly. All listed parts are available in SOT-23 surface mount packaging. Verify supplier device package designation matches your assembly equipment specifications.

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