BZX84C7V5-7 Equivalent & Substitute Parts

Part Overview

The BZX84C7V5-7 is a Zener diode manufactured by Diodes Incorporated, rated at 7.5 V nominal voltage with 300 mW maximum power dissipation in a surface mount SOT-23-3 package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility for circuit applications requiring 7.5 V Zener regulation.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	7.5	V
Tolerance	±6%	%
Power - Max	300	mW
Impedance (Max)	15	Ohms
Current - Reverse Leakage @ Vr	1	µA @ 5 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—

Substitute Part Grouping Explanation

Substitution of the BZX84C7V5-7 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Zener voltage (Nom): 7.5 V (primary functional parameter)
Tolerance: ±6% or tighter (maintains voltage regulation accuracy)
Power - Max: 300 mW or greater (ensures thermal capability)
Impedance (Max): 15 Ohms or lower (maintains dynamic response)
Current - Reverse Leakage @ Vr: 1 µA @ 5 V or lower (ensures leakage performance)
Voltage - Forward (Vf) (Max) @ If: 900 mV @ 10 mA or lower (maintains forward conduction characteristics)
Operating Temperature: -65°C to 150°C or wider range (ensures thermal envelope coverage)

Mechanical Compatibility Requirements:

Mounting Type: Surface Mount (required for PCB assembly compatibility)
Package / Case: TO-236-3, SC-59, SOT-23-3 (physical and electrical pin compatibility)

Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical specifications with different product status or packaging) and Manufacturer Recommended Alternatives (functionally compatible with minor parameter variations acceptable for the application).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (V)	Tolerance (%)	Power Max (mW)	Zzt (Ohms)	Vf Max @ If (mV @ mA)	Temp Range (°C)	Package	Product Status	RoHS Status
BZX84C7V5-7	Diodes Incorporated	7.5	±6	300	15	900 @ 10	-65 to 150	SOT-23-3	Discontinued	Non-compliant
BZX84B7V5-7-F	Diodes Incorporated	7.5	±2	300	15	900 @ 10	-65 to 150	SOT-23-3	Active	ROHS3 Compliant
BZX84C7V5-7-F	Diodes Incorporated	7.5	±6	300	15	900 @ 10	-65 to 150	SOT-23-3	Active	ROHS3 Compliant
BZX84-A7V5,215	Nexperia USA Inc.	7.5	±1	250	15	900 @ 10	-65 to 150	TO-236AB	Active	ROHS3 Compliant
BZX84-C7V5,215	NXP Semiconductors	7.5	±5	250	15	900 @ 10	-65 to 150	TO-236AB	Active	ROHS3 Compliant
BZX84-C7V5,235	NXP USA Inc.	7.5	±5	250	15	900 @ 10	-65 to 150	SOT-23	Active	ROHS3 Compliant
BZX84B7V5-HE3-08	Vishay General Semiconductor	7.5	±2	300	15	—	-55 to 150	SOT-23-3	Obsolete	ROHS3 Compliant
BZX84B7V5LT1G	onsemi	7.5	±2	225	15	900 @ 10	-65 to 150	SOT-23-3	Active	ROHS3 Compliant
BZX84C7V5-G3-08	Vishay General Semiconductor	7.5	±5	300	15	—	-55 to 150	SOT-23-3	Active	ROHS3 Compliant
BZX84C7V5LT1G	onsemi	7.5	±5	225	15	900 @ 10	-65 to 150	SOT-23-3	Active	ROHS3 Compliant
MMBZ5236BLT1G	onsemi	7.5	±5	225	6	900 @ 10	-65 to 150	SOT-23-3	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Parametric Equivalents):

BZX84C7V5-7-F (Diodes Incorporated) is the direct parametric equivalent, offering identical electrical specifications with active product status and ROHS3 compliance. This part maintains the original ±6% tolerance, 300 mW power rating, and full -65°C to 150°C operating range. The primary difference is packaging format (Tape & Reel vs. bulk), which does not affect electrical performance.

BZX84B7V5-7-F (Diodes Incorporated) provides improved tolerance (±2% vs. ±6%) while maintaining 300 mW power dissipation and identical thermal range. This part is suitable for applications requiring tighter voltage regulation accuracy.

Secondary Substitutes (Functionally Compatible):

BZX84C7V5-G3-08 (Vishay General Semiconductor) maintains 300 mW power rating and ±5% tolerance with active product status. The operating temperature range is reduced to -55°C to 150°C, which is acceptable for non-extended-temperature applications.

BZX84C7V5LT1G and BZX84B7V5LT1G (onsemi) provide active product status with ROHS3 compliance. These parts operate at reduced power dissipation (225 mW vs. 300 mW), suitable for applications where thermal margin is not critical.

MMBZ5236BLT1G (onsemi) offers improved impedance performance (6 Ohms vs. 15 Ohms) at 225 mW power rating, providing superior dynamic response characteristics for voltage regulation applications.

Automotive-Grade Alternatives:

BZX84-A7V5,215 (Nexperia USA Inc.) and BZX84-C7V5,215 (NXP Semiconductors) are AEC-Q101 qualified automotive-grade components with active product status. These parts operate at 250 mW power dissipation and are suitable for automotive and high-reliability applications.

Parts to Avoid:

BZX84B7V5-HE3-08 (Vishay General Semiconductor) is listed as Obsolete and should not be selected for new designs despite active inventory availability.

Frequently Asked Questions (FAQ)

Q: Can BZX84C7V5-7-F directly replace BZX84C7V5-7?

A: Yes. BZX84C7V5-7-F is a parametric equivalent with identical electrical specifications (7.5 V, ±6%, 300 mW, SOT-23-3). The primary difference is packaging format (Tape & Reel). Both parts are electrically and mechanically interchangeable.

Q: What is the difference between ±6% and ±2% tolerance variants?

A: Tolerance specifies the allowable deviation from the nominal 7.5 V Zener voltage. ±6% tolerance allows deviation from 7.05 V to 7.95 V, while ±2% tolerance restricts deviation to 7.35 V to 7.65 V. Applications requiring tighter voltage regulation should use ±2% variants such as BZX84B7V5-7-F.

Q: Can I use a 225 mW part instead of 300 mW?

A: Substitution with lower power-rated parts (225 mW) is acceptable only if circuit design ensures maximum power dissipation does not exceed the substitute part's rating. Verify thermal conditions and circuit current levels before selection.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed are ROHS3 compliant. The original BZX84C7V5-7 is RoHS non-compliant. If RoHS compliance is required, select from active substitute parts only.

Q: What is the significance of impedance (Zzt) values?

A: Impedance affects dynamic voltage regulation response. Lower impedance (6 Ohms in MMBZ5236BLT1G vs. 15 Ohms in standard variants) provides faster response to load transients. Standard 15 Ohm impedance is suitable for most applications; lower impedance is beneficial for high-speed switching circuits.

Q: Can automotive-grade parts be used in non-automotive applications?

A: Yes. Automotive-grade parts (AEC-Q101 qualified) meet or exceed commercial-grade specifications and are suitable for any application. These parts provide additional qualification and reliability assurance.

Q: What is the difference between TO-236AB and SOT-23-3 packages?

A: TO-236AB and SOT-23-3 are equivalent package designations for the same physical form factor. Both refer to a three-terminal surface mount package with identical pin configuration and footprint compatibility.

Q: Should I select Diodes Incorporated, Nexperia, or onsemi variants?

A: Selection should be based on product status (Active preferred), compliance requirements (ROHS3 for regulated applications), and electrical specifications matching circuit requirements. All three manufacturers provide equivalent functionality for this voltage rating.

Q: Is BZX84B7V5-HE3-08 available for new designs?

A: No. Although inventory is available, this part is marked Obsolete and should not be selected for new designs. Select from Active status parts to ensure long-term supply availability.

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