BZX84C3V0-7 Equivalent & Substitute Parts

Part Overview

The BZX84C3V0-7 is a Zener diode rated at 3 V nominal voltage with 300 mW maximum power dissipation in a surface mount SOT-23-3 package. Manufactured by Diodes Incorporated, this component is classified as discontinued at DiGi Electronics, necessitating identification of active equivalent and substitute parts for ongoing design requirements and production continuity.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	3 V
Tolerance	±7%
Power - Max	300 mW
Impedance (Max)	95 Ohms
Current - Reverse Leakage @ Vr	10 µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA
Operating Temperature	-65°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the BZX84C3V0-7 is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 3 V nominal
Package type: SOT-23-3 (TO-236-3, SC-59)
Mounting: Surface Mount
Operating temperature range: -65°C to 150°C minimum

Secondary Compatibility Factors:

Power dissipation: 300 mW or greater
Impedance: 95 Ohms maximum
Reverse leakage current: 10 µA @ 1 V maximum
Forward voltage: 900 mV @ 10 mA maximum
Tolerance: ±7% or tighter

Substitute parts are grouped into two categories: Parametric Equivalents (matching all electrical specifications) and Manufacturer Recommended Alternatives (meeting functional requirements with minor parameter variations). Parts with reduced power ratings (225 mW or 250 mW) are acceptable substitutes when circuit design permits lower dissipation limits.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Vf (Max) @ If	Temp Range	Product Status	RoHS
BZX84C3V0-7	Diodes Inc.	3 V	±7%	300 mW	95 Ω	900 mV @ 10 mA	-65 to 150°C	Discontinued	Non-compliant
BZX84B3V0-7-F	Diodes Inc.	3 V	±2%	300 mW	95 Ω	900 mV @ 10 mA	-65 to 150°C	Active	ROHS3 Compliant
BZX84C3V0-7-F	Diodes Inc.	3 V	±7%	300 mW	95 Ω	900 mV @ 10 mA	-65 to 150°C	Active	ROHS3 Compliant
BZX84-A3V0,215	NXP USA Inc.	3 V	±1%	250 mW	95 Ω	900 mV @ 10 mA	-65 to 150°C	Active	Not specified
BZX84-C3V0,215	NXP Semiconductors	3 V	±5%	250 mW	95 Ω	900 mV @ 10 mA	-65 to 150°C	Active	Not specified
BZX84-C3V0,235	Nexperia USA Inc.	3 V	±5%	250 mW	95 Ω	900 mV @ 10 mA	-65 to 150°C	Active	ROHS3 Compliant
BZX84C3V0-TP	Micro Commercial Co	3 V	±5%	350 mW	95 Ω	900 mV @ 10 mA	-55 to 150°C	Active	ROHS3 Compliant
BZX84C3V0LT1G	onsemi	3 V	±7%	225 mW	95 Ω	900 mV @ 10 mA	-65 to 150°C	Active	ROHS3 Compliant
MMBZ5225BLT1G	onsemi	3 V	±5%	225 mW	29 Ω	900 mV @ 10 mA	-65 to 150°C	Active	ROHS3 Compliant
SZBZX84C3V0LT1G	onsemi	3 V	±5%	225 mW	95 Ω	900 mV @ 10 mA	-65 to 150°C	Active	ROHS3 Compliant
SZMMBZ5225BLT1G	onsemi	3 V	±5%	225 mW	29 Ω	900 mV @ 10 mA	-65 to 150°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Parametric Equivalents (Recommended Primary Substitutes):

BZX84C3V0-7-F from Diodes Incorporated is the direct equivalent, maintaining identical electrical specifications (3 V, ±7%, 300 mW) while offering active product status and ROHS3 compliance. This part is available in Cut Tape and Digi-Reel packaging with 18,100 units in stock.

BZX84B3V0-7-F from Diodes Incorporated provides improved tolerance (±2% versus ±7%) with identical power rating and package, also ROHS3 compliant and actively produced.

Manufacturer Recommended Alternatives:

NXP Semiconductors BZX84-C3V0,215 and BZX84-C3V0,235 are automotive-grade alternatives (AEC-Q101 qualified) with reduced power dissipation (250 mW) and improved tolerance (±5%). These are suitable for applications where the lower power rating is acceptable. BZX84-C3V0,235 is ROHS3 compliant with 11,083 units available.

NXP USA BZX84-A3V0,215 offers the tightest tolerance (±1%) with automotive qualification, though power is limited to 250 mW.

Lower Power Alternatives:

onsemi BZX84C3V0LT1G, SZBZX84C3V0LT1G, MMBZ5225BLT1G, and SZMMBZ5225BLT1G are suitable for applications tolerating 225 mW maximum dissipation. All are ROHS3 compliant and actively produced. SZMMBZ5225BLT1G includes automotive qualification (AEC-Q101).

Higher Power Alternative:

Micro Commercial Co BZX84C3V0-TP provides 350 mW dissipation capacity with ±5% tolerance, offering design margin for higher power applications. Operating temperature minimum is -55°C (versus -65°C for other options).

Frequently Asked Questions (FAQ)

Q: Can BZX84C3V0-7-F directly replace BZX84C3V0-7?

A: Yes. BZX84C3V0-7-F is a direct parametric equivalent with identical electrical specifications (3 V, ±7%, 300 mW, 95 Ω impedance) and package (SOT-23-3). The primary difference is active product status and ROHS3 compliance versus the discontinued, non-compliant original.

Q: What is the difference between BZX84B3V0-7-F and BZX84C3V0-7-F?

A: Both are Diodes Incorporated parts in SOT-23-3 packages with 300 mW power rating. The BZX84B variant offers ±2% tolerance compared to ±7% for the BZX84C variant. Selection depends on tolerance requirements for the application.

Q: Can I use a 250 mW part instead of 300 mW?

A: Substitution with 250 mW parts (NXP BZX84-A3V0,215 or BZX84-C3V0,215/235) is acceptable only if circuit analysis confirms maximum power dissipation does not exceed 250 mW under all operating conditions, including worst-case scenarios.

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

A: Substitution with 225 mW parts (onsemi BZX84C3V0LT1G, SZBZX84C3V0LT1G, MMBZ5225BLT1G, SZMMBZ5225BLT1G) requires verification that circuit power dissipation remains below 225 mW. These parts are suitable for lower-power applications or designs with reduced thermal stress.

Q: What is the significance of the impedance difference in MMBZ5225BLT1G and SZMMBZ5225BLT1G?

A: These parts specify 29 Ohms impedance versus 95 Ohms for other alternatives. Lower impedance affects dynamic response characteristics. Verify impedance compatibility with circuit requirements before substitution.

Q: Are automotive-qualified parts required?

A: Automotive-qualified parts (AEC-Q101) such as BZX84-A3V0,215, BZX84-C3V0,215, BZX84-C3V0,235, SZBZX84C3V0LT1G, and SZMMBZ5225BLT1G are required only for automotive applications. Standard industrial applications do not require this qualification.

Q: What packaging options are available?

A: Substitute parts are available in Tape & Reel (TR), Cut Tape (CT) with Digi-Reel, and Bulk packaging. Selection depends on production volume and assembly requirements. All maintain the same SOT-23-3 component package.

Q: Is RoHS compliance mandatory for my application?

A: RoHS3 compliance is mandatory for products sold in the European Union and many other markets. All active substitute parts listed are ROHS3 compliant, whereas the original BZX84C3V0-7 is non-compliant. Verify regulatory requirements for your target markets.

Q: What is the minimum operating temperature difference between alternatives?

A: Most alternatives operate from -65°C to 150°C. BZX84C3V0-TP from Micro Commercial Co has a minimum of -55°C. Verify this meets application requirements before selection.

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