BZX84C2V7-7 Equivalent & Substitute Parts

Part Overview

The BZX84C2V7-7 is a 2.7 V Zener diode rated for 300 mW maximum power dissipation in a surface mount SOT-23-3 package, manufactured by Diodes Incorporated. This part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain functional compatibility within target applications.

Zener diodes in this voltage and power class are used for voltage regulation, overvoltage protection, and reference voltage generation in electronic circuits. Substitution requires matching the nominal Zener voltage, power rating, package type, and electrical characteristics within acceptable tolerance ranges.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	2.7	V
Tolerance	±7%	%
Power - Max	300	mW
Impedance (Max)	100	Ohms
Current - Reverse Leakage @ Vr	20	µA @ 1 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 BZX84C2V7-7 is determined by the following critical parameters:

Primary Matching Criteria:

Nominal Zener voltage: 2.7 V (exact match required)
Package type: SOT-23-3 / TO-236-3 / SC-59 (physical and electrical compatibility)
Mounting type: Surface Mount (required for PCB integration)
Operating temperature range: -65°C to 150°C minimum (functional envelope)

Secondary Compatibility Criteria:

Power rating: 300 mW or greater (equal or higher rating acceptable)
Impedance (Max): 100 Ohms or lower (lower impedance acceptable)
Reverse leakage current: 20 µA @ 1 V or lower (lower leakage acceptable)
Forward voltage: 900 mV @ 10 mA or lower (lower forward voltage acceptable)
Tolerance: ±7% or tighter (tighter tolerance acceptable)

Substitute parts are grouped into two categories:

Category 1: Direct Parametric Equivalents – Parts matching all primary criteria with identical or superior secondary parameters. These parts are interchangeable without circuit redesign.

Category 2: Functional Equivalents with Derating – Parts with reduced power ratings (250 mW) that function within the same voltage class. These require verification that circuit power dissipation does not exceed the substitute part's rating.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (V)	Tolerance (%)	Power Max (mW)	Zzt Max (Ω)	Leakage @ 1V (µA)	Vf Max @ 10mA (mV)	Temp Range (°C)	Package	Product Status	RoHS
BZX84C2V7-7	Diodes Incorporated	2.7	±7%	300	100	20	900	-65 to 150	SOT-23-3	Discontinued	Non-compliant
BZX84B2V7-7-F	Diodes Incorporated	2.7	±2%	300	100	20	900	-65 to 150	SOT-23-3	Active	ROHS3 Compliant
BZX84C2V7-7-F	Diodes Incorporated	2.7	±7%	300	100	20	900	-65 to 150	SOT-23-3	Active	ROHS3 Compliant
BZX84-A2V7,215	Nexperia USA Inc.	2.7	±1%	250	100	20	900	-65 to 150	TO-236AB	Active	ROHS3 Compliant
BZX84-C2V7,215	NXP Semiconductors	2.7	±5%	250	100	20	900	-65 to 150	TO-236AB	Active	Not specified
BZX84-C2V7,235	Nexperia USA Inc.	2.7	±5%	250	100	20	900	-65 to 150	TO-236AB	Active	ROHS3 Compliant
BZX84C2V7-TP	Micro Commercial Co	2.7	±5%	350	100	20	900	-55 to 150	SOT-23	Active	ROHS3 Compliant
BZX84C2V7LT1G	onsemi	2.7	±7%	225	100	20	900	-65 to 150	SOT-23-3	Active	ROHS3 Compliant
MMBZ5223BLT1G	onsemi	2.7	±5%	225	30	75	900	-65 to 150	SOT-23-3	Active	ROHS3 Compliant
SZBZX84C2V7LT1G	onsemi	2.7	±7%	225	100	20	900	-65 to 150	SOT-23-3	Active	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1: Direct Replacement (No Circuit Modification Required)

BZX84C2V7-7-F (Diodes Incorporated) is the primary direct replacement. This part maintains identical electrical specifications to the original BZX84C2V7-7, including 300 mW power rating, ±7% tolerance, and SOT-23-3 package. The part is currently active with ROHS3 compliance and 12,200 units in stock. Footprint and pinout compatibility is guaranteed.

BZX84B2V7-7-F (Diodes Incorporated) provides an alternative with improved tolerance (±2% versus ±7%), maintaining all other specifications. This part is suitable for applications requiring tighter voltage regulation. 33,080 units are in stock.

Tier 2: Functional Equivalents with Power Derating

BZX84C2V7-TP (Micro Commercial Co) offers increased power rating (350 mW) in SOT-23 package, providing design margin for thermal management. Operating temperature minimum is -55°C (versus -65°C). This part is suitable for applications where power dissipation approaches the original 300 mW rating.

BZX84C2V7LT1G (onsemi) and SZBZX84C2V7LT1G (onsemi) both feature 225 mW power rating with ±7% tolerance. SZBZX84C2V7LT1G includes AEC-Q101 automotive qualification. These parts require verification that circuit power dissipation does not exceed 225 mW. Both are available in high quantities (59,100 and 21,363 units respectively).

Tier 3: Automotive-Grade Alternatives

BZX84-A2V7,215 (Nexperia USA Inc.) and BZX84-C2V7,235 (Nexperia USA Inc.) are AEC-Q101 qualified automotive-grade parts with 250 mW power rating. These are suitable for automotive and industrial applications requiring qualification documentation. Both use TO-236AB package (mechanically compatible with SOT-23-3).

Tier 4: Alternative Topology

MMBZ5223BLT1G (onsemi) provides 2.7 V regulation with 225 mW rating but features significantly lower impedance (30 Ohms versus 100 Ohms) and higher reverse leakage (75 µA versus 20 µA). This part is suitable only for applications where lower impedance is beneficial and higher leakage is acceptable.

Frequently Asked Questions (FAQ)

Q: Can BZX84C2V7-7-F be used as a direct drop-in replacement for BZX84C2V7-7?

A: Yes. BZX84C2V7-7-F is electrically and mechanically identical to the original part, with identical 300 mW power rating, ±7% tolerance, and SOT-23-3 package. No circuit modifications are required.

Q: What is the difference between BZX84B2V7-7-F and BZX84C2V7-7-F?

A: The primary difference is tolerance specification. BZX84B2V7-7-F has ±2% tolerance (tighter), while BZX84C2V7-7-F has ±7% tolerance (matching the original). Both maintain 300 mW power rating and identical package. BZX84B2V7-7-F is suitable for applications requiring improved voltage accuracy.

Q: Can I use BZX84C2V7LT1G or SZBZX84C2V7LT1G as replacements?

A: These parts are functionally compatible but have reduced power rating (225 mW versus 300 mW). Substitution is valid only if circuit power dissipation does not exceed 225 mW. Both parts maintain 2.7 V nominal voltage and SOT-23-3 package compatibility.

Q: What is the advantage of SZBZX84C2V7LT1G over BZX84C2V7LT1G?

A: SZBZX84C2V7LT1G includes AEC-Q101 automotive qualification, making it suitable for automotive and industrial applications requiring qualification documentation. Electrical specifications are otherwise identical.

Q: Are the Nexperia parts (BZX84-A2V7,215 and BZX84-C2V7,235) compatible with the original SOT-23-3 footprint?

A: Yes. Both Nexperia parts use TO-236AB package, which is mechanically and electrically compatible with SOT-23-3. However, both have reduced power rating (250 mW versus 300 mW) and require verification that circuit power dissipation is within limits.

Q: Why does MMBZ5223BLT1G have different impedance and leakage specifications?

A: MMBZ5223BLT1G uses a different internal design topology, resulting in lower impedance (30 Ohms versus 100 Ohms) and higher reverse leakage (75 µA versus 20 µA). This part is suitable only for applications where lower impedance is beneficial and higher leakage current is acceptable.

Q: What is the minimum operating temperature for BZX84C2V7-TP?

A: BZX84C2V7-TP operates from -55°C to 150°C, compared to -65°C to 150°C for the original part. This part is suitable for applications where -55°C minimum temperature is acceptable.

Q: Which substitute part has the best availability?

A: BZX84-C2V7,215 (NXP Semiconductors) has the highest inventory at 63,300 units. BZX84C2V7LT1G (onsemi) has 59,100 units available.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are ROHS3 compliant except BZX84-C2V7,215 (NXP Semiconductors), for which RoHS status is not specified in available documentation.

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