1N5223C-TAP Equivalent & Substitute Parts

Part Overview

The 1N5223C-TAP is a 2.7 V zener diode rated at 500 mW with ±2% tolerance, manufactured by Vishay General Semiconductor - Diodes Division. This through-hole component is packaged in DO-204AH (DO-35) axial configuration and is qualified to AEC-Q101 automotive standards. The part is currently active with 1125 units in stock. Equivalent and substitute parts are identified for applications requiring alternative sourcing, inventory management, or specific manufacturing preferences while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	1N5223C-TAP
Voltage - Zener (Nom)	2.7 V
Tolerance	±2%
Power - Max	500 mW
Impedance (Max)	30 Ohms
Current - Reverse Leakage @ Vr	75 µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA
Operating Temperature	175°C
Mounting Type	Through Hole
Package / Case	DO-204AH, DO-35, Axial
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 1N5223C-TAP is determined by the following critical parameters:

Primary Substitution Criteria:

Zener voltage: 2.7 V (nominal)
Power rating: 500 mW or higher
Tolerance: ±2% to ±5% acceptable
Package: DO-204AH (DO-35) axial through-hole
Mounting type: Through hole

Secondary Compatibility Factors:

Impedance (Zzt): Maximum 100 Ohms
Reverse leakage current: 20 µA to 75 µA @ 1 V
Forward voltage: 900 mV to 1.5 V
Operating temperature range: Minimum -55°C to 175°C

Substitute parts are grouped into two categories:

Category A - Direct Equivalents (500 mW Power Rating): Parts maintaining the 500 mW power specification with matching or tighter tolerance specifications.

Category B - Functional Equivalents (400 mW Power Rating): Parts with reduced power rating (400 mW) suitable for applications not requiring full 500 mW dissipation capacity. These parts feature improved impedance characteristics and lower reverse leakage current.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Leakage @ 1V	Vf (Max)	Temp Range	Package
1N5223C-TAP	Vishay	2.7 V	±2%	500 mW	30 Ω	75 µA	1.1 V @ 200 mA	175°C	DO-35
1N5223B	Taiwan Semiconductor	2.7 V	±5%	500 mW	30 Ω	75 µA	1.1 V @ 200 mA	100°C	DO-35
BZX79-B2V7,113	NXP USA Inc.	2.7 V	±2%	400 mW	100 Ω	20 µA	900 mV @ 10 mA	-65°C ~ 200°C	DO-35
BZX79-B2V7,133	Nexperia USA Inc.	2.7 V	±2%	400 mW	100 Ω	20 µA	900 mV @ 10 mA	-65°C ~ 200°C	DO-35
BZX79-B2V7,143	NXP Semiconductors	2.7 V	±2%	400 mW	100 Ω	20 µA	900 mV @ 10 mA	-65°C ~ 200°C	DO-35
BZX79-C2V7,143	Nexperia USA Inc.	2.7 V	±5%	400 mW	100 Ω	20 µA	900 mV @ 10 mA	-65°C ~ 200°C	DO-35
BZX79C2V7-T50A	Fairchild Semiconductor	2.7 V	±5%	500 mW	100 Ω	75 µA	1.5 V @ 100 mA	-65°C ~ 200°C	DO-35
NZX2V7B,133	NXP USA Inc.	2.7 V	±4%	500 mW	100 Ω	20 µA	1.5 V @ 200 mA	-55°C ~ 175°C	DO-35

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

The 1N5223B from Taiwan Semiconductor Corporation is the primary direct equivalent. It maintains the 500 mW power rating, 2.7 V nominal zener voltage, and DO-35 package. The tolerance specification is ±5% compared to ±2% on the original part. The maximum operating temperature is 100°C, which is lower than the 175°C specification of the 1N5223C-TAP. This part is ROHS3 compliant and REACH unaffected, with 21,400 units in stock.

For Applications with Reduced Power Dissipation Requirements:

The BZX79-B2V7 series (part numbers BZX79-B2V7,113, BZX79-B2V7,133, and BZX79-B2V7,143) from NXP and Nexperia are suitable for circuits not requiring the full 500 mW dissipation. These parts maintain ±2% tolerance and feature extended operating temperature range (-65°C to 200°C). The 400 mW power rating is appropriate for low-power signal conditioning and voltage reference applications. All three variants are electrically identical; selection depends on packaging preference (bulk or cut tape) and supplier availability.

For Extended Temperature Range Applications:

The BZX79-B2V7,113, BZX79-B2V7,133, and BZX79-B2V7,143 parts operate from -65°C to 200°C, exceeding the 175°C maximum of the original part. These are suitable for automotive and industrial applications requiring enhanced thermal performance.

For Tolerance-Flexible Applications:

The BZX79-C2V7,143 from Nexperia USA Inc. provides ±5% tolerance with 400 mW power rating and extended temperature range. This part is appropriate for applications where tighter tolerance is not critical.

For Full 500 mW with Extended Temperature Range:

The BZX79C2V7-T50A from Fairchild Semiconductor maintains the 500 mW power rating with ±5% tolerance and operates from -65°C to 200°C. This part is suitable for high-temperature applications requiring full power dissipation capacity.

For Nexperia Preferred Sourcing:

The NZX2V7B,133 from NXP USA Inc. provides 500 mW power rating with ±4% tolerance and extended temperature range (-55°C to 175°C). This part features improved reverse leakage characteristics (20 µA) and is available in bulk packaging with 60,966 units in stock.

All substitute parts are through-hole mounted in DO-35 axial packages and are compatible with existing PCB layouts designed for the 1N5223C-TAP.

Frequently Asked Questions (FAQ)

Q: Can the 1N5223B be used as a direct replacement for the 1N5223C-TAP?

A: The 1N5223B is electrically compatible for most applications. Both parts share the same 2.7 V zener voltage, 500 mW power rating, and DO-35 package. The primary differences are tolerance (±5% versus ±2%) and maximum operating temperature (100°C versus 175°C). Applications operating below 100°C and tolerating ±5% voltage variation can use this substitute.

Q: What is the difference between the BZX79-B2V7 series and the original 1N5223C-TAP?

A: The BZX79-B2V7 series has a reduced power rating of 400 mW compared to 500 mW on the 1N5223C-TAP. However, it maintains ±2% tolerance and extends the operating temperature range to -65°C to 200°C. The impedance specification is higher (100 Ohms versus 30 Ohms). This part is suitable for applications not requiring full 500 mW dissipation.

Q: Are all substitute parts available in the same DO-35 package?

A: Yes, all substitute parts listed are packaged in DO-35 axial configuration (DO-204AH). They are mechanically compatible with PCB layouts designed for the 1N5223C-TAP.

Q: Which substitute part has the best reverse leakage characteristics?

A: The BZX79-B2V7 series (BZX79-B2V7,113, BZX79-B2V7,133, BZX79-B2V7,143) and BZX79-C2V7,143 feature reverse leakage current of 20 µA @ 1 V, compared to 75 µA on the original part. The NZX2V7B,133 also provides 20 µA leakage. These lower leakage values are beneficial for precision voltage reference and low-power applications.

Q: What is the difference between BZX79-B2V7,113, BZX79-B2V7,133, and BZX79-B2V7,143?

A: These three part numbers are electrically identical. The differences are in packaging and supplier designation. BZX79-B2V7,113 is supplied in bulk by NXP USA Inc., BZX79-B2V7,133 is supplied in cut tape by Nexperia USA Inc., and BZX79-B2V7,143 is supplied in bulk by NXP Semiconductors. Selection depends on packaging preference and supplier availability.

Q: Can I use the BZX79C2V7-T50A in automotive applications?

A: The BZX79C2V7-T50A from Fairchild Semiconductor is not listed with AEC-Q101 qualification. The original 1N5223C-TAP carries AEC-Q101 automotive qualification. For automotive applications requiring this certification, use the BZX79-B2V7 series or other AEC-Q101 qualified alternatives.

Q: Which substitute part has the widest operating temperature range?

A: The BZX79-B2V7 series (all three variants) and BZX79-C2V7,143 operate from -65°C to 200°C, providing the widest temperature range. The original 1N5223C-TAP operates to 175°C maximum.

Q: Is the NZX2V7B,133 suitable for high-temperature applications?

A: The NZX2V7B,133 operates from -55°C to 175°C, matching the upper temperature limit of the original part. It provides improved reverse leakage characteristics (20 µA) and maintains 500 mW power rating with ±4% tolerance.

Q: What packaging options are available for the substitute parts?

A: Substitute parts are available in bulk, cut tape (CT), and tape & box (TB) configurations. All are through-hole mounted in DO-35 axial packages. Specific packaging availability varies by part number and manufacturer.

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