1N5223B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5223B-TP is a 2.7 V, 500 mW Zener diode manufactured by Micro Commercial Co in a DO-35 through-hole package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and production continuity. The 1N5223B-TP maintains ROHS3 compliance and operates across a temperature range of -55°C to 150°C. Equivalent parts must satisfy identical or superior electrical specifications while maintaining mechanical compatibility with the DO-35 axial package format.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	2.7	V
Tolerance	±5%	-
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	-55 to 150	°C
Mounting Type	Through Hole	-
Package / Case	DO-204AH, DO-35, Axial	-

Substitute Part Grouping Explanation

Substitution of the 1N5223B-TP is determined by strict equivalence in the following electrical and mechanical parameters:

Critical Substitution Parameters:

Voltage - Zener (Nom): 2.7 V (exact match required)
Power - Max: 500 mW (equal or greater)
Mounting Type: Through Hole (required)
Package / Case: DO-35 or DO-204AH (mechanical compatibility)

Acceptable Variation Parameters:

Tolerance: ±5% or tighter (±2% or ±10% acceptable for applications not requiring exact tolerance)
Impedance (Max): 30 Ohms or lower (lower impedance acceptable)
Current - Reverse Leakage @ Vr: 75 µA or lower (lower leakage acceptable)
Voltage - Forward (Vf) (Max) @ If: 1.1 V or lower (lower forward voltage acceptable)
Operating Temperature: -55°C to 150°C or wider range (extended range acceptable)

Substitute parts are grouped into three categories:

Direct Equivalents: Parts with identical electrical specifications (2.7 V, 500 mW, ±5% tolerance, 30 Ohms impedance, 1.1 V forward voltage) from active manufacturers.

Upgrade Equivalents: Parts with identical core specifications but extended operating temperature ranges or improved compliance status (ROHS3 compliant, active product status).

Compatible Alternatives: Parts with 2.7 V nominal voltage and 500 mW power rating but with tighter tolerance (±2%), lower impedance, or lower reverse leakage characteristics that provide enhanced performance within the same package format.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Reverse Leakage (µA @ 1V)	Vf (V @ 200mA)	Temp Range (°C)	Product Status	RoHS Status
1N5223B-TP	Micro Commercial Co	2.7	±5%	500	30	75 @ 1V	1.1 @ 200mA	-55 to 150	Obsolete	ROHS3
1N5223A (DO-35)TR	Microsemi Corporation	2.7	±10%	500	30	75 @ 1V	1.5 @ 200mA	-65 to 175	Active	ROHS3
1N5223B BK TIN/LEAD	Central Semiconductor Corp	2.7	±5%	500	30	75 @ 1V	1.1 @ 200mA	-65 to 200	Active	Non-compliant
1N5223B TR PBFREE	Central Semiconductor Corp	2.7	±5%	500	30	75 @ 1V	1.1 @ 200mA	-65 to 200	Active	ROHS3
1N5223B	Taiwan Semiconductor Corporation	2.7	±5%	500	30	75 @ 1V	1.1 @ 200mA	100 (TJ)	Active	ROHS3
1N5223B-TAP	Vishay General Semiconductor - Diodes Division	2.7	±5%	500	30	75 @ 1V	1.1 @ 200mA	-55 to 175	Active	ROHS3
1N5223B-TR	Vishay General Semiconductor - Diodes Division	2.7	±5%	500	30	75 @ 1V	1.1 @ 200mA	Not specified	Active	ROHS3
1N5223C-TAP	Vishay General Semiconductor - Diodes Division	2.7	±2%	500	30	75 @ 1V	1.1 @ 200mA	-55 to 175	Active	ROHS3
1N5223C-TR	Vishay General Semiconductor - Diodes Division	2.7	±2%	500	30	75 @ 1V	1.1 @ 200mA	-55 to 175	Active	ROHS3
BZX55B2V7-TAP	Vishay General Semiconductor - Diodes Division	2.7	±2%	500	85	10 @ 1V	1.5 @ 200mA	-65 to 175	Active	ROHS3
BZX55B2V7-TR	Vishay General Semiconductor - Diodes Division	2.7	±2%	500	85	10 @ 1V	1.5 @ 200mA	-65 to 175	Active	ROHS3

Engineering Selection Recommendations

Direct Equivalent Selection (Preferred for Obsolete Part Replacement):

The 1N5223B-TAP and 1N5223B-TR from Vishay General Semiconductor - Diodes Division provide direct electrical and mechanical equivalence to the 1N5223B-TP. Both parts maintain identical specifications: 2.7 V nominal voltage, ±5% tolerance, 500 mW power rating, 30 Ohms impedance, and 1.1 V forward voltage. Both are active products with ROHS3 compliance. The 1N5223B-TAP is qualified to AEC-Q101 automotive standards and operates across -55°C to 175°C. The 1N5223B-TR is also active and ROHS3 compliant. These parts are suitable for direct substitution in existing designs without circuit modification.

Upgrade Equivalent Selection (Extended Temperature Range):

The 1N5223B TR PBFREE from Central Semiconductor Corp offers identical electrical specifications with extended operating temperature range (-65°C to 200°C) and active product status. This part is ROHS3 compliant and available in tape and reel packaging. The 1N5223B BK TIN/LEAD variant from the same manufacturer provides identical electrical performance but is RoHS non-compliant and should be selected only when legacy compliance requirements are not applicable.

Enhanced Performance Alternative (Tighter Tolerance):

The 1N5223C-TAP and 1N5223C-TR from Vishay General Semiconductor - Diodes Division provide tighter tolerance specification (±2% versus ±5%) while maintaining all other electrical parameters identical to the original part. Both are AEC-Q101 qualified and operate across -55°C to 175°C. These parts are suitable for applications requiring improved voltage regulation accuracy.

Compatible Alternative (Lower Impedance and Leakage):

The BZX55B2V7-TAP and BZX55B2V7-TR from Vishay General Semiconductor - Diodes Division maintain 2.7 V nominal voltage and 500 mW power rating but feature lower impedance (85 Ohms versus 30 Ohms) and significantly lower reverse leakage current (10 µA versus 75 µA). These parts are AEC-Q101 qualified and operate across -65°C to 175°C. The higher impedance and lower leakage characteristics provide enhanced performance in precision voltage reference applications.

Tolerance Consideration:

The 1N5223A (DO-35)TR from Microsemi Corporation is active and ROHS3 compliant but features ±10% tolerance specification. This part is suitable only for applications where voltage tolerance of ±10% is acceptable. The extended operating temperature range (-65°C to 175°C) provides improved thermal performance.

Frequently Asked Questions (FAQ)

Q: Can the 1N5223B-TP be directly replaced with the 1N5223B-TAP or 1N5223B-TR?

A: Yes. The 1N5223B-TAP and 1N5223B-TR are direct electrical and mechanical equivalents. Both maintain identical 2.7 V nominal voltage, ±5% tolerance, 500 mW power rating, and DO-35 package format. Both are active products with ROHS3 compliance. No circuit modification is required.

Q: What is the difference between 1N5223B and 1N5223C variants?

A: The primary difference is tolerance specification. The 1N5223B series maintains ±5% tolerance, while the 1N5223C series provides tighter ±2% tolerance. All other electrical parameters remain identical. The 1N5223C variants are suitable for applications requiring improved voltage regulation accuracy.

Q: Are the BZX55B2V7 parts suitable replacements for the 1N5223B-TP?

A: The BZX55B2V7-TAP and BZX55B2V7-TR are compatible alternatives with identical 2.7 V nominal voltage and 500 mW power rating. However, these parts feature different impedance (85 Ohms versus 30 Ohms) and significantly lower reverse leakage current (10 µA versus 75 µA). These characteristics provide enhanced performance in precision applications but may alter circuit behavior in designs dependent on the original impedance specification. Electrical verification is required for applications sensitive to impedance characteristics.

Q: What packaging options are available for equivalent parts?

A: Equivalent parts are available in multiple packaging formats: Cut Tape (CT), Tape & Reel (TR), Tape & Box (TB), and Bulk. The 1N5223B-TAP and 1N5223B-TR are available in cut tape format. The 1N5223C-TAP is available in tape and box format, while 1N5223C-TR is available in tape and reel format. Selection depends on production volume and assembly process requirements.

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

A: The 1N5223B BK TIN/LEAD and 1N5223B TR PBFREE from Central Semiconductor Corp offer the widest operating temperature range (-65°C to 200°C). These parts are suitable for applications requiring extended thermal performance beyond the original -55°C to 150°C specification.

Q: Are all substitute parts ROHS3 compliant?

A: Most substitute parts are ROHS3 compliant. The exception is the 1N5223B BK TIN/LEAD from Central Semiconductor Corp, which is RoHS non-compliant. This part should be selected only when legacy compliance requirements are not applicable or when specific design constraints require tin/lead finish.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 qualification indicates that the component meets automotive industry reliability and quality standards. The 1N5223B-TAP, 1N5223C-TAP, 1N5223C-TR, BZX55B2V7-TAP, and BZX55B2V7-TR are all AEC-Q101 qualified. These parts are suitable for automotive and high-reliability applications.

Q: Can the 1N5223A (DO-35)TR be used as a direct replacement?

A: The 1N5223A (DO-35)TR is electrically compatible but features ±10% tolerance specification compared to the original ±5%. This part is suitable only for applications where the wider tolerance is acceptable. The extended operating temperature range (-65°C to 175°C) provides improved thermal performance. Electrical verification is required to confirm tolerance compatibility with circuit design requirements.

Q: What is the inventory status of equivalent parts?

A: Multiple substitute parts maintain substantial inventory levels. The 1N5223B-TAP from Vishay has 30,858 units in stock, while the 1N5223B-TR has 43,970 units. The BZX55B2V7-TR has 55,433 units available. The 1N5223B from Taiwan Semiconductor Corporation has the highest inventory at 21,400 units. These inventory levels support immediate procurement for production requirements.

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