ZPY100-TAP Zener Diode Equivalent & Substitute Parts

Part Overview

The ZPY100-TAP is a 100 V, 1.3 W Zener diode manufactured by Vishay General Semiconductor - Diodes Division in DO-204AL (DO-41) axial through-hole package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design support and procurement. The ZPY100-TAP is qualified to AEC-Q101 automotive standards and is RoHS3 compliant. Substitute parts must maintain electrical compatibility across zener voltage, power dissipation, and package specifications while accounting for tolerance and leakage current variations.

Key Parameters

Parameter	ZPY100-TAP	Unit
Voltage - Zener (Nom)	100	V
Tolerance	±5%	—
Power - Max	1.3	W
Impedance (Max)	130	Ohms
Current - Reverse Leakage @ Vr	500 nA @ 75 V	—
Operating Temperature	175	°C
Package / Case	DO-204AL (DO-41)	—
Mounting Type	Through Hole	—
Grade	Automotive	—
Qualification	AEC-Q101	—
RoHS Status	RoHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria applied strictly to the provided parameters:

Primary Compatibility Criteria:

Zener voltage (Nom): 100 V (exact match required)
Package / Case: DO-204AL (DO-41) axial through-hole (exact match required)
Mounting Type: Through Hole (exact match required)
Power - Max: Equal to or greater than 1.3 W
Impedance (Max): Lower impedance values indicate better regulation characteristics
Current - Reverse Leakage @ Vr: Lower values indicate superior leakage performance
Operating Temperature: Must support minimum 175°C upper limit

Tolerance Consideration: Tolerance values (±1%, ±2%, ±5%, ±10%, ±20%) affect voltage accuracy but do not preclude substitution. Tighter tolerances provide superior voltage regulation.

Compliance Consideration: RoHS status and AEC-Q101 qualification are noted but do not restrict substitution eligibility based on electrical parameters alone.

All substitute parts listed maintain 100 V zener voltage and DO-204AL package specifications. Power ratings range from 1 W to 2 W, accommodating applications requiring 1.3 W or less. Impedance values range from 130 Ohms to 350 Ohms, with lower values providing superior regulation.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Impedance (Max)	Reverse Leakage @ Vr	Operating Temp	Product Status	RoHS Status
ZPY100-TAP	Vishay	100 V	±5%	1.3 W	130 Ω	500 nA @ 75 V	175°C	Obsolete	RoHS3
1N4764A G	Microsemi	100 V	±5%	1 W	350 Ω	5 µA @ 76 V	-65°C ~ 175°C	Active	Non-compliant
1N5949AG	Microsemi	100 V	±10%	1.25 W	250 Ω	1 µA @ 76 V	-65°C ~ 175°C	Active	Non-compliant
1N5949B G	Microsemi	100 V	±5%	1.25 W	250 Ω	1 µA @ 76 V	-65°C ~ 175°C	Active	Non-compliant
1N5949CG	Microsemi	100 V	±2%	1.25 W	250 Ω	1 µA @ 76 V	-65°C ~ 175°C	Active	Non-compliant
1N5949DG	Microsemi	100 V	±1%	1.25 W	250 Ω	1 µA @ 76 V	-65°C ~ 175°C	Active	Non-compliant
2EZ100D/TR12	Microsemi	100 V	±20%	2 W	175 Ω	500 nA @ 76 V	-65°C ~ 150°C	Active	Non-compliant
2EZ100D/TR8	Microsemi	100 V	±20%	2 W	175 Ω	500 nA @ 76 V	-65°C ~ 150°C	Active	Non-compliant
2EZ100D10/TR12	Microsemi	100 V	±10%	2 W	175 Ω	500 nA @ 76 V	-65°C ~ 150°C	Active	Non-compliant
2EZ100D10E3/TR8	Microsemi	100 V	±10%	2 W	175 Ω	500 nA @ 76 V	-65°C ~ 150°C	Active	RoHS3
2EZ100D2/TR12	Microsemi	100 V	±2%	2 W	175 Ω	500 nA @ 76 V	-65°C ~ 150°C	Active	Non-compliant

Engineering Selection Recommendations

Active Substitute Parts with Matching Tolerance (±5%):

The 1N5949B G offers direct electrical compatibility with the ZPY100-TAP. Both components specify ±5% tolerance and 100 V zener voltage. The 1N5949B G provides 1.25 W power rating, exceeding the 1.3 W requirement of the ZPY100-TAP. Operating temperature range extends to -65°C, providing superior low-temperature performance. Product status is active, ensuring long-term availability. RoHS compliance status differs; the 1N5949B G is non-compliant.

Active Substitute Parts with Superior Tolerance (±1% to ±2%):

The 1N5949CG and 1N5949DG provide tighter voltage tolerances (±2% and ±1% respectively) compared to the ZPY100-TAP (±5%). These components deliver improved voltage regulation accuracy. Both maintain 100 V zener voltage, 1.25 W power rating, and DO-204AL package. Product status is active. Reverse leakage current is 1 µA at 76 V, superior to the ZPY100-TAP specification of 500 nA at 75 V.

Higher Power Rating Alternatives (2 W):

The 2EZ100D10E3/TR8 is the only substitute part combining 2 W power rating with RoHS3 compliance matching the ZPY100-TAP. This component provides ±10% tolerance, 100 V zener voltage, and active product status. Operating temperature maximum is 150°C, which is 25°C lower than the ZPY100-TAP. Impedance is 175 Ohms, providing superior regulation compared to the ZPY100-TAP at 130 Ohms.

Lower Power Rating Alternative (1 W):

The 1N4764A G operates at 1 W maximum power, below the ZPY100-TAP specification of 1.3 W. This component is suitable only for applications with reduced power dissipation requirements. Impedance is 350 Ohms, the highest among all listed substitutes, resulting in poorer voltage regulation. Product status is active.

Frequently Asked Questions (FAQ)

Q: Can the 1N5949B G directly replace the ZPY100-TAP in all applications?

A: The 1N5949B G maintains identical zener voltage (100 V), tolerance (±5%), and package (DO-204AL). Power rating is 1.25 W, which accommodates applications requiring up to 1.3 W. Operating temperature range is -65°C to 175°C, meeting the ZPY100-TAP maximum of 175°C. Direct substitution is electrically valid for applications within these specifications.

Q: What is the significance of impedance differences between substitute parts?

A: Impedance (Zzt) determines the zener diode's dynamic resistance and voltage regulation quality. Lower impedance values provide superior voltage stability under load variations. The ZPY100-TAP specifies 130 Ohms impedance. The 1N5949 series (250 Ohms) and 2EZ100 series (175 Ohms) exhibit higher impedance, resulting in slightly reduced regulation performance. Applications requiring tight voltage regulation should prioritize lower impedance values.

Q: Why do some substitute parts have higher reverse leakage current specifications?

A: Reverse leakage current increases with temperature and applied voltage. The 1N5949 series specifies 1 µA at 76 V, compared to the ZPY100-TAP at 500 nA at 75 V. Higher leakage current indicates greater minority carrier generation within the diode junction. This parameter affects circuit performance in high-impedance applications and low-current bias conditions. Applications sensitive to leakage current should evaluate this specification against circuit requirements.

Q: Is RoHS compliance a substitution requirement?

A: RoHS compliance is a regulatory and procurement consideration, not an electrical substitution criterion. The ZPY100-TAP is RoHS3 compliant. Most substitute parts listed are non-compliant, with the exception of 2EZ100D10E3/TR8. Compliance requirements depend on end-product regulations and customer specifications. Electrical substitution remains valid regardless of RoHS status.

Q: Can the 2EZ100D10E3/TR8 replace the ZPY100-TAP in automotive applications?

A: The 2EZ100D10E3/TR8 maintains 100 V zener voltage, DO-204AL package, and RoHS3 compliance. However, the operating temperature maximum is 150°C, which is 25°C lower than the ZPY100-TAP specification of 175°C. Automotive applications operating near 175°C upper temperature limits may exceed the 2EZ100D10E3/TR8 rating. Thermal analysis of the specific application is required to confirm suitability.

Q: What is the difference between 1N5949AG, 1N5949B G, 1N5949CG, and 1N5949DG?

A: All four parts share identical zener voltage (100 V), power rating (1.25 W), impedance (250 Ohms), and operating temperature range (-65°C to 175°C). The primary difference is tolerance specification: 1N5949AG (±10%), 1N5949B G (±5%), 1N5949CG (±2%), and 1N5949DG (±1%). Tighter tolerance parts provide superior voltage accuracy. Selection depends on circuit voltage regulation requirements and tolerance budget.

Q: Are the 2EZ100D/TR12 and 2EZ100D/TR8 electrically identical?

A: Yes. Both parts specify identical electrical parameters: 100 V zener voltage, ±20% tolerance, 2 W power rating, 175 Ohms impedance, and 500 nA reverse leakage at 76 V. The designation suffix (TR12 versus TR8) indicates packaging configuration or tape reel specifications, not electrical differences. Electrical substitution between these parts is valid.

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