ZPY100-TR Zener Diode 100V 1.3W Equivalent & Substitute Parts

Part Overview

The ZPY100-TR 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, which necessitates identification of active equivalent and substitute parts for ongoing design support and procurement. The ZPY100-TR is AEC-Q101 qualified for automotive applications and RoHS3 compliant. Substitute parts must maintain the 100 V nominal Zener voltage and through-hole axial mounting configuration while accommodating variations in power rating, tolerance, and impedance within acceptable design parameters.

Key Parameters

Parameter	ZPY100-TR	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 of the ZPY100-TR is determined by the following critical parameters:

Primary Criteria (Non-Negotiable):

Voltage - Zener (Nom): 100 V (all substitutes must match exactly)
Package / Case: DO-204AL (DO-41) axial through-hole (all substitutes must match exactly)
Mounting Type: Through Hole (all substitutes must match exactly)

Secondary Criteria (Allowable Variation):

Power - Max: ZPY100-TR rated at 1.3 W; substitutes range from 1 W to 2 W. Lower power ratings (1 W) represent derating; higher power ratings (1.25 W, 2 W) provide margin.
Tolerance: ZPY100-TR specified at ±5%; substitutes available at ±10%, ±5%, ±2%, and ±1%. Tighter tolerances are acceptable; looser tolerances require circuit validation.
Impedance (Max): ZPY100-TR at 130 Ohms; substitutes range from 175 to 350 Ohms. Higher impedance affects transient response and noise filtering characteristics.
Current - Reverse Leakage: ZPY100-TR at 500 nA @ 75 V; substitutes range from 500 nA to 5 µA. Higher leakage current affects standby power consumption.
Operating Temperature: ZPY100-TR maximum 175°C; substitutes range from 150°C to 175°C. Lower maximum temperature limits thermal headroom.
Product Status: ZPY100-TR is obsolete; all listed substitutes are active.
RoHS Status: ZPY100-TR is RoHS3 compliant; most substitutes are RoHS non-compliant except 2EZ100D10E3/TR12.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Ir @ Vr	Temp (Max)	Status	RoHS
ZPY100-TR	Vishay	100 V	±5%	1.3 W	130 Ω	500 nA @ 75 V	175°C	Obsolete	RoHS3
1N4764 G	Microsemi	100 V	±10%	1 W	350 Ω	5 µA @ 76 V	175°C	Active	Non-compliant
1N4764A G	Microsemi	100 V	±5%	1 W	350 Ω	5 µA @ 76 V	175°C	Active	Non-compliant
1N5949AG	Microsemi	100 V	±10%	1.25 W	250 Ω	1 µA @ 76 V	175°C	Active	Non-compliant
1N5949B G	Microsemi	100 V	±5%	1.25 W	250 Ω	1 µA @ 76 V	175°C	Active	Non-compliant
1N5949CG	Microsemi	100 V	±2%	1.25 W	250 Ω	1 µA @ 76 V	175°C	Active	Non-compliant
1N5949DG	Microsemi	100 V	±1%	1.25 W	250 Ω	1 µA @ 76 V	175°C	Active	Non-compliant
2EZ100D/TR8	Microsemi	100 V	±20%	2 W	175 Ω	500 nA @ 76 V	150°C	Active	Non-compliant
2EZ100D10/TR12	Microsemi	100 V	±10%	2 W	175 Ω	500 nA @ 76 V	150°C	Active	Non-compliant
2EZ100D10/TR8	Microsemi	100 V	±10%	2 W	175 Ω	500 nA @ 76 V	150°C	Active	Non-compliant
2EZ100D10E3/TR12	Microsemi	100 V	±10%	2 W	175 Ω	500 nA @ 76 V	150°C	Active	RoHS3

Engineering Selection Recommendations

For Direct Replacement (Matched Specifications):

1N5949B G and 1N5949CG are the closest functional equivalents to ZPY100-TR. Both maintain the 100 V nominal Zener voltage, ±5% or tighter tolerance, and 175°C maximum operating temperature. 1N5949B G matches the ±5% tolerance specification exactly. 1N5949CG offers ±2% tolerance for applications requiring tighter voltage regulation. Both are active products with current inventory availability.

For Applications Requiring Higher Power Margin:

The 1N5949 series (1N5949AG, 1N5949B G, 1N5949CG, 1N5949DG) provides 1.25 W power rating compared to ZPY100-TR's 1.3 W, representing a 3.8% reduction. These parts are suitable for designs with adequate thermal management or lower dissipation requirements. The 2EZ100 series (2EZ100D/TR8, 2EZ100D10/TR12, 2EZ100D10/TR8, 2EZ100D10E3/TR12) provides 2 W power rating, offering significant margin for high-dissipation applications. However, 2EZ100 series parts have maximum operating temperature of 150°C, reducing thermal headroom by 25°C compared to ZPY100-TR.

For RoHS3 Compliance Requirement:

2EZ100D10E3/TR12 is the only substitute maintaining RoHS3 compliance status. This part is suitable for applications requiring environmental compliance matching the original ZPY100-TR specification. It provides 2 W power rating and ±10% tolerance.

For Tolerance-Critical Applications:

1N5949DG offers ±1% tolerance, the tightest specification available in the substitute list. This part is appropriate for precision voltage regulation circuits where ZPY100-TR's ±5% tolerance is insufficient.

Regarding RoHS Non-Compliance:

All Microsemi substitutes except 2EZ100D10E3/TR12 are RoHS non-compliant. Design teams must evaluate whether RoHS compliance is a mandatory requirement for the application. If RoHS3 compliance is required, 2EZ100D10E3/TR12 is the only viable substitute despite its lower maximum operating temperature.

Frequently Asked Questions (FAQ)

Q: Can 1N4764 G (1 W) replace ZPY100-TR (1.3 W)?

A: 1N4764 G is electrically compatible at 100 V nominal Zener voltage and DO-204AL package. However, the 1 W power rating represents a 23% reduction from ZPY100-TR's 1.3 W specification. This substitution is valid only if circuit analysis confirms that actual power dissipation in the Zener diode does not exceed 1 W under all operating conditions, including worst-case scenarios. Additionally, 1N4764 G has ±10% tolerance versus ZPY100-TR's ±5%, which may affect voltage regulation precision.

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

A: All four parts share identical electrical specifications except for tolerance: 1N5949AG (±10%), 1N5949B G (±5%), 1N5949CG (±2%), and 1N5949DG (±1%). All are rated 100 V, 1.25 W, with 250 Ohms maximum impedance and 1 µA reverse leakage current. Selection depends on voltage regulation tolerance requirements. 1N5949B G matches ZPY100-TR's ±5% tolerance exactly.

Q: Why do 2EZ100 series parts have lower maximum operating temperature (150°C vs. 175°C)?

A: The 2EZ100 series is a different product line with different thermal characteristics. The 150°C maximum operating temperature is a specified parameter for this series. Applications operating near 175°C thermal limits cannot use 2EZ100 substitutes without thermal redesign. Verify that actual operating temperature remains below 150°C before selecting 2EZ100 parts.

Q: Is higher impedance (Zzt) in substitute parts a concern?

A: Impedance affects transient response and noise filtering. ZPY100-TR specifies 130 Ohms maximum impedance. Substitutes range from 175 to 350 Ohms. Higher impedance results in slower transient response and reduced high-frequency noise attenuation. For applications sensitive to voltage transients or requiring low-impedance regulation, select substitutes with lower impedance: 1N5949 series (250 Ohms) or 2EZ100 series (175 Ohms) are preferable to 1N4764 series (350 Ohms).

Q: Can I use 2EZ100D10E3/TR12 as a direct replacement for RoHS3 compliance?

A: 2EZ100D10E3/TR12 is RoHS3 compliant and maintains 100 V nominal Zener voltage and DO-204AL package. However, it differs in three parameters: 2 W power rating (vs. 1.3 W), ±10% tolerance (vs. ±5%), and 150°C maximum operating temperature (vs. 175°C). These differences are acceptable if circuit analysis confirms power dissipation does not exceed 2 W, voltage tolerance of ±10% is acceptable, and operating temperature remains below 150°C.

Q: What is the significance of reverse leakage current differences?

A: ZPY100-TR specifies 500 nA reverse leakage at 75 V. 1N5949 series parts specify 1 µA at 76 V (2× higher), while 1N4764 series specifies 5 µA at 76 V (10× higher). Higher reverse leakage increases standby power consumption and affects circuit performance in low-power or precision applications. For standby-sensitive designs, 1N5949 series or 2EZ100 series (500 nA) are preferable to 1N4764 series.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts are packaged in DO-204AL (DO-41) axial through-hole configuration, matching ZPY100-TR's physical package. No PCB layout modifications are required for mechanical compatibility.

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