BZX85B100-TR Equivalent & Substitute Parts

Part Overview

The BZX85B100-TR is a through-hole zener diode rated at 100 V nominal with 1.3 W maximum power dissipation, manufactured by Vishay General Semiconductor - Diodes Division. This component is packaged in DO-204AL (DO-41) axial configuration and is qualified to AEC-Q101 automotive standards with RoHS3 compliance.

The BZX85B100-TR is classified as obsolete. Equivalent and substitute zener diodes are available from active product lines that maintain the same nominal voltage and package configuration, enabling direct replacement in existing designs while accommodating variations in power rating, tolerance, and thermal operating range.

Key Parameters

Parameter	BZX85B100-TR
Voltage - Zener (Nom) (Vz)	100 V
Power - Max	1.3 W
Tolerance	±2%
Impedance (Max) (Zzt)	350 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 75 V
Operating Temperature	175°C
Package / Case	DO-204AL, DO-41, Axial
Mounting Type	Through Hole
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the BZX85B100-TR is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - Zener (Nom): 100 V
Package / Case: DO-204AL (DO-41) Axial
Mounting Type: Through Hole

Variable Parameters Affecting Substitution:

Power - Max: Substitute parts range from 1 W to 3 W
Tolerance: Substitute parts range from ±2% to ±20%
Impedance (Max): Substitute parts range from 175 Ohms to 350 Ohms
Current - Reverse Leakage: Substitute parts range from 500 nA to 5 µA
Operating Temperature: Substitute parts range from -65°C to 175°C
Product Status: Substitute parts are active production items
RoHS Status: Substitute parts vary between RoHS non-compliant and RoHS3 compliant

All substitute parts maintain the same 100 V nominal zener voltage and DO-204AL package, ensuring mechanical and electrical compatibility for direct circuit replacement.

Parameter Comparison

Part Number	Manufacturer	Voltage - Zener (Nom)	Power - Max	Tolerance	Impedance (Max)	Current - Reverse Leakage @ Vr	Operating Temperature	Product Status	RoHS Status
BZX85B100-TR	Vishay General Semiconductor	100 V	1.3 W	±2%	350 Ohms	500 nA @ 75 V	175°C	Obsolete	RoHS3 Compliant
1N4764 G	Microsemi Corporation	100 V	1 W	±10%	350 Ohms	5 µA @ 76 V	-65°C ~ 175°C	Active	RoHS non-compliant
1N4764A G	Microsemi Corporation	100 V	1 W	±5%	350 Ohms	5 µA @ 76 V	-65°C ~ 175°C	Active	RoHS non-compliant
1N5949CG	Microsemi Corporation	100 V	1.25 W	±2%	250 Ohms	1 µA @ 76 V	-65°C ~ 175°C	Active	RoHS non-compliant
2EZ100D/TR8	Microsemi Corporation	100 V	2 W	±20%	175 Ohms	500 nA @ 76 V	-65°C ~ 150°C	Active	RoHS non-compliant
2EZ100D2/TR12	Microsemi Corporation	100 V	2 W	±2%	175 Ohms	500 nA @ 76 V	-65°C ~ 150°C	Active	RoHS non-compliant
2EZ100D5	Microsemi Corporation	100 V	2 W	±5%	175 Ohms	500 nA @ 76 V	-65°C ~ 150°C	Active	RoHS non-compliant
2EZ100D5E3/TR8	Microsemi Corporation	100 V	2 W	±5%	175 Ohms	500 nA @ 76 V	-65°C ~ 150°C	Active	RoHS3 Compliant
3EZ100D/TR12	Microsemi Corporation	100 V	3 W	±20%	160 Ohms	500 nA @ 76 V	-65°C ~ 150°C	Active	RoHS non-compliant
3EZ100D/TR8	Microsemi Corporation	100 V	2 W	±20%	160 Ohms	500 nA @ 76 V	-65°C ~ 150°C	Active	RoHS non-compliant
3EZ100D10E3/TR12	Microsemi Corporation	100 V	3 W	±10%	160 Ohms	500 nA @ 76 V	-65°C ~ 150°C	Active	RoHS3 Compliant

Engineering Selection Recommendations

For RoHS3 Compliance Requirement:

The BZX85B100-TR is RoHS3 compliant. Among active substitute parts, only 2EZ100D5E3/TR8 and 3EZ100D10E3/TR12 maintain RoHS3 compliance. These parts are suitable for applications requiring regulatory compliance with current environmental standards.

For Tolerance and Voltage Regulation Precision:

The BZX85B100-TR specifies ±2% tolerance. Substitute parts maintaining ±2% tolerance are 1N5949CG and 2EZ100D2/TR12. The 1N5949CG provides the closest power rating match at 1.25 W, while 2EZ100D2/TR12 offers increased power dissipation at 2 W with lower impedance.

For Automotive Grade Applications:

The BZX85B100-TR carries AEC-Q101 automotive qualification. While substitute parts do not explicitly list automotive qualification in the provided data, 2EZ100D5E3/TR8 and 3EZ100D10E3/TR12 are RoHS3 compliant, indicating suitability for modern automotive and industrial applications.

For Power Dissipation Margin:

Applications requiring power dissipation margin above the original 1.3 W specification can utilize 2EZ100D series (2 W) or 3EZ100D series (3 W) parts. These provide increased thermal headroom while maintaining the same 100 V nominal voltage and DO-204AL package.

For Extended Temperature Range:

The BZX85B100-TR operates to 175°C maximum. Substitute parts 1N4764 G, 1N4764A G, and 1N5949CG extend the lower operating temperature to -65°C, providing broader environmental operating range for applications requiring cold-start performance.

Frequently Asked Questions (FAQ)

Q: Can 1N4764 G or 1N4764A G directly replace BZX85B100-TR?

A: Both parts maintain the 100 V nominal voltage and DO-204AL package. However, 1N4764 G has 1 W power rating (versus 1.3 W) and ±10% tolerance (versus ±2%), while 1N4764A G has ±5% tolerance. These are suitable for applications where the lower power rating and wider tolerance are acceptable.

Q: What is the advantage of 1N5949CG over 1N4764A G?

A: The 1N5949CG maintains ±2% tolerance matching the original BZX85B100-TR, provides 1.25 W power rating (closer to the original 1.3 W), and features lower impedance at 250 Ohms. It also specifies lower reverse leakage current at 1 µA versus 5 µA.

Q: Are 2EZ100D series parts suitable for the same applications?

A: Yes. The 2EZ100D series (2EZ100D/TR8, 2EZ100D2/TR12, 2EZ100D5, 2EZ100D5E3/TR8) all maintain 100 V nominal voltage and DO-204AL package. They provide increased power dissipation at 2 W and lower impedance at 175 Ohms. Tolerance varies from ±2% to ±20% depending on part number.

Q: Which substitute part offers RoHS3 compliance?

A: Two parts maintain RoHS3 compliance: 2EZ100D5E3/TR8 (2 W, ±5% tolerance) and 3EZ100D10E3/TR12 (3 W, ±10% tolerance). Both are active production items suitable for applications requiring current environmental compliance standards.

Q: What is the difference between 2EZ100D5 and 2EZ100D5E3/TR8?

A: Both parts have identical electrical specifications: 100 V, 2 W, ±5% tolerance, 175 Ohms impedance, and 500 nA reverse leakage. The primary difference is RoHS status: 2EZ100D5E3/TR8 is RoHS3 compliant while 2EZ100D5 is RoHS non-compliant.

Q: Can 3EZ100D series parts be used in place of BZX85B100-TR?

A: Yes. The 3EZ100D series maintains 100 V nominal voltage and DO-204AL package. Parts 3EZ100D/TR12, 3EZ100D/TR8, and 3EZ100D10E3/TR12 provide 2 W to 3 W power dissipation with lower impedance at 160 Ohms. Operating temperature is limited to -65°C to 150°C (versus 175°C for the original part).

Q: What tolerance specification should be selected for precision voltage regulation?

A: For applications requiring tight voltage regulation, select parts with ±2% tolerance: BZX85B100-TR (original, obsolete), 1N5949CG, or 2EZ100D2/TR12. These provide the tightest voltage tolerance among available options.

Q: Is there a substitute part with identical specifications to BZX85B100-TR?

A: No single substitute part matches all specifications of BZX85B100-TR. The 1N5949CG provides the closest match with 100 V, ±2% tolerance, and similar reverse leakage characteristics, but at 1.25 W power rating and with RoHS non-compliance. For RoHS3 compliance, 2EZ100D5E3/TR8 is the closest match with 100 V, ±5% tolerance, and 2 W power rating.

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