TZX36A-TR Equivalent & Substitute Parts

Part Overview

The TZX36A-TR is an active-status Zener diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 36 V nominal Zener voltage with 500 mW maximum power dissipation. The device is packaged in DO-204AH (DO-35) axial through-hole configuration and is qualified to AEC-Q101 automotive standards. Substitute parts are identified when equivalent electrical performance, power rating, and mechanical compatibility are required due to component availability, supply chain constraints, or design flexibility within specified tolerance bands.

Substiute Parts

TZX36A-TR

Vishay General Semiconductor - Diodes DivisionIn Stock: 963TZX36A-TR Datasheet

Current PartRFQ

NZX36A,133

Nexperia USA Inc.In Stock: 835NZX36A,133 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TZX36A-TR is permissible when the following criteria are met:

Electrical Compatibility Requirements:

• Zener voltage nominal rating within the application tolerance band (TZX36A-TR: 36 V nominal; substitute: 34.95 V nominal with ±2% tolerance)
• Maximum power dissipation rating equal to or greater than 500 mW
• Maximum impedance (Zzt) equal to or less than 140 Ohms
• Forward voltage drop (Vf) at 200 mA not exceeding 1.5 V
• Operating temperature range encompassing the application requirements

Mechanical Compatibility Requirements:

• Through-hole axial package configuration (DO-204AH / DO-35)
• Identical lead spacing and physical dimensions

Compliance Requirements:

• RoHS3 compliance maintained
• REACH unaffected status maintained
• Moisture sensitivity level (MSL) of 1 or better

The NZX36A,133 manufactured by Nexperia USA Inc. meets all substitution criteria for the TZX36A-TR within these defined parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (TZX36A-TR): The TZX36A-TR is the specified component and remains the first choice. It is active-status, AEC-Q101 qualified for automotive applications, and maintains full compliance with RoHS3 and REACH requirements. Current inventory of 875 pieces supports immediate procurement.

Substitute Part (NZX36A,133): The NZX36A,133 is an active-status substitute manufactured by Nexperia USA Inc. It provides equivalent electrical performance across all critical parameters: identical 500 mW power rating, 140 Ohm maximum impedance, and 1.5 V forward voltage specification. The nominal Zener voltage of 34.95 V with ±2% tolerance is compatible with applications designed for 36 V operation. Both devices share identical package configuration (DO-204AH / DO-35 axial through-hole), identical RoHS3 and REACH compliance status, and identical MSL rating. The operating temperature range of the NZX36A,133 (-55°C to 175°C) is a subset of the TZX36A-TR range (-65°C to 175°C); applications requiring operation below -55°C must use the primary part. Current inventory of 810 pieces supports procurement as an alternative source.

Frequently Asked Questions (FAQ)

Q: Can the NZX36A,133 be used in place of the TZX36A-TR in all applications?

A: The NZX36A,133 is electrically and mechanically compatible with the TZX36A-TR for applications operating within the temperature range of -55°C to 175°C. Applications requiring operation below -55°C must use the TZX36A-TR, which is rated to -65°C.

Q: What is the significance of the 1.05 V difference in nominal Zener voltage (36 V vs. 34.95 V)?

A: The NZX36A,133 nominal voltage of 34.95 V represents a 2.9% reduction from the TZX36A-TR nominal voltage of 36 V. The ±2% tolerance specification on the NZX36A,133 provides a voltage range of 34.25 V to 35.65 V. Circuit designs must verify that this voltage range is acceptable for the intended application. The TZX36A-TR does not specify a tolerance value in the provided data.

Q: Are the package dimensions identical between these two parts?

A: Both the TZX36A-TR and NZX36A,133 use the DO-204AH (DO-35) axial through-hole package configuration. Physical dimensions and lead spacing are identical, permitting direct mechanical substitution on printed circuit boards.

Q: Do both parts meet automotive qualification standards?

A: The TZX36A-TR carries AEC-Q101 automotive qualification. The NZX36A,133 does not specify AEC-Q101 qualification in the provided data. Applications requiring automotive qualification must use the TZX36A-TR.

Q: What is the difference in reverse leakage current between these parts?

A: The TZX36A-TR specifies 1 µA reverse leakage at 27 V, while the NZX36A,133 specifies 50 nA reverse leakage at 25.2 V. The NZX36A,133 exhibits lower reverse leakage current. Both values are acceptable for standard Zener diode applications; circuit designs sensitive to leakage current should evaluate the specific measurement conditions.

Q: Are both parts RoHS3 and REACH compliant?

A: Yes. Both the TZX36A-TR and NZX36A,133 are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Can these parts be used interchangeably in high-temperature applications?

A: Both parts are rated to 175°C maximum operating temperature, supporting high-temperature applications within this limit. The TZX36A-TR provides extended low-temperature capability to -65°C, while the NZX36A,133 is rated to -55°C minimum.