UDZS20B Zener Diode Equivalent & Substitute Parts

Part Overview

The UDZS20B is a surface mount Zener diode manufactured by Taiwan Semiconductor Corporation, rated for 20 V nominal Zener voltage with 200 mW maximum power dissipation. The device is packaged in SOD-323F and is designed for small signal applications requiring voltage regulation and transient protection. The UDZS20B maintains Active product status and is RoHS3 compliant, making it suitable for current production environments. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to inventory constraints, packaging format preferences, or supply chain considerations.

Substiute Parts

UDZS20B

Taiwan Semiconductor CorporationIn Stock: 35296UDZS20B Datasheet

Current PartRFQ

UDZS20B R9G

Taiwan Semiconductor CorporationIn Stock: 11206UDZS20B R9G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UDZS20B is permissible when the replacement component maintains identical electrical specifications and mechanical compatibility. The critical parameters governing substitution are:

• Voltage - Zener (Nominal): 20 V
• Power - Maximum: 200 mW
• Tolerance: ±2%
• Impedance (Maximum): 60 Ohms
• Current - Reverse Leakage @ Vr: 45 nA @ 15 V
• Operating Temperature Range: -55°C to 150°C
• Package / Case: SC-90, SOD-323F
• Mounting Type: Surface Mount

The UDZS20B R9G is classified as a parametric equivalent substitute. This part is manufactured by the same supplier (Taiwan Semiconductor Corporation) and shares identical electrical ratings and thermal specifications. The primary distinction between the main part and substitute is the packaging format: the UDZS20B is supplied in Tape & Reel (TR) format, while the UDZS20B R9G is supplied in Cut Tape (CT) & Digi-Reel® format. Both formats are compatible with standard surface mount assembly processes.

Parameter Comparison

Engineering Selection Recommendations

The UDZS20B and UDZS20B R9G are direct electrical and mechanical equivalents. Selection between these parts is determined by packaging and supply chain requirements rather than functional performance.

UDZS20B (Tape & Reel format): Select this part number when high-volume automated assembly processes require continuous reel feeding. This format is optimized for pick-and-place equipment with standard reel interfaces.

UDZS20B R9G (Cut Tape & Digi-Reel® format): Select this part number when lower-volume production runs, manual assembly, or mixed-component kitting is required. The Cut Tape format provides flexibility for component handling and inventory management. The Digi-Reel® option offers an alternative reel format compatible with specific assembly equipment.

Both parts maintain identical electrical performance, thermal characteristics, and regulatory compliance (RoHS3, REACH Unaffected, EAR99 classification). The choice between formats does not affect circuit functionality, reliability, or long-term performance. Moisture Sensitivity Level (MSL) for the UDZS20B R9G is rated as MSL 1 (Unlimited), indicating no moisture-related storage restrictions.

Frequently Asked Questions (FAQ)

Q: Can the UDZS20B R9G be used as a direct replacement for the UDZS20B in production?

A: Yes. The UDZS20B R9G is a parametric equivalent with identical electrical specifications, thermal ratings, and package dimensions. The only difference is the supply format (Cut Tape & Digi-Reel® versus Tape & Reel). Both formats are compatible with standard surface mount assembly processes.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel® packaging?

A: Tape & Reel (TR) format supplies components on a continuous reel, optimized for high-speed automated assembly. Cut Tape (CT) & Digi-Reel® format provides components on cut tape segments with an alternative reel interface, suitable for lower-volume production or mixed-component applications. Both formats contain the same component in the same SOD-323F package.

Q: Are there any electrical performance differences between UDZS20B and UDZS20B R9G?

A: No. Both parts have identical Zener voltage (20 V), power rating (200 mW), tolerance (±2%), impedance (60 Ohms maximum), reverse leakage current (45 nA @ 15 V), and operating temperature range (-55°C to 150°C).

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the UDZS20B and UDZS20B R9G are RoHS3 compliant, REACH Unaffected, and classified as EAR99 for export control purposes. Both share the same HTSUS code (8541.10.0050).

Q: What does MSL 1 (Unlimited) mean for the UDZS20B R9G?

A: MSL 1 (Unlimited) indicates that the component has no moisture sensitivity restrictions. The part can be stored and handled without special moisture control measures, and there are no time-limited shelf life constraints related to moisture absorption.

Q: Can these parts be used interchangeably in the same circuit design?

A: Yes. The UDZS20B and UDZS20B R9G are functionally and mechanically interchangeable. Circuit performance, voltage regulation, transient protection, and thermal behavior are identical. Selection is based solely on assembly process requirements and supply chain logistics.