DFLZ51-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The DFLZ51-TP is a 51 V, 1 W surface mount zener diode manufactured by Micro Commercial Co, packaged in SOD-123FL format. This component is classified as an active product and is RoHS3 compliant. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage applications in electronic circuits. Substitute parts may be required due to inventory availability, supply chain constraints, or specific application requirements such as automotive qualification or packaging format preferences.

Substiute Parts

DFLZ51-TP

Micro Commercial CoIn Stock: 920DFLZ51-TP Datasheet

Current PartRFQ

KDZLVTFTR51

Rohm SemiconductorIn Stock: 3230KDZLVTFTR51 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DFLZ51-TP zener diode is determined by the following critical parameters:

Primary Substitution Criteria:

• Zener voltage rating: 51 V nominal
• Maximum power dissipation: 1 W
• Package type: SOD-123F surface mount
• Reverse leakage current: 5 µA at reference voltage
• Operating temperature range: minimum -55°C to 150°C
• RoHS3 compliance and MSL 1 classification

The KDZLVTFTR51 from Rohm Semiconductor meets these core electrical and mechanical requirements. Both parts share identical zener voltage, power rating, package format, and reverse leakage specifications. The substitute part maintains compatibility with the same PCB footprint and thermal characteristics. Packaging format differs (Cut Tape & Digi-Reel versus Tape & Reel), which affects procurement and assembly processes but not electrical performance.

Parameter Comparison

Engineering Selection Recommendations

DFLZ51-TP (Micro Commercial Co) is the primary component specification. This part is active, RoHS3 compliant, and maintains unlimited moisture sensitivity classification. Current inventory of 847 pieces is available.

KDZLVTFTR51 (Rohm Semiconductor) is a direct electrical equivalent. This substitute part is also active and RoHS3 compliant with unlimited MSL rating. The KDZLVTFTR51 carries AEC-Q101 automotive qualification, which provides additional assurance for applications requiring automotive-grade reliability. Higher inventory availability of 3,168 pieces supports supply chain flexibility. The packaging format difference (Cut Tape & Digi-Reel versus Tape & Reel) affects procurement and assembly handling but does not impact electrical performance or PCB integration.

Both parts are suitable for applications requiring 51 V zener regulation and overvoltage protection in the 1 W power class. Selection between them depends on packaging requirements, supply availability, and whether automotive qualification is mandated by application specifications.

Frequently Asked Questions (FAQ)

Q: Can KDZLVTFTR51 replace DFLZ51-TP in existing designs?

A: Yes. Both parts share identical zener voltage (51 V), power rating (1 W), package type (SOD-123F), and reverse leakage characteristics (5 µA). The PCB footprint and electrical performance are equivalent. The only difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel), which affects procurement and assembly processes but not circuit functionality.

Q: What is the significance of the SOD-123F package?

A: SOD-123F is a surface mount package format for small signal diodes. Both the DFLZ51-TP and KDZLVTFTR51 use this identical package, ensuring mechanical and thermal compatibility on the same PCB layout without design modifications.

Q: Does the AEC-Q101 qualification on KDZLVTFTR51 affect general-purpose applications?

A: AEC-Q101 is an automotive qualification standard that indicates enhanced reliability testing and quality assurance. For general-purpose applications, this qualification is not required but does not prevent use. For automotive or mission-critical applications, the KDZLVTFTR51 provides additional assurance of component reliability.

Q: Are there tolerance differences between these parts?

A: The DFLZ51-TP specifies ±5% zener voltage tolerance. The KDZLVTFTR51 tolerance specification is not provided in the available data. Both parts maintain the same 51 V nominal zener voltage and are suitable for applications where 51 V regulation is required.

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

A: Tape & Reel (TR) is a continuous reel format for automated assembly. Cut Tape (CT) & Digi-Reel® is a segmented tape format with optional reel packaging. Both formats contain the same components; the difference is in procurement quantity, handling, and assembly line compatibility. Selection depends on manufacturing equipment and order quantity requirements.

Q: Are both parts RoHS3 compliant?

A: Yes. Both DFLZ51-TP and KDZLVTFTR51 are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity classification, meeting environmental and regulatory requirements for commercial and industrial applications.