DL5227B-TP Equivalent & Substitute Parts

Part Overview

The DL5227B-TP is a Zener Diode rated at 3.6 V with 500 mW power dissipation in a Mini MELF surface mount package, manufactured by Micro Commercial Co. This part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity. Substitute parts maintain the core electrical specifications while offering alternative package configurations and active product status.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	3.6 V
Tolerance	±5%
Power - Max	500 mW
Impedance (Max)	24 Ohms
Current - Reverse Leakage @ Vr	15 µA @ 1 V
Voltage - Forward (Vf) (Max)	1.1 V @ 200 mA
Operating Temperature	-65°C ~ 175°C
Mounting Type	Surface Mount
Package / Case	DO-213AC, MINI-MELF, SOD-80

Substitute Part Grouping Explanation

Substitution of the DL5227B-TP is determined by electrical parameter equivalence across the following criteria:

Electrical Matching Parameters:

Zener voltage: 3.6 V nominal
Tolerance: ±5%
Maximum power dissipation: 500 mW
Maximum impedance: 24 Ohms
Reverse leakage current: 15 µA @ 1 V
Forward voltage: 1.1 V @ 200 mA
Operating temperature range: -65°C to 175°C

Package Compatibility: Substitute parts are grouped by package type. The DL5227B-TP uses Mini MELF (DO-213AC/SOD-80) packaging. Substitutes include alternative surface mount packages (SOD-123, DO-213AB, DO-213AA) that maintain electrical equivalence but differ in physical form factor and thermal characteristics.

Product Status Consideration: The main part is obsolete. Active substitute parts ensure design continuity and supply chain availability.

Parameter Comparison

Parameter	DL5227B-TP	MMSZ5227B-TP	CDLL5227B	1N5227BUR	1N5227BUR-1
Manufacturer	Micro Commercial Co	Micro Commercial Co	Microchip Technology	Microchip Technology	Microchip Technology
Voltage - Zener (Nom)	3.6 V	3.6 V	3.6 V	3.6 V	3.6 V
Tolerance	±5%	±5%	±5%	±5%	±5%
Power - Max	500 mW	500 mW	Not specified	500 mW	500 mW
Impedance (Max)	24 Ohms	24 Ohms	24 Ohms	24 Ohms	24 Ohms
Current - Reverse Leakage @ Vr	15 µA @ 1 V	15 µA @ 1 V	15 µA @ 1 V	15 µA @ 1 V	15 µA @ 1 V
Voltage - Forward (Vf) (Max)	1.1 V @ 200 mA	900 mV @ 10 mA	1.1 V @ 200 mA	1.1 V @ 200 mA	1.1 V @ 200 mA
Operating Temperature	-65°C ~ 175°C	-55°C ~ 150°C	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 175°C
Package / Case	DO-213AC, MINI-MELF, SOD-80	SOD-123	DO-213AB, MELF	DO-213AA	DO-213AA
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	Not specified	RoHS non-compliant

Engineering Selection Recommendations

Primary Substitute: MMSZ5227B-TP

MMSZ5227B-TP is the recommended substitute for new designs and production continuity. This part maintains electrical equivalence with the DL5227B-TP across all critical parameters: 3.6 V nominal zener voltage, ±5% tolerance, 500 mW power rating, 24 Ohms maximum impedance, and 15 µA reverse leakage current. The part is manufactured by Micro Commercial Co (same manufacturer as the main part), carries active product status, and is ROHS3 compliant. The SOD-123 package provides a compact surface mount alternative to the Mini MELF package. Operating temperature range is -55°C to 150°C, which is narrower than the main part but suitable for most commercial and industrial applications.

Alternative Substitute: 1N5227BUR or 1N5227BUR-1

Both 1N5227BUR and 1N5227BUR-1 are manufactured by Microchip Technology and provide full electrical equivalence to the DL5227B-TP. These parts maintain the complete operating temperature range (-65°C to 175°C), matching the main part specification. Both are rated at 3.6 V, ±5% tolerance, 500 mW power, 24 Ohms impedance, and 15 µA reverse leakage. The DO-213AA package differs from the Mini MELF but is a standard surface mount configuration. 1N5227BUR-1 carries RoHS non-compliant status; 1N5227BUR RoHS status is not specified. These parts are suitable for applications requiring extended temperature operation.

Secondary Substitute: CDLL5227B

CDLL5227B is manufactured by Microchip Technology and provides electrical equivalence in zener voltage (3.6 V), tolerance (±5%), impedance (24 Ohms), and reverse leakage (15 µA @ 1 V). The part maintains the full operating temperature range (-65°C to 175°C). Maximum power dissipation is not specified in available data. The DO-213AB MELF package is mechanically similar to the Mini MELF package of the main part. This part carries RoHS non-compliant status and is suitable for applications where RoHS compliance is not required.

Compliance Considerations:

MMSZ5227B-TP is ROHS3 compliant and recommended for applications requiring RoHS certification.
CDLL5227B and 1N5227BUR-1 are RoHS non-compliant; use in designs where RoHS compliance is mandatory is not appropriate.
All substitute parts are REACH unaffected and carry EAR99 ECCN classification.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5227B-TP be used as a direct replacement for DL5227B-TP?

A: MMSZ5227B-TP is electrically equivalent to DL5227B-TP across all critical parameters: 3.6 V zener voltage, ±5% tolerance, 500 mW power rating, 24 Ohms impedance, and 15 µA reverse leakage current. The primary difference is the package type: MMSZ5227B-TP uses SOD-123 while DL5227B-TP uses Mini MELF (DO-213AC). PCB layout and thermal management design must account for the different package footprint and thermal characteristics.

Q: What is the difference between the operating temperature ranges of the substitutes?

A: DL5227B-TP, CDLL5227B, 1N5227BUR, and 1N5227BUR-1 all operate from -65°C to 175°C. MMSZ5227B-TP operates from -55°C to 150°C, providing a narrower temperature range. For applications requiring operation below -55°C or above 150°C, MMSZ5227B-TP is not suitable; use 1N5227BUR, 1N5227BUR-1, or CDLL5227B instead.

Q: Are there RoHS compliance differences between the substitutes?

A: Yes. MMSZ5227B-TP is ROHS3 compliant. CDLL5227B and 1N5227BUR-1 are RoHS non-compliant. 1N5227BUR RoHS status is not specified. For designs requiring RoHS certification, MMSZ5227B-TP is the appropriate choice.

Q: How do the package types affect circuit design?

A: DL5227B-TP uses Mini MELF (DO-213AC/SOD-80) packaging. Substitute packages are: MMSZ5227B-TP (SOD-123), CDLL5227B (DO-213AB MELF), and 1N5227BUR/1N5227BUR-1 (DO-213AA). Each package has different footprint dimensions, lead spacing, and thermal characteristics. PCB layout, trace routing, and thermal management must be adjusted accordingly. Consult package datasheets for specific dimensional and thermal specifications.

Q: What is the significance of the forward voltage difference in MMSZ5227B-TP?

A: MMSZ5227B-TP specifies forward voltage as 900 mV @ 10 mA, while DL5227B-TP and other substitutes specify 1.1 V @ 200 mA. These measurements are taken at different current levels and therefore are not directly comparable. The forward voltage characteristic depends on the measurement conditions. For circuit design purposes, use the forward voltage specification provided in the datasheet for the specific part selected and the operating current of the application.

Q: Can I use 1N5227BUR or 1N5227BUR-1 interchangeably?

A: 1N5227BUR and 1N5227BUR-1 are electrically equivalent and use the same DO-213AA package. The primary difference is RoHS compliance status: 1N5227BUR-1 is explicitly RoHS non-compliant, while 1N5227BUR status is not specified. Both parts maintain the full -65°C to 175°C operating temperature range. Selection between these two should be based on RoHS compliance requirements of the application.

Q: Is CDLL5227B suitable for all applications where DL5227B-TP was used?

A: CDLL5227B provides electrical equivalence in zener voltage, tolerance, impedance, and reverse leakage current. Operating temperature range matches the main part (-65°C to 175°C). However, maximum power dissipation is not specified for CDLL5227B, and the part is RoHS non-compliant. Verify that the unspecified power rating meets application requirements and that RoHS non-compliance is acceptable before selection.

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