DL5244B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The DL5244B-TP is a 14 V, 500 mW Zener diode manufactured by Micro Commercial Co in a Mini MELF surface mount package. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and production continuity. Substitute parts must maintain electrical performance specifications while accommodating alternative package configurations and current product availability.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	14 V
Tolerance	±5%
Power - Max	500 mW
Impedance (Max)	15 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 10 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA
Operating Temperature Range	-65°C ~ 175°C
Mounting Type	Surface Mount
Package / Case	DO-213AC, MINI-MELF, SOD-80
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the DL5244B-TP is determined by the following core electrical and mechanical parameters:

Primary Matching Criteria:

Voltage - Zener (Nom): 14 V
Tolerance: ±5%
Power - Max: 500 mW
Impedance (Max): 15 Ohms
Current - Reverse Leakage @ Vr: 100 nA
Mounting Type: Surface Mount

Secondary Compatibility Factors:

Operating Temperature Range (minimum -65°C to 175°C required for full compatibility)
Package / Case (alternative surface mount packages acceptable with PCB layout modification)
RoHS Compliance Status

The identified substitute parts maintain all primary electrical specifications. Variations in package configuration and operating temperature range are noted for design consideration.

Parameter Comparison

Parameter	DL5244B-TP	MMSZ5244B-TP	1N5244BUR-1
Manufacturer	Micro Commercial Co	Micro Commercial Co	Microchip Technology
Voltage - Zener (Nom)	14 V	14 V	14 V
Tolerance	±5%	±5%	±5%
Power - Max	500 mW	500 mW	500 mW
Impedance (Max)	15 Ohms	15 Ohms	15 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 10 V	100 nA @ 10.5 V	100 nA @ 10 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA	Not specified	1.1 V @ 200 mA
Operating Temperature Range	-65°C ~ 175°C	-55°C ~ 150°C	-65°C ~ 175°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	DO-213AC, MINI-MELF, SOD-80	SOD-123	DO-213AA
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant

Engineering Selection Recommendations

MMSZ5244B-TP (Micro Commercial Co)

This substitute maintains ROHS3 compliance and active product status. All primary electrical specifications match the DL5244B-TP. The operating temperature range is reduced to -55°C ~ 150°C, which narrows the upper temperature limit by 25°C. The SOD-123 package requires PCB layout modification compared to the Mini MELF package. This option is suitable for applications operating within the -55°C to 150°C range.

1N5244BUR-1 (Microchip Technology)

This substitute maintains the full operating temperature range (-65°C ~ 175°C) and forward voltage specification of the original part. The DO-213AA package is mechanically similar to the Mini MELF configuration. However, this part carries RoHS non-compliant status, which may restrict use in applications requiring RoHS compliance. This option is suitable for applications with no RoHS compliance requirement and requiring the full temperature operating range.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5244B-TP be used as a direct replacement for DL5244B-TP?

A: MMSZ5244B-TP matches all primary electrical specifications (14 V nominal, 500 mW, ±5% tolerance, 15 Ohms impedance). The operating temperature range is reduced from -65°C ~ 175°C to -55°C ~ 150°C. PCB layout modification is required due to the SOD-123 package versus Mini MELF. Substitution is valid for applications operating within -55°C to 150°C.

Q: What are the package differences between the substitute parts?

A: DL5244B-TP uses DO-213AC/MINI-MELF/SOD-80 package. MMSZ5244B-TP uses SOD-123 package. 1N5244BUR-1 uses DO-213AA package. All are surface mount configurations. PCB footprint and land pattern modifications are required when switching between these packages.

Q: Does 1N5244BUR-1 have any compliance limitations?

A: 1N5244BUR-1 is RoHS non-compliant, whereas DL5244B-TP and MMSZ5244B-TP are ROHS3 compliant. Applications requiring RoHS compliance must use MMSZ5244B-TP or equivalent compliant alternatives.

Q: What is the temperature operating range difference between substitutes?

A: DL5244B-TP and 1N5244BUR-1 both operate from -65°C to 175°C. MMSZ5244B-TP operates from -55°C to 150°C, representing a 10°C lower minimum and 25°C lower maximum. Design applications requiring full -65°C to 175°C range must use 1N5244BUR-1 or the original part.

Q: Are the reverse leakage current specifications identical?

A: DL5244B-TP and 1N5244BUR-1 specify 100 nA @ 10 V. MMSZ5244B-TP specifies 100 nA @ 10.5 V. The leakage current magnitude is equivalent; the measurement voltage differs by 0.5 V.

Q: Which substitute offers the best compatibility with the original design?

A: 1N5244BUR-1 maintains identical operating temperature range and forward voltage specifications. However, RoHS compliance status differs. MMSZ5244B-TP maintains RoHS3 compliance but with reduced temperature range. Selection depends on application temperature requirements and compliance mandates.

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