DL5228B-TP Equivalent & Substitute Parts

Part Overview

The DL5228B-TP is a Zener diode rated at 3.9 V with 500 mW power dissipation in a Mini MELF surface mount package. Manufactured by Micro Commercial Co, this component is classified as obsolete. Due to its obsolete status and limited availability relative to active alternatives, identifying equivalent substitute parts is necessary for ongoing design support and production continuity. Substitute parts maintain the core electrical specifications while offering different package configurations and active product status.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	3.9	V
Tolerance	±5%	%
Power - Max	500	mW
Impedance (Max)	23	Ohms
Current - Reverse Leakage @ Vr	10	µA @ 1 V
Operating Temperature Range	-65°C ~ 175°C	°C
Mounting Type	Surface Mount	—
Package / Case	DO-213AC, MINI-MELF, SOD-80	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the DL5228B-TP are selected based on matching the following critical electrical parameters:

Zener voltage: 3.9 V nominal
Tolerance: ±5%
Power rating: 500 mW
Impedance (Max): 23 Ohms
Reverse leakage current: 10 µA @ 1 V
Surface mount technology

The two identified substitutes differ in package configuration and product status. The MMSZ5228B-TP uses SOD-123 packaging with active product status. The CDLL5228B uses DO-213AB packaging and is manufactured by Microchip Technology. Both maintain electrical equivalence to the main part while offering different mechanical form factors and availability profiles.

Parameter Comparison

Parameter	DL5228B-TP	MMSZ5228B-TP	CDLL5228B
Manufacturer	Micro Commercial Co	Micro Commercial Co	Microchip Technology
Voltage - Zener (Nom)	3.9 V	3.9 V	3.9 V
Tolerance	±5%	±5%	±5%
Power - Max	500 mW	500 mW	500 mW
Impedance (Max)	23 Ohms	23 Ohms	23 Ohms
Current - Reverse Leakage @ Vr	10 µA @ 1 V	10 µA @ 1 V	10 µA @ 1 V
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-213AB, MELF
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant

Engineering Selection Recommendations

MMSZ5228B-TP is the primary substitute for new designs and production. This part maintains all electrical specifications of the DL5228B-TP, carries active product status, and is ROHS3 compliant. The SOD-123 package is widely supported in modern PCB design tools and manufacturing processes. This part is available in higher inventory quantities (3957 pcs) compared to the obsolete main part.

CDLL5228B is an alternative substitute when DO-213AB/MELF package compatibility is required. Manufactured by Microchip Technology, this part matches the operating temperature range and forward voltage characteristics of the DL5228B-TP. However, this part is RoHS non-compliant and should be evaluated against project compliance requirements before selection.

For applications where the original Mini MELF package form factor is critical and cannot be redesigned, neither substitute provides an exact package match. In such cases, design revision or direct sourcing of remaining DL5228B-TP inventory may be necessary.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5228B-TP directly replace DL5228B-TP in existing designs?

A: Electrical substitution is valid. The MMSZ5228B-TP maintains identical Zener voltage, tolerance, power rating, impedance, and reverse leakage specifications. PCB layout modification is required due to package change from Mini MELF to SOD-123. Verify PCB footprint compatibility before implementation.

Q: What is the operating temperature difference between DL5228B-TP and MMSZ5228B-TP?

A: DL5228B-TP operates from -65°C to 175°C. MMSZ5228B-TP operates from -55°C to 150°C. For applications requiring the full -65°C to 175°C range, MMSZ5228B-TP may not be suitable. CDLL5228B maintains the full temperature range of the original part.

Q: What is the difference between forward voltage specifications?

A: DL5228B-TP and CDLL5228B specify 1.1 V @ 200 mA. MMSZ5228B-TP specifies 900 mV @ 10 mA. These measurements are taken at different current levels and do not indicate incompatibility. Forward voltage characteristics remain within acceptable ranges for Zener diode applications.

Q: Is CDLL5228B suitable for RoHS-compliant applications?

A: No. CDLL5228B is RoHS non-compliant. For RoHS-compliant designs, use MMSZ5228B-TP, which carries ROHS3 compliance certification.

Q: What packaging considerations apply to each substitute?

A: DL5228B-TP uses Mini MELF (DO-213AC/SOD-80). MMSZ5228B-TP uses SOD-123, a smaller package with different lead spacing. CDLL5228B uses DO-213AB/MELF, similar in size to Mini MELF but with different lead configuration. PCB redesign is required for any package transition.

Q: Are all three parts available in the same packaging format?

A: No. Each part uses a different package. DL5228B-TP (Mini MELF), MMSZ5228B-TP (SOD-123), and CDLL5228B (DO-213AB/MELF) require separate PCB footprints. Package selection depends on available PCB space and manufacturing capabilities.

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