DL5245B-TP Equivalent & Substitute Parts

Part Overview

The DL5245B-TP is a Zener diode rated at 15 V nominal voltage with 500 mW maximum power dissipation, manufactured by Micro Commercial Co. This component is packaged in the Mini MELF (DO-213AC, SOD-80) surface mount configuration. The part is currently listed as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement requirements. Substitute parts must maintain electrical performance specifications while accommodating potential package and thermal operating range variations.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	15	V
Tolerance	±5	%
Power - Max	500	mW
Impedance (Max)	16	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 11 V
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the DL5245B-TP is determined by the following critical electrical parameters:

Zener Voltage (Vz): 15 V nominal with ±5% tolerance
Power Dissipation: 500 mW maximum
Impedance: 16 Ohms maximum
Reverse Leakage Current: 100 nA @ 11 V
Surface Mount Configuration: Required for PCB compatibility
Regulatory Compliance: ROHS3 Compliant, REACH Unaffected

The MMSZ5245B-TP qualifies as a direct electrical substitute, matching all core electrical specifications. The primary distinction lies in package format: the substitute uses SOD-123 surface mount packaging instead of Mini MELF. Both packages are surface mount configurations suitable for automated assembly. Operating temperature range and forward voltage characteristics differ between the two parts but do not affect substitution eligibility when the application thermal environment and forward current requirements are within the substitute's rated specifications.

Parameter Comparison

Parameter	DL5245B-TP (Main)	MMSZ5245B-TP (Substitute)	Match Status
Manufacturer	Micro Commercial Co	Micro Commercial Co	Identical
Category	Diodes, Zener	Diodes, Zener	Identical
Voltage - Zener (Nom)	15 V	15 V	Identical
Tolerance	±5%	±5%	Identical
Power - Max	500 mW	500 mW	Identical
Impedance (Max)	16 Ohms	16 Ohms	Identical
Current - Reverse Leakage @ Vr	100 nA @ 11 V	100 nA @ 11 V	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
Package / Case	DO-213AC, MINI-MELF, SOD-80	SOD-123	Different
Operating Temperature	-65°C ~ 175°C	-55°C ~ 150°C	Substitute Range Narrower
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA	900 mV @ 10 mA	Different Test Conditions
Product Status	Obsolete	Active	Substitute Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Identical

Engineering Selection Recommendations

The MMSZ5245B-TP is electrically equivalent to the DL5245B-TP across all specified Zener diode performance parameters. Selection between these parts is determined by the following factors:

Package Compatibility: The DL5245B-TP uses Mini MELF (DO-213AC) packaging, while the MMSZ5245B-TP uses SOD-123 packaging. PCB layout and footprint design must accommodate the selected package geometry. Both are surface mount configurations suitable for automated assembly processes.

Operating Temperature Range: The DL5245B-TP operates from -65°C to 175°C, while the MMSZ5245B-TP operates from -55°C to 150°C. Applications requiring operation below -55°C or above 150°C must use the DL5245B-TP if available, or confirm that the MMSZ5245B-TP's narrower range satisfies the actual application environment.

Product Status and Availability: The DL5245B-TP is obsolete. The MMSZ5245B-TP is active with higher inventory availability (9300 pcs vs. 2900 pcs), making it the preferred choice for new designs and ongoing procurement.

Regulatory Compliance: Both parts are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the MMSZ5245B-TP directly replace the DL5245B-TP in existing designs?

A: Electrical substitution is valid. Physical substitution requires PCB redesign to accommodate the SOD-123 package footprint instead of Mini MELF. Verify that the application's operating temperature range does not exceed -55°C to 150°C.

Q: What is the primary difference between these two parts?

A: The primary difference is package format. The DL5245B-TP uses Mini MELF (DO-213AC) surface mount packaging, while the MMSZ5245B-TP uses SOD-123 surface mount packaging. All electrical specifications for Zener voltage, power rating, impedance, and reverse leakage current are identical.

Q: Are there any thermal considerations when substituting?

A: The MMSZ5245B-TP has a narrower operating temperature range (-55°C to 150°C) compared to the DL5245B-TP (-65°C to 175°C). Confirm that the application environment remains within the substitute's rated range. Both parts have identical maximum power dissipation (500 mW).

Q: Do both parts meet current regulatory requirements?

A: Yes. Both the DL5245B-TP and MMSZ5245B-TP are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory standards.

Q: Which part should be selected for new designs?

A: The MMSZ5245B-TP is recommended for new designs. It is active in production with higher inventory availability and meets all electrical specifications. The DL5245B-TP is obsolete and should be used only when Mini MELF packaging is a mandatory design requirement.

Q: Are the forward voltage characteristics identical?

A: Forward voltage is specified under different test conditions. The DL5245B-TP specifies 1.1 V @ 200 mA, while the MMSZ5245B-TP specifies 900 mV @ 10 mA. These measurements are not directly comparable due to different test currents. Both parts meet the 15 V Zener specification and 500 mW power rating.

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