DL5225B-TP Equivalent & Substitute Parts

Part Overview

The DL5225B-TP is a 3 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 equivalence across voltage regulation, power dissipation, and thermal operating characteristics while accommodating alternative package formats.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	3 V
Tolerance	±5%
Power - Max	500 mW
Impedance (Max)	29 Ohms
Current - Reverse Leakage @ Vr	50 µA @ 1 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
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the DL5225B-TP are selected based on the following electrical and mechanical criteria:

Primary Equivalence Parameters:

Zener voltage: 3 V nominal
Power dissipation: 500 mW maximum
Surface mount technology
Operating temperature range: -65°C to 175°C minimum

Substitution Categories:

Category 1: Package Format Variation (SOD-123) The MMSZ5225B-TP maintains identical electrical specifications (3 V, 500 mW, ±5% tolerance) but uses SOD-123 packaging instead of Mini MELF. This substitute is suitable for designs where package footprint compatibility permits SOD-123 integration.

Category 2: Mini MELF Package with Impedance Variation (Vishay TLZ Series) The TLZ3V0-GS08, TLZ3V0-GS18, TLZ3V0A-GS08, TLZ3V0A-GS18, TLZ3V0B-GS08, and TLZ3V0B-GS18 maintain the Mini MELF package format and 3 V, 500 mW electrical core specifications. These parts exhibit higher impedance (80 Ohms maximum) compared to the DL5225B-TP (29 Ohms maximum). Reverse leakage current varies: standard TLZ variants specify 50 µA @ 1 V, while TLZ3V0B variants specify 10 µA @ 1 V.

Category 3: Mini MELF Package with Enhanced Specifications (Vishay TZM Series) The TZMB3V0-GS08, TZMB3V0-GS18, TZMC3V0-GS08, and TZMC3V0-M variants provide Mini MELF packaging with improved tolerance (±2% for TZMB series versus ±5% for DL5225B-TP) and reduced reverse leakage (4 µA @ 1 V). These parts carry automotive qualification (AEC-Q101) and are suitable for applications requiring enhanced reliability and tighter voltage regulation.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Ir @ Vr	Vf (Max) @ If	Temp Range	Package	Status
DL5225B-TP	Micro Commercial Co	3 V	±5%	500 mW	29 Ω	50 µA @ 1 V	1.1 V @ 200 mA	-65°C ~ 175°C	Mini MELF	Obsolete
MMSZ5225B-TP	Micro Commercial Co	3 V	±5%	500 mW	29 Ω	50 µA @ 1 V	900 mV @ 10 mA	-55°C ~ 150°C	SOD-123	Active
TLZ3V0-GS08	Vishay	3 V	—	500 mW	80 Ω	—	1.5 V @ 200 mA	-65°C ~ 175°C	Mini MELF	Active
TLZ3V0-GS18	Vishay	3 V	—	500 mW	80 Ω	—	1.5 V @ 200 mA	-65°C ~ 175°C	Mini MELF	Active
TLZ3V0A-GS08	Vishay	3 V	—	500 mW	80 Ω	50 µA @ 1 V	1.5 V @ 200 mA	-65°C ~ 175°C	Mini MELF	Active
TLZ3V0A-GS18	Vishay	3 V	—	500 mW	80 Ω	50 µA @ 1 V	1.5 V @ 200 mA	-65°C ~ 175°C	Mini MELF	Active
TLZ3V0B-GS08	Vishay	3 V	—	500 mW	80 Ω	10 µA @ 1 V	1.5 V @ 200 mA	-65°C ~ 175°C	Mini MELF	Active
TLZ3V0B-GS18	Vishay	3 V	—	500 mW	80 Ω	10 µA @ 1 V	1.5 V @ 200 mA	-65°C ~ 175°C	Mini MELF	Active
TZMB3V0-GS08	Vishay	3 V	±2%	500 mW	90 Ω	4 µA @ 1 V	1.5 V @ 200 mA	-65°C ~ 175°C	Mini MELF	Active
TZMB3V0-GS18	Vishay	3 V	±2%	500 mW	90 Ω	4 µA @ 1 V	1.5 V @ 200 mA	-65°C ~ 175°C	Mini MELF	Active
TZMC3V0-GS08	Vishay	3 V	±5%	500 mW	90 Ω	4 µA @ 1 V	1.5 V @ 200 mA	-65°C ~ 175°C	Mini MELF	Active

Engineering Selection Recommendations

For Direct Package Compatibility (Mini MELF): The Vishay TLZ and TZM series parts maintain the Mini MELF package format of the DL5225B-TP. Among these options, the TZMC3V0-GS08 provides the closest electrical match with ±5% tolerance matching the original specification, while offering active product status and ROHS3 compliance. The TZMB3V0-GS08 and TZMB3V0-GS18 variants provide enhanced tolerance (±2%) and automotive qualification (AEC-Q101) for applications requiring higher reliability standards.

For Alternative Package Format (SOD-123): The MMSZ5225B-TP offers identical electrical specifications (3 V, 500 mW, ±5% tolerance) with active product status. This substitute is applicable only when PCB layout and assembly processes accommodate SOD-123 package dimensions. Note that the operating temperature range is reduced to -55°C ~ 150°C compared to the DL5225B-TP specification of -65°C ~ 175°C.

Compliance Considerations: All substitute parts listed maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status, matching the environmental and regulatory profile of the DL5225B-TP. The Vishay TZM series parts carry AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade component certification.

Frequently Asked Questions (FAQ)

Q: Can the MMSZ5225B-TP replace the DL5225B-TP in all applications?

A: The MMSZ5225B-TP maintains electrical equivalence (3 V, 500 mW, ±5% tolerance) but uses SOD-123 packaging instead of Mini MELF. Substitution is valid only when the PCB footprint and assembly process support SOD-123 format. Additionally, the operating temperature range is reduced from -65°C ~ 175°C to -55°C ~ 150°C, which may limit use in extreme temperature environments.

Q: What is the difference between the Vishay TLZ and TZM series substitutes?

A: Both series maintain the Mini MELF package and 3 V, 500 mW specifications. The TLZ series exhibits 80 Ohms maximum impedance, while the TZM series exhibits 90 Ohms maximum impedance. The TZM series provides lower reverse leakage current (4 µA @ 1 V) compared to standard TLZ variants (50 µA @ 1 V for TLZ3V0A). The TZMB variant of the TZM series offers ±2% tolerance and AEC-Q101 automotive qualification.

Q: Which substitute part offers the tightest voltage tolerance?

A: The TZMB3V0-GS08 and TZMB3V0-GS18 provide ±2% tolerance, compared to the DL5225B-TP specification of ±5%. These parts are suitable for applications requiring enhanced voltage regulation precision and carry AEC-Q101 automotive qualification.

Q: Are all substitute parts RoHS compliant?

A: Yes, all substitute parts listed (MMSZ5225B-TP, TLZ series, and TZM series) are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching the environmental compliance profile of the DL5225B-TP.

Q: What is the impact of impedance variation on circuit performance?

A: The DL5225B-TP specifies 29 Ohms maximum impedance, while Vishay TLZ series substitutes specify 80 Ohms and TZM series specify 90 Ohms. Higher impedance results in increased dynamic resistance, which affects voltage regulation under transient load conditions. Applications with stringent transient response requirements should account for this parameter difference during circuit validation.

Q: Can the TLZ3V0B variants be used interchangeably with TLZ3V0A variants?

A: Both variants maintain identical electrical specifications (3 V, 500 mW, Mini MELF package, -65°C ~ 175°C operating range) with the primary difference being reverse leakage current: TLZ3V0A specifies 50 µA @ 1 V, while TLZ3V0B specifies 10 µA @ 1 V. Interchangeability depends on circuit requirements for leakage current performance. Applications sensitive to standby power consumption benefit from the lower leakage TLZ3V0B variant.

Q: What packaging options are available for the 3 V, 500 mW Zener diode substitutes?

A: Active substitute parts are available in two package formats: Mini MELF (DO-213AC, SOD-80) and SOD-123. The Mini MELF format is maintained by the Vishay TLZ and TZM series, while the SOD-123 format is provided by the MMSZ5225B-TP. Package selection depends on PCB layout constraints and assembly process compatibility.

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