DL5263B-TP Zener Diode 56V 500mW Equivalent & Substitute Parts

Part Overview

The DL5263B-TP is a 56V 500mW Zener diode manufactured by Micro Commercial Co in Mini MELF (DO-213AC/SOD-80) surface mount package. This component is classified as obsolete product status. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications requiring 56V Zener regulation at 500mW power dissipation.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	56	V
Tolerance	±5%	-
Power - Max	500	mW
Impedance (Max)	150	Ohms
Current - Reverse Leakage @ Vr	100 nA @ 43 V	-
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA	-
Operating Temperature	-65°C to 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 DL5263B-TP is determined by the following core parameters:

Primary Matching Criteria:

Zener voltage: 56V nominal
Power rating: 500mW maximum
Mounting type: Surface Mount
Package compatibility: DO-213AC/MINI-MELF/SOD-80 family

Secondary Compatibility Factors:

Voltage tolerance (±5% or tighter acceptable)
Impedance maximum (150 Ohms or lower acceptable)
Reverse leakage current specifications
Forward voltage characteristics
Operating temperature range (-65°C to 175°C minimum required)
RoHS3 compliance status

Substitute parts are grouped into two categories: Direct Package Equivalents (same DO-213AC Mini MELF package) and Alternative Package Equivalents (different surface mount packages with identical electrical specifications).

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Zzt (Max)	Vf @ 200mA	Temp Range	Package	Status	RoHS
DL5263B-TP	Micro Commercial Co	56V	±5%	500mW	150Ω	1.1V	-65 to 175°C	DO-213AC	Obsolete	ROHS3
MMSZ5263B-TP	Micro Commercial Co	56V	±5%	500mW	150Ω	-	-55 to 150°C	SOD-123	Active	ROHS3
1N5263BUR-1	Microchip Technology	56V	±5%	500mW	150Ω	1.1V	-65 to 175°C	DO-213AA	Active	Non-compliant
TLZ56-GS08	Vishay	56V	-	500mW	100Ω	1.5V	-65 to 175°C	SOD-80	Active	ROHS3
TLZ56-GS18	Vishay	56V	-	500mW	100Ω	1.5V	-65 to 175°C	SOD-80	Active	ROHS3
TZMB56-GS08	Vishay	56V	±2%	500mW	135Ω	1.5V	-65 to 175°C	SOD-80	Active	ROHS3
TZMB56-GS18	Vishay	56V	±2%	500mW	135Ω	1.5V	-65 to 175°C	SOD-80	Active	ROHS3
TZMC56-GS08	Vishay	56V	±5%	500mW	135Ω	1.5V	-65 to 175°C	SOD-80	Active	ROHS3
TZMC56-GS18	Vishay	56V	±5%	500mW	135Ω	1.5V	-65 to 175°C	SOD-80	Active	ROHS3
TZMC56-M-08	Vishay	56V	±5%	500mW	135Ω	1.5V	-65 to 175°C	SOD-80	Active	ROHS3
TZMC56-M-18	Vishay	56V	±5%	500mW	135Ω	1.5V	-65 to 175°C	SOD-80	Active	ROHS3

Engineering Selection Recommendations

Primary Recommendation - Same Manufacturer: MMSZ5263B-TP (Micro Commercial Co) provides direct manufacturer continuity with identical electrical specifications and RoHS3 compliance. Operating temperature range is reduced to -55°C to 150°C; verify application requirements before selection. Package change from DO-213AC to SOD-123 requires PCB layout modification.

Secondary Recommendation - Active Status with Extended Temperature: Vishay TZMB56-GS08, TZMB56-GS18, TZMC56-GS08, TZMC56-GS18, TZMC56-M-08, and TZMC56-M-18 maintain full -65°C to 175°C operating range with RoHS3 compliance. All feature SOD-80 Mini MELF package (compatible with original DO-213AC footprint). TZMB series offers ±2% tolerance; TZMC series offers ±5% tolerance matching original specification. Automotive-grade qualification (AEC-Q101) available in TZMB and TZMC series.

Alternative - Microchip Technology: 1N5263BUR-1 provides identical electrical performance and temperature range but is RoHS non-compliant. Package is DO-213AA (compatible with DO-213AC footprint). Selection requires RoHS compliance verification for end application.

Not Recommended: TLZ56-GS08 and TLZ56-GS18 feature lower impedance (100Ω vs. 150Ω) and higher forward voltage (1.5V vs. 1.1V), introducing circuit behavior differences. Selection requires circuit simulation and validation.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5263B-TP replace DL5263B-TP directly? A: Electrically yes, with identical 56V/500mW specifications and ±5% tolerance. Package differs: MMSZ5263B-TP uses SOD-123 versus DL5263B-TP DO-213AC Mini MELF. PCB footprint redesign required. Operating temperature range is narrower (-55°C to 150°C vs. -65°C to 175°C).

Q: What is the difference between Vishay TLZ, TZMB, and TZMC series? A: All three series provide 56V/500mW in SOD-80 Mini MELF package. TLZ series has no specified tolerance and 100Ω impedance. TZMB series specifies ±2% tolerance with 135Ω impedance and AEC-Q101 automotive qualification. TZMC series specifies ±5% tolerance with 135Ω impedance and AEC-Q101 automotive qualification. TZMC matches original ±5% tolerance specification.

Q: Is 1N5263BUR-1 suitable for new designs? A: 1N5263BUR-1 meets electrical specifications and temperature range but is RoHS non-compliant. Suitable only for applications without RoHS requirements. Verify regulatory compliance for target market before selection.

Q: Do package differences affect circuit performance? A: Package differences (DO-213AC vs. SOD-123 vs. DO-213AA vs. SOD-80) affect PCB layout, thermal dissipation characteristics, and assembly compatibility. Electrical performance remains equivalent when specifications match. Thermal design review required for high-power applications.

Q: Which substitute offers best long-term availability? A: Vishay TZMC56-GS08 and TZMC56-GS18 show highest inventory levels (135,150 and 696 units respectively) with active product status. These parts provide ±5% tolerance matching original specification, full temperature range, RoHS3 compliance, and automotive qualification.

Q: Can I use automotive-grade parts (TZMB, TZMC) in non-automotive applications? A: Yes. Automotive-grade components meet or exceed commercial specifications. AEC-Q101 qualification indicates enhanced reliability and stricter manufacturing controls. No technical restriction prevents use in non-automotive applications.

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