DL5267B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The DL5267B-TP is a 75 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 active equivalent parts for new designs and ongoing production requirements. The diode is ROHS3 compliant with unlimited moisture sensitivity rating and operates across a temperature range of -65°C to 175°C.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	75 V
Tolerance	±5%
Power - Max	500 mW
Impedance (Max)	270 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 56 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA
Operating Temperature	-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

Substitution of the DL5267B-TP is determined by electrical parameter equivalence and package compatibility. The critical parameters for substitution are:

Zener voltage: 75 V nominal
Power dissipation: 500 mW maximum
Tolerance: ±5%
Impedance: 270 Ohms maximum
Reverse leakage current: 100 nA @ 56 V
Forward voltage: 1.1 V @ 200 mA
Operating temperature range: -65°C to 175°C minimum
Surface mount configuration

Substitute parts are grouped into two categories based on package type:

Category 1: Mini MELF / SOD-80 Package - Direct mechanical and electrical equivalents maintaining the original package footprint. These parts preserve PCB layout compatibility.

Category 2: SOD-123 Package - Electrical equivalents with different surface mount package geometry. These require PCB redesign but maintain all electrical specifications.

Parameter Comparison

Parameter	DL5267B-TP	MMSZ5267B-TP	1N5267BUR-1	TZM5267B-GS18	TZMC75-GS08	TZMC75-GS18
Manufacturer	Micro Commercial Co	Micro Commercial Co	Microchip Technology	Vishay	Vishay	Vishay
Voltage - Zener (Nom)	75 V	75 V	75 V	75 V	75 V	75 V
Tolerance	±5%	±5%	±5%	±5%	±5%	±5%
Power - Max	500 mW	500 mW	500 mW	500 mW	500 mW	500 mW
Impedance (Max)	270 Ohms	270 Ohms	270 Ohms	270 Ohms	250 Ohms	250 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 56 V	100 nA @ 56 V	100 nA @ 56 V	100 nA @ 56 V	100 nA @ 56 V	100 nA @ 56 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA	Not specified	1.1 V @ 200 mA	1.1 V @ 200 mA	1.5 V @ 200 mA	1.5 V @ 200 mA
Operating Temperature	-65°C ~ 175°C	-55°C ~ 150°C	-65°C ~ 175°C	Up to 175°C	-65°C ~ 175°C	-65°C ~ 175°C
Package / Case	DO-213AC, MINI-MELF, SOD-80	SOD-123	DO-213AA	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80	DO-213AC, MINI-MELF, SOD-80
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For direct package compatibility (Mini MELF / SOD-80):

The TZM5267B-GS18 and TZMC75-GS08 / TZMC75-GS18 are active equivalents that maintain the original Mini MELF package footprint. Both are ROHS3 compliant. The TZMC75 series carries AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade reliability. The TZM5267B-GS18 provides standard industrial-grade performance. All three maintain the -65°C to 175°C operating temperature range of the original part.

For alternative package (SOD-123):

The MMSZ5267B-TP offers electrical equivalence in a smaller SOD-123 package. This part is ROHS3 compliant and active. The operating temperature range is reduced to -55°C to 150°C, which may limit use in extended temperature applications. PCB layout modification is required for this substitution.

For legacy compatibility (DO-213AA):

The 1N5267BUR-1 from Microchip Technology maintains the original electrical specifications and operating temperature range but is RoHS non-compliant. This part is suitable only for applications where RoHS compliance is not required.

Compliance considerations:

For new designs requiring ROHS3 compliance, select from TZM5267B-GS18, TZMC75-GS08, TZMC75-GS18, or MMSZ5267B-TP. The 1N5267BUR-1 does not meet current RoHS requirements.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5267B-TP replace DL5267B-TP directly on the PCB?

A: No. The MMSZ5267B-TP uses SOD-123 package while the DL5267B-TP uses Mini MELF (SOD-80). The footprints are different and require PCB redesign. For direct PCB compatibility without layout changes, use TZM5267B-GS18, TZMC75-GS08, or TZMC75-GS18.

Q: What is the difference between TZM5267B-GS18 and TZMC75-GS08?

A: Both are Mini MELF package Zener diodes with 75 V, 500 mW specifications. The TZMC75 series carries AEC-Q101 automotive qualification and has impedance of 250 Ohms maximum versus 270 Ohms for TZM5267B. The TZMC75 forward voltage is 1.5 V @ 200 mA versus 1.1 V for TZM5267B. Select TZMC75 for automotive applications; select TZM5267B for standard industrial use.

Q: Is the operating temperature range critical for substitution?

A: Yes. The original DL5267B-TP operates from -65°C to 175°C. The MMSZ5267B-TP operates from -55°C to 150°C, a narrower range. If your application requires the full -65°C to 175°C range, use TZM5267B-GS18, TZMC75-GS08, TZMC75-GS18, or 1N5267BUR-1 instead.

Q: Why is 1N5267BUR-1 listed if it is RoHS non-compliant?

A: The 1N5267BUR-1 is included as a technical equivalent for legacy systems or applications where RoHS compliance is not mandated. For new designs, ROHS3-compliant alternatives are preferred.

Q: Can I use TZMC75-GS08 in a non-automotive application?

A: Yes. The TZMC75-GS08 is AEC-Q101 qualified, meaning it exceeds standard industrial requirements. It is suitable for any application requiring 75 V, 500 mW Zener performance in Mini MELF package.

Q: What does impedance (Zzt) affect in circuit performance?

A: Impedance affects the dynamic resistance of the Zener diode at the operating point. Lower impedance provides better voltage regulation. The TZMC75 series (250 Ohms max) provides slightly better regulation than DL5267B-TP (270 Ohms max), though both are within acceptable ranges for most applications.

Q: Are all substitute parts available in the same packaging options?

A: No. DL5267B-TP, TZM5267B-GS18, TZMC75-GS08, and TZMC75-GS18 are all Mini MELF package. MMSZ5267B-TP is SOD-123 package. 1N5267BUR-1 is DO-213AA package. Verify package compatibility with your PCB design before selection.

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