DL5261B-TP Equivalent & Substitute Parts

Part Overview

The DL5261B-TP is a Zener diode rated at 47 V, 500 mW, manufactured by Micro Commercial Co in a Mini MELF surface mount package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. The part maintains RoHS3 compliance and operates across a temperature range of -65°C to 175°C. Equivalent alternatives are available from multiple manufacturers with comparable electrical specifications and surface mount packaging options.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	47	V
Tolerance	±5%	-
Power - Maximum	500	mW
Impedance (Maximum)	105	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 36 V
Voltage - Forward (Maximum) @ If	1.1	V @ 200 mA
Operating Temperature Range	-65 to 175	°C
Mounting Type	Surface Mount	-
Package / Case	DO-213AC, MINI-MELF, SOD-80	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the DL5261B-TP is determined by strict equivalence of the following electrical and mechanical parameters:

Critical Substitution Parameters:

Zener voltage: 47 V nominal
Power dissipation: 500 mW maximum
Voltage tolerance: ±5%
Impedance: 105 Ohms maximum
Reverse leakage current: 100 nA @ 36 V
Forward voltage: 1.1 V @ 200 mA
Operating temperature range: -65°C to 175°C minimum
Surface mount packaging: DO-213AC, MINI-MELF, or SOD-80 compatible

Substitute parts are grouped into the following categories:

Direct Electrical Equivalents (Same Package Family): Parts maintaining identical electrical specifications and Mini MELF/SOD-80 packaging from active manufacturers.

Package Variant Equivalents (Different Surface Mount Package): Parts with identical electrical specifications but alternative surface mount packages (SOD-123, DO-213AB, DO-213AA) suitable for different PCB layouts.

Parametric Equivalents (Minor Specification Variance): Parts with equivalent electrical performance but minor variations in impedance or forward voltage that remain within acceptable design tolerances.

Automotive Grade Equivalents: Parts meeting AEC-Q101 qualification with identical electrical specifications for applications requiring automotive-grade components.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Ir @ Vr (nA)	Vf @ If (V)	Temp Range (°C)	Package	Product Status	RoHS
DL5261B-TP	Micro Commercial Co	47	±5%	500	105	100 @ 36V	1.1 @ 200mA	-65 to 175	Mini MELF	Obsolete	ROHS3
MMSZ5261B-TP	Micro Commercial Co	47	±5%	500	105	100 @ 36V	-	-55 to 150	SOD-123	Active	ROHS3
CDLL5261B	Microchip Technology	47	±5%	-	105	100 @ 36V	1.1 @ 200mA	-65 to 175	DO-213AB	Active	Non-compliant
1N5261BUR-1	Microchip Technology	47	±5%	500	105	100 @ 36V	1.1 @ 200mA	-65 to 175	DO-213AA	Active	Non-compliant
CLL5261B TR TIN/LEAD	Central Semiconductor Corp	47	±5%	500	105	100 @ 36V	1.25 @ 200mA	-65 to 200	SOD-80	Active	Non-compliant
TLZ47-GS08	Vishay General Semiconductor	47	-	500	90	40 @ 41.8V	1.5 @ 200mA	-65 to 175	SOD-80	Active	ROHS3
TLZ47-GS18	Vishay General Semiconductor	47	-	500	90	40 @ 41.8V	1.5 @ 200mA	-65 to 175	SOD-80	Active	ROHS3
TZMC47-M-08	Vishay General Semiconductor	47	±5%	500	110	100 @ 36V	1.5 @ 200mA	-65 to 175	SOD-80	Active	ROHS3
TZMC47-M-18	Vishay General Semiconductor	47	±5%	500	110	100 @ 36V	1.5 @ 200mA	-65 to 175	SOD-80	Active	ROHS3
TZM5261B-GS08	Vishay General Semiconductor	47	±5%	500	105	100 @ 36V	1.1 @ 200mA	-65 to 175	SOD-80	Active	ROHS3
TZM5261B-GS18	Vishay General Semiconductor	47	±5%	500	105	100 @ 36V	1.1 @ 200mA	-65 to 175	SOD-80	Active	ROHS3

Engineering Selection Recommendations

Primary Recommendation - Full Electrical and Compliance Match:

The TZM5261B-GS08 and TZM5261B-GS18 from Vishay General Semiconductor provide complete electrical equivalence to the DL5261B-TP with identical specifications across all critical parameters: 47 V zener voltage, ±5% tolerance, 500 mW power rating, 105 Ohms impedance, 100 nA reverse leakage, and 1.1 V forward voltage. Both parts maintain the full operating temperature range of -65°C to 175°C and carry ROHS3 compliance. The SOD-80 MiniMELF package is mechanically compatible with the original Mini MELF footprint. These parts are currently in active production with substantial inventory availability (918 and 1,131 units respectively).

Secondary Recommendation - Automotive Grade Alternative:

The TZMC47-M-08 and TZMC47-M-18 from Vishay General Semiconductor offer identical electrical specifications with the addition of AEC-Q101 automotive qualification. These parts are suitable for applications requiring automotive-grade components. Minor variations include impedance of 110 Ohms (versus 105 Ohms) and forward voltage of 1.5 V @ 200 mA (versus 1.1 V). Both maintain ROHS3 compliance and the full -65°C to 175°C operating range. Inventory availability is high (13,341 and 1,157 units respectively).

Alternative Package Options:

For designs permitting package substitution, the MMSZ5261B-TP (SOD-123 package) from Micro Commercial Co provides active production status with ROHS3 compliance. This part maintains identical electrical specifications but operates within a reduced temperature range of -55°C to 150°C. The 1N5261BUR-1 (DO-213AA package) and CDLL5261B (DO-213AB package) from Microchip Technology offer full temperature range compatibility but lack RoHS compliance.

Compliance Consideration:

Parts with RoHS3 compliance status are preferred for new designs: TZM5261B-GS08, TZM5261B-GS18, TZMC47-M-08, TZMC47-M-18, TLZ47-GS08, TLZ47-GS18, and MMSZ5261B-TP. Non-compliant alternatives (CDLL5261B, 1N5261BUR-1, CLL5261B) are suitable only for legacy or non-regulated applications.

Frequently Asked Questions (FAQ)

Q: Can the DL5261B-TP be directly replaced with the TZM5261B-GS08?

A: Yes. The TZM5261B-GS08 provides complete electrical equivalence with identical zener voltage (47 V), tolerance (±5%), power rating (500 mW), impedance (105 Ohms), reverse leakage (100 nA @ 36 V), and forward voltage (1.1 V @ 200 mA). The SOD-80 MiniMELF package is mechanically compatible with the original Mini MELF footprint. Both parts maintain the -65°C to 175°C operating range and ROHS3 compliance.

Q: What is the difference between the TZM5261B-GS08 and TZMC47-M-08?

A: Both parts share identical zener voltage (47 V), tolerance (±5%), power rating (500 mW), and operating temperature range (-65°C to 175°C). The TZMC47-M-08 carries AEC-Q101 automotive qualification and has slightly higher impedance (110 Ohms versus 105 Ohms) and forward voltage (1.5 V @ 200 mA versus 1.1 V @ 200 mA). The TZMC47-M-08 is specified for automotive applications requiring grade qualification.

Q: Why does the MMSZ5261B-TP have a reduced operating temperature range?

A: The MMSZ5261B-TP operates from -55°C to 150°C, compared to the original -65°C to 175°C range. This reduced range reflects the design specifications of the SOD-123 package variant. Applications requiring the full -65°C to 175°C range should select alternatives such as TZM5261B-GS08, TZM5261B-GS18, or TZMC47-M series parts.

Q: Are there RoHS-compliant alternatives available?

A: Yes. The following parts carry ROHS3 compliance: TZM5261B-GS08, TZM5261B-GS18, TZMC47-M-08, TZMC47-M-18, TLZ47-GS08, TLZ47-GS18, and MMSZ5261B-TP. The CDLL5261B, 1N5261BUR-1, and CLL5261B are RoHS non-compliant and should be used only in applications where RoHS compliance is not required.

Q: Can I use the CDLL5261B as a substitute if my design permits package changes?

A: The CDLL5261B provides electrical equivalence with 47 V zener voltage, ±5% tolerance, 105 Ohms impedance, 100 nA reverse leakage, 1.1 V forward voltage, and -65°C to 175°C operating range. However, this part is RoHS non-compliant. Use is restricted to legacy designs or applications where RoHS compliance is not mandated. The DO-213AB package differs from the original Mini MELF footprint and requires PCB layout modification.

Q: What is the significance of the impedance specification?

A: Impedance (Zzt) affects the dynamic response of the zener diode during transient conditions. The DL5261B-TP specifies 105 Ohms maximum impedance. Substitute parts with impedance values of 105 Ohms (TZM5261B-GS08, TZM5261B-GS18, CDLL5261B, CLL5261B) or 110 Ohms (TZMC47-M-08, TZMC47-M-18) are acceptable. The TLZ47 series with 90 Ohms impedance represents a lower impedance alternative suitable for applications benefiting from improved transient response.

Q: Which substitute part has the highest inventory availability?

A: The TZMC47-M-08 from Vishay General Semiconductor has the highest inventory availability with 13,341 units in stock. This part provides automotive-grade qualification with AEC-Q101 certification, making it suitable for both commercial and automotive applications requiring high-volume procurement.

Q: Can the TLZ47-GS08 be used as a direct replacement?

A: The TLZ47-GS08 provides equivalent zener voltage (47 V), power rating (500 mW), and operating temperature range (-65°C to 175°C) with ROHS3 compliance. However, it differs in impedance (90 Ohms versus 105 Ohms), reverse leakage (40 nA @ 41.8 V versus 100 nA @ 36 V), and forward voltage (1.5 V @ 200 mA versus 1.1 V @ 200 mA). These variations are within acceptable design tolerances for most applications but should be verified against specific circuit requirements.

Q: What packaging options are available for surface mount assembly?

A: Available surface mount packages include Mini MELF/SOD-80 (DL5261B-TP, TLZ47-GS08, TLZ47-GS18, TZMC47-M-08, TZMC47-M-18, TZM5261B-GS08, TZM5261B-GS18, CLL5261B), SOD-123 (MMSZ5261B-TP), DO-213AB (CDLL5261B), and DO-213AA (1N5261BUR-1). The Mini MELF/SOD-80 package is the most common and maintains compatibility with the original DL5261B-TP footprint.

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