2EZ20D5-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The 2EZ20D5-TP is an active-status through-hole zener diode manufactured by Micro Commercial Co, rated for 20 V nominal zener voltage and 2 W maximum power dissipation in a DO-41 axial package. This component is used for voltage regulation and transient protection in electronic circuits. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit applications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	20	V
Tolerance	±5%	%
Power - Max	2	W
Impedance (Max)	11	Ohms
Current - Reverse Leakage @ Vr	500	nA @ 15.2 V
Voltage - Forward (Vf) (Max) @ If	1.2	V @ 200 mA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	-
Package / Case	DO-41	-

Substitute Part Grouping Explanation

Substitution of zener diodes is determined by matching the following critical parameters: nominal zener voltage (Vz), voltage tolerance, maximum power rating (Pmax), package type, and mounting configuration. The 2EZ20D5-TP operates at 20 V with ±5% tolerance and 2 W power capacity in a DO-41 through-hole package.

Substitute parts 1N4747A and 1N4747ATR share the same nominal zener voltage (20 V) and tolerance (±5%), and both are packaged in DO-41 axial through-hole format. However, these substitutes are rated for 1 W maximum power, which is lower than the main part's 2 W rating. Both substitutes maintain the same forward voltage specification (1.2 V @ 200 mA) and are compatible with the same mounting configuration.

The key differentiating parameters are:

Nominal Zener Voltage: 20 V (matched across all parts)
Voltage Tolerance: ±5% (matched across all parts)
Maximum Power Rating: 2 W (main part) versus 1 W (substitutes)
Package Type: DO-41 (matched across all parts)
Mounting Type: Through Hole (matched across all parts)

Parameter Comparison

Parameter	2EZ20D5-TP	1N4747A	1N4747ATR
Manufacturer	Micro Commercial Co	Lumimax Optoelectronic Technology	onsemi
Voltage - Zener (Nom)	20 V	20 V	20 V
Tolerance	±5%	±5%	±5%
Power - Max	2 W	1 W	1 W
Impedance (Max)	11 Ohms	22 Ohms	22 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 15.2 V	5 µA @ 15.2 V	5 µA @ 15.2 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA	1.2 V @ 200 mA	1.2 V @ 200 mA
Operating Temperature Range	-55 to 150 °C	-65 to 200 °C	-65 to 200 °C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	DO-41	DO-41	DO-41
RoHS Status	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts maintain active product status and comply with RoHS and REACH regulations. The 2EZ20D5-TP is ROHS3 compliant with MSL rating of 1 (Unlimited), while 1N4747ATR is also ROHS3 compliant. The 1N4747A carries standard RoHS compliance.

Selection between the main part and substitutes depends on circuit power dissipation requirements. The 2EZ20D5-TP with its 2 W rating is suitable for applications requiring higher power handling. The 1N4747A and 1N4747ATR, each rated at 1 W, are suitable for lower-power applications. Both substitutes provide wider operating temperature ranges (-65 to 200 °C versus -55 to 150 °C for the main part).

The impedance specification differs: the main part specifies 11 Ohms maximum impedance, while both substitutes specify 22 Ohms maximum impedance. Reverse leakage current is lower in the main part (500 nA) compared to the substitutes (5 µA), indicating tighter leakage specifications for the 2EZ20D5-TP.

Frequently Asked Questions (FAQ)

Q: Can 1N4747A or 1N4747ATR be used as direct replacements for 2EZ20D5-TP?

A: Both parts share identical nominal zener voltage (20 V), voltage tolerance (±5%), forward voltage characteristics, and DO-41 through-hole package configuration. However, the substitutes are rated for 1 W maximum power versus the main part's 2 W rating. Direct substitution is valid only in applications where circuit power dissipation does not exceed 1 W.

Q: What is the significance of the impedance difference between these parts?

A: The 2EZ20D5-TP specifies 11 Ohms maximum impedance, while 1N4747A and 1N4747ATR specify 22 Ohms maximum impedance. Lower impedance provides better voltage regulation characteristics under load changes. Applications requiring tighter voltage regulation may benefit from the lower impedance of the main part.

Q: How do reverse leakage current specifications affect part selection?

A: The 2EZ20D5-TP specifies 500 nA reverse leakage current at 15.2 V, while both substitutes specify 5 µA at the same voltage. Lower leakage current reduces standby power consumption and is preferable in battery-powered or low-power applications. Higher leakage in the substitutes may be acceptable in applications where standby current is not a critical parameter.

Q: Are the operating temperature ranges interchangeable?

A: The 2EZ20D5-TP operates from -55 to 150 °C, while both substitutes operate from -65 to 200 °C. The substitutes provide extended temperature range capability. Selection depends on the specific operating environment; the main part is sufficient for standard industrial temperature ranges, while substitutes offer broader environmental tolerance.

Q: What packaging considerations apply to these parts?

A: All three parts use DO-41 axial through-hole packaging and are compatible with standard PCB through-hole assembly processes. The 2EZ20D5-TP is supplied in Cut Tape (CT) packaging, while 1N4747ATR is also supplied in Cut Tape. The 1N4747A packaging format is not specified in available data. Verify packaging format compatibility with your procurement and assembly requirements.

Q: Are there compliance differences between these parts?

A: All parts are REACH Unaffected and comply with RoHS standards. The 2EZ20D5-TP and 1N4747ATR are ROHS3 compliant, while 1N4747A carries standard RoHS compliance. For applications requiring ROHS3 certification, 2EZ20D5-TP and 1N4747ATR are the appropriate selections.

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