ZPY5V6-TR Zener Diode Equivalent & Substitute Parts

Part Overview

The ZPY5V6-TR is a 5.6 V, 1.3 W Zener diode manufactured by Vishay General Semiconductor - Diodes Division, packaged in Tape & Reel (TR) format with DO-204AL (DO-41) axial through-hole configuration. This component is classified as Active product status with AEC-Q101 automotive qualification and ROHS3 compliance.

Substitute parts are identified when equivalent electrical performance can be maintained across the specified voltage, power, and tolerance parameters while accommodating different packaging formats or manufacturer sources. Alternative sources become necessary due to inventory availability, supply chain optimization, or packaging format requirements in production environments.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	5.6	V
Tolerance	±5%	%
Power - Maximum	1.3	W
Impedance (Maximum)	1	Ohms
Current - Reverse Leakage @ Vr	500 nA @ 1.5 V	nA
Operating Temperature	175	°C
Package / Case	DO-204AL (DO-41)	Axial
Grade	Automotive	AEC-Q101
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution logic for the ZPY5V6-TR is determined by the following critical parameters:

Primary Equivalence Criteria:

Voltage - Zener (Nominal): 5.6 V (fixed requirement)
Tolerance: ±5% (fixed requirement)
Package / Case: DO-204AL (DO-41) Axial (mechanical compatibility)
Mounting Type: Through Hole (assembly compatibility)

Secondary Consideration Parameters:

Power - Maximum: 1.3 W (minimum threshold; higher ratings are acceptable)
Impedance (Maximum): 1 Ohms (reference specification; variations noted)
Current - Reverse Leakage: 500 nA @ 1.5 V (reference specification; variations noted)
Operating Temperature: 175°C (minimum threshold; extended ranges are acceptable)
Grade & Qualification: Automotive / AEC-Q101 (preferred for consistency)
RoHS Status: ROHS3 Compliant (preferred for regulatory alignment)

Substitute parts are grouped into three categories:

Category 1 - Parametric Equivalent (Identical Electrical & Mechanical Specifications): Parts with matching voltage, tolerance, power rating, impedance, and packaging format. These provide direct substitution without circuit performance variation.

Category 2 - Direct Manufacturer Equivalent (Different Packaging Format): Parts with identical electrical specifications but different packaging (Cut Tape vs. Tape & Reel). Electrical performance is equivalent; assembly process compatibility must be verified.

Category 3 - MFR Recommended Equivalent (Acceptable Parameter Variations): Parts with matching voltage and tolerance but variations in power rating, impedance, temperature range, or compliance status. These are acceptable substitutes when the application circuit can tolerate the parameter differences.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Zzt (Max)	Ir @ Vr	Temp Range	Package	Status	RoHS
ZPY5V6-TR	Vishay	5.6 V	±5%	1.3 W	1 Ω	500 nA @ 1.5 V	175°C	DO-41 TR	Active	ROHS3
1N4734A-TAP	Vishay	5.6 V	±5%	1.3 W	5 Ω	10 µA @ 2 V	175°C	DO-41 CT	Active	ROHS3
ZPY5V6-TAP	Vishay	5.6 V	±5%	1.3 W	1 Ω	500 nA @ 1.5 V	175°C	DO-41 CT	Active	ROHS3
1N4734A	Microsemi	5.6 V	±5%	1 W	5 Ω	10 µA @ 2 V	-65°C ~ 200°C	DO-41	Active	Non-compliant
1N4734A-T50R	onsemi	5.6 V	±5%	1 W	5 Ω	10 µA @ 2 V	-65°C ~ 200°C	DO-41 CT	Obsolete	ROHS3
1N4734ATR	onsemi	5.6 V	±5%	1 W	5 Ω	10 µA @ 2 V	-65°C ~ 200°C	DO-41 CT	Active	ROHS3
1N5919BRLG	onsemi	5.6 V	±5%	3 W	2 Ω	5 µA @ 3 V	-65°C ~ 200°C	DO-41 Axial	Active	ROHS3

Engineering Selection Recommendations

Primary Recommendation - Parametric Equivalent:

ZPY5V6-TAP (Vishay, Cut Tape format) provides identical electrical specifications to the ZPY5V6-TR main part. This substitute maintains the 1.3 W power rating, 1 Ohm impedance, and 500 nA reverse leakage characteristics. Selection is appropriate when Cut Tape packaging is compatible with assembly equipment. Product status is Active with ROHS3 compliance.

Secondary Recommendation - Direct Manufacturer Equivalent:

1N4734A-TAP (Vishay, Cut Tape format) offers electrical compatibility with minor parameter variations. Impedance increases to 5 Ohms and reverse leakage increases to 10 µA @ 2 V. Power rating remains at 1.3 W. This substitute is suitable for applications where the circuit design accommodates the higher impedance specification. Product status is Active with ROHS3 compliance.

Tertiary Recommendation - Alternative Manufacturer Source:

1N4734ATR (onsemi, Cut Tape format) provides equivalent voltage and tolerance specifications with extended operating temperature range (-65°C ~ 200°C). Power rating reduces to 1 W; impedance and reverse leakage match the 1N4734A-TAP specification. This substitute is acceptable for applications operating within the 1 W power envelope. Product status is Active with ROHS3 compliance.

Not Recommended - Obsolete Status:

1N4734A-T50R (onsemi) carries Obsolete product status and should not be selected for new designs or long-term supply requirements, despite ROHS3 compliance and acceptable electrical parameters.

Not Recommended - Compliance Mismatch:

1N4734A (Microsemi) is RoHS non-compliant and does not meet ROHS3 requirements specified for the main part. Selection is not appropriate for applications requiring regulatory compliance alignment.

Higher Power Alternative:

1N5919BRLG (onsemi) provides 3 W power rating with 5.6 V nominal voltage and ±5% tolerance. This part is suitable only when circuit design requires higher power dissipation capability than the 1.3 W specification. Extended temperature range (-65°C ~ 200°C) and improved reverse leakage characteristics (5 µA @ 3 V) are additional benefits. Product status is Active with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q1: Can I substitute ZPY5V6-TR with ZPY5V6-TAP?

Yes. ZPY5V6-TAP is a parametric equivalent with identical electrical specifications (5.6 V, ±5%, 1.3 W, 1 Ohm impedance, 500 nA reverse leakage). The only difference is packaging format: ZPY5V6-TAP uses Cut Tape (CT) instead of Tape & Reel (TR). Verify that your assembly equipment can process Cut Tape format before implementation.

Q2: What is the difference between 1N4734A-TAP and ZPY5V6-TAP?

Both parts are manufactured by Vishay with identical 5.6 V, ±5%, 1.3 W specifications and Cut Tape packaging. The primary difference is impedance: 1N4734A-TAP specifies 5 Ohms maximum impedance, while ZPY5V6-TAP specifies 1 Ohm maximum impedance. Additionally, reverse leakage differs: 1N4734A-TAP measures 10 µA @ 2 V versus 500 nA @ 1.5 V for ZPY5V6-TAP. Select based on circuit impedance requirements.

Q3: Can I use 1N4734ATR as a direct replacement for ZPY5V6-TR?

1N4734ATR is functionally compatible but with parameter variations. Voltage and tolerance match (5.6 V, ±5%), but power rating reduces from 1.3 W to 1 W. Impedance increases to 5 Ohms, and reverse leakage increases to 10 µA @ 2 V. Operating temperature range extends to -65°C ~ 200°C. This substitute is acceptable only if your circuit design operates within the 1 W power specification and can tolerate the higher impedance.

Q4: Why is 1N4734A-T50R not recommended?

1N4734A-T50R carries Obsolete product status, indicating discontinued manufacturing and limited future availability. Although electrical specifications are acceptable and ROHS3 compliance is maintained, new designs should not depend on obsolete components. Use active-status alternatives for long-term supply security.

Q5: When should I select 1N5919BRLG instead of the main part?

1N5919BRLG is a higher-power alternative (3 W vs. 1.3 W) with identical 5.6 V nominal voltage and ±5% tolerance. Select this part only when circuit analysis determines that power dissipation exceeds 1.3 W. The 3 W rating provides design margin for thermal management. Extended temperature range (-65°C ~ 200°C) and improved reverse leakage (5 µA @ 3 V) are additional benefits for demanding applications.

Q6: Is the Microsemi 1N4734A suitable for my application?

The Microsemi 1N4734A meets electrical requirements (5.6 V, ±5%, 1 W) but is RoHS non-compliant. If your application or customer requirements mandate ROHS3 compliance, this part is not suitable. Select compliant alternatives such as 1N4734ATR (onsemi) or 1N4734A-TAP (Vishay) instead.

Q7: What does impedance (Zzt) mean in zener diode selection?

Impedance (Zzt) represents the dynamic impedance of the zener diode at the specified test current. Lower impedance values indicate better voltage regulation and lower output impedance. ZPY5V6-TR specifies 1 Ohm maximum impedance, providing superior regulation compared to alternatives specifying 5 Ohms. Select based on circuit voltage regulation requirements.

Q8: Can I use Cut Tape (CT) packaging instead of Tape & Reel (TR)?

Yes, provided your assembly equipment supports Cut Tape format. Electrical performance is identical. Cut Tape packaging typically offers lower unit cost and is suitable for lower-volume production runs. Tape & Reel format is optimized for high-speed automated assembly. Verify equipment compatibility before switching packaging formats.

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