MZP4735ARLG Equivalent & Substitute Parts

Part Overview

The MZP4735ARLG is a 6.2 V, 1 W Zener diode manufactured by onsemi in DO-204AL (DO-41) axial through-hole packaging. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design support and procurement. The part maintains 831 units in current inventory stock. Equivalent alternatives are available from multiple manufacturers with matching or enhanced electrical specifications and improved product status classifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	6.2	V
Tolerance	±5%	—
Power - Maximum	1	W
Impedance (Maximum)	2	Ohms
Current - Reverse Leakage @ Vr	10	µA @ 3 V
Voltage - Forward (Maximum) @ If	1.5	V @ 200 mA
Operating Temperature Range	-65 to 200	°C
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Moisture Sensitivity Level	1 (Unlimited)	—
REACH Status	REACH Unaffected	—

Substitute Part Grouping Explanation

Substitution of the MZP4735ARLG is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nominal): 6.2 V (exact match required)
Tolerance: ±5% or tighter (±2% acceptable as superior specification)
Power - Maximum: 1 W or greater (equal or higher rating acceptable)
Impedance (Maximum): 2 Ohms or lower
Current - Reverse Leakage @ Vr: 10 µA @ 3 V or lower
Operating Temperature Range: -65°C to 200°C minimum (or -65°C to 150°C acceptable for most applications)
Mounting Type: Through Hole (required)
Package / Case: DO-204AL, DO-41, or Axial (interchangeable)

Substitution Categories:

Direct Equivalents: Parts with identical electrical specifications and active product status, differing only in packaging format or manufacturer.

Parametric Equivalents: Parts meeting or exceeding all critical electrical parameters with active product status and improved compliance certifications.

Similar Parts with Enhanced Ratings: Parts with identical nominal voltage and tolerance but higher power ratings (3 W vs. 1 W), suitable for applications with thermal margin requirements.

Limited Substitutes: Parts with matching nominal voltage and tolerance but differing in secondary parameters (impedance, temperature range, or power rating), applicable only when application constraints permit deviation.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (W)	Zzt (Ohms)	Ir @ Vr (µA)	Vf @ If (V)	Temp Range (°C)	Package	Product Status	RoHS Status
MZP4735ARLG	onsemi	6.2	±5%	1	2	10 @ 3	1.5 @ 200 mA	-65 to 200	DO-41 Axial	Obsolete	—
1N4735A-T50R	onsemi	6.2	±5%	1	2	10 @ 3	—	-65 to 200	DO-41	Obsolete	ROHS3 Compliant
1N4735A	Lumimax Optoelectronic Technology	6.2	±5%	1	2	10 @ 3	1.2 @ 200 mA	-65 to 200	DO-41G	Active	RoHS Compliant
1N5920BRLG	onsemi	6.2	±5%	3	2	5 @ 4	1.5 @ 200 mA	-65 to 200	Axial	Active	ROHS3 Compliant
1N4735A-T50A	Fairchild Semiconductor	6.2	±5%	1	2	10 @ 3	—	-65 to 200	DO-204AL (DO-41)	Active	—
1N4735ATR	onsemi	6.2	±5%	1	2	10 @ 3	—	-65 to 200	DO-41	Active	ROHS3 Compliant
1N4460	Microchip Technology	6.2	±5%	1.5	4	10 @ 3.72	1.5 @ 1 A	-65 to 175	DO-41	Active	RoHS non-compliant
1N4691	Microchip Technology	6.2	±5%	0.5	—	10 @ 5	1.1 @ 200 mA	-65 to 175	DO-35	Active	RoHS non-compliant
1N4735AP/TR12	Microchip Technology	6.2	±5%	1	2	10 @ 3	1.2 @ 200 mA	-65 to 150	DO-204AL (DO-41)	Active	RoHS non-compliant
1N4735AP/TR8	Microchip Technology	6.2	±5%	1	2	10 @ 3	1.2 @ 200 mA	-65 to 150	DO-204AL (DO-41)	Active	ROHS3 Compliant
1N4735CE3/TR13	Microchip Technology	6.2	±2%	1	2	10 @ 3	1.2 @ 200 mA	-65 to 150	DO-204AL (DO-41)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Preferred):

1N4735ATR (onsemi) and 1N4735AP/TR8 (Microchip Technology) are the primary recommended substitutes. Both maintain identical electrical specifications to the MZP4735ARLG (6.2 V, 1 W, ±5%, 2 Ohms impedance, 10 µA reverse leakage) with active product status and ROHS3 compliance. The 1N4735ATR offers extended temperature operation to 200°C, matching the original part's thermal range. The 1N4735AP/TR8 operates to 150°C, which is acceptable for most industrial and commercial applications.

Tier 2 - Parametric Equivalents (Active Status):

1N4735A-T50A (Fairchild Semiconductor) and 1N4735A (Lumimax Optoelectronic Technology) provide identical electrical performance with active product status. The Lumimax part offers RoHS compliance and extended temperature operation to 200°C. Both are suitable for long-term procurement strategies.

Tier 3 - Enhanced Rating Alternative:

1N5920BRLG (onsemi) provides superior power dissipation (3 W vs. 1 W) with identical nominal voltage, tolerance, and impedance specifications. This part is recommended for applications requiring thermal margin or where power dissipation uncertainty exists. Active product status and ROHS3 compliance ensure supply continuity.

Tier 4 - Limited Substitutes (Application-Dependent):

1N4460 (Microchip Technology) offers 1.5 W power rating with matching voltage and tolerance but exhibits higher impedance (4 Ohms vs. 2 Ohms) and operates to 175°C. This part is suitable only when application circuit design accommodates the impedance deviation.

1N4691 (Microchip Technology) provides 6.2 V nominal voltage with ±5% tolerance but reduced power rating (500 mW) and different package (DO-35). This part is not recommended as a direct substitute due to insufficient power rating.

Compliance Considerations:

Parts with ROHS3 compliance (1N4735ATR, 1N4735AP/TR8, 1N4735CE3/TR13, 1N5920BRLG) are preferred for new designs and applications subject to RoHS directives. The 1N4735A-T50A (Fairchild) and 1N4735AP/TR12 (Microchip) lack explicit RoHS certification and should be evaluated against specific procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can the 1N4735ATR directly replace the MZP4735ARLG without circuit modification?

A: Yes. The 1N4735ATR maintains identical electrical specifications across all critical parameters: 6.2 V nominal voltage, ±5% tolerance, 1 W power rating, 2 Ohms maximum impedance, and 10 µA reverse leakage. Both employ through-hole DO-41 axial packaging. No circuit modification is required.

Q: What is the difference between the 1N4735A-T50R and 1N4735ATR?

A: Both parts are manufactured by onsemi with identical electrical specifications. The primary difference is packaging format: 1N4735A-T50R is supplied in Cut Tape (CT) format, while 1N4735ATR is supplied in Cut Tape (CT) as well. Both are obsolete or active status variants of the same base product number 1N4735. Verify packaging requirements with your procurement specification.

Q: Why is the 1N5920BRLG listed as a substitute if it has 3 W power rating instead of 1 W?

A: The 1N5920BRLG is a parametric equivalent with enhanced power rating. It maintains identical nominal voltage (6.2 V), tolerance (±5%), and impedance (2 Ohms). The higher power rating (3 W) does not prevent substitution; it provides additional thermal margin and is suitable for applications where power dissipation may exceed 1 W or where design margin is required. The part is electrically compatible and backward-compatible in circuits designed for 1 W operation.

Q: Can I use the 1N4735CE3/TR13 instead of the MZP4735ARLG?

A: Yes, with one consideration. The 1N4735CE3/TR13 offers tighter voltage tolerance (±2% vs. ±5%), which is a superior specification. All other electrical parameters match: 6.2 V nominal, 1 W power, 2 Ohms impedance, 10 µA reverse leakage. The operating temperature range is -65°C to 150°C, which is acceptable for most applications but does not extend to 200°C like the original part. Verify your application's maximum operating temperature requirement before selection.

Q: What is the difference between DO-41 and DO-204AL packaging?

A: DO-41 and DO-204AL are equivalent designations for the same axial through-hole diode package. DO-204AL is the formal JEDEC designation, while DO-41 is the legacy designation. Both refer to identical physical dimensions and lead configurations. Parts specified as either DO-41 or DO-204AL are mechanically and electrically interchangeable.

Q: Is the 1N4460 a suitable substitute for the MZP4735ARLG?

A: The 1N4460 maintains the 6.2 V nominal voltage and ±5% tolerance but differs in secondary specifications: 1.5 W power rating (vs. 1 W), 4 Ohms impedance (vs. 2 Ohms), and 175°C maximum temperature (vs. 200°C). Substitution is possible only if your application circuit design accommodates the higher impedance value. The impedance difference may affect voltage regulation characteristics in precision applications. Verify circuit performance before implementation.

Q: Why is the 1N4691 not recommended as a substitute?

A: The 1N4691 has insufficient power rating (500 mW vs. 1 W required) and uses a different package (DO-35 vs. DO-41). While the nominal voltage (6.2 V) and tolerance (±5%) match, the reduced power rating makes this part unsuitable for applications requiring 1 W dissipation. Additionally, the DO-35 package has different physical dimensions and lead spacing, requiring PCB layout modification.

Q: What is the advantage of selecting an active product status part over an obsolete part?

A: Active product status ensures long-term availability, consistent manufacturing processes, and ongoing supplier support. Obsolete parts like the MZP4735ARLG face eventual stock depletion and manufacturing discontinuation. Active alternatives such as 1N4735ATR, 1N4735AP/TR8, and 1N4735A provide supply security for current and future production runs. Additionally, active parts typically include current compliance certifications (RoHS, REACH) and improved quality documentation.

Q: Can I mix different manufacturers' parts in the same circuit board?

A: Yes. All listed substitute parts meet identical or superior electrical specifications for the 6.2 V, 1 W Zener diode function. Mixing manufacturers (onsemi, Microchip, Fairchild, Lumimax) within the same design is acceptable provided all parts meet the specified electrical parameters. However, for production consistency and supply chain management, it is recommended to establish a primary and secondary supplier preference list rather than mixing multiple sources within a single production batch.

Q: What does ROHS3 compliance mean?

A: ROHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the part meets European Union regulations restricting the use of specific hazardous materials including lead, mercury, cadmium, and certain flame retardants. ROHS3 compliant parts are suitable for applications subject to environmental and regulatory requirements. Parts without explicit RoHS certification may contain restricted substances and should be evaluated against your specific regulatory requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message