1N4750A_S00Z Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N4750A_S00Z is a 27 V, 1 W Zener diode manufactured by onsemi in a DO-41 through-hole package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design and procurement requirements. The part operates across a temperature range of -65°C to 200°C and maintains a ±5% voltage tolerance with a maximum impedance of 35 Ohms. Equivalent and substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure direct replacement capability.

Key Parameters

Parameter	Specification
Voltage - Zener (Nominal)	27 V
Power - Maximum	1 W
Tolerance	±5%
Impedance (Maximum)	35 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 20.6 V
Operating Temperature Range	-65°C to 200°C
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial

Substitute Part Grouping Explanation

Substitution of the 1N4750A_S00Z is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters establish substitution validity:

Electrical Parameters:

Zener voltage: 27 V nominal
Power dissipation: 1 W maximum
Voltage tolerance: ±5%
Maximum impedance: 35 Ohms
Reverse leakage current: 5 µA @ 20.6 V
Operating temperature range: -65°C to 200°C

Mechanical Parameters:

Mounting type: Through Hole
Package designation: DO-41 (DO-204AL, Axial)

All identified substitute parts maintain these specifications without deviation. Substitutes are grouped based on product status (active versus obsolete) and compliance certifications where applicable.

Parameter Comparison

Parameter	1N4750A_S00Z (onsemi)	1N4750A (Lumimax)	1N4750ARL (onsemi)	1N4750A_NL (Fairchild)
Voltage - Zener (Nom)	27 V	27 V	27 V	27 V
Power - Max	1 W	1 W	1 W	1 W
Tolerance	±5%	±5%	±5%	±5%
Impedance (Max)	35 Ohms	35 Ohms	35 Ohms	35 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 20.6 V	5 µA @ 20.6 V	5 µA @ 20.6 V	5 µA @ 20.6 V
Operating Temperature	-65°C ~ 200°C	-65°C ~ 200°C	-65°C ~ 200°C	-65°C ~ 200°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

Primary Substitute: 1N4750ARL (onsemi)

The 1N4750ARL is a parametric equivalent manufactured by onsemi, the original manufacturer of the 1N4750A_S00Z. This part maintains full electrical and mechanical compatibility with identical specifications. The 1N4750ARL is in active production status with 28,126 units in stock. This part is RoHS non-compliant and carries MSL Level 1 (Unlimited) moisture sensitivity rating.

Secondary Substitute: 1N4750A (Lumimax Optoelectronic Technology)

The 1N4750A from Lumimax is a parametric equivalent with identical electrical specifications and DO-41 package configuration. This part is in active production status with 10,200 units in stock. The Lumimax part is RoHS compliant and carries MSL Level 1 (Unlimited) moisture sensitivity rating. Forward voltage specification (1.2 V @ 200 mA) is provided as additional documentation.

Tertiary Substitute: 1N4750A_NL (Fairchild Semiconductor)

The 1N4750A_NL from Fairchild Semiconductor is a parametric equivalent with identical electrical specifications and DO-41 package configuration. This part is in active production status with 30,721 units in stock. RoHS status is not applicable, and REACH status is vendor undefined. MSL Level 1 (Unlimited) moisture sensitivity rating applies.

All three substitute parts are electrically and mechanically interchangeable with the obsolete 1N4750A_S00Z. Selection among substitutes should be based on procurement availability, compliance requirements, and supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can the 1N4750ARL directly replace the 1N4750A_S00Z?

A: Yes. The 1N4750ARL maintains identical electrical parameters (27 V nominal zener voltage, 1 W power rating, ±5% tolerance, 35 Ohms maximum impedance, 5 µA reverse leakage @ 20.6 V) and operates across the same temperature range (-65°C to 200°C). Both parts use DO-41 through-hole packaging. Direct substitution is valid.

Q: What is the difference between the Lumimax 1N4750A and the onsemi 1N4750ARL?

A: Both parts are parametric equivalents with identical core electrical specifications. The primary differences are manufacturer identity and compliance certifications. The Lumimax part is RoHS compliant, while the onsemi 1N4750ARL is RoHS non-compliant. Both carry MSL Level 1 (Unlimited) moisture sensitivity. Electrical performance and package compatibility are equivalent.

Q: Are all substitute parts available in the same DO-41 package?

A: Yes. All substitute parts (1N4750A from Lumimax, 1N4750ARL from onsemi, and 1N4750A_NL from Fairchild) are supplied in DO-41 through-hole axial packages. Mechanical compatibility with existing PCB layouts is maintained.

Q: Does the Fairchild 1N4750A_NL have any compliance limitations?

A: The Fairchild 1N4750A_NL carries RoHS status as "Not applicable" and REACH status as "Vendor Undefined." These designations indicate incomplete compliance documentation from the manufacturer. Electrical specifications and package compatibility remain equivalent to other substitutes.

Q: What is the reverse leakage current specification for all substitute parts?

A: All substitute parts maintain a reverse leakage current specification of 5 µA @ 20.6 V, identical to the original 1N4750A_S00Z. This parameter is consistent across all equivalent parts.

Q: Can these parts be used in applications requiring RoHS compliance?

A: The Lumimax 1N4750A is RoHS compliant. The onsemi 1N4750ARL is RoHS non-compliant. The Fairchild 1N4750A_NL carries "Not applicable" RoHS status. Selection depends on specific compliance requirements of the end application.

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