1N4748A_S00Z Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N4748A_S00Z is a 22 V, 1 W Zener diode manufactured by onsemi in a through-hole DO-41 package. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design and procurement requirements. The electrical and mechanical specifications of this diode remain consistent across multiple manufacturers and packaging configurations, enabling direct substitution based on standardized parameters.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	22	V
Tolerance	±5	%
Power - Maximum	1	W
Impedance (Maximum)	23	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 16.7 V
Operating Temperature Range	-65 to 200	°C (TJ)
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial

Substitute Part Grouping Explanation

Substitution of the 1N4748A_S00Z is determined by electrical parameter equivalence and mechanical compatibility. All substitute parts listed maintain identical zener voltage (22 V), tolerance (±5%), maximum power dissipation (1 W), impedance (23 Ohms maximum), and reverse leakage current (5 µA @ 16.7 V) specifications. Operating temperature ranges are equivalent or exceed the original specification. All parts utilize through-hole mounting in DO-41 or DO-204AL axial packages, ensuring mechanical interchangeability.

Substitutes are categorized as follows:

Direct Manufacturer Equivalents (onsemi): Parts manufactured by onsemi with identical electrical specifications and active product status, differing only in packaging configuration (Tape & Box or Cut Tape).

Cross-Manufacturer Equivalents: Parts from alternative manufacturers (Nexperia USA Inc., Microchip Technology, Lumimax Optoelectronic Technology) with identical electrical and mechanical specifications.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Zzt (Max)	Ir @ Vr	Temp Range	Package	Product Status	RoHS Status
1N4748A_S00Z	onsemi	22 V	±5%	1 W	23 Ω	5 µA @ 16.7 V	-65 to 200°C	DO-41	Obsolete	Not Specified
1N4748A-T50A	onsemi	22 V	±5%	1 W	23 Ω	5 µA @ 16.7 V	-65 to 200°C	DO-41	Active	ROHS3 Compliant
1N4748ATR	onsemi	22 V	±5%	1 W	23 Ω	5 µA @ 16.7 V	-65 to 200°C	DO-41	Active	ROHS3 Compliant
1N4748A,113	Nexperia USA Inc.	22 V	±5%	1 W	23 Ω	5 µA @ 16.7 V	-65 to 200°C	DO-41	Active	ROHS3 Compliant
1N4748AP/TR8	Microchip Technology	22 V	±5%	1 W	23 Ω	5 µA @ 16.7 V	-65 to 150°C	DO-204AL (DO-41)	Active	RoHS Non-Compliant
1N4748A	Lumimax Optoelectronic Technology	22 V	±5%	1 W	23 Ω	5 µA @ 16.7 V	-65 to 200°C	DO-41G	Active	RoHS Compliant

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs):

1N4748A-T50A and 1N4748ATR (onsemi) are the preferred substitutes. Both parts are manufactured by the original equipment manufacturer, maintain active product status, and carry ROHS3 compliance certification. These parts are electrically and mechanically identical to the obsolete 1N4748A_S00Z, with the primary distinction being packaging format (Tape & Box versus Cut Tape). Inventory availability is substantial for both variants.

Secondary Substitutes (Cross-Manufacturer Options):

1N4748A,113 (Nexperia USA Inc.) and 1N4748A (Lumimax Optoelectronic Technology) provide active alternatives with full electrical equivalence and RoHS compliance. These parts are suitable for applications where manufacturer diversification is required or when primary substitutes are unavailable.

Conditional Substitute (Temperature-Limited Application):

1N4748AP/TR8 (Microchip Technology) maintains electrical equivalence but specifies a reduced operating temperature range (-65 to 150°C versus -65 to 200°C). This part is suitable only for applications where the maximum junction temperature does not exceed 150°C. Additionally, this part carries RoHS non-compliant status and should be evaluated against regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can 1N4748A-T50A directly replace 1N4748A_S00Z in existing designs?

A: Yes. The 1N4748A-T50A is electrically and mechanically identical to the 1N4748A_S00Z. The primary difference is packaging format (Tape & Box versus bulk). Both parts are DO-41 axial through-hole components with identical zener voltage, power rating, and operating temperature specifications.

Q: What is the difference between 1N4748A-T50A and 1N4748ATR?

A: Both parts are manufactured by onsemi with identical electrical specifications. The difference is packaging configuration: 1N4748A-T50A is supplied in Tape & Box format, while 1N4748ATR is supplied in Cut Tape format. Selection depends on procurement and assembly requirements.

Q: Are cross-manufacturer parts (Nexperia, Microchip, Lumimax) fully compatible?

A: Yes, for applications within the specified operating parameters. All listed cross-manufacturer parts maintain identical zener voltage (22 V), tolerance (±5%), power dissipation (1 W), and impedance specifications. Verify compliance requirements, as RoHS status varies by manufacturer.

Q: What is the temperature limitation of 1N4748AP/TR8?

A: The 1N4748AP/TR8 specifies an operating temperature range of -65 to 150°C, compared to -65 to 200°C for other substitutes. This part is suitable only for applications where maximum junction temperature remains below 150°C. Verify thermal design requirements before selection.

Q: Does package designation (DO-41 versus DO-204AL) affect substitution?

A: No. DO-41 and DO-204AL are equivalent designations for the same axial through-hole package. All listed parts are mechanically interchangeable in standard through-hole PCB layouts.

Q: Which substitute offers the best inventory availability?

A: 1N4748ATR (onsemi, Cut Tape) offers the highest inventory level at 21,963 pieces. 1N4748A (Lumimax) provides 10,645 pieces. Both represent substantial stock for procurement planning.

Q: Are all substitutes RoHS compliant?

A: Most substitutes carry RoHS compliance certification (ROHS3 or RoHS Compliant). The exception is 1N4748AP/TR8 (Microchip Technology), which is RoHS non-compliant. Verify compliance requirements for your application and regulatory jurisdiction.

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