1N5917BRL Equivalent & Substitute Parts

Part Overview

The 1N5917BRL is a Zener diode rated at 4.7 V nominal voltage with 3 W maximum power dissipation, packaged in DO-204AL (DO-41) axial through-hole configuration. Manufactured by onsemi, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts maintain the core electrical specifications while offering improved availability and compliance status.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	4.7	V
Tolerance	±5%	-
Power - Max	3	W
Impedance (Max)	5	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 1.5 V
Voltage - Forward (Vf) (Max) @ If	1.5	V @ 200 mA
Operating Temperature Range	-65 to 200	°C
Mounting Type	Through Hole	-
Package / Case	DO-204AL, DO-41, Axial	-

Substitute Part Grouping Explanation

Substitution of the 1N5917BRL is determined by the following critical parameters: nominal Zener voltage (4.7 V), voltage tolerance (±5%), maximum power rating, impedance characteristics, reverse leakage current, forward voltage drop, operating temperature range, and through-hole axial packaging. Substitute parts are grouped into two categories based on power rating alignment:

Category 1: Direct Electrical Equivalents (3 W Power Rating) Parts maintaining the full 3 W power specification with identical or superior electrical characteristics and active product status.

Category 2: Reduced Power Alternatives (1 W to 1.25 W Power Rating) Parts with lower maximum power dissipation but matching nominal voltage, tolerance, and core electrical parameters. These are suitable for applications where the full 3 W capability is not required.

Category 3: Lower Power Alternative (500 mW Power Rating) Parts with significantly reduced power rating, suitable only for low-power applications with identical nominal voltage and tolerance.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Zzt (Max)	Vf (Max) @ If	Temp Range	Package	Status	RoHS
1N5917BRL	onsemi	4.7 V	±5%	3 W	5 Ω	1.5 V @ 200 mA	-65 to 200°C	DO-204AL, DO-41	Obsolete	Non-compliant
1N5917BRLG	onsemi	4.7 V	±5%	3 W	5 Ω	1.5 V @ 200 mA	-65 to 200°C	DO-204AL, DO-41	Active	ROHS3 Compliant
1N4732A	Microchip Technology	4.7 V	±5%	1 W	8 Ω	1.2 V @ 200 mA	-	DO-204AL, DO-41	Active	-
1N4732A,113	Nexperia USA Inc.	4.7 V	±5%	1 W	8 Ω	1.2 V @ 200 mA	-65 to 200°C	DO-204AL, DO-41	Active	ROHS3 Compliant
1N4732A,133	NXP USA Inc.	4.7 V	±5%	1 W	8 Ω	1.2 V @ 200 mA	-65 to 200°C	DO-204AL, DO-41	Active	-
1N5917A	Microchip Technology	4.7 V	±10%	1.25 W	5 Ω	1.2 V @ 200 mA	-65 to 175°C	DO-204AL, DO-41	Active	Non-compliant
1N5917B	Microchip Technology	4.7 V	±5%	1.25 W	5 Ω	1.2 V @ 200 mA	-65 to 175°C	DO-204AL, DO-41	Active	Non-compliant
1N5917D	Microchip Technology	4.7 V	±1%	1.25 W	5 Ω	1.2 V @ 200 mA	-65 to 175°C	DO-204AL, DO-41	Active	Non-compliant
1N5917DG	Microsemi Corporation	4.7 V	±1%	1.25 W	5 Ω	1.2 V @ 200 mA	-65 to 175°C	DO-204AL, DO-41	Active	Non-compliant
1N750A	Fairchild Semiconductor	4.7 V	±5%	500 mW	19 Ω	1.5 V @ 200 mA	-65 to 200°C	DO-204AH, DO-35	Obsolete	ROHS3 Compliant
2EZ4.7D5	Microsemi Corporation	4.7 V	±5%	2 W	4.5 Ω	1.2 V @ 200 mA	-65 to 150°C	DO-204AL, DO-41	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: 1N5917BRLG The 1N5917BRLG is the direct equivalent to the 1N5917BRL, offering identical electrical specifications and packaging. This part is manufactured by onsemi with active product status and ROHS3 compliance. Selection of this part eliminates obsolescence risk while maintaining full electrical compatibility.

Secondary Substitute for Reduced Power Applications: 1N4732A,113 The 1N4732A,113 manufactured by Nexperia USA Inc. provides active product status and ROHS3 compliance. This part is suitable for applications where 1 W power dissipation is sufficient. It maintains the 4.7 V nominal voltage and ±5% tolerance with identical through-hole packaging. Operating temperature range extends to 200°C, matching the original specification.

Alternative for Reduced Power Applications: 1N4732A,133 The 1N4732A,133 from NXP USA Inc. offers the same electrical specifications as the 1N4732A,113 variant with active product status. This part is available in bulk packaging and maintains compatibility with the original circuit requirements for 1 W applications.

Intermediate Power Alternative: 2EZ4.7D5 The 2EZ4.7D5 from Microsemi Corporation provides 2 W power rating, positioning it between the 1 W alternatives and the original 3 W specification. This part offers ROHS3 compliance and active status. Operating temperature range is -65°C to 150°C, which is lower than the original specification.

Lower Power Alternative: 1N750A The 1N750A from Fairchild Semiconductor is rated at 500 mW and is classified as obsolete. This part is suitable only for low-power applications and is not recommended for new designs due to obsolete status.

Microchip Technology Variants: 1N5917A, 1N5917B, 1N5917D, 1N5917DG These parts from Microchip Technology and Microsemi Corporation offer 1.25 W power rating with active product status. The 1N5917D and 1N5917DG variants provide ±1% tolerance for applications requiring tighter voltage regulation. Operating temperature range is limited to -65°C to 175°C. These parts are not RoHS compliant.

Frequently Asked Questions (FAQ)

Q: Can the 1N5917BRLG directly replace the 1N5917BRL? A: Yes. The 1N5917BRLG is electrically and mechanically identical to the 1N5917BRL. Both parts share the same nominal voltage (4.7 V), tolerance (±5%), power rating (3 W), impedance (5 Ω), and packaging (DO-204AL, DO-41 axial). The primary difference is product status: 1N5917BRLG is active with ROHS3 compliance, while 1N5917BRL is obsolete.

Q: What is the difference between the 1 W alternatives and the original 3 W part? A: The 1 W alternatives (1N4732A variants) have lower maximum power dissipation capability. These parts are suitable for circuits where the Zener diode operates at power levels below 1 W. If your application requires the full 3 W capability, these alternatives are not appropriate. The 1N4732A variants also exhibit slightly higher impedance (8 Ω versus 5 Ω) and lower forward voltage (1.2 V versus 1.5 V).

Q: Are there RoHS-compliant alternatives available? A: Yes. The 1N5917BRLG (onsemi), 1N4732A,113 (Nexperia), and 2EZ4.7D5 (Microsemi) are all ROHS3 compliant. The 1N750A is also ROHS3 compliant but is obsolete. If RoHS compliance is required, these options are available.

Q: What is the difference between 1N4732A variants from different manufacturers? A: The 1N4732A,113 (Nexperia USA Inc.) and 1N4732A,133 (NXP USA Inc.) share identical electrical specifications. The primary difference is packaging: 1N4732A,113 is supplied in Cut Tape (CT), while 1N4732A,133 is supplied in Bulk. Both maintain 4.7 V nominal voltage, ±5% tolerance, 1 W power rating, and active product status.

Q: Can I use the 1N5917D or 1N5917DG if I need tighter voltage tolerance? A: Yes. The 1N5917D (Microchip Technology) and 1N5917DG (Microsemi Corporation) both offer ±1% tolerance compared to the original ±5%. However, these parts are rated at 1.25 W, not 3 W. They are suitable only if your application requires both tighter voltage regulation and operates at power levels below 1.25 W. Both parts are non-RoHS compliant.

Q: What is the operating temperature limitation of the 2EZ4.7D5? A: The 2EZ4.7D5 operates from -65°C to 150°C, which is 50°C lower than the original 1N5917BRL specification of -65°C to 200°C. If your application requires operation above 150°C, this part is not suitable.

Q: Why is the 1N750A not recommended despite being RoHS compliant? A: The 1N750A is classified as obsolete, which creates long-term supply risk. Additionally, its 500 mW power rating is significantly lower than the original 3 W specification, making it suitable only for very low-power applications. The 1N5917BRLG provides a better alternative with active status and full power capability.

Q: What packaging differences exist between substitute parts? A: All substitute parts use through-hole axial packaging compatible with the original DO-204AL (DO-41) footprint, with the exception of the 1N750A, which uses DO-204AH (DO-35) packaging. The 1N750A's smaller package may not be compatible with existing PCB layouts designed for DO-41 components.

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