1N5347BRL Equivalent & Substitute Parts

Part Overview

The 1N5347BRL is a Zener diode rated for 10 V nominal voltage and 5 W maximum power dissipation in an axial through-hole package. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design requirements and component procurement. Active alternatives with identical or compatible electrical specifications are available from multiple manufacturers.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	10 V
Tolerance	±5%
Power - Max	5 W
Impedance (Max)	2 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 7.6 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1 A
Operating Temperature Range	-65°C ~ 200°C
Mounting Type	Through Hole
Package / Case	T-18, Axial

Substitute Part Grouping Explanation

Substitution of the 1N5347BRL is determined by electrical parameter equivalence and mechanical compatibility. The critical parameters for substitution are:

Electrical Equivalence Criteria:

Zener voltage: 10 V nominal
Power rating: 5 W maximum
Tolerance: ±5%
Impedance: 2 Ohms maximum
Reverse leakage current: 5 µA @ 7.6 V
Forward voltage: 1.2 V @ 1 A maximum
Operating temperature range compatibility

Mechanical Compatibility Criteria:

Through-hole mounting type
Axial package configuration

Substitute parts are grouped into two categories: direct manufacturer equivalents and similar parts with compatible specifications. Direct equivalents maintain identical electrical and mechanical parameters. Similar parts may have different package designations (DO-15 versus T-18) but retain all critical electrical specifications within the allowed tolerance range.

Parameter Comparison

Parameter	1N5347BRL (onsemi)	1N5347BRLG (onsemi)	1N5347B-TP (Micro Commercial Co)
Voltage - Zener (Nom)	10 V	10 V	10 V
Tolerance	±5%	±5%	±5%
Power - Max	5 W	5 W	5 W
Impedance (Max)	2 Ohms	2 Ohms	2 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 7.6 V	5 µA @ 7.6 V	5 µA @ 7.6 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1 A	1.2 V @ 1 A	1.2 V @ 1 A
Operating Temperature Range	-65°C ~ 200°C	-65°C ~ 200°C	-55°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	T-18, Axial	T-18, Axial	DO-204AC, DO-15, Axial
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

1N5347BRLG (onsemi) - Direct Equivalent

The 1N5347BRLG is the primary substitute for the obsolete 1N5347BRL. This part maintains identical electrical specifications and package configuration. The 1N5347BRLG is classified as active product status with ROHS3 compliance, providing long-term availability and regulatory alignment. The packaging format is cut tape (CT), suitable for automated assembly processes. This part is the recommended direct replacement.

1N5347B-TP (Micro Commercial Co) - Compatible Alternative

The 1N5347B-TP provides electrical equivalence with all critical parameters matching the original specification. This part is active and ROHS3 compliant. The package designation differs (DO-15 versus T-18), though both are axial through-hole configurations. The operating temperature range is narrower (-55°C ~ 150°C versus -65°C ~ 200°C), which may limit applicability in extreme temperature environments. This part is suitable for applications within the reduced temperature range.

Frequently Asked Questions (FAQ)

Q: Can the 1N5347BRLG directly replace the 1N5347BRL without circuit modification?

A: Yes. The 1N5347BRLG maintains identical electrical specifications and axial package configuration. No circuit modification is required for direct substitution.

Q: What is the difference between the T-18 and DO-15 package designations?

A: Both are axial through-hole packages for Zener diodes. T-18 and DO-15 (DO-204AC) are different industry designations for similar form factors. Physical dimensions may vary slightly, requiring verification against PCB footprint specifications.

Q: Is the 1N5347B-TP suitable for applications requiring the full -65°C ~ 200°C temperature range?

A: No. The 1N5347B-TP operates within -55°C ~ 150°C. Applications requiring operation below -55°C or above 150°C must use the 1N5347BRLG or 1N5347BRL.

Q: What is the significance of RoHS3 compliance for these parts?

A: ROHS3 compliance indicates conformance to Restriction of Hazardous Substances regulations. The 1N5347BRLG and 1N5347B-TP are ROHS3 compliant, while the original 1N5347BRL is non-compliant. Compliance may be required for specific applications or markets.

Q: Are there inventory considerations when selecting between substitute parts?

A: Yes. The 1N5347BRLG has 33,669 pieces in stock, while the 1N5347B-TP has 710 pieces. Availability may influence selection for high-volume procurement.

Q: Can the 1N5347B-TP be used in place of the 1N5347BRLG?

A: Electrical substitution is valid within the operating temperature range of -55°C ~ 150°C. Package differences (DO-15 versus T-18) require PCB footprint compatibility verification. The narrower temperature range may restrict applicability in certain environments.

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