1N5368BRL Zener Diode 47V 5W Equivalent & Substitute Parts

Part Overview

The 1N5368BRL is a through-hole axial zener diode rated at 47 V nominal voltage with 5 W maximum power dissipation and ±5% tolerance. Manufactured by onsemi, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active product lines are necessary for new designs, production continuity, and long-term component availability. Substitute parts maintain the core electrical specifications while offering improved availability, compliance certifications, or packaging options.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	47	V
Tolerance	±5%	—
Power - Max	5	W
Impedance (Max)	25	Ohms
Current - Reverse Leakage @ Vr	500 nA @ 35.8 V	—
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1 A	—
Operating Temperature	-65°C ~ 200°C	—
Mounting Type	Through Hole	—
Package / Case	T-18, Axial	—
RoHS Status	RoHS non-compliant	—

Substitute Part Grouping Explanation

Substitution logic for the 1N5368BRL is based on the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 47 V (exact match required)
Power - Max: 5 W (exact match required)
Tolerance: ±5% (exact match required)
Impedance (Max): 25 Ohms (exact match required)
Package / Case: T-18, Axial (exact match required for mechanical compatibility)
Mounting Type: Through Hole (exact match required)

Substitution Categories:

Direct Equivalents (Identical Electrical & Mechanical Specifications): Parts that match all primary criteria with identical or superior product status and compliance certifications.

Base Number Variants (Same Base Product, Different Packaging or Tolerance): Parts sharing the 1N5368 base product number but with different packaging formats (Cut Tape, Tape & Reel) or tolerance grades (±10%, ±20%). These maintain core electrical performance but differ in tolerance or delivery format.

Similar Alternatives (Matching Voltage & Tolerance, Different Power Rating): Parts with identical 47 V voltage and ±5% tolerance but reduced power ratings (1.5 W, 500 mW). These are suitable only for applications with lower power dissipation requirements.

Unspecified Alternatives: Parts with incomplete parameter data in the provided input. These cannot be fully evaluated for substitution compatibility.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (W)	Zzt (Ohms)	Package	Product Status	RoHS Status
1N5368BRL	onsemi	47	±5%	5	25	T-18, Axial	Obsolete	Non-compliant
1N5368BRLG	onsemi	47	±5%	5	25	T-18, Axial	Active	ROHS3 Compliant
1N5368B	Microsemi Corporation	47	±5%	5	25	T-18, Axial	Active	Non-compliant
1N4481	Microchip Technology	47	±5%	1.5	50	DO-41, Axial	Active	Non-compliant
1N5261B	Taiwan Semiconductor Corporation	47	±5%	0.5	105	DO-35, Axial	Active	ROHS3 Compliant
1N5368/TR12	Microchip Technology	47	±20%	5	25	T-18, Axial	Active	Non-compliant
1N5368/TR8	Microchip Technology	47	±20%	5	25	T-18, Axial	Active	Non-compliant
1N5368A/TR12	Microchip Technology	47	±10%	5	25	T-18, Axial	Active	Non-compliant
1N5368A/TR8	Microchip Technology	47	±10%	5	25	T-18, Axial	Active	Non-compliant

Engineering Selection Recommendations

Tier 1: Direct Equivalents (Recommended for Obsolescence Replacement)

1N5368BRLG (onsemi) is the primary recommended substitute. It maintains identical electrical specifications (47 V, ±5%, 5 W, 25 Ohms impedance) and mechanical compatibility (T-18 Axial package). The part is in active production status with ROHS3 compliance certification, providing superior long-term availability and regulatory compliance compared to the obsolete 1N5368BRL.

1N5368B (Microsemi Corporation) is a secondary direct equivalent. It matches all electrical parameters and package specifications but remains RoHS non-compliant. Product status is active, ensuring availability.

Tier 2: Base Number Variants (Tolerance Trade-offs)

1N5368A/TR8 and 1N5368A/TR12 (Microchip Technology) maintain 5 W power rating and T-18 package but specify ±10% tolerance instead of ±5%. These are suitable for applications where ±10% voltage tolerance is acceptable.

1N5368/TR8 and 1N5368/TR12 (Microchip Technology) maintain 5 W power rating and T-18 package but specify ±20% tolerance. These are suitable only for applications with relaxed voltage tolerance requirements.

Tier 3: Reduced Power Alternatives (Lower Power Applications Only)

1N4481 (Microchip Technology) provides 47 V nominal voltage with ±5% tolerance but reduced to 1.5 W power rating. Package is DO-41 (different from T-18). Suitable only for applications requiring less than 1.5 W dissipation.

1N5261B (Taiwan Semiconductor Corporation) provides 47 V nominal voltage with ±5% tolerance but reduced to 500 mW power rating. Package is DO-35 (different from T-18). ROHS3 compliant. Suitable only for low-power applications.

Compliance Considerations:

For RoHS-compliant designs, 1N5368BRLG or 1N5261B are required. The original 1N5368BRL and most alternatives remain RoHS non-compliant.

Frequently Asked Questions (FAQ)

Q: Can 1N5368BRLG directly replace 1N5368BRL without circuit modification?

A: Yes. 1N5368BRLG is a direct equivalent with identical electrical specifications (47 V, ±5%, 5 W, 25 Ohms) and T-18 Axial package. No circuit modification is required. The part is in active production with improved RoHS3 compliance.

Q: What is the difference between 1N5368BRL and 1N5368B?

A: Both parts share identical electrical specifications (47 V, ±5%, 5 W, 25 Ohms impedance) and T-18 Axial package. The primary difference is manufacturer: 1N5368BRL is onsemi (obsolete), while 1N5368B is Microsemi Corporation (active). 1N5368B is suitable for direct substitution.

Q: Can I use 1N5368/TR12 or 1N5368/TR8 as substitutes?

A: These parts maintain 47 V voltage, 5 W power, and T-18 package but specify ±20% tolerance instead of ±5%. They are suitable only if your circuit design tolerates ±20% zener voltage variation. For applications requiring ±5% accuracy, these are not recommended.

Q: What is the difference between 1N5368A/TR8 and 1N5368/TR8?

A: Both maintain 47 V, 5 W, and T-18 package. The difference is tolerance: 1N5368A/TR8 specifies ±10%, while 1N5368/TR8 specifies ±20%. Choose based on your tolerance requirements.

Q: Can I use 1N4481 or 1N5261B instead of 1N5368BRL?

A: These parts have reduced power ratings (1.5 W and 500 mW respectively) and different packages (DO-41 and DO-35). They are suitable only for applications with lower power dissipation requirements. If your circuit requires 5 W dissipation capability, these alternatives are not suitable.

Q: What does the "TR" designation mean in part numbers like 1N5368/TR12?

A: "TR" indicates Tape & Reel packaging format. The number following (12 or 8) refers to the reel quantity. This is a packaging variant of the same electrical component. Electrical specifications remain identical to non-TR versions.

Q: Is 1N5368BRLG RoHS compliant?

A: Yes. 1N5368BRLG carries ROHS3 compliance certification. The original 1N5368BRL is RoHS non-compliant. For new designs subject to RoHS requirements, 1N5368BRLG is the appropriate choice.

Q: What is the operating temperature range difference between 1N5368BRL and 1N5368B?

A: 1N5368BRL specifies -65°C ~ 200°C, while 1N5368B specifies -65°C ~ 150°C. For applications requiring operation above 150°C, 1N5368BRL or 1N5368BRLG are required.

Q: Can I mix different tolerance grades in the same circuit?

A: This depends on circuit design. If your circuit requires consistent zener voltage regulation across multiple components, mixing tolerance grades (±5%, ±10%, ±20%) may introduce unacceptable voltage variation. Consult circuit design specifications.

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