BZX79C47 Equivalent & Substitute Parts

Part Overview

The BZX79C47 is a 47 V, 500 mW Zener diode manufactured by onsemi in a through-hole DO-35 package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The BZX79C47 operates across a temperature range of -65°C to 200°C with ±5% voltage tolerance and is suitable for voltage regulation and protection applications in electronic circuits.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	47 V
Tolerance	±5%
Power - Max	500 mW
Impedance (Max)	170 Ohms
Operating Temperature Range	-65°C to 200°C
Mounting Type	Through Hole
Package / Case	DO-204AH, DO-35, Axial

Substitute Part Grouping Explanation

Substitution of the BZX79C47 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Zener voltage (Nom): 47 V
Voltage tolerance: ±5% or tighter
Power dissipation: 500 mW or greater
Impedance (Max): 170 Ohms or lower
Operating temperature range: -65°C minimum and 200°C maximum (or compatible subset)

Mechanical Compatibility Criteria:

Mounting type: Through Hole
Package / Case: DO-204AH, DO-35, or Axial

Substitute parts are grouped into two categories:

Direct Substitutes (NXP Semiconductors BZX79-C47 Series): Parts BZX79-C47,113 and BZX79-C47,143 share identical zener voltage, tolerance, impedance, and package specifications. These parts operate at 400 mW maximum power, which is lower than the original 500 mW specification but remain functionally compatible for applications not requiring full power dissipation capacity.

Similar Substitutes (Microchip Technology and Microsemi Corporation): Parts 1N3534A, 1N5261B, 1N5752B, 1N5752C, 1N5752D, 1N6016A, 1N6016B, and 1N6016C meet or exceed the electrical and mechanical requirements. These parts maintain 47 V zener voltage, 500 mW power rating, and through-hole DO-35 packaging. Variations in tolerance (±1%, ±2%, ±5%, ±10%), impedance, and maximum operating temperature exist but do not prevent substitution when application requirements are met.

Parameter Comparison

Part Number	Manufacturer	Voltage - Zener (Nom)	Tolerance	Power - Max	Impedance (Max)	Operating Temp Range	Product Status
BZX79C47	onsemi	47 V	±5%	500 mW	170 Ohms	-65°C to 200°C	Obsolete
BZX79-C47,113	NXP Semiconductors	47 V	±5%	400 mW	170 Ohms	-65°C to 200°C	Active
BZX79-C47,143	NXP Semiconductors	47 V	±5%	400 mW	170 Ohms	-65°C to 200°C	Active
1N3534A	Microchip Technology	47 V	±5%	500 mW	150 Ohms	-65°C to 175°C	Active
1N5261B (DO-35)	Microsemi Corporation	47 V	±5%	500 mW	105 Ohms	-65°C to 175°C	Active
1N5752B	Microchip Technology	47 V	±5%	500 mW	170 Ohms	-65°C to 175°C	Active
1N5752C	Microchip Technology	47 V	±1%	500 mW	170 Ohms	-65°C to 175°C	Active
1N5752D	Microchip Technology	47 V	±1%	500 mW	170 Ohms	-65°C to 175°C	Active
1N6016A	Microchip Technology	47 V	±10%	500 mW	200 Ohms	-65°C to 175°C	Active
1N6016B	Microchip Technology	47 V	±5%	500 mW	170 Ohms	-65°C to 175°C	Active
1N6016C	Microchip Technology	47 V	±2%	500 mW	170 Ohms	-65°C to 175°C	Active

Engineering Selection Recommendations

For Direct Replacement with Active Product Status:

The BZX79-C47,113 and BZX79-C47,143 from NXP Semiconductors are direct electrical and mechanical equivalents with active product status. Both parts maintain the full operating temperature range of -65°C to 200°C, matching the original BZX79C47 specification. The 400 mW power rating is lower than the original 500 mW; however, these parts are suitable for applications where power dissipation does not exceed 400 mW. Both parts carry REACH Unaffected status and are available in high inventory quantities (308,955 and 176,005 units respectively).

For Full Electrical Equivalence with Extended Availability:

The Microchip Technology 1N5752B, 1N5752C, and 1N5752D maintain the 500 mW power rating and 47 V zener voltage with ±5% or tighter tolerance. These parts operate across -65°C to 175°C, which covers the lower portion of the original temperature range. The 1N5752C and 1N5752D offer ±1% tolerance for applications requiring tighter voltage regulation. All three parts are active products with substantial inventory availability (944 to 974 units).

For Tighter Voltage Tolerance Requirements:

The 1N5752C and 1N5752D (±1% tolerance) and 1N6016C (±2% tolerance) provide superior voltage accuracy compared to the original ±5% specification. These parts are suitable for precision voltage reference and regulation circuits where tighter tolerance is beneficial.

For Lower Impedance Applications:

The 1N5261B from Microsemi Corporation offers the lowest maximum impedance at 105 Ohms, compared to 170 Ohms in the original part. This characteristic is advantageous in applications requiring faster transient response or lower output impedance.

All substitute parts listed are active products with REACH Unaffected status and carry the same ECCN (EAR99) and HTSUS (8541.10.0050) classifications as the original BZX79C47.

Frequently Asked Questions (FAQ)

Q: Can I use BZX79-C47,113 or BZX79-C47,143 as a direct replacement for BZX79C47?

A: Yes. Both NXP parts are electrically and mechanically compatible. They maintain 47 V zener voltage, ±5% tolerance, 170 Ohms maximum impedance, and the full -65°C to 200°C operating temperature range. The 400 mW power rating is lower than the original 500 mW; applications must not exceed 400 mW dissipation.

Q: What is the difference between 1N5752B, 1N5752C, and 1N5752D?

A: All three parts share identical electrical specifications except for voltage tolerance. 1N5752B carries ±5% tolerance, matching the original BZX79C47. 1N5752C and 1N5752D both carry ±1% tolerance, providing tighter voltage regulation. All three maintain 500 mW power rating and 170 Ohms impedance.

Q: Why do some substitute parts have a lower maximum operating temperature (175°C vs. 200°C)?

A: The original BZX79C47 specifies -65°C to 200°C operation. Most substitute parts from Microchip Technology and Microsemi Corporation specify -65°C to 175°C. This difference does not prevent substitution in applications operating below 175°C. Applications requiring operation above 175°C must use BZX79-C47,113, BZX79-C47,143, or confirm the original BZX79C47 is still available.

Q: Are all substitute parts available in DO-35 package?

A: Yes. All substitute parts listed are available in DO-35 through-hole axial package, maintaining mechanical compatibility with the original BZX79C47.

Q: What is the difference between 1N6016A, 1N6016B, and 1N6016C?

A: These parts differ in voltage tolerance and impedance. 1N6016A carries ±10% tolerance with 200 Ohms maximum impedance. 1N6016B carries ±5% tolerance with 170 Ohms impedance, matching the original specification. 1N6016C carries ±2% tolerance with 170 Ohms impedance. All three maintain 500 mW power rating and -65°C to 175°C operating range.

Q: Can I substitute a part with lower impedance (e.g., 1N5261B at 105 Ohms) for the original 170 Ohms specification?

A: Yes. Lower impedance is a beneficial characteristic that does not prevent substitution. Lower impedance provides faster transient response and reduced output impedance, which are advantageous in most applications.

Q: Which substitute part offers the best voltage accuracy?

A: The 1N5752C and 1N5752D both offer ±1% voltage tolerance, providing superior accuracy compared to the original ±5% specification. These parts are suitable for precision voltage regulation applications.

Q: Are all substitute parts RoHS compliant?

A: The NXP Semiconductors BZX79-C47,113 and BZX79-C47,143 do not specify RoHS status in the provided data. Microchip Technology and Microsemi Corporation substitute parts are listed as RoHS non-compliant. Compliance requirements should be confirmed with the specific application and regulatory framework.

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