Equivalent & Substitute Parts for 1N970A Zener Diode

Part Overview

The 1N970A is a Zener Diode with nominal specifications of 24 V Zener voltage and 500 mW maximum power dissipation in a DO-7 through-hole package. This product is currently active and available in inventory. Sourcing alternative models becomes necessary due to considerations such as differing manufacturer preferences, compliance requirements, or inventory levels. Substitute parts must meet strict equivalency on electrical parameters and package format.

Key Parameters

Parameter	1N970A
Manufacturer Part Number	1N970A
Manufacturer	Microchip Technology
Category	Diodes, Zener
Description	DIODE ZENER 24V 500MW DO7
Detailed Description	Zener Diode 24 V 500 mW ±10% Through Hole DO-7
Product Status	Active
Voltage - Zener (Nom) (Vz)	24 V
Tolerance	±10%
Power - Max	500 mW
Impedance (Max) (Zzt)	33 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 18.2 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA
Operating Temperature	-65°C ~ 175°C
Mounting Type	Through Hole
Package / Case	DO-204AA, DO-7, Axial
Supplier Device Package	DO-7
RoHS Status	RoHS non-compliant
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8541.10.0050

Substitute Part Grouping Explanation

Substitute parts for the 1N970A Zener Diode are grouped strictly by the following allowed parameters:

Zener Voltage (Nominal Vz)
Tolerance
Maximum Power Dissipation
Reverse Leakage Current
Package Type and Mounting Configuration
Operating Temperature Only those devices that match or are compatible within these specified parameters are listed as substitutes.

Parameter Comparison

Parameter	1N970A	BZX79-B24,113
Manufacturer Part Number	1N970A	BZX79-B24,113
Manufacturer	Microchip Technology	NXP USA Inc.
Category	Diodes, Zener	Diodes, Zener
Voltage - Zener (Nom) (Vz)	24 V	24 V
Tolerance	±10%	±2%
Power - Max	500 mW	400 mW
Impedance (Max) (Zzt)	33 Ohms	70 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 18.2 V	50 nA @ 16.8 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA	900 mV @ 10 mA
Operating Temperature	-65°C ~ 175°C	-65°C ~ 200°C
Mounting Type	Through Hole	Through Hole
Package / Case	DO-204AA, DO-7, Axial	DO-204AH, DO-35, Axial
Supplier Device Package	DO-7	ALF2
Product Status	Active	Active
ECCN	EAR99	EAR99
HTSUS	8541.10.0050	8541.10.0050

Engineering Selection Recommendations

The 1N970A and its substitute BZX79-B24,113 are both listed as active components, ensuring continued availability. The 1N970A is RoHS non-compliant, while BZX79-B24,113 does not include specified RoHS information in the provided parameters. Both are REACH unaffected and share the same ECCN and HTSUS codes. Selection should consider product status and compliance requirements as stated.

Frequently Asked Questions (FAQ)

Q1: Which electrical parameters must match for substitution among Zener diodes in this category?
A1: Voltage - Zener (Nom), Tolerance, Maximum Power Dissipation, Impedance (Max), Reverse Leakage Current, Voltage - Forward, and Operating Temperature.

Q2: Are the packages interchangeable between the 1N970A and BZX79-B24,113?
A2: Both parts provide through-hole mounting with axial packages DO-7 and DO-35, respectively. Package dimensions and device handling guidelines must be observed as per provided data.

Q3: Does RoHS status impact substitution selection between 1N970A and BZX79-B24,113?
A3: The 1N970A is RoHS non-compliant; no RoHS status is specified for BZX79-B24,113 in this input. Selection must be based on your application's compliance requirements.

Q4: Are operating temperature ranges compatible for these parts?
A4: Both devices support an operating temperature starting from -65°C, with 1N970A up to 175°C and BZX79-B24,113 up to 200°C.

Q5: Are the diodes suitable for direct replacement in existing designs?
A5: Compatibility is determined strictly by matching the specified Zener voltage, tolerance, power rating, package type, and operational limits per provided data.

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