1N5232B A0G Equivalent & Substitute Parts

Part Overview

The 1N5232B A0G is a Zener diode rated at 5.6 V nominal voltage with 500 mW power dissipation capacity, manufactured by Taiwan Semiconductor Corporation. This through-hole component in DO-35 package is designed for voltage regulation and protection applications in electronic circuits. The part is currently active in production with 1075 units in stock. Equivalent and substitute parts are identified to provide design flexibility, support supply chain continuity, and accommodate specific application requirements such as operating temperature range, tolerance specifications, or packaging preferences.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	5.6	V
Tolerance	±5%	-
Power - Max	500	mW
Impedance (Max)	11	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 3 V
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 200 mA
Operating Temperature	100	°C (TJ)
Mounting Type	Through Hole	-
Package / Case	DO-204AH, DO-35, Axial	-
RoHS Status	ROHS3 Compliant	-
REACH Status	REACH Unaffected	-

Substitute Part Grouping Explanation

Substitute parts for the 1N5232B A0G are classified based on electrical parameter compatibility and mechanical interchangeability. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage - Zener (Nom): 5.6 V (exact match required)
Power - Max: 500 mW (exact match required)
Tolerance: ±5% or tighter (±5% acceptable; ±10% represents relaxed tolerance)
Mounting Type: Through Hole (required for mechanical compatibility)
Package / Case: DO-35 or DO-204AH (physically interchangeable)

Secondary Parameters Affecting Substitution:

Impedance (Max): Ranges from 11 Ohms to 40 Ohms across alternatives
Current - Reverse Leakage @ Vr: Ranges from 1 µA to 5 µA
Voltage - Forward (Vf) (Max) @ If: Ranges from 1.1 V to 1.5 V
Operating Temperature: Ranges from -65°C ~ 175°C to -65°C ~ 200°C
RoHS Status: ROHS3 Compliant or non-compliant variants available

Substitution Categories:

Direct Equivalents (identical electrical and mechanical specifications):

1N5232B (Microchip Technology)
1N5232BTR (Fairchild Semiconductor)

Similar Equivalents (same core voltage and power, minor parameter variations):

1N5232A (DO-35)TR (Microsemi Corporation) – tolerance ±10%
BZX79C5V6 (Taiwan Semiconductor Corporation) – impedance 40 Ohms
BZX79C5V6-T50A (Fairchild Semiconductor) – impedance 40 Ohms
BZX79C5V6TR (Fairchild Semiconductor) – impedance 40 Ohms

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Vf (Max) @ If	Temp Range	RoHS Status
1N5232B A0G	Taiwan Semiconductor	5.6 V	±5%	500 mW	11 Ω	1.1 V @ 200 mA	100°C (TJ)	ROHS3 Compliant
1N5232B	Microchip Technology	5.6 V	±5%	500 mW	11 Ω	1.5 V @ 200 mA	-65°C ~ 175°C	RoHS non-compliant
1N5232BTR	Fairchild Semiconductor	5.6 V	±5%	500 mW	11 Ω	1.2 V @ 200 mA	-65°C ~ 200°C	Not specified
1N5232A (DO-35)TR	Microsemi Corporation	5.6 V	±10%	500 mW	11 Ω	1.5 V @ 200 mA	-65°C ~ 175°C	ROHS3 Compliant
BZX79C5V6	Taiwan Semiconductor	5.6 V	±5%	500 mW	40 Ω	1.5 V @ 100 mA	-65°C ~ 175°C	ROHS3 Compliant
BZX79C5V6-T50A	Fairchild Semiconductor	5.6 V	±5%	500 mW	40 Ω	1.5 V @ 100 mA	-65°C ~ 200°C	Not specified
BZX79C5V6TR	Fairchild Semiconductor	5.6 V	±5%	500 mW	40 Ω	1.5 V @ 100 mA	-65°C ~ 200°C	Not specified

Engineering Selection Recommendations

For RoHS3 Compliance Requirements: Select 1N5232B A0G (original), 1N5232A (DO-35)TR, or BZX79C5V6. These parts carry explicit ROHS3 Compliant certification. The 1N5232B A0G and BZX79C5V6 are both manufactured by Taiwan Semiconductor Corporation and maintain identical RoHS compliance status.

For Extended Operating Temperature Range: Select 1N5232BTR, BZX79C5V6-T50A, or BZX79C5V6TR for applications requiring -65°C ~ 200°C operation. These parts provide the widest temperature specification. The 1N5232BTR and BZX79C5V6-T50A are both manufactured by Fairchild Semiconductor.

For Tighter Tolerance Specification: Select parts with ±5% tolerance: 1N5232B A0G, 1N5232B (Microchip), 1N5232BTR, BZX79C5V6, BZX79C5V6-T50A, or BZX79C5V6TR. The 1N5232A (DO-35)TR carries ±10% tolerance and is suitable only when relaxed tolerance is acceptable.

For Impedance-Sensitive Applications: The 1N5232B A0G, 1N5232B (Microchip), and 1N5232BTR specify 11 Ohms maximum impedance. The BZX79C5V6 series specifies 40 Ohms maximum impedance. Select based on circuit impedance requirements.

For Supply Chain Continuity: BZX79C5V6TR (Fairchild Semiconductor) maintains the highest inventory at 65,799 units. BZX79C5V6-T50A (Fairchild Semiconductor) provides 46,079 units. BZX79C5V6 (Taiwan Semiconductor Corporation) provides 34,400 units.

Frequently Asked Questions (FAQ)

Q: Can 1N5232B from Microchip Technology directly replace 1N5232B A0G from Taiwan Semiconductor Corporation?

A: Both parts share identical voltage (5.6 V), tolerance (±5%), power (500 mW), impedance (11 Ohms), and package specifications (DO-35). The Microchip variant specifies forward voltage of 1.5 V @ 200 mA versus 1.1 V @ 200 mA for the original, and operates across -65°C ~ 175°C versus 100°C (TJ) for the original. The Microchip part is RoHS non-compliant while the original is ROHS3 Compliant. Substitution is electrically feasible but requires verification of RoHS compliance requirements for the application.

Q: What is the difference between 1N5232B and BZX79C5V6 series parts?

A: Both series maintain 5.6 V nominal voltage, ±5% tolerance, and 500 mW power rating. The primary difference is impedance: 1N5232B series specifies 11 Ohms maximum impedance, while BZX79C5V6 series specifies 40 Ohms maximum impedance. Forward voltage specifications also differ: 1N5232B series at 1.1–1.5 V @ 200 mA versus BZX79C5V6 series at 1.5 V @ 100 mA. Reverse leakage current differs: 1N5232B series at 5 µA @ 3 V versus BZX79C5V6 series at 1 µA @ 2 V. Selection depends on circuit impedance and leakage current requirements.

Q: Is 1N5232A (DO-35)TR compatible with applications requiring ±5% tolerance?

A: No. The 1N5232A (DO-35)TR specifies ±10% tolerance, which is wider than the ±5% tolerance of the 1N5232B A0G. This part is suitable only for applications where ±10% tolerance is acceptable. For applications requiring ±5% tolerance, select 1N5232B A0G, 1N5232B (Microchip), 1N5232BTR, or any BZX79C5V6 variant.

Q: Can I use BZX79C5V6 in place of 1N5232B A0G in a temperature-sensitive application?

A: BZX79C5V6 operates across -65°C ~ 175°C, which is wider than the 100°C (TJ) specification of 1N5232B A0G. However, the impedance specification differs (40 Ohms versus 11 Ohms) and reverse leakage current differs (1 µA @ 2 V versus 5 µA @ 3 V). Substitution is feasible for applications where higher impedance and lower leakage current are acceptable or beneficial.

Q: Which substitute part offers the best inventory availability?

A: BZX79C5V6TR (Fairchild Semiconductor) provides the highest inventory at 65,799 units in stock. This part maintains 5.6 V nominal voltage, ±5% tolerance, 500 mW power, and operates across -65°C ~ 200°C. The primary difference from the original is 40 Ohms impedance specification versus 11 Ohms.

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

A: Yes. All listed substitute parts are specified for DO-35 package or DO-204AH (which is the formal designation for DO-35). All parts are through-hole mounted and mechanically interchangeable in standard DO-35 footprints.

Q: What is the impact of forward voltage differences between substitute parts?

A: Forward voltage (Vf) specifications range from 1.1 V to 1.5 V across the substitute parts. In forward-biased operation, higher forward voltage results in greater voltage drop across the diode. For applications where the diode operates primarily in reverse-bias (voltage regulation mode), forward voltage has minimal impact. For applications involving forward current conduction, forward voltage differences may affect circuit performance and should be evaluated against specific application requirements.

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