1N5230B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5230B-TP is a 4.7 V, 500 mW Zener diode manufactured by Micro Commercial Co in DO-35 through-hole package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design support and procurement. The 1N5230B-TP serves voltage regulation and protection applications requiring precise 4.7 V Zener characteristics with 500 mW power dissipation capability.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	4.7	V
Tolerance	±5%	%
Power - Max	500	mW
Impedance (Max)	19	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 2 V
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 200 mA
Operating Temperature	-55 to 150	°C
Mounting Type	Through Hole
Package / Case	DO-35

Substitute Part Grouping Explanation

Substitution of the 1N5230B-TP is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 4.7 V
Tolerance: ±5%
Power - Max: 500 mW
Impedance (Max): 19 Ohms
Mounting Type: Through Hole
Package / Case: DO-35

Substitution Categories:

Direct Equivalents maintain all primary electrical parameters and package specifications. These parts are functionally interchangeable with the 1N5230B-TP.

Upgrade Equivalents provide identical electrical performance with enhanced operating temperature ranges or improved compliance status. These parts exceed the original specifications while maintaining core functionality.

Similar Parts share the same Zener voltage and package but differ in power rating or other secondary parameters. These require application-level verification of power dissipation requirements.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Vf @ 200mA (V)	Temp Range (°C)	Packaging	Status	RoHS
1N5230B-TP	Micro Commercial Co	4.7	±5%	500	19	1.1	-55 to 150	DO-35	Obsolete	ROHS3
1N5230B TR PBFREE	Central Semiconductor Corp	4.7	±5%	500	19	1.1	-65 to 200	DO-35 (CT)	Active	ROHS3
1N5230B BK TIN/LEAD	Central Semiconductor Corp	4.7	±5%	500	19	1.1	-65 to 200	DO-35 (Bulk)	Active	Non-compliant
1N750A BK PBFREE	Central Semiconductor Corp	4.7	±5%	500	19	1.5	-65 to 200	DO-35 (Bulk)	Active	ROHS3
1N750A TR PBFREE	Central Semiconductor Corp	4.7	±5%	500	19	1.5	-65 to 200	DO-35 (CT)	Active	ROHS3
1N5230B	Microchip Technology	4.7	±5%	500	19	1.5	-65 to 175	DO-35 (Bulk)	Active	Non-compliant
1N5230BTR	Fairchild Semiconductor	4.7	±5%	500	19	1.2	-65 to 200	DO-35	Active	Not specified
1N4624 TR PBFREE	Central Semiconductor Corp	4.7	±5%	250	1550	1.0	-65 to 200	DO-35 (CT)	Active	Request verification

Engineering Selection Recommendations

For Direct Replacement (Active Status, ROHS3 Compliant):

The 1N5230B TR PBFREE from Central Semiconductor Corp provides direct electrical equivalence to the 1N5230B-TP with active product status and ROHS3 compliance. This part maintains identical Zener voltage, tolerance, power rating, and impedance specifications while offering extended operating temperature range (-65°C to 200°C) and lead-free construction. Cut tape packaging is suitable for automated assembly processes.

For Upgrade Applications (Extended Temperature Range):

The 1N750A TR PBFREE and 1N750A BK PBFREE from Central Semiconductor Corp offer identical core electrical specifications with active status and ROHS3 compliance. These parts provide the same 4.7 V Zener voltage and 500 mW power rating across the full -65°C to 200°C operating range. The TR PBFREE variant in cut tape packaging supports high-volume production environments.

For Bulk Procurement (Non-Compliant Applications):

The 1N5230B BK TIN/LEAD from Central Semiconductor Corp maintains full electrical equivalence in bulk packaging format. This option is suitable for applications where RoHS compliance is not required. The part delivers identical performance across -65°C to 200°C operating temperature.

For Alternative Sourcing (Active Status):

The 1N5230BTR from Fairchild Semiconductor provides electrical equivalence with active product status and extended temperature range (-65°C to 200°C). This part maintains 4.7 V Zener voltage, 500 mW power rating, and 19 Ohm impedance specifications.

The 1N5230B from Microchip Technology offers active status with identical electrical specifications. Operating temperature range extends to -65°C to 175°C. RoHS compliance status is non-compliant.

For Reduced Power Applications (Similar Specification):

The 1N4624 TR PBFREE from Central Semiconductor Corp shares the 4.7 V Zener voltage and DO-35 package but provides 250 mW power rating. This part is suitable only for applications where maximum power dissipation does not exceed 250 mW. Impedance specification differs significantly at 1550 Ohms.

Frequently Asked Questions (FAQ)

Q: Can the 1N5230B TR PBFREE directly replace the 1N5230B-TP?

A: Yes. The 1N5230B TR PBFREE maintains identical Zener voltage (4.7 V), tolerance (±5%), power rating (500 mW), and impedance (19 Ohms) specifications. Both use DO-35 through-hole packaging. The substitute offers extended operating temperature range and active product status.

Q: What is the difference between 1N5230B and 1N750A variants?

A: Both maintain identical Zener voltage (4.7 V), tolerance (±5%), power rating (500 mW), and impedance (19 Ohms). The 1N750A series exhibits lower reverse leakage current (2 µA @ 1 V versus 5 µA @ 2 V) and higher forward voltage (1.5 V @ 200 mA versus 1.1 V @ 200 mA). Both operate across -65°C to 200°C.

Q: Is the 1N4624 TR PBFREE suitable as a substitute?

A: The 1N4624 TR PBFREE shares the 4.7 V Zener voltage and DO-35 package but provides only 250 mW power rating compared to 500 mW. This part is suitable only for applications where power dissipation requirements do not exceed 250 mW. Impedance specification is significantly higher at 1550 Ohms.

Q: What packaging options are available for active equivalents?

A: Active equivalents are available in cut tape (CT) packaging for automated assembly and bulk packaging for manual assembly or reel applications. The 1N5230B TR PBFREE and 1N750A TR PBFREE are supplied in cut tape format. The 1N5230B BK TIN/LEAD and 1N750A BK PBFREE are supplied in bulk format.

Q: Are there RoHS compliance differences between substitutes?

A: Yes. The 1N5230B TR PBFREE and 1N750A variants (both TR and BK PBFREE) are ROHS3 compliant. The 1N5230B BK TIN/LEAD is RoHS non-compliant. The Microchip 1N5230B is RoHS non-compliant. Select ROHS3 compliant variants for applications requiring environmental compliance.

Q: What is the operating temperature advantage of upgrade equivalents?

A: The original 1N5230B-TP operates from -55°C to 150°C. Active equivalents including 1N5230B TR PBFREE, 1N750A variants, and 1N5230BTR extend the operating range to -65°C to 200°C, providing 15°C lower minimum temperature and 50°C higher maximum temperature capability.

Q: Can I use Microchip 1N5230B as a substitute?

A: The Microchip 1N5230B maintains identical electrical specifications (4.7 V, 500 mW, 19 Ohm impedance) and active product status. Operating temperature range is -65°C to 175°C. RoHS compliance status is non-compliant. This part is suitable for applications where RoHS compliance is not required.

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