1N4701-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N4701-TP is a 14 V, 500 mW Zener diode manufactured by Micro Commercial Co in DO-35 axial package configuration. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design and procurement requirements. The 1N4701-TP operates at a maximum junction temperature of 200°C and maintains ±5% voltage tolerance with 50 nA reverse leakage current at 10.6 V.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	14	V
Tolerance	±5%	-
Power - Max	500	mW
Current - Reverse Leakage @ Vr	50	nA @ 10.6 V
Voltage - Forward (Vf) (Max) @ If	1.5	V @ 100 mA
Operating Temperature (TJ)	200	°C
Mounting Type	Through Hole	-
Package / Case	DO-204AH, DO-35, Axial	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the 1N4701-TP is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 14 V (exact match required)
Power - Max: 500 mW (exact match required)
Package / Case: DO-204AH, DO-35, Axial (mechanical compatibility)
Mounting Type: Through Hole (assembly compatibility)
RoHS Status: ROHS3 Compliant (regulatory compliance)

Secondary Compatibility Factors:

Tolerance: ±5% or tighter (±2% acceptable as superior specification)
Current - Reverse Leakage: 50 nA or lower (lower values acceptable)
Voltage - Forward (Vf): 1.5 V or lower at specified current (lower values acceptable)
Operating Temperature: 200°C or higher (higher values acceptable)

Substitute parts are classified as Direct when all primary criteria match exactly, and Similar when tolerance or temperature specifications exceed the original part requirements while maintaining functional equivalence.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vz (V)	Tolerance	Power (mW)	Reverse Leakage (nA)	Vf Max (V)	Operating Temp (°C)	Package	RoHS
1N4701-TP	Micro Commercial Co	Obsolete	14	±5%	500	50 @ 10.6 V	1.5 @ 100 mA	200	DO-35	ROHS3
1N4701 TR PBFREE	Central Semiconductor Corp	Active	14	±5%	500	50 @ 10.6 V	1.5 @ 100 mA	-65 ~ 200	DO-35	ROHS3
1N5244B OPAQUE BK	Central Semiconductor Corp	Active	14	±5%	500	100 @ 10 V	1.1 @ 200 mA	-65 ~ 200	DO-35	ROHS3
1N5244B OPAQUE TR	Central Semiconductor Corp	Active	14	±5%	500	100 @ 10 V	1.1 @ 200 mA	-65 ~ 200	DO-35	ROHS3
1N5244B-TAP	Vishay General Semiconductor	Active	14	±5%	500	100 @ 10 V	1.1 @ 200 mA	175	DO-35	ROHS3
1N5244B-TR	Vishay General Semiconductor	Active	14	±5%	500	100 @ 10 V	1.1 @ 200 mA	-	DO-35	ROHS3
1N5244C-TAP	Vishay General Semiconductor	Active	14	±2%	500	100 @ 10 V	1.1 @ 200 mA	175	DO-35	ROHS3

Engineering Selection Recommendations

Direct Equivalent (Preferred for Drop-In Replacement):

The 1N4701 TR PBFREE manufactured by Central Semiconductor Corp is the direct functional equivalent. This part maintains identical electrical specifications (14 V, ±5%, 500 mW, 50 nA reverse leakage) and package configuration. The part is active with extended operating temperature range (-65°C to 200°C) and ROHS3 compliance. Tape & Reel packaging provides automated assembly compatibility.

Active Substitutes (Functionally Compatible):

The 1N5244B series (OPAQUE BK, OPAQUE TR, and Vishay variants 1N5244B-TAP, 1N5244B-TR) are functionally compatible substitutes. These parts maintain the 14 V nominal voltage and 500 mW power rating with ±5% tolerance. The 1N5244B variants exhibit lower forward voltage (1.1 V @ 200 mA versus 1.5 V @ 100 mA) and higher reverse leakage (100 nA @ 10 V versus 50 nA @ 10.6 V), representing acceptable performance variations within the zener diode category. All variants are active products with ROHS3 compliance.

Enhanced Tolerance Option:

The 1N5244C-TAP manufactured by Vishay provides tighter voltage tolerance (±2% versus ±5%), automotive-grade qualification (AEC-Q101), and active product status. This part is suitable for applications requiring enhanced voltage accuracy while maintaining all other electrical and mechanical compatibility parameters.

Packaging Considerations:

Central Semiconductor 1N4701 TR PBFREE: Tape & Reel (TR) packaging
Central Semiconductor 1N5244B variants: Bulk or Tape & Reel options
Vishay 1N5244B-TAP: Cut Tape (CT) packaging
Vishay 1N5244C-TAP: Tape & Box (TB) packaging

Selection between packaging formats depends on assembly process requirements and procurement volume specifications.

Frequently Asked Questions (FAQ)

Q: Can the 1N4701 TR PBFREE directly replace the obsolete 1N4701-TP?

A: Yes. The 1N4701 TR PBFREE is a direct equivalent with identical electrical specifications (14 V, ±5%, 500 mW) and DO-35 package configuration. The part is manufactured by Central Semiconductor Corp and maintains active product status with ROHS3 compliance.

Q: What is the functional difference between the 1N4701-TP and 1N5244B series?

A: Both maintain 14 V nominal voltage and 500 mW power rating. The 1N5244B series exhibits lower forward voltage (1.1 V @ 200 mA) and higher reverse leakage current (100 nA @ 10 V) compared to the 1N4701-TP specifications. These differences are within acceptable zener diode performance variation and do not prevent functional substitution in standard voltage regulation applications.

Q: Is the 1N5244C-TAP suitable for applications requiring tighter voltage tolerance?

A: Yes. The 1N5244C-TAP provides ±2% voltage tolerance compared to ±5% for the 1N4701-TP. This enhanced tolerance specification is suitable for applications with stricter voltage regulation requirements. The part maintains 14 V nominal voltage, 500 mW power rating, and DO-35 package compatibility.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: Tape & Reel (TR) for automated assembly, Cut Tape (CT) for semi-automated processes, and Tape & Box (TB) for manual assembly. Selection depends on production volume and assembly equipment compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (1N4701 TR PBFREE, 1N5244B variants, and 1N5244C-TAP) maintain ROHS3 compliance, ensuring regulatory compatibility with current environmental standards.

Q: Does the 1N5244B-TAP automotive qualification affect its use in non-automotive applications?

A: No. Automotive qualification (AEC-Q101) indicates enhanced reliability testing and quality assurance. Parts with automotive qualification are suitable for all application categories, including non-automotive designs, and represent equivalent or superior quality specifications.

Q: What is the inventory availability for substitute parts?

A: Current inventory levels vary: 1N4701 TR PBFREE (1164 pcs), 1N5244B OPAQUE BK (688 pcs), 1N5244B OPAQUE TR (904 pcs), 1N5244B-TAP (30599 pcs), 1N5244B-TR (7324 pcs), and 1N5244C-TAP (1102 pcs). The 1N5244B-TAP from Vishay maintains the highest inventory availability.

Q: Can the 1N5244C-TAP with ±2% tolerance be used interchangeably with ±5% tolerance parts?

A: Yes. The ±2% tolerance specification is tighter than the ±5% requirement, making the 1N5244C-TAP functionally compatible with applications designed for ±5% tolerance zener diodes. The enhanced tolerance provides superior voltage regulation accuracy without compromising compatibility.

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