1N4102-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N4102-TP is a through-hole zener diode manufactured by Micro Commercial Co, rated at 8.7 V nominal zener voltage with 500 mW power dissipation capability in a DO-35 package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part operates at a maximum junction temperature of 175°C and maintains ±5% voltage tolerance across its operating range. Substitute parts must maintain electrical equivalence in zener voltage, power rating, and mechanical compatibility while meeting current product availability and compliance requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	8.7	V
Tolerance	±5%	—
Power - Max	500	mW
Impedance (Max)	200	Ohms
Current - Reverse Leakage @ Vr	1	µA @ 6.61 V
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 200 mA
Operating Temperature (Max)	175	°C
Mounting Type	Through Hole	—
Package / Case	DO-204AH, DO-35, Axial	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the 1N4102-TP is determined by strict equivalence in the following electrical and mechanical parameters:

Critical Equivalence Parameters:

Voltage - Zener (Nom): 8.7 V (exact match required)
Power - Max: 500 mW (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: DO-35 or DO-204AH (mechanical compatibility required)
Tolerance: ±5% or tighter (±2% acceptable as superior specification)

Acceptable Variations:

Impedance (Max): Substitute parts may have lower impedance values (8 Ohms vs. 200 Ohms) as this represents improved performance
Current - Reverse Leakage: Substitute parts may have higher leakage (3 µA vs. 1 µA) within acceptable operating margins
Operating Temperature: Substitute parts may have extended temperature ranges (-65°C to 200°C vs. 175°C max) as this represents expanded capability
Product Status: Active substitute parts are preferred over obsolete status for long-term availability

All identified substitute parts maintain the required 8.7 V zener voltage, 500 mW power rating, DO-35 package format, and through-hole mounting configuration. Packaging format variations (Cut Tape, Bulk, Tape & Box, Tape & Reel) do not affect electrical or mechanical compatibility.

Parameter Comparison

Parameter	1N4102-TP (Main)	1N5238B TR PBFREE	1N5238B BK PBFREE	1N5238B-TAP	1N5238C-TAP	1N5238C-TR
Manufacturer	Micro Commercial Co	Central Semiconductor Corp	Central Semiconductor Corp	Vishay General Semiconductor	Vishay General Semiconductor	Vishay General Semiconductor
Voltage - Zener (Nom)	8.7 V	8.7 V	8.7 V	8.7 V	8.7 V	8.7 V
Tolerance	±5%	±5%	±5%	±5%	±2%	±2%
Power - Max	500 mW	500 mW	500 mW	500 mW	500 mW	500 mW
Impedance (Max)	200 Ohms	8 Ohms	8 Ohms	8 Ohms	8 Ohms	8 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 6.61 V	3 µA @ 6.5 V	3 µA @ 6.5 V	3 µA @ 6.5 V	3 µA @ 6.5 V	3 µA @ 6.5 V
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA	1.1 V @ 200 mA	1.1 V @ 200 mA	1.1 V @ 200 mA	1.1 V @ 200 mA	1.1 V @ 200 mA
Operating Temperature (Max)	175°C	200°C	200°C	175°C	175°C	175°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AH, DO-35	DO-204AH, DO-35	DO-204AH, DO-35	DO-204AH, DO-35	DO-204AH, DO-35	DO-204AH, DO-35
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	—	Cut Tape (CT)	Bulk	Cut Tape (CT)	Tape & Box (TB)	Tape & Reel (TR)
Inventory Status	866 Pcs	9950 Pcs	1082 Pcs	29796 Pcs	1035 Pcs	1099 Pcs

Engineering Selection Recommendations

Primary Substitute: 1N5238B-TAP

The 1N5238B-TAP manufactured by Vishay General Semiconductor is the recommended primary substitute for the 1N4102-TP. This part maintains exact electrical equivalence (8.7 V, 500 mW, ±5% tolerance) and mechanical compatibility (DO-35 through-hole package). The 1N5238B-TAP holds active product status with highest inventory availability (29,796 pcs), ensuring long-term procurement reliability. The part carries AEC-Q101 automotive qualification and ROHS3 compliance, matching the regulatory requirements of the original component. Operating temperature specification of 175°C aligns with the main part maximum rating.

Secondary Substitutes: 1N5238C-TAP and 1N5238C-TR

The 1N5238C variants from Vishay General Semiconductor provide superior tolerance specification (±2% vs. ±5%), representing tighter voltage control. Both parts maintain identical electrical performance at 8.7 V and 500 mW with DO-35 package compatibility. These parts carry AEC-Q101 automotive qualification and ROHS3 compliance. The 1N5238C-TAP is packaged in Tape & Box format with 1,035 pcs inventory, while 1N5238C-TR is supplied in Tape & Reel format with 1,099 pcs inventory. Selection between these variants depends on procurement packaging requirements.

Tertiary Substitutes: 1N5238B TR PBFREE and 1N5238B BK PBFREE

The Central Semiconductor Corp 1N5238B variants maintain electrical equivalence at 8.7 V and 500 mW with ±5% tolerance. These parts feature extended operating temperature range (-65°C to 200°C), providing enhanced thermal capability beyond the original specification. The 1N5238B TR PBFREE (Cut Tape format, 9,950 pcs) and 1N5238B BK PBFREE (Bulk format, 1,082 pcs) both carry ROHS3 compliance and REACH Unaffected status. Lower impedance specification (8 Ohms vs. 200 Ohms) and slightly higher reverse leakage (3 µA vs. 1 µA) remain within acceptable operating margins for zener diode applications.

Availability and Compliance Summary:

All substitute parts maintain ROHS3 compliance and are currently in active production status, eliminating obsolescence risk. Inventory levels across all substitutes exceed 1,000 units, supporting both prototype and production-volume requirements. Packaging format variations (Cut Tape, Bulk, Tape & Box, Tape & Reel) accommodate different assembly and procurement workflows without affecting electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can the 1N5238B-TAP directly replace the 1N4102-TP in existing circuit designs?

A: Yes. The 1N5238B-TAP maintains identical zener voltage (8.7 V), power rating (500 mW), tolerance (±5%), and DO-35 through-hole package configuration. Electrical performance and mechanical fit are equivalent. No circuit modifications are required.

Q: What is the difference between the 1N5238B and 1N5238C variants?

A: The primary difference is voltage tolerance specification. The 1N5238B maintains ±5% tolerance matching the original 1N4102-TP, while the 1N5238C provides tighter ±2% tolerance. Both variants are electrically and mechanically equivalent at 8.7 V and 500 mW. The 1N5238C is suitable for applications requiring stricter voltage control.

Q: Does packaging format (Cut Tape, Bulk, Tape & Box, Tape & Reel) affect electrical performance?

A: No. Packaging format variations address procurement and assembly logistics only. All packaging formats of equivalent part numbers deliver identical electrical specifications and performance characteristics. Selection depends on manufacturing process requirements and inventory management practices.

Q: Why do substitute parts show lower impedance (8 Ohms vs. 200 Ohms)?

A: Lower impedance represents improved dynamic performance and is not a limitation. Impedance specifications define maximum values; lower impedance indicates superior regulation characteristics. This variation does not affect circuit compatibility or functionality.

Q: Are the Central Semiconductor Corp and Vishay General Semiconductor substitutes interchangeable?

A: Yes, within the specified electrical parameters. Both manufacturers provide 8.7 V, 500 mW zener diodes in DO-35 packages with equivalent performance. Selection may depend on procurement availability, packaging format preference, or supply chain considerations. All parts maintain ROHS3 compliance and active product status.

Q: What is the significance of AEC-Q101 qualification on the Vishay parts?

A: AEC-Q101 qualification indicates the part meets automotive industry reliability and quality standards. This certification is not present on the original 1N4102-TP or Central Semiconductor variants, but does not affect general-purpose electronic applications. For automotive or mission-critical applications, AEC-Q101 qualified parts provide additional assurance.

Q: Can I use the extended temperature range versions (1N5238B TR PBFREE, -65°C to 200°C) in place of the original part rated to 175°C?

A: Yes. Extended temperature range represents expanded capability and does not create compatibility issues. The part will operate correctly within the original design temperature limits while providing additional margin for thermal extremes.

Q: How do I select between multiple substitute options?

A: Selection criteria are: (1) Product Status—all substitutes are active; (2) Inventory Availability—1N5238B-TAP offers highest stock (29,796 pcs); (3) Packaging Format—choose based on assembly requirements (Cut Tape, Bulk, Tape & Box, or Tape & Reel); (4) Tolerance—1N5238C variants offer ±2% if stricter voltage control is needed; (5) Manufacturer Preference—Vishay or Central Semiconductor based on supply chain relationships.

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