1N4700-TP Zener Diode 13V 500mW Equivalent & Substitute Parts

Part Overview

The 1N4700-TP is a through-hole zener diode rated at 13 V nominal with 500 mW power dissipation in a DO-35 package. Manufactured by Micro Commercial Co, this component is classified as obsolete. Due to its obsolete status and limited availability from the original manufacturer, equivalent substitute parts from active manufacturers are necessary to maintain design continuity and ensure long-term supply chain reliability. Substitute parts must maintain electrical equivalence across voltage rating, power rating, and package configuration while meeting current RoHS and REACH compliance requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	13	V
Power - Max	500	mW
Tolerance	±5%	-
Package / Case	DO-204AH, DO-35, Axial	-
Mounting Type	Through Hole	-
Current - Reverse Leakage @ Vr	50	nA @ 9.8 V
Voltage - Forward (Vf) (Max) @ If	1.5	V @ 100 mA
Operating Temperature	200	°C (TJ)
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the 1N4700-TP is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 13 V (exact match required)
Power - Max: 500 mW (equal or greater)
Package / Case: DO-204AH, DO-35, Axial (physical compatibility)
Mounting Type: Through Hole (assembly compatibility)
Tolerance: ±5% or tighter (electrical accuracy)

Secondary Compliance Criteria:

RoHS3 Compliance (regulatory requirement)
REACH Unaffected status (supply chain assurance)
Product Status: Active (availability assurance)

Substitute parts are grouped into two categories: Direct Equivalents (matching all primary criteria with ±5% tolerance) and Functional Equivalents (matching voltage and power with tighter tolerance or enhanced specifications). Parts with reduced power ratings (250 mW) are listed as functional alternatives only for applications where lower power dissipation is acceptable.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Power (Max)	Tolerance	Vf (Max) @ If	Ir @ Vr	Operating Temp	RoHS Status	Product Status
1N4700-TP	Micro Commercial Co	13 V	500 mW	±5%	1.5 V @ 100 mA	50 nA @ 9.8 V	200°C	ROHS3	Obsolete
1N4700 TR PBFREE	Central Semiconductor Corp	13 V	500 mW	±5%	1.5 V @ 100 mA	50 nA @ 9.8 V	-65°C ~ 200°C	ROHS3	Active
1N5243A	Microsemi Corporation	13 V	500 mW	±10%	1.5 V @ 200 mA	500 nA @ 9.9 V	-65°C ~ 175°C	ROHS3	Active
1N5243B	Microsemi Corporation	13 V	500 mW	±5%	1.5 V @ 200 mA	500 nA @ 9.9 V	-65°C ~ 175°C	RoHS non-compliant	Active
1N5243B-TR	Vishay General Semiconductor	13 V	500 mW	±5%	1.1 V @ 200 mA	500 nA @ 9.9 V	175°C	ROHS3	Active
1N717A	Microchip Technology	13 V	250 mW	±5%	-	-	-	RoHS non-compliant	Active
BZX55B13-TAP	Vishay General Semiconductor	13 V	500 mW	±2%	1.5 V @ 200 mA	100 nA @ 10 V	-65°C ~ 175°C	ROHS3	Active
BZX55B13-TR	Vishay General Semiconductor	13 V	500 mW	±2%	1.5 V @ 200 mA	100 nA @ 10 V	-65°C ~ 175°C	ROHS3	Active
TZX13A-TR	Vishay General Semiconductor	13 V	500 mW	-	1.5 V @ 200 mA	1 µA @ 10 V	-65°C ~ 175°C	ROHS3	Active
TZX13B-TAP	Vishay General Semiconductor	13 V	500 mW	-	1.5 V @ 200 mA	1 µA @ 10 V	-65°C ~ 175°C	ROHS3	Active
TZX13B-TR	Vishay General Semiconductor	13 V	500 mW	-	1.5 V @ 200 mA	1 µA @ 10 V	-65°C ~ 175°C	ROHS3	Active

Engineering Selection Recommendations

Tier 1 - Direct Equivalents (Recommended for Replacement):

The 1N4700 TR PBFREE from Central Semiconductor Corp is the primary direct equivalent. It maintains identical electrical specifications (13 V, 500 mW, ±5% tolerance) with extended operating temperature range (-65°C to 200°C) and active product status. ROHS3 compliance and REACH unaffected status ensure regulatory and supply chain continuity.

The 1N5243B-TR from Vishay General Semiconductor is a secondary direct equivalent with ±5% tolerance match, 500 mW power rating, and active status. This part offers superior forward voltage characteristics (1.1 V @ 200 mA) and is available in high inventory quantities (33,359 pcs). ROHS3 compliance and AEC-Q101 automotive qualification provide additional assurance.

Tier 2 - Functional Equivalents with Enhanced Specifications:

The BZX55B13-TR and BZX55B13-TAP from Vishay General Semiconductor provide tighter tolerance (±2%) and lower reverse leakage current (100 nA @ 10 V) compared to the original specification. Both maintain 13 V, 500 mW ratings with ROHS3 compliance and AEC-Q101 automotive qualification. Operating temperature range (-65°C to 175°C) is slightly reduced but remains suitable for most applications.

The TZX13A-TR, TZX13B-TAP, and TZX13B-TR from Vishay General Semiconductor maintain 13 V and 500 mW specifications with ROHS3 compliance and AEC-Q101 qualification. These parts feature higher impedance (35 Ohms) and elevated reverse leakage current (1 µA @ 10 V) but are suitable for applications where these characteristics are acceptable.

Tier 3 - Functional Alternatives (Limited Substitution):

The 1N717A from Microchip Technology is a functional alternative only for applications where 250 mW power dissipation is acceptable. This part is not recommended as a direct replacement due to reduced power rating and RoHS non-compliance.

The 1N5243A from Microsemi Corporation features ±10% tolerance, which exceeds the original ±5% specification. This part is suitable only for applications with relaxed voltage tolerance requirements.

Compliance Considerations:

Parts with RoHS non-compliant status (1N5243B, 1N717A) should be avoided in new designs or applications subject to RoHS3 regulatory requirements. All Tier 1 and Tier 2 recommendations maintain ROHS3 compliance and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can the 1N4700-TP be directly replaced with the 1N4700 TR PBFREE?

A: Yes. The 1N4700 TR PBFREE from Central Semiconductor Corp is a direct equivalent with identical electrical specifications (13 V, 500 mW, ±5% tolerance) and superior operating temperature range. The primary difference is packaging format (Tape & Reel vs. bulk) and active product status, making it the recommended replacement.

Q: What is the difference between the 1N5243B-TR and BZX55B13-TR?

A: Both parts maintain 13 V and 500 mW specifications with ROHS3 compliance. The BZX55B13-TR offers tighter tolerance (±2% vs. ±5%), lower reverse leakage current (100 nA vs. 500 nA), and higher impedance (26 Ohms vs. 13 Ohms). The 1N5243B-TR provides superior forward voltage performance (1.1 V @ 200 mA vs. 1.5 V @ 200 mA). Selection depends on application requirements for voltage accuracy and leakage characteristics.

Q: Are the TZX13 series parts suitable replacements?

A: The TZX13A-TR, TZX13B-TAP, and TZX13B-TR maintain 13 V and 500 mW specifications with ROHS3 compliance and AEC-Q101 automotive qualification. However, these parts feature higher reverse leakage current (1 µA @ 10 V) compared to the original specification (50 nA @ 9.8 V). They are suitable for applications where elevated leakage is acceptable.

Q: Why is the 1N717A not recommended as a direct replacement?

A: The 1N717A has a reduced power rating of 250 mW compared to the original 500 mW specification. This part is suitable only for applications where lower power dissipation is acceptable. Additionally, it carries RoHS non-compliant status, which may conflict with regulatory requirements in new designs.

Q: What packaging formats are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: Tape & Reel (TR), Cut Tape (CT), Tape & Box (TB), and Bulk. All maintain the same DO-35 axial through-hole package for PCB assembly compatibility. Selection of packaging format depends on production volume and assembly equipment requirements.

Q: Are all substitute parts AEC-Q101 qualified?

A: No. The BZX55B13-TAP, BZX55B13-TR, TZX13A-TR, TZX13B-TAP, and TZX13B-TR carry AEC-Q101 automotive qualification. The 1N4700 TR PBFREE, 1N5243A, 1N5243B, and 1N5243B-TR do not list AEC-Q101 qualification. Selection of AEC-Q101 qualified parts is required for automotive applications.

Q: Can the 1N5243A be used as a substitute despite ±10% tolerance?

A: The 1N5243A is suitable only for applications with relaxed voltage tolerance requirements. The ±10% tolerance specification exceeds the original ±5% tolerance, resulting in a maximum zener voltage deviation of ±1.3 V from the 13 V nominal. Applications requiring tighter voltage regulation should use parts with ±5% or ±2% tolerance.

Q: What is the inventory status of recommended substitutes?

A: The 1N5243B-TR from Vishay General Semiconductor has the highest inventory availability (33,359 pcs). The BZX55B13-TR also maintains substantial inventory (30,108 pcs). The 1N4700 TR PBFREE from Central Semiconductor Corp has 1,077 pcs available. Inventory levels should be verified with suppliers for long-term procurement planning.

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