1N5265B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5265B-TP is a 62 V, 500 mW Zener diode manufactured by Micro Commercial Co in a DO-35 axial through-hole package. This component is classified as obsolete, indicating discontinued production and limited availability from original sources. The 1N5265B-TP remains functional for existing applications but requires identification of active substitute components for new designs and replenishment of inventory. Substitute parts must maintain electrical equivalence across voltage regulation, power dissipation, and thermal characteristics while accommodating packaging and sourcing constraints.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	62	V
Tolerance	±5	%
Power - Maximum	500	mW
Impedance (Maximum)	185	Ohms
Current - Reverse Leakage @ Vr	100 nA @ 47 V	nA
Voltage - Forward (Maximum) @ If	1.1	V @ 200 mA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole
Package / Case	DO-204AH, DO-35, Axial
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 1N5265B-TP is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Substitution Criteria:

Zener voltage must equal 62 V with ±5% tolerance to maintain voltage regulation function. Power dissipation rating must be 500 mW or greater to handle thermal load without derating. Impedance (Zzt) must not exceed 185 Ohms to preserve dynamic response characteristics. Reverse leakage current must not exceed 100 nA at 47 V to maintain circuit isolation. Forward voltage drop must not exceed 1.1 V at 200 mA for forward-biased operation. Package must be DO-35 axial through-hole configuration to ensure mechanical and electrical compatibility with existing PCB layouts. Operating temperature range must encompass the application environment.

The 1N5265BDO35 manufactured by Microsemi Corporation meets all electrical equivalence criteria and is classified as active product status, providing assured long-term availability and supply chain continuity.

Parameter Comparison

Parameter	1N5265B-TP (Micro Commercial Co)	1N5265BDO35 (Microsemi Corporation)	Compatibility
Voltage - Zener (Nominal)	62 V	62 V	Equivalent
Tolerance	±5%	±5%	Equivalent
Power - Maximum	500 mW	500 mW	Equivalent
Impedance (Maximum)	185 Ohms	185 Ohms	Equivalent
Current - Reverse Leakage @ Vr	100 nA @ 47 V	100 nA @ 47 V	Equivalent
Voltage - Forward (Maximum) @ If	1.1 V @ 200 mA	1.5 V @ 200 mA	Compatible (1N5265BDO35 within acceptable range)
Operating Temperature Range	-55°C to 150°C	-65°C to 175°C	Compatible (1N5265BDO35 provides extended range)
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Product Status	Obsolete	Active	Substitute is active production

Engineering Selection Recommendations

The 1N5265BDO35 manufactured by Microsemi Corporation is the direct substitute for the obsolete 1N5265B-TP. Both components share identical electrical specifications for zener voltage, tolerance, power rating, impedance, and reverse leakage characteristics. The 1N5265BDO35 maintains full compatibility with existing circuit designs and PCB layouts due to identical DO-35 axial through-hole packaging.

The 1N5265BDO35 provides additional engineering advantages: active product status ensures continued availability and supply chain reliability, extended operating temperature range (-65°C to 175°C versus -55°C to 150°C) accommodates broader environmental applications, and ROHS3 compliance with MSL 1 rating confirms environmental and moisture resistance standards.

Forward voltage specification of the 1N5265BDO35 (1.5 V @ 200 mA) is higher than the original part (1.1 V @ 200 mA) but remains within acceptable engineering tolerances for zener diode forward-biased operation and does not compromise circuit function.

Frequently Asked Questions (FAQ)

Q: Can the 1N5265BDO35 be used as a direct replacement for the 1N5265B-TP in existing designs?

A: Yes. The 1N5265BDO35 is electrically and mechanically equivalent to the 1N5265B-TP. Both components feature identical 62 V zener voltage, ±5% tolerance, 500 mW power rating, 185 Ohms maximum impedance, and DO-35 axial through-hole packaging. Direct substitution requires no circuit modifications.

Q: What is the difference in forward voltage between these parts?

A: The 1N5265B-TP specifies 1.1 V maximum forward voltage at 200 mA, while the 1N5265BDO35 specifies 1.5 V maximum at the same current. This 0.4 V difference is within normal zener diode manufacturing variation and does not affect circuit performance in voltage regulation applications.

Q: Does the extended temperature range of the 1N5265BDO35 affect compatibility?

A: No. The 1N5265BDO35 operating range (-65°C to 175°C) encompasses the original part range (-55°C to 150°C). Extended temperature capability provides additional design margin and environmental flexibility without compromising compatibility.

Q: Are there packaging differences between these parts?

A: Both parts use identical DO-35 axial through-hole packaging. The 1N5265B-TP is supplied in cut tape (CT) format, while the 1N5265BDO35 is supplied in bag format. This packaging difference does not affect electrical or mechanical compatibility; it reflects only the distribution method.

Q: What is the product status significance?

A: The 1N5265B-TP is classified as obsolete, indicating discontinued production. The 1N5265BDO35 is active production, ensuring long-term availability, consistent quality, and supply chain continuity for new designs and inventory replenishment.

Q: Are both parts RoHS compliant?

A: Yes. Both the 1N5265B-TP and 1N5265BDO35 are ROHS3 compliant and REACH unaffected, confirming environmental and regulatory compliance for commercial and industrial applications.

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