1N5272B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N5272B-TP is a through-hole zener diode rated for 110 V nominal zener voltage with 500 mW maximum power dissipation in a DO-35 axial package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements. Substitute parts must maintain electrical performance within the specified tolerance and thermal operating range while offering current availability and active product status.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	110	V
Tolerance	±5%	%
Power - Max	500	mW
Impedance (Max)	750	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 84 V
Voltage - Forward (Vf) (Max) @ If	1.1	V @ 200 mA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole
Package / Case	DO-35
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 1N5272B-TP is determined by the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

Zener voltage: 110 V nominal with ±5% tolerance
Maximum power dissipation: 500 mW
Impedance (maximum): 750 Ohms
Reverse leakage current: 100 nA @ 84 V
Package configuration: DO-35 axial through-hole

Mechanical Compatibility:

Through-hole mounting type
DO-35 package footprint and lead spacing

Compliance Requirements:

ROHS3 compliance
REACH unaffected status
EAR99 export classification

The 1N5272BDO35 from Microsemi Corporation meets all electrical specifications and maintains package compatibility. The substitute part is classified as active product status, ensuring ongoing availability and supply chain continuity.

Parameter Comparison

Parameter	1N5272B-TP (Micro Commercial Co)	1N5272BDO35 (Microsemi Corporation)	Match Status
Voltage - Zener (Nom)	110 V	110 V	Equivalent
Tolerance	±5%	±5%	Equivalent
Power - Max	500 mW	500 mW	Equivalent
Impedance (Max)	750 Ohms	750 Ohms	Equivalent
Current - Reverse Leakage @ Vr	100 nA @ 84 V	100 nA @ 84 V	Equivalent
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 200 mA	1.5 V @ 200 mA	Substitute Higher
Operating Temperature Range	-55°C to 150°C	-65°C to 175°C	Substitute Extended
Mounting Type	Through Hole	Through Hole	Equivalent
Package / Case	DO-35	DO-35	Equivalent
Product Status	Obsolete	Active	Substitute Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent

Engineering Selection Recommendations

The 1N5272BDO35 manufactured by Microsemi Corporation is a direct functional equivalent for the obsolete 1N5272B-TP. Both components share identical zener voltage, power rating, impedance, and reverse leakage specifications. The substitute part maintains ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for both legacy and new production applications.

The 1N5272BDO35 offers extended operating temperature range (-65°C to 175°C versus -55°C to 150°C), providing enhanced thermal performance margin. Forward voltage specification of the substitute part is 1.5 V @ 200 mA compared to 1.1 V @ 200 mA for the original part; this difference is within acceptable circuit design tolerances for zener diode applications and does not preclude direct substitution in standard voltage regulation and protection circuits.

Active product status of the 1N5272BDO35 ensures supply availability and long-term manufacturability, eliminating obsolescence risk associated with the original component.

Frequently Asked Questions (FAQ)

Q: Can the 1N5272BDO35 be used as a direct replacement for the 1N5272B-TP in existing designs?

A: Yes. Both components share identical zener voltage (110 V), power rating (500 mW), impedance (750 Ohms), and reverse leakage specifications (100 nA @ 84 V). The DO-35 package footprint and through-hole mounting configuration are identical, enabling direct PCB substitution without layout modification.

Q: What is the significance of the forward voltage difference between the two parts?

A: The 1N5272B-TP specifies 1.1 V forward voltage @ 200 mA, while the 1N5272BDO35 specifies 1.5 V @ 200 mA. This 0.4 V difference applies to forward-biased operation and does not affect zener regulation performance in reverse-biased voltage regulation applications. Standard circuit designs accommodate this variation within normal component tolerance margins.

Q: Does the extended temperature range of the substitute part affect compatibility?

A: No. The 1N5272BDO35 operating range of -65°C to 175°C encompasses the original part's range of -55°C to 150°C. Extended temperature capability provides additional design margin without introducing incompatibility.

Q: Are there any compliance or certification differences between the two parts?

A: Both components are ROHS3 compliant and REACH unaffected. Regulatory compliance is equivalent, and both parts carry identical EAR99 export classification and HTSUS code 8541.10.0050.

Q: What is the primary reason for substitution?

A: The 1N5272B-TP is classified as obsolete product status. The 1N5272BDO35 is active product, ensuring continued availability, supply chain reliability, and manufacturer support for production applications.

Q: Are there any package or lead configuration differences?

A: No. Both components use the DO-35 axial package with identical through-hole lead configuration. No PCB redesign or mechanical modification is required for substitution.

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