1N962B Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N962B is an 11 V, 500 mW Zener diode manufactured by onsemi in a DO-35 (DO-204AH) axial through-hole package. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. The 1N962B operates across a temperature range of -65°C to 200°C with ±5% voltage tolerance and serves applications requiring precision voltage regulation in compact form factors.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	11	V
Power - Maximum	500	mW
Tolerance	±5%	—
Impedance (Maximum)	9.5	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 8.4 V
Operating Temperature Range	-65 to 200	°C
Mounting Type	Through Hole	—
Package / Case	DO-204AH, DO-35, Axial	—

Substitute Part Grouping Explanation

Substitution of the 1N962B is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nominal): 11 V
Power - Maximum: 500 mW
Tolerance: ±5%
Package / Case: DO-204AH, DO-35, Axial
Mounting Type: Through Hole

Direct Equivalents maintain all primary criteria and are suitable for one-to-one replacement in existing designs. These parts share identical zener voltage, power rating, tolerance, and package specifications.

Similar Parts deviate in one or more parameters such as impedance, reverse leakage current, operating temperature range, or power rating. These parts are functionally related but require design review before substitution.

Substitution logic is based exclusively on the parameters listed above. Parts are grouped by their adherence to these criteria, with direct equivalents listed first, followed by similar alternatives that may require application-specific evaluation.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Power (mW)	Tolerance	Zzt (Ohms)	Reverse Leakage @ Vr	Operating Temp (°C)	Package	Product Status
1N962B	onsemi	11	500	±5%	9.5	5 µA @ 8.4 V	-65 to 200	DO-35	Obsolete
1N5241B	Microchip Technology	11	500	±5%	22	2 µA @ 8.4 V	-65 to 175	DO-35	Active
BZX79C11	Taiwan Semiconductor Corporation	11	500	±5%	20	100 nA @ 8 V	-65 to 175	DO-35	Active
BZX79C11-T50A	onsemi	11	500	±5%	20	100 nA @ 8 V	-65 to 200	DO-35	Active
BZX85C11	Taiwan Semiconductor Corporation	11	1300	±5%	8	500 nA @ 8.2 V	-65 to 200	DO-41	Active
1EZ11D5-TP	Micro Commercial Co	11	150	±5%	8	5 µA @ 8.4 V	-55 to 150	DO-41	Active
1N3519A	Microchip Technology	11	500	±5%	8	Not specified	-65 to 175	DO-35	Active
1N4105 (DO35)	Microsemi Corporation	11	400	±5%	200	50 nA @ 8.44 V	-65 to 200	DO-35	Active
1N5241A (DO-35)	Microsemi Corporation	11	500	±10%	22	2 µA @ 8.4 V	-65 to 175	DO-35	Active
1N5241B (DO-35)	Microsemi Corporation	11	500	±5%	22	2 µA @ 8.4 V	-65 to 175	DO-35	Active
1N5241B TR PBFREE	Central Semiconductor Corp	11	500	±5%	22	2 µA @ 8.4 V	-65 to 200	DO-35	Active

Engineering Selection Recommendations

Direct Equivalents for One-to-One Replacement:

The following parts satisfy all primary substitution criteria and are suitable for direct replacement of the 1N962B in existing designs:

1N5241B (Microchip Technology): Active product status with identical zener voltage, power rating, tolerance, and DO-35 package. Operating temperature range is -65°C to 175°C, which covers the primary operating window of the 1N962B. RoHS3 compliant.
BZX79C11-T50A (onsemi): Active product status with identical electrical specifications and DO-35 package. Operating temperature range extends to 200°C, matching the 1N962B upper limit. RoHS3 compliant.
1N3519A (Microchip Technology): Active product status with matching zener voltage, power rating, tolerance, and DO-35 package. Operating temperature range is -65°C to 175°C. RoHS non-compliant.
1N5241B TR PBFREE (Central Semiconductor Corp): Active product status with identical electrical specifications and DO-35 package. Operating temperature range extends to 200°C. RoHS3 compliant.

Similar Parts Requiring Application Review:

BZX79C11 (Taiwan Semiconductor Corporation): Active product status with matching primary specifications but operating temperature limited to -65°C to 175°C. RoHS3 compliant.
1N5241A (DO-35) (Microsemi Corporation): Active product status with 11 V zener voltage and 500 mW power rating. Tolerance is ±10%, which is wider than the 1N962B ±5% specification. Operating temperature range is -65°C to 175°C. RoHS3 compliant.
1N5241B (DO-35) (Microsemi Corporation): Active product status with identical electrical specifications and DO-35 package. Operating temperature range is -65°C to 175°C. RoHS non-compliant.

Parts with Deviations:

BZX85C11 (Taiwan Semiconductor Corporation): Power rating of 1.3 W exceeds the 1N962B 500 mW specification. Package is DO-41 instead of DO-35. Suitable only for applications where higher power dissipation is acceptable and package change is feasible.
1EZ11D5-TP (Micro Commercial Co): Power rating of 150 mW is below the 1N962B 500 mW specification. Package is DO-41 instead of DO-35. Operating temperature range is -55°C to 150°C, which is narrower than the 1N962B range.
1N4105 (DO35) (Microsemi Corporation): Power rating of 400 mW is below the 1N962B 500 mW specification. Impedance of 200 Ohms is significantly higher than the 1N962B 9.5 Ohms. Operating temperature range extends to 200°C. RoHS non-compliant.

Frequently Asked Questions (FAQ)

Q: Can the 1N5241B directly replace the 1N962B?

A: Yes. The 1N5241B shares identical zener voltage (11 V), power rating (500 mW), tolerance (±5%), and package (DO-35). The operating temperature range of -65°C to 175°C covers the primary operating window of the 1N962B. The part is active and RoHS3 compliant.

Q: What is the difference between BZX79C11 and BZX79C11-T50A?

A: Both parts have identical electrical specifications (11 V, 500 mW, ±5%, DO-35). The primary difference is the operating temperature range: BZX79C11 operates from -65°C to 175°C, while BZX79C11-T50A extends to 200°C, matching the 1N962B upper temperature limit. BZX79C11-T50A is manufactured by onsemi and is RoHS3 compliant.

Q: Why is the 1N962B obsolete?

A: The 1N962B is listed as obsolete by the manufacturer. Multiple active alternatives with equivalent or superior specifications are available from other manufacturers, making continued production unnecessary.

Q: Can I use the BZX85C11 as a substitute?

A: The BZX85C11 has a higher power rating (1.3 W versus 500 mW) and a different package (DO-41 versus DO-35). Substitution is possible only if the application can accommodate the higher power dissipation capability and the physical package change does not conflict with circuit board layout or mechanical constraints.

Q: What does the tolerance specification mean?

A: The ±5% tolerance indicates the acceptable deviation of the zener voltage from the nominal 11 V value. The 1N962B and most direct equivalents maintain this ±5% tolerance. The 1N5241A has a wider ±10% tolerance, which may be unsuitable for applications requiring tighter voltage regulation.

Q: Are all substitute parts RoHS compliant?

A: No. The 1N962B is REACH unaffected. Among the substitutes, 1N5241B (Microchip Technology), BZX79C11, BZX79C11-T50A, BZX85C11, 1N5241A, and 1N5241B TR PBFREE are RoHS3 compliant. The 1N3519A, 1N4105, and 1N5241B (Microsemi Corporation) are RoHS non-compliant.

Q: What is the significance of impedance (Zzt) in zener diode selection?

A: Impedance affects the dynamic response of the zener diode under changing load conditions. The 1N962B has an impedance of 9.5 Ohms. Direct equivalents such as 1N5241B have 22 Ohms, while BZX79C11 and BZX79C11-T50A have 20 Ohms. Lower impedance generally provides better voltage regulation stability.

Q: Can I substitute a part with a lower power rating?

A: Substitution with a lower power rating (such as 1EZ11D5-TP at 150 mW) is not recommended for applications designed for 500 mW dissipation. The lower-rated part may overheat and fail under normal operating conditions.

Q: What is the difference between reverse leakage current specifications?

A: Reverse leakage current indicates the small current that flows through the zener diode when it is reverse-biased below the zener voltage. The 1N962B specifies 5 µA @ 8.4 V. Lower leakage currents (such as 100 nA in BZX79C11) indicate better isolation characteristics and lower standby power consumption.

Q: Are tape and reel (TR) and cut tape (CT) packaging options interchangeable?

A: Tape and reel and cut tape are both through-hole component packaging formats suitable for automated assembly. The electrical specifications remain identical. The packaging format affects handling and assembly processes but not component functionality or performance.

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