1N5941B-TP Equivalent & Substitute Parts

Part Overview

The 1N5941B-TP is a Zener diode rated at 47 V with 1.5 W power dissipation in a DO-41G through-hole package. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design support and procurement. The 1N5941B-TP maintains ROHS3 compliance and operates across a temperature range of -55°C to 150°C, making it suitable for general-purpose voltage regulation and protection applications in electronic circuits.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	47	V
Tolerance	±5%	%
Power - Max	1.5	W
Impedance (Max)	67	Ohms
Current - Reverse Leakage @ Vr	1	µA @ 35.8 V
Voltage - Forward (Vf) (Max) @ If	1.2	V @ 200 mA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 1N5941B-TP is determined by electrical and mechanical parameter equivalence. The critical parameters that define substitutability are:

Nominal Zener voltage: 47 V
Tolerance specification: ±5%
Maximum power dissipation: 1.5 W
Maximum impedance: 67 Ohms
Reverse leakage current: 1 µA @ 35.8 V
Through-hole mounting configuration
DO-41 package family compatibility
ROHS3 compliance

The 1N5941BP-TP meets all electrical specifications and maintains mechanical compatibility through identical package designation and through-hole mounting. The primary distinction between the main part and its substitute is packaging format (bulk versus tape & reel) and product status (obsolete versus active).

Parameter Comparison

Parameter	1N5941B-TP	1N5941BP-TP	Match
Voltage - Zener (Nom)	47 V	47 V	Yes
Tolerance	±5%	±5%	Yes
Power - Max	1.5 W	1.5 W	Yes
Impedance (Max)	67 Ohms	67 Ohms	Yes
Current - Reverse Leakage @ Vr	1 µA @ 35.8 V	1 µA @ 35.8 V	Yes
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA	1.5 V @ 200 mA	Compatible
Operating Temperature Range	-55°C to 150°C	-55°C to 175°C	Compatible
Mounting Type	Through Hole	Through Hole	Yes
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	Yes
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Yes
Product Status	Obsolete	Active	Substitute Available

Engineering Selection Recommendations

The 1N5941BP-TP is a direct electrical and mechanical substitute for the 1N5941B-TP. Both components share identical nominal Zener voltage, tolerance, maximum power rating, impedance specification, and reverse leakage characteristics. The 1N5941BP-TP is currently in active production status, whereas the 1N5941B-TP is obsolete.

The 1N5941BP-TP offers an extended operating temperature range (-55°C to 175°C versus -55°C to 150°C), providing additional thermal margin in high-temperature applications. The forward voltage specification differs slightly (1.5 V @ 200 mA versus 1.2 V @ 200 mA), which remains within acceptable operating parameters for standard voltage regulation and protection circuits.

Both parts maintain ROHS3 compliance and identical moisture sensitivity levels. The primary practical difference is packaging format: the 1N5941BP-TP is supplied in tape & reel configuration, whereas the 1N5941B-TP was supplied in bulk packaging. This distinction affects procurement and assembly processes but does not impact electrical performance or circuit functionality.

Frequently Asked Questions (FAQ)

Q: Can the 1N5941BP-TP replace the 1N5941B-TP in existing designs?

A: Yes. The 1N5941BP-TP is electrically and mechanically equivalent to the 1N5941B-TP. Both components have identical Zener voltage (47 V), tolerance (±5%), power rating (1.5 W), impedance (67 Ohms), and package configuration (DO-41 through-hole). The substitute part is suitable for direct replacement in circuit applications.

Q: What is the difference between the 1N5941B-TP and 1N5941BP-TP?

A: The primary differences are product status and packaging format. The 1N5941B-TP is obsolete and supplied in bulk packaging, while the 1N5941BP-TP is active production and supplied in tape & reel format. The 1N5941BP-TP also features an extended operating temperature range (175°C maximum versus 150°C maximum). Electrical specifications are equivalent.

Q: Are there any thermal considerations when substituting the 1N5941BP-TP?

A: The 1N5941BP-TP supports operation to 175°C junction temperature, compared to 150°C for the 1N5941B-TP. This extended range provides additional thermal headroom in applications approaching the upper temperature limit. Both parts maintain identical power dissipation ratings and impedance characteristics.

Q: Does the tape & reel packaging of the 1N5941BP-TP affect circuit performance?

A: No. Packaging format (tape & reel versus bulk) does not affect electrical performance or circuit functionality. The tape & reel format is a procurement and assembly consideration only. The component itself is identical in electrical characteristics and physical dimensions.

Q: Are both parts RoHS compliant?

A: Yes. Both the 1N5941B-TP and 1N5941BP-TP are ROHS3 compliant and carry moisture sensitivity level 1 (unlimited), indicating no special moisture handling requirements during storage or assembly.

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

A: The 1N5941B-TP specifies 1.2 V maximum forward voltage at 200 mA, while the 1N5941BP-TP specifies 1.5 V maximum at the same current. This difference is within normal manufacturing tolerance for Zener diodes and does not impact standard voltage regulation or protection circuit operation.

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