1N4756A-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N4756A-TP is a 47 V, 1 W Zener diode manufactured by Micro Commercial Co in DO-41G axial through-hole package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 1N4756A-TP serves voltage regulation and transient protection applications requiring precise 47 V Zener voltage with ±5% tolerance and 1 W power dissipation capability.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	47	V
Tolerance	±5%	%
Power - Max	1	W
Impedance (Max)	80	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 35.8 V
Voltage - Forward (Vf) (Max) @ If	1.2	V @ 200 mA
Operating Temperature	-65 to 200	°C
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial

Substitute Part Grouping Explanation

Substitution of the 1N4756A-TP is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 47 V (exact match required)
Tolerance: ±5% (exact match required)
Power - Max: 1 W minimum (equal or greater acceptable)
Impedance (Max): 80 Ohms (exact match required)
Current - Reverse Leakage @ Vr: 5 µA @ 35.8 V (exact match required)
Voltage - Forward (Vf) (Max) @ If: 1.2 V @ 200 mA (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: DO-204AL, DO-41, Axial (exact match required)

Secondary Considerations:

Operating Temperature range may vary; substitute parts with lower maximum temperature ratings are acceptable if application requirements are met
Product Status (Active vs. Obsolete) affects long-term availability
RoHS and REACH compliance status for regulatory requirements
Packaging format (Tape & Reel, Cut Tape, Bag) affects procurement and assembly processes

All substitute parts listed maintain identical electrical specifications for the 47 V Zener voltage class with 1 W power rating and DO-41 package family compatibility.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (W)	Zzt (Ohms)	Vf @ If (V)	Temp Range (°C)	Package	Status
1N4756A-TP	Micro Commercial Co	47	±5%	1	80	1.2 @ 200 mA	-65 to 200	DO-41G	Obsolete
1N4756AP-TP	Micro Commercial Co	47	±5%	1	80	1.2 @ 200 mA	-65 to 150	DO-41	Active
1N4756A	Lumimax Optoelectronic Technology	47	±5%	1	80	1.2 @ 200 mA	-65 to 200	DO-41G	Active
1N4756A-TAP	Vishay General Semiconductor - Diodes Division	47	±5%	1.3	80	1.2 @ 200 mA	-65 to 175	DO-204AL (DO-41)	Active
1N4756A-TR	Vishay General Semiconductor - Diodes Division	47	±5%	1.3	80	1.2 @ 200 mA	-65 to 175	DO-204AL (DO-41)	Active
1N4756AGE3	Microchip Technology	47	±5%	1	80	1.2 @ 200 mA	-65 to 175	DO-41	Active
1N4756AP/TR8	Microchip Technology	47	±5%	1	80	1.2 @ 200 mA	-65 to 150	DO-204AL (DO-41)	Active
1N4756A TR PBFREE	Central Semiconductor Corp	47	±5%	1	80	1.2 @ 200 mA	-65 to 200	DO-41	Active
1N4756G	Taiwan Semiconductor Corporation	47	±5%	1	80	1.2 @ 200 mA	-65 to 200	DO-204AL (DO-41)	Active

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility):

The 1N4756A from Lumimax Optoelectronic Technology provides direct electrical and thermal equivalence to the 1N4756A-TP. This part maintains identical Zener voltage (47 V), tolerance (±5%), power rating (1 W), impedance (80 Ohms), and operating temperature range (-65°C to 200°C). The DO-41G package is functionally equivalent to DO-41. This part is Active status with RoHS compliance, ensuring long-term availability and regulatory alignment.

Active Substitutes with Equivalent Electrical Performance:

The 1N4756AP-TP (Micro Commercial Co), 1N4756AGE3 (Microchip Technology), 1N4756AP/TR8 (Microchip Technology), 1N4756A TR PBFREE (Central Semiconductor Corp), and 1N4756G (Taiwan Semiconductor Corporation) all maintain the critical 47 V Zener voltage, ±5% tolerance, 1 W power rating, and 80 Ohms impedance. These parts are Active status. Operating temperature ranges vary between -65°C to 150°C and -65°C to 175°C; selection depends on application thermal requirements.

Enhanced Power Rating Alternatives:

The 1N4756A-TAP and 1N4756A-TR (both Vishay General Semiconductor - Diodes Division) provide 1.3 W power rating while maintaining all other electrical parameters identical to the 1N4756A-TP. These parts include AEC-Q101 automotive qualification and are suitable for applications requiring higher power dissipation margin. Operating temperature is -65°C to 175°C.

Compliance Considerations:

All substitute parts listed are RoHS3 compliant except 1N4756AP/TR8, which is RoHS non-compliant. All parts are REACH Unaffected. Selection should align with end-product regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can I substitute 1N4756A-TP with 1N4756AP-TP?

A: Yes. Both parts maintain identical Zener voltage (47 V), tolerance (±5%), power rating (1 W), impedance (80 Ohms), and forward voltage characteristics. The 1N4756AP-TP is Active status. The operating temperature range is -65°C to 150°C versus -65°C to 200°C for the original part; verify application temperature requirements before selection.

Q: What is the difference between 1N4756A-TAP and 1N4756A-TR?

A: Both parts are manufactured by Vishay General Semiconductor - Diodes Division with identical electrical specifications: 47 V Zener voltage, ±5% tolerance, 1.3 W power rating, and 80 Ohms impedance. The difference is packaging format: 1N4756A-TAP is Cut Tape (CT) while 1N4756A-TR is also Cut Tape (CT). Both are AEC-Q101 qualified for automotive applications.

Q: Are all substitute parts in the same DO-41 package family?

A: Yes. All substitute parts use DO-204AL, DO-41, or DO-41G packages, which are mechanically and electrically compatible axial through-hole packages. Pin spacing and lead diameter are standardized across this package family, allowing direct board-level substitution.

Q: Which substitute part has the widest operating temperature range?

A: The 1N4756A (Lumimax), 1N4756A-TP (original), 1N4756A TR PBFREE (Central Semiconductor Corp), and 1N4756G (Taiwan Semiconductor Corporation) all support -65°C to 200°C operating temperature range. Other substitutes support -65°C to 150°C or -65°C to 175°C.

Q: Is RoHS compliance required for my application?

A: Most substitute parts are RoHS3 compliant. The exception is 1N4756AP/TR8 (Microchip Technology), which is RoHS non-compliant. Verify your end-product regulatory requirements before selection. All parts are REACH Unaffected.

Q: Can I use 1N4756A-TAP or 1N4756A-TR with higher 1.3 W power rating as a direct replacement?

A: Yes. The 1.3 W power rating is equal to or greater than the 1 W requirement, maintaining all other electrical parameters (47 V Zener voltage, ±5% tolerance, 80 Ohms impedance, 1.2 V forward voltage). Higher power rating provides additional thermal margin without affecting circuit operation.

Q: What packaging formats are available for procurement?

A: Substitute parts are available in multiple packaging formats: Tape & Reel (TR), Cut Tape (CT), Tape & Box (TB), and Bag. Selection depends on assembly process requirements and order quantities. Tape & Reel format is standard for high-volume automated assembly.

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