1N4760A-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The 1N4760A-TP is a 68 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 1N4760A-TP operates across a temperature range of -65°C to 200°C with ±5% voltage tolerance and is ROHS3 compliant. Substitute parts must maintain the 68 V nominal zener voltage, ±5% tolerance specification, and through-hole axial mounting configuration to ensure functional compatibility in existing circuit designs.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	68	V
Tolerance	±5%	—
Power - Max	1	W
Impedance (Max)	150	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 51.7 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	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the 1N4760A-TP is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 68 V (exact match required)
Tolerance: ±5% (acceptable; tighter tolerances such as ±2% are also acceptable)
Mounting Type: Through Hole (required for PCB compatibility)
Package / Case: DO-204AL, DO-41, or Axial equivalent (physical and electrical compatibility)

Secondary Compatibility Factors:

Power - Max: 1 W or greater (higher power ratings provide design margin)
Impedance (Max): 150 Ohms or lower (lower impedance acceptable)
Current - Reverse Leakage: 5 µA or lower (lower leakage acceptable)
Voltage - Forward (Vf): 1.2 V or lower at 200 mA (forward voltage compatibility)
Operating Temperature: Must support minimum -65°C to 150°C range (200°C upper limit is design margin, not required)
RoHS Status: ROHS3 compliant preferred for regulatory alignment

Substitute parts are grouped into two categories: direct replacements with identical electrical specifications and enhanced alternatives with improved power handling or tighter tolerance specifications.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (W)	Zzt (Ohms)	Vf (V) @ If	Temp Range (°C)	Package	Status	RoHS
1N4760A-TP	Micro Commercial Co	68	±5%	1	150	1.2 @ 200 mA	-65 to 200	DO-41G	Obsolete	ROHS3
1N4760AP-TP	Micro Commercial Co	68	±5%	1	150	1.2 @ 200 mA	-65 to 150	DO-41	Active	ROHS3
1N4760A-TAP	Vishay General Semiconductor	68	±5%	1.3	150	1.2 @ 200 mA	-65 to 175	DO-204AL (DO-41)	Active	ROHS3
1N4760A-TR	Vishay General Semiconductor	68	±5%	1.3	150	1.2 @ 200 mA	-65 to 175	DO-204AL (DO-41)	Active	ROHS3
1N4760AP/TR8	Microchip Technology	68	±5%	1	150	1.2 @ 200 mA	-65 to 150	DO-204AL (DO-41)	Active	Non-compliant
1N5373B	Microsemi Corporation	68	±5%	5	44	1.2 @ 1 A	-65 to 150	T-18	Active	Non-compliant
BZX85B68-TAP	Vishay General Semiconductor	68	±2%	1.3	130	—	-55 to 175	DO-204AL (DO-41)	Active	ROHS3
BZX85B68-TR	Vishay General Semiconductor	68	±2%	1.3	130	—	-55 to 175	DO-204AL (DO-41)	Active	ROHS3
BZX85C68-TAP	Vishay General Semiconductor	68	±5%	1.3	130	—	-55 to 175	DO-204AL (DO-41)	Active	ROHS3
BZX85C68-TR	Vishay General Semiconductor	68	±5%	1.3	130	—	-55 to 175	DO-204AL (DO-41)	Active	ROHS3
ZPY68-TAP	Vishay General Semiconductor	68	±5%	1.3	65	—	-55 to 175	DO-204AL (DO-41)	Active	ROHS3

Engineering Selection Recommendations

Direct Replacement (Identical Electrical Specifications):

The 1N4760AP-TP from Micro Commercial Co is the primary direct replacement for the obsolete 1N4760A-TP. Both parts share identical zener voltage (68 V), tolerance (±5%), power rating (1 W), and impedance (150 Ohms). The 1N4760AP-TP is active in production status and ROHS3 compliant. The operating temperature range is reduced from -65°C to 200°C to -65°C to 150°C, which is acceptable for most applications. Packaging differs only in format (Tape & Reel versus Cut Tape), not in electrical or mechanical compatibility.

Enhanced Alternatives (Improved Performance):

The 1N4760A-TAP and 1N4760A-TR from Vishay General Semiconductor provide enhanced power handling (1.3 W versus 1 W) while maintaining the same zener voltage, tolerance, and impedance specifications. Both are ROHS3 compliant and AEC-Q101 automotive qualified. These parts are suitable for applications requiring additional thermal margin or higher power dissipation capability.

The BZX85C68-TAP and BZX85C68-TR from Vishay General Semiconductor offer identical zener voltage and tolerance with improved impedance characteristics (130 Ohms versus 150 Ohms) and enhanced power rating (1.3 W). Both are ROHS3 compliant and AEC-Q101 qualified. The BZX85 series provides tighter reverse leakage specifications (500 nA versus 5 µA).

The ZPY68-TAP from Vishay General Semiconductor provides the lowest impedance option (65 Ohms) with 1.3 W power rating and ±5% tolerance. This part is ROHS3 compliant and AEC-Q101 qualified, suitable for applications requiring minimal dynamic impedance.

Not Recommended for Direct Substitution:

The 1N5373B from Microsemi Corporation uses a different package format (T-18 versus DO-41) and is not ROHS3 compliant. While it maintains the 68 V zener voltage and ±5% tolerance, the larger package and different mounting footprint require PCB redesign.

The 1N4760AP/TR8 from Microchip Technology is not ROHS3 compliant, which may conflict with regulatory requirements for new designs.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 1N4760A-TP with a higher power-rated zener diode?

A: Yes. Substitute parts with power ratings of 1.3 W or 5 W are electrically compatible provided the zener voltage remains 68 V and the package maintains through-hole axial configuration. Higher power ratings provide additional thermal margin and do not degrade circuit performance. The 1N4760A-TAP, 1N4760A-TR, BZX85C68-TAP, BZX85C68-TR, and ZPY68-TAP all provide 1.3 W ratings. The 1N5373B provides 5 W but requires package redesign.

Q: What is the difference between ±5% and ±2% tolerance zener diodes?

A: Tolerance specifies the allowable deviation of the zener voltage from the nominal 68 V specification. A ±5% tolerance allows deviation between 64.6 V and 71.4 V. A ±2% tolerance allows deviation between 66.64 V and 69.36 V. The ±2% tolerance BZX85B68-TAP and BZX85B68-TR provide tighter voltage regulation and are suitable for applications requiring more precise voltage reference characteristics. Both are acceptable substitutes for the ±5% specified 1N4760A-TP.

Q: Are packaging differences between Cut Tape (CT) and Tape & Reel (TR) significant?

A: Packaging format differences (Cut Tape, Tape & Reel, Tape & Box) affect procurement and assembly processes but do not impact electrical or mechanical compatibility. All formats deliver the same component in the same physical package (DO-41 or DO-204AL). Selection depends on production volume and assembly equipment compatibility, not circuit design requirements.

Q: Can I use the 1N5373B as a substitute despite the different package?

A: The 1N5373B maintains the 68 V zener voltage and ±5% tolerance but uses a T-18 axial package instead of DO-41. This larger package has different lead spacing and physical dimensions, requiring PCB redesign and new footprint layout. Electrical substitution is valid, but mechanical redesign is necessary. Use only if PCB modification is feasible.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. Parts bearing this qualification (1N4760A-TAP, 1N4760A-TR, BZX85B68-TAP, BZX85B68-TR, BZX85C68-TAP, BZX85C68-TR, and ZPY68-TAP) have undergone rigorous testing for reliability, temperature cycling, and performance consistency. These parts are suitable for automotive and high-reliability applications.

Q: Is ROHS3 compliance mandatory for my application?

A: ROHS3 compliance is required for products sold in the European Union and many other regulated markets. The 1N4760AP-TP, 1N4760A-TAP, 1N4760A-TR, BZX85B68-TAP, BZX85B68-TR, BZX85C68-TAP, BZX85C68-TR, and ZPY68-TAP are all ROHS3 compliant. The 1N4760AP/TR8 and 1N5373B are not ROHS3 compliant and should not be used in designs requiring regulatory compliance.

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

A: Impedance (Zzt) represents the dynamic impedance of the zener diode in the reverse breakdown region. Lower impedance values provide better voltage regulation and lower output impedance in voltage reference circuits. The 1N4760A-TP specifies 150 Ohms maximum. Substitute parts with lower impedance (BZX85 series at 130 Ohms, ZPY68-TAP at 65 Ohms) provide improved regulation characteristics and are directly compatible.

Q: Can I use a substitute part with a lower operating temperature minimum?

A: Yes. The 1N4760A-TP operates from -65°C to 200°C. Substitute parts with operating ranges of -65°C to 150°C or -55°C to 175°C are acceptable provided your application does not require operation below -55°C or above 175°C. Verify your specific temperature requirements before selection.

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