1.5KE180A-T Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 1.5KE180A-T is a unidirectional transient voltage suppressor diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in through-hole applications. This component features a 154V reverse standoff voltage with 246V maximum clamping voltage and 1500W peak pulse power rating. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for continued system support and new designs.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	154	V
Voltage - Breakdown (Min)	171	V
Voltage - Clamping (Max) @ Ipp	246	V
Current - Peak Pulse (10/1000µs)	6.1	A
Power - Peak Pulse	1500	W
Operating Temperature Range	-55 to 175	°C (TJ)
Mounting Type	Through Hole	-
Package / Case	DO-201AA, DO-27, Axial	-
Type	Zener	-
Unidirectional Channels	1	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the 1.5KE180A-T is determined by strict equivalence across the following critical parameters:

Voltage - Reverse Standoff (Typ): 154V
Voltage - Breakdown (Min): 171V
Voltage - Clamping (Max) @ Ipp: 246V
Current - Peak Pulse (10/1000µs): 6.1A minimum
Power - Peak Pulse: 1500W
Type: Zener, Unidirectional
Mounting Type: Through Hole
Package / Case: DO-201AA, DO-27, or Axial
Operating Temperature: -55°C to 175°C minimum
RoHS Status: ROHS3 Compliant

All identified substitute parts maintain these electrical specifications within the allowed tolerances. Variations in peak pulse current (6.1A to 6.4A) and minor packaging designations (DO-201, DO-201AA, DO-201AE, DO-201AD) remain within acceptable substitution parameters for this component category.

Parameter Comparison

Part Number	Manufacturer	VWM (V)	VBR (V)	VC (V)	Ipp (A)	Power (W)	Temp Range (°C)	Package	Status
1.5KE180A-T	Diodes Incorporated	154	171	246	6.1	1500	-55 to 175	DO-201	Obsolete
1.5KE180A	Taiwan Semiconductor Corporation	154	171	246	6.4	1500	-55 to 175	DO-201	Active
1.5KE180A-E3/54	Vishay General Semiconductor	154	171	246	6.1	1500	-55 to 175	DO-201	Active
1.5KE180AHE3_A/C	Vishay General Semiconductor	154	171	246	6.1	1500	-55 to 175	DO-201	Active
1N6302A-E3/54	Vishay General Semiconductor	154	171	246	6.1	1500	-55 to 175	DO-201	Active
1.5KE180A-G	Comchip Technology	154	171	246	6.1	1500	-55 to 150	DO-201	Active
1.5KE180A-TP	Micro Commercial Co	154	171	246	6.2	1500	-55 to 175	DO-201AE	Active
1N5664A	Solid State Inc.	154	171	246	6.1	1500	-65 to 175	DO-13	Active

Engineering Selection Recommendations

All substitute parts listed maintain electrical equivalence to the 1.5KE180A-T across voltage, current, and power specifications. Selection among active alternatives is determined by the following factors:

Primary Substitutes (Full Compatibility):

1.5KE180A (Taiwan Semiconductor Corporation): Active status with identical specifications and full temperature range support (-55°C to 175°C). Peak pulse current of 6.4A exceeds minimum requirement.
1.5KE180A-E3/54 (Vishay General Semiconductor): Active status with TransZorb® series designation. Exact electrical match with 6.1A peak pulse current and full temperature range.
1N6302A-E3/54 (Vishay General Semiconductor): Active status with TransZorb® series designation. Electrical equivalent with 6.1A peak pulse current.

Secondary Substitutes (Minor Considerations):

1.5KE180AHE3_A/C (Vishay General Semiconductor): Active status with AEC-Q101 automotive qualification. Identical electrical specifications. Suitable for automotive-grade applications.
1.5KE180A-TP (Micro Commercial Co): Active status with automotive-grade designation. Supports full temperature range. Peak pulse current of 6.2A within acceptable range. Package variant DO-201AE maintains through-hole compatibility.
1.5KE180A-G (Comchip Technology): Active status with reduced maximum operating temperature of 150°C. Suitable for applications not requiring full 175°C junction temperature capability.

Package Variant:

1N5664A (Solid State Inc.): Active status with DO-13 package. Electrical specifications match. Extended temperature range (-65°C to 175°C) provides additional low-temperature margin. Package change from DO-201 to DO-13 requires PCB layout verification.

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can I substitute 1.5KE180A-T with any of the listed alternatives?

A: Yes. All listed parts maintain identical voltage specifications (154V standoff, 171V breakdown, 246V clamping) and 1500W power rating. Peak pulse current variations (6.1A to 6.4A) remain within acceptable substitution parameters. Through-hole mounting compatibility is maintained across all alternatives.

Q: What is the difference between 1.5KE180A and 1.5KE180A-E3/54?

A: Both parts are electrically equivalent with 154V standoff voltage and 246V clamping voltage. The primary difference is manufacturer: Taiwan Semiconductor Corporation versus Vishay General Semiconductor. The 1.5KE180A-E3/54 carries the TransZorb® series designation. Peak pulse current is 6.4A (Taiwan) versus 6.1A (Vishay), both exceeding the original 6.1A specification.

Q: Is the 1N5664A a suitable replacement despite the DO-13 package change?

A: The 1N5664A is electrically equivalent with identical voltage and power specifications. However, the package change from DO-201 to DO-13 requires verification of PCB footprint compatibility and lead spacing. The extended operating temperature range (-65°C to 175°C) provides additional low-temperature capability.

Q: Why does 1.5KE180A-G have a lower maximum operating temperature?

A: The 1.5KE180A-G (Comchip Technology) specifies -55°C to 150°C junction temperature versus -55°C to 175°C for other alternatives. This represents a 25°C reduction in maximum junction temperature capability. Selection depends on application thermal requirements. For systems operating near 175°C, alternative sources are recommended.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original 1.5KE180A-T specifications.

Q: What is the significance of the automotive-grade designation on 1.5KE180AHE3_A/C and 1.5KE180A-TP?

A: Both parts carry automotive-grade classification with AEC-Q101 qualification (1.5KE180AHE3_A/C) or automotive designation (1.5KE180A-TP). These parts meet automotive industry reliability and testing standards. Selection is appropriate for automotive applications; non-automotive applications may use any listed alternative.

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