1.5KE220A-T Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The 1.5KE220A-T is a unidirectional Zener-type transient voltage suppressor diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection applications. This component features a 185V reverse standoff voltage with 328V maximum clamping voltage and 4.6A peak pulse current capability in a through-hole DO-201 package. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for continued system support and new design implementations.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	185	V
Voltage - Breakdown (Min)	209	V
Voltage - Clamping (Max) @ Ipp	328	V
Current - Peak Pulse (10/1000µs)	4.6	A
Power - Peak Pulse	1500	W
Operating Temperature Range	-55 to 175	°C
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 eligibility for the 1.5KE220A-T is determined by strict equivalence across the following critical parameters:

Voltage - Reverse Standoff (Typ): 185V
Voltage - Breakdown (Min): 209V
Voltage - Clamping (Max) @ Ipp: 328V
Current - Peak Pulse (10/1000µs): 4.6A nominal
Power - Peak Pulse: 1500W
Operating Temperature Range: -55°C to 175°C minimum
Mounting Type: Through Hole
Package / Case: DO-201 series (DO-201AA, DO-27, DO-201AD, DO-201AE)
Type: Zener, Unidirectional
RoHS3 Compliance

All identified substitute parts maintain these electrical specifications and mechanical compatibility. Variations in peak pulse current (4.57A to 4.8A) and operating temperature upper limits remain within acceptable tolerance ranges for general-purpose transient suppression applications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vwm (V)	Vbr (V)	Vc (V)	Ipp (A)	Ppk (W)	Temp Range (°C)	Package	RoHS
1.5KE220A-T	Diodes Incorporated	Obsolete	185	209	328	4.6	1500	-55 to 175	DO-201	ROHS3
1.5KE220A-E3/54	Vishay General Semiconductor	Active	185	209	328	4.6	1500	-55 to 175	DO-201AA	ROHS3
1.5KE220AHE3_A/C	Vishay General Semiconductor	Active	185	209	328	4.6	1500	-55 to 175	DO-201AA	ROHS3
1V5KE220A	Taiwan Semiconductor Corporation	Active	185	209	328	4.6	1500	-55 to 175	DO-201AD	ROHS3
1.5KE220A	Taiwan Semiconductor Corporation	Active	185	209	328	4.8	1500	-55 to 175	DO-201	ROHS3
1.5KE220A-B	Littelfuse Inc.	Active	185	209	328	4.6	1500	-55 to 175	DO-201	ROHS3
1.5KE220A-G	Comchip Technology	Active	185	209	328	4.57	1500	-55 to 150	DO-201	ROHS3
1.5KE220A-TP	Micro Commercial Co	Active	185	209	328	—	1500	-55 to 175	DO-201AE	ROHS3

Engineering Selection Recommendations

All identified substitute parts are classified as active products with current manufacturing status, eliminating supply chain risk associated with the obsolete 1.5KE220A-T. Selection among available alternatives should be based on the following criteria:

Primary Recommendation: 1.5KE220A (Taiwan Semiconductor Corporation) - Maintains full electrical equivalence with 4.8A peak pulse current and active production status with highest inventory availability (4200 pcs).

Automotive-Grade Option: 1.5KE220AHE3_A/C (Vishay General Semiconductor) - Qualified to AEC-Q101 automotive standard with active status, suitable for applications requiring automotive-grade component certification.

Packaging Considerations: Selection between DO-201AA, DO-201AD, and DO-201AE variants depends on existing PCB footprint and assembly process compatibility. All variants maintain mechanical and electrical equivalence.

Temperature-Constrained Applications: 1.5KE220A-G (Comchip Technology) operates to 150°C maximum junction temperature, suitable only for applications not exceeding this thermal limit.

Frequently Asked Questions (FAQ)

Q: Can I directly substitute 1.5KE220A-T with any of the listed alternatives?

A: Yes, all listed parts maintain identical voltage specifications (185V standoff, 328V clamping), power rating (1500W), and through-hole mounting compatibility. Electrical performance remains equivalent across all alternatives.

Q: What is the difference between DO-201AA, DO-201AD, and DO-201AE packages?

A: These are mechanical variants of the DO-201 axial through-hole package. All maintain identical electrical specifications and footprint compatibility. Selection depends on specific PCB design and assembly equipment compatibility.

Q: Does the 4.8A peak pulse current in 1.5KE220A exceed the 4.6A specification of the original part?

A: The 4.8A specification represents a higher current capability within the same 1500W power envelope and maintains full compatibility with the 1.5KE220A-T design. This variation is within acceptable tolerance for transient suppression applications.

Q: Is the 1.5KE220A-G suitable for all applications?

A: The 1.5KE220A-G operates to 150°C maximum junction temperature, compared to 175°C for other alternatives. Applications requiring operation above 150°C junction temperature should select alternatives with extended temperature range.

Q: What packaging format should I specify for new designs?

A: For new designs, specify 1.5KE220A with Cut Tape (CT) or Tape & Reel (TR) packaging for automated assembly. For through-hole manual assembly, Bulk packaging is acceptable. Packaging format does not affect electrical performance.

Q: Are all substitutes RoHS3 compliant?

A: Yes, all identified substitute parts are RoHS3 compliant with MSL rating of 1 (Unlimited), matching the compliance profile of the original 1.5KE220A-T.

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