1.5KE30CA-T Equivalent & Substitute Parts

Part Overview

The 1.5KE30CA-T is a transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated, rated for 1500W peak pulse power with a 25.6V reverse standoff voltage and 41.4V clamping voltage. This component is classified as obsolete, making equivalent substitutes necessary for ongoing design support and procurement. The part operates across -55°C to 175°C and is housed in a DO-201 through-hole package, suitable for general-purpose transient protection applications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	25.6	V
Voltage - Breakdown (Min)	28.5	V
Voltage - Clamping (Max) @ Ipp	41.4	V
Current - Peak Pulse (10/1000µs)	36	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	—
Bidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—
MSL Rating	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the 1.5KE30CA-T is determined by strict alignment of electrical and mechanical parameters. The critical substitution criteria are:

Electrical Parameters (Must Match):

Voltage - Reverse Standoff (Typ): 25.6V
Voltage - Breakdown (Min): 28.5V
Voltage - Clamping (Max) @ Ipp: 41.4V
Power - Peak Pulse: 1500W
Type: Zener, Bidirectional (1 channel)
Operating Temperature: -55°C minimum to 175°C maximum

Mechanical Parameters (Must Match):

Mounting Type: Through Hole
Package / Case: DO-201 series (DO-201AA, DO-27, or equivalent axial packages)
RoHS Status: ROHS3 Compliant

Acceptable Variance:

Current - Peak Pulse (10/1000µs): ±5% tolerance acceptable (36A ±1.8A range: 34.2A to 37.8A)

Substitutes are grouped into two categories:

Category 1: Direct Electrical & Mechanical Equivalents — Parts meeting all electrical parameters and housed in DO-201 series packages with identical voltage and power ratings.

Category 2: Higher Power Density Alternatives — Parts with different voltage ratings or package types (P600) that do not qualify as direct substitutes and require circuit re-evaluation.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown Min (V)	Voltage - Clamping Max (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Package	Operating Temp (°C)	Product Status
1.5KE30CA-T	Diodes Incorporated	25.6	28.5	41.4	36	1500	DO-201	-55 to 175	Obsolete
1.5KE30CA	Taiwan Semiconductor Corporation	25.6	28.5	41.4	38	1500	DO-201	-55 to 175	Active
1.5KE30CA-B	Littelfuse Inc.	25.6	28.5	41.4	36.7	1500	DO-201	-55 to 175	Active
1.5KE30CA-G	Comchip Technology	25.6	28.5	41.4	36.23	1500	DO-201	-55 to 150	Active
1.5KE30CA-TP	Micro Commercial Co	25.6	28.5	41.4	—	1500	DO-201AE	-55 to 175	Active
1V5KE30CA	Taiwan Semiconductor Corporation	25.6	28.5	41.4	36.2	1500	DO-201AD	-55 to 175	Active
5KP22CE3/TR13	Microchip Technology	22	24.4	39.4	127	5000	P600	-55 to 175	Active
5KP24CAE3/TR13	Microchip Technology	24	26.7	38.9	129	5000	P600	-55 to 175	Active
5KP24CE3/TR13	Microchip Technology	24	26.7	43	116	5000	P600	-55 to 175	Active
5KP26CAE3/TR13	Microchip Technology	26	28.9	42.1	119	5000	P600	-55 to 175	Active

Engineering Selection Recommendations

Direct Substitutes (Recommended for 1:1 Replacement):

The following parts meet all electrical and mechanical substitution criteria and are classified as active products:

1.5KE30CA (Taiwan Semiconductor Corporation) — Identical voltage and power ratings, DO-201 package, active status. Peak pulse current 38A exceeds original specification within acceptable tolerance.
1.5KE30CA-B (Littelfuse Inc.) — Identical voltage and power ratings, DO-201 package, active status. Peak pulse current 36.7A within specification tolerance.
1V5KE30CA (Taiwan Semiconductor Corporation) — Identical voltage and power ratings, DO-201AD package variant, active status. Peak pulse current 36.2A within specification tolerance.

Conditional Substitutes (Requires Circuit Evaluation):

1.5KE30CA-G (Comchip Technology) — Meets electrical specifications but operating temperature maximum is 150°C versus 175°C on original part. Acceptable only if application does not require full -55°C to 175°C range.
1.5KE30CA-TP (Micro Commercial Co) — Meets electrical specifications, DO-201AE package variant, active status. Peak pulse current not specified in datasheet; verification required before selection.

Non-Equivalent Parts (Not Recommended):

The 5KP series parts (5KP22CE3/TR13, 5KP24CAE3/TR13, 5KP24CE3/TR13, 5KP26CAE3/TR13) feature different voltage ratings, higher power ratings (5000W), and P600 package format. These do not qualify as direct substitutes and require complete circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can I use 1.5KE30CA-G as a direct replacement for 1.5KE30CA-T?

A: 1.5KE30CA-G is electrically equivalent but has a reduced operating temperature maximum of 150°C versus 175°C on the original part. Use only if your application operates within -55°C to 150°C range.

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

A: All are axial through-hole packages for TVS diodes. DO-201AA, DO-201AD, and DO-201AE are variants of the DO-201 standard. Physical dimensions and lead spacing are compatible for through-hole PCB mounting. Verify footprint compatibility with your PCB design.

Q: Why are the 5KP series parts listed if they are not direct substitutes?

A: The 5KP series parts were referenced in the original part's substitute field but do not meet the electrical criteria for direct substitution. They feature 5000W power rating versus 1500W and different voltage ratings. These are listed for reference only and require full circuit re-evaluation.

Q: Is 1.5KE30CA from Taiwan Semiconductor Corporation a suitable replacement?

A: Yes. 1.5KE30CA meets all electrical parameters (25.6V standoff, 41.4V clamping, 1500W power) and is housed in a DO-201 package. Peak pulse current is 38A, which is within acceptable tolerance of the original 36A specification. Product status is active.

Q: What does RoHS3 Compliant mean for substitution purposes?

A: All listed substitutes are RoHS3 compliant, matching the original part's environmental certification. This ensures regulatory compliance across all equivalent options.

Q: Can I mix manufacturers in the same circuit?

A: Yes. All recommended direct substitutes meet identical electrical specifications and package requirements. Mixing manufacturers is acceptable provided each part meets the specified voltage, current, power, and temperature parameters.

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