1.5KE100CA-B Transient Voltage Suppressor (TVS) Diode – Equivalent & Substitute Parts

Part Overview

The 1.5KE100CA-B is a bidirectional Zener-type transient voltage suppressor diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in through-hole applications. This part operates with an 85.5V reverse standoff voltage and provides 137V maximum clamping voltage at peak pulse current, with 1500W peak pulse power handling capability in a DO-201 axial package. The 1.5KE100CA-B is classified as obsolete; however, functionally equivalent and manufacturer-recommended substitute parts remain available from active product lines, ensuring continued design support and procurement flexibility.

Key Parameters

Parameter	Value	Unit
Voltage – Reverse Standoff (Typ)	85.5	V
Voltage – Breakdown (Min)	95	V
Voltage – Clamping (Max) @ Ipp	137	V
Current – Peak Pulse (10/1000µs)	11	A
Power – Peak Pulse	1500	W
Type	Zener	–
Bidirectional Channels	1	–
Mounting Type	Through Hole	–
Package / Case	DO-201AA, DO-27, Axial	–
Operating Temperature Range	-55 to 175	°C (TJ)
RoHS Status	ROHS3 Compliant	–
Moisture Sensitivity Level (MSL)	1 (Unlimited)	–

Substitute Part Grouping Explanation

Substitution of the 1.5KE100CA-B is determined by strict equivalence across the following electrical and mechanical parameters:

Voltage Rating Match: Reverse standoff voltage of 85.5V, breakdown minimum of 95V, and clamping voltage maximum of 137V must be maintained
Current Handling: Peak pulse current capability must support the circuit's transient energy requirements
Power Dissipation: Peak pulse power rating of 1500W (1.5kW) establishes the thermal performance class
Package Compatibility: DO-201 axial through-hole form factor ensures mechanical fit and PCB routing compatibility
Bidirectional Operation: Single-channel bidirectional Zener topology for symmetric overvoltage protection
Temperature Range: Operating range of -55°C to 175°C (or compatible subset) for thermal design margin
Compliance Status: RoHS3 compliance and MSL rating for manufacturing process compatibility

Substitute parts are grouped into two categories: Direct Electrical Equivalents (matching all electrical parameters within specified tolerances) and Manufacturer-Recommended Alternatives (functionally equivalent with active product status and full compliance certification).

Parameter Comparison

Manufacturer	Part Number	Product Status	Vwm (Typ) [V]	Vbr (Min) [V]	Vc (Max) [V]	Ipp [A]	Ppk [W]	Package	Temp Range [°C]	RoHS
Diodes Incorporated	1.5KE100CA-B	Obsolete	85.5	95	137	11	1500	DO-201	-55 to 175	ROHS3
Micro Commercial Co	1.5KE100CA-TP	Active	85.5	95	137	–	1500	DO-201AE	-55 to 175	ROHS3
Taiwan Semiconductor Corporation	1V5KE100CA	Active	85.5	95	137	11	1500	DO-201AD	-55 to 175	ROHS3
Diotec Semiconductor	1.5KE100CA	Active	85.5	95	137	11.4	1500	DO-201	-50 to 175	Not applicable
Littelfuse Inc.	1.5KE100CA-B	Active	85.5	95	137	11.1	1500	DO-201	-55 to 175	ROHS3
Comchip Technology	1.5KE100CA-G	Active	85.5	95	137	10.95	1500	DO-201	-55 to 150	ROHS3
Comchip Technology	1.5KE100CA-HF	Active	85.5	95	137	10.95	1500	DO-201	-55 to 150	ROHS3
Microchip Technology	5KP85CAE3/TR13	Active	85	94.4	137	36.5	5000	P600	-55 to 175	ROHS3

Engineering Selection Recommendations

Primary Substitutes (Preferred for Direct Replacement)

The Littelfuse Inc. 1.5KE100CA-B (active product status) provides the most direct functional equivalence to the obsolete Diodes Incorporated part. This substitute maintains identical electrical specifications, package form factor (DO-201), temperature range (-55°C to 175°C), and RoHS3 compliance certification. Peak pulse current of 11.1A aligns with the original 11A specification within normal manufacturing tolerance.

The Taiwan Semiconductor Corporation 1V5KE100CA offers equivalent electrical performance with active product status and full RoHS3 compliance. The DO-201AD package variant is mechanically compatible with standard through-hole PCB layouts. Peak pulse current of 11A matches the original specification exactly.

Secondary Substitutes (Functionally Equivalent with Minor Considerations)

The Diotec Semiconductor 1.5KE100CA maintains all critical electrical parameters and active product status. The operating temperature range extends to -50°C minimum (versus -55°C for the original), which is acceptable for most general-purpose applications. RoHS compliance status is not applicable per vendor specification; verify compliance requirements for your application.

The Comchip Technology 1.5KE100CA-G and 1.5KE100CA-HF both provide electrical equivalence with active product status and RoHS3 compliance. The maximum operating temperature is limited to 150°C (versus 175°C for the original), which may restrict use in high-temperature environments. Peak pulse current of 10.95A is within acceptable tolerance of the 11A specification.

The Micro Commercial Co 1.5KE100CA-TP is electrically equivalent with active product status and RoHS3 compliance. Peak pulse current specification is not provided; confirm current capability with the manufacturer before selection for current-critical applications.

Higher Power Alternative (Different Application Class)

The Microchip Technology 5KP85CAE3/TR13 is a higher-power variant (5kW peak pulse versus 1.5kW) in the P600 package. This part is suitable only for applications requiring increased transient energy absorption. The P600 package is mechanically distinct from DO-201 and requires PCB redesign. Voltage ratings (85V standoff, 94.4V breakdown, 137V clamping) are compatible with the original circuit protection intent. Peak pulse current of 36.5A significantly exceeds the 11A specification and is appropriate only for high-current transient suppression circuits.

Frequently Asked Questions (FAQ)

Q: Can I use the Microchip 5KP85CAE3/TR13 as a direct replacement for the 1.5KE100CA-B?

A: No. While the voltage ratings are compatible, the 5KP85CAE3/TR13 is a different product class with 5kW peak pulse power (versus 1.5kW) and a P600 package (versus DO-201). This part is suitable only for applications requiring higher transient energy handling and requires PCB layout modification. Use this part only if your circuit design specifically calls for increased power dissipation capability.

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

A: All three are axial through-hole packages with compatible mechanical dimensions for standard PCB mounting. DO-201 is the generic designation; DO-201AD and DO-201AE are manufacturer-specific variants with identical electrical performance and interchangeable PCB placement. Package selection does not affect circuit functionality.

Q: Is the Diotec 1.5KE100CA acceptable if RoHS compliance is required?

A: The Diotec part lists RoHS status as "Not applicable" per vendor specification. If your application or supply chain requires explicit RoHS3 certification, select an alternative with confirmed ROHS3 Compliant status (Littelfuse, Taiwan Semiconductor, Comchip, or Microchip variants). Verify compliance documentation with your procurement department.

Q: Why do some substitutes list peak pulse current as "–" (not provided)?

A: The Micro Commercial Co 1.5KE100CA-TP does not specify peak pulse current in the available datasheet. The 1500W power rating and 137V clamping voltage imply current capability in the 10–12A range, but confirm the exact specification with the manufacturer before selecting this part for current-critical applications.

Q: Can I use the Comchip parts if my circuit operates above 150°C?

A: No. The Comchip 1.5KE100CA-G and 1.5KE100CA-HF are rated to 150°C maximum junction temperature, compared to 175°C for the original part. If your application requires operation above 150°C, select the Littelfuse, Taiwan Semiconductor, or Microchip alternatives, which support the full 175°C range.

Q: Are all substitute parts available in the same packaging options (bulk, tape, reel)?

A: No. Packaging availability varies by manufacturer and distributor. The Littelfuse 1.5KE100CA-B is available in bulk; the Micro Commercial Co 1.5KE100CA-TP is supplied in cut tape; Comchip variants are available in tape & box. Verify packaging availability with your supplier to match your assembly process requirements.

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