5KP17CA-B Equivalent & Substitute Parts

Part Overview

The 5KP17CA-B is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This through-hole component features a 17V reverse standoff voltage, 27.6V maximum clamping voltage, and 5000W peak pulse power rating in a P600 axial package. The part is currently active and in production with 858 units in stock. Equivalent and substitute parts are identified based on matching electrical characteristics and compatible package configurations for applications requiring transient voltage suppression.

Key Parameters

Parameter	5KP17CA-B
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Bidirectional Channels	1
Voltage - Reverse Standoff (Typ)	17V
Voltage - Breakdown (Min)	18.9V
Voltage - Clamping (Max) @ Ipp	27.6V
Current - Peak Pulse (10/1000µs)	184.8A
Power - Peak Pulse	5000W (5kW)
Operating Temperature	-55°C ~ 175°C (TJ)
Mounting Type	Through Hole
Package / Case	P600, Axial
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution for the 5KP17CA-B is determined by the following critical parameters: reverse standoff voltage (17V nominal), breakdown voltage range (18.9V minimum), maximum clamping voltage (27.6V), peak pulse current capability (184.8A), and peak pulse power dissipation (5000W). The 5KP series is characterized by high current handling and power dissipation in a P600 package.

Substitute parts are grouped into two categories:

Category 1: Same Series, Same Package (5KP17CA) Parts maintaining identical electrical specifications and P600 package configuration, differing only in packaging format (Cut Tape vs. Bulk).

Category 2: Equivalent Voltage Rating, Alternative Packages (1.5KE and P6KE Series) Parts with comparable voltage ratings (15.3V to 17.1V standoff, 25.2V to 27.7V clamping) but reduced power dissipation (600W to 1500W) and lower peak pulse current (22A to 60A), available in DO-201 or DO-15 packages. These substitutes are suitable for applications where the full 5000W power rating is not required.

Category 3: Lower Voltage Rating (SA15CA Series) Parts with 15V standoff voltage and 24.4V clamping voltage, 500W power rating, and 20.9A to 21A peak pulse current in DO-15 packages. These are applicable only when the lower voltage threshold is acceptable for the circuit design.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Operating Temperature	RoHS Status	Product Status
5KP17CA-B	Littelfuse Inc.	17V	18.9V	27.6V	184.8A	5000W	P600, Axial	-55°C ~ 175°C	ROHS3 Compliant	Active
5KP17CA	Littelfuse Inc.	17V	18.9V	27.6V	184.8A	5000W	P600, Axial	-55°C ~ 175°C	ROHS3 Compliant	Active
1.5KE18CA	Taiwan Semiconductor Corporation	15.3V	17.1V	25.5V	60A	1500W	DO-201AA, DO-27, Axial	-55°C ~ 175°C	ROHS3 Compliant	Active
1.5KE20CA	Taiwan Semiconductor Corporation	17.1V	19V	27.7V	56A	1500W	DO-201AA, DO-27, Axial	-55°C ~ 175°C	ROHS3 Compliant	Active
P6KE18CA	Diotec Semiconductor	15.3V	17.1V	25.2V	25A	600W	DO-204AC, DO-15, Axial	-50°C ~ 175°C	Not applicable	Active
P6KE20CA	Fairchild Semiconductor	17.1V	19V	27.7V	22A	600W	DO-204AC, DO-15, Axial	-50°C ~ 175°C	Not specified	Active
SA15CA	Taiwan Semiconductor Corporation	15V	16.7V	24.4V	21A	500W	DO-204AC, DO-15, Axial	-55°C ~ 175°C	ROHS3 Compliant	Active
SA15CA-B	Littelfuse Inc.	15V	16.7V	24.4V	20.9A	500W	DO-204AC, DO-15, Axial	-55°C ~ 175°C	ROHS3 Compliant	Active

Engineering Selection Recommendations

Primary Substitute: 5KP17CA This part is the direct equivalent to 5KP17CA-B, differing only in packaging format (Cut Tape vs. Bulk). It maintains identical electrical specifications, power rating, and package configuration. Both parts are ROHS3 compliant and active in production. Selection between these two depends solely on packaging and inventory requirements.

Secondary Substitutes: 1.5KE20CA The 1.5KE20CA provides the closest voltage matching (17.1V standoff, 27.7V clamping) among reduced-power alternatives. It is ROHS3 compliant and active. However, peak pulse current is reduced to 56A and power dissipation to 1500W. This substitute is applicable only when circuit requirements do not exceed these power and current limits. Package configuration changes from P600 to DO-201.

Tertiary Substitutes: P6KE20CA, 1.5KE18CA These parts offer voltage ratings within acceptable ranges but with further reductions in power handling (600W to 1500W) and peak pulse current (22A to 60A). P6KE20CA is available from Fairchild Semiconductor in DO-15 package. 1.5KE18CA is available from Taiwan Semiconductor Corporation in DO-201 package. Both are active products. Selection requires confirmation that reduced power and current ratings meet application requirements.

Lower Voltage Alternatives: SA15CA, SA15CA-B These parts operate at 15V standoff voltage with 24.4V clamping voltage, 500W power rating, and approximately 21A peak pulse current. Both are ROHS3 compliant and active. SA15CA-B is manufactured by Littelfuse Inc. in Bulk packaging. These substitutes are suitable only when the circuit design tolerates the lower voltage threshold.

Frequently Asked Questions (FAQ)

Q: Can 5KP17CA (Cut Tape) directly replace 5KP17CA-B (Bulk)? A: Yes. Both parts are electrically and mechanically identical. The difference is packaging format only. 5KP17CA is supplied in Cut Tape format while 5KP17CA-B is supplied in Bulk. Selection depends on assembly process requirements and inventory management.

Q: What are the limitations when substituting with 1.5KE20CA? A: The 1.5KE20CA maintains comparable voltage ratings (17.1V standoff, 27.7V clamping) but reduces peak pulse current from 184.8A to 56A and power dissipation from 5000W to 1500W. The package changes from P600 to DO-201. Substitution is valid only if the application does not require the higher current and power handling of the original part.

Q: Are P6KE series parts suitable replacements? A: P6KE20CA provides voltage matching (17.1V standoff, 27.7V clamping) but with significant reductions: peak pulse current drops to 22A and power dissipation to 600W. Package changes to DO-15. This substitute is applicable only for low-power transient suppression applications. Operating temperature range is also reduced to -50°C to 175°C.

Q: What is the difference between SA15CA and SA15CA-B? A: Both parts have identical electrical specifications (15V standoff, 24.4V clamping, 500W power, ~21A peak pulse current) and DO-15 package configuration. SA15CA is manufactured by Taiwan Semiconductor Corporation while SA15CA-B is manufactured by Littelfuse Inc. in Bulk packaging. Both are ROHS3 compliant and active. Selection depends on manufacturer preference and packaging requirements.

Q: Can I use SA15CA as a substitute for 5KP17CA-B? A: SA15CA operates at a lower voltage threshold (15V standoff vs. 17V) with reduced power handling (500W vs. 5000W) and lower peak pulse current (21A vs. 184.8A). Substitution is valid only if the circuit design accepts the lower voltage rating and does not require the higher power dissipation and current handling capabilities.

Q: What package compatibility issues should I consider? A: The 5KP17CA-B uses a P600 axial package. Substitutes use either DO-201 (1.5KE series) or DO-15 (P6KE and SA series) packages. These are physically different and require PCB layout modifications. Verify that the alternative package fits the available board space and mounting configuration before selection.

Q: Are all substitute parts ROHS3 compliant? A: The 5KP17CA-B, 5KP17CA, 1.5KE18CA, 1.5KE20CA, SA15CA, and SA15CA-B are all ROHS3 compliant. P6KE18CA is marked as "Not applicable" for RoHS status. P6KE20CA does not specify RoHS status. Verify compliance requirements for your application before selecting P6KE series parts.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message