5KP22C-B Equivalent & Substitute Parts

Part Overview

The 5KP22C-B is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., rated for 22V reverse standoff voltage with 5000W peak pulse power handling. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 5KP22C-B operates across -55°C to 175°C and is housed in a P600 axial through-hole package, suitable for general-purpose transient protection applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	5KP22C-B
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Bidirectional Channels	1
Voltage - Reverse Standoff (Typ)	22V
Voltage - Breakdown (Min)	22.91V
Voltage - Clamping (Max) @ Ipp	37.28V
Power - Peak Pulse	5000W (5kW)
Operating Temperature	-55°C ~ 175°C (TJ)
Mounting Type	Through Hole
Package / Case	P600, Axial
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the 5KP22C-B is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 22V nominal
Voltage - Clamping (Max) @ Ipp: Must remain within acceptable transient protection range
Power - Peak Pulse: 5000W (5kW) or compatible lower ratings for reduced transient stress applications
Bidirectional Channels: 1 (single channel protection)
Operating Temperature: -55°C ~ 175°C minimum
Mounting Type: Through Hole
Type: Zener diode

Substitute parts are grouped into two categories:

Category A - Direct Package Equivalents (P600 Axial): Parts maintaining the same P600 axial package, enabling direct mechanical and electrical replacement with minimal circuit board modifications.

Category B - Functional Equivalents (Alternative Packages): Parts with different package types (DO-15, DO-201) that provide equivalent electrical protection but require package-specific board layout considerations.

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	Product Status
5KP22C-B	Littelfuse Inc.	22V	22.91V	37.28V	—	5000W	P600, Axial	-55°C ~ 175°C	Obsolete
5KP22CA	Littelfuse Inc.	22V	24V	35.5V	143.7A	5000W	P600, Axial	-55°C ~ 175°C	Active
5KP22CA-B	Littelfuse Inc.	22V	24V	35.5V	143.7A	5000W	P600, Axial	-55°C ~ 175°C	Active
5KP22CE3/TR13	Microchip Technology	22V	24.4V	39.4V	127A	5000W	P600, Axial	-55°C ~ 175°C	Active
SLD22-018-B	Littelfuse Inc.	22V	24.4V	35.5V	143.7A	5000W	P600, Axial	-55°C ~ 175°C	Active
1.5KE22CA	Taiwan Semiconductor Corporation	18.8V	20.9V	30.6V	51A	1500W	DO-201AA, Axial	-55°C ~ 175°C	Active
1.5KE27CA	Taiwan Semiconductor Corporation	23.1V	25.7V	37.5V	42A	1500W	DO-201AA, Axial	-55°C ~ 175°C	Active
P6KE24CA	Fairchild Semiconductor	20.5V	22.8V	33.2V	19A	600W	DO-15, Axial	-50°C ~ 175°C	Active
P6KE27CA	Diotec Semiconductor	23.1V	25.7V	37.5V	16.8A	600W	DO-15, Axial	-50°C ~ 175°C	Active
1N6153	Microchip Technology	22.8V	28.5V	41.6V	36A	1500W	C, Axial	-55°C ~ 175°C	Active

Engineering Selection Recommendations

Primary Substitutes (Active Status, P600 Package):

5KP22CA and 5KP22CA-B are direct active equivalents from Littelfuse Inc., maintaining identical package geometry, operating temperature range, and 5000W power rating. Both are ROHS3 compliant and feature lower clamping voltage (35.5V) compared to the obsolete 5KP22C-B (37.28V), providing improved transient suppression performance. These parts are recommended for direct replacement in existing designs.

5KP22CE3/TR13 (Microchip Technology) maintains the P600 package and 5000W power rating with 22V standoff voltage. This part is supplied in Tape & Reel packaging and exhibits slightly higher clamping voltage (39.4V). ROHS3 compliance and full temperature range support are confirmed.

SLD22-018-B (Littelfuse Inc.) is an automotive-grade alternative with AEC-Q101 qualification, P600 package, and 5000W power rating. This part is suitable for applications requiring automotive-level reliability and traceability.

Secondary Substitutes (Reduced Power Rating):

1.5KE22CA and 1.5KE27CA (Taiwan Semiconductor Corporation) provide 1500W peak pulse power in DO-201 axial packages. These parts are suitable for applications where transient stress is lower than the original 5000W specification. The 1.5KE27CA exhibits clamping voltage (37.5V) closer to the original part specification.

Lower Power Alternatives (600W Rating):

P6KE24CA (Fairchild Semiconductor) and P6KE27CA (Diotec Semiconductor) are 600W-rated TVS diodes in DO-15 packages. These parts are applicable only to circuits with significantly reduced transient energy requirements and are not recommended as direct replacements for 5000W applications.

Non-Compliant Alternative:

1N6153 (Microchip Technology) is RoHS non-compliant and should be selected only when legacy design requirements mandate this specific part number.

Frequently Asked Questions (FAQ)

Q: Can 5KP22CA directly replace 5KP22C-B without circuit modifications?

A: Yes. Both parts share identical P600 axial package geometry, 22V standoff voltage, 5000W power rating, and -55°C to 175°C operating temperature range. Board layout and component spacing require no changes. The 5KP22CA exhibits lower clamping voltage (35.5V vs. 37.28V), which improves transient suppression performance.

Q: What is the difference between 5KP22CA and 5KP22CA-B?

A: Both parts are electrically and mechanically identical. The suffix "-B" indicates bulk packaging, while 5KP22CA is supplied in Cut Tape. Selection depends on procurement and assembly requirements. Electrical performance is equivalent.

Q: Can I use 1.5KE22CA as a substitute in a 5000W transient environment?

A: No. The 1.5KE22CA is rated for 1500W peak pulse power, one-third the original specification. This part is suitable only for applications with confirmed lower transient stress levels. Using this part in a 5000W environment risks component failure and circuit damage.

Q: Why do P6KE24CA and P6KE27CA have different package types?

A: These parts use DO-15 (DO-204AC) axial packages instead of P600. While electrically functional for transient suppression, the different package dimensions require board layout modifications. These parts are recommended only when P600 packages are unavailable and circuit board redesign is acceptable.

Q: Is SLD22-018-B suitable for automotive applications?

A: Yes. SLD22-018-B carries AEC-Q101 automotive qualification and is designed for automotive-grade reliability. This part is recommended for automotive and safety-critical applications requiring documented traceability and qualification.

Q: What compliance certifications apply to substitute parts?

A: 5KP22CA, 5KP22CA-B, 5KP22CE3/TR13, 1.5KE22CA, 1.5KE27CA, P6KE24CA, and P6KE27CA are ROHS3 compliant. SLD22-018-B is ROHS3 compliant with AEC-Q101 automotive qualification. 1N6153 is RoHS non-compliant and should be avoided in new designs unless legacy requirements mandate its use.

Q: Can I mix different substitute parts in the same circuit?

A: No. All TVS diodes in a protection circuit should be identical to ensure consistent clamping voltage and transient response characteristics. Mixing different part numbers may result in unequal voltage distribution and compromised protection.

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