5KP210C-B Equivalent & Substitute Parts

Part Overview

The 5KP210C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This bidirectional Zener diode features a 210V reverse standoff voltage and 366.98V maximum clamping voltage with 5kW peak pulse power handling. The part is currently obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Manufacturer Part Number	5KP210C-B
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Bidirectional Channels	1
Voltage - Reverse Standoff (Typ)	210V
Voltage - Breakdown (Min)	220.95V
Voltage - Clamping (Max) @ Ipp	366.98V
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 of the 5KP210C-B is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff: 210V ± tolerance
Voltage - Clamping (Max) @ Ipp: 344V–366.98V range
Power - Peak Pulse: minimum 5000W (5kW) for direct replacement; lower power ratings acceptable for reduced surge environments
Bidirectional Channels: 1
Type: Zener
Mounting Type: Through Hole
Operating Temperature Range: -55°C minimum to 150°C minimum

Package Compatibility: The 5KP210C-B uses P600 axial package. Substitutes may use alternative through-hole axial packages (DO-201, DO-204AL, DO-15) provided mechanical fit and lead spacing are verified for the application circuit board layout.

Substitute parts are grouped into two categories:

Category 1 – Direct Series Substitutes (Same Manufacturer, Same Base Series):

5KP210CA and 5KP210CA-B (Littelfuse 5KP series)
These maintain identical reverse standoff voltage (210V) and clamping voltage (349.5V), with active product status and full RoHS3 compliance.

Category 2 – Cross-Manufacturer Equivalents (Different Base Series, Comparable Electrical Performance):

1.5KE250CA, 1.5KE250CA-G (Taiwan Semiconductor, Comchip Technology)
P4KE250CA, P4KE250CA-G, P4KE250CA-AP, P4KE250CA-BP (Taiwan Semiconductor, Comchip Technology, Micro Commercial Co)
P6KE250CA (Fairchild Semiconductor)
AK10-200C-BP (Micro Commercial Co)

These alternatives provide comparable clamping voltage (344V–330V) and reverse standoff voltage (214V–200V) with varying peak pulse current ratings and power dissipation capabilities. Selection depends on specific application surge current requirements and thermal design constraints.

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	RoHS Status
5KP210C-B	Littelfuse Inc.	210V	220.95V	366.98V	—	5000W (5kW)	P600, Axial	-55°C ~ 175°C	Obsolete	ROHS3 Compliant
5KP210CA	Littelfuse Inc.	210V	233V	349.5V	14.6A	5000W (5kW)	P600, Axial	-55°C ~ 175°C	Active	ROHS3 Compliant
5KP210CA-B	Littelfuse Inc.	210V	233V	349.5V	14.6A	5000W (5kW)	P600, Axial	-55°C ~ 175°C	Active	ROHS3 Compliant
1.5KE250CA	Taiwan Semiconductor Corporation	214V	237V	344V	4.5A	1500W (1.5kW)	DO-201AA, DO-27, Axial	-55°C ~ 175°C	Active	ROHS3 Compliant
1.5KE250CA-G	Comchip Technology	214V	237.5V	344V	4.36A	1500W (1.5kW)	DO-201AA, DO-27, Axial	-55°C ~ 150°C	Active	ROHS3 Compliant
P4KE250CA	Taiwan Semiconductor Corporation	214V	237V	344V	1.2A	400W	DO-204AL, DO-41, Axial	-55°C ~ 175°C	Active	ROHS3 Compliant
P4KE250CA-G	Comchip Technology	214V	237V	344V	1.16A	400W	DO-204AL, DO-41, Axial	-55°C ~ 150°C	Active	ROHS3 Compliant
P4KE250CA-AP	Micro Commercial Co	214V	237V	344V	1.2A	400W	DO-204AL, DO-41, Axial	-55°C ~ 175°C	Active	—
P4KE250CA-BP	Micro Commercial Co	214V	237V	344V	1.2A	400W	DO-204AL, DO-41, Axial	-55°C ~ 175°C	Active	—
P6KE250CA	Fairchild Semiconductor	214V	237V	344V	1.8A	600W	DO-204AC, DO-15, Axial	-50°C ~ 175°C	Active	—
AK10-200C-BP	Micro Commercial Co	200V	222V	330V	10000A (10kA) (8/20µs)	—	Axial, Right Angle Bend (24.15mm Center)	-55°C ~ 150°C	Active	—

Engineering Selection Recommendations

Tier 1 – Preferred Direct Replacements:

5KP210CA and 5KP210CA-B are the primary substitutes for 5KP210C-B. Both maintain identical reverse standoff voltage (210V), comparable clamping voltage (349.5V vs. 366.98V), and equivalent 5kW peak pulse power rating. Both are active products with ROHS3 compliance and full operating temperature range (-55°C to 175°C). These parts require no circuit redesign and provide direct mechanical and electrical compatibility within the P600 axial package footprint.

Tier 2 – Cross-Manufacturer Equivalents with Reduced Power Rating:

1.5KE250CA and 1.5KE250CA-G provide comparable clamping voltage (344V) and reverse standoff voltage (214V) with 1500W peak pulse power. These are suitable for applications where surge current is limited to 4.5A or lower. Both maintain -55°C to 175°C operating range (1.5KE250CA) or -55°C to 150°C (1.5KE250CA-G). Package transition from P600 to DO-201 requires mechanical verification.

Tier 3 – Lower Power Cross-Manufacturer Alternatives:

P4KE250CA, P4KE250CA-G, P4KE250CA-AP, and P4KE250CA-BP offer 344V clamping voltage with 400W peak pulse power and 1.2A peak pulse current. These are applicable only to low-surge-current applications. P6KE250CA provides intermediate 600W power rating with 1.8A peak pulse current. All require package transition to DO-204AL (DO-41) or DO-15 formats.

Tier 4 – High Peak Current Alternative:

AK10-200C-BP provides 10kA peak pulse current (8/20µs) with 330V clamping voltage and 200V reverse standoff voltage. This part is suitable only for high-current surge protection applications and requires mechanical verification due to non-standard right-angle bend package configuration.

Compliance Considerations:

All recommended Tier 1 and Tier 2 substitutes maintain ROHS3 compliance. Tier 3 and Tier 4 alternatives from Micro Commercial Co and Fairchild Semiconductor lack documented RoHS status in provided specifications and require compliance verification before deployment in regulated applications.

Frequently Asked Questions (FAQ)

Q: Can 5KP210CA directly replace 5KP210C-B without circuit modification?

A: Yes. Both parts share identical reverse standoff voltage (210V), equivalent clamping voltage (349.5V vs. 366.98V), and identical 5kW peak pulse power rating. Both use P600 axial through-hole packaging. No circuit redesign is required.

Q: What is the primary difference between 5KP210CA and 5KP210CA-B?

A: The difference is packaging format only. 5KP210CA is supplied in Cut Tape (CT), while 5KP210CA-B is supplied in Bulk. Electrical specifications are identical. Selection depends on procurement and assembly requirements.

Q: Can I use 1.5KE250CA as a substitute if my application has limited surge current?

A: Yes, provided peak surge current does not exceed 4.5A. The 1.5KE250CA maintains comparable clamping voltage (344V) and reverse standoff voltage (214V) with full -55°C to 175°C operating range. However, the package transitions from P600 to DO-201, requiring mechanical verification for circuit board layout compatibility.

Q: Why do P4KE250CA variants have lower power ratings than the original 5KP210C-B?

A: P4KE250CA series is rated for 400W peak pulse power versus 5000W for 5KP210C-B. This reflects lower peak pulse current capability (1.2A vs. unspecified for 5KP210C-B). P4KE250CA substitutes are suitable only for applications with peak surge currents below 1.2A.

Q: What is the significance of the AK10-200C-BP's 10kA peak pulse current rating?

A: AK10-200C-BP is designed for high-current surge protection applications, such as power line interface protection. The 10kA (8/20µs) rating indicates capability to suppress very high transient currents. However, reverse standoff voltage (200V) and clamping voltage (330V) are lower than the original 5KP210C-B, and the right-angle bend package requires mechanical verification.

Q: Are all substitute parts RoHS3 compliant?

A: Littelfuse 5KP210CA variants and Taiwan Semiconductor 1.5KE250CA are confirmed ROHS3 compliant. Comchip Technology 1.5KE250CA-G and P4KE250CA-G are ROHS3 compliant. Micro Commercial Co and Fairchild Semiconductor variants lack documented RoHS status in provided specifications. Compliance verification is required before use in regulated applications.

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

A: Yes, provided all selected parts meet the application's electrical requirements (reverse standoff voltage, clamping voltage, peak pulse current, and power dissipation). However, consistency within a single design is recommended to simplify procurement, qualification, and field service documentation.

Q: What package considerations apply when transitioning from P600 to DO-201 or DO-41?

A: P600 is a larger axial package than DO-201 (DO-27) or DO-41 (DO-204AL). Physical lead spacing and component height differ. Circuit board layout, lead bend radius, and thermal dissipation paths must be re-evaluated. Mechanical fit verification is mandatory before production deployment.

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