P4KE13A-B Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The P4KE13A-B is an active Littelfuse Inc. transient voltage suppressor diode designed for general-purpose overvoltage protection applications. This unidirectional zener TVS diode features an 11.1V reverse standoff voltage with an 18.2V maximum clamping voltage and 22.5A peak pulse current capability in a through-hole DO-204AL (DO-41) axial package. The part is ROHS3 compliant and rated for -55°C to 175°C operating temperature range. Equivalent and substitute parts are identified based on matching or closely aligned electrical parameters including reverse standoff voltage, clamping voltage, peak pulse current, power dissipation, and compatible through-hole package configurations.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	11.1	V
Voltage - Breakdown (Min)	12.4	V
Voltage - Clamping (Max) @ Ipp	18.2	V
Current - Peak Pulse (10/1000µs)	22.5	A
Power - Peak Pulse	400	W
Operating Temperature Range	-55 to 175	°C (TJ)
Mounting Type	Through Hole	-
Package / Case	DO-204AL, DO-41, Axial	-
Type	Zener	-
Unidirectional Channels	1	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the P4KE13A-B are grouped based on electrical parameter compatibility within the transient voltage suppressor category. The primary substitution criteria are:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 10.2V to 11.1V range
Voltage - Clamping (Max) @ Ipp: 16.7V to 18.2V range
Current - Peak Pulse (10/1000µs): minimum 22.5A
Power - Peak Pulse: minimum 400W
Unidirectional Channels: 1
Type: Zener
Mounting Type: Through Hole
Operating Temperature Range: -55°C to 175°C minimum

Package Compatibility: Substitutes are available in DO-204AL (DO-41) axial configuration matching the main part, or in DO-204AC (DO-15) axial configuration as higher-power alternatives with equivalent electrical performance.

Compliance Alignment: All substitute parts maintain ROHS3 compliance and are rated for the same operating temperature range, ensuring regulatory and thermal compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ) [V]	Voltage - Clamping (Max) @ Ipp [V]	Current - Peak Pulse (10/1000µs) [A]	Power - Peak Pulse [W]	Package / Case	Operating Temperature [°C]	RoHS Status
P4KE13A-B	Littelfuse Inc.	11.1	18.2	22.5	400	DO-204AL, DO-41	-55 to 175	ROHS3 Compliant
P4KE13A	Taiwan Semiconductor Corporation	11.1	18.2	23	400	DO-204AL, DO-41	-55 to 175	ROHS3 Compliant
P4KE13A-TP	Micro Commercial Co	11.1	18.2	22.5	400	DO-204AL, DO-41	-55 to 175	ROHS3 Compliant
SA11A	Taiwan Semiconductor Corporation	11	18.2	28	500	DO-204AC, DO-15	-55 to 175	ROHS3 Compliant
P6KE13A	Diotec Semiconductor	11.1	18.2	34	600	DO-204AC, DO-15	-50 to 175	ROHS3 Compliant
P4KE12A	Taiwan Semiconductor Corporation	10.2	16.7	25	400	DO-204AL, DO-41	-55 to 175	ROHS3 Compliant
1.5KE12A	Taiwan Semiconductor Corporation	10.2	16.7	94	1500	DO-201AA, DO-27	-55 to 175	ROHS3 Compliant
P6KE12A	Fairchild Semiconductor	10.2	16.7	37	600	DO-204AC, DO-15	-50 to 175	-
SA10A	Taiwan Semiconductor Corporation	10	17	30	500	DO-204AC, DO-15	-55 to 175	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalents (Same Voltage Rating and Package):

P4KE13A and P4KE13A-TP are direct equivalents to P4KE13A-B, maintaining identical reverse standoff voltage (11.1V), clamping voltage (18.2V), and DO-204AL (DO-41) package configuration. Both are ROHS3 compliant and rated for -55°C to 175°C. Selection between these parts depends on packaging format availability: P4KE13A is supplied in Tape & Reel format, while P4KE13A-TP is supplied in Cut Tape format.

Higher Power Alternatives (Same Voltage Rating, Enhanced Current Handling):

SA11A, P6KE13A, and P6KE12A offer increased peak pulse current and power dissipation capabilities while maintaining the 11.1V reverse standoff and 18.2V clamping voltage specifications. These parts use DO-204AC (DO-15) package configuration, which is mechanically compatible with through-hole PCB layouts but differs from the DO-204AL footprint. SA11A and P6KE13A are ROHS3 compliant; P6KE13A maintains the full -55°C to 175°C temperature range.

Lower Voltage Alternatives (Reduced Voltage Rating):

P4KE12A, P6KE12A, SA10A, and 1.5KE12A feature a 10.2V reverse standoff voltage with 16.7V clamping voltage, suitable for applications requiring lower voltage protection thresholds. P4KE12A maintains the DO-204AL (DO-41) package; P6KE12A and SA10A use DO-204AC (DO-15) packages. 1.5KE12A uses DO-201AA (DO-27) package and provides significantly higher power dissipation (1500W) for high-energy transient suppression.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance. Operating temperature range is -55°C to 175°C for most alternatives; P6KE12A and P6KE13A are rated to -50°C minimum, which is acceptable for most general-purpose applications.

Frequently Asked Questions (FAQ)

Q: Can P4KE13A replace P4KE13A-B directly?

A: Yes. P4KE13A is a direct equivalent with identical electrical specifications (11.1V reverse standoff, 18.2V clamping voltage, 23A peak pulse current) and the same DO-204AL (DO-41) package. The primary difference is packaging format: P4KE13A is supplied in Tape & Reel, while P4KE13A-B is supplied in Bulk.

Q: What is the difference between DO-204AL and DO-204AC packages?

A: Both are through-hole axial diode packages with identical lead spacing and PCB footprint compatibility. DO-204AL (DO-41) is the smaller package used in P4KE13A-B and P4KE13A. DO-204AC (DO-15) is a larger package used in higher-power TVS diodes like SA11A and P6KE13A. Both are mechanically interchangeable on standard through-hole PCBs.

Q: Can I use SA11A or P6KE13A instead of P4KE13A-B?

A: Yes, with package considerations. SA11A and P6KE13A maintain the same 11.1V reverse standoff and 18.2V clamping voltage as P4KE13A-B, with higher peak pulse current (28A and 34A respectively) and power dissipation (500W and 600W). Both use DO-204AC (DO-15) packages, which are through-hole compatible but have a different physical footprint than DO-204AL (DO-41). Verify PCB layout compatibility before substitution.

Q: What does "Reverse Standoff Voltage" mean in TVS diode selection?

A: Reverse standoff voltage is the maximum voltage the TVS diode can withstand in its normal operating state without conducting. For P4KE13A-B, this is 11.1V. Selecting a substitute with a different reverse standoff voltage changes the protection threshold and may not be suitable for your application.

Q: Can I use P4KE12A (10.2V) instead of P4KE13A-B (11.1V)?

A: P4KE12A has a lower reverse standoff voltage (10.2V vs. 11.1V) and lower clamping voltage (16.7V vs. 18.2V). This part will conduct at lower voltage levels and is suitable only if your application requires protection at the lower voltage threshold. It is not a direct substitute for P4KE13A-B.

Q: Are all substitute parts ROHS3 compliant?

A: Most substitute parts listed are ROHS3 compliant. P6KE12A (Fairchild Semiconductor) does not specify RoHS status in the provided data. Verify compliance requirements for your specific application before selection.

Q: What is the difference between 400W and 500W power ratings?

A: Power rating indicates the maximum energy the TVS diode can dissipate during a transient event. Higher power ratings (500W, 600W, 1500W) allow the diode to handle larger transient pulses without thermal damage. For general-purpose applications matching P4KE13A-B specifications, 400W is typically sufficient; higher ratings provide additional margin for severe transient conditions.

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