P6KE22A Transient Voltage Suppressor Diode - Equivalent & Substitute Parts

Part Overview

The P6KE22A is a unidirectional Zener transient voltage suppressor (TVS) diode designed for general-purpose overvoltage protection applications. Manufactured by Diodes Incorporated, this component features an 18.8V reverse standoff voltage and 30.6V maximum clamping voltage with 20A peak pulse current capability in a through-hole DO-15 package. The original part is classified as obsolete, necessitating identification of functionally equivalent alternatives from active manufacturers to maintain design continuity and ensure supply chain availability.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	18.8	V
Voltage - Breakdown (Min)	20.9	V
Voltage - Clamping (Max) @ Ipp	30.6	V
Current - Peak Pulse (10/1000µs)	20	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 175	°C (TJ)
Mounting Type	Through Hole	—
Package / Case	DO-204AC, DO-15, Axial	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitution of the P6KE22A is determined by strict equivalence across the following critical electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 18.8V
Voltage - Breakdown (Min): 20.9V
Voltage - Clamping (Max) @ Ipp: 30.6V
Current - Peak Pulse (10/1000µs): 20A (or within 0.4A tolerance)
Power - Peak Pulse: 600W
Type: Zener, Unidirectional
Mounting Type: Through Hole
Package / Case: DO-204AC, DO-15, or Axial variants

All identified substitute parts maintain these electrical specifications. Variations in peak pulse current (19.61A to 20A) and operating temperature ranges remain within acceptable engineering tolerances for general-purpose TVS applications. Package designations (DO-15, DO-204AC, Axial) are mechanically and electrically interchangeable for through-hole mounting.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Vwm (Typ) [V]	Vbr (Min) [V]	Vc (Max) @ Ipp [V]	Ipp [A]	Ppp [W]	Tj Range [°C]	Package	RoHS
P6KE22A-T	Diodes Incorporated	Obsolete	18.8	20.9	30.6	20	600	-55 to 175	DO-15	ROHS3
P6KE22A-AP	Micro Commercial Co	Active	18.8	20.9	30.6	20	600	-55 to 175	DO-15	—
P6KE22A-BP	Micro Commercial Co	Active	18.8	20.9	30.6	20	600	-55 to 175	DO-15	—
P6KE22A	Fairchild Semiconductor	Active	18.8	20.9	30.6	20	600	-50 to 175	DO-15 (DO-204AC)	—
P6KE22A-B	Littelfuse Inc.	Active	18.8	20.9	30.6	19.9	600	-55 to 175	DO-204AC (DO-15)	ROHS3
P6KE22A-G	Comchip Technology	Active	18.8	20.9	30.6	19.61	600	-55 to 150	DO-15	ROHS3
P6KE22A-TP	Micro Commercial Co	Active	18.8	20.9	30.6	20	600	-55 to 175	DO-15	—
P6KE22AE3/TR13	Microsemi Corporation	Active	18.8	20.9	30.6	20	600	-65 to 150	Axial	ROHS3
TP6KE22A	Littelfuse Inc.	Active	18.8	20.9	30.6	19.9	600	-55 to 175	DO-204AC (DO-15)	ROHS3

Engineering Selection Recommendations

All substitute parts listed maintain full electrical equivalence to the P6KE22A-T across voltage, current, and power specifications. Selection among active alternatives should prioritize the following factors:

Product Status & Availability: All substitute parts carry Active product status, ensuring ongoing supply chain availability and manufacturing support. The original P6KE22A-T (Obsolete) should be replaced with an active equivalent.

Compliance & Certifications: Parts designated ROHS3 Compliant (P6KE22A-B, P6KE22A-G, P6KE22AE3/TR13, TP6KE22A) meet current environmental regulations. Littelfuse TP6KE22A includes AEC-Q101 automotive qualification, suitable for automotive-grade applications.

Operating Temperature Range: Most substitutes support -55°C to 175°C. Comchip P6KE22A-G and Microsemi P6KE22AE3/TR13 have reduced upper temperature limits (-55°C to 150°C and -65°C to 150°C respectively), acceptable for general-purpose applications but not for extended high-temperature environments.

Package Compatibility: DO-15 and DO-204AC packages are mechanically and electrically interchangeable for through-hole mounting. Microsemi P6KE22AE3/TR13 uses Axial package format, suitable for applications requiring axial lead configuration.

Peak Pulse Current Tolerance: Littelfuse (P6KE22A-B, TP6KE22A) and Comchip (P6KE22A-G) specify 19.9A and 19.61A respectively, representing 0.1A and 0.39A reductions from the 20A specification. These variations remain within acceptable engineering tolerance for transient suppression applications.

Frequently Asked Questions (FAQ)

Q: Can P6KE22A-B from Littelfuse be used as a direct replacement for the obsolete P6KE22A-T?

A: Yes. P6KE22A-B maintains identical voltage specifications (18.8V Vwm, 20.9V Vbr, 30.6V Vc) and peak pulse power (600W). The peak pulse current specification of 19.9A versus 20A represents a 0.1A difference within acceptable tolerance. Both support -55°C to 175°C operating range and are ROHS3 compliant.

Q: What is the difference between DO-15 and DO-204AC packages?

A: DO-15 and DO-204AC are equivalent package designations for the same through-hole axial lead component. Both accommodate identical lead spacing and mounting footprints. Selection between them depends on PCB design and assembly equipment compatibility, not electrical performance.

Q: Are Micro Commercial Co P6KE22A-AP, P6KE22A-BP, and P6KE22A-TP interchangeable?

A: Yes. All three Micro Commercial Co variants maintain identical electrical specifications: 18.8V Vwm, 20.9V Vbr, 30.6V Vc, 20A Ipp, and 600W Ppp across -55°C to 175°C. Differences exist only in packaging format (Bulk) and internal manufacturing codes. Selection among these variants depends on procurement and inventory requirements.

Q: Why does Comchip P6KE22A-G specify a lower operating temperature maximum (-55°C to 150°C)?

A: The reduced upper temperature limit reflects Comchip's manufacturing and qualification specifications. For applications operating below 150°C, this part is fully equivalent. Applications requiring operation above 150°C should select alternatives with -55°C to 175°C ratings.

Q: Is TP6KE22A from Littelfuse suitable for automotive applications?

A: Yes. TP6KE22A carries AEC-Q101 automotive qualification and Automotive grade designation, making it suitable for automotive-grade transient suppression. It maintains identical electrical specifications to the original P6KE22A-T and is ROHS3 compliant.

Q: What is the significance of the peak pulse current tolerance (19.61A to 20A) across different manufacturers?

A: Peak pulse current tolerance reflects manufacturing process variations across suppliers. All specified values (19.61A, 19.9A, 20A) deliver equivalent transient suppression performance for general-purpose applications. The maximum clamping voltage (30.6V) and power dissipation (600W) remain constant, ensuring consistent circuit protection.

Q: Can the Microsemi P6KE22AE3/TR13 with Axial package replace DO-15 variants?

A: Electrically, yes. The Axial package format is mechanically different from DO-15/DO-204AC, requiring different PCB footprints and assembly procedures. Selection depends on PCB design compatibility and assembly equipment capability, not electrical performance.

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