MP6KE6.8AE3 Equivalent & Substitute Parts

Part Overview

The MP6KE6.8AE3 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This component features a 5.8V reverse standoff voltage with a 10.5V maximum clamping voltage and 57A peak pulse current capability. The device is housed in a T-18 axial through-hole package and is qualified to MIL-PRF-19500 military standards. The part maintains active product status with 961 units currently in stock. Substitute parts are identified to address packaging preferences, compliance requirements, or inventory availability while maintaining equivalent electrical performance.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	5.8	V
Voltage - Breakdown (Min)	6.45	V
Voltage - Clamping (Max) @ Ipp	10.5	V
Current - Peak Pulse (10/1000µs)	57	A
Power - Peak Pulse	600	W
Operating Temperature Range	-65°C to 150°C	TJ
Type	Zener	—
Unidirectional Channels	1	—
Mounting Type	Through Hole	—

Substitute Part Grouping Explanation

Substitution of the MP6KE6.8AE3 is determined by electrical parameter equivalence across the following critical specifications:

Electrical Equivalence Criteria:

Voltage - Reverse Standoff (Typ): 5.8V
Voltage - Breakdown (Min): 6.45V
Voltage - Clamping (Max) @ Ipp: 10.5V
Current - Peak Pulse (10/1000µs): 57A
Power - Peak Pulse: 600W
Type: Zener, Unidirectional (1 channel)

Mechanical Compatibility Criteria:

Mounting Type: Through Hole
Package Category: Axial leaded

The P6KE6.8A manufactured by HY Electronic (Cayman) Limited satisfies all electrical equivalence criteria and maintains through-hole axial mounting compatibility. Package variation from T-18 to DO-15 does not affect electrical performance and represents a standard industry substitution within the axial through-hole category.

Parameter Comparison

Parameter	MP6KE6.8AE3 (Microchip)	P6KE6.8A (HY Electronic)	Match Status
Voltage - Reverse Standoff (Typ)	5.8V	5.8V	Equivalent
Voltage - Breakdown (Min)	6.45V	6.45V	Equivalent
Voltage - Clamping (Max) @ Ipp	10.5V	10.5V	Equivalent
Current - Peak Pulse (10/1000µs)	57A	57A	Equivalent
Power - Peak Pulse	600W	600W	Equivalent
Type	Zener	Zener	Equivalent
Unidirectional Channels	1	1	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Operating Temperature Range	-65°C to 150°C	-55°C to 150°C	P6KE6.8A: Reduced low-temperature range
Package / Case	T-18, Axial	DO-204AC, DO-15, Axial	Different package designation, same form factor category
RoHS Status	RoHS non-compliant	ROHS3 Compliant	P6KE6.8A: Enhanced compliance
Product Status	Active	Active	Equivalent

Engineering Selection Recommendations

MP6KE6.8AE3 (Microchip Technology) is the primary selection when:

Military-grade qualification per MIL-PRF-19500 is required
Operating temperature range of -65°C to 150°C is specified
RoHS non-compliant designs are acceptable or required by legacy specifications
T-18 package footprint is mandated by existing PCB layouts

P6KE6.8A (HY Electronic) is the appropriate substitute when:

ROHS3 compliance is a design requirement
Operating temperature minimum of -55°C satisfies application requirements
DO-15 axial package footprint is compatible with circuit board design
Higher inventory availability (20,220 units) supports production timelines
Military qualification is not a contractual requirement

Both parts deliver identical electrical performance for transient voltage suppression in general-purpose applications. Selection between them depends on compliance mandates, temperature specifications, and package constraints specific to the end application.

Frequently Asked Questions (FAQ)

Q: Can P6KE6.8A replace MP6KE6.8AE3 in all applications?

A: P6KE6.8A provides electrical equivalence across all critical TVS parameters (voltage clamping, peak pulse current, and power dissipation). Substitution is valid when the operating temperature minimum of -55°C meets application requirements and ROHS3 compliance is acceptable. Military-grade qualification per MIL-PRF-19500 is not provided by the substitute part.

Q: What is the difference between T-18 and DO-15 packages?

A: Both T-18 and DO-15 are axial through-hole package designations for diodes. They represent different industry naming conventions for mechanically similar components. Physical dimensions and lead spacing may vary slightly; PCB layout compatibility must be verified against specific package drawings.

Q: Does the operating temperature range difference affect substitution?

A: The MP6KE6.8AE3 operates from -65°C to 150°C, while P6KE6.8A operates from -55°C to 150°C. If the application requires operation below -55°C, only the MP6KE6.8AE3 is suitable. For applications within -55°C to 150°C, both parts are functionally equivalent.

Q: Why does RoHS compliance differ between these parts?

A: MP6KE6.8AE3 is RoHS non-compliant, while P6KE6.8A is ROHS3 compliant. This reflects different manufacturing processes and material compositions. Selection depends on end-product regulatory requirements and customer specifications.

Q: Are the electrical specifications guaranteed to be identical?

A: Yes. Both parts share identical specifications for reverse standoff voltage (5.8V), breakdown voltage (6.45V minimum), clamping voltage (10.5V maximum), peak pulse current (57A), and peak pulse power (600W). These parameters determine TVS performance in circuit protection applications.

Q: What inventory considerations apply to these parts?

A: MP6KE6.8AE3 has 961 units in stock, while P6KE6.8A has 20,220 units available. For high-volume production or time-sensitive requirements, P6KE6.8A availability may provide supply chain advantages.

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