KA7906TU Equivalent & Substitute Parts

Part Overview

The KA7906TU is a linear voltage regulator IC manufactured by onsemi, designed to provide a fixed negative 6V output at 1A current capacity in a TO-220-3 through-hole package. This device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The KA7906TU serves applications requiring stable negative voltage regulation with integrated over-temperature and short-circuit protection.

Key Parameters

Parameter	Value
Output Configuration	Negative
Output Type	Fixed
Output Voltage	-6V
Output Current	1A
Input Voltage (Max)	-35V
Voltage Dropout (Max)	2V @ 1A (Typ)
Package Type	TO-220-3
Mounting Type	Through Hole
Operating Temperature Range	0°C ~ 125°C
Protection Features	Over Temperature, Short Circuit

Substitute Part Grouping Explanation

Substitute parts for the KA7906TU are qualified based on the following electrical and mechanical parameters:

Output Configuration & Voltage: Negative output at fixed -6V
Current Rating: 1A output capacity
Input Voltage Range: Maximum -35V input tolerance
Package & Mounting: TO-220-3 through-hole configuration
Operating Temperature: 0°C ~ 125°C range
Protection Features: Over-temperature and short-circuit protection capability

The identified substitutes—MC7906CTG (onsemi) and MC7906CT-BP (Micro Commercial Co)—meet all core electrical specifications and package requirements. Both devices maintain the same output voltage, current rating, input voltage tolerance, and operating temperature range as the KA7906TU.

Parameter Comparison

Parameter	KA7906TU	MC7906CTG	MC7906CT-BP
Manufacturer	onsemi	onsemi	Micro Commercial Co
Output Configuration	Negative	Negative	Negative
Output Voltage	-6V	-6V	-6V
Output Current	1A	1A	1A
Input Voltage (Max)	-35V	-35V	-35V
Voltage Dropout (Max)	2V @ 1A (Typ)	1.3V @ 1A (Typ)	1.1V @ 1A (Typ)
PSRR	60dB (120Hz)	65dB (120Hz)	60dB (120Hz)
Package / Case	TO-220-3	TO-220-3	TO-220-3
Mounting Type	Through Hole	Through Hole	Through Hole
Operating Temperature	0°C ~ 125°C	0°C ~ 125°C	0°C ~ 125°C
Product Status	Obsolete	Active	Active
Protection Features	Over Temperature, Short Circuit	Over Current, Over Temperature	Over Temperature, Short Circuit

Engineering Selection Recommendations

MC7906CTG (onsemi) is the primary substitute for the KA7906TU. Both devices share the same manufacturer lineage, ensuring design continuity. The MC7906CTG is actively produced and RoHS3 compliant, providing long-term supply assurance. This part demonstrates improved voltage dropout performance (1.3V vs 2V) and enhanced PSRR (65dB vs 60dB), offering superior electrical characteristics while maintaining full functional compatibility.

MC7906CT-BP (Micro Commercial Co) serves as an alternative substitute with active product status. This part exhibits the lowest voltage dropout specification (1.1V @ 1A) among the three options and includes RoHS3 compliance. The MC7906CT-BP maintains identical output voltage, current rating, and package configuration, with equivalent protection features to the original KA7906TU.

Both substitutes are actively manufactured and available in production quantities, eliminating obsolescence concerns associated with the KA7906TU.

Frequently Asked Questions (FAQ)

Q: Can MC7906CTG and MC7906CT-BP be used interchangeably with KA7906TU?

A: Yes. Both substitutes meet the core electrical specifications: -6V fixed output, 1A current capacity, -35V maximum input voltage, TO-220-3 package, and 0°C ~ 125°C operating range. Pin configuration and mounting footprint are identical.

Q: What is the difference in voltage dropout between these parts?

A: The KA7906TU specifies 2V dropout at 1A. The MC7906CTG reduces this to 1.3V, and the MC7906CT-BP further reduces it to 1.1V. Lower dropout voltage results in reduced heat dissipation and improved efficiency in power-constrained applications.

Q: Are there compliance or certification differences?

A: The KA7906TU is obsolete with no current RoHS status listed. Both MC7906CTG and MC7906CT-BP are RoHS3 compliant and actively produced, meeting current regulatory requirements for new designs and long-term supply continuity.

Q: Does packaging format affect substitution?

A: All three parts use TO-220-3 through-hole packages with identical pin configurations. Packaging format (tube for MC7906CTG, bulk for MC7906CT-BP) affects procurement and handling but does not impact electrical or mechanical compatibility.

Q: Which substitute should be selected for new designs?

A: MC7906CTG is recommended for new designs due to manufacturer continuity with the original KA7906TU and active production status. MC7906CT-BP is a valid alternative offering superior dropout performance.

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