Equivalent & Substitute Parts for STZ6.8TFHT146 Zener Diode Array

Part Overview

The STZ6.8TFHT146 is a Zener Diode Array produced by Rohm Semiconductor, categorized under Diodes, Zener. It features a 1 Pair Common Anode configuration, nominal Zener voltage of 6.8 V, maximum power rating of 200 mW, and comes packaged in TO-236-3, SC-59, SOT-23-3 (SMD3). It is an active product intended for terminal protection applications. When designing or maintaining systems, it is necessary to find alternative models if product status changes, inventory is insufficient, or specific certifications are required.

Key Parameters

Parameter	STZ6.8TFHT146
Configuration	1 Pair Common Anode
Voltage - Zener (Nom) (Vz)	6.8 V
Tolerance	±4.93%
Power - Max	200 mW
Impedance (Max) (Zzt)	40 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 3.5 V
Operating Temperature	150°C (TJ)
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Supplier Device Package	SMD3
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitutes for Zener Diode Arrays such as STZ6.8TFHT146 are grouped strictly based on the following key parameters: configuration, nominal Zener voltage, tolerance, maximum power rating, impedance, reverse leakage current, operating temperature, mounting type, and package. All listed substitute parts must precisely match these values in order to qualify as direct replacements.

Parameter Comparison

Parameter	STZ6.8TFHT146 (Main Part)	STZ6.8NFHT146 (Substitute)
Manufacturer	Rohm Semiconductor	Rohm Semiconductor
Category	Diodes, Zener	Diodes, Zener
Configuration	1 Pair Common Anode	1 Pair Common Anode
Voltage - Zener (Nom) (Vz)	6.8 V	6.8 V
Tolerance	±4.93%	±4.92%
Power - Max	200 mW	200 mW
Impedance (Max) (Zzt)	40 Ohms	40 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 3.5 V	500 nA @ 3.5 V
Operating Temperature	150°C (TJ)	150°C (TJ)
Mounting Type	Surface Mount	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Supplier Device Package	SMD3	SMD3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Engineering selection between STZ6.8TFHT146 and its substitute STZ6.8NFHT146 can be based on their product status and compliance features. STZ6.8TFHT146 is an active part, while STZ6.8NFHT146 is designated "Not For New Designs." Both parts are ROHS3 compliant, have unlimited moisture sensitivity levels (MSL 1), and are listed as REACH unaffected. For designs requiring active status components or those needing qualification for new designs, STZ6.8TFHT146 is suitable. For ongoing maintenance or replacement in existing designs, STZ6.8NFHT146 may be considered if product status allows.

Frequently Asked Questions (FAQ)

Q1: What are the critical substitution criteria for Zener Diode Arrays in this category?
A1: Critical criteria include matching configuration, Zener voltage, tolerance, maximum power rating, impedance, reverse leakage current, operating temperature, mounting type, and package.

Q2: Is the package and footprint identical between STZ6.8TFHT146 and STZ6.8NFHT146?
A2: Both parts share the same package/case types: TO-236-3, SC-59, SOT-23-3, and supplier device package SMD3, allowing for direct package interchangeability.

Q3: Do both parts meet the same compliance and reliability standards?
A3: Both components are ROHS3 compliant, have a moisture sensitivity level of 1 (unlimited), and are REACH unaffected.

Q4: Is product status a consideration when selecting a substitute?
A4: Yes. STZ6.8TFHT146 is active; STZ6.8NFHT146 is not for new designs. Selection should align with design lifecycle requirements and inventory needs.

Q5: Can STZ6.8NFHT146 be used in automotive applications?
A5: STZ6.8NFHT146 has an automotive grade and AEC-Q101 qualification, as specified in the input parameters.

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