TZX6V2C-TAP Equivalent & Substitute Parts

Part Overview

The TZX6V2C-TAP is a 6.2 V, 500 mW Zener diode manufactured by Vishay General Semiconductor - Diodes Division in the DO-35 (DO-204AH) through-hole package. This component is classified as an automotive-grade device with AEC-Q101 qualification and operates across the temperature range of -65°C to 175°C. The part is RoHS3 compliant and currently active in production with 661 pieces in stock.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging or compliance requirements are needed, or when design flexibility permits selection from multiple qualified sources meeting the same electrical specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	6.2	V
Power - Maximum	500	mW
Impedance (Maximum)	15	Ohms
Operating Temperature Range	-65 to 175	°C
Package / Case	DO-204AH, DO-35, Axial	—
Mounting Type	Through Hole	—
RoHS Status	RoHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the TZX6V2C-TAP is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nominal): 6.2 V (exact match required)
Power - Maximum: 500 mW (equal or greater)
Package / Case: DO-204AH, DO-35, Axial (physical compatibility)
Mounting Type: Through Hole (assembly compatibility)

Secondary Compatibility Factors:

Operating Temperature Range: -65°C to 175°C minimum (or extended range)
Impedance (Maximum): 15 Ohms or lower (electrical performance)
Tolerance: ±5% or tighter (voltage regulation accuracy)

Substitute parts are grouped into two categories:

Category A - Full Electrical Equivalents (500 mW, 6.2 V): Parts meeting all primary criteria with identical or superior electrical performance characteristics.

Category B - Reduced Power Equivalents (400 mW, 6.2 V): Parts with lower maximum power dissipation that may be suitable for applications with reduced power requirements but do not provide full equivalence to the original specification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (V)	Power Max (mW)	Zzt Max (Ohms)	Tolerance	Temp Range (°C)	RoHS Status	Packaging
TZX6V2C-TAP	Vishay General Semiconductor	6.2	500	15	—	-65 to 175	RoHS3 Compliant	Cut Tape
1N4691	Microchip Technology	6.2	500	—	±5%	-65 to 175	RoHS Non-compliant	Bulk
1N5234B	Microchip Technology	6.2	500	7	±5%	-65 to 175	RoHS Non-compliant	Bulk
1N5234BTR	Fairchild Semiconductor	6.2	500	7	±5%	-65 to 200	Not specified	Bulk
1N5234C	Fairchild Semiconductor	6.2	500	7	±2%	—	Not specified	Bulk
1N753A TR PBFREE	Central Semiconductor Corp	6.2	500	7	±5%	-65 to 200	RoHS3 Compliant	Cut Tape
1N821-1	Microchip Technology	6.2	500	15	±5%	-55 to 175	RoHS Non-compliant	Bulk
1N827A	Solid State Inc.	6.2	400	15	±5%	-55 to 175	RoHS3 Compliant	—
1N829	Microchip Technology	6.2	500	15	±5%	-55 to 175	RoHS Non-compliant	Bulk
1N829A	Solid State Inc.	6.2	400	15	±5%	-55 to 175	RoHS3 Compliant	Box
BZX79C6V2-T50A	Fairchild Semiconductor	6.2	500	10	±5%	-65 to 200	Not applicable	Bulk

Engineering Selection Recommendations

Recommended Primary Substitutes (Full 500 mW Equivalents):

1N753A TR PBFREE (Central Semiconductor Corp) — Preferred for RoHS3-compliant applications. Maintains 500 mW power rating, 6.2 V nominal voltage, and extends operating temperature to 200°C. Available in Cut Tape packaging matching the original part format. 11,006 units in stock.
1N5234BTR (Fairchild Semiconductor) — Suitable for extended temperature applications (-65°C to 200°C). Provides 500 mW power dissipation with lower impedance (7 Ohms) than the original specification. 10,300 units in stock.
BZX79C6V2-T50A (Fairchild Semiconductor) — Offers 500 mW power rating with improved impedance characteristics (10 Ohms). Extended temperature range to 200°C. Highest inventory availability at 60,809 units.

Secondary Substitutes (500 mW Equivalents with Compliance Considerations):

1N5234B (Microchip Technology) — Meets 500 mW and 6.2 V specifications with ±5% tolerance. RoHS non-compliant status requires verification against design requirements. 5,400 units in stock.
1N821-1 (Microchip Technology) — Maintains impedance matching (15 Ohms) to the original part with 500 mW power rating. Temperature range limited to -55°C to 175°C. RoHS non-compliant. 1,163 units in stock.
1N829 (Microchip Technology) — Identical impedance (15 Ohms) and power rating (500 mW) to the original. Temperature range -55°C to 175°C. RoHS non-compliant. 958 units in stock.

Reduced Power Alternatives (400 mW, 6.2 V):

1N827A (Solid State Inc.) — 400 mW power rating with RoHS3 compliance. Suitable only for applications with reduced power dissipation requirements. 1,528 units in stock.
1N829A (Solid State Inc.) — 400 mW power rating with RoHS3 compliance. Suitable only for applications with reduced power dissipation requirements. 1,678 units in stock.

Not Recommended:

1N4691 (Microchip Technology) — RoHS non-compliant with no specified impedance data. Use only when legacy system compatibility is required.
1N5234C (Fairchild Semiconductor) — Operating temperature range not specified in available data. Verify temperature specifications before selection.

Frequently Asked Questions (FAQ)

Q: Can I substitute the TZX6V2C-TAP with a 400 mW Zener diode such as 1N827A or 1N829A?

A: Substitution with 400 mW parts is not recommended for direct replacement. The original specification calls for 500 mW maximum power dissipation. Use 400 mW alternatives only if circuit analysis confirms that the application dissipates less than 400 mW under all operating conditions, including worst-case scenarios.

Q: What is the difference between the TZX6V2C-TAP and 1N753A TR PBFREE in terms of substitution suitability?

A: Both parts share the same 6.2 V nominal voltage and 500 mW power rating in DO-35 packaging. The 1N753A TR PBFREE offers superior compliance (RoHS3 compliant versus RoHS3 compliant for the original), extended temperature range (-65°C to 200°C versus -65°C to 175°C), and is available in Cut Tape packaging matching the original format. The 1N753A TR PBFREE is the preferred substitute for new designs.

Q: Why do some substitute parts have lower impedance values (7 Ohms) compared to the original (15 Ohms)?

A: Lower impedance values indicate superior voltage regulation characteristics and reduced dynamic resistance. Parts such as 1N5234B, 1N5234BTR, and 1N753A TR PBFREE with 7 Ohms impedance provide better performance than the original 15 Ohms specification. These are direct upgrades in terms of electrical performance and are fully compatible substitutes.

Q: Is the TZX6V2C-TAP compatible with RoHS non-compliant substitute parts?

A: The original TZX6V2C-TAP is RoHS3 compliant. Substitution with RoHS non-compliant parts such as 1N4691, 1N5234B, 1N821-1, or 1N829 is permissible only if the end application or regional regulations do not mandate RoHS compliance. Verify compliance requirements before selecting non-compliant alternatives.

Q: Can I use BZX79C6V2-T50A as a direct substitute for the TZX6V2C-TAP?

A: Yes. The BZX79C6V2-T50A meets all primary substitution criteria: 6.2 V nominal voltage, 500 mW power rating, and DO-35 through-hole package. It offers improved impedance (10 Ohms) and extended temperature range (-65°C to 200°C). The primary consideration is packaging format; the BZX79C6V2-T50A is supplied in Bulk packaging rather than Cut Tape.

Q: What is the significance of the ±2% tolerance on the 1N5234C compared to ±5% on other parts?

A: The ±2% tolerance on the 1N5234C provides tighter voltage regulation accuracy compared to ±5% tolerance parts. This means the actual Zener voltage will remain closer to the nominal 6.2 V specification across the operating range. Select the 1N5234C when circuit design requires precise voltage regulation; use ±5% tolerance parts for general-purpose applications with wider voltage tolerance margins.

Q: Are there packaging differences between the TZX6V2C-TAP and its substitutes?

A: Yes. The original TZX6V2C-TAP is supplied in Cut Tape (CT) packaging. Most substitute parts are supplied in Bulk packaging, with the exception of 1N753A TR PBFREE (also Cut Tape) and 1N829A (Box packaging). Verify packaging compatibility with your assembly process before final part selection.

Q: What is the minimum operating temperature range I should accept when substituting the TZX6V2C-TAP?

A: The original part operates from -65°C to 175°C. Acceptable substitutes must support at least this range. Parts with reduced minimum temperature (-55°C) such as 1N821-1, 1N827A, 1N829, and 1N829A are suitable only if your application does not require operation below -55°C. Verify your system's minimum operating temperature before selecting these alternatives.

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