TZX11D-TAP Equivalent & Substitute Parts

Part Overview

The TZX11D-TAP is an 11 V, 500 mW Zener diode manufactured by Vishay General Semiconductor - Diodes Division in DO-35 (DO-204AH) axial through-hole packaging. This component is classified as Active product status and carries AEC-Q101 automotive qualification with ROHS3 compliance. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory certifications align with the original component's functional requirements in circuit applications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	11	V
Power - Max	500	mW
Package / Case	DO-204AH, DO-35, Axial	—
Mounting Type	Through Hole	—
Operating Temperature Range	-65°C ~ 175°C	—
RoHS Status	ROHS3 Compliant	—
Grade	Automotive	—

Substitute Part Grouping Explanation

Substitute parts for the TZX11D-TAP are qualified based on the following criteria:

Electrical Equivalence:

Zener voltage: 11 V nominal
Power dissipation: 500 mW maximum
Package configuration: DO-35 (DO-204AH) axial through-hole

Mechanical Compatibility:

Identical package footprint and lead configuration
Through-hole mounting compatibility

Regulatory & Compliance Alignment:

ROHS3 compliance status
REACH unaffected classification
Automotive-grade qualification where applicable

All substitute parts listed maintain these core parameters within the allowed electrical and mechanical specifications for direct circuit substitution.

Parameter Comparison

Parameter	TZX11D-TAP (Vishay)	1N5241B (Microchip)	1N5241BTR (Fairchild)	BZX79C11 (Taiwan Semiconductor)
Voltage - Zener (Nom)	11 V	11 V	11 V	11 V
Tolerance	—	±5%	±5%	±5%
Power - Max	500 mW	500 mW	500 mW	500 mW
Impedance (Max)	25 Ohms	22 Ohms	22 Ohms	20 Ohms
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.5 V @ 200 mA	1.2 V @ 200 mA	1.5 V @ 100 mA
Operating Temperature	-65°C ~ 175°C	-65°C ~ 175°C	-65°C ~ 200°C	-65°C ~ 175°C
Package / Case	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	—	—	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	—	REACH Unaffected

Engineering Selection Recommendations

1N5241B (Microchip Technology)

Active product status with 16,225 units in stock
Maintains 11 V nominal zener voltage and 500 mW power rating
Operating temperature range -65°C to 175°C matches original specification
REACH unaffected classification confirmed
Suitable for general-purpose applications requiring 11 V zener regulation

1N5241BTR (Fairchild Semiconductor)

Active product status with highest inventory availability (344,423 units)
Extends operating temperature range to -65°C to 200°C, providing broader thermal margin
Forward voltage specification of 1.2 V @ 200 mA represents improved performance characteristic
Bulk packaging configuration available
Suitable for applications requiring extended temperature operation

BZX79C11 (Taiwan Semiconductor Corporation)

Active product status with 6,130 units in stock
Lowest impedance specification at 20 Ohms maximum, providing superior voltage regulation stability
Lowest reverse leakage current at 100 nA @ 8 V, indicating reduced standby current draw
ROHS3 compliant and REACH unaffected
Tape & Reel packaging configuration available
Suitable for precision voltage reference and low-leakage applications

All substitute parts maintain automotive-grade electrical performance within the 11 V / 500 mW classification and are mechanically compatible with DO-35 through-hole circuit board layouts.

Frequently Asked Questions (FAQ)

Q: Can 1N5241B, 1N5241BTR, and BZX79C11 be used interchangeably with TZX11D-TAP?

A: Yes. All substitute parts share identical nominal zener voltage (11 V), maximum power dissipation (500 mW), and DO-35 axial through-hole package configuration. Electrical performance differences are within acceptable tolerance ranges for standard zener diode applications.

Q: What is the significance of impedance differences between substitute parts?

A: Impedance (Zzt) affects voltage regulation stability under load changes. The TZX11D-TAP specifies 25 Ohms maximum, while substitutes range from 20 to 22 Ohms. Lower impedance values (BZX79C11 at 20 Ohms) provide superior transient response and tighter voltage regulation. Higher impedance values remain acceptable for applications with stable load conditions.

Q: Are there temperature range differences that affect substitution?

A: The 1N5241BTR extends the upper operating temperature to 200°C, compared to 175°C for the original TZX11D-TAP and other substitutes. This extended range is beneficial for high-temperature environments but not required for standard applications operating within -65°C to 175°C.

Q: What packaging options are available for substitute parts?

A: The 1N5241B is supplied in standard packaging (not specified). The 1N5241BTR is available in Bulk packaging. The BZX79C11 is supplied in Tape & Reel (TR) configuration. All maintain identical DO-35 component geometry for circuit board compatibility.

Q: How do reverse leakage current specifications compare?

A: The TZX11D-TAP specifies 1 µA @ 8.2 V. The 1N5241B and 1N5241BTR specify 2 µA @ 8.4 V. The BZX79C11 specifies 100 nA @ 8 V, representing significantly lower leakage. Lower leakage current reduces standby power consumption in battery-powered or precision reference applications.

Q: Are all substitute parts compliant with automotive and environmental regulations?

A: The TZX11D-TAP and BZX79C11 carry ROHS3 compliance certification. All parts are REACH unaffected. The TZX11D-TAP carries AEC-Q101 automotive qualification. Regulatory compliance status for 1N5241B and 1N5241BTR regarding automotive qualification is not specified in available data.

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