TZX14C-TR Equivalent & Substitute Parts

Part Overview

The TZX14C-TR is a 14 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 an active product with automotive-grade qualification (AEC-Q101) and is ROHS3 compliant. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage circuits. Equivalent and substitute parts are identified when component availability changes, supply chain constraints occur, or design flexibility is required while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	14	V
Power - Maximum	500	mW
Impedance (Maximum)	35	Ohms
Current - Reverse Leakage @ Vr	1	µA @ 11 V
Voltage - Forward (Maximum) @ If	1.5	V @ 200 mA
Operating Temperature Range	-65 to 175	°C
Mounting Type	Through Hole	-
Package / Case	DO-204AH, DO-35, Axial	-
Grade	Automotive	-
Qualification	AEC-Q101	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the TZX14C-TR is determined by strict equivalence in the following electrical and mechanical parameters:

Critical Matching Parameters:

Zener voltage: 14 V nominal
Maximum power dissipation: 500 mW
Package type: DO-35 (DO-204AH) axial through-hole
Mounting type: Through hole

Allowable Variation Parameters:

Zener voltage tolerance: The main part specifies no tolerance value; substitute parts with ±2% to ±5% tolerance are acceptable as they maintain the 14 V nominal specification
Impedance (Zzt): Substitute parts with impedance values of 15 Ohms or 35 Ohms are functionally equivalent; lower impedance indicates improved performance characteristics
Reverse leakage current: Substitute parts with lower leakage (50 nA to 100 nA) represent improved specifications compared to the main part (1 µA)
Forward voltage: Substitute parts with forward voltage values between 1.1 V and 1.5 V @ 200 mA are compatible
Operating temperature: Substitute parts rated to 200°C exceed the main part specification of 175°C and are acceptable

Compliance Requirements: All substitute parts maintain ROHS3 compliance and active product status. Automotive-grade qualification and AEC-Q101 certification are specific to the main part; substitute parts from different manufacturers may not carry identical certifications but are electrically and mechanically interchangeable.

Parameter Comparison

Parameter	TZX14C-TR (Main)	1N5244B	1N5244B TR PBFREE	1N5244BTR	NZX14C,133
Manufacturer	Vishay General Semiconductor	Taiwan Semiconductor Corporation	Central Semiconductor Corp	Fairchild Semiconductor	NXP Semiconductors
Voltage - Zener (Nom)	14 V	14 V	14 V	14 V	14 V
Tolerance	-	±5%	±5%	±5%	±2%
Power - Max	500 mW	500 mW	500 mW	500 mW	500 mW
Impedance (Max)	35 Ohms	15 Ohms	15 Ohms	15 Ohms	35 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 11 V	100 nA @ 10 V	100 nA @ 10 V	100 nA @ 10 V	50 nA @ 9.8 V
Voltage - Forward (Max) @ If	1.5 V @ 200 mA	1.1 V @ 200 mA	1.1 V @ 200 mA	1.2 V @ 200 mA	1.5 V @ 200 mA
Operating Temperature	-65°C ~ 175°C	200°C (TJ)	-65°C ~ 200°C	-65°C ~ 200°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	DO-204AH, DO-35, Axial
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	Not specified
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All four substitute parts (1N5244B, 1N5244B TR PBFREE, 1N5244BTR, and NZX14C,133) are electrically and mechanically compatible with the TZX14C-TR based on matching nominal zener voltage, maximum power rating, and DO-35 through-hole package specification.

1N5244B (Taiwan Semiconductor Corporation): Active product status with ROHS3 compliance. Offers improved impedance (15 Ohms vs. 35 Ohms) and lower reverse leakage current (100 nA vs. 1 µA). Operating temperature specification of 200°C (TJ) exceeds the main part requirement. Zener voltage tolerance of ±5% is acceptable for 14 V nominal applications.

1N5244B TR PBFREE (Central Semiconductor Corp): Active product status with ROHS3 compliance and specified moisture sensitivity level (MSL 1 - Unlimited). Provides identical electrical performance to the 1N5244B variant with extended operating temperature range (-65°C to 200°C). Lead-free designation indicates compliance with environmental restrictions.

1N5244BTR (Fairchild Semiconductor): Active product status. Electrical specifications match the 1N5244B series with 15 Ohms impedance and 100 nA reverse leakage. Forward voltage specification of 1.2 V @ 200 mA falls within acceptable range. Operating temperature range of -65°C to 200°C accommodates the main part requirement.

NZX14C,133 (NXP Semiconductors): Active product status with improved zener voltage tolerance (±2% vs. ±5% for other substitutes). Impedance and forward voltage specifications match the main part (35 Ohms, 1.5 V @ 200 mA). Reverse leakage current of 50 nA represents superior performance. Moisture sensitivity level (MSL 1 - Unlimited) specified. Operating temperature maximum of 175°C matches the main part specification.

Selection among these substitutes depends on application requirements for impedance characteristics, leakage current performance, and temperature operating range. All parts maintain active product status and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the 1N5244B series parts directly replace the TZX14C-TR in existing designs?

A: Yes. The 1N5244B, 1N5244B TR PBFREE, and 1N5244BTR are direct mechanical and electrical substitutes. All share the same 14 V nominal zener voltage, 500 mW power rating, and DO-35 axial through-hole package. Electrical performance is equivalent or superior due to lower impedance and reverse leakage specifications.

Q: What is the difference between the 1N5244B variants (standard, TR PBFREE, and BTR)?

A: The 1N5244B is the base part number from Taiwan Semiconductor Corporation. The 1N5244B TR PBFREE variant from Central Semiconductor Corp adds lead-free (PBFREE) designation and specifies moisture sensitivity level. The 1N5244BTR from Fairchild Semiconductor is supplied in bulk packaging. All three share identical electrical specifications (14 V, 500 mW, ±5% tolerance, 15 Ohms impedance).

Q: How does the NZX14C,133 differ from the 1N5244B series?

A: The NZX14C,133 from NXP Semiconductors offers tighter zener voltage tolerance (±2% vs. ±5%) and lower reverse leakage current (50 nA vs. 100 nA). Impedance and forward voltage match the main part TZX14C-TR (35 Ohms, 1.5 V @ 200 mA). The NZX14C,133 is suitable for applications requiring superior voltage regulation accuracy.

Q: Are there packaging differences among the substitute parts?

A: All substitute parts use the DO-35 (DO-204AH) axial through-hole package, ensuring mechanical compatibility. Packaging format variations (Tape & Reel, Cut Tape, Bulk) affect supply and handling but do not impact electrical or mechanical performance in the circuit.

Q: Does the TZX14C-TR automotive qualification (AEC-Q101) apply to the substitute parts?

A: The TZX14C-TR carries automotive-grade qualification and AEC-Q101 certification specific to Vishay's product line. Substitute parts from other manufacturers (Taiwan Semiconductor, Central Semiconductor, Fairchild, NXP) are not explicitly certified with identical automotive qualifications. However, all substitute parts are active products with ROHS3 compliance and are electrically and mechanically interchangeable. Applications requiring specific automotive certification should verify manufacturer documentation.

Q: What is the significance of impedance differences (15 Ohms vs. 35 Ohms)?

A: Impedance (Zzt) affects the zener diode's dynamic resistance and voltage regulation characteristics. Lower impedance (15 Ohms in the 1N5244B series) provides better voltage stability and faster transient response compared to higher impedance (35 Ohms in the TZX14C-TR and NZX14C,133). Selection depends on circuit requirements for regulation quality and transient performance.

Q: Can the TZX14C-TR be used in applications requiring extended temperature operation?

A: The TZX14C-TR is rated for -65°C to 175°C. The 1N5244B, 1N5244B TR PBFREE, and 1N5244BTR extend the upper temperature limit to 200°C, making them suitable for high-temperature applications. The NZX14C,133 matches the main part at 175°C maximum. Selection should align with specific application temperature requirements.

Q: What reverse leakage current specification should be used for circuit design?

A: The TZX14C-TR specifies 1 µA @ 11 V reverse leakage. Substitute parts offer lower leakage: 1N5244B series at 100 nA @ 10 V and NZX14C,133 at 50 nA @ 9.8 V. Lower leakage current reduces standby power consumption and improves circuit performance. Circuit designs based on the main part specification will operate within acceptable margins with lower-leakage substitutes.

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