BZX79-B16,133 Equivalent & Substitute Parts

Part Overview

The BZX79-B16,133 is a Zener diode rated at 16 V nominal with 400 mW maximum power dissipation, manufactured by Nexperia USA Inc. This through-hole component operates across a temperature range of -65°C to 200°C and is designed for voltage regulation and protection applications in electronic circuits. The part is currently Active in product status with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when packaging or supplier configurations differ while maintaining identical electrical and mechanical specifications, enabling procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	16	V
Tolerance	±2%	—
Power - Max	400	mW
Impedance (Max)	40	Ohms
Current - Reverse Leakage @ Vr	50	nA @ 11.2 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature Range	-65 to 200	°C
Mounting Type	Through Hole	—
Package / Case	DO-204AH, DO-35, Axial	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the BZX79-B16,133 is determined by electrical and mechanical parameter equivalence. The primary substitution criterion is the maintenance of identical electrical specifications: 16 V nominal Zener voltage, ±2% tolerance, 400 mW maximum power rating, 40 Ohms maximum impedance, 50 nA reverse leakage current at 11.2 V, and 900 mV maximum forward voltage at 10 mA. The operating temperature range of -65°C to 200°C and through-hole mounting configuration must remain constant. The substitute part BZX79-B16,143 meets all these electrical and mechanical requirements. The distinction between the main part and substitute lies in packaging configuration: BZX79-B16,133 is supplied in Cut Tape (CT) format, while BZX79-B16,143 is supplied in Tape & Box (TB) format. Both parts share the same base product number BZX79-B16, supplier device package designation ALF2, and compliance certifications (ROHS3, REACH Unaffected). Substitution is valid when packaging format does not constrain the application requirement.

Parameter Comparison

Parameter	BZX79-B16,133 (Main)	BZX79-B16,143 (Substitute)	Match
Manufacturer	Nexperia USA Inc.	Nexperia USA Inc.	Yes
Category	Diodes, Zener	Diodes, Zener	Yes
Voltage - Zener (Nom)	16 V	16 V	Yes
Tolerance	±2%	±2%	Yes
Power - Max	400 mW	400 mW	Yes
Impedance (Max)	40 Ohms	40 Ohms	Yes
Current - Reverse Leakage @ Vr	50 nA @ 11.2 V	50 nA @ 11.2 V	Yes
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	Yes
Operating Temperature	-65°C ~ 200°C	-65°C ~ 200°C	Yes
Mounting Type	Through Hole	Through Hole	Yes
Package / Case	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial	Yes
Supplier Device Package	ALF2	ALF2	Yes
Product Status	Active	Active	Yes
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Yes
Packaging Format	Cut Tape (CT)	Tape & Box (TB)	Different

Engineering Selection Recommendations

Both BZX79-B16,133 and BZX79-B16,143 are Active products manufactured by Nexperia USA Inc. with identical electrical performance specifications and full ROHS3 compliance. Selection between these parts is determined by packaging and supply requirements rather than electrical or thermal performance. The BZX79-B16,133 in Cut Tape format is suitable for high-volume automated assembly operations where components are fed directly from tape reels. The BZX79-B16,143 in Tape & Box format provides additional packaging protection and is appropriate for applications requiring component storage, manual assembly, or distribution through standard component packaging channels. Both parts maintain the same DO-204AH/DO-35 axial through-hole package configuration and operate identically across the -65°C to 200°C temperature range. Compliance certifications, including ROHS3 and REACH Unaffected status, are equivalent across both part numbers.

Frequently Asked Questions (FAQ)

Q: Can BZX79-B16,143 be used as a direct replacement for BZX79-B16,133?

A: Yes. Both parts are electrically and mechanically identical with 16 V nominal Zener voltage, 400 mW power rating, and identical impedance, leakage, and forward voltage characteristics. The only difference is packaging format: Cut Tape versus Tape & Box.

Q: What is the difference between Cut Tape (CT) and Tape & Box (TB) packaging?

A: Cut Tape packaging supplies components on continuous tape without a protective box, optimized for automated pick-and-place assembly. Tape & Box packaging includes the same tape format but adds a protective cardboard box for storage and distribution. Both formats contain the same component in the same ALF2 supplier package.

Q: Are the electrical specifications identical between BZX79-B16,133 and BZX79-B16,143?

A: Yes. Both parts have identical Zener voltage (16 V), tolerance (±2%), power rating (400 mW), impedance (40 Ohms maximum), reverse leakage current (50 nA @ 11.2 V), forward voltage (900 mV @ 10 mA), and operating temperature range (-65°C to 200°C).

Q: Do both parts have the same compliance certifications?

A: Yes. Both BZX79-B16,133 and BZX79-B16,143 are ROHS3 Compliant and REACH Unaffected with identical moisture sensitivity level (MSL 1 - Unlimited).

Q: Which part should be selected for automated assembly?

A: BZX79-B16,133 in Cut Tape format is optimized for automated assembly operations where components are fed directly from tape reels into pick-and-place equipment.

Q: Which part should be selected for manual assembly or component storage?

A: BZX79-B16,143 in Tape & Box format is suitable for manual assembly and provides additional protection during storage and distribution.

Q: Are both parts currently in production?

A: Yes. Both BZX79-B16,133 and BZX79-B16,143 are Active products with current manufacturing status.

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