BZX85C12 Equivalent & Substitute Parts

Part Overview

The BZX85C12 is an active-status zener diode manufactured by Taiwan Semiconductor Corporation, rated for 12 V nominal zener voltage with 1.3 W maximum power dissipation. This through-hole component operates across a temperature range of -65°C to 200°C and is packaged in the DO-204AL (DO-41) axial configuration. The device is ROHS3 compliant and REACH unaffected, making it suitable for modern electronic applications requiring voltage regulation and transient protection. Alternative part sourcing becomes necessary due to inventory availability, packaging format requirements, or supply chain considerations while maintaining identical electrical and mechanical specifications.

Substiute Parts

BZX85C12

Taiwan Semiconductor CorporationIn Stock: 1014BZX85C12 Datasheet

Current PartRFQ

BZX85C12 R0G

Taiwan Semiconductor CorporationIn Stock: 5754BZX85C12 R0G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BZX85C12 is determined by strict equivalence across all critical electrical parameters: nominal zener voltage (12 V), power rating (1.3 W maximum), tolerance (±5%), impedance (9 Ohms maximum), reverse leakage current (500 nA @ 9.1 V), forward voltage (1.2 V @ 10 mA), and operating temperature range (-65°C to 200°C). The mechanical configuration must remain identical: through-hole mounting in DO-204AL (DO-41) axial package. Substitute parts must maintain the same manufacturer (Taiwan Semiconductor Corporation), base product series (BZX85), and compliance certifications (ROHS3, REACH unaffected). The only allowable variation is packaging format (Tape & Reel versus Cut Tape), which does not affect electrical performance or circuit functionality.

Parameter Comparison

Engineering Selection Recommendations

The BZX85C12 R0G (Cut Tape) is a direct parametric equivalent to the BZX85C12 (Tape & Reel) for all circuit applications. Both parts are manufactured by Taiwan Semiconductor Corporation, carry active product status, and maintain identical electrical specifications across all rated parameters. Both components satisfy ROHS3 compliance and REACH unaffected requirements, ensuring regulatory compatibility in modern electronic assemblies. The distinction between these parts is limited to packaging format: Tape & Reel packaging is optimized for high-volume automated assembly operations, while Cut Tape packaging accommodates lower-volume or manual assembly workflows. Selection between these variants depends solely on assembly process requirements and inventory management practices, not on electrical performance or circuit functionality.

Frequently Asked Questions (FAQ)

Q: Can BZX85C12 R0G be used as a direct replacement for BZX85C12 in existing designs?

A: Yes. Both parts are parametrically identical across all electrical specifications, operating temperature range, and mechanical configuration. The only difference is packaging format (Cut Tape versus Tape & Reel), which does not affect circuit performance or component functionality.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on continuous carrier tape wound on reels, suitable for automated pick-and-place assembly equipment. Cut Tape (CT) packaging provides the same components on shorter tape segments, typically used for lower-volume assembly or manual placement. Both formats contain identical components with identical electrical properties.

Q: Are there any compliance or certification differences between BZX85C12 and BZX85C12 R0G?

A: No. Both parts carry identical ROHS3 compliance and REACH unaffected status. Both are manufactured by Taiwan Semiconductor Corporation and carry the same ECCN (EAR99) and HTSUS (8541.10.0050) classifications.

Q: What parameters must remain constant for a part to be considered a true substitute for the BZX85C12?

A: True substitutes must maintain identical values for: nominal zener voltage (12 V), power rating (1.3 W), tolerance (±5%), impedance (9 Ohms maximum), reverse leakage current (500 nA @ 9.1 V), forward voltage (1.2 V @ 10 mA), operating temperature range (-65°C to 200°C), and mechanical package (DO-204AL/DO-41 axial through-hole). Packaging format variation (Tape & Reel versus Cut Tape) is the only allowable difference.

Q: Can the BZX85C12 be substituted with zener diodes from other manufacturers?

A: Substitution with parts from other manufacturers requires verification that all electrical parameters, mechanical configuration, and compliance certifications match exactly. The information provided covers only Taiwan Semiconductor Corporation equivalents.

Q: What is the significance of the ±5% tolerance specification?

A: The ±5% tolerance indicates the maximum deviation of the actual zener voltage from the nominal 12 V rating. This means the zener voltage will fall between 11.4 V and 12.6 V under specified test conditions. This tolerance must be maintained in any substitute part to ensure circuit performance remains within design specifications.

Q: Are there inventory considerations when selecting between BZX85C12 and BZX85C12 R0G?

A: Yes. The BZX85C12 (Tape & Reel) has 906 pieces in stock, while the BZX85C12 R0G (Cut Tape) has 5722 pieces in stock. Availability may influence selection based on project timeline and quantity requirements, though both parts are electrically and mechanically identical.