1N5989B-TP Equivalent & Substitute Parts

Part Overview

The 1N5989B-TP is a Zener diode rated at 3.6 V nominal with 500 mW power dissipation, manufactured by Micro Commercial Co in a DO-35 through-hole package. This component is classified as obsolete, necessitating identification of active equivalent parts for continued circuit implementation. Substitute parts must maintain identical electrical characteristics and mechanical compatibility to ensure proper circuit function without redesign.

Substiute Parts

1N5989B-TP

Micro Commercial CoIn Stock: 8451N5989B-TP Datasheet

Current PartRFQ

1N5989B-TP

Micro Commercial CoIn Stock: 8451N5989B-TP Datasheet

Parametric EquivalentRFQ

BZX79C3V6-T50A

Fairchild SemiconductorIn Stock: 22141BZX79C3V6-T50A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N5989B-TP is determined by strict equivalence across the following electrical and mechanical parameters:

• Zener Voltage (Vz): 3.6 V nominal with ±5% tolerance
• Power Dissipation: 500 mW maximum
• Impedance (Zzt): 90 Ohms maximum
• Reverse Leakage Current: 15 µA @ 1 V
• Forward Voltage: 1.5 V maximum @ 100 mA
• Operating Temperature Range: -65°C to 200°C
• Package Type: DO-35 through-hole axial configuration
• Regulatory Compliance: ROHS3 compliant

Parts meeting all specified parameters are classified as parametric equivalents and direct substitutes. Deviations in any parameter disqualify a part from substitution without circuit re-evaluation.

Parameter Comparison

Engineering Selection Recommendations

The BZX79C3V6-T50A manufactured by Fairchild Semiconductor is a direct parametric equivalent to the 1N5989B-TP. All electrical specifications, mechanical dimensions, and operating characteristics are identical. The primary distinction is product status: the 1N5989B-TP is obsolete, while the BZX79C3V6-T50A maintains active production status with confirmed inventory availability (22,113 pieces in stock versus 801 pieces for the obsolete part).

For new designs or component replenishment, the BZX79C3V6-T50A is the appropriate selection. Existing circuits using the 1N5989B-TP require no modification for substitution with the BZX79C3V6-T50A, as all functional and physical parameters remain unchanged.

Frequently Asked Questions (FAQ)

Q: Can the BZX79C3V6-T50A replace the 1N5989B-TP in existing circuits?

A: Yes. The BZX79C3V6-T50A is a parametric equivalent with identical electrical specifications (3.6 V zener voltage, 500 mW power rating, 90 Ohms impedance, 15 µA reverse leakage) and mechanical compatibility (DO-35 through-hole package). No circuit modifications are required.

Q: What is the primary reason for substitution?

A: The 1N5989B-TP is classified as obsolete. The BZX79C3V6-T50A is an active product with ongoing manufacturing and availability, ensuring long-term supply chain reliability.

Q: Are there differences in packaging between these parts?

A: Both parts use the DO-35 (DO-204AH) axial through-hole package. Physical dimensions and lead configurations are identical, permitting direct board-level substitution.

Q: Do both parts meet the same regulatory standards?

A: The 1N5989B-TP is confirmed ROHS3 compliant. Regulatory compliance data for the BZX79C3V6-T50A is not provided in the available specifications; however, both parts share identical electrical characteristics and package type, typical of compliant components in this category.

Q: What parameters must remain constant for substitution?

A: Zener voltage (3.6 V), power dissipation (500 mW), impedance (90 Ohms maximum), reverse leakage current (15 µA @ 1 V), forward voltage (1.5 V @ 100 mA), operating temperature range (-65°C to 200°C), and package type (DO-35 through-hole) must all match exactly. Deviations in any parameter require circuit re-evaluation.