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1N6284A Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts
Part Overview
The 1N6284A is a unidirectional Zener-type transient voltage suppressor manufactured by onsemi, designed for general-purpose overvoltage protection applications. This component features a 30.8V reverse standoff voltage with 49.9V clamping capability and 1500W peak pulse power rating in an axial through-hole package (DO-201AD). The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | 1N6284A |
| Manufacturer | onsemi |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener |
| Unidirectional Channels | 1 |
| Voltage - Reverse Standoff (Typ) | 30.8V |
| Voltage - Breakdown (Min) | 34.2V |
| Voltage - Clamping (Max) @ Ipp | 49.9V |
| Power - Peak Pulse | 1500W (1.5kW) |
| Operating Temperature Range | -65°C ~ 175°C (TJ) |
| Mounting Type | Through Hole |
| Package / Case | DO-201AD, Axial |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the 1N6284A is determined by the following critical parameters:
- Voltage - Reverse Standoff (Typ): 30.8V
- Voltage - Breakdown (Min): 34.2V
- Voltage - Clamping (Max) @ Ipp: 49.9V
- Power - Peak Pulse: 1500W (1.5kW)
- Type: Zener, Unidirectional
- Mounting Type: Through Hole
- Applications: General Purpose
Substitute parts are grouped into two categories based on package type and peak pulse current capability:
Category 1: High Current Density (1500W, 30+ Amps) - Direct functional equivalents with identical power rating and similar peak pulse current specifications. These parts use DO-201 series packages (DO-201AA, DO-201AE, DO-27) and are suitable for direct replacement in applications requiring maximum transient energy dissipation.
Category 2: Reduced Current Density (400W, 8+ Amps) - Lower power rating alternatives with reduced peak pulse current. These parts use DO-204AL (DO-41) packages and are suitable only for applications with lower transient energy requirements.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) | Voltage - Breakdown (Min) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Operating Temperature | Package / Case | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| 1N6284A | onsemi | 30.8V | 34.2V | 49.9V | - | 1500W | -65°C ~ 175°C | DO-201AD, Axial | Obsolete | RoHS non-compliant |
| 1.5KE36A | Taiwan Semiconductor Corporation | 30.8V | 34.2V | 49.9V | 31A | 1500W | -55°C ~ 175°C | DO-201AA, DO-27, Axial | Active | ROHS3 Compliant |
| 1.5KE36A-B | Littelfuse Inc. | 30.8V | 34.2V | 49.9V | 30.5A | 1500W | -55°C ~ 175°C | DO-201AA, DO-27, Axial | Active | ROHS3 Compliant |
| 1.5KE36A-E3/73 | Vishay General Semiconductor - Diodes Division | 30.8V | 34.2V | 49.9V | 30.1A | 1500W | -55°C ~ 175°C | DO-201AA, DO-27, Axial | Active | ROHS3 Compliant |
| 1.5KE36A-G | Comchip Technology | 30.8V | 34.2V | 49.9V | 30.06A | 1500W | -55°C ~ 150°C | DO-201AA, DO-27, Axial | Active | ROHS3 Compliant |
| 1.5KE36A-HF | Comchip Technology | 30.8V | 34.2V | 49.9V | 30.06A | 1500W | -55°C ~ 150°C | DO-201AA, DO-27, Axial | Active | ROHS3 Compliant |
| 1.5KE36A-TP | Micro Commercial Co | 30.8V | 34.2V | 49.9V | - | 1500W | -55°C ~ 175°C | DO-201AE, Axial | Active | ROHS3 Compliant |
| 1.5KE36AHE3_A/D | Vishay General Semiconductor - Diodes Division | 30.8V | 34.2V | 49.9V | 30.1A | 1500W | -55°C ~ 175°C | DO-201AA, DO-27, Axial | Active | ROHS3 Compliant |
| 1V5KE36A | Taiwan Semiconductor Corporation | 30.8V | 34.2V | 49.9V | 30.1A | 1500W | -55°C ~ 175°C | DO-201AD, Axial | Active | ROHS3 Compliant |
| P4KE36A | Taiwan Semiconductor Corporation | 30.8V | 34.2V | 49.9V | 8.4A | 400W | -55°C ~ 175°C | DO-204AL, DO-41, Axial | Active | ROHS3 Compliant |
| P4KE36A-AP | Micro Commercial Co | 30.8V | 34.2V | 49.9V | 8.2A | 400W | -55°C ~ 175°C | DO-204AL, DO-41, Axial | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitutes (Full Functional Equivalence):
The 1.5KE36A series parts from Taiwan Semiconductor Corporation, Littelfuse Inc., Vishay General Semiconductor, and Comchip Technology provide direct functional equivalence to the 1N6284A. All maintain identical voltage specifications (30.8V standoff, 34.2V breakdown, 49.9V clamping) and 1500W peak pulse power rating. These parts are all active products with ROHS3 compliance, addressing the RoHS non-compliance status of the obsolete 1N6284A.
The 1.5KE36AHE3_A/D variant from Vishay includes AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade reliability. The 1V5KE36A from Taiwan Semiconductor Corporation uses the DO-201AD package, matching the original 1N6284A package footprint exactly.
Secondary Substitutes (Reduced Power Rating):
The P4KE36A series parts (Taiwan Semiconductor Corporation and Micro Commercial Co) maintain identical voltage specifications but operate at 400W peak pulse power with reduced peak pulse current (8.2-8.4A). These are suitable only for applications where transient energy requirements do not exceed 400W. The DO-204AL (DO-41) package differs from the original axial package and requires PCB layout modification.
Temperature Considerations:
The 1N6284A operates across -65°C to 175°C. Most active substitutes operate from -55°C to 175°C, representing a 10°C reduction in minimum operating temperature. The 1.5KE36A-G and 1.5KE36A-HF variants are limited to -55°C to 150°C maximum, reducing the upper temperature margin by 25°C. Applications requiring the full -65°C minimum temperature should specify 1.5KE36A, 1.5KE36A-B, 1.5KE36A-TP, 1.5KE36AHE3_A/D, 1V5KE36A, or P4KE36A series parts.
Frequently Asked Questions (FAQ)
Q: Can I use a P4KE36A as a direct replacement for the 1N6284A?
A: The P4KE36A maintains identical voltage specifications but operates at 400W peak pulse power versus the 1N6284A's 1500W rating. Substitution is valid only if your application's transient energy requirements do not exceed 400W. The package also differs (DO-204AL versus DO-201AD), requiring PCB layout changes. For applications requiring full 1500W capability, use the 1.5KE36A series instead.
Q: What is the difference between 1.5KE36A and 1.5KE36A-B?
A: Both parts maintain identical electrical specifications (30.8V standoff, 49.9V clamping, 1500W power rating). The primary difference is manufacturer: 1.5KE36A is from Taiwan Semiconductor Corporation, while 1.5KE36A-B is from Littelfuse Inc. Peak pulse current is slightly different (31A versus 30.5A), but both are within the same functional class. Selection may depend on supply chain availability or preferred supplier qualification.
Q: Does the 1.5KE36AHE3_A/D have any advantages over standard 1.5KE36A?
A: The 1.5KE36AHE3_A/D includes AEC-Q101 automotive qualification and extends the operating temperature range to -55°C to 175°C (matching the 1N6284A's upper limit). Standard 1.5KE36A variants are limited to -55°C to 150°C. Select the automotive-qualified variant only if your application requires automotive-grade reliability or the extended upper temperature rating.
Q: Why do some substitute parts show "-" for peak pulse current?
A: The 1.5KE36A-TP and original 1N6284A do not specify peak pulse current in the provided data. However, both maintain the same 1500W power rating and voltage specifications as other 1.5KE36A variants, indicating equivalent current handling capability. For precise current specifications, consult the manufacturer's detailed datasheet.
Q: Can I use 1V5KE36A if my PCB is designed for DO-201AD package?
A: Yes. The 1V5KE36A uses the DO-201AD package, matching the 1N6284A footprint exactly. This part is from Taiwan Semiconductor Corporation, is ROHS3 compliant, and maintains all required voltage and power specifications. It is a suitable direct replacement for PCB designs requiring package compatibility.
Q: What is the minimum operating temperature difference between the 1N6284A and active substitutes?
A: The 1N6284A operates from -65°C minimum. Most active substitutes (1.5KE36A, 1.5KE36A-B, 1.5KE36A-TP, 1V5KE36A, P4KE36A series) operate from -55°C minimum, a 10°C reduction. The 1.5KE36A-G and 1.5KE36A-HF are further limited to -55°C to 150°C. Applications requiring -65°C operation should confirm substitute part datasheets or select alternatives with extended low-temperature ratings.
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