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P4KE8.2C-B Equivalent & Substitute Parts
Part Overview
The P4KE8.2C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 7.02V reverse standoff voltage and 12.71V maximum clamping voltage, with a peak pulse current rating of 33.9A in a through-hole DO-204AL (DO-41) package. The part is currently classified as obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | P4KE8.2C-B |
| Manufacturer | Littelfuse Inc. |
| Category | Transient Voltage Suppressors (TVS) |
| Series | P4KE |
| Type | Zener |
| Voltage - Reverse Standoff (Typ) | 7.02V |
| Voltage - Clamping (Max) @ Ipp | 12.71V |
| Current - Peak Pulse (10/1000µs) | 33.9A |
| Power - Peak Pulse | 400W |
| Package / Case | DO-204AL, DO-41, Axial |
| Operating Temperature | -55°C ~ 175°C (TJ) |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitute parts for the P4KE8.2C-B are identified based on strict electrical and mechanical compatibility criteria. The following parameters determine valid substitution:
- Voltage - Reverse Standoff (Typ): 7.02V (must match)
- Bidirectional Channels: 1 (must match)
- Type: Zener (must match)
- Package / Case: DO-204AL, DO-41, Axial (must match)
- Mounting Type: Through Hole (must match)
- Operating Temperature Range: -55°C ~ 175°C (TJ) (must match)
- Series: P4KE (must match)
The substitute parts P4KE8.2CA and P4KE8.2CA-B meet all these criteria. Both maintain the same reverse standoff voltage, package configuration, and thermal operating range. Variations in clamping voltage (12.1V vs. 12.71V) and peak pulse current (34A vs. 33.9A) remain within acceptable tolerance ranges for the P4KE series specification.
Parameter Comparison
| Parameter | P4KE8.2C-B (Main) | P4KE8.2CA | P4KE8.2CA-B |
|---|---|---|---|
| Manufacturer | Littelfuse Inc. | Taiwan Semiconductor Corporation | Littelfuse Inc. |
| Product Status | Obsolete | Active | Active |
| Voltage - Reverse Standoff (Typ) | 7.02V | 7.02V | 7.02V |
| Voltage - Breakdown (Min) | 7.38V | 7.79V | 7.79V |
| Voltage - Clamping (Max) @ Ipp | 12.71V | 12.1V | 12.1V |
| Current - Peak Pulse (10/1000µs) | 33.9A | 34A | 33.9A |
| Power - Peak Pulse | 400W | 400W | 400W |
| Package / Case | DO-204AL, DO-41, Axial | DO-204AL, DO-41, Axial | DO-204AL, DO-41, Axial |
| Operating Temperature | -55°C ~ 175°C (TJ) | -55°C ~ 175°C (TJ) | -55°C ~ 175°C (TJ) |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Packaging | - | Tape & Reel (TR) | Bulk |
Engineering Selection Recommendations
Both P4KE8.2CA and P4KE8.2CA-B are active product alternatives to the obsolete P4KE8.2C-B. Selection between these substitutes depends on procurement and packaging requirements:
P4KE8.2CA-B is manufactured by Littelfuse Inc., the original manufacturer of the P4KE8.2C-B, and is supplied in bulk packaging. This option maintains manufacturer continuity and is suitable for high-volume applications where bulk packaging is acceptable.
P4KE8.2CA is manufactured by Taiwan Semiconductor Corporation and is supplied in Tape & Reel (TR) packaging. This option is suitable for automated assembly processes and applications requiring tape-and-reel format.
Both alternatives are ROHS3 compliant and maintain identical electrical specifications for reverse standoff voltage, operating temperature range, and package configuration. The minor variations in clamping voltage and peak pulse current fall within standard P4KE series tolerances.
Frequently Asked Questions (FAQ)
Q: Can P4KE8.2CA or P4KE8.2CA-B be used as direct replacements for P4KE8.2C-B?
A: Yes. Both parts maintain the same reverse standoff voltage (7.02V), package type (DO-204AL/DO-41), thermal operating range (-55°C to 175°C), and series designation (P4KE). The electrical parameter variations are within acceptable tolerance ranges for this component category.
Q: What is the difference between P4KE8.2CA and P4KE8.2CA-B?
A: The primary differences are manufacturer and packaging format. P4KE8.2CA is supplied by Taiwan Semiconductor Corporation in Tape & Reel format, while P4KE8.2CA-B is supplied by Littelfuse Inc. in bulk packaging. Electrical specifications are equivalent.
Q: Why is the clamping voltage different between the main part and substitutes?
A: P4KE8.2C-B specifies 12.71V maximum clamping voltage, while P4KE8.2CA and P4KE8.2CA-B specify 12.1V. Both values are within the acceptable operating range for 7.02V reverse standoff TVS diodes in the P4KE series and do not affect functional compatibility in general-purpose overvoltage protection applications.
Q: Are there packaging considerations when selecting a substitute?
A: Yes. P4KE8.2CA is supplied in Tape & Reel (TR) format, suitable for automated pick-and-place assembly. P4KE8.2CA-B is supplied in bulk packaging, suitable for manual assembly or high-volume reel applications. Select based on your assembly process requirements.
Q: Do all substitute parts meet RoHS compliance?
A: Yes. P4KE8.2C-B, P4KE8.2CA, and P4KE8.2CA-B are all ROHS3 compliant.
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