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1KSMB82A Equivalent & Substitute Parts
Part Overview
The 1KSMB82A is an active-status Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection in surface-mount applications. This unidirectional zener diode operates with a reverse standoff voltage of 70.1V and provides 113V clamping at peak pulse current, delivering 1000W peak pulse power dissipation in a DO-214AA (SMB) package. Equivalent and substitute parts are identified based on matching electrical performance parameters and package compatibility to support procurement flexibility and supply chain continuity.
Substiute Parts
Key Parameters
| Parameter | 1KSMB82A |
|---|---|
| Manufacturer | Littelfuse Inc. |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener |
| Voltage - Reverse Standoff (Typ) | 70.1V |
| Voltage - Breakdown (Min) | 77.9V |
| Voltage - Clamping (Max) @ Ipp | 113V |
| Current - Peak Pulse (10/1000µs) | 8.8A |
| Power - Peak Pulse | 1000W |
| Package / Case | DO-214AA, SMB |
| Mounting Type | Surface Mount |
| Operating Temperature | -55°C ~ 150°C (TJ) |
| RoHS Status | ROHS3 Compliant |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitute parts for the 1KSMB82A are qualified based on the following critical electrical and mechanical parameters:
- Voltage - Reverse Standoff (Typ): 70V to 70.1V
- Voltage - Clamping (Max) @ Ipp: 113V
- Voltage - Breakdown (Min): 77.8V to 77.9V
- Package / Case: DO-214AA or SMB equivalent
- Mounting Type: Surface Mount
- Unidirectional Channels: 1
- Type: Zener
Substitute parts may vary in Current - Peak Pulse (5.3A to 8.8A) and Power - Peak Pulse (600W to 1000W) ratings, provided the voltage parameters and package specifications remain within the specified ranges. Operating temperature ranges may differ within the -50°C to -55°C minimum and 150°C to 175°C maximum bounds.
Parameter Comparison
| Parameter | 1KSMB82A (Littelfuse) | P6SMB82A (Eaton) | SMBJ70A (MDD) | SMBJP6KE82A-TP (Micro Commercial Co) |
|---|---|---|---|---|
| Voltage - Reverse Standoff (Typ) | 70.1V | 70.1V | 70V | 70.1V |
| Voltage - Breakdown (Min) | 77.9V | 77.9V | 77.8V | 77.9V |
| Voltage - Clamping (Max) @ Ipp | 113V | 113V | 113V | 113V |
| Current - Peak Pulse (10/1000µs) | 8.8A | 5.4A | 5.3A | 5.4A |
| Power - Peak Pulse | 1000W | 600W | 600W | 600W |
| Package / Case | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB |
| Operating Temperature | -55°C ~ 150°C (TJ) | -55°C ~ 150°C (TJ) | -50°C ~ 150°C (TJ) | -55°C ~ 175°C (TJ) |
| RoHS Status | ROHS3 Compliant | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Active | Active | Active | Active |
Engineering Selection Recommendations
All listed substitute parts maintain active product status and meet RoHS compliance requirements. The 1KSMB82A, P6SMB82A, and SMBJP6KE82A-TP are ROHS3 compliant, while the SMBJ70A is also ROHS3 compliant. All parts are unidirectional zener TVS diodes in DO-214AA (SMB) surface-mount packages with matching voltage specifications.
Selection between the main part and substitutes should account for current and power dissipation requirements. The 1KSMB82A provides 8.8A peak pulse current and 1000W peak pulse power, while P6SMB82A, SMBJ70A, and SMBJP6KE82A-TP provide 5.3A to 5.4A peak pulse current and 600W peak pulse power. Applications requiring the full 1000W dissipation capability must use the 1KSMB82A. For applications with lower transient energy requirements, the 600W-rated substitutes are electrically compatible.
The SMBJP6KE82A-TP offers an extended operating temperature range to 175°C, compared to 150°C for the primary part and P6SMB82A, and 150°C for the SMBJ70A. The SMBJ70A operates from -50°C minimum, compared to -55°C for the other parts.
Frequently Asked Questions (FAQ)
Q: Can P6SMB82A replace 1KSMB82A in all applications?
A: P6SMB82A is electrically compatible for voltage specifications (70.1V standoff, 113V clamping, 77.9V breakdown). However, P6SMB82A is rated for 5.4A peak pulse current and 600W peak pulse power, compared to 1KSMB82A's 8.8A and 1000W. Use P6SMB82A only in applications where transient energy does not exceed 600W.
Q: What is the difference between SMBJ70A and 1KSMB82A?
A: SMBJ70A matches the voltage specifications (70V standoff, 113V clamping, 77.8V breakdown) and package (DO-214AA, SMB). SMBJ70A is rated for 5.3A peak pulse current and 600W peak pulse power. The minimum operating temperature for SMBJ70A is -50°C, compared to -55°C for 1KSMB82A.
Q: Is SMBJP6KE82A-TP suitable for high-temperature applications?
A: SMBJP6KE82A-TP operates from -55°C to 175°C, providing a 25°C higher maximum temperature rating than 1KSMB82A (-55°C to 150°C). Voltage and package specifications are identical. Peak pulse current is 5.4A and power is 600W.
Q: Are all substitute parts in the same package?
A: Yes. All parts use DO-214AA (SMB) surface-mount packages with identical mechanical and electrical interface specifications.
Q: What compliance certifications apply to these parts?
A: All parts are RoHS compliant. The 1KSMB82A, SMBJ70A, and SMBJP6KE82A-TP are ROHS3 compliant. P6SMB82A is RoHS compliant. All parts carry ECCN EAR99 classification and HTSUS code 8541.10.0080.
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