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P6SMBJ36A Equivalent & Substitute Parts
Part Overview
The P6SMBJ36A is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse, housed in a DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 30.8V reverse standoff voltage and 49.9V maximum clamping voltage at peak pulse current of 12.2A. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | P6SMBJ36A |
| Manufacturer | Littelfuse |
| Product Status | Obsolete |
| Type | Zener (Unidirectional) |
| Voltage - Reverse Standoff (Typ) | 30.8V |
| Voltage - Breakdown (Min) | 34.2V |
| Voltage - Clamping (Max) @ Ipp | 49.9V |
| Current - Peak Pulse (10/1000µs) | 12.2A |
| Power - Peak Pulse | 600W |
| Package / Case | DO-214AA, SMB |
| Operating Temperature Range | -55°C ~ 150°C (TJ) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the P6SMBJ36A is determined by the following critical electrical and mechanical parameters:
Electrical Compatibility Requirements:
- Voltage - Reverse Standoff (Typ): 30.8V
- Voltage - Breakdown (Min): 34.2V
- Voltage - Clamping (Max) @ Ipp: 49.9V
- Current - Peak Pulse (10/1000µs): 12.2A (±tolerance acceptable)
- Power - Peak Pulse: 600W
- Unidirectional Channels: 1
Mechanical Compatibility Requirements:
- Package / Case: DO-214AA or SMB
- Mounting Type: Surface Mount
- RoHS Compliance: ROHS3 Compliant
Substitute parts are grouped into two categories based on active product status and availability:
Category 1: Direct Electrical & Mechanical Equivalents (Active Status) Parts meeting all electrical parameters and mechanical specifications with current manufacturing status.
Category 2: Functional Equivalents with Parameter Variations Parts meeting core voltage and power specifications but with variations in peak pulse current or clamping voltage characteristics. These parts maintain functional compatibility within the application envelope.
Parameter Comparison
| Part Number | Manufacturer | Status | Voltage - Reverse Standoff (Typ) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Package | Operating Temp Range | RoHS |
|---|---|---|---|---|---|---|---|---|---|
| P6SMBJ36A | Littelfuse | Obsolete | 30.8V | 49.9V | 12.2A | 600W | DO-214AA (SMB) | -55°C ~ 150°C | ROHS3 |
| P6SMB36A | Eaton - Electronics Division | Active | 30.8V | 49.9V | 12.2A | 600W | SMB | -55°C ~ 150°C | RoHS |
| TPSMB36A | Littelfuse | Active | 30.8V | 49.9V | 12.2A | 600W | DO-214AA (SMB) | -65°C ~ 175°C | ROHS3 |
| SZP6SMB36AT3G | Littelfuse Inc. | Active | 30.8V | 49.9V | 12A | 600W | SMB | -65°C ~ 150°C | ROHS3 |
| SMBJP6KE36A-TP | Micro Commercial Co | Active | 30.8V | 49.9V | 12.2A | 600W | DO-214AA (SMB) | -55°C ~ 175°C | ROHS3 |
| SM6T36A | STMicroelectronics | Active | 30.8V | 64.3V | 62A (8/20µs) | 600W | SMB (DO-214AA) | -55°C ~ 150°C | ROHS3 |
| SM6T36A-E3/52 | Vishay General Semiconductor - Diodes Division | Active | 30.8V | 49.9V | 12A | 600W | DO-214AA (SMB) | -65°C ~ 150°C | ROHS3 |
| SM6T36A-E3/5B | Vishay General Semiconductor - Diodes Division | Active | 30.8V | 49.9V | 12A | 600W | DO-214AA (SMB) | -65°C ~ 150°C | ROHS3 |
| SM6T36AY | STMicroelectronics | Active | 30.8V | 64.3V | 62A (8/20µs) | 600W | SMB (DO-214AA) | -55°C ~ 150°C | ROHS3 |
Engineering Selection Recommendations
Primary Recommendation: P6SMB36A (Eaton - Electronics Division)
The P6SMB36A provides direct electrical equivalence with identical voltage and current specifications. As an active product with RoHS compliance, it offers immediate procurement availability. This part is suitable for general-purpose applications and telecom environments.
Secondary Recommendation: TPSMB36A (Littelfuse)
The TPSMB36A maintains full electrical equivalence while offering an extended operating temperature range (-65°C ~ 175°C) and automotive-grade qualification (AEC-Q101). This part is recommended for applications requiring enhanced thermal performance or automotive compliance.
Alternative Recommendation: SMBJP6KE36A-TP (Micro Commercial Co)
The SMBJP6KE36A-TP provides direct electrical equivalence with extended upper operating temperature limit (-55°C ~ 175°C). This part is suitable for general-purpose applications requiring broader temperature operation.
Functional Alternative: SM6T36A-E3/52 or SM6T36A-E3/5B (Vishay General Semiconductor)
These Vishay parts maintain the core voltage specifications (30.8V standoff, 49.9V clamping) with extended lower operating temperature range (-65°C ~ 150°C). Peak pulse current is specified at 12A, which is within acceptable tolerance of the original 12.2A specification. These parts are recommended when Vishay component qualification is required.
Note on SM6T36A and SM6T36AY (STMicroelectronics):
These parts exhibit higher clamping voltage (64.3V) and significantly higher peak pulse current (62A at 8/20µs pulse). While they maintain the same reverse standoff voltage, the elevated clamping voltage may not be suitable for applications with strict voltage regulation requirements. These parts are functional alternatives only for applications where higher clamping voltage is acceptable.
Frequently Asked Questions (FAQ)
Q: Can I use SM6T36A as a direct replacement for P6SMBJ36A?
A: SM6T36A is not a direct replacement. While both parts share the same 30.8V reverse standoff voltage and 600W power rating, the SM6T36A has a maximum clamping voltage of 64.3V compared to 49.9V for the P6SMBJ36A. This higher clamping voltage may exceed the voltage tolerance of protected circuits. Use SM6T36A only if your application can tolerate higher transient voltages.
Q: What is the difference between P6SMB36A and TPSMB36A?
A: Both parts are manufactured by Littelfuse and provide identical electrical specifications. The primary difference is that TPSMB36A has an extended operating temperature range (-65°C ~ 175°C versus -55°C ~ 150°C) and carries automotive-grade qualification (AEC-Q101). Select TPSMB36A for automotive or high-temperature applications.
Q: Are all substitute parts in the same package?
A: Most substitute parts use the SMB (DO-214AA) package, which is mechanically compatible with the original P6SMBJ36A. Verify package designation in your PCB design to ensure proper footprint compatibility. All listed parts are surface mount devices suitable for automated assembly.
Q: Which substitute part has the best availability?
A: SZP6SMB36AT3G (Littelfuse Inc.) shows the highest inventory level at 93,300 pieces. P6SMB36A (Eaton) also has strong availability at 45,400 pieces. Both parts are recommended for procurement planning.
Q: Can I use parts with different peak pulse current ratings?
A: Peak pulse current specifications must be evaluated within your circuit's transient energy profile. Parts rated at 12A (such as SM6T36A-E3/52 and SM6T36A-E3/5B) are acceptable substitutes for the 12.2A original specification. Parts rated at 62A (SM6T36A, SM6T36AY) provide additional margin but may not be necessary for all applications. Consult your circuit design requirements.
Q: Are all substitute parts RoHS compliant?
A: Yes. All listed substitute parts carry ROHS3 compliance, matching the original P6SMBJ36A specification. This ensures compatibility with RoHS-regulated supply chains and end-use markets.
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