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P6SMBJ350CA Equivalent & Substitute Parts
Part Overview
The P6SMBJ350CA is a transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 300V reverse standoff voltage with a 482V maximum clamping voltage and 1.3A peak pulse current capability in a DO-214AA (SMB) package. The part is currently listed as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Voltage - Reverse Standoff (Typ) | 300V |
| Voltage - Breakdown (Min) | 332V |
| Voltage - Clamping (Max) @ Ipp | 482V |
| Current - Peak Pulse (10/1000µs) | 1.3A |
| Power - Peak Pulse | 600W |
| Package / Case | DO-214AA, SMB |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -55°C ~ 150°C (TJ) |
| Type | Zener |
| Bidirectional Channels | 1 |
Substitute Part Grouping Explanation
Substitution of the P6SMBJ350CA is determined by strict equivalence across the following electrical and mechanical parameters:
- Voltage - Reverse Standoff: 300V (nominal)
- Voltage - Clamping (Max) @ Ipp: 482V ± tolerance
- Current - Peak Pulse (10/1000µs): 1.3A ± tolerance
- Power - Peak Pulse: 600W
- Package / Case: DO-214AA or SMB
- Mounting Type: Surface Mount
- Type: Zener, Bidirectional (1 channel)
The identified substitute parts maintain these core electrical specifications within acceptable engineering tolerances. Variations in clamping voltage (482V to 486V) and peak pulse current (1.3A to 1.23A) remain within the functional operating envelope for this device category.
Parameter Comparison
| Parameter | P6SMBJ350CA (Littelfuse) | P6SMB350CA (Eaton) | SMBJP6KE350CA-TP (Micro Commercial Co) | SMBJ300CA (Meritek) | TV06B301JB-G (Comchip Technology) |
|---|---|---|---|---|---|
| Voltage - Reverse Standoff (Typ) | 300V | 300V | 300V | 300V | 300V |
| Voltage - Breakdown (Min) | 332V | 332V | 332V | 335V | 335V |
| Voltage - Clamping (Max) @ Ipp | 482V | 482V | 482V | 486V | 486V |
| Current - Peak Pulse (10/1000µs) | 1.3A | 1.3A | 1.3A | 1.23A | 1.23A |
| Power - Peak Pulse | 600W | 600W | 600W | 600W | 600W |
| Package / Case | DO-214AA, SMB | DO-214AA, SMB | DO-214AA, SMB | DO-214AA (SMB) | DO-214AA, SMB |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Operating Temperature Range | -55°C ~ 150°C (TJ) | -55°C ~ 150°C (TJ) | -55°C ~ 175°C (TJ) | -55°C ~ 150°C | Not specified |
| Product Status | Obsolete | Active | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitutes (Exact Electrical Match):
P6SMB350CA (Eaton - Electronics Division) and SMBJP6KE350CA-TP (Micro Commercial Co) provide direct electrical equivalence to the P6SMBJ350CA with identical voltage and current specifications. SMBJP6KE350CA-TP offers extended operating temperature range (-55°C ~ 175°C) and ROHS3 compliance. P6SMB350CA is actively produced but carries RoHS non-compliance status.
Secondary Substitutes (Minor Parameter Variance):
SMBJ300CA (Meritek) and TV06B301JB-G (Comchip Technology) maintain functional equivalence with clamping voltage of 486V (4V higher) and peak pulse current of 1.23A (0.07A lower). These variations remain within acceptable operating margins for general-purpose TVS applications. Both parts are ROHS3 compliant and actively produced.
Compliance Considerations:
For applications requiring ROHS3 compliance, SMBJP6KE350CA-TP, SMBJ300CA, and TV06B301JB-G are suitable. P6SMB350CA does not meet ROHS3 requirements. All parts carry identical ECCN and HTSUS classifications.
Frequently Asked Questions (FAQ)
Q: Can P6SMB350CA be used as a direct replacement for P6SMBJ350CA?
A: Yes. P6SMB350CA maintains identical electrical specifications: 300V reverse standoff, 482V clamping voltage, and 1.3A peak pulse current. Both use DO-214AA (SMB) surface-mount packaging. The primary difference is RoHS compliance status and active production availability.
Q: What is the difference between the 482V and 486V clamping voltage variants?
A: SMBJP6KE350CA-TP and P6SMBJ350CA specify 482V maximum clamping, while SMBJ300CA and TV06B301JB-G specify 486V. This 4V difference represents a 0.8% variance and remains within acceptable tolerance for general-purpose overvoltage protection circuits.
Q: Are all substitute parts available in the same package?
A: All identified substitutes use DO-214AA (SMB) surface-mount packaging, ensuring mechanical and footprint compatibility. Tape & Reel (TR) packaging is available for most active production variants.
Q: Does operating temperature range affect substitution suitability?
A: SMBJP6KE350CA-TP supports -55°C ~ 175°C, exceeding the original P6SMBJ350CA specification of -55°C ~ 150°C. Other substitutes match the original temperature range. Temperature capability should be verified against application requirements.
Q: Which substitute offers the best compliance profile?
A: SMBJP6KE350CA-TP combines ROHS3 compliance, active production status, extended temperature range, and exact electrical specifications matching the original part.
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