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P6SMB36CAT3 Equivalent & Substitute Parts
Part Overview
The P6SMB36CAT3 is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for surface mount applications in the DO-214AA (SMB) package. This bidirectional zener diode provides 30.8V reverse standoff voltage with 49.9V clamping capability at 12A peak pulse current and 600W peak pulse power dissipation. The device is qualified to AEC-Q101 automotive standards and operates across -65°C to 150°C junction temperature range.
The P6SMB36CAT3 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications requiring 36V TVS protection in SMB packaging.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 30.8 | V |
| Voltage - Breakdown (Min) | 34.2 | V |
| Voltage - Clamping (Max) @ Ipp | 49.9 | V |
| Current - Peak Pulse (10/1000µs) | 12 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -65 to 150 | °C (TJ) |
| Package / Case | DO-214AA, SMB | |
| Type | Zener | |
| Bidirectional Channels | 1 | |
| Mounting Type | Surface Mount |
Substitute Part Grouping Explanation
Substitution of TVS diodes is determined by electrical parameter compatibility within defined tolerances and mechanical package compatibility. The following criteria establish valid substitution:
Primary Electrical Parameters:
- Voltage - Reverse Standoff (Typ): 30.8V
- Voltage - Breakdown (Min): 34.2V
- Voltage - Clamping (Max) @ Ipp: 49.9V
- Current - Peak Pulse (10/1000µs): minimum 12A
- Power - Peak Pulse: minimum 600W
Mechanical Requirements:
- Package: DO-214AA (SMB) surface mount
- Bidirectional channels: 1
- Mounting type: Surface mount
Compliance Considerations:
- RoHS compliance status
- AEC-Q101 automotive qualification (where applicable)
- Moisture sensitivity level: 1 (Unlimited)
Substitute parts are grouped into two categories:
Category A - Direct Electrical & Mechanical Equivalents (12A @ 49.9V): Parts maintaining identical electrical specifications (30.8V standoff, 49.9V clamp, 12A peak pulse, 600W power) in DO-214AA SMB package with active product status and RoHS3 compliance.
Category B - Enhanced Performance Alternatives (Higher Peak Pulse Current): Parts with identical voltage parameters but higher peak pulse current capability (20A), providing superior transient suppression margin while maintaining 600W or greater power dissipation and DO-214AA SMB package compatibility.
Category C - Voltage Parameter Variants: Parts with similar standoff voltage (30V) and comparable clamping voltage (48.4V-64.3V) in DO-214AA SMB package, suitable for applications with relaxed voltage tolerance requirements.
Parameter Comparison
| Part Number | Manufacturer | Standoff Voltage (V) | Breakdown Voltage (V) | Clamping Voltage (V) | Peak Pulse Current (A) | Peak Pulse Power (W) | Temp Range (°C) | Package | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| P6SMB36CAT3 | onsemi | 30.8 | 34.2 | 49.9 | 12 | 600 | -65 to 150 | DO-214AA (SMB) | Obsolete | Non-compliant |
| 1KSMB36CA | Taiwan Semiconductor Corporation | 30.8 | 34.2 | 49.9 | 20 | 1000 | -55 to 175 | DO-214AA (SMB) | Active | ROHS3 Compliant |
| P6SMB36CA | Good-Ark Semiconductor | 30.8 | 34.2 | 49.9 | 12 | 600 | -55 to 150 | DO-214AA (SMB) | Active | ROHS3 Compliant |
| P6SMB36CA-M3/52 | Vishay General Semiconductor - Diodes Division | 30.8 | 34.2 | 49.9 | 12 | 600 | -65 to 150 | DO-214AA (SMB) | Active | ROHS3 Compliant |
| P6SMB36CA-M3/5B | Vishay General Semiconductor - Diodes Division | 30.8 | 34.2 | 49.9 | 12 | 600 | -65 to 150 | DO-214AA (SMB) | Active | ROHS3 Compliant |
| P6SMB36CAHE3_A/H | Vishay General Semiconductor - Diodes Division | 30.8 | 34.2 | 49.9 | 12 | 600 | -65 to 150 | DO-214AA (SMB) | Obsolete | ROHS3 Compliant |
| SM6T36CA | STMicroelectronics | 30.8 | 34.2 | 64.3 | 62 | 600 | -55 to 150 | DO-214AA (SMB) | Active | ROHS3 Compliant |
| SM6T36CAY | STMicroelectronics | 30.8 | 34.2 | 64.3 | 62 | 600 | -55 to 150 | DO-214AA (SMB) | Active | ROHS3 Compliant |
| SMBJ30CA | MDD | 30 | 33.3 | 48.4 | 12.4 | 600 | -50 to 150 | DO-214AA (SMB) | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Recommendation - Direct Equivalent: P6SMB36CA (Good-Ark Semiconductor) or P6SMB36CA-M3/52 and P6SMB36CA-M3/5B (Vishay) are direct electrical and mechanical equivalents with identical 30.8V standoff, 49.9V clamping, and 12A peak pulse specifications. All three are active products with ROHS3 compliance. Vishay variants maintain the -65°C to 150°C temperature range matching the original P6SMB36CAT3. Good-Ark variant operates -55°C to 150°C. Selection depends on temperature range requirements and supplier availability.
Enhanced Performance Alternative: 1KSMB36CA (Taiwan Semiconductor Corporation) provides identical voltage parameters with 20A peak pulse current and 1000W power dissipation, offering superior transient suppression margin. Extended operating range (-55°C to 175°C) and active product status with ROHS3 compliance support long-term supply continuity. Suitable for applications tolerating higher performance specifications.
Voltage Tolerance Alternative: SMBJ30CA (MDD) operates with 30V standoff and 48.4V clamping voltage, representing 0.8V lower standoff and 1.5V lower clamping compared to the original specification. This part is suitable only for applications with relaxed voltage tolerance requirements. Active product status and ROHS3 compliance are confirmed.
Higher Clamping Voltage Options: SM6T36CA and SM6T36CAY (STMicroelectronics) maintain 30.8V standoff voltage but provide 64.3V clamping with 62A peak pulse current. These parts are suitable for applications requiring enhanced transient energy absorption. SM6T36CAY includes AEC-Q101 automotive qualification. Both are active products with ROHS3 compliance.
Obsolete Status Consideration: P6SMB36CAHE3_A/H (Vishay) is classified as obsolete despite ROHS3 compliance and identical electrical specifications. This part should be avoided for new designs or long-term production commitments.
Frequently Asked Questions (FAQ)
Q: Can P6SMB36CA replace P6SMB36CAT3 directly? A: Yes. P6SMB36CA maintains identical electrical specifications (30.8V standoff, 49.9V clamping, 12A peak pulse, 600W power) and DO-214AA SMB package. Both are bidirectional single-channel zener TVS diodes. P6SMB36CA is active with ROHS3 compliance, addressing the obsolete status of the original part.
Q: What is the difference between P6SMB36CA-M3/52 and P6SMB36CA-M3/5B? A: Both variants are manufactured by Vishay with identical electrical specifications and packaging. The suffix designations (-M3/52 and -M3/5B) indicate different packaging configurations (Tape & Box variants). Electrical performance and DO-214AA SMB package are equivalent. Selection depends on packaging and reel format requirements.
Q: Is 1KSMB36CA a suitable replacement? A: Yes, for applications tolerating higher performance specifications. 1KSMB36CA maintains identical 30.8V standoff and 49.9V clamping voltages but provides 20A peak pulse current versus 12A in the original, with 1000W versus 600W power dissipation. This represents enhanced transient suppression capability. Extended temperature range (-55°C to 175°C) and active product status support supply continuity.
Q: Can SM6T36CA or SM6T36CAY be used as substitutes? A: These parts are suitable only for applications where higher clamping voltage (64.3V versus 49.9V) is acceptable. Standoff voltage remains 30.8V, matching the original. Peak pulse current is significantly higher (62A versus 12A). These parts provide enhanced transient energy absorption and are active products with ROHS3 compliance. SM6T36CAY includes AEC-Q101 automotive qualification.
Q: What packaging formats are available for substitute parts? A: All substitute parts use DO-214AA (SMB) surface mount package, maintaining mechanical compatibility with the original P6SMB36CAT3. Packaging configurations vary by manufacturer and part number suffix (Cut Tape, Digi-Reel, Tape & Box, Tape & Reel formats). Verify specific packaging requirements with supplier documentation.
Q: Are all substitute parts RoHS compliant? A: All active substitute parts listed are ROHS3 compliant. The original P6SMB36CAT3 is RoHS non-compliant. Compliance status is critical for applications subject to RoHS regulations. Obsolete variants (P6SMB36CAHE3_A/H) are ROHS3 compliant but should not be selected for new designs.
Q: What temperature range should I consider for selection? A: The original P6SMB36CAT3 operates -65°C to 150°C. Vishay variants (P6SMB36CA-M3/52, P6SMB36CA-M3/5B, P6SMB36CAHE3_A/H) maintain this range. Good-Ark P6SMB36CA operates -55°C to 150°C. 1KSMB36CA extends to -55°C to 175°C. Select based on application thermal requirements. Automotive-grade applications may require AEC-Q101 qualified parts (SM6T36CAY, P6SMB36CAHE3_A/H).
Q: How do I verify electrical compatibility before substitution? A: Confirm that substitute part specifications meet or exceed the following minimum requirements: Voltage - Reverse Standoff ≥ 30.8V, Voltage - Breakdown (Min) ≥ 34.2V, Voltage - Clamping (Max) ≤ 49.9V (or application-specific tolerance), Current - Peak Pulse ≥ 12A, Power - Peak Pulse ≥ 600W. Verify package compatibility (DO-214AA SMB) and operating temperature range suitability for your application environment.
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