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P6SMB51CA-M3/5B Equivalent & Substitute Parts
Part Overview
The P6SMB51CA-M3/5B is a bidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and provides transient overvoltage protection for general-purpose applications. The part is active and widely available, with 718 units in current inventory. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and application-specific performance requirements.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 43.6 | V |
| Voltage - Breakdown (Min) | 48.5 | V |
| Voltage - Clamping (Max) @ Ipp | 70.1 | V |
| Current - Peak Pulse (10/1000µs) | 8.6 | A |
| Power - Peak Pulse | 600 | W |
| Operating Temperature Range | -65°C to 150°C | TJ |
| Mounting Type | Surface Mount | — |
| Package / Case | DO-214AA, SMB | — |
| Type | Zener | — |
| Bidirectional Channels | 1 | — |
Substitute Part Grouping Explanation
Substitution eligibility for the P6SMB51CA-M3/5B is determined by the following critical parameters:
- Voltage - Reverse Standoff (Typ): 43.6V
- Voltage - Breakdown (Min): 48.5V
- Voltage - Clamping (Max) @ Ipp: 70.1V
- Current - Peak Pulse (10/1000µs): 8.6A minimum
- Power - Peak Pulse: 600W minimum
- Package / Case: DO-214AA, SMB
- Mounting Type: Surface Mount
- Type: Zener, Bidirectional
Substitute parts must maintain identical voltage specifications and equivalent or superior current and power ratings. Package compatibility and surface mount configuration are mandatory. Parts are grouped by manufacturer and packaging variant (Tape & Box vs. Tape & Reel).
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (V) | Voltage - Breakdown (V) | Voltage - Clamping (V) | Current - Peak Pulse (A) | Power - Peak Pulse (W) | Operating Temperature (°C) | Packaging | Inventory (Pcs) |
|---|---|---|---|---|---|---|---|---|---|
| P6SMB51CA-M3/5B | Vishay | 43.6 | 48.5 | 70.1 | 8.6 | 600 | -65 to 150 | Tape & Box | 718 |
| P6SMB51CA-E3/52 | Vishay | 43.6 | 48.5 | 70.1 | 8.6 | 600 | -65 to 150 | Tape & Reel | 4173 |
| 1KSMB51CA | Taiwan Semiconductor Corporation | 43.6 | 48.5 | 70.1 | 14.3 | 1000 | -55 to 175 | Tape & Reel | 10200 |
| P6SMB51CA | Good-Ark Semiconductor | 43.6 | 48.5 | 70.1 | 8.6 | 600 | -55 to 150 | Tape & Reel | 4942 |
Engineering Selection Recommendations
All substitute parts listed maintain identical voltage specifications (43.6V reverse standoff, 48.5V breakdown, 70.1V clamping) and are qualified for direct substitution in applications requiring the P6SMB51CA-M3/5B performance envelope.
P6SMB51CA-E3/52 (Vishay): Direct equivalent with identical electrical specifications and operating temperature range. Differs only in packaging format (Tape & Reel vs. Tape & Box). Recommended for high-volume procurement due to superior inventory availability (4173 units).
1KSMB51CA (Taiwan Semiconductor Corporation): Exceeds minimum performance requirements with 14.3A peak pulse current (vs. 8.6A) and 1000W peak pulse power (vs. 600W). Extended operating temperature range (-55°C to 175°C) provides additional thermal margin. Suitable for applications requiring enhanced transient suppression capability or elevated temperature operation. Highest inventory availability (10200 units).
P6SMB51CA (Good-Ark Semiconductor): Equivalent electrical performance with identical current and power ratings. Operating temperature range (-55°C to 150°C) provides lower temperature limit of -55°C vs. -65°C on original part. Suitable for standard industrial applications. Strong inventory position (4942 units).
All substitute parts are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and maintain REACH unaffected status.
Frequently Asked Questions (FAQ)
Q: Can P6SMB51CA-E3/52 replace P6SMB51CA-M3/5B directly?
A: Yes. Both parts are manufactured by Vishay with identical electrical specifications. The only difference is packaging format: P6SMB51CA-E3/52 uses Tape & Reel while P6SMB51CA-M3/5B uses Tape & Box. Electrical performance and PCB mounting are equivalent.
Q: What are the advantages of using 1KSMB51CA?
A: The 1KSMB51CA provides higher peak pulse current (14.3A vs. 8.6A) and peak pulse power (1000W vs. 600W), offering enhanced transient suppression margin. Extended operating temperature range (-55°C to 175°C) supports higher ambient temperature applications. Voltage specifications remain identical, ensuring circuit compatibility.
Q: Is the Good-Ark P6SMB51CA suitable for low-temperature applications?
A: The Good-Ark P6SMB51CA operates from -55°C to 150°C, which does not extend to the -65°C minimum of the original Vishay part. For applications requiring -65°C operation, use P6SMB51CA-E3/52 or the original P6SMB51CA-M3/5B.
Q: Are all substitute parts surface mount compatible?
A: Yes. All listed parts use DO-214AA (SMB) surface mount package and are compatible with standard SMB footprints.
Q: Do substitute parts require design re-qualification?
A: Voltage and current specifications are identical across all Vishay and Good-Ark variants. The 1KSMB51CA exceeds performance requirements and requires no re-qualification for applications using the original part. Verify compliance certifications (ROHS3, REACH) match your procurement requirements.
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