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31B SMD Power Diode – Exact Part Number / Manufacturer Confirmation Required Before Listing
31B-marked SMD diode in a 2-terminal surface-mount power package. Suitable for electronic repair and replacement only after confirming the original device specification. Exact manufacturer, part number, voltage and power rating must be verified before purchase.
Stock: 0SKU: SEN-CHINESE-31B-SMDModel: 31B SMD
BDT 16BDT 17
Final pricing may vary by configuration, quantity, delivery and project requirements.
Product overview
31B Marked SMD Power Diode – Identification Required
The pictured component is a 2-terminal surface-mount power diode carrying the top marking 31B. Its physical construction indicates a DO-214-style power-diode package, but the marking 31B alone is not sufficient to determine one unique manufacturer part number.
Published SMD marking databases associate 31B with multiple different semiconductor devices. Depending on the manufacturer and package, examples include Zener diodes with substantially different electrical ratings. Therefore, assigning an exact voltage, power rating or manufacturer from this photograph alone could result in an incorrect product listing.
Confirmed Product Details
| Visible Marking | 31B |
| Component Type | Diode – exact subtype requires confirmation |
| Number of Terminals | 2 |
| Mounting Type | Surface Mount (SMD) |
| Package Family | DO-214-style SMD power package |
| Polarity Mark | Band visible on package |
| Exact Part Number | Not confirmed |
| Manufacturer | Not confirmed |
Why Exact Identification Matters
The code 31B is not globally unique. Different semiconductor manufacturers can reuse the same short SMD marking for unrelated devices or for devices with different voltage and power specifications.
For an accurate replacement, the original circuit information, manufacturer, package dimensions or complete supplier part number should be confirmed before selecting an equivalent.