SI2302CDS-T1-E3
Similar · Fit score 20
MOSFET N-CH 20V 2.6A SOT-23
Package: SOT-23 | Series: TrenchFET®
Part Status: Active; REACH Status: REACH Unaffected; ECCN: EAR99; Lead Free: Lead Free
Open Hardware Cross Reference
BSS138L
Current live pairing overstates compatibility. SI2302CDS-T1-E3 is a 20 V trench MOSFET and should not be presented as a normal functional replacement for the 50 V BSS138L shortlist.
Target product summary
BSS138L
BSS138L is onsemi's SOT-23-3 N-channel logic-level enhancement mode MOSFET rated 50 V VDS, 200 mA ID, 3.5 Ω Rds(on) at Vgs = 4.5 V, 350 mW Pd. onsemi product page (2025) shows lifecycle status 'Last Shipments' — the onsemi lifecycle glossary defines 'Last Shipments' as a 6-month period of final shipments, after which the part becomes Obsolete. DigiKey lists Part Status as 'Obsolete' for BSS138L. Direct P2P drop-in: Diodes Incorporated BSS138-7-F (SOT-23-3, 50 V, 200 mA, 3.5 Ω Rds(on)) — identical pinout and pin-for-pin spec match.
Series: BSS138 | Datasheet landing page: https://www.trustcompo.com/product/detail/TCE000056780-BSS138L/datasheet
Replacement candidates
2N7002K-7
Functional · Fit score 60
MOSFET N-CH 60V 0.38A SOT23-3
Package: SOT23 | Series: -
JESD-609 Code: e3; Moisture Sensitivity Level (MSL): 1 (Unlimited); RoHS Status: ROHS3 Compliant; REACH SVHC: No SVHC
BSN20-7
P2P · Fit score 80
MOSFET N-CH 50V 500MA SOT23
Package: SOT23 | Series: -
JESD-609 Code: e3; Moisture Sensitivity Level (MSL): 1 (Unlimited); RoHS Status: ROHS3 Compliant; REACH SVHC: No SVHC
BSS138N
P2P · Fit score 100
N-channel logic-level enhancement mode MOSFET, 60 V, 0.23 A, SOT-23-3. Pin-to-pin drop-in replacement for onsemi BSS138L.
Package: SOT-23-3 | Series: BSS138
Mounting Type: Surface Mount; Manufacturer: Infineon Technologies; Pin Count: 3; Lifecycle Status: Active
BSS138-7-F
P2P · Fit score 100
MOSFET N-CH 50V 200MA SOT23-3
Package: SOT23 | Series: -
Turn-Off Delay Time: 20 ns; Number of Channels: 1; Number of Elements: 1; Turn On Delay Time: 20 ns
Parameter comparison
| Attribute | BSS138L | SI2302CDS-T1-E3 | 2N7002K-7 | BSN20-7 | BSS138N | BSS138-7-F |
|---|---|---|---|---|---|---|
| RoHS Status | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | - | ROHS3 Compliant |
| HTSUS | 8541.29.0095 | 8541.21.0095 | 8541.21.0095 | 8541.21.0095 | - | 8541.21.0095 |
| Part Number | BSS138L | - | - | - | BSS138N | - |
| VDS (Drain-Source) | 50 V | - | - | - | 60 V | - |
| ID (Continuous Drain) | 200 mA (Ta) | - | - | - | 0.23 A (Ta) | - |
| VGS (Gate-Source) | ±20 V | - | - | - | ±20 V | - |
| Vth (Threshold) | 0.8 V to 1.5 V | - | - | - | 0.7 V to 1.5 V | - |
| Power Dissipation (max) | 350 mW (Ta) | - | - | - | 360 mW (Ta) | - |
| Rds(on) | 3.5 ohm @ Vgs = 4.5 V | - | - | - | 3.5 ohm @ Vgs = 10 V | - |
| ECCN | EAR99 | EAR99 | EAR99 | EAR99 | - | EAR99 |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Manufacturer | ON Semiconductor | Vishay | Diodes Incorporated | Diodes Incorporated | Infineon Technologies | Diodes Incorporated |
| Pin Count | 3 | 3 | 3 | 3 | 3 | 3 |
| FET Type | N-Channel enhancement mode | N-Channel | N-Channel | N-Channel | N-Channel enhancement mode (SIPMOS) | N-Channel |
| Lifecycle Status | Last Shipments (entering Obsolete, per onsemi 2025 product page) | - | - | - | Active | - |
| Operating Temperature | -55 C to +150 C | -55°C~150°C TJ | -55°C~150°C TJ | -55°C~150°C TJ | -55 C to +150 C | -55°C~150°C TJ |
| Package / Case | SOT-23-3 (L suffix) | TO-236-3, SC-59, SOT-23-3 | TO-236-3, SC-59, SOT-23-3 | TO-236-3, SC-59, SOT-23-3 | PG-SOT-23 (H6327 / H6433 suffix) | TO-236-3, SC-59, SOT-23-3 |
| Part Status | - | Active | Active | Active | - | Active |
Engineer review boundary
This page is designed for first-pass shortlist work. Treat the candidates below as engineering starting points, then verify footprint compatibility, electrical limits, lifecycle timing, compliance requirements, and qualification scope before approving a BOM change. For official sample requests, full data verification, and legal warranty support, please consult through TrustCompo Inquiry Channel.
Evidence summary
- BSS138L datasheet (catalog-datasheet)
Primary manufacturer or catalog datasheet for the target part used as a first-pass reference point. Signals: datasheet, target-part. - BSS138L lifecycle note (catalog-lifecycle)
TrustCompo catalog currently marks the target part lifecycle as at-risk. Reconfirm against current manufacturer notices before release. Signals: at-risk. - SI2302CDS-T1-E3 datasheet (alternative-datasheet)
Current live pairing overstates compatibility. SI2302CDS-T1-E3 is a 20 V trench MOSFET and should not be presented as a normal functional replacement for the 50 V BSS138L shortlist. Signals: similar. - 2N7002K-7 datasheet (alternative-datasheet)
Functional alternative to the obsolete onsemi BSS138L. 2N7002K-7 (Nexperia / Diodes Incorporated) is a 60 V N-channel logic-level enhancement mode MOSFET in SOT-23-3 with the same pinout (1=Gate, 2=Drain, 3=Source). 0.115 A ID and ~3 Ω RDS(on) at Vgs = 10 V. Same logic-level gate Signals: functional. - BSN20-7 datasheet (alternative-datasheet)
Pin-to-pin P2P drop-in for the obsolete onsemi BSS138L. Nexperia BSN20 (Diodes Incorporated 7-inch reel variant) is a 50 V N-channel enhancement mode MOSFET in SOT-23-3 with identical pinout to BSS138L. Logic-level gate drive (RDS(on) ~1.8 Ω at Vgs = 10 V), 0.18 A ID, 360 mW Pd. Signals: p2p.
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Verification notes
Cross-reference pages are useful starting points, not automatic design approvals. Always re-check footprint, electrical limits, lifecycle timing, qualification documents, firmware implications, and supply-chain constraints before releasing a BOM change. For official sample requests, full data verification, and legal warranty support, please consult through TrustCompo Inquiry Channel.