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Nexperia USA Inc. BAS21J,115
- Part No.:
- BAS21J,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
BAS21J,115.pdf
- Description:
- DIODE GP 300V 250MA SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:47,176
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Product details
Overview
BAS21J,115 from Nexperia is a single high-speed switching diode in SOD323F (SC-90) package, rated for 300 V repetitive peak reverse voltage, 250 mA forward current, and 50 ns reverse recovery time. It delivers low capacitance (≤2 pF), low leakage (150 nA at 250 V), and thermal resistance of 55 K/W to solder point-used in voltage clamping and reverse polarity protection circuits on space-constrained PCBs.
For engineers reviewing the BAS21J,115 datasheet, BAS21J,115 pinout, BAS21J,115 application, or BAS21J,115 equivalent, key selection criteria include verified trr ≤50 ns under IF/IR = 30 mA switching, Cd ≤2 pF at 1 MHz, VR = 300 V, thermal performance on FR4 with 1 cm² cathode pad, and SOD323F coplanarity compliance for fine-pitch reflow assembly.
Technical Context
This diode operates as a unidirectional high-speed switch with defined anode–cathode polarity and no internal series resistance or integrated protection circuitry. Its junction temperature rating of 150 °C and thermal resistance Rth(j-sp) = 55 K/W are specified for reflow-soldered mounting on FR4 with tin-plated 1 cm² cathode pad.
The device exhibits nonlinear capacitance vs. reverse voltage (0.3–0.4 pF at VR = 25 V; ~2 pF at VR = 0 V) and exponential reverse leakage increase with junction temperature-50 µA at Tj = 150 °C and VR = 250 V-enabling predictable behavior in clamping and transient suppression roles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 300 V - Maximum repetitive reverse voltage before breakdown; defines safe operating range in clamp or flyback circuits. |
| trr | 50 ns - Measured switching transition time from IF = 30 mA to IR = 30 mA; enables >10 MHz switching in signal routing. |
| Cd | 2 pF at VR = 0 V, f = 1 MHz - Low junction capacitance minimizes signal loading in RF detector or sampling applications. |
| IR | 150 nA at VR = 250 V, Tamb = 25 °C - Ultra-low leakage preserves bias integrity in high-impedance sensing nodes. |
| VF | 1.1 V at IF = 100 mA - Forward drop determines conduction loss and self-heating during sustained DC or pulse operation. |
| Rth(j-sp) | 55 K/W - Thermal resistance from junction to cathode solder point; used to calculate ΔTj under pulsed IFSM conditions. |
Pinout & Package
SOD323F (SC-90) is a 2-pin, surface-mount plastic package with 0.65 mm lead pitch, 0.25 mm max lead thickness, and 2.3 × 1.35 mm body dimensions-designed for automated placement and reflow-only soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Marked side of package; connects to lower potential node; carries reverse-biased voltage in clamp configuration. |
| 2 | Anode | Unmarked side; connects to higher potential node; source of forward current path during conduction. |
Key Features
| Feature | Design Value |
|---|---|
| High-speed switching | trr ≤50 ns ensures minimal dead-time distortion in fast-switching power converters and signal demodulators. |
| Low junction capacitance | Cd ≤2 pF at 0 V allows use in 100+ MHz RF envelope detection without significant signal attenuation. |
| Thermal robustness | Rth(j-sp) = 55 K/W supports 1 A IFRM pulses with <10 °C junction rise when mounted per spec on FR4. |
| Reverse polarity protection | VR = 300 V and IR = 150 nA enable reliable blocking of supply reversals in 24 V industrial modules. |
Applications
| Power Supply Input Protection | RF Signal Demodulation |
|---|---|
Use Scenario: 24 V DC input stage of industrial PLC module exposed to field wiring errors. IC Role / Device Role / Timing Role: Discrete diode configured in series with positive rail to block reverse connection. Use Value: Withstands 300 V reverse standoff and adds <0.1 V forward drop at 250 mA, minimizing efficiency loss. |
Use Scenario: AM envelope detector in UHF wireless sensor transmitter (433 MHz). IC Role / Device Role / Timing Role: Passive demodulator diode in half-wave rectifier configuration. Use Value: 2 pF capacitance and 50 ns trr preserve signal fidelity up to 100 MHz carrier harmonics. |
| Voltage Clamping in Flyback Snubbers | Logic-Level Signal Steering |
Use Scenario: Clamp diode across primary-side snubber RC network in 12 V/5 W offline flyback converter. IC Role / Device Role / Timing Role: Fast-recovery path for transformer leakage energy. Use Value: 50 ns trr prevents voltage overshoot beyond MOSFET VDS rating during 100 kHz switching transitions. |
Use Scenario: Bidirectional level-shifting interface between 3.3 V MCU GPIO and 5 V sensor bus. IC Role / Device Role / Timing Role: Passive OR-ing diode enabling signal isolation without active logic. Use Value: 150 nA IR at 250 V ensures negligible leakage-induced false triggering in high-impedance inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAS16,115 | VRRM = 80 V, trr = 4 ns, Cd = 1.5 pF - lower voltage rating but faster recovery. | Not suitable for 250 V clamping; limited to ≤30 V logic/signal paths. | Select only when VR < 80 V and sub-5 ns trr is required; verify thermal derating at 250 mA. |
| 1N4148W,115 | VRRM = 100 V, trr = 4 ns, IF = 300 mA - higher current rating but lower voltage tolerance. | Cannot replace in 200+ V reverse-bias applications; acceptable for general-purpose 5–24 V switching. | Prefer where cost sensitivity outweighs voltage margin; avoid in >100 V environments. |
Compared with BAS21J,115, BAS16,115 offers superior speed but sacrifices 220 V reverse margin, while 1N4148W,115 trades voltage capability for wider current headroom-making BAS21J,115 the sole choice for 200–300 V high-speed switching where both trr and VRRM are simultaneously critical.
Availability
BAS21J,115 is available at Aetrix Electronics and suitable for industrial power supplies, RF sensor interfaces, flyback snubber networks, and logic-level signal steering requiring stable component supply and consistent SOD323F footprint compatibility.
Supply support for BAS21J,115 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-grade and industrial SMD components.
BAS21J,115 belongs to Nexperia's high-speed switching diode product line, engineered for precision timing-critical clamping, polarity protection, and RF signal conditioning in miniaturized SMT designs.
FAQ
Is BAS21J,115 suitable for reflow soldering only?
Yes. The datasheet explicitly states "reflow soldering is the only recommended soldering method" due to thermal limitations of the SOD323F package and internal bond wire integrity. Wave or hand soldering risks delamination, voiding warranty and degrading trr and Rth(j-sp) performance.
What is the maximum continuous forward current at 75 °C ambient?
At Tamb = 75 °C, the maximum continuous forward current is derated from 250 mA (at 25 °C) using Ptot = 550 mW and VF ≈ 1.1 V. This yields IF(max) ≈ 500 mA × (550 mW / (1.1 V × 500 mA)) → ~225 mA, confirmed by Fig 1's VF–IF curve slope and thermal derating curves in the datasheet.
Does BAS21J,115 have a built-in ESD protection structure?
No. The device contains no integrated ESD protection; its HBM rating is not specified in the datasheet. External TVS or series resistors are required if used in connector-facing positions subject to human-body model discharges above 2 kV.
Can BAS21J,115 be used in place of BAS21 in legacy designs?
Yes, with identical electrical specs and SOD323F packaging. BAS21J,115 replaces BAS21 (SOT23) in newer designs requiring smaller footprint and improved thermal behavior-pin-compatible in layout but requires updated land pattern per Fig 7's 2.10 × 1.60 mm solder pad dimensions.
BAS21J,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SC-90, SOD-323F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 300 V
- Current - Average Rectified (Io):
- 250mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 100 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 150 nA @ 250 V
- Capacitance @ Vr, F:
- 2pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323F
- Operating Temperature - Junction:
- 150°C (Max)
BAS21J,115 FAQ
1.How can I place an order for BAS21J,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS21J,115 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BAS21J,115 reliable?
The price and inventory of BAS21J,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS21J,115 is usually 5 days.
3.What payment methods are accepted for BAS21J,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS21J,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS21J,115?
BAS21J,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS21J,115 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BAS21J,115?
For technical support, including BAS21J,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS21J,115 requirements.
6.How does Aetrix verify that BAS21J,115 is sourced from the original manufacturer or authorized distributors?
All BAS21J,115 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BAS21J,115 meets industry standards.
7.What is the process for return or replacement of BAS21J,115?
All BAS21J,115 units undergo pre-shipment inspection (PSI). If there is an issue with BAS21J,115, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BAS21J,115 part is unused and in its original packaging.
Return procedure for BAS21J,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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