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Nexperia USA Inc. BAS21JF
- Part No.:
- BAS21JF
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SC-90, SOD-323F
- Datasheet:
-
BAS21JF.pdf
- Description:
- DIODE GP 300V 250MA SOD323F
- Quantity:
- Payment:
- Shipping:
Inventory:9,685
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Product details
Overview
BAS21JF from Nexperia is a single high-speed switching diode in SOD323F (SC-90) surface-mount package, designed for fast reverse recovery (trr ≤50 ns), low junction capacitance (Cd ≤2 pF), and high reverse voltage blocking (VRRM = 300 V). It serves as a clamping or polarity protection device in DC-DC converters, ESD-sensitive signal paths, and high-frequency rectification circuits.
For engineers reviewing the BAS21JF datasheet, BAS21JF pinout, BAS21JF application, or BAS21JF equivalent, key selection criteria include verified trr performance under 30 mA switching conditions, cathode-anode polarity marking on SOD323F body, thermal resistance to solder point (Rth(j-sp) = 55 K/W), and compliance with IEC 60134 absolute maximum ratings.
Technical Context
This diode operates as a unidirectional charge carrier switch with minority-carrier transport mechanism optimized for speed over forward conduction efficiency. Its 300 V repetitive peak reverse voltage rating enables use in 24 V–48 V industrial bus clamping and flyback snubber networks where transient suppression exceeds 200 V.
The SOD323F package provides coplanar leads and low thermal resistance to PCB (Rth(j-a) = 230 K/W in free air), supporting reflow-only assembly per JEDEC J-STD-020. Junction temperature is rated to 150 °C, with leakage current tightly controlled at 150 nA @ VR = 250 V and 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 300 V - supports transient clamping in 24 V/48 V power rails without breakdown |
| trr | ≤50 ns - enables operation in >5 MHz switching circuits with minimal tail current loss |
| Cd | ≤2 pF @ VR = 0 V, f = 1 MHz - minimizes capacitive loading on RF or high-speed digital signal lines |
| IF(max) | 250 mA continuous - suitable for low-power logic-level signal routing and bias network switching |
| IR | 150 nA @ VR = 250 V, 25 °C - ensures negligible leakage in battery-backed or ultra-low-power hold-up circuits |
| Rth(j-sp) | 55 K/W - allows direct thermal coupling to copper pour via cathode pad for localized heat dissipation |
Pinout & Package
SOD323F (SC-90) is a 2-pin ultra-compact surface-mount plastic package with flat, coplanar leads and cathode-marked top-side bar. Dimensions: 2.7 mm × 1.6 mm × 0.95 mm (L × W × H), lead pitch 0.5 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Marked side of package; connects to lower-potential node during conduction; primary thermal path to PCB copper |
| 2 | Anode | Unmarked terminal; accepts forward bias input; electrically isolated from thermal pad in standard layout |
Key Features
| Feature | Design Value |
|---|---|
| High-speed switching | trr ≤50 ns measured at IF/IR = 30 mA, RL = 100 Ω - reduces switching losses in PWM-driven clamp circuits |
| Low capacitance | Cd ≤2 pF at 0 V reverse bias - preserves signal integrity in 100+ MHz data line protection |
| Robust thermal behavior | Rth(j-sp) = 55 K/W - enables stable operation under pulsed 1 A IFRM surges when mounted on ≥1 cm² cathode pad |
| Reverse polarity protection | VR = 300 V with IR ≤150 nA - blocks reverse feed in dual-supply systems while drawing sub-nA standby current |
Applications
| DC-DC Converter Snubbing | ESD-Sensitive Signal Clamping |
|---|---|
Use Scenario: Suppresses voltage spikes across MOSFET drains in 500 kHz–2 MHz buck converters. IC Role / Device Role / Timing Role: Fast-recovery clamp diode placed between drain and output rail to absorb inductive kickback. Use Value: 50 ns trr limits energy dissipation in snubber resistor; 300 V VRRM accommodates 24 V system transients up to 280 V. |
Use Scenario: Protects USB 2.0 D+/D− lines from ±8 kV contact ESD per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance shunt diode tied between signal line and ground, conducting only during ESD event. Use Value: 2 pF Cd avoids signal distortion at 480 Mbps; 150 nA IR prevents DC loading on 1.8 V/3.3 V data lines. |
| Reverse Polarity Input Protection | High-Frequency Rectification |
Use Scenario: Prevents damage from accidental reverse connection of 12 V/24 V wall adapters or battery packs. IC Role / Device Role / Timing Role: Series-connected anode-to-input, cathode-to-system rail; conducts only during correct polarity. Use Value: 250 mA IF rating supports typical IoT node input currents; 300 V VR withstands load-dump transients in automotive auxiliary ports. |
Use Scenario: Full-wave rectification in 1–10 MHz RF detector or envelope demodulator stages. IC Role / Device Role / Timing Role: Discrete diode in half-wave or voltage-doubler configuration operating above audio frequencies. Use Value: 50 ns trr ensures minimal phase lag and harmonic distortion; low Cd avoids self-resonance below 100 MHz. |
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 |
|---|---|---|---|
| BAS16JF | VRRM = 100 V, trr ≤4 ns, Cd ≤2 pF | Limited to ≤12 V systems; faster but lower voltage margin | Select when ultra-fast recovery (<5 ns) is critical and reverse voltage stays below 80 V |
| 1N4148W | VRRM = 100 V, trr ≤4 ns, IF = 300 mA, SOD-123 package | Larger footprint (SOD-123 vs SOD323F); higher thermal resistance (Rth(j-a) ≈ 300 K/W) | Choose for legacy board compatibility or where 300 mA forward current is required over compactness |
Compared with BAS21JF, BAS16JF trades 200 V voltage headroom for 45 ns faster recovery, while 1N4148W sacrifices miniaturization and thermal performance for broader industry familiarity and higher IF rating - making BAS21JF optimal for space-constrained 24–48 V clamping where 50 ns trr suffices.
Availability
BAS21JF is available at Aetrix Electronics and suitable for DC-DC converter snubbing, ESD-sensitive signal clamping, and reverse polarity input protection requiring stable component supply across industrial control, IoT edge nodes, and automotive body electronics programs.
Supply support for BAS21JF 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-qualified small-signal diodes and MOSFETs.
BAS21JF belongs to Nexperia's high-speed switching diode product line, engineered specifically for compact, thermally efficient clamping and protection in space-constrained power and interface circuits.
FAQ
Is BAS21JF suitable for reflow soldering only?
Yes - Nexperia explicitly specifies reflow soldering as the only recommended method for BAS21JF. The SOD323F package is not qualified for wave or hand soldering due to thermal stress sensitivity and coplanarity requirements. Reflow profiles must comply with JEDEC J-STD-020, peak temperature ≤260 °C, and time above 217 °C limited to 60–150 seconds.
What is the maximum allowable forward surge current for BAS21JF?
The non-repetitive peak forward current (IFSM) is 3 A for 100 µs pulses, 2.3 A for 1 ms, and 1.7 A for 10 ms, per IEC 60134 limiting values. These ratings assume Tj = 25 °C prior to surge and mounting on FR4 PCB with 1 cm² cathode pad. Exceeding these values risks permanent junction damage.
How is cathode polarity marked on the BAS21JF package?
A distinct bar marking on the top surface of the SOD323F body identifies Pin 1 as the cathode. This marking aligns with the simplified outline in Nexperia's datasheet Figure 2 and is visible under 20× magnification. No additional silkscreen or laser marking is used - the bar is molded into the plastic package.
Does BAS21JF meet automotive AEC-Q101 requirements?
No - BAS21JF is not AEC-Q101 qualified. It is rated for industrial temperature range (−65 °C to +150 °C) and intended for commercial/industrial applications. For automotive use, Nexperia offers the AEC-Q101-qualified PNP2101 series or BAS21,215 (Q101 variant), which share identical electrical specs but undergo extended reliability testing.
BAS21JF 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:
- 100 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)
BAS21JF FAQ
1.How can I place an order for BAS21JF through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS21JF 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 BAS21JF reliable?
The price and inventory of BAS21JF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS21JF is usually 5 days.
3.What payment methods are accepted for BAS21JF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS21JF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS21JF?
BAS21JF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS21JF 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 BAS21JF?
For technical support, including BAS21JF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS21JF requirements.
6.How does Aetrix verify that BAS21JF is sourced from the original manufacturer or authorized distributors?
All BAS21JF 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 BAS21JF meets industry standards.
7.What is the process for return or replacement of BAS21JF?
All BAS21JF units undergo pre-shipment inspection (PSI). If there is an issue with BAS21JF, 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 BAS21JF part is unused and in its original packaging.
Return procedure for BAS21JF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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