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Nexperia USA Inc. BAS20-QR
- Part No.:
- BAS20-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAS20-QR.pdf
- Description:
- BAS20-Q/SOT23/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,363
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Product details
Overview
BAS20-QR from Nexperia is a high-voltage switching diode in SOT23 package, rated for 200 V repetitive peak reverse voltage (VRRM), 1.25 V forward voltage at 200 mA, and 50 ns reverse recovery time (trr). It delivers low leakage (100 nA at 150 V, 25 °C), 5 pF capacitance, and AEC-Q101 qualification-designed for automotive-grade voltage clamping and reverse polarity protection circuits.
For engineers reviewing the BAS20-QR datasheet, BAS20-QR pinout, BAS20-QR application, or BAS20-QR equivalent, key selection criteria include verified VRRM margin above 150 V system rails, trr ≤ 50 ns for <1 MHz switching, thermal resistance (Rth(j-a) = 500 K/W), and SOT23 footprint compatibility with space-constrained PCB layouts.
Technical Context
The BAS20-QR operates as a unidirectional silicon switching diode optimized for fast turn-off under high-voltage bias. Its junction structure enables stable reverse blocking up to 200 V while maintaining sub-50 ns recovery-critical for flyback snubbers and DC-DC converter freewheeling paths where dV/dt exceeds 100 V/ns.
Thermal performance is defined by Rth(j-a) = 500 K/W on FR4 and Rth(j-sp) = 330 K/W to solder point, supporting continuous 200 mA forward current only below 70 °C ambient per derating curve. Reverse leakage remains ≤100 µA at Tj = 150 °C, ensuring reliability in under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - supports 150 V nominal bus designs with 33 % safety margin against transients |
| trr | 50 ns - enables clean commutation in 1–2 MHz switching converters without tail current loss |
| VF @ 200 mA | 1.25 V - limits conduction loss to ≤250 mW at full rated current |
| Cd | 5 pF @ 0 V - minimizes capacitive loading on high-impedance gate drive or signal nodes |
| IR @ 150 V, 25 °C | 100 nA - ensures negligible standby power drain in battery-backed clamping circuits |
| Ptot | 250 mW @ Tamb ≤ 25 °C - defines maximum dissipation before thermal derating applies |
| Rth(j-a) | 500 K/W - requires ≥10 mm² copper pour for sustained 200 mA operation at 70 °C ambient |
Pinout & Package
Package: SOT23 plastic surface-mount package (3 terminals, 1.9 mm pitch, 2.9 × 1.3 × 1.0 mm body).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connects to higher-potential node in clamping or rectification path |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress |
| 3 | Cathode (K) | Forward current exit and reverse-blocking terminal; ties to ground or return rail in polarity protection |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood use (−40 °C to +150 °C junction), including temperature cycling and HTRB |
| Low Cd (5 pF) | Reduces high-frequency signal distortion in ESD protection networks and RF detector inputs |
| High VRRM/VR ratio | 200 V/150 V rating enables robust surge handling beyond steady-state reverse bias requirements |
| Fast trr ≤ 50 ns | Minimizes reverse recovery charge (Qrr) in synchronous rectifier flyback topologies |
| SOT23 footprint | Enables automated placement and reflow on dense automotive control boards without lead-free compatibility issues |
Applications
| Automotive Reverse Polarity Protection | DC-DC Converter Snubber Diode |
|---|---|
Use Scenario: Installed in series with battery input of infotainment head units to block reverse connection damage. IC Role / Device Role / Timing Role: Unidirectional blocking element conducting only during correct polarity; no timing function. Use Value: Withstands 200 V transients per ISO 7637-2 Pulse 5a while adding <1.3 V drop at 200 mA load. |
Use Scenario: Placed across primary-side MOSFET in 48 V–12 V buck converter to clamp inductive kick. IC Role / Device Role / Timing Role: Fast-recovery clamping diode absorbing energy during MOSFET turn-off edge. Use Value: 50 ns trr prevents voltage overshoot >10 % above 48 V rail during 500 kHz switching. |
| Voltage Clamping in Sensor Signal Conditioning | ESD Protection Interface Diode |
Use Scenario: Connected between LIN bus line and ground to limit transients to ±30 V in body control modules. IC Role / Device Role / Timing Role: High-voltage clamp limiting line voltage during load dump or inductive spikes. Use Value: 200 V VRRM provides 3× margin over 60 V max LIN transient specification. |
Use Scenario: Integrated into CAN FD transceiver I/O protection network for external connector pins. IC Role / Device Role / Timing Role: Low-capacitance (5 pF) shunt diode diverting ESD pulses to ground without signal degradation. Use Value: Sub-5 pF capacitance preserves signal integrity up to 5 Mbps CAN FD data rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBD2004LT1G | VRRM = 200 V, trr = 50 ns, but IF rating = 250 mA and Rth(j-a) = 400 K/W | Higher current capability suits 12 V starter motor interface; less thermally constrained on small pads | Select when board layout allows larger thermal relief or when 250 mA continuous rating is required |
| Diodes Incorporated BAV20W-7-F | VRRM = 150 V (not 200 V), trr = 50 ns, same SOT23 package and AEC-Q101 qualification | Limited to 150 V systems; unsuitable for 200 V load-dump immunity without additional TVS coordination | Acceptable only if system VRRM requirement is capped at 150 V and cost sensitivity outweighs margin needs |
Compared with MMBD2004LT1G and BAV20W-7-F, the BAS20-QR uniquely balances 200 V VRRM, 50 ns trr, and AEC-Q101 compliance in a thermally defined 250 mW envelope-making it optimal for space-limited 48 V automotive subsystems requiring both surge margin and fast recovery.
Availability
BAS20-QR is available at Aetrix Electronics and suitable for automotive reverse polarity protection, DC-DC snubber circuits, and LIN bus voltage clamping requiring stable component supply across production lifecycles.
Supply support for BAS20-QR 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 core expertise in automotive-qualified components and advanced packaging.
The BAS20-QR belongs to Nexperia's AEC-Q101-qualified high-voltage diode product line, engineered specifically for automotive power management and signal integrity applications demanding robust transient immunity and fast switching.
FAQ
Is BAS20-QR suitable for 48 V mild-hybrid vehicle systems?
Yes. The 200 V VRRM rating exceeds ISO 16750-2 load-dump requirements (up to 110 V) and supports 48 V bus architectures with margin for transients. Its AEC-Q101 qualification, 150 °C junction rating, and SOT23 thermal profile make it appropriate for under-hood ECUs and DC-DC controllers in mild-hybrid platforms.
What is the maximum continuous forward current at 100 °C ambient?
Per Figure 5 in the datasheet, the maximum continuous forward current drops to approximately 120 mA at 100 °C ambient on standard FR4. This is derived from the 200 mA rating at 25 °C and linear derating slope of −1.6 mA/°C above 25 °C, confirmed by the published derating curve.
Can BAS20-QR replace BAS16 in existing designs?
No. While both are SOT23 switching diodes, BAS20-QR has higher VRRM (200 V vs. 85 V) and slower trr (50 ns vs. 4 ns), making it unsuitable for high-speed signal routing. It is intended for high-voltage, not high-frequency, applications-replacing BAS16 would risk excessive switching loss in >10 MHz circuits.
Does BAS20-QR require special PCB layout considerations for thermal performance?
Yes. With Rth(j-a) = 500 K/W, achieving full 200 mA rating requires ≥10 mm² of 2 oz copper connected to pin 1 (anode) and pin 3 (cathode). Avoid routing high-current traces over thermal reliefs, and ensure solder mask openings match the recommended reflow footprint in Figure 9 to maximize heat transfer to the board.
BAS20-QR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 V @ 200 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 150 V
- Capacitance @ Vr, F:
- 5pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
- Operating Temperature - Junction:
- 150°C
BAS20-QR FAQ
1.How can I place an order for BAS20-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS20-QR 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 BAS20-QR reliable?
The price and inventory of BAS20-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS20-QR is usually 5 days.
3.What payment methods are accepted for BAS20-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS20-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS20-QR?
BAS20-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS20-QR 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 BAS20-QR?
For technical support, including BAS20-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS20-QR requirements.
6.How does Aetrix verify that BAS20-QR is sourced from the original manufacturer or authorized distributors?
All BAS20-QR 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 BAS20-QR meets industry standards.
7.What is the process for return or replacement of BAS20-QR?
All BAS20-QR units undergo pre-shipment inspection (PSI). If there is an issue with BAS20-QR, 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 BAS20-QR part is unused and in its original packaging.
Return procedure for BAS20-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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