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Nexperia USA Inc. BAS20,235
- Part No.:
- BAS20,235
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAS20,235.pdf
- Description:
- DIODE GP 150V 200MA TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,973
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Product details
Overview
BAS20,235 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); used for voltage clamping and reverse polarity protection in DC power rails and industrial control interfaces.
For engineers reviewing the BAS20,235 datasheet, BAS20,235 pinout, BAS20,235 application, or BAS20,235 equivalent, key selection criteria include verified VRRM ≥ 200 V, trr ≤ 50 ns under IF = 30 mA / IR = 30 mA test conditions, low leakage (IR ≤ 100 nA at VR = 150 V, Tj = 25 °C), and SOT23-compatible thermal derating to 200 mA at Tamb = 70 °C.
Technical Context
The BAS20,235 is a silicon planar epitaxial high-speed switching diode optimized for fast turn-off in high-voltage transient suppression and DC rail protection circuits. Its junction design achieves trr ≤ 50 ns with 30 mA forward/reverse current switching and maintains Cd ≤ 5 pF at 0 V bias, enabling minimal signal distortion in clamp paths.
It operates across –55 °C to +150 °C junction temperature range with absolute maximum ratings including 200 V VRRM, 200 mA continuous forward current (IF), and 9 A non-repetitive peak forward surge (IFSM, tp = 1 µs). Thermal resistance Rth(j-a) is 500 K/W on FR4 PCB, limiting power dissipation to 250 mW at Tamb ≤ 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - supports clamping of transients up to 200 V peak without breakdown |
| trr | 50 ns - enables reliable switching at >1 MHz in flyback snubbers and logic-level protection |
| VF @ 200 mA | 1.25 V - limits conduction loss to <250 mW per diode in series-connected protection paths |
| IR @ 150 V, 25 °C | 100 nA - ensures negligible leakage in high-impedance voltage monitor or reference circuits |
| Cd @ 0 V, 1 MHz | 5 pF - minimizes capacitive loading on high-frequency signal lines during clamping |
| Rth(j-a) | 500 K/W - requires thermal derating to ~120 mA at Tamb = 85 °C on standard FR4 |
Pinout & Package
Package: SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward current entry point; connects to positive side of protected circuit or clamp node |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or solder joint required |
| 3 | Cathode (K) | Forward current exit and reverse voltage reference; ties to ground or lower-potential rail |
Key Features
| Feature | Design Value |
|---|---|
| High-speed switching | trr ≤ 50 ns enables use in 1–2 MHz switching power supply snubbers and pulse clamps |
| Low junction capacitance | Cd ≤ 5 pF preserves signal integrity in RF detector inputs and high-speed data line protection |
| High reverse voltage rating | VRRM = 200 V supports 48 V telecom, 24 V industrial, and 12 V automotive auxiliary rail protection |
| Thermally robust SOT23 | Rth(j-sp) = 330 K/W allows localized heat extraction via cathode pad to copper pour |
Applications
| Industrial Power Supply Clamping | Reverse Polarity Protection |
|---|---|
Use Scenario: Clamp inductive kickback from solenoid drivers and relay coils in PLC I/O modules. IC Role / Device Role / Timing Role: Fast-switching diode absorbing energy during MOSFET turn-off; acts as passive transient suppressor. Use Value: Prevents >200 V spikes from damaging 30 V-rated gate drivers using its 200 V VRRM and 50 ns trr. |
Use Scenario: Series protection on 24 V DC input of factory automation sensors. IC Role / Device Role / Timing Role: Anode-to-input, cathode-to-load; blocks reverse connection while conducting forward current. Use Value: Limits forward drop to 1.25 V at 200 mA, minimizing power loss and heat rise in compact enclosures. |
| High-Speed Logic-Level Clamping | DC Rail Voltage Clamping |
Use Scenario: Protecting microcontroller GPIO pins against ESD and overvoltage in HMI panels. IC Role / Device Role / Timing Role: Cathode-to-VCC, anode-to-signal line; clamps positive transients to VCC + VF. Use Value: 5 pF capacitance avoids signal edge degradation on 10 MHz digital lines; 100 nA leakage preserves sleep-mode current. |
Use Scenario: Clamp overvoltage on 12 V battery-backed backup rails in medical monitoring devices. IC Role / Device Role / Timing Role: Bidirectional clamp configuration (two diodes) referenced to VBAT and GND. Use Value: Withstands 150 V reverse bias continuously and handles 100 µA leakage at 150 °C junction temp for long-term reliability. |
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, VF = 1.25 V @ 200 mA - identical electrical specs but higher IR (200 nA @ 150 V, 25 °C) | Same SOT23 footprint; slightly higher leakage may affect ultra-low-power sensor bias networks | Preferred where second-source qualification is required; verify leakage impact in high-Z analog front-ends |
| Diodes Incorporated BAV20W-7-F | VRRM = 200 V, trr = 50 ns, VF = 1.25 V @ 200 mA - same core specs but Cd = 6 pF and Rth(j-a) = 550 K/W | Marginally higher capacitance and thermal resistance limit use in >1 MHz or high-density thermal layouts | Acceptable for cost-sensitive industrial controls where 1 MHz operation and FR4 thermal margin are not critical |
Compared with MMBD2004LT1G and BAV20W-7-F, BAS20,235 offers the lowest IR (100 nA) and best thermal performance (Rth(j-a) = 500 K/W), making it optimal for precision clamp circuits and thermally constrained PCBs.
Availability
BAS20,235 is available at Aetrix Electronics and suitable for industrial power supply clamping, reverse polarity protection, and high-speed logic-level clamping requiring stable component supply and consistent SOT23 assembly compatibility.
Supply support for BAS20,235 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 and industrial-grade components.
The BAS20,235 belongs to Nexperia's high-voltage switching diode product line, engineered specifically for robust transient suppression and DC rail protection in industrial automation, power conversion, and instrumentation systems.
FAQ
Is BAS20,235 suitable for automotive applications?
No. The BAS20,235 is explicitly marked as non-automotive qualified in its revision history. It lacks AEC-Q101 qualification, has no automotive-grade screening, and is not tested to automotive temperature or reliability standards. For automotive use, Nexperia recommends the BAS20-Q variant or other AEC-Q101-certified alternatives.
What is the maximum continuous forward current at 85 °C ambient?
Per the derating curve (Figure 5), the maximum continuous forward current drops to approximately 120 mA at Tamb = 85 °C on a standard FR4 PCB. This is derived from linear derating starting at 200 mA at 25 °C and reaching zero at ~150 °C, consistent with its 500 K/W Rth(j-a) and 250 mW Ptot rating.
Can Pin 2 be used as a thermal pad or grounded?
No. Pin 2 is internally not connected (n.c.), as confirmed in Table 2 and Figure 8. It must remain electrically floating-neither tied to ground nor used for thermal conduction. Soldering or routing to any net risks mechanical stress or unintended parasitic coupling without functional benefit.
How does BAS20,235 compare to BAS16 in high-voltage applications?
BAS20,235 has VRRM = 200 V versus BAS16's 100 V, making it unsuitable as a direct replacement where >100 V transients occur. Its trr (50 ns) matches BAS16, but its higher VR rating and lower IR (100 nA vs. 500 nA for BAS16) provide superior clamping margin and leakage performance in 24–48 V systems.
BAS20,235 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):
- 150 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):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 100 nA @ 150 V
- Capacitance @ Vr, F:
- 5pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
- Operating Temperature - Junction:
- 150°C (Max)
BAS20,235 FAQ
1.How can I place an order for BAS20,235 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS20,235 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 BAS20,235 reliable?
The price and inventory of BAS20,235 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS20,235 is usually 5 days.
3.What payment methods are accepted for BAS20,235?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS20,235 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS20,235?
BAS20,235 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS20,235 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 BAS20,235?
For technical support, including BAS20,235 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS20,235 requirements.
6.How does Aetrix verify that BAS20,235 is sourced from the original manufacturer or authorized distributors?
All BAS20,235 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 BAS20,235 meets industry standards.
7.What is the process for return or replacement of BAS20,235?
All BAS20,235 units undergo pre-shipment inspection (PSI). If there is an issue with BAS20,235, 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 BAS20,235 part is unused and in its original packaging.
Return procedure for BAS20,235:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS20,235 Tags
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