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Diodes Incorporated BAS21TW-7
- Part No.:
- BAS21TW-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
BAS21TW-7.pdf
- Description:
- DIODE ARRAY GP 250V 200MA SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:20,870
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Product details
Overview
BAS21TW-7 from Diodes Incorporated is a surface-mount fast-switching dual diode array in SOT363 package, configured as two independent high-voltage switching diodes. It delivers 250 V repetitive peak reverse voltage, 50 ns reverse recovery time, and 200 mA continuous forward current per element-ideal for high-speed signal routing and voltage clamping in automotive body control modules.
For engineers reviewing the BAS21TW-7 datasheet, BAS21TW-7 pinout, BAS21TW-7 application, or BAS21TW-7 equivalent, key selection criteria include reverse recovery speed under 50 ns, dual-diode integration in compact SOT363, thermal resistance of 417 °C/W, and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
The BAS21TW-7 integrates two independent silicon switching diodes in a single SOT363 package, sharing no internal connection between anodes or cathodes. Each diode supports up to 250 V peak reverse voltage and exhibits 50 ns reverse recovery time at VR = 6 V and IF = 5 mA.
Its 1.05–1.25 V forward voltage (at IF = 100–200 mA) and 5 pF junction capacitance at VR = 6 V enable low-loss, high-frequency switching in discrete logic interface and transient suppression circuits where timing integrity and minimal capacitive loading are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Recovery Time | 50 ns - enables reliable operation in 10–20 MHz switching applications without tail current issues |
| Repetitive Peak Reverse Voltage | 250 V - supports use in 12/24 V automotive systems with surge margin up to ISO 7637-2 Pulse 1/2a |
| Continuous Forward Current | 200 mA per diode - sufficient for logic-level signal steering and small-signal clamp duty |
| Junction Capacitance | 5 pF at VR = 6 V - minimizes signal distortion in RF detector and high-speed data line protection |
| Thermal Resistance θJA | 417 °C/W - requires FR-4 PCB with recommended pad layout (AP02001) for safe 300 mW power dissipation |
| AEC-Q101 Qualified | Yes - validated for automotive temperature range (−65 °C to +150 °C) and mechanical stress requirements |
Pinout & Package
SOT363 is a 6-pin, dual-row, surface-mount plastic package measuring 2.20 × 1.35 × 1.00 mm (L × W × H), with matte tin-plated Alloy 42 leads, moisture sensitivity level 1, and UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Diode 1 | Input node for first diode's forward conduction path; connects to signal source or supply rail |
| Pin 2 | Cathode of Diode 1 | Output node for first diode; ties to load or reference point; forms clamping path to ground/VCC |
| Pin 3 | NC / Thermal Pad | No internal connection; may be used as heatsink anchor or ground plane tie on PCB |
| Pin 4 | Cathode of Diode 2 | Output node for second diode; electrically isolated from Pin 2; enables dual independent clamping |
| Pin 5 | Anode of Diode 2 | Input node for second diode; allows bidirectional signal routing or separate input channel handling |
| Pin 6 | NC / Thermal Pad | No internal connection; provides mechanical stability and optional thermal relief on bottom-side layout |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent diodes in one package | Reduces board space by ~40% vs. two discrete SOT23 diodes; eliminates interconnect parasitics |
| 50 ns reverse recovery time | Enables clean edge transitions in 10–20 MHz clock/data lines without overshoot or ringing |
| 250 V peak reverse voltage rating | Supports direct placement on 24 V CAN/LIN bus nodes with immunity to load-dump transients |
| AEC-Q101 qualification | Validated for automotive under-hood environments including thermal cycling, vibration, and humidity testing |
Applications
| Automotive Body Control Unit (BCU) | Industrial PLC Input Protection |
|---|---|
Use Scenario: Clamping inductive kickback from door lock actuators and mirror motors in 12 V BCU modules. IC Role / Device Role / Timing Role: Fast-switching dual diode providing bidirectional transient suppression at each actuator driver output. Use Value: Prevents MCU I/O damage during 100 V/100 µs load dump events while maintaining <50 ns response to preserve PWM timing integrity. | Use Scenario: Protecting 24 V digital input channels against ESD and field-wiring reversals in modular PLC backplanes. IC Role / Device Role / Timing Role: Dual-diode array performing polarity correction and overvoltage clamping before optocoupler input stage. Use Value: Eliminates need for four discrete diodes; reduces component count and improves channel-to-channel timing match in multi-input scan cycles. |
| USB 2.0 Data Line ESD Clamp | High-Speed Logic Level Translation |
Use Scenario: Secondary ESD protection on D+ and D− lines downstream of TVS diodes in USB host ports. IC Role / Device Role / Timing Role: Low-capacitance (5 pF) fast diode pair shunting sub-1 kV HBM transients to VBUS/GND without signal degradation. Use Value: Maintains USB 2.0 eye diagram integrity up to 480 Mbps by limiting added capacitance and ensuring <50 ns clamping latency. | Use Scenario: Bidirectional level shifting between 3.3 V microcontroller GPIOs and 5 V legacy peripherals using passive diode-resistor topology. IC Role / Device Role / Timing Role: Dual-anode/cathode configuration enabling shared pull-up architecture with matched VF across both paths. Use Value: Achieves <10 ns propagation skew between high-to-low and low-to-high transitions due to matched diode characteristics and monolithic construction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fast-switching dual diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBD2102-7-F | Same SOT363 package; 200 V VRRM; 75 ns trr; 150 mA IF | Lower voltage/speed rating limits use in 24 V automotive transients and >10 MHz signals | Select when cost sensitivity outweighs 250 V margin and 50 ns speed requirement |
| BAT54CW-7-F | 30 V VRRM; 5 ns trr; Schottky structure; 200 mA IF | Not suitable for >30 V clamping; superior speed but inadequate reverse blocking for BCU/LIN | Prefer only for low-voltage (<5 V), ultra-high-speed (<100 MHz) signal routing with zero forward drop priority |
Compared with MMBD2102-7-F and BAT54CW-7-F, the BAS21TW-7 uniquely balances 250 V blocking, 50 ns speed, and AEC-Q101 compliance-making it the only option qualified for automotive 24 V switching and industrial 24 V PLC inputs requiring simultaneous high voltage and fast recovery.
Availability
BAS21TW-7 is available at Aetrix Electronics and suitable for automotive body control units, industrial PLC input stages, and high-speed USB 2.0 ESD protection circuits requiring stable component supply across extended production lifecycles.
Supply support for BAS21TW-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
The BAS21TW-7 belongs to Diodes' AEC-Q101-qualified fast-switching diode product line, engineered specifically for automotive signal integrity and industrial transient protection where voltage margin and recovery speed must coexist.
FAQ
What is the maximum junction temperature for continuous operation?
The BAS21TW-7 supports continuous operation from −65 °C to +150 °C junction temperature. Its 417 °C/W thermal resistance requires adherence to the AP02001 recommended pad layout on FR-4 to sustain full 300 mW power dissipation at ambient temperatures up to +85 °C without exceeding TJ(max).
Is BAS21TW-7 pin-compatible with other SOT363 dual diodes?
Yes-BAS21TW-7 uses standard SOT363 pinout (Anode1/Cathode1/NC/Cathode2/Anode2/NC). It is mechanically and electrically compatible with MMBD2102-7-F and BAT54CW-7-F in layout, though electrical parameters differ significantly in VRRM, trr, and VF.
Does BAS21TW-7 support bidirectional signal clamping?
No-it contains two independent unidirectional diodes. For true bidirectional clamping, external circuitry (e.g., back-to-back configuration with resistors) is required. Each diode conducts only from anode to cathode; pins 1→2 and 5→4 define the two forward paths.
Can BAS21TW-7 replace a single SOT23 diode in existing designs?
Yes-with layout revision. Its dual-diode structure allows consolidation of two SOT23 placements into one SOT363 footprint. Pin mapping differs (SOT23 has 3 pins; SOT363 has 6), so PCB redesign and netlist updates are required, but no functional revalidation is needed if both diodes serve independent paths.
BAS21TW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 3 Independent
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 250 V
- Current - Average Rectified (Io) (per Diode):
- 200mA (DC)
- 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 @ 200 V
- Operating Temperature - Junction:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-363
BAS21TW-7 FAQ
1.How can I place an order for BAS21TW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS21TW-7 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 BAS21TW-7 reliable?
The price and inventory of BAS21TW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS21TW-7 is usually 5 days.
3.What payment methods are accepted for BAS21TW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS21TW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS21TW-7?
BAS21TW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS21TW-7 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 BAS21TW-7?
For technical support, including BAS21TW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS21TW-7 requirements.
6.How does Aetrix verify that BAS21TW-7 is sourced from the original manufacturer or authorized distributors?
All BAS21TW-7 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 BAS21TW-7 meets industry standards.
7.What is the process for return or replacement of BAS21TW-7?
All BAS21TW-7 units undergo pre-shipment inspection (PSI). If there is an issue with BAS21TW-7, 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 BAS21TW-7 part is unused and in its original packaging.
Return procedure for BAS21TW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS21TW-7 Tags
-
BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
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BAT54SLT1G
onsemi
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BAV70LT1G
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BAT54CLT1G
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
onsemi
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BAT54S,215
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MMBD1503-TP
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BAV99WT1G
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