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Diodes Incorporated BAS28-7
- Part No.:
- BAS28-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
BAS28-7.pdf
- Description:
- DIODE ARRAY GP 85V 215MA SOT-143
- Quantity:
- Payment:
- Shipping:
Inventory:44,972
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Product details
Overview
BAS28-7 from Diodes Incorporated is a dual surface-mount fast-switching diode in SOT143 package, featuring two electrically isolated diode elements with 85 V repetitive peak reverse voltage, 215 mA forward current rating, and 4 ns reverse-recovery time-optimized for high-speed signal routing and clamping in automotive and industrial control circuits.
For engineers reviewing the BAS28-7 datasheet, BAS28-7 pinout, BAS28-7 application, or BAS28-7 equivalent, key selection criteria include reverse recovery speed, dual-element isolation integrity, thermal derating behavior at elevated ambient temperatures, and JEDEC-qualified reliability for automotive-grade deployments.
Technical Context
The BAS28-7 integrates two independent silicon switching diodes in a single SOT143 package, each rated for 85 V VRRM and capable of 4 ns tRR under 10 mA IF/IR conditions with 100 Ω load. Its low 1.5 pF total capacitance at 0 V bias supports RF and high-frequency digital signal integrity.
Thermal design is constrained by 500 °C/W RθJA on FR-4 board and 250 mW power dissipation limit at 25 °C ambient, with linear derating to zero at 150 °C-requiring careful layout per Diodes' recommended pad dimensions to maintain junction temperature within -65 °C to +150 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 85 V - maximum repetitive reverse voltage each diode withstands without breakdown |
| tRR | 4 ns - reverse recovery time enabling >100 MHz switching in clamping and sampling circuits |
| IF | 215 mA - continuous forward current per element, defining max DC signal path handling |
| CT | 1.5 pF - total junction capacitance at 0 V, critical for high-speed signal integrity |
| RθJA | 500 °C/W - thermal resistance limiting power handling on standard FR-4 PCB layouts |
| TJ Range | -65 °C to +150 °C - qualified operating junction temperature for automotive AEC-Q stress profiles |
Pinout & Package
Package: SOT143 - 4-pin surface-mount plastic package with gull-wing leads, 0.009 g mass, UL 94V-0 rated molding compound, and matte tin annealed terminals solderable per MIL-STD-202.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Diode 1 | Input node for first diode element; polarity-marked with bar on top-side marking |
| Pin 2 | Cathode of Diode 1 | Output/return node for Diode 1; electrically isolated from Pin 4 |
| Pin 3 | Cathode of Diode 2 | Output/return node for second diode; shares no internal connection with Pin 2 |
| Pin 4 | Anode of Diode 2 | Input node for second diode element; fully isolated from Pin 1 |
Key Features
| Feature | Design Value |
|---|---|
| Fast switching speed | 4 ns tRR enables use in >100 MHz clock line clamping and pulse shaping |
| Dual isolated elements | Two independent diodes in one footprint reduce board area vs. discrete SOT23 solutions |
| JEDEC-qualified reliability | Qualified per AEC-Q standards for automotive applications requiring high-temperature stability |
| Green, RoHS-compliant construction | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) meets EU regulatory mandates |
Applications
| Automotive Signal Clamping | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN transceiver inputs against ESD-induced voltage overshoot in 12 V vehicle networks. IC Role / Device Role / Timing Role: Fast clamping diode shunting transient energy before it reaches sensitive receiver circuitry. Use Value: 4 ns tRR and 85 V VRRM ensure minimal signal distortion during 15 kV contact discharge events. | Use Scenario: Isolating logic-level signals between microcontroller GPIO and external sensors in PLC modules. IC Role / Device Role / Timing Role: Dual-diode configuration provides bidirectional protection on differential lines without cross-talk. Use Value: Electrically isolated anode/cathode pairs prevent ground-loop coupling between channel groups. |
| RF Detector Biasing | High-Speed Sample-and-Hold Circuits |
Use Scenario: Providing temperature-stable DC bias to Schottky detector diodes in 2.4 GHz ISM-band receivers. IC Role / Device Role / Timing Role: Low-capacitance (1.5 pF) switching diode used as precision DC path selector. Use Value: Minimal parasitic capacitance preserves detector Q-factor and insertion loss below 0.1 dB at 2.4 GHz. | Use Scenario: Implementing hold-phase discharge path in 10 MS/s data acquisition front-ends. IC Role / Device Role / Timing Role: Fast-recovery diode controlling capacitor discharge timing in analog sample-hold stages. Use Value: Consistent 4 ns tRR ensures sub-10 ns hold-to-acquire transition repeatability across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual fast-switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BAS21-7 | Higher VRRM (250 V), slower tRR (50 ns), same SOT143 package | Preferred for higher-voltage transient suppression where speed is secondary | Select when reverse voltage margin >150 V is required and 4 ns recovery is not critical |
| BAS16-7 | Lower VRRM (80 V), identical tRR (4 ns), same SOT143 footprint | Suitable for 5 V–24 V logic-level clamping with tighter voltage tolerance | Choose when system rail voltages stay below 60 V and JEDEC qualification is not mandatory |
Compared with BAS21-7 and BAS16-7, the BAS28-7 uniquely balances 85 V blocking capability with 4 ns recovery and AEC-Q qualification-making it optimal for automotive signal integrity where both voltage margin and nanosecond timing coexist.
Availability
BAS28-7 is available at Aetrix Electronics and suitable for automotive signal clamping, industrial digital I/O protection, RF detector biasing, and high-speed sample-and-hold circuits requiring stable component supply across production lifecycles.
Supply support for BAS28-7 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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
The BAS28 belongs to Diodes' high-reliability switching diode product line, engineered specifically for automotive and industrial applications demanding fast recovery, dual-element integration, and extended temperature operation.
FAQ
What is the maximum junction temperature for continuous operation of the BAS28-7?
The BAS28-7 has a specified operating junction temperature range of -65 °C to +150 °C. Continuous operation must maintain TJ within this window, with thermal design guided by its 500 °C/W RθJA and 250 mW PD rating at 25 °C ambient-derating linearly to zero at 150 °C per Figure 1 in the datasheet.
Does the BAS28-7 meet automotive qualification standards?
Yes-the BAS28-7 is qualified to JEDEC standards referenced in AEC-Q for high reliability, and an automotive-compliant variant (BAS28Q) is documented separately. Its -65 °C to +150 °C operating range, green material composition, and SOT143 mechanical robustness align with automotive environmental stress requirements.
How are the two diodes arranged internally in the SOT143 package?
The BAS28-7 contains two fully electrically isolated diode elements. Pin 1 (Anode 1) and Pin 2 (Cathode 1) form the first diode; Pin 4 (Anode 2) and Pin 3 (Cathode 2) form the second. No internal connection exists between either anode or cathode terminals-confirmed by schematic and isolation testing in DS37988 Rev. 3-2.
Can the BAS28-7 replace the BAS16-7 in existing designs?
Yes, with verification: both share identical SOT143 footprint and 4 ns tRR, but BAS28-7 offers 85 V VRRM versus 80 V for BAS16-7. Layout compatibility is confirmed, though system-level validation of reverse voltage margin and thermal performance under worst-case transients is required before substitution.
BAS28-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-253-4, TO-253AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 2 Independent
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 85 V
- Current - Average Rectified (Io) (per Diode):
- 215mA (DC)
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 V @ 150 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 4 ns
- Current - Reverse Leakage @ Vr:
- 1 µA @ 75 V
- Operating Temperature - Junction:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143
BAS28-7 FAQ
1.How can I place an order for BAS28-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS28-7 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 BAS28-7 reliable?
The price and inventory of BAS28-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS28-7 is usually 5 days.
3.What payment methods are accepted for BAS28-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS28-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS28-7?
BAS28-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS28-7 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 BAS28-7?
For technical support, including BAS28-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS28-7 requirements.
6.How does Aetrix verify that BAS28-7 is sourced from the original manufacturer or authorized distributors?
All BAS28-7 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 BAS28-7 meets industry standards.
7.What is the process for return or replacement of BAS28-7?
All BAS28-7 units undergo pre-shipment inspection (PSI). If there is an issue with BAS28-7, 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 BAS28-7 part is unused and in its original packaging.
Return procedure for BAS28-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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