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Diodes Incorporated BAS28Q-13
- Part No.:
- BAS28Q-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
BAS28Q-13.pdf
- Description:
- DIODE ARRAY GP 85V 215MA SOT-143
- Quantity:
- Payment:
- Shipping:
Inventory:9,859
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Product details
Overview
BAS28Q from Diodes Incorporated is a dual, electrically isolated, surface-mount fast-switching diode in SOT143 package, rated for 85 V repetitive peak reverse voltage, 215 mA forward current, and 4 ns reverse-recovery time. It delivers low forward voltage (0.715 V at 1 mA) and ultra-low junction capacitance (1.5 pF at 0 V), enabling high-speed signal routing and clamping in automotive power management and communication interfaces.
For engineers reviewing the BAS28Q datasheet, BAS28Q pinout, BAS28Q application, or BAS28Q equivalent, this AEC-Q101-qualified dual diode supports design-in for ESD protection, level translation, and high-frequency rectification where compact dual-element isolation and sub-5 ns switching are required.
Technical Context
The BAS28Q integrates two independent silicon PN junction diodes in a single SOT143 package with no internal connection between anodes or cathodes. Each element exhibits matched electrical characteristics including identical 85 V VRRM, 4 ns tRR, and 1.5 pF CT at 0 V.
Its thermal resistance of 500 °C/W (junction-to-ambient, FR-4 board) and 250 mW power dissipation rating define its usable current envelope under ambient conditions up to +150 °C, with derating beginning at +25 °C per Figure 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 85 V - Maximum reverse voltage each diode withstands without breakdown; enables use in 48 V automotive supply rail clamping. |
| tRR | 4 ns - Measured at IF = IR = 10 mA, IRR = 1 mA; supports >100 MHz switching in RF detector and sample-and-hold circuits. |
| VF @ 1 mA | 0.715 V - Low forward drop minimizes conduction loss in low-current bias and logic-level signal steering. |
| CT @ 0 V | 1.5 pF - Junction capacitance limits high-frequency loading; suitable for <1 GHz signal path applications. |
| IFRM | 500 mA - Repetitive peak forward current rating allows short-duration surge handling in transient suppression. |
| TJ Range | −65 to +150 °C - Full automotive temperature operation confirmed by AEC-Q101 qualification and IATF 16949 manufacturing. |
Pinout & Package
Package: SOT143 - 4-terminal plastic surface-mount package with gull-wing leads, 0.009 g mass, UL 94V-0 molding compound, and matte tin–annealed Alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Diode 1 | Input node for first diode; connects to signal source or positive rail in clamp/rectify configurations. |
| Pin 2 | Cathode of Diode 1 | Output node for first diode; ties to load or reference point; reverse-biased during clamping. |
| Pin 3 | Anode of Diode 2 | Independent input node for second diode; enables dual-path signal conditioning without shared terminals. |
| Pin 4 | Cathode of Diode 2 | Independent output node for second diode; supports separate biasing or termination from Diode 1. |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated elements | Two fully independent diodes in one SOT143 footprint-reduces PCB area by ~40% vs. discrete SOT23 pair. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including HTOL, TCT, and ESD testing per JESD47; PPAP capable. |
| Green, halogen-free | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb; compliant with RoHS 3 (2015/863/EU) and automotive environmental mandates. |
| Fast tRR & low CT | 4 ns recovery + 1.5 pF capacitance enables clean edge preservation in 100+ MHz digital and RF signal paths. |
Applications
| Automotive CAN Bus Protection | High-Speed Logic-Level Translation |
|---|---|
|
Use Scenario: Bidirectional signal clamping on CAN_H/CAN_L lines against ±30 kV ESD transients per ISO 10605. IC Role / Device Role / Timing Role: Fast-switching clamp diode protecting transceiver I/O pins while preserving bus timing integrity. Use Value: 4 ns tRR prevents pulse distortion during ESD events; dual isolation allows independent clamping on both differential lines. |
Use Scenario: Level shifting between 3.3 V microcontroller GPIO and 5 V peripheral interface with minimal propagation delay. IC Role / Device Role / Timing Role: Passive diode-based translator using forward conduction threshold to gate voltage transfer. Use Value: 0.715 V VF at 1 mA ensures accurate 3.3 V → 5 V translation without active circuitry or timing skew. |
| RF Detector Input Stage | Low-Power Sensor Signal Conditioning |
|
Use Scenario: Demodulating AM signals in 868 MHz ISM-band wireless sensor nodes with minimal insertion loss. IC Role / Device Role / Timing Role: Zero-bias envelope detector diode converting RF carrier amplitude to baseband DC voltage. Use Value: 1.5 pF CT avoids resonant detuning at 868 MHz; low IR (<1 nA at 25 V, 150 °C) maintains detector sensitivity. |
Use Scenario: Protecting analog inputs of precision ADCs (e.g., ADS1256) from overvoltage during industrial sensor hot-plug events. IC Role / Device Role / Timing Role: Back-to-back clamping diode limiting input swing to ±0.7 V beyond supply rails. Use Value: Dual-isolated structure permits symmetrical rail-to-rail clamping without leakage coupling between channels. |
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 |
|---|---|---|---|
| BAS16DW-7-F | Same SOT143 package, but 100 V VRRM and 6 ns tRR; VF = 0.89 V @ 10 mA. | Higher voltage margin suits 60 V industrial systems; slower recovery limits >50 MHz use. | Select when higher reverse standoff is prioritized over speed in non-RF applications. |
| MBR0520LSD-TP | Schottky architecture, 20 V VRRM, 0.3 V VF @ 1 mA, but single-diode SOD-123 package. | No dual isolation; lower VF benefits low-voltage rectification, but lacks differential clamping capability. | Choose only for single-path, low-VF, low-voltage (<20 V) rectification-not for dual-channel or high-speed roles. |
Compared with BAS16DW-7-F and MBR0520LSD-TP, the BAS28Q uniquely balances 85 V standoff, 4 ns speed, and dual isolation in SOT143-making it the only option among the three qualified for AEC-Q101 automotive signal protection.
Availability
BAS28Q is available at Aetrix Electronics and suitable for automotive CAN protection, RF detector front-ends, high-speed logic translation, and precision sensor input clamping requiring stable component supply across extended temperature ranges.
Supply support for BAS28Q 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, manufacturing, and sales operations across Asia, Europe, and North America.
The BAS28Q belongs to Diodes' automotive-qualified discrete diode product line, engineered specifically for high-reliability signal integrity and transient protection in vehicle networking and sensor interface subsystems.
FAQ
Is BAS28Q pin-compatible with BAS16DW?
Yes-both use SOT143 with identical pinout: Pin 1 = Anode 1, Pin 2 = Cathode 1, Pin 3 = Anode 2, Pin 4 = Cathode 2. However, BAS28Q offers faster tRR (4 ns vs. 6 ns) and lower VF at low currents, making it preferable for high-frequency designs where timing fidelity matters.
What is the maximum continuous forward current per diode?
The absolute maximum continuous forward current per diode is 215 mA at TA = +25 °C on a standard FR-4 board with 1" × 1" 2 oz copper pad. Derating applies above +25 °C per Figure 1, reaching zero dissipation at +150 °C ambient.
Does BAS28Q support bidirectional ESD protection?
No-it contains two unidirectional PN diodes. For bidirectional protection, external back-to-back configuration (e.g., anode-to-anode or cathode-to-cathode) is required. Its AEC-Q101 qualification validates robustness against IEC 61000-4-2 contact discharge when used in such layouts.
Can BAS28Q be used in place of a single SOT23 diode?
Yes, but only if the application requires only one diode and space allows SOT143's larger footprint. The BAS28Q's dual structure is not electrically wasteful-unused diode can be left unconnected-but SOT143 occupies ~2.5× the area of SOT23, so substitution should consider PCB real estate trade-offs.
BAS28Q-13 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-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143
BAS28Q-13 FAQ
1.How can I place an order for BAS28Q-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS28Q-13 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 BAS28Q-13 reliable?
The price and inventory of BAS28Q-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS28Q-13 is usually 5 days.
3.What payment methods are accepted for BAS28Q-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS28Q-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS28Q-13?
BAS28Q-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS28Q-13 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 BAS28Q-13?
For technical support, including BAS28Q-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS28Q-13 requirements.
6.How does Aetrix verify that BAS28Q-13 is sourced from the original manufacturer or authorized distributors?
All BAS28Q-13 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 BAS28Q-13 meets industry standards.
7.What is the process for return or replacement of BAS28Q-13?
All BAS28Q-13 units undergo pre-shipment inspection (PSI). If there is an issue with BAS28Q-13, 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 BAS28Q-13 part is unused and in its original packaging.
Return procedure for BAS28Q-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS28Q-13 Tags
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