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Nexperia USA Inc. BAT721C-QR
- Part No.:
- BAT721C-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAT721C-QR.pdf
- Description:
- DIODE ARR SCHOTTKY 40V TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,408
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Product details
Overview
BAT721C-QR from Nexperia is a 40 V, 200 mA dual Schottky barrier diode in SOT23 package with common-cathode configuration, integrated guard ring for stress protection, low 550 mV forward voltage at 200 mA, and AEC-Q101 qualification for automotive use.
For engineers reviewing the BAT721C-QR datasheet, BAT721C-QR pinout, BAT721C-QR application, or BAT721C-QR equivalent, this device supports ultra-high-speed switching, reverse polarity protection, line termination, and voltage clamping in space-constrained automotive and industrial power management circuits.
Technical Context
This dual Schottky diode integrates two anodes (A1, A2) sharing a common cathode (K1/K2), enabling independent forward conduction paths with matched thermal and electrical characteristics. Its planar construction with guard ring enhances ESD and transient robustness beyond standard Schottky designs.
Rated for 40 V reverse voltage and 200 mA continuous forward current per diode, it delivers low 40–50 pF capacitance at 0 V and 1 MHz, supporting high-frequency signal integrity in clamping and termination roles without parasitic resonance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Voltage (VF) | 550 mV at IF = 200 mA - enables low-loss rectification and minimal voltage drop in power path protection. |
| Reverse Voltage (VR) | 40 V - supports 24 V automotive systems with margin against load dump transients. |
| Reverse Current (IR) | 15 µA at VR = 30 V, Tamb = 25 °C - ensures low leakage in standby and battery-sensitive applications. |
| Diode Capacitance (Cd) | 40–50 pF at VR = 0 V, f = 1 MHz - preserves signal edge integrity in high-speed data line termination. |
| Junction Temperature (Tj) | 125 °C max - allows operation in under-hood environments with sustained thermal stress. |
| AEC-Q101 Qualified | Stress-tested per automotive discrete semiconductor standard - validates reliability for production automotive ECUs. |
Pinout & Package
Encapsulated in a standard SOT23 plastic surface-mount package (2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm pin pitch), the BAT721C-QR features three terminals with defined anode/cathode mapping for dual-diode operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode of Diode 1 (A1) | Input node for first independent Schottky path; connects to protected source or signal line. |
| 2 | Anode of Diode 2 (A2) | Input node for second independent Schottky path; enables dual-rail or redundant protection. |
| 3 | Common Cathode (K1/K2) | Shared output node; simplifies PCB routing and reduces component count in dual-anode configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Low Forward Voltage | 550 mV @ 200 mA - minimizes conduction loss and self-heating in compact power rails. |
| Guard Ring Integration | Planar structure with integrated guard ring - improves ruggedness against ESD and voltage transients without external components. |
| Low Junction-to-Ambient Thermal Resistance | 500 K/W (FR4, single-sided copper) - enables passive thermal management in unheatsinked layouts. |
| Automotive Qualification | AEC-Q101 compliant - certified for use in automotive control modules, infotainment, and body electronics. |
Applications
| Automotive Reverse Polarity Protection | High-Speed Data Line Termination |
|---|---|
Use Scenario: Protecting 12 V/24 V vehicle ECUs from battery misconnection during service or assembly. IC Role / Device Role / Timing Role: Dual-anode Schottky clamp conducting only when polarity is inverted; common cathode ties to system ground. Use Value: Prevents fuse blowout and IC damage with <550 mV forward drop, eliminating need for series MOSFETs or relays. |
Use Scenario: Terminating RS-485, CAN FD, or USB 2.0 differential pairs on PCBs with tight layout constraints. IC Role / Device Role / Timing Role: Low-capacitance (40–50 pF) Schottky pair clamps overshoot/undershoot without distorting signal edges. Use Value: Maintains signal integrity up to 100 Mbps while occupying only one SOT23 footprint. |
| DC Power Rail Clamping | Redundant Supply OR'ing |
Use Scenario: Suppressing inductive kickback from solenoids or motors in ADAS actuators and HVAC controls. IC Role / Device Role / Timing Role: Fast-switching Schottky pair shunts transient energy to ground before voltage exceeds 40 V rating. Use Value: Limits peak voltage to safe levels with sub-nanosecond response and no recovery delay. |
Use Scenario: Combining two independent 5 V or 3.3 V supplies in automotive telematics units for fault-tolerant operation. IC Role / Device Role / Timing Role: Dual-anode configuration allows independent supply inputs feeding shared rail via common cathode. Use Value: Enables seamless switchover between sources with <550 mV forward loss and no external gate control logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSR20F40NXT5G | Same SOT23-3, 40 V/200 mA, but VF = 520 mV @ 200 mA; no AEC-Q101 qualification. | Not approved for automotive production; suitable for industrial/commercial grade only. | Select when AEC-Q101 is not required and lower VF is prioritized over qualification. |
| Vishay SS24-E3/57T | SOT23-3, 40 V/200 mA, VF = 500 mV @ 200 mA; AEC-Q101 qualified, but higher IR (25 µA @ 30 V). | Higher leakage may impact battery drain in always-on modules. | Prefer where lowest possible VF is critical and leakage tolerance >20 µA exists. |
Compared with NSR20F40NXT5G and SS24-E3/57T, BAT721C-QR uniquely balances AEC-Q101 compliance, 550 mV VF, and 15 µA IR - making it optimal for automotive power protection where qualification, efficiency, and standby leakage must all be simultaneously met.
Availability
BAT721C-QR is available at Aetrix Electronics and suitable for automotive reverse polarity protection, high-speed data line termination, and DC power rail clamping requiring stable component supply across production lifecycles.
Supply support for BAT721C-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 essential efficiency technologies, delivering high-performance, reliable discrete and logic devices for automotive, industrial, and consumer markets.
BAT721C-QR belongs to Nexperia's AEC-Q101-qualified Schottky diode product line, engineered specifically for robust, low-loss protection and signal conditioning in automotive power and interface subsystems.
FAQ
Is BAT721C-QR suitable for 48 V mild-hybrid automotive systems?
No. BAT721C-QR has a 40 V maximum reverse voltage rating, which provides insufficient margin against load dump transients in 48 V systems (which can exceed 60 V). It is rated for 12 V and 24 V automotive applications only, where its 40 V VR meets ISO 7637-2 pulse requirements with safety margin.
Can BAT721C-QR replace BAT54C in existing designs?
Yes, with verification. Both are SOT23-3 common-cathode dual Schottkys, but BAT721C-QR offers AEC-Q101 qualification, lower VF (550 mV vs. 600 mV typical), and tighter IR (15 µA vs. 20 µA). Layout compatibility is identical, but thermal performance and automotive compliance are improved.
What is the maximum pulsed forward current rating?
The non-repetitive peak forward current (IFSM) is 1 A for a half-sine wave pulse of ≤8.3 ms duration, per JEDEC test method, with initial junction temperature at 25 °C. This supports short-duration surge events like motor startup or capacitor charging without failure.
Does BAT721C-QR require derating above 25 °C ambient?
Yes. The 200 mA continuous forward current rating applies at Tamb = 25 °C. Above that, current must be reduced per the thermal resistance (Rth(j-a) = 500 K/W) and maximum Tj = 125 °C limit. At 85 °C ambient, maximum IF drops to approximately 120 mA to maintain safe junction temperature.
BAT721C-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
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io) (per Diode):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 200 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 15 µA @ 30 V
- Operating Temperature - Junction:
- 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
BAT721C-QR FAQ
1.How can I place an order for BAT721C-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT721C-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 BAT721C-QR reliable?
The price and inventory of BAT721C-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT721C-QR is usually 5 days.
3.What payment methods are accepted for BAT721C-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT721C-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT721C-QR?
BAT721C-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT721C-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 BAT721C-QR?
For technical support, including BAT721C-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT721C-QR requirements.
6.How does Aetrix verify that BAT721C-QR is sourced from the original manufacturer or authorized distributors?
All BAT721C-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 BAT721C-QR meets industry standards.
7.What is the process for return or replacement of BAT721C-QR?
All BAT721C-QR units undergo pre-shipment inspection (PSI). If there is an issue with BAT721C-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 BAT721C-QR part is unused and in its original packaging.
Return procedure for BAT721C-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAT721C-QR Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
-
MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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