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Nexperia USA Inc. BAT54-QR
- Part No.:
- BAT54-QR
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAT54-QR.pdf
- Description:
- DIODE SCHOTTKY 30V 200MA TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:55,568
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Product details
Overview
BAT54-QR from Nexperia is a planar Schottky barrier diode with integrated guard ring for stress protection, housed in an SOT23 (TO-236AB) surface-mount package. It delivers 30 V reverse voltage rating, 800 mV forward voltage at 100 mA, 2 µA reverse leakage at 25 V, 10 pF capacitance at 1 V, and 5 ns reverse recovery time - enabling ultra-high-speed switching in automotive power rail clamping and polarity protection circuits.
For engineers reviewing the BAT54-QR datasheet, BAT54-QR pinout, BAT54-QR application, or BAT54-QR equivalent, key selection criteria include its AEC-Q101 qualification, low VF/low Cd trade-off, SOT23 footprint compatibility, and validated performance under pulsed 25 °C thermal conditions per IEC 60134 limiting values.
Technical Context
The BAT54-QR implements a single-planar Schottky junction with guard ring structure to suppress edge breakdown and improve ruggedness under transient stress. Its low forward voltage arises from low-barrier-height metal-semiconductor contact, while sub-10 pF capacitance and 5 ns trr stem from minimized junction area and carrier lifetime control.
This discrete Schottky diode operates without minority-carrier storage, eliminating reverse recovery charge (Qrr ≈ 0), making it suitable for high-frequency (>10 MHz) line termination and flyback snubbing where conventional PN diodes introduce switching loss and ringing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 30 V - Maximum DC or repetitive peak reverse bias before breakdown; defines clamping headroom in 24 V automotive systems. |
| Forward Voltage (VF) | 800 mV @ 100 mA - Low conduction loss enables efficient reverse polarity protection with <80 mW dissipation at rated current. |
| Reverse Leakage (IR) | 2 µA @ 25 V - Enables stable voltage clamping in low-power standby modes without excessive quiescent drain. |
| Diode Capacitance (Cd) | 10 pF @ 1 V - Supports >100 MHz signal integrity in USB/PCIe line termination without signal distortion. |
| Reverse Recovery Time (trr) | 5 ns - Enables clean switching in >20 MHz DC-DC converter freewheeling paths with minimal EMI generation. |
| Junction Temperature (Tj) | 150 °C - Rated for under-hood automotive environments with sustained operation up to 125 °C ambient. |
| Power Dissipation (Ptot) | 250 mW @ Tamb ≤ 25 °C - Requires thermal pad or copper pour on FR4 PCB to sustain full 200 mA continuous forward current. |
Pinout & Package
Encapsulated in a standard SOT23 (TO-236AB) plastic surface-mount package measuring 2.9 mm × 1.3 mm × 1.0 mm with 1.9 mm lead pitch and tin-plated terminations compatible with reflow and wave soldering per IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Positive terminal for forward conduction; connects to supply rail or signal source in clamping configurations. |
| 2 | Not Connected (n.c.) | Internally isolated; must remain unconnected on PCB to avoid parasitic coupling or mechanical stress. |
| 3 | Cathode (K) | Negative terminal; ties to ground or return path in reverse polarity protection and voltage clamp topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring integration | Prevents edge breakdown under ESD or load dump transients, improving reliability in automotive 12 V/24 V systems. |
| AEC-Q101 qualification | Validated for automotive-grade temperature cycling, humidity, and mechanical shock per discrete semiconductor stress test standard. |
| Low forward voltage | Enables <100 mV dropout in reverse polarity protection, minimizing voltage loss across battery input stages. |
| Sub-10 pF capacitance | Preserves signal rise/fall times in high-speed data lines (e.g., CAN FD, LIN) without adding timing skew. |
| 5 ns reverse recovery | Eliminates tail current in switching regulators, reducing cross-conduction loss and MOSFET gate drive stress. |
Applications
| Automotive Reverse Polarity Protection | High-Speed Data Line Termination |
|---|---|
Use Scenario: Protecting infotainment head unit power inputs against incorrect battery connection during service. IC Role / Device Role / Timing Role: Unidirectional series blocking element placed between battery feed and system LDO input. Use Value: 800 mV VF limits voltage drop to <0.1 V at 100 mA, preserving LDO regulation margin while surviving 30 V load dump spikes. | Use Scenario: Terminating CAN FD bus stubs to suppress reflections at 5 Mbit/s signaling rates. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp to VCC or ground, absorbing line overshoot without distorting bit edges. Use Value: 10 pF Cd and 5 ns trr prevent signal integrity degradation beyond 100 MHz, maintaining eye diagram compliance. |
| DC-DC Converter Freewheeling Diode | ESD-Sensitive Signal Clamping |
Use Scenario: Freewheeling path in 2 MHz synchronous buck converter for ADAS camera module power supply. IC Role / Device Role / Timing Role: Fast-recovery path for inductor current during high-side FET off-time. Use Value: 5 ns trr avoids reverse recovery overlap with high-side switch turn-on, reducing shoot-through risk and switching loss. | Use Scenario: I/O protection for touch controller interface exposed to human-body-model ESD events. IC Role / Device Role / Timing Role: Low-leakage shunt clamp that activates below 30 V to divert ESD current away from IC pins. Use Value: 2 µA IR at 25 V ensures no measurable DC loading on 3.3 V logic lines, while 30 V VR withstands ±15 kV HBM discharges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NSS40201MR6T1G | Same SOT23-3 package; 40 V VR, 750 mV VF @ 100 mA, 15 pF Cd, AEC-Q101 qualified. | Higher VR supports 36 V industrial rails but higher Cd may limit >50 MHz signal use. | Select when 40 V headroom is required and capacitance sensitivity is secondary. |
| Vishay VS-2EDH02HM3/85A | SOD-123 package (not pin-compatible); 30 V VR, 550 mV VF @ 100 mA, 20 pF Cd, no AEC-Q101 claim. | Lower VF reduces conduction loss but larger package increases board area; lacks automotive qualification. | Select for cost-sensitive non-automotive designs where ultra-low VF outweighs qualification and size constraints. |
Compared with BAT54-QR, the NSS40201MR6T1G offers higher reverse voltage at minor capacitance cost, while the VS-2EDH02HM3/85A trades package compatibility and qualification for lower forward drop - making BAT54-QR optimal for space-constrained AEC-Q101-compliant automotive signal and power paths.
Availability
BAT54-QR is available at Aetrix Electronics and suitable for automotive reverse polarity protection, high-speed data line termination, and DC-DC converter freewheeling requiring stable component supply across production lifecycles.
Supply support for BAT54-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-enhancing components, delivering high-performance, reliable, and scalable solutions for automotive, industrial, and consumer markets.
The BAT54-QR belongs to Nexperia's AEC-Q101-qualified Schottky diode product line, engineered specifically for robust, low-loss protection and signal conditioning in harsh automotive electrical environments.
FAQ
Is BAT54-QR pin-compatible with BAT54C or BAT54S?
No. BAT54-QR is a single-diode variant in SOT23 with Pin 2 unconnected. BAT54C contains two common-cathode diodes, and BAT54S contains two series diodes - both use identical SOT23 footprints but differ internally. PCB layout must match the single-diode configuration and isolate Pin 2.
What is the maximum continuous forward current for BAT54-QR at 85 °C ambient?
At Tamb = 85 °C, derating applies: Ptot = 250 mW at 25 °C, with Rth(j-a) = 500 K/W. Junction temperature must stay ≤150 °C, allowing ~120 mA continuous IF before thermal shutdown. For sustained 200 mA operation, forced airflow or thermal vias are required.
Does BAT54-QR support bidirectional ESD protection?
No. As a unidirectional Schottky diode, BAT54-QR clamps only in one polarity (anode-to-cathode forward, cathode-to-anode reverse). For bidirectional ESD protection, a dual-rail TVS like PESD5V0S1BA must be used instead.
Can BAT54-QR replace a 1N5819 in an existing design?
Yes, with caveats: BAT54-QR offers lower VF (800 mV vs. ~900 mV), faster trr (5 ns vs. ~50 ns), and smaller SOT23 footprint versus DO-41. However, its 30 V VR is lower than 1N5819's 40 V, and its 200 mA IF rating is less than 1N5819's 1 A - verify voltage headroom and current demand before substitution.
BAT54-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
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 800 mV @ 100 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 2 µA @ 25 V
- Capacitance @ Vr, F:
- 10pF @ 1V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
- Operating Temperature - Junction:
- 150°C
BAT54-QR FAQ
1.How can I place an order for BAT54-QR through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT54-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 BAT54-QR reliable?
The price and inventory of BAT54-QR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT54-QR is usually 5 days.
3.What payment methods are accepted for BAT54-QR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT54-QR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT54-QR?
BAT54-QR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT54-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 BAT54-QR?
For technical support, including BAT54-QR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT54-QR requirements.
6.How does Aetrix verify that BAT54-QR is sourced from the original manufacturer or authorized distributors?
All BAT54-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 BAT54-QR meets industry standards.
7.What is the process for return or replacement of BAT54-QR?
All BAT54-QR units undergo pre-shipment inspection (PSI). If there is an issue with BAT54-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 BAT54-QR part is unused and in its original packaging.
Return procedure for BAT54-QR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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