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Nexperia USA Inc. BAT46WH-QX
- Part No.:
- BAT46WH-QX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Diodes
- Package:
- SOD-123F
- Datasheet:
-
BAT46WH-QX.pdf
- Description:
- BAT46WH-Q/SOD123F/TO-236AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,762
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Product details
Overview
BAT46WH-Q from Nexperia is a planar Schottky barrier diode with integrated guard ring for stress protection, designed for high-speed switching and reverse polarity protection in automotive electronics. It delivers 710–850 mV forward voltage at 250 mA, ≤4 µA reverse leakage at 75 V, and 5.9 ns reverse recovery time in a compact SOD123F package.
For engineers reviewing the BAT46WH-Q datasheet, BAT46WH-Q pinout, BAT46WH-Q application, or BAT46WH-Q equivalent, this component is selected for low-loss clamping, fast transient response, AEC-Q101-qualified reliability, and space-constrained PCB layouts requiring <1.1 mm height and thermal resistance as low as 25 K/W to solder point.
Technical Context
This Schottky diode uses a planar silicon structure with an integrated guard ring to enhance ruggedness against electrical overstress and ESD transients-critical for automotive power rail protection. Its low junction capacitance (39 pF at 0 V) and sub-6 ns trr support >100 MHz switching in line termination and flyback snubbing.
The device operates across –55 °C to +150 °C ambient, with junction temperature limited to 150 °C. Thermal performance is specified for two mounting conditions: standard FR4 footprint (Rth(j-a) = 285 K/W) and enhanced cathode pad (Rth(j-sp) = 25 K/W), enabling precise thermal design in engine control units and ADAS modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Voltage (VR) | 100 V maximum - supports 48 V automotive systems with 2× safety margin against load dump spikes. |
| Forward Voltage (VF) | 710–850 mV at 250 mA - minimizes conduction loss in reverse polarity protection circuits. |
| Reverse Recovery Time (trr) | 5.9 ns typical - enables clean switching in >50 MHz signal line termination without ringing. |
| Reverse Leakage (IR) | 1–4 µA at 75 V, 25 °C - ensures low standby power in always-on vehicle networks. |
| Junction Capacitance (Cd) | 39 pF at 0 V - preserves signal integrity in high-speed data lines and CAN FD stubs. |
| Thermal Resistance (Rth(j-sp)) | 25 K/W - allows 780 mW power dissipation with only 1 cm² cathode copper pad on FR4. |
| AEC-Q101 Qualified | Stress-tested per automotive discrete semiconductor standard - validated for under-hood deployment. |
Pinout & Package
Encapsulated in the SOD123F surface-mount plastic package (2.6 × 1.6 × 1.1 mm), featuring flat leads and a marking bar indicating the cathode. The package complies with JEDEC MO-203 and supports reflow soldering per IPC-J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Marked side) | Cathode (K) | Connected to system ground or lower-potential rail; carries return current during forward conduction and blocks reverse voltage. |
| 2 | Anode (A) | Connected to input power or signal source; accepts forward bias and defines clamping reference point. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated guard ring | Prevents edge breakdown under high dv/dt or ESD stress-improves robustness in 12 V/48 V battery interfaces. |
| Low VF at high IF | Sub-850 mV drop at 250 mA enables efficient reverse polarity protection without significant voltage loss. |
| Small SOD123F footprint | 2.6 mm × 1.6 mm area saves board space versus SMA/SMB packages-ideal for dense ADAS sensor modules. |
| Low trr + low Cd synergy | 5.9 ns recovery and 39 pF capacitance jointly suppress overshoot/ringing in high-frequency clamp applications. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, HTRB, and ESD testing-reduces qualification effort for Tier 1 suppliers. |
Applications
| High-Speed Switching | Line Termination |
|---|---|
Use Scenario: Fast-switching DC-DC converter freewheeling path in automotive infotainment power supplies. IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time; handles 250 mA peak current with minimal voltage drop and recovery delay. Use Value: Reduces switching losses by limiting VF-induced conduction loss and avoids shoot-through risk via 5.9 ns trr. | Use Scenario: RS-485 or CAN FD bus stub termination in body control modules. IC Role / Device Role / Timing Role: Low-capacitance clamping diode absorbing ESD transients while preserving signal edge fidelity. Use Value: 39 pF capacitance prevents signal degradation up to 2 Mbps; guard ring withstands ±8 kV contact discharge. |
| Voltage Clamping | Reverse Polarity Protection |
Use Scenario: Input rail overvoltage suppression in telematics gateway ECUs exposed to 12 V battery transients. IC Role / Device Role / Timing Role: Shunt clamp diode activated during load dump events (>35 V), diverting surge current away from downstream regulators. Use Value: 100 V VR rating provides headroom above ISO 7637-2 Pulse 5a (up to 60 V); 2.5 A IFSM handles short-duration surges. | Use Scenario: Reverse battery connection protection in parking camera power inputs. IC Role / Device Role / Timing Role: Series-connected anode-to-input diode blocking reverse current flow when battery terminals are swapped. Use Value: 710 mV VF ensures <2% voltage drop at 250 mA-preserves operating margin for 3.3 V camera modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS2L25Q | 2 A IF rating, TO-277 package (larger, higher Rth(j-a)), VF = 450 mV @ 2 A | Better for higher-current (>500 mA) reverse protection; less suitable for space-constrained SMD layouts | Select when average forward current exceeds 300 mA and board area permits TO-277 footprint |
| ON Semi NSR0230P2T5G | SOD-123 package (no flat leads), VF = 450 mV @ 200 mA, IR = 10 µA @ 25 V | Lower VF but lower VR (30 V) and no AEC-Q101 qualification-limited to non-automotive consumer use | Select for cost-sensitive non-automotive applications where 30 V VR suffices and AEC-Q101 is not required |
Compared with STPS2L25Q and NSR0230P2T5G, BAT46WH-Q uniquely balances AEC-Q101 compliance, 100 V VR, SOD123F compactness, and sub-850 mV VF-making it optimal for space-limited, high-reliability automotive signal/power rail protection.
Availability
BAT46WH-Q is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS sensor modules, and body control units requiring stable component supply, long-term lifecycle assurance, and AEC-Q101-qualified performance.
Supply support for BAT46WH-Q 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 high-volume, high-reliability essential semiconductors-including logic, discretes, MOSFETs, and ESD protection devices.
The BAT46WH-Q belongs to Nexperia's AEC-Q101-qualified Schottky diode product line, engineered specifically for automotive power management, signal integrity, and transient protection in harsh environments.
FAQ
What is the maximum continuous forward current for BAT46WH-Q?
The maximum continuous forward current is 250 mA at Tamb ≤ 25 °C with standard FR4 mounting. Derating applies above 25 °C: at 85 °C ambient, max IF(AV) drops to ~180 mA (per Fig. 7). This rating assumes DC operation (duty cycle δ = 1) and accounts for thermal limits of the SOD123F package.
Does BAT46WH-Q support reflow soldering, and what profile is recommended?
Yes, BAT46WH-Q is qualified for lead-free reflow soldering per IPC-J-STD-020. The recommended profile uses peak temperature ≤ 260 °C, time above 217 °C ≤ 60 seconds, and ramp rate ≤ 3 °C/s. Figure 13 provides the exact solder land pattern (2.9 × 1.6 mm occupied area) for reliable joint formation.
How does the guard ring improve reliability in automotive applications?
The integrated guard ring mitigates electric field crowding at the silicon periphery, preventing premature avalanche breakdown during high dv/dt transients (e.g., load dump, ISO 7637-2 pulses). This extends operational lifetime under repeated stress and improves ESD robustness-validated per AEC-Q101 HBM (≥2 kV) and CDM (≥1 kV) tests.
Can BAT46WH-Q replace BAT54 series diodes in existing designs?
No-BAT46WH-Q has higher VR (100 V vs. 30 V), higher VF (~710 mV vs. ~350 mV at 10 mA), and different thermal characteristics. While both are SOD123F-packaged Schottkys, substituting requires verifying reverse voltage margin, forward loss impact on efficiency, and thermal performance under actual operating conditions.
BAT46WH-QX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- SOD-123F
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 250mA
- Voltage - Forward (Vf) (Max) @ If:
- 850 mV @ 250 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 5.9 ns
- Current - Reverse Leakage @ Vr:
- 9 µA @ 100 V
- Capacitance @ Vr, F:
- 39pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123F
- Operating Temperature - Junction:
- 150°C
BAT46WH-QX FAQ
1.How can I place an order for BAT46WH-QX through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT46WH-QX 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 BAT46WH-QX reliable?
The price and inventory of BAT46WH-QX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT46WH-QX is usually 5 days.
3.What payment methods are accepted for BAT46WH-QX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT46WH-QX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT46WH-QX?
BAT46WH-QX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT46WH-QX 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 BAT46WH-QX?
For technical support, including BAT46WH-QX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT46WH-QX requirements.
6.How does Aetrix verify that BAT46WH-QX is sourced from the original manufacturer or authorized distributors?
All BAT46WH-QX 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 BAT46WH-QX meets industry standards.
7.What is the process for return or replacement of BAT46WH-QX?
All BAT46WH-QX units undergo pre-shipment inspection (PSI). If there is an issue with BAT46WH-QX, 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 BAT46WH-QX part is unused and in its original packaging.
Return procedure for BAT46WH-QX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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