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STMicroelectronics BAT30KFILM
- Part No.:
- BAT30KFILM
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
BAT30KFILM.pdf
- Description:
- DIODE SCHOTTKY 30V 300MA SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:111,334
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Product details
Overview
BAT30KFILM from STMicroelectronics is a single 30 V, 300 mA surface-mount Schottky diode in SOD-523 package, featuring 14 pF typical junction capacitance at VR = 1 V, 0.5 µA reverse leakage at 5 V/25 °C, and forward voltage of 430 mV at 30 mA/25 °C - optimized for high-frequency switching in DC-DC converters and RF detector circuits.
For engineers reviewing the BAT30KFILM datasheet, BAT30KFILM pinout, BAT30KFILM application, or BAT30KFILM equivalent, key selection criteria include low VF for efficiency-critical bias networks, ultra-low Cj for RF envelope detection, thermal resistance of 600 °C/W (SOD-523), and RoHS/ECOPACK®2 compliance for consumer-grade PCB assembly.
Technical Context
The BAT30KFILM implements a planar Schottky barrier structure with platinum-silicide contact, enabling negligible minority-carrier storage and sub-nanosecond reverse recovery. Its low junction capacitance (14 pF typ. @ 1 V) and fast switching are achieved via minimized active area and shallow epitaxial layer design.
Thermal performance is defined by epoxy PCB mounting per JEDEC standards: Rth(j-a) = 600 °C/W for SOD-523, limiting continuous power dissipation to 200 mW at Tamb = 25 °C. The device operates up to Tj = 150 °C with storage range from –65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - supports input rails up to 24 V nominal in buck converter freewheeling paths |
| IF (cont) | 300 mA - suitable for low-power signal rectification and clamp protection in portable electronics |
| VF @ 30 mA | 430 mV - reduces conduction loss by >40% vs. standard silicon diodes in 3.3 V logic-level clamping |
| Cj @ 1 V | 14 pF - enables operation up to 2.4 GHz in RF detector front-ends without resonance degradation |
| IR @ 5 V | 0.5 µA - ensures minimal standby current leakage in battery-backed real-time clock backup circuits |
| Rth(j-a) | 600 °C/W - requires thermal pad layout per ST's recommended footprint to maintain Tj < 125 °C at full IF |
Pinout & Package
SOD-523 package: ultra-compact 1.6 mm × 0.8 mm × 0.6 mm surface-mount outline with gull-wing leads; moisture sensitivity level (MSL) 1, lead-free, RoHS/ECOPACK®2 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry | Connected to higher-potential node in clamping or rectification path; marked by cathode band on opposite end |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Connected to reference (GND or lower rail); defines polarity-sensitive placement in ESD protection networks |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low forward voltage | 430 mV @ 30 mA enables >92% efficiency in 3.3 V synchronous rectifier auxiliary paths |
| Negligible reverse recovery time | No minority carrier storage eliminates switching tail current in >10 MHz PWM applications |
| Low junction capacitance | 14 pF @ 1 V allows direct integration into 2.4 GHz ISM-band RF detector inputs without matching network |
| SOD-523 footprint | 0.8 mm pitch, 1.45 mg mass - compatible with high-density mobile PCB reflow and automated optical inspection |
Applications
| DC-DC Converter Freewheeling Diode | RF Signal Envelope Detector |
|---|---|
Use Scenario: High-frequency buck converter (1–3 MHz) in wearables requiring minimal BOM count and thermal footprint. IC Role / Device Role / Timing Role: Freewheeling diode conducting during low-side switch off-time; handles 300 mA peak inductor current. Use Value: 430 mV VF reduces conduction loss by 180 mW vs. 610 mV Si diode, lowering thermal load on 2 mm² PCB copper area. | Use Scenario: 2.4 GHz Wi-Fi receiver front-end detecting RF envelope for RSSI measurement. IC Role / Device Role / Timing Role: Passive demodulator converting RF amplitude to baseband DC voltage; operates without bias supply. Use Value: 14 pF Cj minimizes detuning of matching network, preserving >–3 dB bandwidth across 2.4–2.5 GHz band. |
| Logic-Level Clamping Diode | Low-Power Backup Supply Clamp |
Use Scenario: Protecting 1.8 V/3.3 V I/O pins against ESD transients in IoT sensor nodes. IC Role / Device Role / Timing Role: Bidirectional clamp limiting voltage swing to ±0.3 V beyond rail; activated within <1 ns. Use Value: 0.5 µA IR at 5 V prevents >10 nA leakage-induced drift in precision ADC reference buffers. | Use Scenario: Maintaining RTC backup voltage during main supply brownout in smart meters. IC Role / Device Role / Timing Role: Reverse-blocking diode isolating coin-cell from main VDD; conducts only during power failure. Use Value: 150 °C max Tj rating ensures reliability under sealed enclosure thermal stress (85 °C ambient + 40 °C self-heat). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSR0330P2T5G | Same SOD-523 package; VF = 450 mV @ 30 mA; Cj = 12 pF @ 1 V; IR = 1 µA @ 5 V | Higher IR increases standby leakage in battery-backed systems | Prefer for RF detector use where lower Cj outweighs leakage penalty |
| RB520S-30T2R | SOD-523; VF = 370 mV @ 30 mA; Cj = 20 pF @ 1 V; IR = 0.3 µA @ 5 V | Higher Cj degrades high-frequency impedance matching above 1 GHz | Prefer for low-VF priority in DC-DC freewheeling where RF performance is irrelevant |
Compared with NSR0320P2T5G and RB520S-30T2R, BAT30KFILM offers the best balance of low VF (430 mV), moderate Cj (14 pF), and ultra-low IR (0.5 µA), making it optimal for mixed-signal applications demanding both efficiency and RF integrity.
Availability
BAT30KFILM is available at Aetrix Electronics and suitable for DC-DC converter freewheeling, RF envelope detection, and logic-level clamping applications requiring stable component supply and long-term industrial lifecycle support.
Supply support for BAT30KFILM 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.
The BAT30 series belongs to ST's small-signal Schottky diode product line, engineered specifically for high-efficiency, high-frequency switching in space-constrained portable and wireless applications.
FAQ
What is the maximum junction temperature and how does it affect PCB layout?
The BAT30KFILM has a maximum junction temperature of 150 °C. To maintain safe operation at full 300 mA current, ST specifies a thermal resistance of 600 °C/W for the SOD-523 package on an epoxy PCB with recommended pad layout. This requires minimum 10 mm² copper pour connected to both terminals and strict adherence to the footprint dimensions in Table 6 - undersized pads increase Rth(j-a) and risk thermal runaway.
Is BAT30KFILM suitable for reverse polarity protection in 5 V USB-powered devices?
No - BAT30KFILM is rated for VRRM = 30 V but its IF = 300 mA continuous rating and 200 mW power dissipation limit it to low-current paths. For 5 V reverse polarity protection handling >500 mA, a higher-current Schottky like STPS0530Z (IF = 3 A) in SOD-123 is required. BAT30KFILM is intended for signal-level clamping, not power rail protection.
Does BAT30KFILM have a cathode band marking, and how is polarity verified on the SOD-523 package?
Yes - BAT30KFILM uses standard SOD-523 polarity marking: a visible cathode band is printed on the package body adjacent to Pin 2 (cathode). Pin 1 (anode) is the opposite end. Visual inspection under 10× magnification confirms orientation; ST's Figure 11 shows the band position aligned with the "E" dimension edge. No laser marking or dot coding is used.
How does the 14 pF junction capacitance impact performance in 2.4 GHz ISM-band applications?
At 2.4 GHz, the 14 pF Cj yields a capacitive reactance of ~4.7 Ω, which is low enough to avoid significant detuning of λ/4 matching stubs or shunt LC networks. Measured data in Figure 7 shows Cj drops to 6 pF at VR = 10 V, further improving high-frequency isolation - making BAT30KFILM effective for envelope detection without requiring external compensation components.
BAT30KFILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 300mA
- Voltage - Forward (Vf) (Max) @ If:
- 530 mV @ 300 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 30 V
- Capacitance @ Vr, F:
- 22pF @ 0V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
- Operating Temperature - Junction:
- 150°C (Max)
BAT30KFILM FAQ
1.How can I place an order for BAT30KFILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAT30KFILM 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 BAT30KFILM reliable?
The price and inventory of BAT30KFILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAT30KFILM is usually 5 days.
3.What payment methods are accepted for BAT30KFILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAT30KFILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAT30KFILM?
BAT30KFILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAT30KFILM 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 BAT30KFILM?
For technical support, including BAT30KFILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAT30KFILM requirements.
6.How does Aetrix verify that BAT30KFILM is sourced from the original manufacturer or authorized distributors?
All BAT30KFILM 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 BAT30KFILM meets industry standards.
7.What is the process for return or replacement of BAT30KFILM?
All BAT30KFILM units undergo pre-shipment inspection (PSI). If there is an issue with BAT30KFILM, 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 BAT30KFILM part is unused and in its original packaging.
Return procedure for BAT30KFILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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