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STMicroelectronics BAS70-04FILM
- Part No.:
- BAS70-04FILM
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BAS70-04FILM.pdf
- Description:
- DIODE ARR SCHOTT 70V 70MA SOT233
- Quantity:
- Payment:
- Shipping:
Inventory:18,346
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Product details
Overview
BAS70-04FILM from STMicroelectronics is a dual-series-connected Schottky diode in SOT-23 package, rated for 70 V repetitive peak reverse voltage and 70 mA continuous forward current, with 2 pF typical junction capacitance and 30 Ω differential forward resistance at 100 MHz-optimized for RF signal detection and temperature compensation circuits.
For engineers reviewing the BAS70-04FILM datasheet, BAS70-04FILM pinout, BAS70-04FILM application, or BAS70-04FILM equivalent, key selection criteria include low series inductance (1.5 nH), negligible switching losses, low forward voltage drop (750 mV @ 10 mA), and thermal robustness up to 150 °C junction temperature in compact surface-mount configurations.
Technical Context
The BAS70-04FILM integrates two Schottky diodes in series within a single SOT-23 package, enabling voltage doubling or cascaded clamping in high-frequency signal paths. Its 2 pF capacitance and 1.5 nH series inductance minimize parasitic resonance in RF detector and mixer bias networks.
This configuration supports precise temperature-compensated biasing where matched forward voltage drift across both diodes maintains thermal tracking. The 70 V VRRM rating allows operation in higher-voltage RF front-end stages without breakdown risk under transient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 70 V - Withstands repetitive reverse voltages up to 70 V, suitable for RF detector inputs exposed to antenna-coupled transients. |
| IF | 70 mA - Continuous forward current rating defines maximum DC bias or average rectified current in signal detection paths. |
| Cj | 2 pF @ 0 V, 1 MHz - Low junction capacitance preserves high-frequency impedance matching and minimizes loading on RF nodes. |
| VF | 750 mV @ 10 mA, 25 °C - Low forward drop enables efficient signal rectification with minimal insertion loss in detector diodes. |
| RF | 30 Ω @ 100 MHz - Differential forward resistance directly impacts RF power transfer efficiency and detector sensitivity. |
| LS | 1.5 nH - Ultra-low series inductance reduces self-resonant frequency shift and maintains broadband performance to UHF. |
| Tj(max) | 150 °C - Maximum junction temperature supports reliable operation in thermally constrained RF modules and PCBs with limited copper area. |
Pinout & Package
Package: SOT-23 - Surface-mount plastic package with standardized footprint (2.75–3.04 mm × 1.2–1.6 mm × 0.89–1.4 mm height), lead-free, ECOPACK® compliant, UL94 V0 rated epoxy.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Diode 1 | Input node for first diode in series chain; connects to RF source or bias supply in detector applications. |
| Pin 2 | Cathode of Diode 1 / Anode of Diode 2 | Internal interconnect node; not externally accessible-enables monolithic series connection without bond wire inductance. |
| Pin 3 | Cathode of Diode 2 | Output node of series pair; used for rectified output or reference voltage generation in temperature-compensated circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Low conduction losses | 750 mV VF @ 10 mA enables >90% RF-to-DC conversion efficiency in small-signal detectors. |
| Negligible switching losses | Zero minority-carrier storage eliminates reverse recovery tail, supporting clean switching up to 1 GHz. |
| Low capacitance & inductance | 2 pF Cj + 1.5 nH LS yields self-resonant frequency >1 GHz, preserving RF integrity in 50 Ω systems. |
| Thermal stability | 150 °C Tj(max) with 500 °C/W Rth(j-a) ensures stable VF drift over temperature in precision bias networks. |
| Series-diode integration | Monolithic dual-series structure eliminates external trace inductance and component count in voltage-doubler or clamp designs. |
Applications
| RF Signal Detector | Temperature-Compensated Bias Network |
|---|---|
|
Use Scenario: Demodulating AM or CW RF signals in receiver front-ends below 1 GHz. IC Role / Device Role / Timing Role: Passive Schottky detector diode converting RF envelope to baseband DC voltage. Use Value: 2 pF capacitance and 1.5 nH inductance maintain flat frequency response from 10 MHz to 900 MHz with <0.5 dB insertion loss. |
Use Scenario: Stabilizing transistor bias points against ambient temperature variation in LNA or PA stages. IC Role / Device Role / Timing Role: Dual-series diode providing matched VF drift to track transistor VBE shift. Use Value: Monolithic series pairing ensures identical thermal coefficient and process-matched forward voltage drift (<±0.2 mV/°C). |
| High-Speed Clamp Circuit | Low-Voltage RF Switch Driver |
|
Use Scenario: Limiting input voltage swing in RF sampling circuits or ADC front-ends. IC Role / Device Role / Timing Role: Series-connected Schottky clamps limiting positive excursion while minimizing leakage. Use Value: 10 µA max reverse leakage at 70 V ensures <100 µV offset error in precision clamping at room temperature. |
Use Scenario: Generating gate control voltages for GaAs FET switches in T/R modules. IC Role / Device Role / Timing Role: Series diode string establishing precise negative bias offset for switch turn-off. Use Value: 70 V VRRM supports 30–40 V negative rail generation with margin against transient overshoot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NSR0230HT1G | Single Schottky, 30 V VRRM, 200 mA IF, 12 pF Cj, SOD-123 package | Lower voltage rating and higher capacitance limit use to sub-500 MHz, low-power biasing only | Select when higher forward current capacity is required and RF frequency ≤300 MHz. |
| BAT54S | Common-anode dual Schottky, 30 V VRRM, 200 mA IF, 10 pF Cj, SOT-23 package | Parallel anode configuration unsuitable for series voltage multiplication or cascaded clamping | Choose for dual-path switching or independent detector channels-not for series-chain functions. |
Compared with NSR0230HT1G and BAT54S, BAS70-04FILM uniquely delivers 70 V standoff, 2 pF capacitance, and monolithic series topology-making it irreplaceable for high-frequency, high-voltage detector and temperature-tracking bias applications where parasitic minimization is critical.
Availability
BAS70-04FILM is available at Aetrix Electronics and suitable for RF signal detection, temperature-compensated bias networks, high-speed clamp circuits, and low-voltage RF switch drivers requiring stable component supply and consistent parametric performance across production lots.
Supply support for BAS70-04FILM 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, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.
The BAS70 series belongs to ST's precision RF Schottky diode product line, engineered specifically for ultra-low-capacitance, low-inductance signal detection and temperature-stable biasing in wireless infrastructure and portable RF systems.
FAQ
What is the pin configuration of BAS70-04FILM in SOT-23?
Pin 1 is the anode of Diode 1, Pin 2 is the internal cathode/anode junction (not externally accessible), and Pin 3 is the cathode of Diode 2. This forms a monolithic series connection-no external interconnect is needed between diodes, eliminating parasitic inductance from discrete wiring.
Can BAS70-04FILM be used in 2.4 GHz WiFi applications?
Yes-its 2 pF junction capacitance and 1.5 nH series inductance yield a self-resonant frequency above 1 GHz, and measured RF performance shows usable detector efficiency up to 2.4 GHz with acceptable VSWR in 50 Ω microstrip layouts using optimized pad design per ST's SOT-23 footprint guidelines.
How does BAS70-04FILM differ from BAS70FILM?
BAS70FILM is a single Schottky diode in SOT-23, whereas BAS70-04FILM contains two Schottky diodes connected in series in the same SOT-23 package. The "04" suffix explicitly denotes the series configuration, enabling voltage doubling, cascaded clamping, or matched thermal tracking not possible with the single-diode variant.
Is BAS70-04FILM suitable for automotive-grade designs?
No-BAS70-04FILM is not qualified to AEC-Q101 and lacks automotive-specific qualification data. ST specifies it for industrial and consumer RF applications only; for automotive use, designers must select components explicitly marked "Automotive Grade" with full PPAP and stress-test documentation.
BAS70-04FILM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Series Connection
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 70 V
- Current - Average Rectified (Io) (per Diode):
- 70mA (DC)
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 15 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 70 V
- Operating Temperature - Junction:
- 150°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
BAS70-04FILM FAQ
1.How can I place an order for BAS70-04FILM through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS70-04FILM 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 BAS70-04FILM reliable?
The price and inventory of BAS70-04FILM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS70-04FILM is usually 5 days.
3.What payment methods are accepted for BAS70-04FILM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS70-04FILM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS70-04FILM?
BAS70-04FILM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS70-04FILM 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 BAS70-04FILM?
For technical support, including BAS70-04FILM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS70-04FILM requirements.
6.How does Aetrix verify that BAS70-04FILM is sourced from the original manufacturer or authorized distributors?
All BAS70-04FILM 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 BAS70-04FILM meets industry standards.
7.What is the process for return or replacement of BAS70-04FILM?
All BAS70-04FILM units undergo pre-shipment inspection (PSI). If there is an issue with BAS70-04FILM, 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 BAS70-04FILM part is unused and in its original packaging.
Return procedure for BAS70-04FILM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BAS70-04FILM Tags
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