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Taiwan Semiconductor Corporation MMBD4148CA RFG
- Part No.:
- MMBD4148CA RFG
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBD4148CA RFG.pdf
- Description:
- DIODE ARRAY GP 100V 200MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:8,991
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Product details
Overview
MMBD4148CA RFG from Taiwan Semiconductor is a surface-mount silicon switching diode in SOT-23 package, rated for 200 mA forward current and 100 V repetitive peak reverse voltage, with 4 ns reverse recovery time and 0.82 V forward voltage at 10 mA - used in high-frequency DC/DC converter flyback snubbers and SMPS clamp circuits.
For engineers reviewing the MMBD4148CA RFG datasheet, MMBD4148CA RFG pinout, MMBD4148CA RFG application, or MMBD4148CA RFG equivalent, key selection criteria include reverse recovery time, junction capacitance (4 pF), thermal resistance (357 °C/W), moisture sensitivity level (J-STD-020 Level 1), and RoHS/halogen-free compliance for automated reflow assembly.
Technical Context
This discrete switching diode employs planar epitaxial construction to achieve fast recovery (trr ≤ 4 ns) and low junction capacitance (CJ ≤ 4 pF at 0 V), enabling efficient operation in >1 MHz switching topologies. Its 150 °C maximum junction temperature and JESD201 Class 1A whisker resistance support reliability in thermally constrained industrial power stages.
The device operates as a single anode-cathode junction in SOT-23 package with matte tin-plated leads solderable per J-STD-002. It is not a dual-diode or logic-level device - all electrical specs apply per diode, with no integrated biasing or protection circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Forward Current (IF) | 200 mA continuous - supports compact SMPS output rectification without forced air cooling |
| Repetitive Peak Reverse Voltage (VRRM) | 100 V - suitable for 48 V bus clamp and 24 V flyback secondary-side snubbing |
| Reverse Recovery Time (trr) | 4 ns - enables stable operation in 1–3 MHz DC/DC converters with minimal switching loss |
| Junction Capacitance (CJ) | 4 pF at 0 V - reduces high-frequency coupling noise in gate-drive and feedback paths |
| Forward Voltage (VF) | 0.82 V at 10 mA - lowers conduction loss in low-current bias and signal-clamp applications |
| Junction-to-Ambient Thermal Resistance (RθJA) | 357 °C/W - requires PCB copper area ≥ 25 mm² for full 200 mA rating at TA = 70 °C |
Pinout & Package
SOT-23 plastic surface-mount package with gull-wing leads; case meets UL 94 V-0; marking code "A1" on top surface; moisture sensitivity level 1 (MSL-1), unlimited floor life.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to higher-potential node during forward conduction; primary current entry point |
| Pin 2 | Cathode | Connected to lower-potential node; carries full IF during conduction; tied to ground or return path |
| Pin 3 | Collector / Heat Sink Pad (Not electrically connected) | Thermal pad only - internally isolated; must be soldered to PCB copper for thermal relief |
Key Features
| Feature | Design Value |
|---|---|
| Low reverse recovery time | 4 ns enables use in >1 MHz switching converters without excessive ringing or EMI |
| Low junction capacitance | 4 pF minimizes capacitive loading on high-speed control signals and gate drivers |
| Moisture sensitivity level 1 | No bake requirement before reflow - compatible with standard SMT line handling |
| RoHS and halogen-free | Complies with IEC 61249-2-21 and EU RoHS - qualified for automotive and medical-adjacent systems |
Applications
| SMPS Clamp Circuit | LED Driver Flyback Snubber |
|---|---|
Use Scenario: Placed across transformer primary winding to suppress voltage spikes during MOSFET turn-off in offline flyback converters. IC Role / Device Role / Timing Role: Fast-recovery clamping diode absorbing leakage inductance energy. Use Value: 4 ns trr and 100 V VRRM prevent secondary breakdown while limiting peak clamp voltage to <120 V. | Use Scenario: Integrated into constant-current LED driver IC feedback loop to suppress transient overshoot during dimming transitions. IC Role / Device Role / Timing Role: Signal-level snubber protecting op-amp input from inductive kickback. Use Value: 4 pF CJ avoids phase shift in 100 kHz–1 MHz feedback paths; 0.82 V VF ensures minimal offset error. |
| On-board DC/DC Converter | Adapter Secondary Rectifier |
Use Scenario: Used as freewheeling diode in synchronous-buck-derived non-isolated converters powering FPGA core rails. IC Role / Device Role / Timing Role: High-speed unidirectional current path during low-side switch off-time. Use Value: 200 mA IF rating supports 1.2 A peak inductor current with 6:1 duty cycle; 150 °C TJ max allows operation near SoC thermal zones. | Use Scenario: Secondary-side output rectifier in 5–12 V wall adapters with 20–30 W output. IC Role / Device Role / Timing Role: Low-loss rectifying element replacing Schottky where cost and leakage are prioritized over VF. Use Value: 25 nA IR at 20 V/25 °C reduces standby loss; 5 μA IR at 75 V enables 12 V output with 100 V derating margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4148W-7-F (Diodes Inc.) | VRRM = 100 V, trr = 4 ns, VF = 0.8 V @ 10 mA, SOD-123 package (larger footprint, higher RθJA) | Higher thermal resistance (420 °C/W) limits current in dense layouts; same MSL-1 but different land pattern | Prefer when legacy SOD-123 board space exists and thermal margin >15 °C is available |
| BAT54C-7-F (Diodes Inc.) | Dual common-cathode Schottky; VF = 0.33 V @ 10 mA but VRRM = 30 V and IR = 1 μA @ 25 V - not a drop-in replacement | Lower VF improves efficiency but insufficient reverse voltage for 48 V bus clamp or flyback snubbing | Select only for low-voltage (<24 V) signal steering or low-loss bias networks - not for power switching |
Compared with 1N4148W-7-F and BAT54C-7-F, the MMBD4148CA RFG delivers identical 100 V/4 ns performance in a smaller SOT-23 footprint with superior thermal dissipation (357 vs. 420 °C/W) and verified compatibility with high-density DC/DC converter layouts.
Availability
MMBD4148CA RFG is available at Aetrix Electronics and suitable for switching mode power supplies, onboard DC/DC converters, and lighting applications requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MMBD4148CA RFG 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving industrial, computing, and consumer markets since 1979.
The MMBD4148CA RFG belongs to TSC's general-purpose high-speed switching diode product line, designed specifically for cost-sensitive, high-volume power conversion and signal conditioning applications demanding reliability under reflow and extended temperature operation.
FAQ
What is the marking code for MMBD4148CA RFG on the SOT-23 package?
The MMBD4148CA RFG is laser-marked with "A1" on the top surface of the SOT-23 case. This distinguishes it from MMBD4148 (5D), MMBD4148CC (A4), and MMBD4148SE (A7). The marking is consistent across all Taiwan Semiconductor production lots and aligns with JEDS standard coding for discrete diodes.
Does MMBD4148CA RFG have a dual-diode configuration?
No, the MMBD4148CA RFG is a single silicon switching diode in SOT-23 package. It contains one anode-cathode junction. The "CA" suffix denotes a specific variant within the MMBD4148 family but does not indicate dual functionality - unlike MMBD4148SE (which is also single-junction) or BAT54-series dual Schottkys.
What is the maximum allowable forward surge current for MMBD4148CA RFG?
The MMBD4148CA RFG supports a non-repetitive peak forward surge current (IFSM) of 2 A for pulse width t = 1 μs, and 1 A for t = 1 s. These values are specified in the Absolute Maximum Ratings table and assume TJ ≤ 150 °C. Exceeding IFSM may cause permanent junction damage even if average IF remains within 200 mA.
Is MMBD4148CA RFG suitable for automotive applications?
The MMBD4148CA RFG is not AEC-Q200 qualified and is not recommended for safety-critical automotive functions. However, it is used in non-safety automotive subsystems such as infotainment power rails and body-control module DC/DC stages where ambient temperatures remain ≤ 105 °C and qualification to AEC standards is not mandated.
What is the reverse leakage current of MMBD4148CA RFG at elevated temperature?
At VR = 20 V and TA = 150 °C, the MMBD4148CA RFG exhibits a maximum reverse leakage current (IR) of 50 μA. This value is confirmed in the Electrical Specifications table and reflects worst-case behavior under sustained high-temperature bias - critical for standby power budgeting in thermally aggressive environments.
MMBD4148CA RFG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Anode
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io) (per Diode):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 10 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 4 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 75 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23
MMBD4148CA RFG FAQ
1.How can I place an order for MMBD4148CA RFG through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBD4148CA RFG 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 MMBD4148CA RFG reliable?
The price and inventory of MMBD4148CA RFG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBD4148CA RFG is usually 5 days.
3.What payment methods are accepted for MMBD4148CA RFG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBD4148CA RFG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBD4148CA RFG?
MMBD4148CA RFG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBD4148CA RFG 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 MMBD4148CA RFG?
For technical support, including MMBD4148CA RFG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBD4148CA RFG requirements.
6.How does Aetrix verify that MMBD4148CA RFG is sourced from the original manufacturer or authorized distributors?
All MMBD4148CA RFG 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 MMBD4148CA RFG meets industry standards.
7.What is the process for return or replacement of MMBD4148CA RFG?
All MMBD4148CA RFG units undergo pre-shipment inspection (PSI). If there is an issue with MMBD4148CA RFG, 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 MMBD4148CA RFG part is unused and in its original packaging.
Return procedure for MMBD4148CA RFG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBD4148CA RFG Tags
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