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Taiwan Semiconductor Corporation S1AB M4G
- Part No.:
- S1AB M4G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
S1AB M4G.pdf
- Description:
- DIODE GEN PURP 50V 1A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,203
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Product details
Overview
S1AB M4G from Taiwan Semiconductor is a 1 A, 50 V standard surface-mount silicon rectifier diode in DO-214AA (SMB) package, featuring glass-passivated junction, 30 A surge capability, and 1.1 V max forward voltage at 1 A - used in AC/DC input stages of compact SMPS and LED lighting adapters.
For engineers reviewing the S1AB M4G datasheet, S1AB M4G pinout, S1AB M4G application, or S1AB M4G equivalent, key selection criteria include repetitive peak reverse voltage (50 V), thermal resistance (30 °C/W), moisture sensitivity level (J-STD-020 Level 1), RoHS/halogen-free compliance, and SMB footprint compatibility with automated placement.
Technical Context
The S1AB M4G is a single-die, unidirectional standard recovery rectifier optimized for low-loss, high-reliability operation in 50–60 Hz line-frequency and high-frequency switching applications up to 100 kHz. Its glass-passivated junction ensures stable leakage performance across temperature.
Thermal design relies on its 30 °C/W junction-to-lead resistance and 150 °C maximum junction temperature, enabling continuous 1 A conduction without forced cooling when mounted on ≥1 cm² copper area. Reverse leakage remains ≤5 µA at 25 °C and ≤50 µA at 125 °C under rated VR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Avg) | 1 A - supports continuous output current in 5–15 W offline SMPS and adapter front-end rectification |
| VRRM | 50 V - suitable for low-voltage DC bus inputs or secondary-side rectification in isolated converters |
| IFSM (8.3 ms) | 30 A - withstands inrush surges during cold-start of power supplies without degradation |
| VF @ 1 A, 25°C | ≤1.1 V - limits conduction loss to ≤1.1 W per diode, critical for thermally constrained SMB layouts |
| RθJL | 30 °C/W - enables direct thermal path to PCB copper; requires ≥0.5 cm² 2-oz copper pad for full rating |
| IR @ 50 V, 125°C | ≤50 µA - ensures minimal standby power loss in energy-efficient lighting and adapter designs |
| CJ @ 4 V, 1 MHz | 12 pF - low capacitance minimizes switching noise and EMI in high-frequency flyback topologies |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode-indicated band; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | AC input / transformer secondary connection point | Accepts alternating input; must be routed with adequate creepage for 50 V RMS systems |
| Cathode (Lead 2) | DC output / positive rail node | Delivers rectified unidirectional current; connects to bulk capacitor or downstream regulator |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of reverse leakage and breakdown voltage under humidity and thermal cycling |
| J-STD-020 Level 1 moisture sensitivity | Allows unlimited floor life before reflow; no baking required prior to assembly |
| UL 94V-0 molding compound | Meets flame-retardancy requirements for end equipment safety certifications (e.g., UL/EN 62368) |
| RoHS & halogen-free (IEC 61249-2-21) | Complies with global environmental directives and enables use in green electronics manufacturing |
| Automated placement compatible | Standard SMB footprint and lead geometry support high-speed pick-and-place at >20,000 CPH |
Applications
| LED Driver Input Rectification | USB-C Adapter Secondary Rectifier |
|---|---|
Use Scenario: Rectifying 12–24 V AC from toroidal transformer in constant-current LED drivers for commercial lighting. IC Role / Device Role / Timing Role: Standard recovery rectifier converting AC to pulsating DC prior to buck regulation. Use Value: 1.1 V VF minimizes heat rise in sealed fixtures; SMB package fits tight board spacing constraints. | Use Scenario: Output-side rectification in 20–30 W USB-C PD adapters using quasi-resonant flyback topology. IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated 5–20 V DC to USB-C port controller and load switches. Use Value: 30 A IFSM handles startup surges; 12 pF CJ reduces high-frequency ringing and EMI filter burden. |
| Industrial Sensor Power Supply | Low-Power IoT Gateway AC/DC Stage |
Use Scenario: Providing isolated 3.3 V bias supply for RS-485 transceivers and microcontrollers in factory-floor sensors. IC Role / Device Role / Timing Role: Primary rectifier in miniature 1–2 W flyback converter with integrated transformer. Use Value: 50 V VRRM matches typical 36 VAC transformer secondaries; Level 1 MSL simplifies manufacturing logistics. | Use Scenario: Front-end rectification in wall-powered smart home gateways requiring CE/UKCA certification. IC Role / Device Role / Timing Role: Line-frequency bridge leg component (used as half-bridge element in discrete full-wave configuration). Use Value: UL 94V-0 package meets enclosure flammability requirements; halogen-free composition supports RoHS-compliant BOMs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar standard rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor M1AB | Same DO-214AA package, identical 1 A / 50 V rating, but VF = 1.05 V typ (vs. 1.1 V max for S1AB M4G); RθJL = 28 °C/W | Slightly lower conduction loss; preferred where thermal margin is marginal | Select M1AB if optimizing for lowest possible VF in thermally dense layouts |
| Vishay VS-1A50 | DO-214AA package, 1 A / 50 V, VF = 1.1 V max, but IR = 10 µA max at 125°C (vs. 50 µA for S1AB M4G) | Better high-temp leakage control; suited for extended-temperature industrial environments | Select VS-1A50 where <10 µA leakage at 125°C is mandatory for low-standby-power designs |
Compared with M1AB and VS-1A50, the S1AB M4G offers balanced performance: tighter IR specification than M1AB at elevated temperature, and lower cost than VS-1A50 while maintaining J-STD-020 Level 1 handling and halogen-free compliance.
Availability
S1AB M4G is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting adapters, and industrial sensor power modules requiring stable component supply, consistent parametric performance, and full RoHS/halogen-free compliance.
Supply support for S1AB M4G 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, specializing in power rectifiers, TVS diodes, and MOSFETs for industrial and consumer applications.
The S1AB M4G belongs to TSC's S1x series of standard recovery rectifiers, designed specifically for cost-sensitive, high-volume AC/DC front-end and secondary-side rectification where reliability, manufacturability, and regulatory compliance are prioritized over ultra-fast recovery.
FAQ
What is the maximum junction temperature rating for the S1AB M4G?
The S1AB M4G has a maximum junction temperature (TJ MAX) of +150 °C, allowing operation in ambient temperatures up to +105 °C when properly mounted on ≥0.5 cm² of 2-oz copper. This rating supports use in enclosed LED drivers and industrial power modules without active cooling. The S1AB M4G must not exceed this limit during transient or steady-state conditions to ensure long-term reliability.
Is the S1AB M4G suitable for use in a full-wave bridge configuration?
Yes, the S1AB M4G can be used as one leg in a discrete full-wave bridge rectifier due to its 50 V VRRM, 30 A IFSM, and DO-214AA package symmetry. Four S1AB M4G devices provide a compact, cost-effective bridge solution for low-voltage AC inputs (e.g., ≤35 V RMS). The S1AB M4G's glass-passivated junction ensures consistent reverse blocking across all units in parallel or bridge arrangements.
Does the S1AB M4G require pre-baking before reflow soldering?
No, the S1AB M4G has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30 °C/60% RH and does not require baking prior to reflow. This simplifies SMT line logistics and eliminates risk of popcorning. The S1AB M4G's matte tin-plated leads also meet J-STD-002 for reliable solder wetting during standard lead-free reflow profiles.
What is the reverse leakage current of the S1AB M4G at elevated temperature?
At 125 °C and rated 50 V reverse voltage, the S1AB M4G exhibits a maximum reverse leakage current (IR) of 50 µA, measured under 30 ms pulse conditions. This value is confirmed in TSC's official electrical specifications table and supports low-standby-power designs in battery-backed or energy-harvesting systems where quiescent current matters. The S1AB M4G maintains this spec across production lots.
How does the S1AB M4G compare to Schottky rectifiers in 50 V applications?
The S1AB M4G is a standard silicon rectifier, not a Schottky device, so it has higher VF (~1.1 V) but negligible reverse recovery charge and zero soft-recovery-related EMI. Unlike Schottky alternatives, the S1AB M4G sustains 150 °C junction temperature and shows no thermal runaway risk. For 50 V applications where efficiency is secondary to ruggedness and cost, the S1AB M4G delivers superior reliability. The S1AB M4G is not a drop-in replacement for Schottky diodes due to different switching behavior.
S1AB M4G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 5 µA @ 50 V
- Capacitance @ Vr, F:
- 12pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
S1AB M4G FAQ
1.How can I place an order for S1AB M4G through Aetrix?
Please submit a Request for Quotation (RFQ) for S1AB M4G 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 S1AB M4G reliable?
The price and inventory of S1AB M4G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1AB M4G is usually 5 days.
3.What payment methods are accepted for S1AB M4G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1AB M4G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S1AB M4G?
S1AB M4G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S1AB M4G 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 S1AB M4G?
For technical support, including S1AB M4G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1AB M4G requirements.
6.How does Aetrix verify that S1AB M4G is sourced from the original manufacturer or authorized distributors?
All S1AB M4G 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 S1AB M4G meets industry standards.
7.What is the process for return or replacement of S1AB M4G?
All S1AB M4G units undergo pre-shipment inspection (PSI). If there is an issue with S1AB M4G, 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 S1AB M4G part is unused and in its original packaging.
Return procedure for S1AB M4G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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