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Taiwan Semiconductor Corporation S1MBH
- Part No.:
- S1MBH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
S1MBH.pdf
- Description:
- DIODE GEN PURP 1A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:11,632
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Product details
Overview
S1MBH from Taiwan Semiconductor is a surface-mount silicon rectifier diode rated for 1000 V repetitive peak reverse voltage (VRRM), 1 A average forward current (IF), and 30 A non-repetitive surge current (IFSM), with a maximum forward voltage of 1.1 V at 1 A and 25°C - used as a freewheeling or snubber diode in automotive DC-DC converters and lighting systems.
For engineers reviewing the S1MBH datasheet, S1MBH pinout, S1MBH application, or S1MBH equivalent, key selection criteria include its DO-214AA (SMB) package, AEC-Q101 qualification, glass-passivated junction, 150°C max junction temperature, and low leakage (5 µA @ 25°C, 50 µA @ 125°C).
Technical Context
The S1MBH is a single-die, unidirectional silicon rectifier optimized for high-voltage, medium-current switching applications. Its glass-passivated junction ensures stable reverse characteristics and robustness against moisture and mechanical stress, while the DO-214AA (SMB) package supports automated placement and meets J-STD-020 Level 1 moisture sensitivity.
Thermally, it delivers a junction-to-lead thermal resistance (RθJL) of 30°C/W and operates across –55°C to +150°C junction temperature range. Its 12 pF junction capacitance at 1 MHz and 4 V reverse bias enables predictable high-frequency behavior in snubber and flyback circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 1000 V - supports primary-side rectification in 800 V-class AC/DC or high-voltage DC-DC designs |
| IF | 1 A continuous - suitable for low-to-medium power freewheeling paths in automotive LED drivers |
| IFSM | 30 A (8.3 ms half-sine) - withstands inrush and transient surges without failure |
| VF | ≤1.1 V @ 1 A, 25°C - minimizes conduction loss and thermal rise in compact layouts |
| IR | ≤5 µA @ 25°C, ≤50 µA @ 125°C - ensures low standby leakage in battery-sensitive systems |
| TJ max | +150°C - enables operation in under-hood automotive environments without derating |
| CJ | 12 pF @ 1 MHz, 4 V - defines high-frequency impedance for snubber network tuning |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode indicated by band, matte tin-plated leads, UL 94V-0 molding compound, 0.090 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential node (e.g., switch node in buck converter) |
| Cathode | Current exit terminal during forward conduction; polarity marker via band | Connected to higher-potential rail (e.g., output capacitor positive in flyback) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass-passivated junction | Eliminates risk of junction corrosion and leakage drift in humid or chemically aggressive environments |
| Low VF (≤1.1 V) | Reduces power dissipation by ~15% vs. comparable 1A diodes with VF ≥1.25 V at same current |
| Junction capacitance = 12 pF | Enables precise RC snubber design with minimal parasitic oscillation in 100–500 kHz switching topologies |
| Moisture sensitivity level 1 | Allows unlimited floor life before reflow; no baking required prior to assembly |
Applications
| Automotive DC-DC Converters | LED Headlamp Drivers |
|---|---|
Use Scenario: High-efficiency 12 V to 48 V bidirectional DC-DC conversion in 48 V mild-hybrid architectures. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectifier stage or asynchronous boost/flyback secondary side. Use Value: 1000 V VRRM margin accommodates voltage spikes up to 1.2× bus voltage; 30 A IFSM handles load dump transients. | Use Scenario: Constant-current LED driver for adaptive front lighting systems (AFS) with PWM dimming. IC Role / Device Role / Timing Role: Snubber diode across MOSFET switch to clamp inductive kickback and suppress EMI. Use Value: 12 pF CJ and low IR ensure minimal capacitive loading on gate drive and stable turn-off behavior. |
| Industrial Snubber Networks | Freewheeling in Relay/Actuator Drivers |
Use Scenario: RC snubber across IGBTs in motor drives operating at 20–100 kHz switching frequencies. IC Role / Device Role / Timing Role: Voltage-clamping diode in RCD snubber circuit to absorb stored inductive energy. Use Value: Glass-passivated junction maintains consistent VF and IR over 10+ years of thermal cycling in factory automation equipment. | Use Scenario: Inductive load suppression for 24 V solenoid valves and contactor coils in PLC I/O modules. IC Role / Device Role / Timing Role: Freewheeling path for coil current decay when driving transistor turns off. Use Value: 150°C TJ max allows uninterrupted operation in sealed enclosures with ambient up to 85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06 | 600 V VRRM, 1.05 V VF @ 1 A, TO-277 package (smaller footprint than SMB) | Limited to ≤600 V systems; not AEC-Q101 qualified | Prefer where space is constrained and automotive qualification is not required |
| ES1J | 600 V VRRM, 1.7 A IF, same DO-214AA package, but only JEDEC-qualified (not AEC-Q101) | Higher current rating but lower voltage margin; lacks automotive stress validation | Acceptable for industrial power supplies where 1000 V margin is unnecessary |
Compared with STTH1R06 and ES1J, the S1MBH uniquely combines 1000 V rating, AEC-Q101 qualification, and SMB packaging - making it the only option among the three validated for under-hood automotive snubbing and freewheeling where both voltage headroom and reliability certification are mandatory.
Availability
S1MBH is available at Aetrix Electronics and suitable for automotive DC-DC converters, LED headlamp drivers, and industrial snubber networks requiring stable component supply across extended production lifecycles.
Supply support for S1MBH 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 automotive, industrial, and consumer markets since 1979.
The S1MBH belongs to TSC's AEC-Q101-qualified SMB rectifier family, designed specifically for high-reliability, high-voltage switching applications in harsh-environment automotive and industrial power systems.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) rating for the S1MBH?
The S1MBH has a VRRM rating of 1000 V, confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version A2102). This rating defines the highest instantaneous reverse voltage the device can block repeatedly without breakdown, making S1MBH suitable for 800 V nominal bus systems with safety margin. It is the highest voltage grade in the S1xBH series.
Is the S1MBH qualified for automotive applications?
Yes, the S1MBH is explicitly AEC-Q101 qualified per the manufacturer's documentation. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and unbiased highly accelerated stress testing (uHAST), validating S1MBH for use in automotive powertrain and body electronics where reliability under thermal and environmental stress is critical.
What package type does the S1MBH use, and what are its key mechanical features?
The S1MBH uses the DO-214AA (SMB) surface-mount package. Key mechanical features include matte tin-plated leads compliant with J-STD-002, UL 94V-0 flammability-rated molding compound, polarity indicated by cathode band, and JESD201 Class 2 whisker resistance. Its weight is approximately 0.090 g, and it meets moisture sensitivity level 1 per J-STD-020.
What is the forward voltage drop (VF) specification for the S1MBH at rated current?
The S1MBH has a maximum forward voltage drop of 1.1 V at 1 A forward current and 25°C junction temperature, as specified in the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) to minimize self-heating. At higher temperatures or continuous DC, VF decreases slightly due to negative temperature coefficient of silicon diodes.
Does the S1MBH have a specified junction-to-lead thermal resistance (RθJL)?
Yes, the S1MBH has a typical junction-to-lead thermal resistance (RθJL) of 30°C/W, published in the Thermal Performance section of the datasheet. This parameter enables accurate thermal modeling when the device is soldered to a PCB with adequate copper pour, allowing designers to estimate junction temperature rise above lead temperature under defined power dissipation conditions.
S1MBH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 1000 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 @ 1000 V
- Capacitance @ Vr, F:
- 12pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
- Operating Temperature - Junction:
- -55°C ~ 150°C
S1MBH FAQ
1.How can I place an order for S1MBH through Aetrix?
Please submit a Request for Quotation (RFQ) for S1MBH 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 S1MBH reliable?
The price and inventory of S1MBH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1MBH is usually 5 days.
3.What payment methods are accepted for S1MBH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1MBH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S1MBH?
S1MBH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S1MBH 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 S1MBH?
For technical support, including S1MBH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1MBH requirements.
6.How does Aetrix verify that S1MBH is sourced from the original manufacturer or authorized distributors?
All S1MBH 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 S1MBH meets industry standards.
7.What is the process for return or replacement of S1MBH?
All S1MBH units undergo pre-shipment inspection (PSI). If there is an issue with S1MBH, 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 S1MBH part is unused and in its original packaging.
Return procedure for S1MBH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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