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Taiwan Semiconductor Corporation S1KBH
- Part No.:
- S1KBH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
S1KBH.pdf
- Description:
- DIODE GEN PURP 800V 1A DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
S1KBH from Taiwan Semiconductor is a surface-mount silicon rectifier diode rated for 800 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 drop of 1.1 V at 1 A and 25°C - used in automotive freewheeling and DC-DC converter snubber circuits.
For engineers reviewing the S1KBH datasheet, S1KBH pinout, S1KBH application, or S1KBH equivalent, key selection criteria include its AEC-Q101 qualification, DO-214AA (SMB) package compatibility, 150°C junction temperature rating, low leakage (≤5 µA at 25°C), and glass-passivated junction for reliability in harsh environments.
Technical Context
The S1KBH is a single-die, unidirectional silicon rectifier optimized for high-surge, medium-voltage switching applications. Its glass-passivated junction ensures stable reverse leakage across temperature (5 µA at 25°C, 50 µA at 125°C) and robustness against humidity and mechanical stress.
Thermally, it features a junction-to-lead thermal resistance (RθJL) of 30°C/W and operates from –55°C to +150°C. The device uses a cathode-band polarity indicator and matte tin-plated leads compliant with J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 800 V - supports isolation and blocking in 48 V–72 V automotive bus systems with safety margin |
| IF | 1 A continuous - suitable for low-to-medium power rectification in compact PCB layouts |
| IFSM | 30 A (8.3 ms half-sine) - withstands inductive kickback in relay or solenoid drive circuits |
| VF @ 1 A, 25°C | ≤1.1 V - limits conduction loss to ≤1.1 W per diode under full load |
| IR @ 800 V, 25°C | ≤5 µA - ensures minimal standby power loss in high-impedance hold circuits |
| TJ max | +150°C - enables operation in under-hood automotive environments without derating |
| CJ @ 4 V, 1 MHz | 12 pF - low capacitance minimizes switching noise in snubber and flyback clamp networks |
Pinout & Package
Package: DO-214AA (SMB) - surface-mount, molded plastic case with matte tin-plated leads; polarity indicated by cathode band; weight ≈ 0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side (e.g., switch node or ground return) in freewheeling paths |
| Cathode | Current exit terminal during forward conduction; marked with band | Connected to higher-potential rail (e.g., supply line or inductor output) to enable unidirectional current flow |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass-passivated junction | Prevents moisture ingress and metallization corrosion, extending lifetime in humid under-hood conditions |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement before reflow - simplifies SMT assembly logistics |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for eco-conscious manufacturing |
| UL 94V-0 molding compound | Self-extinguishing encapsulant meets flame-retardancy requirements for automotive and industrial enclosures |
Applications
| DC–DC Converter | Automotive Lighting |
|---|---|
Use Scenario: Secondary-side rectification in isolated buck-boost converters powering infotainment displays. IC Role / Device Role / Timing Role: Freewheeling diode providing unidirectional current path during MOSFET off-time. Use Value: Low VF (≤1.1 V) reduces conduction loss; 30 A IFSM handles transient overloads from load dumps. | Use Scenario: LED headlamp current recirculation during PWM dimming transitions. IC Role / Device Role / Timing Role: Snubber diode clamping inductive voltage spikes from LED driver inductors. Use Value: 800 V VRRM safely absorbs 600 V+ transients; glass passivation prevents failure in high-vibration chassis mounts. |
| Freewheeling Circuit | Snubber Network |
Use Scenario: Back-EMF suppression in 12 V HVAC blower motor drivers. IC Role / Device Role / Timing Role: Unidirectional energy return path across brushed DC motor windings. Use Value: 150°C TJ max allows uninterrupted operation near hot engine bays; DO-214AA footprint fits tight motor control PCBs. | Use Scenario: RC-snubber protection for power MOSFETs in 48 V mild-hybrid starter-generators. IC Role / Device Role / Timing Role: Voltage-clamping element absorbing turn-off energy from inductive loads. Use Value: 12 pF junction capacitance minimizes high-frequency ringing; AEC-Q101 qualification ensures long-term stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rectifier diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R08 | Same VRRM (800 V), IF (1 A), but VF = 1.3 V typ; TO-277 package (not SMB) | Higher VF increases conduction loss; larger footprint requires PCB redesign | Choose only if TO-277 mounting is already standardized and thermal margin >20°C exists |
| ON Semi MUR108 | Same VRRM (800 V), IF (1 A), VF = 1.25 V max; DO-41 axial lead, not surface-mount | Through-hole assembly incompatible with automated SMT lines; no AEC-Q101 qualification | Select only for prototyping or legacy through-hole designs where automotive qualification is not required |
Compared with STTH1R08 and MUR108, the S1KBH uniquely combines AEC-Q101 qualification, DO-214AA (SMB) surface-mount compatibility, and 1.1 V VF max - making it the preferred choice for production automotive SMT power stages requiring zero rework risk and thermal headroom.
Availability
S1KBH is available at Aetrix Electronics and suitable for automotive lighting, DC–DC converter secondary rectification, and freewheeling applications requiring stable component supply, long-lifecycle assurance, and AEC-Q101-compliant sourcing.
Supply support for S1KBH 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 automotive markets.
The S1KBH belongs to TSC's AEC-Q101-qualified S1x series of surface-mount rectifiers, designed specifically for high-reliability automotive power conversion and snubbing where thermal stability, surge immunity, and assembly compatibility are critical.
FAQ
What is the maximum junction temperature rating for the S1KBH?
The S1KBH has a maximum junction temperature (TJ) rating of +150°C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet (Version A2102). This allows sustained operation in under-hood automotive environments without thermal derating when mounted on adequate copper area. The S1KBH maintains specified electrical performance up to this limit, and its RθJL of 30°C/W supports effective heat transfer to the PCB.
Is the S1KBH suitable for use in automotive applications?
Yes, the S1KBH is explicitly AEC-Q101 qualified per the manufacturer's documentation, confirming compliance with stress tests including temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge. It is deployed in automotive lighting, DC–DC converters, and freewheeling circuits. The S1KBH's glass-passivated junction, moisture sensitivity level 1, and UL 94V-0 molding compound further validate its suitability for automotive-grade production.
What does the marking code 'S1KB' on the S1KBH indicate?
The marking code 'S1KB' on the S1KBH identifies it as the 800 V variant within Taiwan Semiconductor's S1x series - 'K' corresponds to VRRM = 800 V per the ordering matrix in the datasheet. The full orderable part number is S1KBH, with 'H' denoting the DO-214AA (SMB) package. No additional date or factory codes are part of the base S1KBH identity.
What is the forward voltage drop specification for the S1KBH at rated current?
The S1KBH has a maximum forward voltage drop (VF) 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 pulse conditions (PW = 0.3 ms) and represents worst-case conduction loss. At elevated temperatures (e.g., 125°C), VF decreases slightly, but the 1.1 V limit remains valid for design margining. The S1KBH achieves this while maintaining low leakage and high surge capability.
Does the S1KBH have a halogen-free and RoHS-compliant construction?
Yes, the S1KBH is both RoHS compliant and halogen-free per IEC 61249-2-21, as confirmed in the FEATURES section of the official Taiwan Semiconductor datasheet. Its molding compound, lead finish (matte tin), and internal die construction contain no restricted substances above threshold limits. This makes the S1KBH suitable for environmentally regulated markets and aligns with automotive OEM material declarations required for PPAP submissions.
S1KBH 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):
- 800 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 @ 800 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
S1KBH FAQ
1.How can I place an order for S1KBH through Aetrix?
Please submit a Request for Quotation (RFQ) for S1KBH 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 S1KBH reliable?
The price and inventory of S1KBH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S1KBH is usually 5 days.
3.What payment methods are accepted for S1KBH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S1KBH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S1KBH?
S1KBH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S1KBH 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 S1KBH?
For technical support, including S1KBH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S1KBH requirements.
6.How does Aetrix verify that S1KBH is sourced from the original manufacturer or authorized distributors?
All S1KBH 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 S1KBH meets industry standards.
7.What is the process for return or replacement of S1KBH?
All S1KBH units undergo pre-shipment inspection (PSI). If there is an issue with S1KBH, 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 S1KBH part is unused and in its original packaging.
Return procedure for S1KBH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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