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Taiwan Semiconductor Corporation 1KSMB16AH
- Part No.:
- 1KSMB16AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB16AH.pdf
- Description:
- TVS DIODE 13.6VWM 22.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,976
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Product details
Overview
1KSMB16AH from Taiwan Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AA (SMB) package, rated for 1000W peak pulse power, 15.2–16.8V breakdown voltage (VBR), and 22.5V clamping voltage (VC@IPP). It provides fast transient suppression for automotive and industrial power rails.
For engineers reviewing the 1KSMB16AH datasheet, 1KSMB16AH pinout, 1KSMB16AH application, or 1KSMB16AH equivalent, key selection criteria include its AEC-Q101 qualification, 13.6V stand-off voltage (VWM), 1.0µA max reverse leakage at VWM, 44.4A peak impulse current (IPP), and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b.
Technical Context
The 1KSMB16AH operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve sub-1ps response time and stable clamping under high-energy transients. Its thermal design supports 175°C maximum junction temperature and 20°C/W junction-to-lead resistance.
It is engineered for single-die configuration in SMB package, with polarity marked by cathode band, matte tin-plated leads compliant with J-STD-002, and moisture sensitivity level 1 per J-STD-020 - enabling robust automated placement in high-reliability PCB assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 15.2 V / 16.8 V - defines minimum voltage at which avalanche conduction begins reliably at 1.0 mA test current |
| VWM | 13.6 V - maximum continuous reverse operating voltage before significant leakage occurs |
| VC@IPP | 22.5 V - clamped voltage during 44.4 A 10/1000 µs surge, limiting downstream IC stress |
| IPP | 44.4 A - peak surge current capability under standardized 10/1000 µs waveform |
| PPPSM | 1000 W - non-repetitive peak pulse power handling capacity |
| TJ max | 175 °C - enables operation in under-hood automotive environments and industrial enclosures |
| Leakage @ VWM | 1.0 µA - ensures minimal standby power loss and signal integrity in low-power systems |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-ended unidirectional configuration with cathode band marking. Weight: 0.110 g. Molding compound meets UL 94V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return in unidirectional clamp configuration |
| Cathode | Transient voltage sensing and clamping node | Connected to protected line (e.g., 12V rail); conducts when VKA ≥ VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal stress |
| Fast response time < 1.0 ps | Clamps transients before sensitive logic or analog circuitry sustains damage |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Meets automotive electrical disturbance immunity requirements for battery-supplied systems |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or special handling prior to assembly |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load dump and jump-start surges on 12V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between battery rail and upstream regulator input. Use Value: Limits transient voltage to ≤22.5 V during 44.4 A pulses, protecting LDOs and microcontrollers rated for 28 V absolute max. | Use Scenario: Shielding 4–20 mA loop-powered sensors from EFT bursts and inductive switching noise in factory automation. IC Role / Device Role / Timing Role: Standoff protection device across sensor supply terminals, referenced to local ground. Use Value: Maintains 13.6 V operating margin while clamping 10/1000 µs spikes to 22.5 V, preserving analog front-end accuracy. |
| LED Driver Input Protection | DC-DC Converter Input Stage Protection |
Use Scenario: Guarding constant-current LED drivers against back-EMF from relay coils and motor commutation in signage and lighting systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input bus, positioned ahead of input filter capacitor. Use Value: Absorbs 1000 W transient energy without degradation, ensuring driver IC survival during repetitive 44.4 A surges. | Use Scenario: Protecting buck controller ICs and MOSFET gate drivers from voltage reversals and line transients in industrial SMPS designs. IC Role / Device Role / Timing Role: Fast-acting shunt limiter on converter input rail, coordinated with bulk capacitance. Use Value: Delivers 22.5 V clamping with 1.0 µA leakage at 13.6 V, minimizing quiescent loss while enabling tight input voltage margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16A | Same DO-214AA package, identical VBR (15.2–16.8 V), but lower PPPSM = 600 W and higher VC = 26.0 V | Not suitable for ISO 7637-2 Pulse 1 (load dump) due to insufficient power rating and clamping margin | Select only for lower-energy ESD/EFT scenarios where 600 W suffices and layout space constraints favor SMB footprint |
| 1.5KE16A | Higher PPPSM = 1500 W, but axial DO-201AD package - incompatible with automated SMT assembly | Requires manual insertion or through-hole rework; unsuitable for high-volume automotive PCBs | Consider only for prototyping or legacy through-hole designs where 1500 W margin justifies assembly overhead |
Compared with SMBJ16A and 1.5KE16A, the 1KSMB16AH uniquely combines AEC-Q101 qualification, 1000 W surge rating, 22.5 V clamping, and DO-214AA SMT compatibility - making it optimal for production automotive and industrial power rail protection where reliability, power density, and process scalability are jointly critical.
Availability
1KSMB16AH is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, LED driver inputs, and DC-DC converter input stages requiring stable component supply and full AEC-Q101 traceability.
Supply support for 1KSMB16AH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101-compliant production lines.
The 1KSMB series is designed specifically for high-reliability transient suppression in automotive and industrial environments - emphasizing robustness under ISO 7637-2 pulses, low leakage, and SMT manufacturability in DO-214AA.
FAQ
What is the polarity configuration of the 1KSMB16AH?
The 1KSMB16AH is a unidirectional TVS diode, with cathode marked by a band on the DO-214AA package. It conducts only when cathode voltage exceeds anode voltage by ≥15.2 V, making it suitable for DC rail clamping where polarity is fixed. Bidirectional variants use the "CAH" suffix (e.g., 1KSMB16CAH).
Does the 1KSMB16AH meet automotive qualification standards?
Yes, the 1KSMB16AH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. Its glass-passivated junction, 175°C TJ rating, and moisture sensitivity level 1 support deployment in under-hood and chassis-mounted automotive modules.
What is the maximum clamping voltage of the 1KSMB16AH under surge conditions?
The 1KSMB16AH has a maximum clamping voltage (VC) of 22.5 V when subjected to its rated 44.4 A peak impulse current (IPP) using the 10/1000 µs waveform. This value is guaranteed across temperature and lifetime, ensuring predictable protection margin for downstream 24 V-rated components.
Can the 1KSMB16AH be used in bidirectional signal line protection?
No - the 1KSMB16AH is unidirectional only. For bidirectional AC or data-line protection, the 1KSMB16CAH variant must be selected. The "CAH" suffix denotes symmetrical breakdown in both directions, whereas the "AH" suffix indicates single-polarity avalanche behavior.
What is the standoff voltage (VWM) and why does it matter for 1KSMB16AH system integration?
The 1KSMB16AH has a VWM of 13.6 V, meaning it remains effectively non-conductive up to this DC or RMS voltage. This allows safe integration on nominal 12 V systems with ±10% tolerance, preventing leakage-induced power loss or false triggering while retaining headroom for transient clamping.
1KSMB16AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- 1KSMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 13.6V
- Voltage - Breakdown (Min):
- 15.2V
- Voltage - Clamping (Max) @ Ipp:
- 22.5V
- Current - Peak Pulse (10/1000µs):
- 44.4A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
1KSMB16AH FAQ
1.How can I place an order for 1KSMB16AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB16AH 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 1KSMB16AH reliable?
The price and inventory of 1KSMB16AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB16AH is usually 5 days.
3.What payment methods are accepted for 1KSMB16AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB16AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB16AH?
1KSMB16AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB16AH 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 1KSMB16AH?
For technical support, including 1KSMB16AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB16AH requirements.
6.How does Aetrix verify that 1KSMB16AH is sourced from the original manufacturer or authorized distributors?
All 1KSMB16AH 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 1KSMB16AH meets industry standards.
7.What is the process for return or replacement of 1KSMB16AH?
All 1KSMB16AH units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB16AH, 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 1KSMB16AH part is unused and in its original packaging.
Return procedure for 1KSMB16AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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