My Inquiry
My Account
Taiwan Semiconductor Corporation 1KSMB16A
- Part No.:
- 1KSMB16A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB16A.pdf
- Description:
- TVS DIODE 13.6VWM 22.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,446
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1KSMB16A 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 protects DC power rails in switching mode power supplies and adapters against ISO 7637-2 transient pulses.
For engineers reviewing the 1KSMB16A datasheet, 1KSMB16A pinout, 1KSMB16A application, or 1KSMB16A equivalent, key selection criteria include unidirectional polarity, 13.6V stand-off voltage (VWM), 1.0µA max reverse leakage at VWM, 44.4A peak pulse current (IPP), and compliance with J-STD-020 moisture sensitivity level 1.
Technical Context
The 1KSMB16A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 15.2–16.8V breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and fast response (<1.0ps from 0V to VBR,min), enabling effective suppression of fast-rising transients like ISO 7637-2 Pulse 1 and Pulse 3b.
Thermally, it features RθJL = 20°C/W and RθJA = 100°C/W, supporting 5W steady-state dissipation at TA = 25°C. The DO-214AA (SMB) package provides robust mechanical mounting and meets UL 94V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 15.2 V / 16.8 V - defines minimum trigger threshold and maximum variation under 1.0 mA test current |
| VWM | 13.6 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC@IPP | 22.5 V - clamped voltage during 44.4 A 10/1000 µs surge, limiting downstream IC stress |
| PPPSM | 1000 W - peak pulse power handling per single 10/1000 µs waveform, derated above 25°C |
| IPP | 44.4 A - maximum non-repetitive surge current the device safely clamps without failure |
| TJ (max) | 175 °C - maximum junction temperature, enabling operation in high-ambient industrial power supplies |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode-banded unidirectional configuration. Matte tin-plated leads, JEDEC-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / low-impedance return during clamping | Connected to system ground or low-side reference; carries full surge current during transient events |
| Cathode | Protected line input / high-side connection | Connected to the line being protected (e.g., +12V rail); reverse-biased during normal operation, avalanches during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable, repeatable VBR performance and long-term reliability under thermal cycling |
| Fast response time <1.0 ps | Enables suppression of sub-nanosecond ESD and fast-switching noise before sensitive circuitry reacts |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive-level load-dump and inductive-switching transient immunity in 12V systems |
| RoHS & halogen-free | Meets IEC 61249-2-21 and global environmental directives for industrial and consumer end equipment |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapters |
|---|---|
Use Scenario: Input rectifier stage and secondary-side DC bus in offline SMPS units exposed to line surges and transformer ringing. IC Role / Device Role: Unidirectional TVS placed across bulk capacitor or MOSFET drain-source to clamp repetitive switching spikes and lightning-induced surges. Use Value: Limits VDS stress on primary-side MOSFETs to ≤22.5V, preventing avalanche failure and improving MTBF. | Use Scenario: Output overvoltage protection in compact wall-mounted AC-DC adapters powering consumer electronics. IC Role / Device Role: Secondary-side TVS connected between regulated +5V/+12V output and GND to absorb coupling transients from primary-to-secondary isolation gaps. Use Value: Maintains output regulation integrity under IEC 61000-4-5 surge testing by clamping to 22.5V while drawing only 1.0 µA at 13.6V standby. |
| Flat Panel TV Power Board | Industrial Monitor DC Input Stage |
Use Scenario: Protection of main 24V/48V DC input rails in LED-backlit TVs subjected to hot-swap and cable discharge events. IC Role / Device Role: Unidirectional TVS mounted directly at board edge connector to shunt external transients before reaching PFC controller and DC-DC stages. Use Value: Withstands 1000W pulses without degradation, preserving signal integrity of HDMI and LVDS interfaces downstream. | Use Scenario: Input protection for 24V-powered industrial monitors in factory automation environments with frequent motor drive switching noise. IC Role / Device Role: TVS placed upstream of EMI filter and buck converter to suppress conducted transients from adjacent VFDs and solenoid drivers. Use Value: 13.6V VWM allows safe operation across full 24V ±10% tolerance range while clamping to 22.5V during 44.4A surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16A (Bourns) | Same DO-214AA package, identical VBR (15.2–16.8V), but VC = 24.4V (vs. 22.5V) and IPP = 41.0A (vs. 44.4A) | Slightly higher clamping increases downstream component stress margin; lower IPP reduces surge margin in high-energy environments | Preferred where Bourns supply chain alignment or qualification history is required; verify VC margin in 24V rail designs |
| P6SMB16A (ON Semiconductor) | Identical electrical specs (VBR, VWM, VC, IPP) and DO-214AA package; same 1000W rating and ISO 7637-2 compliance | No functional difference in circuit behavior; validated in identical automotive and industrial applications | Drop-in alternative with identical layout and performance; selected for dual-sourcing or lifecycle risk mitigation |
Compared with SMBJ16A and P6SMB16A, the 1KSMB16A offers the lowest clamping voltage (22.5V) among the three, reducing stress on downstream regulators and controllers-critical in space-constrained 24V industrial power modules where margin below 25V is essential.
Availability
1KSMB16A is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and flat-panel TV power boards requiring stable component supply and automotive-grade transient immunity.
Supply support for 1KSMB16A 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 TVS diodes, rectifiers, and power devices since 1979.
The 1KSMB series was developed specifically for high-reliability surface-mount transient suppression in automotive and industrial power systems, emphasizing ISO 7637-2 compliance, tight VBR tolerance, and robust thermal performance in SMB packaging.
FAQ
What is the polarity configuration of the 1KSMB16A?
The 1KSMB16A is a unidirectional TVS diode, with cathode indicated by a band on the DO-214AA (SMB) package. It conducts only during reverse overvoltage events and blocks forward current like a standard rectifier diode. This configuration is confirmed in the manufacturer's marking diagram and electrical specifications table, where bidirectional variants are explicitly suffixed with "CA" (e.g., 1KSMB16CA).
Does the 1KSMB16A meet automotive transient standards?
Yes, the 1KSMB16A meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b waveforms, as stated in the official Taiwan Semiconductor datasheet Version I2102. Its 1000W peak pulse rating, fast <1.0ps response, and specified clamping behavior under 10/1000µs surges validate its suitability for 12V automotive power network protection.
What is the maximum clamping voltage of the 1KSMB16A under surge conditions?
The maximum clamping voltage (VC) of the 1KSMB16A is 22.5 V at IPP = 44.4 A with a 10/1000 µs waveform, per the Electrical Specifications table. This value is measured at TA = 25°C and represents the upper limit of voltage seen by protected circuitry during worst-case transient events.
Is the 1KSMB16A RoHS and halogen-free compliant?
Yes, the 1KSMB16A is RoHS compliant and halogen-free per IEC 61249-2-21, as documented in the Features section of the Taiwan Semiconductor datasheet. The molding compound and plating meet UL 94V-0 and J-STD-002 solderability standards, with moisture sensitivity level rated at Level 1.
What is the stand-off voltage (VWM) and why does it matter for 1KSMB16A placement?
The stand-off voltage (VWM) of the 1KSMB16A is 13.6 V, meaning it remains non-conductive up to this reverse voltage with ≤1.0 µA leakage. This parameter determines safe placement on DC rails-for example, it is suitable for 12V systems with ±10% tolerance (10.8–13.2V) but not for nominal 15V rails where sustained operation near VWM could cause thermal runaway.
1KSMB16A 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
1KSMB16A FAQ
1.How can I place an order for 1KSMB16A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB16A 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 1KSMB16A reliable?
The price and inventory of 1KSMB16A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB16A is usually 5 days.
3.What payment methods are accepted for 1KSMB16A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB16A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB16A?
1KSMB16A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB16A 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 1KSMB16A?
For technical support, including 1KSMB16A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB16A requirements.
6.How does Aetrix verify that 1KSMB16A is sourced from the original manufacturer or authorized distributors?
All 1KSMB16A 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 1KSMB16A meets industry standards.
7.What is the process for return or replacement of 1KSMB16A?
All 1KSMB16A units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB16A, 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 1KSMB16A part is unused and in its original packaging.
Return procedure for 1KSMB16A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1KSMB16A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
