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Taiwan Semiconductor Corporation 1KSMB62A
- Part No.:
- 1KSMB62A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB62A.pdf
- Description:
- TVS DIODE 53VWM 85VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,127
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Product details
Overview
1KSMB62A from Taiwan Semiconductor is a unidirectional 1000W surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage 58.9–65.1 V, stand-off voltage 53.0 V, clamping voltage 85.0 V at 11.8 A, and junction temperature rating up to 175°C. It protects power supplies and adapters against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1KSMB62A datasheet, 1KSMB62A pinout, 1KSMB62A application, or 1KSMB62A equivalent, key selection criteria include unidirectional polarity, 10/1000 µs surge capability, 1.0 mA test current, 1.0 µA max reverse leakage at VWM, and compliance with J-STD-020 moisture level 1 and JESD 201 class 2 whisker resistance.
Technical Context
The 1KSMB62A operates as a unidirectional avalanche diode, activated when reverse voltage exceeds its 58.9–65.1 V breakdown range. Its glass-passivated junction ensures stable clamping performance under repetitive transient stress.
It delivers 1000 W peak pulse power per 10/1000 µs waveform, with thermal resistance of 20 °C/W (junction-to-lead) and 100 °C/W (junction-to-ambient), enabling reliable operation in high-temperature PCB environments without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 58.9 V / 65.1 V - defines minimum and maximum voltage at which avalanche conduction begins under 1.0 mA test current |
| VWM | 53.0 V - maximum continuous reverse operating voltage before significant leakage occurs |
| IPP | 11.8 A - peak impulse current supported at 10/1000 µs waveform without failure |
| VC@IPP | 85.0 V - clamped voltage seen by protected circuit during full-rated surge event |
| PPPSM | 1000 W - non-repetitive peak pulse power handling capability per standard waveform |
| TJ max | 175 °C - maximum allowable junction temperature for sustained reliability |
| Package | DO-214AA (SMB) - surface-mount outline with 0.110 g mass, UL 94V-0 molding, matte tin leads |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking; two terminals - anode and cathode - arranged in axial orientation suitable for automated placement on PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to system ground or low-side return path in unidirectional TVS configuration |
| Cathode | Reverse voltage input / Clamping node | Connected to line being protected (e.g., DC input rail); cathode band identifies polarity |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures long-term stability of breakdown voltage and leakage under thermal cycling and humidity exposure |
| Fast response time <1.0 ps | Enables clamping before transient energy couples into downstream ICs or regulators |
| ISO 7637-2 compliance | Validated for automotive-level transient immunity including Pulse 1 (inductive load dump), 2a/2b (supply interruption), and 3a/3b (capacitive coupling) |
| Moisture sensitivity level 1 | Allows unlimited floor life before reflow; no baking required prior to assembly |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive for environmentally compliant manufacturing |
Applications
| Switching Mode Power Supply (SMPS) | AC-DC Adapters |
|---|---|
Use Scenario: Input rectifier stage of offline SMPS exposed to line surges and load-dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across bulk capacitor or bridge rectifier output to clamp overvoltage spikes. Use Value: Limits transient voltage to ≤85.0 V, protecting primary-side controller and MOSFETs rated for 100 V drain-source breakdown. | Use Scenario: Secondary-side DC output rail of universal-input wall adapters subject to ESD and fast transients. IC Role / Device Role / Timing Role: Standoff-rated protection device installed between +VOUT and GND to suppress coupling from primary side or external cable events. Use Value: Maintains 53.0 V stand-off while clamping 11.8 A surges to 85.0 V, preserving regulation integrity of 5 V/12 V/19 V outputs. |
| Flat Panel TV Power Board | Monitor Backlight Inverter Input |
Use Scenario: Main 12 V/24 V supply rail feeding logic board and LED driver modules in consumer TVs. IC Role / Device Role / Timing Role: Primary overvoltage suppression element upstream of DC-DC converters and microcontrollers. Use Value: Withstands repeated 1000 W pulses per ISO 7637-2, preventing latch-up or damage to 3.3 V/5 V LDOs and HDMI interface ICs. | Use Scenario: High-voltage DC input (e.g., 24–48 V) to CCFL or LED backlight inverter circuits. IC Role / Device Role / Timing Role: Transient shunt placed across inverter input capacitor to prevent overvoltage-induced gate oxide stress on MOSFET drivers. Use Value: Clamps 10/1000 µs transients to 85.0 V, staying below typical 100 V MOSFET VDS rating and avoiding destructive avalanche in driver stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ60A (Bourns) | 60 V VBR min (57–63 V), same DO-214AA package, 1000 W rating, but 87.1 V clamping at 11.5 A | Slightly lower clamping voltage margin; tighter VBR tolerance may reduce design guardband | Preferable where tighter VBR control is needed and 87.1 V clamping is acceptable |
| P6SMB62A (ON Semiconductor) | Identical VBR (58.9–65.1 V), same DO-214AA, 1000 W, but 85.0 V clamping at 11.8 A - matches 1KSMB62A exactly | No functional difference in electrical behavior or mounting; identical thermal and surge specs | Drop-in alternative with validated second-source availability and same production qualification status |
Compared with SMBJ60A and P6SMB62A, the 1KSMB62A offers identical clamping performance to P6SMB62A and superior voltage margin over SMBJ60A, making it optimal for designs requiring precise 62 V-class standoff with guaranteed ≤85.0 V clamping under full-rated surge.
Availability
1KSMB62A is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and flat-panel display power boards requiring stable component supply and automotive-grade transient immunity.
Supply support for 1KSMB62A 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-Q qualified product lines.
The 1KSMB62A belongs to TSC's SMB-series unidirectional TVS family, engineered for high-energy transient suppression in cost-sensitive industrial and consumer power systems where DO-214AA footprint and ISO 7637-2 compliance are mandatory.
FAQ
What is the breakdown voltage range of the 1KSMB62A?
The 1KSMB62A has a specified breakdown voltage range of 58.9 V to 65.1 V at 1.0 mA test current (VBR@IT). This range reflects manufacturing tolerance and ensures consistent avalanche initiation across production lots while maintaining compatibility with 62 V nominal system rails. The 1KSMB62A is tested per ANSI/IEEE C62.35 standards.
Is the 1KSMB62A suitable for bidirectional transient protection?
No, the 1KSMB62A is unidirectional only. For bidirectional protection, the 1KSMB62CA variant must be used - it features symmetrical breakdown in both polarities and carries the "CA" suffix. The 1KSMB62A has a cathode band marking and is intended for DC line-to-ground protection where polarity is fixed.
What is the maximum clamping voltage of the 1KSMB62A under surge conditions?
The 1KSMB62A exhibits a maximum clamping voltage (VC) of 85.0 V when subjected to its rated 11.8 A peak impulse current (IPP) under the standard 10/1000 µs waveform. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Does the 1KSMB62A meet automotive transient immunity standards?
Yes, the 1KSMB62A meets ISO 7637-2 requirements for Pulse 1 (inductive switch-off), Pulse 2a/2b (supply disconnection), and Pulse 3a/3b (capacitive coupling), making it suitable for 12 V and 24 V automotive subsystems such as infotainment power supplies and body control modules where the 1KSMB62A provides certified front-end protection.
What is the moisture sensitivity level (MSL) rating for the 1KSMB62A?
The 1KSMB62A is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30°C/60% RH and requires no baking prior to reflow soldering. This simplifies manufacturing logistics and eliminates moisture-related popcorning risk during PCB assembly - a key advantage of the 1KSMB62A in high-volume SMT production.
1KSMB62A 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):
- 53V
- Voltage - Breakdown (Min):
- 58.9V
- Voltage - Clamping (Max) @ Ipp:
- 85V
- Current - Peak Pulse (10/1000µs):
- 11.8A
- 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)
1KSMB62A FAQ
1.How can I place an order for 1KSMB62A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB62A 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 1KSMB62A reliable?
The price and inventory of 1KSMB62A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB62A is usually 5 days.
3.What payment methods are accepted for 1KSMB62A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB62A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB62A?
1KSMB62A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB62A 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 1KSMB62A?
For technical support, including 1KSMB62A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB62A requirements.
6.How does Aetrix verify that 1KSMB62A is sourced from the original manufacturer or authorized distributors?
All 1KSMB62A 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 1KSMB62A meets industry standards.
7.What is the process for return or replacement of 1KSMB62A?
All 1KSMB62A units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB62A, 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 1KSMB62A part is unused and in its original packaging.
Return procedure for 1KSMB62A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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