My Inquiry
My Account
Taiwan Semiconductor Corporation 1KSMB82AH
- Part No.:
- 1KSMB82AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB82AH.pdf
- Description:
- TVS DIODE 70.1VWM 113VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,756
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1KSMB82AH from Taiwan Semiconductor is a unidirectional 1000W surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage 77.9–86.1 V, stand-off voltage 70.1 V, clamping voltage 113 V at 8.8 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the 1KSMB82AH datasheet, 1KSMB82AH pinout, 1KSMB82AH application, or 1KSMB82AH equivalent, key selection criteria include unidirectional polarity, 10/1000 µs surge rating, ISO 7637-2 pulse immunity, moisture sensitivity level 1, and compatibility with automated SMT placement on PCBs requiring robust ESD and load-dump protection.
Technical Context
The 1KSMB82AH operates as a unidirectional avalanche diode, designed to clamp transient overvoltages above its breakdown threshold while maintaining low leakage (<1 µA at 70.1 V) during normal operation. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under repetitive stress.
It delivers 1000 W peak pulse power per 10/1000 µs waveform, with fast response time <1.0 ps, and thermal resistance RθJL = 20 °C/W enabling effective heat dissipation in high-density automotive and industrial PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 77.9 V / 86.1 V - defines minimum and maximum guaranteed avalanche initiation voltage at 1 mA test current |
| VWM | 70.1 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPP | 113 V at 8.8 A - clamped voltage during full 1000 W surge, critical for downstream IC voltage margining |
| PPPSM | 1000 W - peak pulse power handling capability per standard 10/1000 µs waveform |
| IPP | 8.8 A - peak impulse current corresponding to 1000 W clamping at 113 V |
| TJ max | +175 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | DO-214AA (SMB) - standardized surface-mount outline with 0.110 g mass and J-STD-002 solderability |
Pinout & Package
DO-214AA (SMB) package with cathode band marking for unidirectional polarity; matte tin-plated leads; UL 94V-0 molding compound; polarity indicated by band on cathode end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry during forward conduction or transient clamping | Connected to protected circuit ground or low-side return path |
| Cathode | Current exit during reverse-biased clamping | Connected to protected line (e.g., 12 V rail); band-marked terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD |
| Glass passivated junction | Enhances long-term stability of VBR and reduces parameter drift under thermal/humidity stress |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD-like spikes) |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement prior to reflow, simplifying SMT manufacturing flow |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives for environmentally compliant production |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in engine control units (ECUs) against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤113 V, preserving downstream PMIC and MCU inputs rated for 16 V absolute max. | Use Scenario: Shielding analog sensor signal lines (e.g., pressure, temperature) from EFT and ESD coupling in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF at 0 V) unidirectional suppressor mounted at connector entry point. Use Value: Prevents latch-up or damage to precision op-amps and ADC front-ends without distorting low-frequency sensor signals. |
| LED Lighting Driver Input Protection | Telecom Power Supply Surge Clamping |
Use Scenario: Safeguarding constant-current LED drivers in commercial lighting against mains-induced surges and switching noise. IC Role / Device Role / Timing Role: Primary-line TVS connected across input bulk capacitor terminals. Use Value: Absorbs 1000 W pulses without degradation, maintaining driver uptime and eliminating need for redundant fusing. | Use Scenario: Front-end surge suppression in PoE-powered telecom equipment exposed to lightning-induced surges on Ethernet lines. IC Role / Device Role / Timing Role: Secondary-stage clamping device after isolation transformer, protecting PHY and DC-DC controller. Use Value: Delivers sub-nanosecond response to fast-rising transients while meeting IEC 61000-4-5 Level 4 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ82A | Same DO-214AA package; VBR = 91.1–101 V; VC = 131 V at 7.6 A; lower PPPM = 600 W | Higher clamping voltage reduces margin for 12 V systems; suitable only where 131 V clamping is acceptable | Select when cost priority outweighs clamping performance and system voltage headroom allows higher VC |
| 1.5SMC82A | DO-214AB (SMC) package; larger footprint; VBR = 86.5–95.5 V; VC = 118 V at 8.5 A; PPPM = 1500 W | Requires PCB layout change; better thermal performance but incompatible with SMB-restricted board space | Choose when higher surge energy handling and thermal derating are required, and board area permits SMC footprint |
Compared with SMBJ82A and 1.5SMC82A, the 1KSMB82AH offers optimal balance of 1000 W surge capability, tight 77.9–86.1 V VBR tolerance, and SMB footprint-making it preferred for space-constrained automotive modules where clamping voltage must stay below 115 V.
Availability
1KSMB82AH is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, LED lighting drivers, and telecom power supplies requiring stable component supply with AEC-Q101 assurance and lead-time visibility.
Supply support for 1KSMB82AH 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 engineered for high-reliability transient suppression in automotive and industrial environments, emphasizing robustness against ISO 7637-2 pulses, low leakage, and automated assembly compatibility.
FAQ
What is the polarity configuration of the 1KSMB82AH?
The 1KSMB82AH is a unidirectional TVS diode, with cathode marked by a band on the DO-214AA package. It conducts only during reverse-biased overvoltage events and blocks forward current like a standard rectifier. This polarity enables precise clamping on positive-rail transients without affecting normal DC operation-critical for 12 V automotive supply protection where the cathode connects to the protected line and anode to ground.
Does the 1KSMB82AH meet automotive qualification standards?
Yes, the 1KSMB82AH is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22-A114. Its qualification confirms suitability for under-hood and cabin automotive applications such as body control modules and infotainment power supplies-where reliability under thermal, vibration, and electrical stress is mandatory.
What is the maximum clamping voltage of the 1KSMB82AH during a 1000 W surge?
The 1KSMB82AH has a maximum clamping voltage (VC) of 113 V at 8.8 A, measured under the standard 10/1000 µs waveform. This value represents the peak voltage seen by downstream components during full-rated surge events and is essential for verifying voltage margin against IC absolute maximum ratings-e.g., ensuring microcontrollers with 16 V absolute max inputs remain within safe limits.
Can the 1KSMB82AH be used in bidirectional applications?
No-the 1KSMB82AH is unidirectional only. For bidirectional transient suppression, the pin-compatible 1KSMB82CAH variant must be used. The "CAH" suffix indicates symmetrical breakdown in both polarities, enabling protection of AC-coupled or differential signal lines. Substituting 1KSMB82AH in bidirectional circuits risks failure during negative transients due to lack of reverse avalanche capability.
What is the moisture sensitivity level (MSL) of the 1KSMB82AH and how does it affect assembly?
The 1KSMB82AH has MSL Level 1 per J-STD-020, meaning it may be stored indefinitely at ambient conditions (≤30 °C / 60% RH) without baking prior to reflow. This eliminates floor-life tracking and pre-bake steps in SMT lines, reducing process complexity and cost-especially valuable for high-volume automotive contract manufacturers using tape-and-reel delivery (3,000 pcs/reel).
1KSMB82AH 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):
- 70.1V
- Voltage - Breakdown (Min):
- 77.9V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 8.8A
- 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)
1KSMB82AH FAQ
1.How can I place an order for 1KSMB82AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB82AH 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 1KSMB82AH reliable?
The price and inventory of 1KSMB82AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB82AH is usually 5 days.
3.What payment methods are accepted for 1KSMB82AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB82AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB82AH?
1KSMB82AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB82AH 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 1KSMB82AH?
For technical support, including 1KSMB82AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB82AH requirements.
6.How does Aetrix verify that 1KSMB82AH is sourced from the original manufacturer or authorized distributors?
All 1KSMB82AH 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 1KSMB82AH meets industry standards.
7.What is the process for return or replacement of 1KSMB82AH?
All 1KSMB82AH units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB82AH, 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 1KSMB82AH part is unused and in its original packaging.
Return procedure for 1KSMB82AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1KSMB82AH 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…
