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Taiwan Semiconductor Corporation 1KSMB62CAH
- Part No.:
- 1KSMB62CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB62CAH.pdf
- Description:
- TVS DIODE 53VWM 85VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,477
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Product details
Overview
1KSMB62CAH from Taiwan Semiconductor is a bi-directional 62V transient voltage suppressor diode in DO-214AA (SMB) package, rated for 1000W peak pulse power, 53.0V stand-off voltage, and 85.0V maximum clamping voltage at 11.8A peak current. It features AEC-Q101 qualification, glass passivated junction, and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive ESD and load-dump protection.
For engineers reviewing the 1KSMB62CAH datasheet, 1KSMB62CAH pinout, 1KSMB62CAH application, or 1KSMB62CAH equivalent, key selection criteria include bi-directional clamping capability, 175°C max junction temperature, moisture sensitivity level 1, RoHS/halogen-free compliance, and suitability for high-reliability automotive and industrial transient suppression where polarity-agnostic surge handling is required.
Technical Context
The 1KSMB62CAH is a single-die, bi-directional TVS diode designed to protect sensitive electronics against fast-rising transients such as ESD, EFT, and inductive switching spikes. Its breakdown voltage range is 58.9–65.1V at 1mA test current, with clamping occurring at ≤85.0V under 11.8A 10/1000µs impulse.
Thermal performance includes 20°C/W junction-to-lead and 100°C/W junction-to-ambient resistance. It operates across –55°C to +175°C and supports automated SMT placement with matte tin-plated leads compliant to J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 58.9 V / 65.1 V - Ensures reliable conduction onset above system operating voltage while avoiding false triggering |
| VWM | 53.0 V - Maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC@IPP | 85.0 V @ 11.8 A - Clamping voltage during 10/1000µs surge defines protected circuit's worst-case overvoltage stress |
| PPPSM | 1000 W - Peak pulse power rating determines survivability against standardized automotive transients (ISO 7637-2) |
| TJ max | +175 °C - Enables operation in under-hood automotive environments and high-power industrial enclosures |
| Package | DO-214AA (SMB) - Surface-mount footprint compatible with IPC-7351B standard, 0.110 g mass, UL 94V-0 molding |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking; bidirectional configuration means no functional polarity-both terminals serve as symmetrical surge paths. Leads are matte tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge path | Either terminal accepts positive or negative transients-no PCB polarity orientation required |
| Cathode band (marking) | Manufacturing reference only | Present for traceability; functionally irrelevant in bi-directional CAH variant |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock per stress test plan |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal and humidity stress |
| Fast response time <1.0 ps | Clamps transients before downstream ICs experience damaging voltage overshoot |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Complies with full suite of automotive electrical disturbance immunity requirements without external filtering |
| Moisture sensitivity level 1 | Eliminates bake preconditioning prior to reflow-supports standard SMT assembly flow |
Applications
| Automotive Infotainment Power Rails | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting USB, CAN, and display interface power lines in head units exposed to load dump and jump-start surges. IC Role / Device Role / Timing Role: Bi-directional clamping element placed at board-level input filter stage to shunt transient energy before LDOs and PMICs. Use Value: 85.0V clamping ensures downstream 5V/3.3V regulators remain within absolute maximum ratings during 12V system transients up to ±100V. | Use Scenario: Safeguarding 24V digital input modules from inductive kickback when switching solenoids or relays. IC Role / Device Role / Timing Role: Primary transient suppressor mounted directly at connector entry point, ahead of optocoupler input stages. Use Value: 1000W peak power rating absorbs repetitive 24V relay coil turn-off spikes without degradation, extending module service life. |
| LED Streetlight Driver Inputs | Medical Diagnostic Equipment Signal Lines |
Use Scenario: Guarding AC/DC front-end rectifier outputs in outdoor LED drivers subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS after MOV, providing precise low-clamp protection for downstream bridge rectifiers and controllers. Use Value: 53.0V stand-off voltage allows stable operation across 48–56V nominal DC bus while clamping to 85.0V during line surges. | Use Scenario: Shielding isolated analog sensor inputs (e.g., ECG, pressure transducers) from ESD events during clinical handling. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF at 0 V) bi-directional clamp on signal traces adjacent to patient connectors. Use Value: Sub-1 ps response prevents ESD-induced latch-up in precision op-amps and ADC front-ends without distorting µV-level signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA | 64V VBR min (vs. 58.9V), 87.1V VC, same SMB package and 1000W rating | Slightly higher clamping voltage may increase stress on 5V logic rails in tight-margin designs | Select when tighter VBR tolerance (64.0±5%) is preferred over lower clamping voltage |
| 1.5KE62CA | Through-hole DO-15 package, identical 62V rating and 85V clamping, but 1.5kW rating and higher RθJA | Not suitable for high-density SMT layouts; requires manual insertion or wave soldering | Choose only for legacy through-hole systems or prototyping where thermal derating permits |
Compared with SMBJ64CA and 1.5KE62CA, the 1KSMB62CAH offers the lowest clamping voltage among 62V bi-directional SMB TVS diodes, optimal for space-constrained automotive modules requiring AEC-Q101 validation and zero-layout polarity constraints.
Availability
1KSMB62CAH is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC I/O, LED driver inputs, and medical diagnostic equipment requiring stable component supply and full AEC-Q101 compliance.
Supply support for 1KSMB62CAH 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-certified production lines.
The 1KSMBxxCAH series was developed specifically for automotive and industrial transient suppression, emphasizing robustness under repeated surge stress, high-temperature operation, and seamless integration into automated SMT processes.
FAQ
What does the "CAH" suffix indicate in 1KSMB62CAH?
The "CAH" suffix denotes a bi-directional configuration-meaning the 1KSMB62CAH provides symmetrical clamping for both positive and negative transients without polarity sensitivity. Unlike "AH" unidirectional variants, it has no designated anode/cathode for circuit design, simplifying layout and eliminating orientation errors during assembly. This makes the 1KSMB62CAH ideal for AC-coupled or floating signal lines where voltage polarity is undefined.
Is 1KSMB62CAH suitable for ISO 7637-2 Pulse 5a (load dump) protection?
No-1KSMB62CAH is rated for ISO 7637-2 Pulses 1, 2a, 2b, 3a, and 3b, but not Pulse 5a (load dump), which requires higher energy handling (up to 160V, 400ms). The 1KSMB62CAH's 85.0V clamping voltage and 1000W rating are insufficient for sustained load dump conditions. For Pulse 5a, a dedicated load dump suppressor or hybrid solution with upstream TVS + regulator is required alongside the 1KSMB62CAH.
What is the maximum reverse leakage current for 1KSMB62CAH at its rated VWM?
At its 53.0V stand-off voltage (VWM), the 1KSMB62CAH exhibits a maximum reverse leakage current of 1.0 µA at 25°C. This low leakage ensures minimal power loss in always-on circuits and avoids false triggering in high-impedance sensing nodes. Leakage remains below 5.0 µA up to 125°C, supporting reliable operation in thermally demanding environments.
Can 1KSMB62CAH be used in parallel to increase surge current handling?
No-parallel connection of 1KSMB62CAH devices is not recommended due to mismatched dynamic impedance and uneven current sharing during fast transients. Even minor VBR variation (±5%) between units causes one device to dominate conduction, risking thermal runaway. For higher IPP, select a single higher-rated TVS (e.g., 1.5kW SMBJ variant) or implement staged protection with upstream MOV + 1KSMB62CAH.
Does 1KSMB62CAH require derating at elevated ambient temperatures?
Yes-the 1KSMB62CAH's peak pulse power must be derated above 25°C ambient per Figure 2 in the datasheet. At 85°C, its 1000W rating drops to ~650W; at 125°C, it falls to ~400W. Designers must verify worst-case ambient + self-heating stays below derated limits using RθJA = 100°C/W. For high-temp applications, consider thermal relief pads or forced airflow to maintain effective clamping performance of the 1KSMB62CAH.
1KSMB62CAH 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:
- -
- Bidirectional Channels:
- 1
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
1KSMB62CAH FAQ
1.How can I place an order for 1KSMB62CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB62CAH 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 1KSMB62CAH reliable?
The price and inventory of 1KSMB62CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB62CAH is usually 5 days.
3.What payment methods are accepted for 1KSMB62CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB62CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB62CAH?
1KSMB62CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB62CAH 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 1KSMB62CAH?
For technical support, including 1KSMB62CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB62CAH requirements.
6.How does Aetrix verify that 1KSMB62CAH is sourced from the original manufacturer or authorized distributors?
All 1KSMB62CAH 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 1KSMB62CAH meets industry standards.
7.What is the process for return or replacement of 1KSMB62CAH?
All 1KSMB62CAH units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB62CAH, 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 1KSMB62CAH part is unused and in its original packaging.
Return procedure for 1KSMB62CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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