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Taiwan Semiconductor Corporation 1KSMB62AH
- Part No.:
- 1KSMB62AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB62AH.pdf
- Description:
- TVS DIODE 53VWM 85VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,714
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Product details
Overview
1KSMB62AH 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 AEC-Q101 qualification for automotive use.
For engineers reviewing the 1KSMB62AH datasheet, 1KSMB62AH pinout, 1KSMB62AH application, or 1KSMB62AH equivalent, key selection criteria include peak pulse power (1000 W), clamping performance under 10/1000 µs transients, unidirectional polarity, AEC-Q101 compliance, and DO-214AA thermal and mechanical compatibility in space-constrained PCB layouts.
Technical Context
The 1KSMB62AH is a glass-passivated, single-die unidirectional TVS diode optimized for fast transient suppression in automotive and industrial power rails. It delivers sub-1 ps response time from 0 V to VBR(min), meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements, and operates across -55 °C to +175 °C junction temperature range.
Its 20 °C/W junction-to-lead thermal resistance enables effective heat dissipation during high-energy surges, while its 1000 W non-repetitive peak impulse power rating (10/1000 µs waveform) supports robust protection against load dump and inductive switching events without degradation under rated conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 58.9 V / 65.1 V - Ensures reliable avalanche conduction onset above system operating voltage (e.g., 48 V nominal bus) |
| VWM | 53.0 V - Maximum continuous reverse working voltage; sets safe margin below VBR(min) to prevent leakage-induced stress |
| VC@IPP | 85.0 V @ 11.8 A - Clamped voltage during 10/1000 µs surge; defines maximum stress imposed on protected downstream ICs |
| PPPSM | 1000 W - Peak pulse power handling capacity; determines survivability against high-energy transients like ISO 7637-2 Pulse 5a |
| IPP | 11.8 A - Peak surge current capability at rated clamping voltage; used to size upstream fusing and trace routing |
| TJ(max) | +175 °C - Maximum junction temperature; supports operation in under-hood automotive environments with minimal derating |
| RθJL | 20 °C/W - Junction-to-lead thermal resistance; enables direct thermal path to PCB copper for sustained surge duty cycles |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode-banded unidirectional configuration. Matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path; forms current sink during transient clamp |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 48 V rail); polarity marking ensures correct orientation for unidirectional clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under humidity and thermal stress vs. epoxy-passivated alternatives |
| Fast response time <1.0 ps | Enables clamping before transient energy couples into sensitive analog or digital circuitry downstream |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Complies with automotive EMC immunity requirements for battery line and signal line transients |
| DO-214AA mechanical robustness | Supports automated SMT placement and withstands board flexure; 0.110 g weight minimizes mechanical stress on solder joints |
Applications
| Automotive Power Rail Protection | Industrial DC Power Input Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs from load dump and alternator transients in passenger vehicles and commercial trucks. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input to clamp overvoltage spikes before they reach regulator ICs. Use Value: Limits peak voltage to ≤85.0 V during 10/1000 µs surges, preventing latch-up or permanent damage to downstream PMICs and microcontrollers. | Use Scenario: Safeguarding programmable logic controllers (PLCs) and motor drives connected to 24–60 V industrial power supplies subject to inductive switching noise. IC Role / Device Role / Timing Role: Standoff-rated TVS on main DC input to absorb repetitive switching transients from contactors and solenoids. Use Value: Withstands ≥1000 W peak pulses without degradation, maintaining VWM = 53.0 V integrity across extended operational life in factory environments. |
| LED Driver Supply Protection | Telecom Power Interface Protection |
Use Scenario: Shielding constant-current LED drivers in street lighting systems from lightning-induced surges on long outdoor wiring runs. IC Role / Device Role / Timing Role: Primary transient suppressor on HV DC input stage, coordinated with MOVs and gas discharge tubes in multi-stage protection architecture. Use Value: Fast <1.0 ps response ensures clamping occurs before surge propagates through driver IC's internal gate oxide, preserving reliability over 10+ year deployments. | Use Scenario: Securing PoE-powered remote radio units (RRUs) and base station control boards against induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: First-line unidirectional TVS on DC input before DC-DC isolation stage, meeting IEC 61000-4-5 Level 4 immunity requirements. Use Value: 175 °C max junction temperature and J-STD-020 Level 1 moisture rating ensure uninterrupted operation in sealed outdoor enclosures with passive thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | VBR = 71.1–78.6 V, VC = 103 V @ 9.7 A, same DO-214AA package | Higher clamping voltage increases stress on protected ICs; suitable only where system OV tolerance exceeds 103 V | Select SMBJ64A only if higher VBR aligns with system margin requirements and clamping headroom permits |
| 1.5SMC68A | VBR = 72.2–80.6 V, VC = 112 V @ 8.9 A, larger DO-214AB (SMC) package | Requires PCB layout change due to larger footprint and higher clamping voltage; not drop-in compatible | Choose 1.5SMC68A only when 1000 W rating must be retained with greater thermal mass, accepting larger board area |
Compared with SMBJ64A and 1.5SMC68A, the 1KSMB62AH provides lower clamping voltage (85.0 V vs. ≥103 V) and tighter VBR tolerance (±5.2% vs. ±5.3–5.5%), enabling more precise protection coordination in 48–60 V systems without sacrificing AEC-Q101 compliance or DO-214AA manufacturability.
Availability
1KSMB62AH is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC power inputs, LED driver supply rails, and telecom PoE interface circuits requiring stable component supply and AEC-Q101 assurance.
Supply support for 1KSMB62AH 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 validation capabilities.
The 1KSMB series was designed specifically for high-reliability transient suppression in automotive and industrial power systems, emphasizing fast response, tight parametric control, and robust packaging for automated SMT assembly.
FAQ
What is the breakdown voltage range of the 1KSMB62AH?
The 1KSMB62AH has a guaranteed breakdown voltage range of 58.9 V to 65.1 V at 1.0 mA test current, measured per ANSI/IEEE C62.35. This range reflects manufacturing tolerance and ensures consistent avalanche initiation across production lots while maintaining safe margin above its 53.0 V stand-off voltage. The 1KSMB62AH is specified for unidirectional operation only.
Is the 1KSMB62AH suitable for automotive applications?
Yes, the 1KSMB62AH is AEC-Q101 qualified and explicitly validated for automotive use, including temperature cycling, high-temperature reverse bias, and mechanical shock testing. Its DO-214AA package, 175 °C max junction temperature, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b make it appropriate for engine control units, body control modules, and ADAS power supplies where the 1KSMB62AH serves as primary transient suppression.
What is the maximum clamping voltage of the 1KSMB62AH under surge conditions?
The 1KSMB62AH exhibits a maximum clamping voltage of 85.0 V at 11.8 A peak pulse current (10/1000 µs waveform). This value represents the upper limit of voltage seen by downstream components during worst-case transient events and is critical for ensuring protected ICs remain within their absolute maximum ratings. The 1KSMB62AH achieves this with sub-1 ps response time.
Does the 1KSMB62AH have bidirectional capability?
No, the 1KSMB62AH is a unidirectional TVS diode, indicated by the "AH" suffix and cathode band marking. For bidirectional operation, the equivalent part is 1KSMB62CAH (with "CAH" suffix), which provides symmetrical clamping for AC-coupled or floating signal lines. The 1KSMB62AH must be oriented correctly on PCB with cathode toward the protected line.
What is the thermal resistance specification for the 1KSMB62AH?
The 1KSMB62AH has a junction-to-lead thermal resistance (RθJL) of 20 °C/W and a junction-to-ambient thermal resistance (RθJA) of 100 °C/W. These values are measured under standard JEDEC conditions and confirm efficient heat transfer from the silicon die to the PCB via the leads, supporting reliable operation during repetitive surge events without exceeding the 175 °C maximum junction temperature limit of the 1KSMB62AH.
1KSMB62AH 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
1KSMB62AH FAQ
1.How can I place an order for 1KSMB62AH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB62AH 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 1KSMB62AH reliable?
The price and inventory of 1KSMB62AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB62AH is usually 5 days.
3.What payment methods are accepted for 1KSMB62AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB62AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB62AH?
1KSMB62AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB62AH 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 1KSMB62AH?
For technical support, including 1KSMB62AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB62AH requirements.
6.How does Aetrix verify that 1KSMB62AH is sourced from the original manufacturer or authorized distributors?
All 1KSMB62AH 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 1KSMB62AH meets industry standards.
7.What is the process for return or replacement of 1KSMB62AH?
All 1KSMB62AH units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB62AH, 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 1KSMB62AH part is unused and in its original packaging.
Return procedure for 1KSMB62AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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