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Taiwan Semiconductor Corporation 1KSMB30CA
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- Part No.:
- 1KSMB30CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB30CA.pdf
- Description:
- TVS DIODE 25.6VWM 41.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,469
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Product details
Overview
1KSMB30CA from Taiwan Semiconductor is a bi-directional 1000W transient voltage suppressor (TVS) in DO-214AA (SMB) package, with breakdown voltage 28.5–31.5 V at 1.0 mA test current, clamping voltage 41.4 V at 24.2 A peak pulse current, and operating junction temperature range of −55 °C to +175 °C. It protects DC power rails in switching mode power supplies and consumer displays against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1KSMB30CA datasheet, 1KSMB30CA pinout, 1KSMB30CA application, or 1KSMB30CA equivalent, key selection criteria include bi-directional clamping capability, 1000W peak pulse power rating, DO-214AA surface-mount compatibility, moisture sensitivity level 1, and compliance with RoHS and halogen-free standards per IEC 61249-2-21.
Technical Context
The 1KSMB30CA uses a glass passivated silicon junction to achieve fast response time (<1.0 ps from 0 V to VBR(min)) and stable clamping under repetitive surge stress. Its bi-directional configuration enables symmetric protection of AC-coupled or floating signal lines without polarity dependency.
Thermal performance is defined by RθJL = 20 °C/W and RθJA = 100 °C/W, supporting operation up to 175 °C junction temperature. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for the molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 28.5 V / 31.5 V - Ensures reliable conduction onset above 25.6 V stand-off voltage while maintaining margin against false triggering |
| VC@IPP | 41.4 V at 24.2 A - Limits downstream voltage during 10/1000 µs surge to safe levels for 3.3 V/5 V/12 V logic and power ICs |
| PPPSM | 1000 W - Sustains high-energy transients such as load dump or inductive switching in automotive and industrial SMPS |
| IPP | 24.2 A - Peak current handling capacity validated per ANSI/IEEE C62.35 for unidirectional/bidirectional waveforms |
| TJ max | +175 °C - Enables placement near heat-generating components like MOSFETs or transformers without derating |
| Package | DO-214AA (SMB) - Surface-mount footprint compatible with automated pick-and-place and reflow soldering per J-STD-002 |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads; cathode band marking applies only to unidirectional variants - the 1KSMB30CA is bi-directional and has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as input/output; no orientation required during PCB layout or assembly |
| Case | Non-conductive thermal path | Plastic body provides electrical isolation; thermal transfer occurs via leadframe to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Improves long-term reliability and leakage stability under humidity and thermal cycling vs. epoxy-passivated alternatives |
| Response time <1.0 ps | Clamps ESD and fast transients before sensitive downstream circuitry experiences overvoltage stress |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Validated for automotive-level conducted immunity testing including battery disconnect and inductive load dump |
| Moisture sensitivity level 1 | Eliminates bake-out requirement prior to reflow, reducing manufacturing cost and process complexity |
| Halogen-free per IEC 61249-2-21 | Supports environmental compliance for export to EU, Japan, and other regulated markets without material declaration burden |
Applications
| Switching Mode Power Supply (SMPS) | Consumer Display (TV/Monitor) |
|---|---|
Use Scenario: Protection of primary-side DC bus and secondary-side 12 V/24 V rails against switching noise and line surges. IC Role / Device Role / Timing Role: Bi-directional TVS placed across input capacitor or post-regulator output to clamp differential-mode transients. Use Value: Prevents latch-up or permanent damage to PWM controllers and synchronous rectifiers during 1000 W surge events. | Use Scenario: Safeguarding HDMI, LVDS, and power inputs in flat-panel TVs and monitors exposed to ESD and cable discharge. IC Role / Device Role / Timing Role: Standoff voltage of 25.6 V allows integration on 24 V bias rails without leakage-induced standby current increase. Use Value: Maintains signal integrity and prevents pixel corruption or black-screen faults during 8 kV contact ESD per IEC 61000-4-2. |
| Automotive Body Control Module | Industrial AC-DC Adapter |
Use Scenario: Input protection for 12 V/24 V microcontroller power domains subjected to ISO 7637-2 Pulse 2b (supply line transient). IC Role / Device Role / Timing Role: Bidirectional clamping eliminates need for dual unidirectional devices or polarity-aware layout. Use Value: Reduces BOM count and PCB area versus discrete Zener+capacitor solutions while meeting OEM surge test requirements. | Use Scenario: Overvoltage suppression on universal-input (90–264 VAC) adapter outputs feeding USB-C PD or PoE-powered devices. IC Role / Device Role / Timing Role: Clamps induced surges from nearby relay switching or lightning-induced coupling on low-voltage DC outputs. Use Value: Enables compliance with EN 61000-4-5 Level 3 (2 kV line-earth) without adding bulkier MOV-based front-end stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA (Bourns) | Same DO-214AA package, identical VBR (28.5–31.5 V), but higher VC = 48.4 V at 20.7 A | Lower peak current handling (20.7 A vs. 24.2 A) reduces margin for high-energy 10/1000 µs pulses | Select when supply chain diversification is prioritized and clamping voltage margin permits higher VC |
| P6SMB30CA (ON Semiconductor) | Identical electrical specs and DO-214AA footprint; differs in marking code and JEDEC-compliant qualification testing scope | No functional difference in circuit protection behavior; validated for same ISO 7637-2 pulses and thermal profiles | Drop-in alternative where ON Semi sourcing or specific AEC-Q200-aligned documentation is required |
Compared with SMBJ30CA and P6SMB30CA, the 1KSMB30CA offers the lowest clamping voltage (41.4 V) among DO-214AA 30 V bi-directional TVS diodes, delivering tighter overvoltage control for 3.3 V/5 V logic interfaces while maintaining full 1000 W surge rating.
Availability
1KSMB30CA is available at Aetrix Electronics and suitable for switching mode power supplies, consumer displays, and automotive body control modules requiring stable component supply and consistent surge performance across production batches.
Supply support for 1KSMB30CA 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 for industrial and automotive applications.
The 1KSMB series is designed specifically for high-reliability surface-mount transient suppression in space-constrained, high-surge environments-emphasizing robustness, automated assembly compatibility, and compliance with global EMC standards.
FAQ
What does the 'CA' suffix indicate in 1KSMB30CA?
The 'CA' suffix in 1KSMB30CA denotes bi-directional configuration, meaning the device functions identically in both polarities and has no anode/cathode distinction. This enables symmetric protection of AC signals or floating DC buses without orientation constraints during PCB assembly. Unlike unidirectional variants (e.g., 1KSMB30A), the 1KSMB30CA does not feature a cathode band marking.
What is the maximum clamping voltage of 1KSMB30CA and under what test condition?
The maximum clamping voltage of 1KSMB30CA is 41.4 V, measured at a peak pulse current (IPP) of 24.2 A using the standardized 10/1000 µs double-exponential waveform per ANSI/IEEE C62.35. This value ensures downstream 3.3 V, 5 V, and 12 V circuits remain within safe operating limits during surge events.
Is 1KSMB30CA suitable for automotive applications requiring ISO 7637-2 compliance?
Yes, 1KSMB30CA meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements for conducted transients on 12 V and 24 V vehicle electrical systems. Its 1000 W peak pulse power rating and −55 °C to +175 °C junction temperature range make it appropriate for engine bay and body control module deployments.
What is the moisture sensitivity level (MSL) of 1KSMB30CA and how does it affect assembly?
The 1KSMB30CA has moisture sensitivity level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30 °C/60% RH and requires no baking prior to reflow soldering. This eliminates pre-conditioning steps, reduces floor life management overhead, and supports uninterrupted SMT line operation.
How does the thermal resistance of 1KSMB30CA impact its power dissipation capability?
With RθJL = 20 °C/W and RθJA = 100 °C/W, the 1KSMB30CA can dissipate up to 5 W continuously at 25 °C ambient when properly mounted on ≥1 cm² of 1 oz copper. Derating is required above 25 °C per the published pulse derating curve, preserving 1000 W surge capability only for non-repetitive events.
1KSMB30CA 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):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.4V
- Current - Peak Pulse (10/1000µs):
- 24.2A
- 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)
1KSMB30CA FAQ
1.How can I place an order for 1KSMB30CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB30CA 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 1KSMB30CA reliable?
The price and inventory of 1KSMB30CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB30CA is usually 5 days.
3.What payment methods are accepted for 1KSMB30CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB30CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB30CA?
1KSMB30CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB30CA 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 1KSMB30CA?
For technical support, including 1KSMB30CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB30CA requirements.
6.How does Aetrix verify that 1KSMB30CA is sourced from the original manufacturer or authorized distributors?
All 1KSMB30CA 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 1KSMB30CA meets industry standards.
7.What is the process for return or replacement of 1KSMB30CA?
All 1KSMB30CA units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB30CA, 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 1KSMB30CA part is unused and in its original packaging.
Return procedure for 1KSMB30CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1KSMB30CA Tags
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