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Taiwan Semiconductor Corporation 1KSMB100CAH
- Part No.:
- 1KSMB100CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB100CAH.pdf
- Description:
- TVS DIODE 85.5VWM 137VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,031
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Product details
Overview
1KSMB100CAH from Taiwan Semiconductor is a bi-directional 1000W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with breakdown voltage 95–105 V, stand-off voltage 85.5 V, clamping voltage 137 V at 7.3 A, and AEC-Q101 qualification for automotive-grade surge protection.
For engineers reviewing the 1KSMB100CAH datasheet, 1KSMB100CAH pinout, 1KSMB100CAH application, or 1KSMB100CAH equivalent, this part delivers certified bidirectional ESD/ISO 7637-2 pulse immunity for high-reliability automotive power line and signal line protection where precise 100V standoff and sub-1ps response are required.
Technical Context
The 1KSMB100CAH is a single-die, bi-directional TVS diode designed to clamp fast transients on symmetric signal or power lines without polarity dependence. Its glass-passivated junction ensures stable breakdown and low leakage (<1 µA @ 85.5 V), while meeting ISO 7637-2 Pulse 1/2a/2b/3a/3b waveforms.
Thermal performance is defined by RθJL = 20°C/W and RθJA = 100°C/W, supporting operation from –55°C to +175°C junction temperature. The CAH suffix explicitly denotes bi-directional configuration, distinguishing it from unidirectional AH variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 95 V / 105 V - Confirmed breakdown range at 1 mA test current; defines minimum clamping threshold under surge conditions. |
| VWM | 85.5 V - Maximum continuous reverse operating voltage; sets safe DC/AC working limit before conduction begins. |
| VC @ IPP | 137 V @ 7.3 A - Clamped voltage during 10/1000 µs surge; determines peak stress imposed on protected downstream circuitry. |
| PPPSM | 1000 W - Peak pulse power rating; specifies maximum transient energy absorption capability per single event. |
| TJ max | +175°C - Maximum junction temperature; enables use in under-hood automotive environments with minimal derating. |
| Response time | <1.0 ps - Measured from 0 V to VBR min; ensures suppression of nanosecond-scale ESD and EFT events before IC damage occurs. |
| Configuration | Bi-directional - Symmetric clamping for AC-coupled or floating lines; no external polarity management required. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, matte tin-plated leads, polarity marked by cathode band (not functional in bi-directional configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Common terminal pair | Interchangeable terminals; identical clamping behavior in both directions; no functional anode/cathode distinction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD; supports PPAP documentation. |
| ISO 7637-2 compliance | Tested against Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT); suitable for 12 V/24 V vehicle networks. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal/humidity stress; eliminates risk of junction corrosion in harsh environments. |
| Moisture sensitivity level 1 | No floor life limitation or baking requirement prior to reflow; compatible with standard SMT assembly without special handling. |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive; supports environmentally compliant manufacturing and end-of-life recycling. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN/CAN bus power rails and microcontroller supply inputs from load dump and jump-start surges in passenger vehicles. IC Role / Device Role: Primary bidirectional clamping element placed between battery rail and LDO/regulator input. Use Value: Limits transient voltage to ≤137 V during 10/1000 µs pulses up to 7.3 A, preventing regulator latch-up or MOSFET gate oxide failure. |
Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors in factory automation PLC modules exposed to relay coil flyback. IC Role / Device Role: Secondary-level TVS across differential sensor lines (e.g., 4–20 mA loop or RS-485) to absorb inductive switching spikes. Use Value: Maintains signal integrity by clamping transients within ±137 V while adding <1 pF junction capacitance at 0 V bias. |
| LED Driver Input Stage Protection | ESD-Sensitive Communication Port Protection |
Use Scenario: Shielding constant-current LED driver ICs from 12 V automotive supply transients during ignition and alternator regulation faults. IC Role / Device Role: Front-end TVS on input capacitor node, upstream of buck controller and gate drivers. Use Value: Absorbs 1000 W peak pulses without degradation, preserving driver reliability over 15+ year vehicle service life. |
Use Scenario: Hardening USB or UART debug ports on embedded control boards against human-body-model (HBM) ESD events during field servicing. IC Role / Device Role: Bi-directional shunt device across VCC-GND and signal-GND pairs to divert >8 kV contact discharge energy. Use Value: Sub-1 ps response captures ESD rise time before internal IC protection diodes activate, reducing cumulative damage risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ100CA | Same DO-214AA package, 1000 W rating, but VBR = 111–123 V and VC = 165 V @ 6.1 A; higher clamping voltage. | Less effective for systems requiring strict ≤140 V clamping headroom; better suited for 24 V industrial rails than 12 V automotive. | Select when higher VBR margin is needed to avoid false triggering near nominal 100 V system peaks. |
| 1.5KE100CA | Through-hole DO-201 package, same 100 V VBR range, but larger footprint and lower thermal efficiency (RθJA ≈ 150°C/W). | Not suitable for high-density SMT layouts; requires manual or wave soldering; limited to non-automated or legacy designs. | Choose only if board redesign is impractical and existing through-hole footprint must be retained. |
Compared with SMBJ100CA and 1.5KE100CA, the 1KSMB100CAH offers tighter VBR tolerance (95–105 V vs. 111–123 V), lower clamping (137 V vs. 165 V), and optimized SMT manufacturability-making it the preferred choice for space-constrained, AEC-Q101-compliant 12 V automotive power rail protection.
Availability
1KSMB100CAH is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface hardening, and LED driver input stage surge suppression requiring stable component supply and full AEC-Q101 traceability.
Supply support for 1KSMB100CAH 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, and rectifiers with global automotive and industrial certifications.
The 1KSMB series was developed specifically for AEC-Q101-compliant transient suppression in automotive electrical systems, emphasizing robustness, tight parametric control, and seamless SMT integration for modern vehicle ECUs.
FAQ
What does the 'CAH' suffix indicate in 1KSMB100CAH?
The 'CAH' suffix in 1KSMB100CAH explicitly denotes a bi-directional configuration. Unlike unidirectional 'AH' variants, the 1KSMB100CAH provides symmetrical clamping for both positive and negative transients without polarity sensitivity-critical for protecting AC-coupled or floating signal lines and dual-rail power domains.
Is 1KSMB100CAH suitable for 24 V commercial vehicle applications?
Yes, the 1KSMB100CAH is rated for VWM = 85.5 V and VC = 137 V, providing sufficient margin above typical 24 V system peaks (≤32 V) and load dump transients (up to 60 V). Its AEC-Q101 qualification and ISO 7637-2 Pulse 1 compliance confirm suitability for heavy-duty truck and bus electronic modules.
How does the junction capacitance of 1KSMB100CAH affect high-speed data lines?
The 1KSMB100CAH exhibits ≤100 pF junction capacitance at 0 V bias (per Fig.5), making it unsuitable for USB 2.0 or HDMI signal lines but appropriate for lower-speed interfaces like LIN, CAN, RS-485, or analog sensor outputs where bandwidth is below 10 MHz and signal integrity is preserved under transient conditions.
Can 1KSMB100CAH replace 1KSMB100AH in a design?
No-1KSMB100AH is unidirectional and requires correct polarity placement, whereas 1KSMB100CAH is bi-directional with interchangeable terminals. Swapping them without layout review risks incorrect clamping behavior on negative transients; the 1KSMB100CAH may be used in place of 1KSMB100AH only if polarity independence is confirmed as beneficial in the target circuit.
What is the maximum allowable PCB trace length when using 1KSMB100CAH for ESD protection?
For optimal ESD performance, PCB traces to the 1KSMB100CAH should be kept under 5 mm in length and routed directly between the protected node and ground plane. Longer traces add inductance that degrades sub-nanosecond response; the 1KSMB100CAH's <1 ps intrinsic response is only fully realized with low-inductance layout practices.
1KSMB100CAH 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):
- 85.5V
- Voltage - Breakdown (Min):
- 95V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 7.3A
- 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)
1KSMB100CAH FAQ
1.How can I place an order for 1KSMB100CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB100CAH 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 1KSMB100CAH reliable?
The price and inventory of 1KSMB100CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB100CAH is usually 5 days.
3.What payment methods are accepted for 1KSMB100CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB100CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB100CAH?
1KSMB100CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB100CAH 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 1KSMB100CAH?
For technical support, including 1KSMB100CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB100CAH requirements.
6.How does Aetrix verify that 1KSMB100CAH is sourced from the original manufacturer or authorized distributors?
All 1KSMB100CAH 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 1KSMB100CAH meets industry standards.
7.What is the process for return or replacement of 1KSMB100CAH?
All 1KSMB100CAH units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB100CAH, 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 1KSMB100CAH part is unused and in its original packaging.
Return procedure for 1KSMB100CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1KSMB100CAH Tags
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