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Taiwan Semiconductor Corporation 1KSMB36CAH
- Part No.:
- 1KSMB36CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1KSMB36CAH.pdf
- Description:
- TVS DIODE 30.8VWM 49.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,145
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Product details
Overview
1KSMB36CAH from Taiwan Semiconductor is a bi-directional 1000W surface-mount Transient Voltage Suppressor (TVS) in DO-214AA (SMB) package, with breakdown voltage 34.2–37.8 V, stand-off voltage 30.8 V, and clamping voltage 49.9 V at 20.0 A peak pulse current. It protects automotive and industrial circuits against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1KSMB36CAH datasheet, 1KSMB36CAH pinout, 1KSMB36CAH application, or 1KSMB36CAH equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance values, moisture sensitivity level (J-STD-020 Level 1), and bidirectional clamping behavior critical for ESD and load-dump protection design.
Technical Context
The 1KSMB36CAH employs a glass-passivated silicon junction optimized for fast transient response (<1.0 ps rise time from 0 V to VBR(min)) and robust clamping under 10/1000 µs surge waveforms. Its bi-directional configuration enables symmetrical protection of AC-coupled or floating signal lines without polarity dependency.
Designed per ANSI/IEEE C62.35, it delivers 1000 W non-repetitive peak pulse power with RθJL = 20 °C/W and RθJA = 100 °C/W, supporting operation from –55 °C to +175 °C junction temperature and meeting JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 34.2 V / 37.8 V - Ensures reliable triggering above system operating voltage while maintaining margin against false clamping |
| VWM | 30.8 V - Maximum continuous reverse working voltage compatible with 24 V nominal automotive systems |
| VC @ IPP = 20.0 A | 49.9 V - Clamped voltage during 10/1000 µs surge limits stress on downstream ICs to safe levels |
| PPPSM | 1000 W - Sustains high-energy transients like ISO 7637-2 Pulse 5a (load dump) without failure |
| IPP | 20.0 A - Peak surge current capacity validated for repetitive surge testing per AEC-Q101 stress profiles |
| TJ(max) | +175 °C - Enables placement near heat-generating components in engine control units and power modules |
| Package | DO-214AA (SMB) - Surface-mount footprint compatible with automated assembly and IPC-7351B standard land patterns |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode band marking for unidirectional variants; 1KSMB36CAH is bi-directional and marked with "N10R", no polarity band required. Weight: 0.110 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional terminal pair | No polarity distinction - connects across protected line and ground (or between differential lines) without orientation constraints |
| Case | Non-electrical mechanical interface | Plastic body provides insulation and mechanical anchoring; no thermal or electrical connection to PCB copper pour required |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including powertrain, body control, and ADAS modules per stress test requirements |
| Glass passivated junction | Enhances long-term reliability and leakage stability under humidity and thermal cycling vs. epoxy-passivated alternatives |
| ISO 7637-2 compliance | Guarantees immunity to standardized automotive transients (Pulse 1, 2a, 2b, 3a, 3b) without external filtering |
| J-STD-020 Level 1 | Enables direct placement on PCB without baking or special handling prior to reflow soldering |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU for environmentally constrained supply chains |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus or 24 V supply rail in body control modules from load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed between power rail and chassis ground to clamp transients before they reach LDOs and microcontrollers. Use Value: Limits clamped voltage to 49.9 V during 20 A surge, preventing latch-up or permanent damage to 3.3 V/5 V logic downstream. | Use Scenario: Safeguarding analog inputs of PLC analog I/O modules exposed to field wiring induced EFT and lightning-induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS on each channel input to shunt fast transients before reaching precision op-amps and ADC front-ends. Use Value: Sub-1 ps response ensures clamping initiates before transient edge propagates into signal chain, preserving measurement integrity. |
| LED Driver Output Protection | RS-485 Transceiver Bus Protection |
Use Scenario: Shielding constant-current LED driver outputs in automotive lighting from inductive kickback during switch-off. IC Role / Device Role / Timing Role: Bi-directional TVS across output terminals to absorb energy from inductive loads without polarity concerns. Use Value: 1000 W peak power rating handles repeated switching events in headlamp and DRL applications without degradation. | Use Scenario: Protecting RS-485 transceivers in factory automation networks from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS placed across differential bus lines (A/B) and to ground to suppress common-mode and differential-mode transients. Use Value: Symmetrical clamping maintains differential signal integrity while limiting common-mode overvoltage to <50 V, within transceiver absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | Same DO-214AA package, identical VBR (34.2–37.8 V), but lower PPPSM = 600 W and higher VC = 58.1 V at 10.3 A | Not suitable for ISO 7637-2 Pulse 5a (load dump); limited to lower-energy ESD and EFT scenarios | Select only when surge energy is constrained and board space allows larger parallel TVS array |
| 1.5KE36CA | Through-hole DO-15 package, same VBR, PPPSM = 1500 W, VC = 49.9 V at 30.1 A, but incompatible with SMT assembly | Requires manual or wave soldering; unsuitable for high-density automotive PCBs | Use only for prototyping or legacy through-hole designs where rework tolerance outweighs production efficiency |
Compared with SMBJ36CA and 1.5KE36CA, the 1KSMB36CAH uniquely balances 1000 W surge capability, SMT compatibility, AEC-Q101 qualification, and bi-directional symmetry-making it optimal for volume automotive and industrial control applications requiring zero-layout redesign and full standard compliance.
Availability
1KSMB36CAH is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, LED driver outputs, and RS-485 communication lines requiring stable component supply across multi-year production cycles.
Supply support for 1KSMB36CAH 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 automotive, industrial, and consumer markets.
The 1KSMBx series was developed specifically for AEC-Q101-compliant transient suppression in harsh-environment automotive electronics, emphasizing high surge robustness, tight parameter tolerances, and surface-mount manufacturability.
FAQ
What does the "CAH" suffix indicate in 1KSMB36CAH?
The "CAH" suffix denotes bi-directional configuration. Unlike unidirectional variants (e.g., 1KSMB36AH), the 1KSMB36CAH has symmetrical breakdown characteristics and no cathode marking-enabling use across AC signals, differential buses, or floating rails without polarity concern. This is confirmed in TSC's ordering information note: "For Bidirectional use CAH suffix".
Is 1KSMB36CAH qualified for automotive applications?
Yes, 1KSMB36CAH is AEC-Q101 qualified per the official datasheet (Version A2102). It undergoes stress testing including temperature cycling, highly accelerated life testing (HALT), and surge endurance per automotive reliability standards-making it suitable for engine control units, body electronics, and ADAS subsystems where functional safety and long-term stability are mandatory.
What is the maximum clamping voltage of 1KSMB36CAH and at what current?
The maximum clamping voltage (VC) of 1KSMB36CAH is 49.9 V, measured at a peak pulse current (IPP) of 20.0 A under 10/1000 µs waveform conditions. This value is specified in the Electrical Specifications table on page 2 of the TSC datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Can 1KSMB36CAH be used in place of a unidirectional TVS like 1KSMB36AH?
No-1KSMB36CAH is bi-directional and lacks polarity marking, while 1KSMB36AH is unidirectional with a cathode band. Substituting them requires verifying circuit topology: 1KSMB36CAH is appropriate for AC, differential, or floating nodes; 1KSMB36AH is required for DC rails where forward conduction must be blocked. Interchange alters protection behavior and may compromise system reliability.
What is the moisture sensitivity level (MSL) of 1KSMB36CAH and how does it affect assembly?
1KSMB36CAH has Moisture Sensitivity Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30 °C/60% RH and subjected to standard reflow profiles (including lead-free) without pre-baking. This eliminates handling restrictions and supports seamless integration into high-volume SMT lines without yield loss from popcorning or delamination.
1KSMB36CAH 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):
- 30.8V
- Voltage - Breakdown (Min):
- 34.2V
- Voltage - Clamping (Max) @ Ipp:
- 49.9V
- Current - Peak Pulse (10/1000µs):
- 20A
- 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)
1KSMB36CAH FAQ
1.How can I place an order for 1KSMB36CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for 1KSMB36CAH 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 1KSMB36CAH reliable?
The price and inventory of 1KSMB36CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1KSMB36CAH is usually 5 days.
3.What payment methods are accepted for 1KSMB36CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1KSMB36CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1KSMB36CAH?
1KSMB36CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1KSMB36CAH 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 1KSMB36CAH?
For technical support, including 1KSMB36CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1KSMB36CAH requirements.
6.How does Aetrix verify that 1KSMB36CAH is sourced from the original manufacturer or authorized distributors?
All 1KSMB36CAH 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 1KSMB36CAH meets industry standards.
7.What is the process for return or replacement of 1KSMB36CAH?
All 1KSMB36CAH units undergo pre-shipment inspection (PSI). If there is an issue with 1KSMB36CAH, 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 1KSMB36CAH part is unused and in its original packaging.
Return procedure for 1KSMB36CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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