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Taiwan Semiconductor Corporation SMB10J20CAH
- Part No.:
- SMB10J20CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J20CAH.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,051
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Product details
Overview
SMB10J20CAH from Taiwan Semiconductor is a bidirectional 1000W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 20V stand-off voltage (VWM), 22.2–24.5V breakdown voltage (VBR @ 1mA), and 32.4V clamping voltage (VC @ 30.9A). It delivers AEC-Q101 qualification and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and inductive switching protection.
For engineers reviewing the SMB10J20CAH datasheet, SMB10J20CAH pinout, SMB10J20CAH application, or SMB10J20CAH equivalent, key selection criteria include bidirectional clamping capability, 1000W peak pulse power rating at 1ms, junction temperature range of –55°C to +175°C, and compliance with automotive ESD/transient immunity standards.
Technical Context
This bidirectional TVS diode uses a glass-passivated junction to achieve fast response time (<1.0ps) and stable clamping under repetitive transients. Its symmetrical avalanche structure enables equal reverse/forward conduction, supporting protection of AC-coupled or floating signal lines without polarity concerns.
The device operates within a –55°C to +175°C junction temperature range and features RθJA = 100°C/W and RθJL = 20°C/W thermal resistance, enabling reliable performance in high-ambient automotive engine bay or industrial control environments with limited heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse working voltage before clamping initiates |
| VBR min/max | 22.2 V / 24.5 V - Breakdown occurs between these voltages at 1 mA test current |
| VC @ IPPM | 32.4 V - Clamped voltage across terminals at 30.9 A peak pulse current |
| PPK | 1000 W - Peak pulse power dissipation capability per 1 ms 10/1000 µs waveform |
| TJ max | +175 °C - Maximum allowable junction temperature for sustained operation |
| Configuration | Bidirectional - Symmetrical clamping for AC or polarity-agnostic protection |
| Standards | AEC-Q101 qualified; ISO 7637-2 Pulse 1/2a/2b/3a/3b compliant |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking for unidirectional variants; SMB10J20CAH is bidirectional and marked with "LVC" code - no polarity band required. Matte tin-plated leads, UL 94V-0 molding compound, 0.110 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals function identically - bidirectional clamping allows connection without orientation check |
| Case (body) | Thermal and mechanical interface | DO-214AA body provides 20°C/W junction-to-lead thermal path; requires minimum 25 mm² copper pad for rated PPK |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under high-humidity or high-bias stress conditions |
| ISO 7637-2 compliance | Guarantees robustness against real-world automotive transients: load dump (Pulse 5), inductive switch-off (Pulse 1/2b), and EFT (Pulse 3b) |
| Moisture sensitivity level 1 | Enables direct placement without baking - compatible with standard SMT reflow profiles per J-STD-020 |
Applications
| Automotive Lighting Systems | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and CAN transceivers from load-dump spikes during headlamp or DRL module power cycling. IC Role / Device Role: Bidirectional clamping element placed across power rail and ground near sensitive inputs. Use Value: Limits voltage to ≤32.4 V during 1000 W transients, preventing latch-up or gate oxide damage in 3.3 V/5 V logic interfaces. | Use Scenario: Safeguarding 24 V digital input modules against inductive kickback from solenoid or relay coils. IC Role / Device Role: Primary transient shunt on field-side terminals before optocoupler or Schmitt trigger input stage. Use Value: Withstands ≥30.9 A peak surge while maintaining <1 µA leakage at 20 V, ensuring low false-trigger risk in high-noise factory environments. |
| Automotive Body Control Modules | Consumer Appliance Motor Drives |
Use Scenario: Shielding LIN bus transceivers and microcontroller GPIOs from ESD and coupled noise in door module PCBs. IC Role / Device Role: Localized TVS on each LIN line and power entry point, leveraging bidirectional symmetry for simplified layout. Use Value: Sub-1 ps response ensures clamping activation before ESD pulse edge reaches IC pins; AEC-Q101 grade confirms reliability over 15-year vehicle life. | Use Scenario: Suppressing commutation spikes in BLDC motor inverters used in washing machines or HVAC blowers. IC Role / Device Role: DC bus rail protector between bridge rectifier output and inverter H-bridge input capacitors. Use Value: 1000 W rating handles repetitive 8.3 ms half-sine surges up to 100 A (IFSM), preventing MOSFET avalanche failure during startup/stall events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ20CA | Same DO-214AC (SMA) package; lower PPK (400 W); VBR 22.2–24.5 V; VC = 32.4 V @ 12.3 A | Not AEC-Q101 qualified; lacks ISO 7637-2 certification | Acceptable for non-automotive industrial use where 400 W pulse energy suffices and qualification is not mandated |
| ON Semiconductor 1.5KE20CA | Through-hole DO-15 package; PPK = 1500 W; VBR = 22.2–24.5 V; VC = 32.4 V @ 46.5 A | Requires PCB through-hole mounting; higher thermal mass but incompatible with automated SMT lines | Preferred when higher pulse energy margin is needed and board space/layout permits leaded assembly |
Compared with SMAJ20CA and 1.5KE20CA, SMB10J20CAH uniquely combines AEC-Q101 qualification, ISO 7637-2 compliance, surface-mount DO-214AA packaging, and 1000 W pulse rating - making it the only drop-in SMT solution for automotive-grade bidirectional rail protection requiring full standard conformance.
Availability
SMB10J20CAH is available at Aetrix Electronics and suitable for automotive lighting systems, industrial PLC I/O protection, and body control module designs requiring stable component supply, AEC-Q101 compliance, and repeatable 1000 W transient suppression performance.
Supply support for SMB10J20CAH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power MOSFETs for automotive and industrial markets.
The SMB10JxxCAH series was designed specifically for AEC-Q101-compliant, surface-mount transient protection in harsh automotive environments - emphasizing low-profile packaging, high-reliability passivation, and standardized ISO 7637-2 pulse immunity.
FAQ
What does the 'CAH' suffix indicate in SMB10J20CAH?
The 'CAH' suffix denotes a bidirectional configuration with AEC-Q101 qualification and halogen-free construction. Unlike unidirectional 'AH' variants, SMB10J20CAH provides symmetrical clamping in both polarities - essential for protecting AC-coupled signals or floating buses without polarity constraints. This designation is confirmed in TSC's ordering information and electrical specifications table.
Is SMB10J20CAH suitable for ISO 7637-2 Pulse 5 (load dump) protection?
No - SMB10J20CAH is rated for ISO 7637-2 Pulses 1, 2a, 2b, 3a, and 3b only. Pulse 5 (load dump) requires higher energy handling (≥400 V, >100 ms duration) beyond its 1000 W / 1 ms rating. For Pulse 5, a dedicated load-dump suppressor like TSC's SMB5.0AT3G or an external regulator stage is required alongside SMB10J20CAH.
What is the maximum steady-state power dissipation (PD) for SMB10J20CAH?
The maximum steady-state power dissipation (PD) for SMB10J20CAH is 5 W at TA = 25°C, derating linearly above that ambient temperature per the pulse derating curve in the datasheet. This value reflects continuous DC or low-frequency power handling - distinct from its 1000 W peak pulse rating, which applies only to short-duration transients (≤1 ms).
Does SMB10J20CAH require orientation during PCB placement?
No - SMB10J20CAH is a bidirectional TVS diode with symmetrical electrical characteristics; its DO-214AA package has no polarity marking or cathode band. Placement orientation does not affect functionality, simplifying automated pick-and-place and reducing assembly errors compared to unidirectional variants like SMB10J20AH.
What is the moisture sensitivity level (MSL) and reflow profile compatibility for SMB10J20CAH?
SMB10J20CAH has MSL Level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH and placed directly into standard lead-free reflow profiles (peak ≤260°C) without pre-baking. This eliminates moisture-related popcorning risk and supports high-yield SMT manufacturing without special handling requirements.
SMB10J20CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMB10J
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 30.9A
- 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)
SMB10J20CAH FAQ
1.How can I place an order for SMB10J20CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J20CAH 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 SMB10J20CAH reliable?
The price and inventory of SMB10J20CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J20CAH is usually 5 days.
3.What payment methods are accepted for SMB10J20CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J20CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J20CAH?
SMB10J20CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J20CAH 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 SMB10J20CAH?
For technical support, including SMB10J20CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J20CAH requirements.
6.How does Aetrix verify that SMB10J20CAH is sourced from the original manufacturer or authorized distributors?
All SMB10J20CAH 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 SMB10J20CAH meets industry standards.
7.What is the process for return or replacement of SMB10J20CAH?
All SMB10J20CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J20CAH, 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 SMB10J20CAH part is unused and in its original packaging.
Return procedure for SMB10J20CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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