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Taiwan Semiconductor Corporation SMB10J20AH
- Part No.:
- SMB10J20AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J20AH.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,442
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Product details
Overview
SMB10J20AH from Taiwan Semiconductor is a unidirectional 1000W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 20V stand-off voltage (VWM), 22.2–24.5V breakdown voltage (VBR) at 1mA, and 32.4V clamping voltage (VC) at 30.9A peak pulse current. It delivers AEC-Q101 qualification and ISO 7637-2 compliance for automotive load-dump and ESD protection.
For engineers reviewing the SMB10J20AH datasheet, SMB10J20AH pinout, SMB10J20AH application, or SMB10J20AH equivalent, key selection criteria include unidirectional polarity, 1000W peak pulse power rating, 175°C max junction temperature, glass-passivated junction, and DO-214AA mechanical compatibility with automated SMT placement.
Technical Context
The SMB10J20AH is a single-die, unidirectional TVS diode optimized for fast transient suppression in automotive and industrial power rails. Its sub-1ps response time and low clamping ratio (VC/VBR ≈ 1.42) ensure robust protection of downstream ICs during ISO 7637-2 Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (capacitive coupling) events.
Thermally, it features 20°C/W junction-to-lead resistance and operates across –55°C to +175°C, enabling use in under-hood environments. The matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse working voltage before clamping begins |
| VBR @ IT=1mA | 22.2–24.5 V - Verified breakdown threshold ensuring reliable turn-on during transients |
| VC @ IPPM=30.9A | 32.4 V - Clamped voltage limiting stress on protected ICs during 10/1000μs surge |
| PPK | 1000 W - Peak pulse power handling per non-repetitive 1ms waveform (Fig. 3) |
| TJ max | +175 °C - Enables operation in high-temperature automotive engine compartments |
| Response time | <1.0 ps - Sub-picosecond junction response ensures suppression before sensitive logic is damaged |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 0.110g mass and UL 94V-0 molding compound |
Pinout & Package
DO-214AA (SMB) package: cathode-banded, two-terminal unidirectional device. Cathode band denotes terminal 1 (cathode); anode is terminal 2. Matte tin-plated leads comply with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased output node | Connected to protected circuit's power rail; conducts during overvoltage to shunt energy to ground |
| Anode | Reference/ground return path | Typically tied to system ground plane; completes clamping current path during transient events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass-passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives |
| ISO 7637-2 compliance | Meets Pulse 1/2a/2b/3a/3b immunity requirements for 12V and 24V vehicle electrical systems |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly lines without dry-pack handling |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for eco-conscious manufacturing |
Applications
| Automotive Power Rail Protection | LED Lighting Driver Protection |
|---|---|
Use Scenario: Protecting MCU power inputs and CAN transceiver VCC pins against load dump and jump-start surges in 12V vehicle systems. IC Role / Device Role: Unidirectional TVS placed between battery rail and local regulator input. Use Value: Limits clamped voltage to 32.4V during 1000W transients, preventing damage to 3.3V/5V logic and analog front-ends. | Use Scenario: Safeguarding constant-current LED driver ICs from ESD and switching noise in headlamp modules. IC Role / Device Role: Parallel-connected TVS across driver IC supply pins to clamp fast-rising transients. Use Value: Sub-1ps response ensures suppression before internal gate oxides rupture; 175°C rating supports sealed lamp housing operation. |
| Industrial Sensor Interface Protection | Power Supply Input Stage Clamp |
Use Scenario: Shielding 4–20mA transmitter signal conditioning circuits from field-induced EFT bursts. IC Role / Device Role: TVS installed at sensor PCB entry point, upstream of precision op-amps and ADCs. Use Value: 32.4V clamping prevents saturation or latch-up in rail-to-rail input amplifiers operating from ±15V supplies. | Use Scenario: Front-end surge suppression for AC/DC adapter secondary-side 24V outputs feeding PLC I/O modules. IC Role / Device Role: Primary overvoltage clamp on regulated DC bus before DC-DC converters and microcontrollers. Use Value: 1000W rating handles repetitive 1ms surges per IEC 61000-4-5 Level 3; DO-214AA footprint enables compact layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ20A | Same DO-214AC (SMA) package; 20V VWM, 32.4V VC @ 30.9A, but rated at 400W PPK | Lower power handling limits use to <400W transients; unsuitable for ISO 7637-2 Pulse 1 (1000W) | Select SMB10J20AH when full 1000W automotive load-dump immunity is required |
| ON Semiconductor 1.5SMC20A | DO-214AB (SMC) package; 20V VWM, 32.4V VC @ 30.9A, 1500W PPK, but 1.5x larger footprint and 0.33g mass | Higher power margin but incompatible with SMB-reflow profiles and space-constrained layouts | Choose SMB10J20AH for DO-214AA footprint constraints and AEC-Q101 validation |
Compared with SMAJ20A and 1.5SMC20A, SMB10J20AH uniquely balances 1000W surge capability, AEC-Q101 qualification, and DO-214AA size-making it optimal for automotive body control modules and compact industrial sensors where thermal derating and board area are critical.
Availability
SMB10J20AH is available at Aetrix Electronics and suitable for automotive electronics, LED lighting systems, and industrial sensor interfaces requiring stable component supply, AEC-Q101 compliance, and consistent DO-214AA packaging.
Supply support for SMB10J20AH 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, serving automotive, industrial, and consumer markets since 1979.
The SMB10JxxAH series is part of TSC's AEC-Q101-qualified TVS portfolio, engineered specifically for high-reliability transient suppression in harsh automotive environments and demanding industrial power systems.
FAQ
What is the polarity configuration of SMB10J20AH?
SMB10J20AH is a unidirectional TVS diode, indicated by the absence of "C" in the suffix (e.g., vs. SMB10J20CAH). It features a cathode band marking and conducts only during reverse overvoltage events, making it ideal for DC power rail protection where polarity is fixed.
Does SMB10J20AH meet automotive qualification standards?
Yes, SMB10J20AH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements. Its 175°C maximum junction temperature and glass-passivated junction support under-hood deployment in passenger and commercial vehicles.
What is the clamping voltage of SMB10J20AH at its rated peak pulse current?
The SMB10J20AH has a maximum clamping voltage (VC) of 32.4 V at 30.9 A peak pulse current (IPPM), measured under the 10/1000 μs waveform per Fig. 3 in the datasheet. This ensures protected ICs experience minimal overvoltage stress during standardized surge events.
Can SMB10J20AH be used in bidirectional applications?
No-SMB10J20AH is unidirectional only. For bidirectional protection, the functionally matched SMB10J20CAH must be selected. Using SMB10J20AH in AC or reversible-polarity circuits risks forward conduction and failure during normal operation.
What is the moisture sensitivity level (MSL) and reflow profile compatibility of SMB10J20AH?
SMB10J20AH is rated MSL Level 1 per J-STD-020, meaning it may be stored indefinitely at ambient conditions and requires no baking prior to reflow. It is fully compatible with standard lead-free (SnAgCu) reflow profiles up to 260°C peak temperature.
SMB10J20AH 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMB10J20AH FAQ
1.How can I place an order for SMB10J20AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J20AH 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 SMB10J20AH reliable?
The price and inventory of SMB10J20AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J20AH is usually 5 days.
3.What payment methods are accepted for SMB10J20AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J20AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J20AH?
SMB10J20AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J20AH 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 SMB10J20AH?
For technical support, including SMB10J20AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J20AH requirements.
6.How does Aetrix verify that SMB10J20AH is sourced from the original manufacturer or authorized distributors?
All SMB10J20AH 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 SMB10J20AH meets industry standards.
7.What is the process for return or replacement of SMB10J20AH?
All SMB10J20AH units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J20AH, 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 SMB10J20AH part is unused and in its original packaging.
Return procedure for SMB10J20AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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