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Taiwan Semiconductor Corporation SMA6J20AH
- Part No.:
- SMA6J20AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J20AH.pdf
- Description:
- TVS DIODE 20VWM 31.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,802
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Product details
Overview
SMA6J20AH from Taiwan Semiconductor is a 600W surface-mount transient voltage suppressor (TVS) diode with a 22.2–24.5 V breakdown voltage, 31.4 V clamping voltage at 19.1 A peak pulse current, and DO-214AC (SMA) package. It provides AEC-Q101 qualification, ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b), and 1.0 ps typical response time for automotive power rail protection.
For engineers reviewing the SMA6J20AH datasheet, SMA6J20AH pinout, SMA6J20AH application, or SMA6J20AH equivalent, key selection factors include its 20 V working stand-off voltage, 1.0 µA max reverse leakage at VWM, 175 °C junction temperature rating, glass-passivated junction, and suitability for on-board DC/DC converters and SMPS input stages requiring robust ESD/surge immunity.
Technical Context
The SMA6J20AH operates as a unidirectional avalanche diode configured in a single-die DO-214AC package with cathode band polarity marking. Its clamping behavior follows standardized 10/1000 µs waveform testing per IEC 61000-4-5 and ISO 7637-2, delivering 31.4 V maximum clamping voltage at 19.1 A peak impulse current.
It sustains 4 W steady-state power dissipation and 50 A non-repetitive forward surge current (8.3 ms half-sine), with thermal performance validated across –55 °C to +175 °C operating junction range and moisture sensitivity level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 22.2 V / 24.5 V - guaranteed avalanche initiation range at 1 mA test current; defines minimum overvoltage threshold before conduction |
| VWM | 20 V - maximum continuous reverse operating voltage; system must stay below this to avoid leakage or premature clamping |
| VC@IPPM | 31.4 V - clamped voltage during 19.1 A 10/1000 µs surge; determines protected circuit's worst-case overvoltage exposure |
| PPPM | 600 W - peak pulse power handling under standard 10/1000 µs waveform; defines transient energy absorption capacity |
| TJ max | 175 °C - maximum allowable junction temperature; sets thermal derating boundary for high-ambient or high-duty-cycle applications |
| IR@VWM | 1.0 µA - reverse leakage at rated stand-off voltage; ensures minimal quiescent power loss and signal integrity in high-impedance nodes |
Pinout & Package
DO-214AC (SMA) package: surface-mount, molded plastic case with matte tin-plated leads, polarity indicated by cathode band, UL 94V-0 rated compound, 0.060 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side reference | Connected to ground or lower-potential rail in unidirectional TVS configuration; forms return path during clamping |
| Cathode | Reverse-biased terminal / high-side connection | Connected to protected line (e.g., 24 V rail); avalanche conduction initiates here when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock per stress test requirements |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal stress and humidity exposure |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Guarantees survivability against real-world automotive transients including load dump, inductive switching, and battery disconnect events |
| 1.0 ps typical response time | Enables suppression of fast-rising ESD and lightning-induced surges before sensitive downstream components experience overstress |
| Moisture sensitivity level 1 | Permits unlimited floor life and standard reflow without baking, simplifying SMT assembly logistics |
Applications
| Automotive Power Rail Protection | Industrial DC/DC Converter Input |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between power rail and chassis ground to clamp overvoltage spikes. Use Value: Limits rail voltage to ≤31.4 V during 19.1 A surges, preventing damage to MCU power supplies and CAN transceivers. | Use Scenario: Safeguarding isolated DC/DC converter primary-side inputs in factory automation controllers. IC Role / Device Role / Timing Role: Standoff protector absorbing repetitive switching noise and accidental 24 V line reversals. Use Value: Maintains 20 V working stand-off while suppressing >600 W transients, enabling compact layout without external snubbers. |
| LED Driver Power Stage | Telecom Power Supply Input |
Use Scenario: Shielding constant-current LED driver ICs from inductive kickback in vehicle lighting modules. IC Role / Device Role / Timing Role: Fast-response shunt device across MOSFET drain-source or supply rail to absorb flyback energy. Use Value: 1.0 ps response ensures clamping activation before LED string or driver FET suffers avalanche failure. | Use Scenario: Front-end surge protection for 24 V telecom power distribution boards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS in series with fuse and common-mode choke on DC input bus. Use Value: 600 W peak power rating handles IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J20A | No AEC-Q101 qualification; identical electrical specs and DO-214AC package | Not suitable for automotive production; acceptable for industrial prototypes or cost-sensitive non-automotive designs | Select SMA6J20A only if automotive qualification is not required and BOM cost reduction is prioritized |
| SMB6J20AH | Same AEC-Q101 rating and VBR/VC specs, but DO-214AA (SMB) package - 2.5 mm wider body and 0.5 mm higher profile | Requires PCB pad revision; offers marginally higher thermal mass but occupies more board area | Choose SMB6J20AH only if existing layout accommodates larger footprint or higher thermal dissipation is needed |
Compared with SMA6J20A and SMB6J20AH, the SMA6J20AH uniquely combines automotive qualification, minimal SMA footprint, and verified ISO 7637-2 Pulse 1–3b immunity-making it optimal for space-constrained automotive modules where qualification and size are jointly critical.
Availability
SMA6J20AH is available at Aetrix Electronics and suitable for automotive electronics, industrial DC/DC converters, and LED lighting systems requiring stable component supply with full AEC-Q101 traceability and ISO 7637-2 compliance.
Supply support for SMA6J20AH 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 SMA6JxAH series was developed specifically to meet stringent automotive transient immunity requirements while maintaining compatibility with high-speed SMT lines-emphasizing AEC-Q101 reliability, glass-passivated junctions, and tight parametric control across voltage grades.
FAQ
What is the clamping voltage of the SMA6J20AH under standard surge conditions?
The SMA6J20AH exhibits a maximum clamping voltage (VC) of 31.4 V when subjected to a 10/1000 µs waveform with a peak pulse current (IPPM) of 19.1 A. This value is measured per IEC 61000-4-5 and ISO 7637-2 standards and represents the upper voltage limit imposed on the protected circuit during surge events. The SMA6J20AH maintains this clamping performance across its specified operating temperature range.
Is the SMA6J20AH suitable for automotive applications?
Yes, the SMA6J20AH is AEC-Q101 qualified and explicitly tested to ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient waveforms-making it suitable for automotive power line protection in ECUs, body control modules, and lighting systems. Its DO-214AC package supports automated placement, and its 175 °C maximum junction temperature aligns with under-hood thermal requirements. The SMA6J20AH meets all mandatory stress tests for automotive-grade discretes.
What is the working stand-off voltage (VWM) of the SMA6J20AH?
The SMA6J20AH has a working stand-off voltage (VWM) of 20 V, meaning it remains in high-impedance blocking mode for reverse voltages up to this level with only 1.0 µA maximum leakage current. This allows safe integration into 24 V nominal automotive and industrial systems where normal operating voltage may reach 28 V during charging transients, provided design margins prevent sustained operation above VWM. The SMA6J20AH's VWM is fixed and not adjustable.
Does the SMA6J20AH have polarity marking, and how is it identified?
Yes, the SMA6J20AH uses a cathode band to indicate polarity-consistent with standard unidirectional TVS diode convention. The band is printed on the DO-214AC (SMA) package body adjacent to the cathode terminal, and the anode is the opposite end. During PCB layout, the cathode must connect to the line being protected (e.g., 24 V rail), and the anode to ground. This marking is visible under standard optical inspection and compatible with automated optical recognition (AOI) systems used in SMT lines.
What packaging and reel quantity is available for the SMA6J20AH?
The SMA6J20AH is supplied in DO-214AC (SMA) package format on tape-and-reel, with 7,500 units per reel. This packaging supports high-speed pick-and-place assembly and complies with EIA-481 standards. The reel includes moisture barrier bagging per J-STD-020 Level 1 requirements, eliminating bake-out prior to reflow. Traceability data-including lot code, date code (YW), and factory code (F)-is marked directly on the device body per TSC's marking diagram for the SMA6J20AH.
SMA6J20AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- SMA6J
- 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:
- 31.4V
- Current - Peak Pulse (10/1000µs):
- 19.1A
- Power - Peak Pulse:
- 600W
- 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-214AC (SMA)
SMA6J20AH FAQ
1.How can I place an order for SMA6J20AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J20AH 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 SMA6J20AH reliable?
The price and inventory of SMA6J20AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J20AH is usually 5 days.
3.What payment methods are accepted for SMA6J20AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J20AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J20AH?
SMA6J20AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J20AH 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 SMA6J20AH?
For technical support, including SMA6J20AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J20AH requirements.
6.How does Aetrix verify that SMA6J20AH is sourced from the original manufacturer or authorized distributors?
All SMA6J20AH 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 SMA6J20AH meets industry standards.
7.What is the process for return or replacement of SMA6J20AH?
All SMA6J20AH units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J20AH, 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 SMA6J20AH part is unused and in its original packaging.
Return procedure for SMA6J20AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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