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Taiwan Semiconductor Corporation SMA6J28AH
- Part No.:
- SMA6J28AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J28AH.pdf
- Description:
- TVS DIODE 28VWM 44VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,679
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Product details
Overview
SMA6J28AH from Taiwan Semiconductor is a 600W surface-mount transient voltage suppressor (TVS) diode with a 28V working stand-off voltage, 31.1–34.4V breakdown range at 1mA, and 44.0V clamping voltage at 13.6A peak pulse current; designed for automotive-grade overvoltage protection in DC/DC converters and power supplies.
For engineers reviewing the SMA6J28AH datasheet, SMA6J28AH pinout, SMA6J28AH application, or SMA6J28AH equivalent, key selection criteria include its AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, DO-214AC (SMA) package, 175°C junction rating, and glass-passivated junction for stable clamping under fast transients.
Technical Context
This unidirectional TVS diode operates as a reverse-biased avalanche clamp, activated when reverse voltage exceeds VBR (31.1–34.4V). Its low dynamic impedance ensures rapid energy diversion during ESD or load-dump events, with sub-1ps response time enabling protection of sensitive downstream ICs.
The device sustains 600W peak pulse power per 10/1000μs waveform and handles up to 50A non-repetitive forward surge (8.3ms half-sine), while maintaining <1.0μA leakage at 28V and operating across –55°C to +175°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1mA | 31.1–34.4 V - Breakdown threshold range defining reliable turn-on margin |
| VC @ IPPM=13.6A | 44.0 V - Clamped voltage during 10/1000μs surge, limiting stress on protected circuitry |
| PPPM | 600 W - Peak pulse power handling capability per standard 10/1000μs waveform |
| IR @ VWM | <1.0 μA - Minimal leakage current ensuring low standby power loss |
| TJ Range | –55°C to +175°C - Extended thermal envelope supporting under-hood automotive use |
Pinout & Package
DO-214AC (SMA) surface-mount package: cathode-indicated band, matte tin-plated leads, UL 94V-0 molding compound, 0.060g weight, JESD201 Class 2 whisker resistance, MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / surge return node | Connected to system ground or low-impedance return path during clamping |
| Cathode | Protected line connection / high-side clamp input | Connected to line being protected (e.g., 28V rail); polarity marked by band |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD |
| Glass-passivated junction | Enhanced reliability and long-term stability of VBR and leakage under thermal/humidity stress |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Fast response time <1.0 ps | Enables suppression of nanosecond-scale ESD and fast-rising transients before downstream IC damage occurs |
Applications
| Automotive On-Board DC/DC Converters | Industrial Switching Mode Power Supplies |
|---|---|
Use Scenario: Protection of 24V-to-5V/3.3V buck converter inputs against load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed at input stage to clamp surges before they reach controller IC and MOSFET gate drivers. Use Value: Limits transient voltage to ≤44.0V at 13.6A, preventing latch-up or gate oxide rupture in downstream power management ICs. | Use Scenario: Input rail protection in DIN-rail mounted 48V SMPS used in factory automation controllers. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing repetitive switching noise and lightning-induced surges on primary-side bus. Use Value: Sustains 600W peak pulse power without degradation, maintaining <1.0μA leakage at 28V for low-power standby integrity. |
| LED Lighting Drivers | Automotive Body Control Modules (BCM) |
Use Scenario: Surge suppression on constant-current LED driver inputs exposed to 12V/24V vehicle battery lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp protecting LED driver ICs and current-sense amplifiers from battery reversal and jump-start spikes. Use Value: Clamps to 44.0V within <1ps, preserving LED string integrity and avoiding false fault triggering in analog feedback loops. | Use Scenario: Input protection for BCM microcontroller power rails subjected to ISO 7637-2 Pulse 1 (–150V/2Ω) and Pulse 2b (100V/50Ω). IC Role / Device Role / Timing Role: AEC-Q101-qualified TVS providing first-line defense against conducted transients entering via LIN/CAN power domains. Use Value: Operates reliably from –55°C to +175°C and meets J-STD-020 MSL Level 1, enabling reflow-compatible automated assembly without moisture sensitivity concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J28A (ON Semiconductor) | Same DO-214AC package, identical VWM/VBR/VC specs, but not AEC-Q101 qualified | Lacks automotive qualification; suitable only for industrial/commercial designs without AEC-Q101 mandate | Select SMA6J28A only if automotive qualification is not required and cost optimization is prioritized |
| SMLJ28A (Littelfuse) | Higher PPPM = 1500W, same VWM/VBR, larger DO-214AB (SMB) package | Requires PCB layout change due to larger footprint; over-spec'd for 600W needs unless higher surge margin is mandated | Choose SMLJ28A only when system-level surge testing exceeds 600W or SMB footprint is already standardized |
Compared with SMA6J28A and SMLJ28A, the SMA6J28AH uniquely combines AEC-Q101 qualification, DO-214AC form factor, and precise 600W/28V rating-making it optimal for space-constrained, automotive-compliant DC/DC input protection where qualification and footprint are non-negotiable.
Availability
SMA6J28AH is available at Aetrix Electronics and suitable for automotive body control modules, industrial SMPS units, LED lighting drivers, and on-board DC/DC converters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMA6J28AH 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, with global distribution and AEC-Q101 validation capabilities.
The SMA6Jx AH series was developed specifically for automotive and industrial transient suppression, emphasizing high-reliability packaging, ISO 7637-2 compliance, and extended temperature operation in compact DO-214AC form factor.
FAQ
What is the clamping voltage of the SMA6J28AH under peak pulse conditions?
The SMA6J28AH has a maximum clamping voltage (VC) of 44.0 V at 13.6 A peak pulse current (IPPM) using the standard 10/1000μs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMA6J28AH maintains this clamping performance across its full operating temperature range.
Is the SMA6J28AH qualified for automotive applications?
Yes, the SMA6J28AH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements-making it suitable for automotive power rail protection. It also complies with J-STD-020 Moisture Sensitivity Level 1 and supports lead-free reflow soldering. The SMA6J28AH is explicitly rated for junction temperatures from –55°C to +175°C, covering under-hood environments.
What package type does the SMA6J28AH use, and what are its mechanical highlights?
The SMA6J28AH uses the DO-214AC (SMA) surface-mount package. Key mechanical features include a UL 94V-0 flammability-rated molding compound, matte tin-plated leads compliant with J-STD-002, JESD201 Class 2 whisker resistance, cathode band polarity marking, and a nominal weight of 0.060 g. Its compact footprint supports high-density PCB layouts and automated placement.
How does the SMA6J28AH compare to the SMA6J28A in terms of qualification and reliability?
The SMA6J28AH is AEC-Q101 qualified and undergoes full automotive stress testing, whereas the SMA6J28A lacks this qualification. Both share identical electrical parameters (VWM, VBR, VC, PPPM), but only the SMA6J28AH guarantees performance in automotive environments per AEC-Q101. The SMA6J28AH also features glass passivation for improved long-term parameter stability under thermal cycling.
What is the maximum steady-state power dissipation rating for the SMA6J28AH?
The SMA6J28AH has a steady-state power dissipation (PD) rating of 4 W at TA = 25°C. This rating applies to continuous DC or low-frequency reverse bias conditions-not transient events. For pulsed operation, the device supports up to 600 W peak pulse power (10/1000μs), but sustained power must remain within the 4 W derated limit based on ambient temperature and PCB thermal design.
SMA6J28AH 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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 44V
- Current - Peak Pulse (10/1000µs):
- 13.6A
- 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)
SMA6J28AH FAQ
1.How can I place an order for SMA6J28AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J28AH 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 SMA6J28AH reliable?
The price and inventory of SMA6J28AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J28AH is usually 5 days.
3.What payment methods are accepted for SMA6J28AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J28AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J28AH?
SMA6J28AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J28AH 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 SMA6J28AH?
For technical support, including SMA6J28AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J28AH requirements.
6.How does Aetrix verify that SMA6J28AH is sourced from the original manufacturer or authorized distributors?
All SMA6J28AH 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 SMA6J28AH meets industry standards.
7.What is the process for return or replacement of SMA6J28AH?
All SMA6J28AH units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J28AH, 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 SMA6J28AH part is unused and in its original packaging.
Return procedure for SMA6J28AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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