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Taiwan Semiconductor Corporation SMA6J30A
- Part No.:
- SMA6J30A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J30A.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,696
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Product details
Overview
SMA6J30A from Taiwan Semiconductor is a 600W surface-mount transient voltage suppressor (TVS) diode with a 30V working standoff voltage (VWM), 33.3–36.8V breakdown voltage (VBR), and 48.4V clamping voltage (VC) at 12.3A peak pulse current, designed for surge protection in DC/DC converters and automotive power systems.
For engineers reviewing the SMA6J30A datasheet, SMA6J30A pinout, SMA6J30A application, or SMA6J30A equivalent, key selection criteria include its DO-214AC (SMA) package, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, 1.0ps response time, and 175°C maximum junction temperature - critical for high-reliability industrial and automotive power rail protection.
Technical Context
This unidirectional TVS diode operates as a reverse-biased avalanche clamp, triggered when transient voltage exceeds VBR (min 33.3V). It delivers 600W peak pulse power under 10/1000μs waveform while maintaining low leakage (<1.0μA at 30V) and fast sub-picosecond response to protect downstream circuitry.
Its DO-214AC (SMA) package supports automated placement and meets JESD201 Class 2 whisker resistance, UL 94V-0 flammability, and RoHS/halogen-free requirements - enabling use in space-constrained, high-safety automotive and industrial power modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1mA | 33.3–36.8 V - Avalanche breakdown threshold ensuring precise overvoltage triggering |
| VC @ IPPM=12.3A | 48.4 V - Clamped voltage during 10/1000μs surge, limiting stress on protected ICs |
| PPPM | 600 W - Peak pulse power handling per ISO 7637-2-compliant transients |
| TJ max | 175 °C - Enables operation in under-hood automotive environments and high-power SMPS |
| IR @ VWM | <1.0 μA - Negligible leakage current preserving efficiency in standby/battery-powered systems |
| Response time | <1.0 ps - Sub-nanosecond reaction ensures protection of fast-switching MOSFETs and controllers |
Pinout & Package
DO-214AC (SMA) package: surface-mount, single-diode configuration with cathode band marking polarity; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane to complete clamping loop |
| Cathode | Protected line connection / surge input | Connected to power rail (e.g., 24V or 30V bus) requiring transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enhances long-term reliability and stability of VBR under thermal cycling and humidity |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive load-dump and inductive-switching surge immunity without external filtering |
| Moisture sensitivity level 1 (J-STD-020) | Eliminates pre-bake requirement before reflow, reducing manufacturing cost and process complexity |
| UL 94V-0 molding compound | Prevents flame propagation in enclosed power modules and lighting housings |
Applications
| Automotive Power Rails | Industrial SMPS Inputs |
|---|---|
Use Scenario: Protection of 24V battery-fed ECUs against load dump and alternator transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC/DC converter input. Use Value: Limits clamped voltage to 48.4V at 12.3A, preventing damage to 60V-rated input MOSFETs and controllers. | Use Scenario: Input surge suppression in 48V telecom rectifiers exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-line TVS device mounted at AC-DC or DC-DC front-end. Use Value: Absorbs 600W pulses with <1ps response, avoiding latch-up in upstream PFC controllers. |
| LED Driver Power Stages | On-board DC/DC Converters |
Use Scenario: Transient protection for constant-current LED drivers in streetlight applications with outdoor exposure. IC Role / Device Role / Timing Role: Reverse-biased TVS across output capacitor to suppress inductive kickback from driver FETs. Use Value: 48.4V clamping prevents overvoltage failure of 50V-rated output capacitors and current-sense resistors. | Use Scenario: Input-side protection of isolated 5V/3.3V buck converters in PLC I/O modules. IC Role / Device Role / Timing Role: Clamp on primary-side 24V input rail before isolation transformer or controller. Use Value: Maintains <1.0μA leakage at 30V, minimizing standby power loss in always-on industrial nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J33A | VWM = 33V, VBR = 36.7–40.6V, VC = 53.3V at 11.3A | Higher clamping voltage; suited for 36V nominal systems | Select when system nominal voltage exceeds 30V and higher VWM margin is required |
| SMB6J30A | Same VWM/VBR/VC specs but DO-214AA (SMB) package (larger footprint, higher thermal mass) | Lower power density; preferred where board space allows and thermal derating is critical | Choose for improved steady-state power dissipation (5W vs. 4W) in high-ambient-temperature environments |
Compared with SMA6J30A, SMA6J33A raises clamping headroom for 36V systems but increases protected-rail stress, while SMB6J30A trades compactness for better thermal performance - making SMA6J30A optimal for space-constrained 24–30V automotive and industrial DC rails.
Availability
SMA6J30A is available at Aetrix Electronics and suitable for automotive ECUs, industrial SMPS inputs, and LED driver power stages requiring stable component supply with full traceability and lifecycle management.
Supply support for SMA6J30A 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 high-reliability protection devices and power management components.
The SMA6JxxA series is part of TSC's transient voltage suppressor portfolio, engineered specifically for ISO 7637-2-compliant automotive and industrial power rail protection with emphasis on fast response, tight parameter distribution, and robust packaging.
FAQ
What is the maximum clamping voltage of SMA6J30A at its rated peak pulse current?
The SMA6J30A has a maximum clamping voltage (VC) of 48.4 V at 12.3 A peak pulse current (IPPM), measured under the standard 10/1000 μs waveform. This value ensures protected downstream components - such as 60V-rated MOSFETs or controllers - remain within safe operating limits during surge events. The SMA6J30A maintains this clamping performance across its specified junction temperature range of –55°C to +175°C.
Does SMA6J30A meet automotive surge immunity standards?
Yes, SMA6J30A meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b, making it suitable for automotive power rail protection including 12V and 24V systems. Its 600W peak pulse power rating, sub-1ps response time, and stable VBR tolerance (33.3–36.8V) are validated per these test waveforms. The SMA6J30A is not rated for Pulse 5a (load dump), which requires higher energy handling.
What is the package type and mounting compatibility of SMA6J30A?
SMA6J30A uses the DO-214AC (SMA) surface-mount package with matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. Its low-profile design supports automated pick-and-place assembly and fits standard SMA footprints defined in IPC-7351. Polarity is marked by a cathode band, and the device weighs approximately 0.060 g.
How does SMA6J30A compare to SMA6J24A in terms of voltage rating and application scope?
SMA6J30A has a 30V working standoff voltage (VWM) and 33.3–36.8V breakdown range, targeting 24–30V nominal systems, whereas SMA6J24A (VWM = 24V, VBR = 26.7–29.5V) suits 20–24V rails. Their clamping voltages differ accordingly (48.4V vs. 37.8V), meaning SMA6J30A provides higher overvoltage headroom but less margin below 60V component ratings. Both share identical 600W PPPM and DO-214AC packaging.
Is SMA6J30A RoHS and halogen-free compliant?
Yes, SMA6J30A is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound meets UL 94V-0 flammability rating, and the device carries moisture sensitivity level (MSL) 1 per J-STD-020 - eliminating the need for dry-packaging or pre-reflow baking. These qualifications support use in environmentally regulated industrial, automotive, and lighting applications.
SMA6J30A 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 12.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA6J30A FAQ
1.How can I place an order for SMA6J30A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J30A 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 SMA6J30A reliable?
The price and inventory of SMA6J30A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J30A is usually 5 days.
3.What payment methods are accepted for SMA6J30A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J30A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J30A?
SMA6J30A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J30A 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 SMA6J30A?
For technical support, including SMA6J30A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J30A requirements.
6.How does Aetrix verify that SMA6J30A is sourced from the original manufacturer or authorized distributors?
All SMA6J30A 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 SMA6J30A meets industry standards.
7.What is the process for return or replacement of SMA6J30A?
All SMA6J30A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J30A, 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 SMA6J30A part is unused and in its original packaging.
Return procedure for SMA6J30A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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