My Inquiry
My Account
Taiwan Semiconductor Corporation SMAJ6.5C
- Part No.:
- SMAJ6.5C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5C.pdf
- Description:
- 400W, 8V, 10%, BIDIRECTIONAL, TV
- Quantity:
- Payment:
- Shipping:
Inventory:6,205
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ6.5C from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, with 7.22V minimum breakdown voltage, 8.82V maximum breakdown voltage at 10mA test current, and 12.3V clamping voltage at 500A peak pulse current. It protects DC/DC converters and power adapters against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMAJ6.5C datasheet, SMAJ6.5C pinout, SMAJ6.5C application, or SMAJ6.5C equivalent, key selection factors include its 10V working stand-off voltage, 6.5µA max reverse leakage at VWM, 150°C junction temperature rating, and bidirectional-capable C-suffix marking for polarity-sensitive layouts.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve sub-1.0ps response time from 0V to VBR(min), enabling effective suppression of fast-rising ESD and load-dump transients. Its unidirectional configuration provides asymmetric clamping-low forward voltage (3.5V @ 25A) on anode-to-cathode conduction and high reverse blocking up to 10V VWM.
The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements, with matte tin-plated leads compliant to J-STD-002 solderability. Thermal derating follows Fig.2: peak power drops linearly above 25°C ambient, maintaining 400W only at TA ≤ 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for circuit bias stability |
| VBR @ IT=10mA | 7.22–8.82 V - Breakdown threshold range defining turn-on sensitivity; ensures reliable triggering above normal rail noise |
| VC @ IPPM=500A | 12.3 V - Clamped voltage during 10/1000μs surge; determines worst-case overvoltage seen by protected IC |
| IR @ VWM | ≤6.5 µA - Reverse leakage at stand-off voltage; negligible power loss in low-current standby systems |
| PPPM | 400 W - Peak pulse power handling per 10/1000μs waveform; supports automotive load-dump immunity per ISO 7637-2 |
| TJ max | 150 °C - Maximum junction temperature; enables operation in under-hood or enclosed power supply environments |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with 0.060g mass and J-STD-020 Level 1 moisture sensitivity |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with cathode band marking; matte tin-plated leads; polarity indicated by single black band at cathode end; weight ≈ 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal in forward bias | Connects to lower-potential side of protected line; conducts during forward surges (e.g., reverse battery events) |
| Cathode | Negative terminal / marked end | Connects to higher-potential side (e.g., VIN rail); blocks reverse current until VBR exceeded |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| Sub-1.0ps response time | Clamps transients before sensitive logic or analog circuits experience damaging overvoltage |
| ISO 7637-2 compliance | Validated for automotive electrical system immunity including Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) |
| J-STD-020 Level 1 MSL | Zero floor life limitation; no baking required prior to reflow soldering |
| RoHS & halogen-free | Meets IEC 61249-2-21; suitable for consumer and industrial applications with strict environmental compliance |
Applications
| Automotive Power Input Protection | Industrial DC/DC Converter Input |
|---|---|
Use Scenario: Protecting 12V vehicle infotainment head unit input against load-dump transients up to 120V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC/DC converter input to clamp surges before regulation stage. Use Value: Limits peak voltage to 12.3V during 500A 10/1000μs pulses, preventing damage to downstream buck controller ICs rated for 16V absolute max. |
Use Scenario: Safeguarding isolated 24V-to-5V DC/DC module in factory automation PLC I/O card. IC Role / Device Role / Timing Role: Standoff protection on primary-side input to absorb switching noise and EFT bursts coupled from adjacent relay drivers. Use Value: With 10V VWM, it remains fully blocking during normal 24V operation while responding within <1ps to fast transients exceeding 7.22V. |
| LED Driver Power Stage | AC-DC Adapter Secondary Side |
Use Scenario: Suppressing inductive kickback from constant-current LED string drivers in streetlight fixtures. IC Role / Device Role / Timing Role: Parallel-connected TVS across MOSFET drain-source to clamp flyback voltage spikes during PWM turn-off. Use Value: 400W peak power rating handles repetitive 10/1000μs surges from 100W+ LED loads without thermal runaway or parameter drift. |
Use Scenario: Reverse-polarity and surge protection on +12V output of wall-mounted AC-DC adapter for network cameras. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to ground, absorbing plug-in surges and miswiring events. Use Value: 3.5V forward voltage at 25A allows safe conduction during reverse-battery faults, limiting fault current while protecting downstream LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5A | Lower VBR max (7.98V vs. 8.82V); tighter 10% VBR tolerance; same VC = 11.2V @ 500A | Better suited for precision 5V rail protection where lower clamping onset is critical | Select SMAJ6.5A when tighter breakdown consistency is required; SMAJ6.5C offers broader VBR range for cost-sensitive volume production |
| SMBJ6.5C | Same electrical specs but in larger DO-214AA (SMB) package; 600W PPPM rating; 0.110g mass | Higher power margin and improved thermal dissipation for high-repetition-rate surge environments | Choose SMBJ6.5C if board layout permits larger footprint and >400W pulse handling is needed; SMAJ6.5C optimizes space-constrained designs |
Compared with SMAJ6.5A and SMBJ6.5C, the SMAJ6.5C balances compact DO-214AC packaging, broad VBR tolerance for manufacturing yield, and full ISO 7637-2 compliance-making it optimal for space-limited automotive and industrial power inputs where 400W clamping suffices.
Availability
SMAJ6.5C is available at Aetrix Electronics and suitable for automotive power input protection, industrial DC/DC converter input stages, and LED driver power stage applications requiring stable component supply across extended temperature and surge stress conditions.
Supply support for SMAJ6.5C 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 since 1979.
The SMAJ series was developed specifically for robust, surface-mount transient suppression in automotive and industrial power systems, emphasizing ISO 7637-2 compliance, high surge reliability, and automated assembly compatibility.
FAQ
What is the polarity configuration of SMAJ6.5C?
The SMAJ6.5C is a unidirectional TVS diode, identified by the "C" suffix and marked with a single cathode band on the DO-214AC package. Its anode must connect toward the lower-potential side of the protected line, and cathode toward the higher-potential side-enabling forward conduction during reverse-battery faults and reverse blocking during normal operation. This configuration is confirmed in the Electrical Specifications table and Mechanical Data section of the U2102 datasheet.
Does SMAJ6.5C meet automotive transient immunity standards?
Yes, SMAJ6.5C meets ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) requirements as explicitly stated in the FEATURES section. Its 400W peak pulse power rating at 10/1000μs, 12.3V clamping voltage at 500A, and 150°C junction rating make it suitable for 12V automotive power networks per ISO 16750-2.
What is the maximum clamping voltage of SMAJ6.5C under surge conditions?
The maximum clamping voltage of SMAJ6.5C is 12.3 V, measured at 500 A peak impulse current using the standard 10/1000 μs waveform. This value is specified in the ELECTRICAL SPECIFICATIONS table for part number SMAJ6.5 and applies directly to SMAJ6.5C as a unidirectional variant. It defines the highest voltage imposed on protected circuitry during worst-case surge events.
Can SMAJ6.5C be used in bidirectional applications?
No-SMAJ6.5C is strictly unidirectional. For bidirectional operation, TSC specifies the "CA" suffix (e.g., SMAJ6.5CA), which uses symmetrical breakdown in both directions. The "C" suffix denotes unidirectional behavior with cathode-band polarity marking; using SMAJ6.5C in reverse-biased configurations outside its specified VWM will cause premature conduction or failure.
What is the moisture sensitivity level (MSL) of SMAJ6.5C?
SMAJ6.5C has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it has unlimited floor life and requires no baking prior to reflow soldering. This is confirmed in the FEATURES list and supports direct placement in high-volume automated assembly lines without dry-pack handling or time-controlled storage protocols.
SMAJ6.5C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- SMAJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 12.3V
- Current - Peak Pulse (10/1000µs):
- 32.5A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ6.5C FAQ
1.How can I place an order for SMAJ6.5C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5C 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 SMAJ6.5C reliable?
The price and inventory of SMAJ6.5C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ6.5C is usually 5 days.
3.What payment methods are accepted for SMAJ6.5C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5C?
SMAJ6.5C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5C 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 SMAJ6.5C?
For technical support, including SMAJ6.5C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5C requirements.
6.How does Aetrix verify that SMAJ6.5C is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5C 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 SMAJ6.5C meets industry standards.
7.What is the process for return or replacement of SMAJ6.5C?
All SMAJ6.5C units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5C, 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 SMAJ6.5C part is unused and in its original packaging.
Return procedure for SMAJ6.5C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ6.5C Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
