My Inquiry
My Account
Alpha & Omega Semiconductor Inc. SMDJ6.5A
- Part No.:
- SMDJ6.5A
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ6.5A.pdf
- Description:
- 1CH 6.5V UNIDIRECTIONAL 3000W SM
- Quantity:
- Payment:
- Shipping:
Inventory:4,483
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMDJ6.5A from Alpha & Omega Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 6.5 V reverse stand-off voltage (VRWM), 7.22–7.98 V breakdown voltage (VBR) at 10 mA, 11.2 V maximum clamping voltage at 267.9 A peak pulse current, and 3000 W peak pulse power dissipation on a 10/1000 µs waveform - deployed in industrial motor drives and telecom power supplies.
For engineers reviewing the SMDJ6.5A datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin vs. protected IC VDD rating, unidirectional polarity alignment with DC rail orientation, thermal resistance (RθJA = 75 °C/W), and DO-214AB package compatibility with automated SMT assembly and board space constraints.
Technical Context
The SMDJ6.5A operates as a silicon avalanche diode that enters breakdown when transient voltage exceeds its specified VBR range, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable leakage and long-term reliability under repetitive surges up to 0.01% duty cycle.
Designed for surface-mount use on 8.0 mm × 8.0 mm copper pads per terminal, it delivers fast response (<1.0 ps from 0 V to VBR) and meets J-STD-020 MSL Level 1 (260 °C reflow peak), with a maximum junction temperature of +150 °C and low-profile DO-214AB mechanical form factor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 6.5 V - Maximum continuous reverse operating voltage before clamping begins; must exceed normal DC rail voltage by ≥10% to avoid leakage-induced heating. |
| VBR @ IT=10 mA | 7.22–7.98 V - Measured breakdown range defining turn-on threshold; tight tolerance enables predictable clamping onset in 5–12 V systems. |
| Vc @ IPPM | 11.2 V - Clamped voltage at 267.9 A peak pulse; determines maximum stress imposed on protected ICs during ESD/EFT events. |
| PPPM (10/1000 µs) | 3000 W - Peak surge energy handling capacity; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) compliance when properly laid out. |
| IR @ VRWM | 500 µA - Reverse leakage at rated stand-off voltage; low enough to prevent significant quiescent power loss in battery-powered applications. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on standard FR-4; requires adequate copper area to maintain TJ ≤ 150 °C under repeated surges. |
Pinout & Package
DO-214AB (SMC J-Bend) surface-mount package with cathode indicated by a color band; two-terminal device with no internal connections beyond anode and cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current return path | Connected to ground or low-impedance reference plane; must be routed with minimal inductance to preserve clamping speed. |
| Cathode | Protected line connection | Connected to the line being protected (e.g., +12 V rail); polarity-sensitive - reversal causes forward conduction and failure. |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Enables suppression of sub-nanosecond ESD transients before sensitive logic inputs are overstressed. |
| Glass passivated junction | Stable VBR over temperature and lifetime - ΔVBR = 0.1% × VBR × ΔT ensures consistent clamping across -55°C to +150°C. |
| Low profile DO-214AB | Height ≤ 2.6 mm - Allows placement beneath connectors or in height-constrained enclosures without interference. |
| UL 94V-0 flammability | Self-extinguishing plastic housing - Meets safety requirements for enclosed industrial and telecom equipment. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of 12 V control logic inputs against inductive kickback from relay coils and H-bridge switching noise. IC Role / Device Role: Unidirectional TVS placed between microcontroller GPIO and external field wiring. Use Value: Clamps transients to ≤11.2 V while absorbing 3000 W pulses, preventing latch-up or permanent damage to 3.3 V/5 V logic ICs. | Use Scenario: Input-side surge suppression on 48 V DC-DC converter front-ends exposed to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role: Primary-level TVS mounted directly at connector entry point before bulk capacitance. Use Value: Limits voltage excursion to 11.2 V at 267.9 A, enabling downstream MOSFETs and controllers to survive 4 kV combination wave tests. |
| Automotive Body Control Modules | Point-of-Load DC Distribution |
Use Scenario: Protecting LIN bus transceivers and sensor supply rails from load dump and jump-start transients in 12 V vehicle subsystems. IC Role / Device Role: Unidirectional TVS on VBAT-supplied sensor power lines with cathode tied to VBAT. Use Value: Withstands 300 A surge currents and maintains clamping below 12 V, preserving ISO 16750-2 compliance for 12 V systems. | Use Scenario: Localized surge protection on PCB-mounted 5 V/3.3 V regulator outputs feeding FPGA I/O banks or ADC references. IC Role / Device Role: Secondary-level TVS placed immediately upstream of sensitive analog/digital loads. Use Value: Low 500 µA leakage avoids regulation error; fast <1 ps response prevents overshoot-induced timing violations in high-speed digital interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC5.0 | Lower PPPM (500 W), higher VRWM (5.0 V), same DO-214AB package | Targeted at lower-energy ESD-only scenarios; insufficient for IEC 61000-4-5 Level 4 | Select only where peak surge energy remains below 500 W and clamping margin allows 9.6 V max Vc |
| SMDJ6.5CA | Bidirectional variant with identical VBR/Vc ratings but symmetrical clamping in both polarities | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN) where polarity reversal occurs | Use SMDJ6.5CA instead only if protecting bidirectional signals; SMDJ6.5A is optimal for fixed-polarity DC rails |
Compared with SAC5.0, the SMDJ6.5A provides 6× higher surge power handling and tighter VBR tolerance, making it suitable for harsh industrial environments; versus SMDJ6.5CA, it offers lower cost and reduced capacitance for unidirectional DC protection where polarity is fixed.
Availability
SMDJ6.5A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and point-of-load DC distribution requiring stable component supply and full traceability.
Supply support for SMDJ6.5A 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
Alpha & Omega Semiconductor (AOS) is a fabless power semiconductor company specializing in high-efficiency MOSFETs, TVS diodes, and power ICs for computing, consumer, industrial, and automotive markets.
The SMDJ series is part of AOS' transient protection portfolio, engineered specifically for high-power, surface-mount surge suppression in demanding DC power and interface applications with strict thermal and reliability requirements.
FAQ
What is the maximum clamping voltage of the SMDJ6.5A under a 10/1000 µs surge?
The SMDJ6.5A has a maximum clamping voltage (Vc) of 11.2 V when subjected to its rated peak pulse current of 267.9 A on a 10/1000 µs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during worst-case surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the SMDJ6.5A suitable for bidirectional signal line protection?
No, the SMDJ6.5A is a unidirectional TVS diode and must be used only on polarity-fixed DC lines. For bidirectional applications such as RS-485, CAN, or AC-coupled interfaces, the SMDJ6.5CA variant - which clamps symmetrically in both directions - is required. Using SMDJ6.5A on bidirectional lines risks forward conduction and catastrophic failure.
What is the thermal resistance of the SMDJ6.5A, and how does it affect layout?
The SMDJ6.5A has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on standard FR-4 with no added copper. To maintain safe operation under repetitive surges, PCB layout must include ≥8.0 mm × 8.0 mm copper pads per terminal - this reduces RθJA and prevents junction temperature from exceeding 150 °C during sustained transient activity.
Does the SMDJ6.5A meet RoHS and halogen-free requirements?
Yes, the SMDJ6.5A is an AOS Green Product: fully RoHS compliant, lead-free, and halogen-free per AOS' Green Policy. It carries UL 94V-0 flammability rating and is qualified to J-STD-020 MSL Level 1, supporting lead-free reflow profiles up to 260 °C peak temperature without degradation.
How does the SMDJ6.5A compare to the SMDJ6.0A in terms of voltage ratings?
The SMDJ6.5A has a higher reverse stand-off voltage (VRWM = 6.5 V) and breakdown range (7.22–7.98 V) than the SMDJ6.0A (VRWM = 6.0 V, VBR = 6.67–7.37 V). This 0.5 V increase provides greater margin against normal operating voltage fluctuations while maintaining identical 3000 W PPPM and DO-214AB packaging - making SMDJ6.5A preferred for 6–7 V nominal rails where tighter clamping control is needed.
SMDJ6.5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Alpha & Omega Semiconductor Inc.
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 11.2V
- Current - Peak Pulse (10/1000µs):
- 267.9A
- Power - Peak Pulse:
- 3000W (3kW)
- 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-214AB
SMDJ6.5A FAQ
1.How can I place an order for SMDJ6.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ6.5A 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 SMDJ6.5A reliable?
The price and inventory of SMDJ6.5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ6.5A is usually 5 days.
3.What payment methods are accepted for SMDJ6.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ6.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ6.5A?
SMDJ6.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ6.5A 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 SMDJ6.5A?
For technical support, including SMDJ6.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ6.5A requirements.
6.How does Aetrix verify that SMDJ6.5A is sourced from the original manufacturer or authorized distributors?
All SMDJ6.5A 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 SMDJ6.5A meets industry standards.
7.What is the process for return or replacement of SMDJ6.5A?
All SMDJ6.5A units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ6.5A, 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 SMDJ6.5A part is unused and in its original packaging.
Return procedure for SMDJ6.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ6.5A 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
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…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
