My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ6.5-E3/61
- Part No.:
- SMAJ6.5-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5-E3/61.pdf
- Description:
- TVS DIODE 6.5VWM 12.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,824
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ6.5-E3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 6.5 V stand-off voltage (VWM), 7.22–8.82 V breakdown voltage (VBR at 10 mA), 12.3 V clamping voltage (VC) at 32.5 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMAJ6.5-E3/61 datasheet, SMAJ6.5-E3/61 pinout, SMAJ6.5-E3/61 application, or SMAJ6.5-E3/61 equivalent, key selection considerations include its unidirectional polarity, 150 °C maximum junction temperature, RoHS-compliant matte tin-plated leads, MSL Level 1 moisture sensitivity, and suitability for consumer, industrial, and automotive sensor line protection where fast response (<1 ns), low clamping ratio (VC/VWM ≈ 1.89), and 800 µA max reverse leakage at VWM are critical.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 GΩ effective) up to 6.5 V, then rapidly avalanches to clamp transient energy when voltage exceeds its 7.22–8.82 V breakdown range. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance.
The device delivers 400 W peak pulse power (10/1000 µs) on standard 0.2" × 0.2" copper pads, derating linearly above 25 °C ambient per Fig. 2, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead). It meets JESD201 Class 1A whisker resistance and supports automated SMT placement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 6.5 V - Maximum continuous reverse operating voltage before conduction begins; defines circuit's normal operating margin. |
| VBR (Breakdown Voltage) | 7.22–8.82 V at 10 mA - Voltage at which avalanche conduction initiates; tight 22% tolerance enables precise overvoltage threshold setting. |
| VC (Clamping Voltage) | 12.3 V at 32.5 A - Maximum voltage seen by protected circuit during 10/1000 µs surge; determines stress on downstream ICs/MOSFETs. |
| PPPM (Peak Pulse Power) | 400 W - Energy-handling capacity for standardized 10/1000 µs transient; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges. |
| IPPM (Peak Pulse Current) | 32.5 A - Maximum surge current the device safely clamps without failure; directly tied to PCB pad thermal design. |
| ID (Reverse Leakage) | 800 µA max at VWM - Low leakage preserves signal integrity and battery life in always-on circuits. |
| TJ (Junction Temp) | -55 to +150 °C - Wide operating range supports under-hood automotive and industrial environments. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, unidirectional configuration with cathode band marking. Dimensions: 4.50 mm × 2.79 mm × 2.29 mm (L × W × H); compliant with IPC-7351B SOIC127P10X35X27N footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to protected line's ground or low-side reference; must handle full surge current return path. |
| Cathode | Clamping node / High-side connection | Connected to protected signal/power line; avalanche conduction occurs from cathode to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W Peak Pulse Power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 surges without derating in compact SMA package. |
| Clamping Ratio VC/VWM = 1.89 | Minimizes overvoltage stress on protected ICs-critical for 3.3 V or 5 V logic interfaces. |
| Glass-Passivated Junction | Ensures stable VBR over lifetime and temperature, reducing field failure risk in harsh environments. |
| MSL Level 1 (260 °C Reflow) | Supports standard lead-free reflow profiles without preconditioning, simplifying manufacturing. |
| RoHS-Compliant Matte Tin Plating | Guarantees solderability per J-STD-002/JESD22-B102 and eliminates whisker growth in long-life applications. |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role: Unidirectional shunt clamping element placed between signal line and chassis ground. Use Value: Limits transient voltage to ≤12.3 V, preventing latch-up or gate oxide damage in 5 V tolerant transceivers while maintaining <800 µA standby leakage. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against inductive kickback from solenoid/relay coils. IC Role / Device Role: Primary overvoltage clamp on field-side input terminals, upstream of optocoupler isolation. Use Value: Absorbs 400 W surges without degradation, enabling >100,000 switching cycles with no parameter drift due to glass-passivated junction stability. |
| Consumer USB Port ESD Protection | Telecom Line Interface Protection |
Use Scenario: Secondary-level surge suppression on USB 2.0 VBUS and D+/D− lines in set-top boxes and smart displays exposed to AC adapter transients. IC Role / Device Role: Coordinated clamping device working with polymer PTC and ceramic capacitors in multi-stage protection network. Use Value: Fast <1 ns response captures early transient edge, while 12.3 V clamping prevents damage to USB PHY ICs rated for 5.5 V absolute maximum. |
Use Scenario: Protecting Ethernet PHY front-end and telephone line interface ICs from lightning-induced surges on RJ-11/RJ-45 ports. IC Role / Device Role: First-line shunt suppressor on tip/ring lines, paired with gas discharge tube (GDT) for high-energy diversion. Use Value: 32.5 A IPPM capability handles partial lightning currents after GDT triggering, ensuring reliable clamping down to telecom-grade -40 °C operating minimum. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5A-E3/61 | Narrower VBR range (7.22–7.98 V), lower VC (11.2 V), same PPPM and package. | Better clamping ratio (1.72) for tighter voltage margins; preferred where protected IC has <11.5 V absolute max rating. | Select SMAJ6.5A-E3/61 when lower clamping voltage is required without changing layout or thermal design. |
| SMBJ6.5-E3/52 | Same VWM/VBR/VC, but SMB package (DO-214AA) with higher PPPM (600 W) and larger footprint. | Higher surge handling for IEC 61000-4-5 Level 4; requires PCB redesign due to 4.58 mm × 3.94 mm body vs. SMA's 4.50 mm × 2.79 mm. | Choose SMBJ6.5-E3/52 only if system-level testing demands >400 W surge rating and board space allows larger package. |
Compared with SMAJ6.5-E3/61, the SMAJ6.5A-E3/61 offers superior clamping performance in identical form factor, while the SMBJ6.5-E3/52 trades compactness for higher energy absorption-neither is pin-compatible without layout change, and both require validation of thermal dissipation and leakage impact on signal integrity.
Availability
SMAJ6.5-E3/61 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC input conditioning, and consumer USB port surge suppression requiring stable component supply across production lifecycles.
Supply support for SMAJ6.5-E3/61 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and passive components with emphasis on reliability, precision, and application-specific optimization.
The SMAJ series is engineered for surface-mount transient suppression in space-constrained, high-reliability systems-targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 readiness (in HE3 variants) are mandatory.
FAQ
What is the polarity configuration of SMAJ6.5-E3/61?
SMAJ6.5-E3/61 is a unidirectional TVS diode, with the cathode identified by a band on the DO-214AC (SMA) package body. It conducts only when the cathode is biased positively relative to the anode, making it suitable for DC rail and signal-line protection where polarity is fixed. This differs from bi-directional variants (e.g., SMAJ6.5CA) that suppress surges regardless of polarity.
Does SMAJ6.5-E3/61 meet automotive qualification standards?
SMAJ6.5-E3/61 is RoHS-compliant and qualified to MSL Level 1, but it is the commercial-grade variant (E3 suffix). For automotive applications requiring AEC-Q101 qualification, the equivalent part is SMAJ6.5HE3/61 (HE3 suffix), which undergoes additional stress testing including HTOL, TCT, and ESD per AEC-Q101 Rev E. SMAJ6.5-E3/61 itself is not AEC-Q101 certified.
What is the maximum clamping voltage of SMAJ6.5-E3/61 under surge conditions?
The maximum clamping voltage (VC) of SMAJ6.5-E3/61 is 12.3 V, measured at its rated peak pulse current of 32.5 A using the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range (-55 °C to +150 °C) and defines the highest voltage the protected circuit will experience during a surge event.
How does the thermal performance of SMAJ6.5-E3/61 affect PCB layout?
SMAJ6.5-E3/61 has a junction-to-ambient thermal resistance (RθJA) of 120 °C/W, meaning its die temperature rises 120 °C per watt dissipated without heatsinking. To maintain safe operation below 150 °C junction temperature during repetitive surges, PCB layout must use minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the datasheet-smaller pads cause excessive thermal derating of PPPM.
Can SMAJ6.5-E3/61 be used in bi-directional protection circuits?
No, SMAJ6.5-E3/61 is strictly unidirectional and will not suppress negative-going transients on a floating or AC-coupled line. For bi-directional protection, the designated variant is SMAJ6.5CA-E3/61 (or SMAJ6.5CE3/61), which has symmetrical breakdown characteristics in both directions and no polarity marking. Using SMAJ6.5-E3/61 in bi-directional applications risks catastrophic failure during reverse-polarity surges.
SMAJ6.5-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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)
SMAJ6.5-E3/61 FAQ
1.How can I place an order for SMAJ6.5-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5-E3/61 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 SMAJ6.5-E3/61 reliable?
The price and inventory of SMAJ6.5-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ6.5-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ6.5-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5-E3/61?
SMAJ6.5-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5-E3/61 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 SMAJ6.5-E3/61?
For technical support, including SMAJ6.5-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5-E3/61 requirements.
6.How does Aetrix verify that SMAJ6.5-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5-E3/61 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 SMAJ6.5-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ6.5-E3/61?
All SMAJ6.5-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5-E3/61, 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 SMAJ6.5-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ6.5-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ6.5-E3/61 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
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
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 …
