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Vishay General Semiconductor - Diodes Division SMAJ6.5AHE3_A/H
- Part No.:
- SMAJ6.5AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5AHE3_A/H.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,291
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Product details
Overview
SMAJ6.5AHE3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for primary overvoltage protection of sensitive electronics. It features a 6.5 V stand-off voltage (VWM), 7.22–7.98 V breakdown voltage (VBR) at 10 mA test current, and clamps transients to ≤11.2 V at 35.7 A peak pulse current (IPPM) under 10/1000 μs waveform - deployed on power rails and I/O lines of automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMAJ6.5AHE3_A/H datasheet, SMAJ6.5AHE3_A/H pinout, SMAJ6.5AHE3_A/H application, or SMAJ6.5AHE3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, 400 W peak pulse power rating (10/1000 μs), low clamping ratio (VC/VBR ≈ 1.55), and compatibility with automated SMT assembly on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging an avalanche junction to divert surge energy away from protected circuitry when reverse voltage exceeds VBR. Its glass-passivated chip junction ensures stable breakdown characteristics and long-term reliability under repetitive transient stress.
Designed for surface-mount integration, SMAJ6.5AHE3_A/H delivers fast response time (<1 ps), low incremental surge resistance, and thermal performance validated up to 150 °C junction temperature. It meets MSL level 1 per J-STD-020 and supports lead-free reflow with peak temperature of 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - maximum continuous reverse operating voltage before clamping initiates; defines safe DC/AC signal rail margin. |
| VBR (min/max) | 7.22 V / 7.98 V at 10 mA - guaranteed avalanche onset range; ensures consistent turn-on across production lots. |
| VC @ IPPM | 11.2 V at 35.7 A - clamped voltage during 10/1000 μs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 400 W - peak pulse power handling capability; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 500 μA - maximum reverse leakage at rated stand-off; minimizes quiescent power loss in battery-powered systems. |
| TJ max. | +150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| RθJA | 120 °C/W - thermal resistance junction-to-ambient; informs derating requirements on standard PCB layouts. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, single-ended unidirectional configuration. Cathode indicated by molded band on case body; anode is unmarked end. Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge return path | Connected to ground or low-impedance reference plane; carries full transient current during clamping event. |
| Anode (unbanded end) | Protected line input | Connected to vulnerable node (e.g., power rail or signal line); voltage referenced to cathode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for ECU, ADAS, and body control modules. |
| 400 W peak pulse power (10/1000 μs) | Withstands high-energy transients from load dump or inductive switching without degradation - critical for 12 V vehicle systems. |
| Low clamping voltage (VC = 11.2 V) | Minimizes overvoltage exposure to downstream components such as microcontrollers and CAN transceivers - improves system-level surge immunity. |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; compatible with standard SMT reflow profiles up to 260 °C peak temperature. |
| Glass passivated junction | Provides stable electrical parameters over time and temperature; reduces parameter drift in harsh industrial environments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply inputs of engine control units against ISO 7637-2 pulse 5a (load dump) and pulse 1/2a (inductive switch-off). IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery rail and LDO input. Use Value: Limits transient voltage to ≤11.2 V, preventing latch-up or permanent damage to 16-bit MCUs and analog front-ends. |
Use Scenario: Shielding 4–20 mA current loop transmitters from ESD and field-induced surges in factory automation systems. IC Role / Device Role / Timing Role: Primary overvoltage clamp on analog output line, upstream of precision DAC and op-amp stages. Use Value: Maintains signal integrity by suppressing >1 kV transients within nanoseconds while adding <500 μA leakage at 6.5 V. |
| Consumer USB Port ESD Protection | Telecom Line Card Surge Suppression |
|
Use Scenario: Secondary protection layer on VBUS line of USB 2.0 host ports subjected to IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Fast-response clamping diode placed after polymer PTC and before USB switch IC. Use Value: Clamps ESD events to <12 V within <1 ps, preserving USB enumeration and preventing PHY latch-up. |
Use Scenario: Front-end surge suppression on RJ-45 Ethernet PHY lines exposed to lightning-induced surges in outdoor base stations. IC Role / Device Role / Timing Role: Stand-off voltage-matched TVS on differential pair, coordinated with common-mode chokes. Use Value: Handles 400 W 10/1000 μs surges while maintaining <11.2 V clamping - compatible with IEEE 802.3af PoE voltage margins. |
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 | Commercial-grade version; same electrical specs but not AEC-Q101 qualified; RoHS-compliant, no halogen restriction. | Lacks automotive qualification; unsuitable for under-hood or safety-critical modules requiring AEC-Q101 validation. | Select SMAJ6.5AHE3_A/H when automotive qualification, traceable sourcing, and extended temperature reliability are mandatory. |
| SMAJ6.5CAHE3_A/H | Bidirectional variant; identical VWM (6.5 V), VBR (7.22–7.98 V), and VC (11.2 V), but symmetrical conduction in both polarities. | Required for AC-coupled or floating signal lines where polarity reversal or bidirectional surges occur (e.g., RS-485, audio lines). | Choose SMAJ6.5CAHE3_A/H only if bidirectional clamping is needed; SMAJ6.5AHE3_A/H is optimal for DC power rails with defined polarity. |
Compared with SMAJ6.5A-E3/61, SMAJ6.5AHE3_A/H adds AEC-Q101 qualification and enhanced process controls for automotive use; compared with SMAJ6.5CAHE3_A/H, it provides lower capacitance and optimized unidirectional clamping for DC power protection - enabling tighter voltage margins and simpler layout.
Availability
SMAJ6.5AHE3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and telecom infrastructure requiring stable component supply with AEC-Q101 compliance and traceable lot history.
Supply support for SMAJ6.5AHE3_A/H 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 protection devices with emphasis on reliability, efficiency, and application-specific optimization.
SMAJ series TVS diodes are engineered for high-energy transient suppression in automotive, industrial, and communications systems - delivering precise clamping, fast response, and rugged packaging for mission-critical protection.
FAQ
What is the clamping voltage of SMAJ6.5AHE3_A/H at its rated peak pulse current?
The SMAJ6.5AHE3_A/H clamps to a maximum of 11.2 V at its specified peak pulse current of 35.7 A under the 10/1000 μs waveform. This value is measured per JEDEC standards and reflects worst-case clamping performance across temperature and production lot variations - critical for ensuring downstream ICs remain within absolute maximum ratings during surge events. The SMAJ6.5AHE3_A/H achieves this with low dynamic impedance and stable avalanche behavior.
Is SMAJ6.5AHE3_A/H suitable for automotive applications?
Yes, SMAJ6.5AHE3_A/H is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and ADAS sensors. Its qualification covers temperature cycling, high-temperature reverse bias, and surge endurance testing - all verified per AEC-Q101 Rev D. The SMAJ6.5AHE3_A/H also meets MSL Level 1 and supports lead-free reflow up to 260 °C, making it compatible with modern automotive PCB assembly processes.
How does the breakdown voltage tolerance of SMAJ6.5AHE3_A/H affect circuit design?
The SMAJ6.5AHE3_A/H has a guaranteed breakdown voltage range of 7.22 V to 7.98 V at 10 mA test current, providing a ±5.5% tolerance around the nominal 7.6 V typical value. This tight VBR spread allows designers to confidently set VWM at 6.5 V while maintaining ≥10% margin to minimum VBR - ensuring reliable clamping initiation without false triggering during normal operation. The SMAJ6.5AHE3_A/H's low temperature coefficient (0.061 %/°C) further stabilizes this margin across -55 °C to +150 °C.
What is the maximum reverse leakage current of SMAJ6.5AHE3_A/H at its stand-off voltage?
The SMAJ6.5AHE3_A/H exhibits a maximum reverse leakage current (ID) of 500 μA at its 6.5 V stand-off voltage (VWM) and 25 °C ambient temperature. This low leakage supports energy-sensitive applications such as battery-backed sensors and always-on automotive modules. Leakage remains below 2 mA up to 125 °C, ensuring predictable power budgeting across full operating range - a key advantage of the SMAJ6.5AHE3_A/H's glass-passivated junction technology.
Can SMAJ6.5AHE3_A/H be used in place of SMAJ6.5A-E3/61 without layout changes?
Yes, SMAJ6.5AHE3_A/H shares identical SMA (DO-214AC) package dimensions, pinout, and solder pad requirements with SMAJ6.5A-E3/61 - enabling drop-in replacement in existing designs. Both parts use the same 0.2" × 0.2" copper pad layout and matte tin-plated terminals compliant with J-STD-002. However, SMAJ6.5AHE3_A/H adds AEC-Q101 qualification and enhanced process controls, so it should be selected when automotive reliability, traceability, or extended temperature validation is required - the SMAJ6.5AHE3_A/H requires no PCB modifications.
SMAJ6.5AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- 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):
- 35.7A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ6.5AHE3_A/H FAQ
1.How can I place an order for SMAJ6.5AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5AHE3_A/H 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 SMAJ6.5AHE3_A/H reliable?
The price and inventory of SMAJ6.5AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ6.5AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ6.5AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5AHE3_A/H?
SMAJ6.5AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5AHE3_A/H 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 SMAJ6.5AHE3_A/H?
For technical support, including SMAJ6.5AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5AHE3_A/H requirements.
6.How does Aetrix verify that SMAJ6.5AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5AHE3_A/H 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 SMAJ6.5AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ6.5AHE3_A/H?
All SMAJ6.5AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5AHE3_A/H, 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 SMAJ6.5AHE3_A/H part is unused and in its original packaging.
Return procedure for SMAJ6.5AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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