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Vishay General Semiconductor - Diodes Division SMAJ6.5AHM3/I
- Part No.:
- SMAJ6.5AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.5AHM3/I.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,039
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Product details
Overview
SMAJ6.5AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. 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 up to 11.2 V at 35.7 A peak pulse current (IPPM) under 10/1000 μs waveform - ideal for protecting MOSFET gates and IC inputs in automotive body electronics.
For engineers reviewing the SMAJ6.5AHM3/I datasheet, SMAJ6.5AHM3/I pinout, SMAJ6.5AHM3/I application, or SMAJ6.5AHM3/I equivalent, key selection criteria include its 400 W peak pulse power rating (10/1000 μs), AEC-Q101 qualification (HM3 suffix), halogen-free RoHS compliance, and low clamping ratio (VC/VBR ≈ 1.45) enabling robust protection of 5 V logic interfaces against ESD and load dump.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, with cathode-banded polarity and glass-passivated junction for stable surge response. Its thermal resistance (RθJA = 120 °C/W) and maximum junction temperature (150 °C) support operation in automotive under-hood environments when mounted on 5.0 mm × 5.0 mm copper pads.
The device delivers 35.7 A peak pulse current (IPPM) at 11.2 V clamping voltage with <1 ps response time, and exhibits 0.061 %/°C temperature coefficient of VBR - ensuring predictable breakdown drift across -55 °C to +150 °C operating range. It meets J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse working voltage before leakage exceeds 500 μA; sets upper limit for safe DC bias on protected line. |
| VBR min/max | 7.22 V / 7.98 V at 10 mA - Confirmed breakdown window ensures reliable turn-on without premature conduction during normal operation. |
| VC @ IPPM | 11.2 V at 35.7 A - Clamping voltage under standardized 10/1000 μs surge; defines worst-case overvoltage seen by downstream IC. |
| PPPM | 400 W - Peak pulse power handling per 10/1000 μs waveform; enables protection against ISO 7637-2 Pulse 1/2a/5a transients. |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports transient immunity in power rail applications. |
| TJ max | +150 °C - Maximum junction temperature; validates suitability for AEC-Q101 automotive grade operation. |
| Package | SMA (DO-214AC) - Surface-mount outline with 2.54 mm lead pitch; compatible with automated placement and reflow soldering. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, MSL Level 1, 260 °C peak reflow profile. Cathode identified by black band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-impedance return path; completes clamping loop during transient events. |
| Cathode | High-side connection point | Connected to protected line (e.g., 5 V supply or I/O); conducts avalanche current when Vline > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including body control modules and sensor interfaces per stress test requirements. |
| Halogen-free & RoHS-compliant | HM3 suffix confirms compliance with JEDEC J-STD-609A Class 1 halogen-free definition and EU RoHS Directive 2011/65/EU. |
| 400 W peak pulse power | Withstands repetitive 10/1000 μs surges at 0.01% duty cycle - sufficient for CAN/LIN bus and 12 V power rail protection. |
| Low clamping ratio (VC/VBR) | ~1.45 - Minimizes overvoltage stress on protected ICs compared to higher-ratio alternatives, improving system reliability. |
| Fast response time | <1 ps - Limits voltage overshoot during ESD events (IEC 61000-4-2 ±8 kV contact), preventing latch-up in CMOS inputs. |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceiver inputs from load dump and battery reversal transients in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between LIN pin and ground, activated within picoseconds during overvoltage events. Use Value: Limits voltage to ≤11.2 V during 35.7 A surge, preventing damage to MAX13051 or TLE6250 transceivers rated for 16 V absolute max. |
Use Scenario: Safeguarding analog output (4–20 mA) lines of pressure sensors exposed to field wiring inductive kickback. IC Role / Device Role / Timing Role: Standoff-connected TVS on sensor output node, conducting only during >7.22 V transients while leaking <500 μA at 6.5 V. Use Value: Maintains signal integrity below 6.5 V DC while clamping 100 V spikes to 11.2 V, preserving ADC accuracy and isolator lifetime. |
| Consumer USB Power Input Protection | Telecom PoE Interface Clamp |
|
Use Scenario: Secondary overvoltage protection on 5 V USB VBUS line after primary fuse and upstream TVS in portable docking stations. IC Role / Device Role / Timing Role: Final-stage unidirectional clamp referenced to ground, triggered by ESD or hot-plug overshoot exceeding 7.22 V. Use Value: Adds margin beyond primary protection with 11.2 V clamping ceiling, ensuring connected SoCs (e.g., Rockchip RK3399) remain within 12 V absolute max rating. |
Use Scenario: Data-line surge suppression on IEEE 802.3af/at PoE midspan injectors where DC bias coexists with Ethernet signals. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; this unidirectional part applied on DC bias rails (e.g., PSE output) with cathode to +48 V. Use Value: Handles 400 W surges while maintaining <500 μA leakage at 36 V nominal, avoiding false triggering during PoE negotiation and classification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5AHE3/I | Same electrical specs, but RoHS-compliant without halogen-free certification (E3 vs HM3). | Approved for commercial/industrial use; not qualified to AEC-Q101 or halogen-free standards. | Select when automotive qualification or halogen-free requirement is not mandated. |
| SMAJ6.5A-M3/5A | Identical electrical parameters and HM3 halogen-free compliance, but packaged in 13" reel (5A code) instead of 7" reel (I code). | No functional difference; only packaging and quantity variation (7500 vs 1800 units/reel). | Choose based on production volume and SMT line feeder compatibility. |
Compared with SMAJ6.5AHM3/I, the SMAJ6.5AHE3/I lacks AEC-Q101 validation and halogen-free status, limiting automotive use; SMAJ6.5A-M3/5A offers identical performance but differs only in reel size and quantity - making it suitable for high-volume manufacturing without design change.
Availability
SMAJ6.5AHM3/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer USB power input stages, and telecom PoE bias rail protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMAJ6.5AHM3/I 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, TVS devices, and optoelectronics with emphasis on reliability and automotive-grade validation.
The SMAJ series was engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where 400 W pulse handling and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMAJ6.5AHM3/I at its rated peak pulse current?
The SMAJ6.5AHM3/I clamps to a maximum of 11.2 V at its rated peak pulse current of 35.7 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024, Document Number 88390. The clamping voltage directly determines the overvoltage stress imposed on downstream components during surge events, making it critical for validating IC survivability in designs using SMAJ6.5AHM3/I.
Is SMAJ6.5AHM3/I qualified for automotive applications?
Yes, SMAJ6.5AHM3/I is AEC-Q101 qualified, as indicated by the "HM3" suffix in its ordering code - denoting halogen-free, RoHS-compliant, and AEC-Q101 validated construction. This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD, confirming suitability for automotive body electronics, infotainment power supplies, and sensor interface circuits where SMAJ6.5AHM3/I is deployed.
What does the "HM3" suffix mean in SMAJ6.5AHM3/I?
The "HM3" suffix in SMAJ6.5AHM3/I specifies halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinct from "E3" (RoHS only) or "HE3" (AEC-Q101 + RoHS, but not halogen-free). Per Vishay's ordering information, HM3 parts meet JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1, ensuring SMAJ6.5AHM3/I is suitable for lead-free reflow and automotive production environments.
How does SMAJ6.5AHM3/I differ from bidirectional SMAJ6.5CA variants?
SMAJ6.5AHM3/I is unidirectional, with cathode marked by a band and intended for DC-biased lines like 5 V power rails or single-ended signal paths. In contrast, SMAJ6.5CA is bidirectional, has no polarity marking, and suppresses surges in both directions - suited for AC-coupled or differential lines. Their VBR and VC values differ: SMAJ6.5AHM3/I has VBR = 7.22–7.98 V, while SMAJ6.5CA has symmetric breakdown but higher ID leakage at low VWM, making SMAJ6.5AHM3/I preferable for low-leakage DC protection.
What is the thermal resistance of SMAJ6.5AHM3/I, and how does it affect layout?
SMAJ6.5AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes no additional heatsinking; exceeding 3.3 W steady-state power dissipation requires thermal derating per Figure 2 in the datasheet. For reliable operation in automotive ambient temperatures up to 125 °C, PCB layout must allocate adequate copper area to keep junction temperature below 150 °C - a key constraint when applying SMAJ6.5AHM3/I in high-power transient scenarios.
SMAJ6.5AHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ6.5AHM3/I FAQ
1.How can I place an order for SMAJ6.5AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.5AHM3/I 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 SMAJ6.5AHM3/I reliable?
The price and inventory of SMAJ6.5AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ6.5AHM3/I is usually 5 days.
3.What payment methods are accepted for SMAJ6.5AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.5AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.5AHM3/I?
SMAJ6.5AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.5AHM3/I 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 SMAJ6.5AHM3/I?
For technical support, including SMAJ6.5AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.5AHM3/I requirements.
6.How does Aetrix verify that SMAJ6.5AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMAJ6.5AHM3/I 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 SMAJ6.5AHM3/I meets industry standards.
7.What is the process for return or replacement of SMAJ6.5AHM3/I?
All SMAJ6.5AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.5AHM3/I, 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 SMAJ6.5AHM3/I part is unused and in its original packaging.
Return procedure for SMAJ6.5AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ6.5AHM3/I Tags
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