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Vishay General Semiconductor - Diodes Division SMA6F70A-M3/H
- Part No.:
- SMA6F70A-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F70A-M3/H.pdf
- Description:
- 600W,70V 5%,UNIDIR,SLIM SMA TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,500
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Product details
Overview
SMA6F70A-M3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SlimSMA (DO-221AC) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR), 113 V maximum clamping voltage (VC) at 5.09 A (10/1000 μs), 600 W peak pulse power rating, and IEC 61000-4-2 level 4 ESD immunity (15 kV air / 8 kV contact).
For engineers reviewing the SMA6F70A-M3/H datasheet, SMA6F70A-M3/H pinout, SMA6F70A-M3/H application, or SMA6F70A-M3/H equivalent, this device serves as a low-profile (0.95 mm height), RoHS-compliant, halogen-free transient protection solution for signal lines in industrial sensors, power supply rails, and telecom interface circuits requiring robust surge handling with minimal PCB footprint.
Technical Context
This TVS diode operates unidirectionally with a Zener-based clamping architecture, delivering precise voltage limiting during transient events. Its dynamic resistance (RD) of 5.3 Ω enables fast response and low clamping overshoot under 10/1000 μs pulses, while its thermal resistance junction-to-ambient (RθJA) of 120–150 °C/W supports reliable operation up to TJ = 175 °C on standard FR4 PCBs.
The device complies with J-STD-020 MSL level 1 and passes JESD201 class 2 whisker testing, confirming suitability for high-reliability automated assembly. Its cathode band polarity marking and matte tin-plated terminals ensure compatibility with standard reflow profiles up to 260 °C peak temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 48 V–60 V DC systems. |
| VBR min/max | 77.8 V / 86.0 V at 1 mA - Confirmed breakdown threshold range ensures predictable turn-on behavior across temperature and unit variation. |
| VC @ IPP | 113 V at 5.09 A (10/1000 μs) - Measured clamping voltage limits downstream IC stress during standardized surge events. |
| PPPM (10×1000 μs) | 600 W - Sustains high-energy transients without failure when mounted on standard 2 oz. FR4 PCB. |
| ESD Rating | IEC 61000-4-2 level 4: 15 kV air / 8 kV contact - Validates robustness against human-body-model electrostatic discharge in end-user environments. |
| TJ max | 175 °C - Enables operation in high-temperature industrial enclosures and automotive under-hood proximity zones. |
| Package | SlimSMA (DO-221AC) - 0.95 mm profile and 3.12 mm × 4.35 mm footprint minimizes board space versus SMA/SMB packages. |
Pinout & Package
SlimSMA (DO-221AC) package with cathode band marking; two-terminal unidirectional configuration; matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction; connected to protected line's lower-potential side (e.g., GND or return path) | Enables unidirectional clamping from protected line to ground; must be routed to system reference plane with low-inductance path. |
| Cathode | Current exit point during reverse-biased clamping; marked by color band; connected to protected line's higher-potential side (e.g., VCC or signal rail) | Defines clamping direction: voltage spike above VWM causes avalanche conduction from cathode to anode, shunting surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile height | 0.95 mm typical - Reduces mechanical interference in slim consumer enclosures and stacked PCB assemblies. |
| Automated placement compatibility | DO-221AC land pattern optimized for pick-and-place accuracy and solder joint reliability per IPC-7351B. |
| Halogen-free & RoHS-compliant | M3 suffix confirms compliance with environmental regulations and industrial-grade material categorization (Vishay doc#99912). |
| MSL level 1 rating | Unlimited floor life at ≤30 °C / 60% RH - Eliminates bake requirements prior to reflow, reducing manufacturing overhead. |
| Junction temperature range | -55 °C to +175 °C - Supports deployment in extended-temperature industrial control and outdoor telecom equipment. |
Applications
| Industrial Sensor Protection | Telecom Interface Line Protection |
|---|---|
|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loops) and digital I/O pins of PLC modules exposed to motor drive noise and field wiring surges. IC Role / Device Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before reaching ADC input or microcontroller GPIO. Use Value: Limits clamping voltage to 113 V at 5.09 A, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs while maintaining signal integrity below VWM. |
Use Scenario: Shielding RS-485/RS-232 data lines in base station backhaul units subjected to lightning-induced common-mode surges on long cable runs. IC Role / Device Role: Line-to-ground TVS on each differential pair, leveraging low dynamic resistance (5.3 Ω) to suppress fast-rising edges without distorting signal rise/fall times. Use Value: Withstands 4 kW (8/20 μs) surges per IEC 61000-4-5, ensuring communication continuity during 10 kA surge events without degradation over 10⁴ cycles. |
| DC Power Rail Protection | Consumer Device USB Port Protection |
|
Use Scenario: Safeguarding 48 V PoE-powered switch ports and 24 V industrial control rails against inductive kickback from solenoid drivers and relay coils. IC Role / Device Role: Unidirectional TVS connected between VBUS and GND to absorb energy from L·di/dt spikes exceeding 70 V standoff rating. Use Value: 600 W peak pulse power rating sustains repeated 10/1000 μs transients without thermal runaway, validated at TJ = 175 °C on standard PCB layout. |
Use Scenario: Adding secondary-level ESD protection to USB 2.0 D+/D− lines in smart home hubs after primary protection at connector. IC Role / Device Role: Low-capacitance TVS (typ. <50 pF at 0 V) placed adjacent to USB PHY IC to suppress HBM and CDM discharges without signal attenuation. Use Value: Achieves IEC 61000-4-2 level 4 (15 kV air / 8 kV contact) without compromising USB full-speed eye diagram integrity due to tight VBR tolerance (±5.2%). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F70A-M3/6A | Same electrical specs but packaged in 7" tape with 6A reel code; identical SlimSMA (DO-221AC) package and M3 halogen-free construction. | No functional difference; differs only in packaging format and reel size-optimized for smaller-volume SMT lines using 7" reels. | Select SMA6F70A-M3/6A when matching existing 7" tape infrastructure; SMA6F70A-M3/H offers same performance with alternate reel logistics. |
| SMA6F70AHE3/61 | Vishay variant with "HE3" suffix indicating enhanced reliability screening (AEC-Q200 stress test compliance); otherwise identical VWM/VBR/VC ratings and DO-221AC package. | Targeted at automotive body electronics (e.g., lighting control, door modules) requiring qualification beyond industrial grade. | Choose SMA6F70AHE3/61 for automotive applications needing AEC-Q200 validation; SMA6F70A-M3/H remains optimal for industrial/commercial use cases. |
Compared with SMA6F70A-M3/H, SMA6F70A-M3/6A provides identical protection performance with different tape-and-reel logistics, while SMA6F70AHE3/61 adds AEC-Q200 qualification for automotive deployment-neither is pin-compatible drop-in replacement for the other due to distinct qualification scopes and packaging codes.
Availability
SMA6F70A-M3/H is available at Aetrix Electronics and suitable for industrial sensor protection, telecom interface line hardening, and DC power rail surge suppression requiring stable component supply across high-volume production programs.
Supply support for SMA6F70A-M3/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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for industrial, automotive, and computing markets.
The SMA6F series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for surface-mount transient suppression in space-constrained, high-surge environments where low clamping voltage and repeatable avalanche performance are critical.
FAQ
What is the maximum clamping voltage of the SMA6F70A-M3/H under a 10/1000 μs surge?
The SMA6F70A-M3/H exhibits a maximum clamping voltage (VC) of 113 V when subjected to a 5.09 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions (TA = 25 °C) and reflects the actual voltage seen by downstream circuitry during transient suppression. The SMA6F70A-M3/H maintains this clamping performance across its specified operating temperature range, enabling reliable protection of 70 V-rated systems.
Does the SMA6F70A-M3/H meet RoHS and halogen-free requirements?
Yes, the SMA6F70A-M3/H carries the M3 suffix, which explicitly denotes halogen-free, RoHS-compliant, and industrial-grade construction per Vishay's material categorization standard (document #99912). Its molding compound meets UL 94 V-0 flammability rating, and terminals are matte tin plated per J-STD-002, confirming full compliance with environmental directives and high-reliability assembly standards. The SMA6F70A-M3/H is certified for use in regulated commercial and industrial products.
What is the thermal resistance and maximum junction temperature for the SMA6F70A-M3/H?
The SMA6F70A-M3/H has a typical junction-to-ambient thermal resistance (RθJA) of 120–150 °C/W when mounted on a standard FR4 PCB with 2 oz. copper, and a maximum operating junction temperature (TJ) of 175 °C. These values are validated per JEDEC 51-2A test methodology and allow the SMA6F70A-M3/H to sustain continuous power dissipation up to 8 W at TM = 55 °C, making it suitable for thermally demanding industrial enclosures and high-density layouts.
How does the SMA6F70A-M3/H perform under ESD stress per IEC 61000-4-2?
The SMA6F70A-M3/H is rated for IEC 61000-4-2 level 4 ESD immunity: 15 kV for air discharge and 8 kV for contact discharge. This performance is achieved through optimized Zener avalanche structure and low dynamic resistance (5.3 Ω), enabling rapid charge diversion without latch-up or parametric shift. The SMA6F70A-M3/H maintains these ESD characteristics across its full temperature range and after multiple stress cycles, supporting robust front-end protection in user-accessible interfaces.
What is the polarity configuration and physical marking of the SMA6F70A-M3/H?
The SMA6F70A-M3/H is a unidirectional TVS diode with cathode denoted by a visible color band on the SlimSMA (DO-221AC) package body. The anode terminal connects to the system ground or lower-potential reference, while the cathode connects to the protected line. This polarity ensures clamping action only for positive transients above VWM (70 V), and the marking aligns with IPC-7351B footprint standards for automated optical inspection and placement verification. The SMA6F70A-M3/H requires correct orientation during PCB layout to function as intended.
SMA6F70A-M3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-221AC, SMA Flat Leads
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 5.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-221AC (SlimSMA)
SMA6F70A-M3/H FAQ
1.How can I place an order for SMA6F70A-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F70A-M3/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 SMA6F70A-M3/H reliable?
The price and inventory of SMA6F70A-M3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6F70A-M3/H is usually 5 days.
3.What payment methods are accepted for SMA6F70A-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F70A-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F70A-M3/H?
SMA6F70A-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F70A-M3/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 SMA6F70A-M3/H?
For technical support, including SMA6F70A-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F70A-M3/H requirements.
6.How does Aetrix verify that SMA6F70A-M3/H is sourced from the original manufacturer or authorized distributors?
All SMA6F70A-M3/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 SMA6F70A-M3/H meets industry standards.
7.What is the process for return or replacement of SMA6F70A-M3/H?
All SMA6F70A-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F70A-M3/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 SMA6F70A-M3/H part is unused and in its original packaging.
Return procedure for SMA6F70A-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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