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Vishay General Semiconductor - Diodes Division SM6T220AHM3_B/I
- Part No.:
- SM6T220AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T220AHM3_B/I.pdf
- Description:
- 600W,220V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,762
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Product details
Overview
SM6T220AHM3_B/I from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor in SMB (DO-214AA) package, with 220 V breakdown voltage (VBR), 328 V maximum clamping voltage (VC) at 2.0 A IPPM, 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualification for automotive electronics protection.
For engineers reviewing the SM6T220AHM3_B/I datasheet, SM6T220AHM3_B/I pinout, SM6T220AHM3_B/I application, or SM6T220AHM3_B/I equivalent, key selection criteria include clamping performance under 10/1000 μs surge, unidirectional polarity with cathode band marking, halogen-free RoHS compliance, and thermal resistance (RθJA = 100 °C/W) for PCB-level transient suppression in high-reliability systems.
Technical Context
This device operates as a unidirectional TVS diode, designed to clamp transient overvoltages before they damage downstream ICs or MOSFETs. Its glass-passivated junction ensures stable breakdown behavior, while low inductance supports fast response to ESD and switching-induced spikes.
The SM6T220AHM3_B/I is rated for 150 °C maximum junction temperature and derated linearly above 25 °C ambient per Fig. 2. It meets J-STD-020 MSL Level 1 (260 °C peak reflow) and is qualified to AEC-Q101 for automotive under-hood and powertrain applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 209 V / 231 V at 1.0 mA test current - defines precise voltage threshold where clamping initiates |
| VWM | 188 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 328 V at 2.0 A (10/1000 μs) - peak clamped voltage seen by protected circuit during standard surge event |
| PPPM | 600 W - peak transient energy absorption capability under standardized 10/1000 μs waveform |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, critical for power derating on standard 0.2" × 0.2" copper pads |
| TJ max | +150 °C - maximum allowable junction temperature, enabling operation in under-hood automotive environments |
| Polarity | Unidirectional - cathode marked with band; blocks forward conduction, clamps reverse transients only |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient clamping node | Connected to protected line; conducts during overvoltage to shunt current to ground |
| Anode | Reference/return path | Typically tied to system ground or low-impedance return; completes clamping loop during surge |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges in automotive ECUs |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock per stress test requirements |
| Low inductance SMB package | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving clamping fidelity |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal and electrical stress |
| MSL Level 1 (260 °C) | Supports standard lead-free reflow without preconditioning, reducing manufacturing complexity |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power rails and microcontroller supply inputs in engine control units against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between battery rail and LDO input, absorbing >100 V spikes within nanoseconds. Use Value: Limits voltage seen by downstream regulators to ≤328 V, preventing latch-up or permanent damage during ISO 16750-2 load dump events. | Use Scenario: Safeguarding analog front-end inputs of industrial pressure/temperature sensors connected to long cables in factory automation systems. IC Role / Device Role / Timing Role: Line-side transient suppressor on sensor signal lines exposed to relay switching noise and EFT bursts. Use Value: Clamps induced surges to <330 V before reaching precision ADC inputs, preserving measurement integrity and avoiding reset events. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Securing 48 V DC input of PoE-powered network switches and base station radios against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main DC input stage, coordinated with upstream fuses and secondary filtering. Use Value: Absorbs up to 600 W of transient energy without degradation, maintaining system uptime during Category C2/C3 surge events per IEC 61000-4-5. | Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., washing machine drum drives). IC Role / Device Role / Timing Role: Freewheeling TVS across motor terminals, diverting back-EMF spikes away from H-bridge MOSFETs. Use Value: Prevents MOSFET avalanche failure by clamping flyback voltages to 328 V, extending drive-stage lifetime under repeated commutation cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ220A-E3/5B | Same VBR (209–231 V), but lower PPPM (400 W); SMA package (DO-214AC), higher RθJA (140 °C/W) | Limited to lower-energy transients; less suitable for automotive load dump where 600 W margin is required | Choose when cost sensitivity outweighs surge margin and board space allows larger pad layout for thermal relief |
| 1.5SMC220A | Same VBR/VC, higher PPPM (1500 W), but SMC (DO-214AB) package - 2.5× footprint area and 3× height vs. SMB | Better for high-energy industrial surges but incompatible with dense automotive PCB layouts | Select only if system-level testing confirms need for >600 W clamping and mechanical envelope permits larger package |
Compared with SMAJ220A-E3/5B and 1.5SMC220A, SM6T220AHM3_B/I delivers optimal balance of 600 W surge capacity, compact SMB footprint, AEC-Q101 qualification, and halogen-free compliance - making it the preferred choice for space-constrained, automotive-qualified 24/48 V system protection.
Availability
SM6T220AHM3_B/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom DC power inputs, and consumer appliance motor drives requiring stable component supply with full traceability and lifecycle support.
Supply support for SM6T220AHM3_B/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, efficiency, and application-specific performance.
The SM6T Series is engineered for high-reliability transient suppression in harsh environments - specifically targeting automotive, industrial, and telecom applications where consistent clamping, AEC-Q101 validation, and compact surface-mount form factor are mandatory.
FAQ
What is the breakdown voltage range of the SM6T220AHM3_B/I?
The SM6T220AHM3_B/I has a guaranteed breakdown voltage (VBR) range of 209 V to 231 V at 1.0 mA test current, measured per JEDEC standards. This tight tolerance ensures predictable clamping onset across production lots and temperature ranges, critical for protecting 24 V and 48 V systems where overvoltage margins are narrow. The SM6T220AHM3_B/I maintains this specification under AEC-Q101 stress conditions.
Is the SM6T220AHM3_B/I suitable for automotive applications?
Yes, the SM6T220AHM3_B/I is AEC-Q101 qualified (denoted by HM3 suffix) and explicitly rated for automotive use, including under-hood environments. It passes temperature cycling, high-temperature operating life, and mechanical shock tests per AEC-Q101. Its 150 °C TJ max and MSL Level 1 reflow compatibility make SM6T220AHM3_B/I appropriate for engine control modules and body electronics.
What does the "HM3_B/I" suffix indicate in SM6T220AHM3_B/I?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification; "B" is the revision code; "I" indicates packaging in 13-inch tape-and-reel (3200 units). This full ordering code ensures traceability to Vishay's qualified automotive-grade production lot, distinguishing SM6T220AHM3_B/I from commercial-grade variants like SM6T220A-M3/5B.
How does the clamping voltage of SM6T220AHM3_B/I compare to its breakdown voltage?
The SM6T220AHM3_B/I clamps at 328 V (VC) when subjected to a 2.0 A peak pulse (10/1000 μs), which is ~48 % above its minimum VBR of 209 V. This overvoltage margin is typical for 600 W TVS devices and ensures safe operation of downstream components rated for ≤350 V. The SM6T220AHM3_B/I maintains this clamping performance across -65 °C to +150 °C junction temperature.
Can SM6T220AHM3_B/I be used in bidirectional configurations?
No, SM6T220AHM3_B/I is unidirectional only, as confirmed by its part number structure (no "CA" suffix) and cathode band marking. Bidirectional variants require the "CA" suffix (e.g., SM6T220CA). Using SM6T220AHM3_B/I in bidirectional circuits would result in forward conduction during negative transients, potentially damaging the device or failing to protect the circuit.
SM6T220AHM3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 188V
- Voltage - Breakdown (Min):
- 209V
- Voltage - Clamping (Max) @ Ipp:
- 328V
- Current - Peak Pulse (10/1000µs):
- 2A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SM6T220AHM3_B/I FAQ
1.How can I place an order for SM6T220AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T220AHM3_B/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 SM6T220AHM3_B/I reliable?
The price and inventory of SM6T220AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T220AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SM6T220AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T220AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T220AHM3_B/I?
SM6T220AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T220AHM3_B/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 SM6T220AHM3_B/I?
For technical support, including SM6T220AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T220AHM3_B/I requirements.
6.How does Aetrix verify that SM6T220AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SM6T220AHM3_B/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 SM6T220AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SM6T220AHM3_B/I?
All SM6T220AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SM6T220AHM3_B/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 SM6T220AHM3_B/I part is unused and in its original packaging.
Return procedure for SM6T220AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T220AHM3_B/I Tags
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Diodes Incorporated
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