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Vishay General Semiconductor - Diodes Division 1.5SMC22AHM3/I
- Part No.:
- 1.5SMC22AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC22AHM3/I.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,086
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Product details
Overview
1.5SMC22AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, designed for high-energy surge protection. It features a 22 V breakdown voltage (VBR = 20.9–23.1 V at IT = 1.0 mA), 18.8 V stand-off voltage (VWM), and clamps transients to ≤30.6 V at 49.0 A peak pulse current (10/1000 μs), delivering 1500 W peak pulse power in automotive and industrial power line protection.
For engineers reviewing the 1.5SMC22AHM3/I datasheet, 1.5SMC22AHM3/I pinout, 1.5SMC22AHM3/I application, or 1.5SMC22AHM3/I equivalent, this device is selected for robust overvoltage protection of DC power rails, MOSFET gate drivers, and sensor supply lines where fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.32), and AEC-Q101 qualification are required.
Technical Context
The 1.5SMC22AHM3/I employs a glass-passivated silicon junction optimized for transient suppression under repetitive 10/1000 μs surges at 0.01% duty cycle. Its unidirectional polarity uses a cathode band marking and exhibits low incremental surge resistance (typical Rdyn < 0.3 Ω) and excellent clamping linearity up to rated IPPM.
Thermally, it supports operation from −65 °C to +150 °C with RθJA = 75 °C/W (on 8.0 mm × 8.0 mm copper pads) and RθJL = 15 °C/W, enabling reliable performance in compact automotive ECUs and industrial motor drives without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 20.9 V / 23.1 V at IT = 1.0 mA - defines precise breakdown threshold for predictable clamping onset |
| VWM | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | ≤30.6 V at 49.0 A (10/1000 μs) - ensures protected circuitry sees no more than 30.6 V during worst-case surge |
| PPPM | 1500 W - enables handling of high-energy lightning-induced transients per IEC 61000-4-5 Level 4 |
| IFSM | 200 A (8.3 ms half-sine) - supports single-event surge immunity in DC bus protection |
| Junction Temp Range | −65 °C to +150 °C - qualified for under-hood automotive and industrial ambient conditions |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint and 2.62 mm height |
Pinout & Package
Package: SMC (DO-214AB), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection in unidirectional configuration | Connects to protected line; clamps when voltage exceeds VWM, shunting surge current to ground |
| Anode (unmarked end) | Reference/ground return path | Must be tied to system ground or low-impedance return; forms current path during transient conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS power domains |
| 1500 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive equipment |
| Low clamping voltage (VC/VBR ≈ 1.32) | Minimizes stress on downstream ICs by limiting overvoltage excursion during clamping |
| Fast response time (<1 ns) | Engages before sensitive components experience damaging overvoltage, critical for MOSFET gate protection |
| Halogen-free, RoHS-compliant (HM3 suffix) | Complies with environmental regulations for global OEM supply chains and end-of-life recycling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 18.8 V. Use Value: Limits rail voltage to ≤30.6 V during 1500 W transients, preventing damage to microcontrollers and CAN transceivers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC inputs against ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to divert sub-100 ns ESD pulses before reaching signal conditioning circuitry. Use Value: Sub-1 ns response and ≤30.6 V clamping preserve signal integrity and prevent ADC saturation or op-amp latch-up. |
| MOSFET Gate Driver Protection | DC Motor Drive Power Stage Protection |
Use Scenario: Shielding N-channel MOSFET gate-source terminals from Miller-induced voltage spikes during high-dI/dt switching. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS across gate and source to clamp negative-going transients below −20 V. Use Value: Prevents gate oxide breakdown while maintaining fast switching speed due to minimal parasitic capacitance. |
Use Scenario: Suppressing inductive kickback from brushed DC motors during PWM commutation in factory automation drives. IC Role / Device Role / Timing Role: TVS placed across motor terminals or H-bridge supply rails to absorb energy from L·di/dt spikes. Use Value: 200 A non-repetitive surge rating handles repeated motor stall currents without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/57T | Lower peak power (400 W), SMA package (smaller footprint, higher RθJA = 110 °C/W) | Suitable only for lower-energy transients (IEC 61000-4-2 ESD, not Level 4 surge) | Select when space-constrained and surge energy ≤400 W; verify thermal margin on PCB |
| 1.5KE22A | Through-hole DO-201 package, same VBR/VC, but slower mounting and no AEC-Q101 qualification | Used in legacy industrial power supplies where automated SMT is not available | Choose for prototyping or repair where through-hole assembly is mandated; avoid for new automotive designs |
Compared with SMAJ22A-E3/57T and 1.5KE22A, the 1.5SMC22AHM3/I delivers 3.75× higher surge power in an AEC-Q101-qualified SMT package, enabling compact, high-reliability protection in automotive and industrial systems where both energy handling and qualification are mandatory.
Availability
1.5SMC22AHM3/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, MOSFET gate driver safeguarding, and DC motor drive power stage protection requiring stable component supply and long-term lifecycle support.
Supply support for 1.5SMC22AHM3/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, and protection devices with emphasis on reliability, efficiency, and application-specific qualification.
The 1.5SMC Series was developed for high-power, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and 1500 W surge capability are essential.
FAQ
What is the breakdown voltage tolerance for 1.5SMC22AHM3/I?
The 1.5SMC22AHM3/I has a specified breakdown voltage range of 20.9 V to 23.1 V at test current IT = 1.0 mA, representing ±5% tolerance around the nominal 22 V rating. This tight VBR window ensures consistent clamping behavior across production lots and supports precise overvoltage threshold design in safety-critical circuits.
Is 1.5SMC22AHM3/I suitable for bidirectional surge protection?
No, the 1.5SMC22AHM3/I is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay offers the 1.5SMC22CA variant. Using 1.5SMC22AHM3/I in AC or floating applications would result in forward conduction during negative half-cycles, potentially causing failure.
What does the "HM3" suffix mean in 1.5SMC22AHM3/I?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. The "H" indicates AEC-Q101 compliance, "M" signifies halogen-free molding compound, and "3" confirms RoHS compliance. The "/I" denotes packaging in 13-inch tape-and-reel (3500 units per reel), suitable for high-volume SMT assembly.
How does the clamping voltage of 1.5SMC22AHM3/I compare to its breakdown voltage?
The 1.5SMC22AHM3/I clamps to ≤30.6 V at 49.0 A (10/1000 μs), yielding a clamping ratio (VC/VBR) of approximately 1.32. This low ratio-enabled by low dynamic impedance-ensures protected circuits experience minimal overvoltage overshoot, critical for safeguarding 3.3 V or 5 V logic interfaces powered from a 24 V rail.
Can 1.5SMC22AHM3/I replace older 1.5SMC22A variants in existing designs?
Yes, the 1.5SMC22AHM3/I is a direct functional and mechanical replacement for earlier 1.5SMC22A versions (e.g., E3/M3), retaining identical electrical specs, SMC (DO-214AB) package dimensions, and pinout. Its added AEC-Q101 qualification and halogen-free materials make it suitable for upgrading legacy automotive and industrial designs without layout changes.
1.5SMC22AHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18.8V
- Voltage - Breakdown (Min):
- 20.9V
- Voltage - Clamping (Max) @ Ipp:
- 30.6V
- Current - Peak Pulse (10/1000µs):
- 49A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
1.5SMC22AHM3/I FAQ
1.How can I place an order for 1.5SMC22AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC22AHM3/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 1.5SMC22AHM3/I reliable?
The price and inventory of 1.5SMC22AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC22AHM3/I is usually 5 days.
3.What payment methods are accepted for 1.5SMC22AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC22AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC22AHM3/I?
1.5SMC22AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC22AHM3/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 1.5SMC22AHM3/I?
For technical support, including 1.5SMC22AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC22AHM3/I requirements.
6.How does Aetrix verify that 1.5SMC22AHM3/I is sourced from the original manufacturer or authorized distributors?
All 1.5SMC22AHM3/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 1.5SMC22AHM3/I meets industry standards.
7.What is the process for return or replacement of 1.5SMC22AHM3/I?
All 1.5SMC22AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC22AHM3/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 1.5SMC22AHM3/I part is unused and in its original packaging.
Return procedure for 1.5SMC22AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5SMC22AHM3/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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