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Vishay General Semiconductor - Diodes Division SM15T22AHM3_A/H
- Part No.:
- SM15T22AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T22AHM3_A/H.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,457
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Product details
Overview
SM15T22AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 30.6 V maximum clamping voltage at 49.0 A IPPM, and 18.8 V stand-off voltage. It protects MOSFETs, ICs, and sensor signal lines against lightning-induced and inductive-switching transients in automotive and industrial power electronics.
For engineers reviewing the SM15T22AHM3_A/H datasheet, SM15T22AHM3_A/H pinout, SM15T22AHM3_A/H application, or SM15T22AHM3_A/H equivalent, key selection criteria include verified clamping performance at 49.0 A, AEC-Q101 qualification status, halogen-free RoHS compliance, and SMC package thermal resistance (RθJL = 15 °C/W) for high-reliability board-level surge protection.
Technical Context
This device operates as a unidirectional avalanche diode with glass-passivated junction, designed to clamp transient overvoltages before they damage downstream circuitry. Its breakdown voltage is specified at 20.9–23.1 V (IT = 1.0 mA), and it exhibits low dynamic impedance under surge conditions due to optimized chip geometry and low-inductance SMC packaging.
The SM15T22AHM3_A/H is rated for TJ = –65 °C to +150 °C and features MSL Level 1 moisture sensitivity with 260 °C lead-free reflow compatibility. Its failure mode under overstress is short-circuit, enabling safe system-level fault containment without open-circuit risk.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - sustains lightning-surge energy without degradation when mounted on 8.0 mm × 8.0 mm copper pads |
| Stand-off Voltage (VWM) | 18.8 V - maximum continuous reverse voltage before leakage exceeds 1.0 μA, compatible with 18 V rail systems |
| Breakdown Voltage (VBR) | 20.9–23.1 V at 1.0 mA - defines precise avalanche initiation threshold for predictable clamping onset |
| Clamping Voltage (VC) | 30.6 V at 49.0 A IPPM - limits transient voltage seen by protected ICs to ≤30.6 V during worst-case surge |
| Peak Pulse Current (IPPM) | 49.0 A (10/1000 μs) - quantifies maximum surge current the device can safely divert without failure |
| Junction-to-Lead Thermal Resistance | 15 °C/W - enables efficient heat transfer to PCB copper, critical for repeated surge duty cycles |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to system ground or low-side reference; forms cathode-anode path for transient shunting |
| Cathode | Current exit terminal during reverse-biased clamping | Banded end; connects to protected line (e.g., 18 V supply or sensor output) to clamp surges toward ground |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power rating | Enables robust protection against IEC 61000-4-5 Level 4 (4 kV) surges without derating in standard layouts |
| Glass passivated junction | Ensures stable VBR over lifetime and improved humidity resistance vs. epoxy-passivated alternatives |
| Low clamping ratio (VC/VBR ≈ 1.32) | Minimizes voltage overshoot during fast transients, reducing stress on 3.3 V/5 V logic interfaces |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without popcorn cracking or parametric shift |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics where field failure is unacceptable |
Applications
| Automotive Power Distribution | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power rails feeding ECUs, lighting modules, and window lift controllers from load-dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between supply rail and chassis ground to clamp positive transients only. Use Value: Clamps 18.8 V rail to ≤30.6 V during 49 A surges, preserving CAN transceivers and microcontroller I/O integrity per ISO 7637-2. |
Use Scenario: Safeguarding analog input channels of PLC analog modules connected to 4–20 mA sensors near AC contactors and solenoids. IC Role / Device Role / Timing Role: Standoff-rated TVS on each signal line to absorb switching noise and prevent ADC saturation. Use Value: Limits induced transients to <31 V while maintaining <1 μA leakage at 18.8 V, ensuring measurement accuracy and long-term stability. |
| Telecom Base Station DC Feeds | Consumer Appliance Power Supply Inputs |
Use Scenario: Secondary-side surge protection on -48 V DC distribution boards feeding RF amplifiers and backhaul radios. IC Role / Device Role / Timing Role: Unidirectional suppressor referenced to negative rail, clamping positive spikes toward return path. Use Value: Withstands repeated 1500 W pulses without parameter drift, meeting GR-1089-CORE telecom immunity requirements. |
Use Scenario: Input-stage protection for switch-mode power supplies in washing machines and HVAC controllers exposed to mains-borne transients. IC Role / Device Role / Timing Role: First-line defense on primary-side rectifier output, shunting energy before bulk capacitor. Use Value: 30.6 V clamping prevents overvoltage stress on 25 V-rated electrolytics and ensures EN 61000-4-5 compliance at system level. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/57T | Lower PPPM (400 W), same VWM (18.8 V), higher VC (35.5 V at 11.3 A), SMA package (higher RθJA) | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy threats like ESD or local switching noise | Select when cost or board space is constrained and surge threat level is ≤1 kW |
| SMCJ22A-M3/57T | Same PPPM (1500 W), identical VWM/VBR/VC specs, SMC package, but commercial-grade (non-AEC-Q101) | Lacks automotive qualification; acceptable for industrial controls but not safety-critical vehicle subsystems | Select for non-automotive applications requiring identical electrical performance without AEC-Q101 overhead |
Compared with SMAJ22A-E3/57T and SMCJ22A-M3/57T, SM15T22AHM3_A/H uniquely combines 1500 W surge capability, AEC-Q101 qualification, and halogen-free construction-making it the only option among the three qualified for automotive power electronics with full IEC 61000-4-5 Level 4 compliance and zero-halogen regulatory alignment.
Availability
SM15T22AHM3_A/H is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive I/O protection, and telecom base station DC feeds requiring stable component supply, long-lifecycle support, and traceable halogen-free sourcing.
Supply support for SM15T22AHM3_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 designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on high-reliability, high-power, and automotive-qualified components.
The SM15T Series was developed specifically for board-level transient protection in harsh environments-targeting automotive, industrial, and telecom applications where 1500 W surge handling, AEC-Q101 validation, and low-clamp performance are mandatory.
FAQ
What is the clamping voltage of SM15T22AHM3_A/H at its rated peak pulse current?
The SM15T22AHM3_A/H has a maximum clamping voltage (VC) of 30.6 V when subjected to its rated peak pulse current of 49.0 A using the 10/1000 μs waveform. This value is measured under standardized test conditions with the device mounted on 8.0 mm × 8.0 mm copper pads per JEDEC guidelines, and it defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM15T22AHM3_A/H qualified for automotive applications?
Yes, SM15T22AHM3_A/H is AEC-Q101 qualified, as confirmed by the HM3 suffix and documentation in Vishay's 88380 datasheet. It undergoes stress testing including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D, making it suitable for use in automotive power distribution modules, body control units, and ADAS sensor interfaces.
What does the "HM3" suffix indicate in SM15T22AHM3_A/H?
The "HM3" suffix in SM15T22AHM3_A/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (e.g., "M3") and confirms compliance with automotive environmental and reliability standards, including JESD201 Class 2 whisker resistance and MSL Level 1 reflow capability.
How does SM15T22AHM3_A/H differ from SM15T22A-E3/57T?
SM15T22AHM3_A/H differs from SM15T22A-E3/57T in three key ways: it carries the HM3 suffix (halogen-free + AEC-Q101), uses a different tape-and-reel packaging code (A/H vs. 57T), and is supplied in 7″ reels of 850 units. Electrically and thermally, both share identical VWM (18.8 V), VBR (20.9–23.1 V), and VC (30.6 V) specifications.
What is the thermal resistance from junction to lead (RθJL) for SM15T22AHM3_A/H?
The SM15T22AHM3_A/H has a typical junction-to-lead thermal resistance (RθJL) of 15 °C/W, as specified in the Vishay 88380 datasheet. This low value enables effective heat transfer from the silicon die to the PCB copper via the SMC package leads, supporting reliable operation under repetitive surge conditions without thermal runaway.
SM15T22AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SM15T22AHM3_A/H FAQ
1.How can I place an order for SM15T22AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T22AHM3_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 SM15T22AHM3_A/H reliable?
The price and inventory of SM15T22AHM3_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 SM15T22AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SM15T22AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T22AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T22AHM3_A/H?
SM15T22AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T22AHM3_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 SM15T22AHM3_A/H?
For technical support, including SM15T22AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T22AHM3_A/H requirements.
6.How does Aetrix verify that SM15T22AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SM15T22AHM3_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 SM15T22AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SM15T22AHM3_A/H?
All SM15T22AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SM15T22AHM3_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 SM15T22AHM3_A/H part is unused and in its original packaging.
Return procedure for SM15T22AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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