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Vishay General Semiconductor - Diodes Division SM15T22A-M3/57T
- Part No.:
- SM15T22A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T22A-M3/57T.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,229
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Product details
Overview
SM15T22A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, featuring 22 V breakdown voltage (VBR = 20.9–23.1 V), 18.8 V stand-off voltage (VWM), 30.6 V clamping voltage (VC) at 49.0 A peak pulse current, and 1500 W peak pulse power (10/1000 μs). It protects MOSFETs and sensor signal lines in automotive powertrain control units against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T22A-M3/57T datasheet, SM15T22A-M3/57T pinout, SM15T22A-M3/57T application, or SM15T22A-M3/57T equivalent, key selection criteria include verified clamping performance at 49.0 A IPPM, halogen-free RoHS-compliant construction (M3 suffix), unidirectional polarity with cathode band marking, and AEC-Q101 qualification readiness via HM3 variant.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under transient overvoltage exceeding VWM = 18.8 V, it avalanches at VBR = 20.9–23.1 V (IT = 1.0 mA) and clamps to ≤30.6 V at IPPM = 49.0 A (10/1000 μs), limiting energy dissipation to 1500 W. Its low-inductance SMC package and glass-passivated junction ensure fast response and stable surge handling.
Thermal design relies on RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), with maximum junction temperature TJ = 150 °C. The device fails short-circuit under overstress and meets J-STD-020 MSL Level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18.8 V - Maximum reverse working voltage before avalanche conduction begins; defines normal operating ceiling for protected circuit. |
| VBR @ IT | 20.9–23.1 V @ 1.0 mA - Breakdown voltage range at test current; ensures reliable turn-on margin above VWM. |
| VC @ IPPM | 30.6 V @ 49.0 A - Clamping voltage during 10/1000 μs transient; determines maximum stress imposed on downstream ICs. |
| PPPM | 1500 W - Peak pulse power rating; defines survivability against high-energy surges like lightning-induced line transients. |
| IFSM | 200 A - Peak forward surge current (10 ms half-sine); supports robustness against accidental DC overvoltage or fault currents. |
| TJ max. | 150 °C - Maximum junction temperature; sets thermal derating limit for continuous power dissipation (PD = 6.5 W). |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant (M3 suffix), matte tin-plated leads, polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode of internal PN junction | Connected to protected line; conducts during reverse transient to clamp voltage to VC. |
| Anode (unmarked end) | Cathode of internal PN junction | Connected to ground or low-impedance return path; completes shunt path for surge current. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables protection against high-energy threats including lightning-induced surges on automotive power lines. |
| Clamping voltage ≤30.6 V at 49.0 A | Ensures downstream 3.3 V/5 V logic and analog sensors remain within absolute maximum ratings during transient events. |
| Glass passivated chip junction | Provides stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow assembly without moisture-related popcorn failure risk. |
Applications
| Automotive Powertrain Control | Industrial Motor Drive I/O Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails and CAN transceiver I/O lines in engine control modules exposed to load-dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp transients before they reach MCU power pins or communication interfaces. Use Value: Prevents latch-up or permanent damage to microcontrollers and transceivers during ISO 7637-2 Pulse 1/2a/5a tests. |
Use Scenario: Safeguarding analog input channels of PLC analog I/O modules connected to 4–20 mA current loops driving solenoid valves. IC Role / Device Role / Timing Role: Standoff-rated TVS on signal line to ground, activated only during >18.8 V faults, preserving signal integrity during normal operation. Use Value: Maintains <1 μA leakage at 18.8 V, avoiding measurement error while delivering 30.6 V clamping during 49 A surge events. |
| Consumer Appliance Mainboard ESD | Telecom Power Supply Input Stage |
Use Scenario: Secondary-level protection on AC-DC adapter output rails feeding smart home hub mainboards with USB-C PD controllers. IC Role / Device Role / Timing Role: Fast-response TVS absorbing residual transients that bypass primary MOV-based front-end suppression. Use Value: Low 75 °C/W RθJA enables self-heating control during repetitive 10/1000 μs pulses common in appliance switching noise environments. |
Use Scenario: Input-stage surge suppression on 48 V telecom rectifier outputs feeding base station backplane power distribution networks. IC Role / Device Role / Timing Role: High-power unidirectional TVS mounted directly at connector entry point to divert lightning-induced surges before reaching DC-DC converters. Use Value: 1500 W rating matches GR-1089-CORE Level 3 surge requirements for central office equipment. |
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), same VWM/VBR, SMA package (smaller footprint, higher RθJA = 110 °C/W) | Suitable for space-constrained consumer electronics with lower threat severity; not rated for automotive load-dump. | Select when board area is critical and surge energy is limited to <400 W per event. |
| SMCJ22A-M3/57T | Same SMC package, identical VWM/VBR, but 3000 W peak power rating and higher IPPM (92.6 A) | Required for systems needing higher immunity margins (e.g., ISO 16750-2 Class IV) or longer-duration transients. | Choose when system-level testing requires >1500 W headroom or dual-stage protection architecture is used. |
Compared with SMAJ22A-E3/57T, SM15T22A-M3/57T delivers 275% more surge energy handling in the same SMC footprint; versus SMCJ22A-M3/57T, it trades 50% peak power for tighter VBR tolerance (±5% vs ±6.5%) and lower cost in high-volume automotive production.
Availability
SM15T22A-M3/57T is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive I/O protection, and telecom power supply input stage applications requiring stable component supply, halogen-free compliance, and AEC-Q101 qualification pathway.
Supply support for SM15T22A-M3/57T 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 global manufacturing and quality systems certified to ISO/TS 16949 and AEC-Q200 standards.
The SM15T Series is engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure, emphasizing robust clamping, low leakage, and reflow-compatible packaging for automated SMT assembly.
FAQ
What is the clamping voltage of SM15T22A-M3/57T at its rated peak pulse current?
The SM15T22A-M3/57T has a maximum clamping voltage (VC) of 30.6 V when subjected to its rated peak pulse current (IPPM) of 49.0 A under the standardized 10/1000 μs waveform. This value is measured across the device terminals with specified mounting conditions (0.31" × 0.31" copper pads) and defines the upper voltage limit imposed on protected circuits during surge events. The SM15T22A-M3/57T maintains this clamping performance consistently due to its glass-passivated junction and low-inductance SMC package.
Is SM15T22A-M3/57T qualified for automotive applications?
The SM15T22A-M3/57T itself is commercial-grade and halogen-free (M3 suffix), but Vishay offers AEC-Q101-qualified variants under the HM3 suffix (e.g., SM15T22AHM3_A/H). The SM15T22A-M3/57T shares identical electrical and thermal specifications with its HM3 counterpart and is commonly used in automotive designs where qualification is managed at the system level or where customer-specific validation replaces full AEC-Q101 certification. The SM15T22A-M3/57T meets MSL Level 1 and JESD201 Class 2 whisker resistance requirements.
How does the M3 suffix affect the material composition of SM15T22A-M3/57T?
The M3 suffix on SM15T22A-M3/57T indicates halogen-free, RoHS-compliant construction per JEDEC standards, with brominated flame retardants replaced by alternative chemistries in the molding compound. This satisfies strict environmental compliance requirements for consumer, industrial, and automotive markets without compromising UL 94 V-0 flammability rating. The SM15T22A-M3/57T retains the same electrical performance, thermal resistance, and mechanical dimensions as E3-suffix versions-only the material formulation differs.
What is the reverse leakage current of SM15T22A-M3/57T at its maximum working voltage?
At its maximum reverse stand-off voltage (VWM) of 18.8 V and ambient temperature of 25 °C, the SM15T22A-M3/57T exhibits a maximum reverse leakage current (ID) of 1.0 μA. This ultra-low leakage ensures minimal power loss and no measurable impact on signal integrity in high-impedance sensing circuits or battery-powered systems. The SM15T22A-M3/57T maintains this specification across its full operating temperature range (-65 °C to +150 °C), verified per Vishay's electrical characteristics table.
Can SM15T22A-M3/57T be used in bidirectional configurations?
No-SM15T22A-M3/57T is a unidirectional TVS diode, identified by the "A" suffix and cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., SM15T22CA-M3/57T), which uses a symmetrical dual-junction structure. Using SM15T22A-M3/57T in reverse-biased configurations will result in forward conduction and potential damage. The SM15T22A-M3/57T must be oriented with the cathode band toward the protected line and anode toward ground to function correctly.
SM15T22A-M3/57T 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T22A-M3/57T FAQ
1.How can I place an order for SM15T22A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T22A-M3/57T 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 SM15T22A-M3/57T reliable?
The price and inventory of SM15T22A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T22A-M3/57T is usually 5 days.
3.What payment methods are accepted for SM15T22A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T22A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T22A-M3/57T?
SM15T22A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T22A-M3/57T 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 SM15T22A-M3/57T?
For technical support, including SM15T22A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T22A-M3/57T requirements.
6.How does Aetrix verify that SM15T22A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T22A-M3/57T 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 SM15T22A-M3/57T meets industry standards.
7.What is the process for return or replacement of SM15T22A-M3/57T?
All SM15T22A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T22A-M3/57T, 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 SM15T22A-M3/57T part is unused and in its original packaging.
Return procedure for SM15T22A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T22A-M3/57T Tags
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