My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM15T22A-E3/9AT
- Part No.:
- SM15T22A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T22A-E3/9AT.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,043
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM15T22A-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 30.6 V clamping voltage at 49.0 A peak pulse current, 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 SM15T22A-E3/9AT datasheet, SM15T22A-E3/9AT pinout, SM15T22A-E3/9AT application, or SM15T22A-E3/9AT equivalent, key selection criteria include verified clamping performance at IPPM = 49.0 A, unidirectional polarity with cathode band marking, RoHS-compliant commercial-grade construction, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SM15T22A-E3/9AT operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 20.9–23.1 V breakdown range at 1.0 mA test current. Its low-inductance SMC package and glass-passivated junction enable fast response to transients up to 1500 W under standardized 10/1000 μs waveform conditions.
Thermal design relies on RθJA = 75 °C/W and RθJL = 15 °C/W, with maximum junction temperature of +150 °C. Failure mode under overstress is short-circuit, consistent with IEC 61000-4-5 surge protection requirements for industrial and automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18.8 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 μA; defines safe DC bias margin. |
| VBR (min/max) | 20.9 V / 23.1 V - Breakdown occurs within this range at 1.0 mA; ensures predictable turn-on threshold. |
| VC @ IPPM | 30.6 V at 49.0 A - Clamped voltage during 10/1000 μs surge; determines protected circuit's maximum transient exposure. |
| PPPM | 1500 W - Peak pulse power handling capability; validates suitability for lightning-level threats per IEC 61000-4-5. |
| Package | SMC (DO-214AB) - Surface-mount outline with 0.320" length, 0.246" width, and 0.126" height; supports automated placement and JEDEC-compliant reflow. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and high-ambient industrial environments. |
Pinout & Package
SM15T22A-E3/9AT uses the standard SMC (DO-214AB) package: molded plastic body with matte tin-plated leads, cathode indicated by a band on the case. Terminals are designed for soldering per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path (unidirectional conduction) | Connected to system ground or low-side return; carries surge current during clamping event. |
| Cathode | Reverse-biased terminal (marked with band) | Connected to protected line (e.g., 24 V rail or sensor input); initiates avalanche breakdown above VWM. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Validated clamping capacity for Level 4 IEC 61000-4-5 surges without degradation. |
| Glass passivated chip junction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter drift. |
| Low inductance SMC package | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time). |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without moisture sensitivity concerns. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in body control modules against load-dump and inductive switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery feed and downstream DC/DC converter input. Use Value: Limits transient voltage to ≤30.6 V during 49 A surges, preventing damage to 36 V-rated regulators and microcontrollers. | Use Scenario: Shielding analog inputs of pressure or temperature sensors connected to long harnesses in factory automation. IC Role / Device Role / Timing Role: Standoff protector on signal line referenced to local ground, absorbing ESD and cable discharge events. Use Value: Maintains signal integrity with <1.0 μA leakage at 18.8 V, while clamping 8/20 μs surges to ≤39.3 V. |
| Telecom DC Power Input | Consumer Appliance Motor Drive |
Use Scenario: Safeguarding PoE-powered equipment front-end against induced surges on 48 V DC input lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on input stage, coordinated with upstream fuse and common-mode choke. Use Value: Withstands repeated 1500 W pulses without parameter shift, supporting >100,000 surge cycles per MIL-STD-883H Method 3015.7. | Use Scenario: Suppressing back-EMF from brushed DC motors in washing machine control boards. IC Role / Device Role / Timing Role: Freewheeling path clamp across motor terminals, diverting inductive energy during PWM turn-off. Use Value: Handles 200 A non-repetitive forward surge (IFSM), enabling robust protection without series resistor or snubber network. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | 600 W PPPM rating, same VWM/VBR range, SMA package (smaller thermal mass) | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 compliance | Select when board space is constrained and surge threat level is ≤600 W. |
| SMCJ22A | Same 1500 W PPPM, identical SMC package, but higher VC = 32.4 V at 49.0 A | Marginally higher clamping voltage reduces protected IC headroom by 1.8 V | Prefer when tighter VBR tolerance (±5 % vs. ±10 %) or AEC-Q101 qualification is required. |
Compared with SMAJ22A and SMCJ22A, the SM15T22A-E3/9AT delivers identical 1500 W surge capability and SMC footprint but achieves the lowest clamping voltage (30.6 V) in its class-critical for protecting 3.3 V or 5 V logic interfaces downstream of 24 V systems.
Availability
SM15T22A-E3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, telecom DC power input, and consumer appliance motor drive applications requiring stable component supply and full traceability.
Supply support for SM15T22A-E3/9AT 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 reliability, power handling, and AEC-Q101 qualification for harsh environments.
The SM15T Series is engineered specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure-delivering 1500 W surge capability in compact SMC packages with validated short-circuit failure mode.
FAQ
What is the clamping voltage of SM15T22A-E3/9AT at its rated peak pulse current?
The SM15T22A-E3/9AT 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 standard 10/1000 μs waveform. This value is measured with the device mounted on 8.0 mm × 8.0 mm copper pads per JEDEC guidelines and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SM15T22A-E3/9AT RoHS-compliant and halogen-free?
SM15T22A-E3/9AT is RoHS-compliant (per Directive 2011/65/EU) and carries the "E3" suffix indicating commercial-grade, lead-free, and RoHS-conforming construction. It is not halogen-free; halogen-free versions use the "M3" suffix (e.g., SM15T22A-M3/9AT), which also meets JESD201 Class 2 whisker resistance requirements.
Does SM15T22A-E3/9AT meet AEC-Q101 qualification?
No, SM15T22A-E3/9AT is not AEC-Q101 qualified. The AEC-Q101 version uses the "HE3" suffix (e.g., SM15T22AHE3_A/I). The "E3" suffix denotes commercial-grade qualification only. For automotive applications requiring AEC-Q101 validation, SM15T22AHE3_A/I must be selected instead.
What is the thermal resistance from junction to ambient for SM15T22A-E3/9AT?
The typical thermal resistance from junction to ambient (RθJA) for SM15T22A-E3/9AT is 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads. This value assumes still air convection and is used to calculate steady-state junction temperature rise under continuous power dissipation (PD = 6.5 W).
How is polarity identified on SM15T22A-E3/9AT?
Polarity on SM15T22A-E3/9AT is indicated by a cathode band printed on the device body. As a unidirectional TVS diode, the banded end is the cathode and must be connected toward the positive side of the protected line (e.g., 24 V rail), while the anode connects to ground or return path. No marking appears on bidirectional variants.
SM15T22A-E3/9AT 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-E3/9AT FAQ
1.How can I place an order for SM15T22A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T22A-E3/9AT 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-E3/9AT reliable?
The price and inventory of SM15T22A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T22A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T22A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T22A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T22A-E3/9AT?
SM15T22A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T22A-E3/9AT 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-E3/9AT?
For technical support, including SM15T22A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T22A-E3/9AT requirements.
6.How does Aetrix verify that SM15T22A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T22A-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T22A-E3/9AT?
All SM15T22A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T22A-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for SM15T22A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T22A-E3/9AT Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
