My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SM15T22A-E3/57T
- Part No.:
- SM15T22A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T22A-E3/57T.pdf
- Description:
- TVS DIODE 18.8VWM 30.6VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,122
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM15T22A-E3/57T 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 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-E3/57T datasheet, SM15T22A-E3/57T pinout, SM15T22A-E3/57T application, or SM15T22A-E3/57T equivalent, key selection criteria include unidirectional polarity, 20.9–23.1 V breakdown voltage range, RoHS-compliant commercial-grade construction, and AEC-Q101 qualification availability via HE3 suffix variants.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its 20.9–23.1 V breakdown threshold, limiting transient energy to safe levels for downstream components. Its low-inductance SMC package and glass-passivated junction enable fast response (<1 ns) and stable performance under repeated surge stress.
The device sustains 200 A non-repetitive forward surge current (10 ms half-sine) and exhibits thermal resistance of 75 °C/W (junction-to-ambient) on standard 8.0 mm × 8.0 mm copper pads. Failure mode under overstress is short-circuit, ensuring system-level fault containment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 W - withstands high-energy lightning surges without degradation |
| Stand-off Voltage (VWM) | 18.8 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| Breakdown Voltage (VBR) | 20.9–23.1 V at 1.0 mA - precise avalanche initiation threshold for reliable clamping onset |
| Clamping Voltage (VC) | 30.6 V at 49.0 A - limits transient voltage seen by protected circuitry during surge events |
| Package | SMC (DO-214AB) - surface-mount footprint with 7.75 mm × 6.22 mm body and cathode band marking |
| Operating Temperature | −65 °C to +150 °C - supports under-hood automotive and industrial ambient conditions |
| RoHS Compliance | E3 suffix - lead-free, halogen-free, and compliant per JEDEC J-STD-020 MSL Level 1 |
Pinout & Package
SM15T22A-E3/57T uses the SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, 0.305″ × 0.246″ (7.75 mm × 6.22 mm) body dimensions, and cathode band marking on the anode side. Mounting requires 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal for rated thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage |
| Anode | Reference node | Typically tied to system ground or low-impedance return path for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse rating | Enables robust protection against IEC 61000-4-5 Level 4 (4 kV) surges without derating |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling |
| Low inductance SMC package | Minimizes voltage overshoot during <1 ns transient rise times (e.g., ESD, relay bounce) |
| AEC-Q101 qualified option | HE3 suffix variant available for automotive powertrain and body electronics applications |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow compatibility up to 260 °C peak temperature |
Applications
| Automotive Power Distribution | Industrial Motor Drive I/O Protection |
|---|---|
|
Use Scenario: Protecting 24 V DC power rails feeding ECUs, lighting modules, and window lift controllers from load-dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp positive-going surges above 18.8 V. Use Value: Prevents latch-up or gate oxide damage in downstream MOSFET drivers and microcontrollers during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding analog input channels and encoder feedback lines in servo drives exposed to inductive kickback from 3-phase motor windings. IC Role / Device Role / Timing Role: Clamping diode installed across signal pair or from signal to ground to suppress 100–500 V switching spikes. Use Value: Maintains ±0.1 % measurement accuracy in 16-bit ADCs by limiting transient-induced offset drift and preventing comparator false triggering. |
| Telecom Base Station DC Feeds | Consumer Appliance Control Boards |
|
Use Scenario: Shielding -48 V DC backup power inputs in 5G remote radio units from lightning-induced surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Primary front-end TVS on power entry PCB, coordinated with upstream GDT and downstream π-filter. Use Value: Limits clamped voltage to ≤30.6 V, keeping downstream DC/DC converter input stage within absolute maximum ratings during 10/1000 μs threats. |
Use Scenario: Guarding microcontroller GPIOs and relay driver outputs in washing machine control boards against EMI from brushless motor commutation. IC Role / Device Role / Timing Role: Localized TVS mounted directly at connector or relay coil terminals to minimize loop inductance. Use Value: Eliminates firmware resets caused by >2 kV transients coupling into 3.3 V logic rails, verified per IEC 61000-4-4 Level 3. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Lower peak pulse power (400 W), same SMC package, 22 V nominal VWM, higher VC (35.5 V @ 11.3 A) | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy I/O line protection | Select SMAJ22A only where surge threat level is ≤1 kV and board space constraints prevent larger packages. |
| SMCJ22A | Same 1500 W rating and SMC package, but higher VBR (23.1–25.5 V), tighter VC (34.0 V @ 44.1 A), and higher thermal resistance (85 °C/W) | Better clamping margin for 24 V systems with wider supply tolerance; slightly reduced thermal headroom | Choose SMCJ22A when protecting 24 V circuits with ±10 % regulation and need tighter VC/VBR ratio. |
Compared with SMAJ22A and SMCJ22A, SM15T22A-E3/57T delivers optimal balance of clamping voltage (30.6 V), surge current handling (49.0 A), and thermal performance (75 °C/W) for cost-sensitive 24 V industrial and automotive subsystems requiring full 1500 W capability in SMC form factor.
Availability
SM15T22A-E3/57T 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 and RoHS-compliant manufacturing.
Supply support for SM15T22A-E3/57T 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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SM15T Series was engineered specifically for high-energy transient suppression in harsh environments-targeting 24 V and 48 V systems in automotive, industrial automation, and telecom infrastructure where 1500 W surge immunity is mandatory.
FAQ
What is the breakdown voltage range of the SM15T22A-E3/57T?
The SM15T22A-E3/57T has a guaranteed breakdown voltage (VBR) range of 20.9 V to 23.1 V at 1.0 mA test current, measured per JEDEC standards. This tight tolerance ensures consistent clamping behavior across production lots and enables precise coordination with downstream overvoltage protection thresholds in the SM15T22A-E3/57T design.
Is the SM15T22A-E3/57T suitable for automotive applications?
The SM15T22A-E3/57T is RoHS-compliant and commercial-grade; however, Vishay offers AEC-Q101 qualified versions under HE3/HM3 suffixes (e.g., SM15T22AHE3_A). For automotive use, specify the HE3 variant-SM15T22A-E3/57T itself is not AEC-Q101 certified but shares identical electrical and thermal characteristics with the qualified version.
What does the "E3/57T" suffix indicate in SM15T22A-E3/57T?
In SM15T22A-E3/57T, "E3" denotes RoHS-compliant, commercial-grade construction with matte tin plating and JESD201 Class 2 whisker resistance; "57T" specifies packaging in 7-inch diameter plastic tape and reel, with 850 units per reel. This format ensures compatibility with high-speed pick-and-place equipment and meets IPC-A-610 Class 2 solderability requirements.
How does the clamping voltage of SM15T22A-E3/57T compare to its stand-off voltage?
The SM15T22A-E3/57T has a stand-off voltage (VWM) of 18.8 V and a maximum clamping voltage (VC) of 30.6 V at 49.0 A (10/1000 μs). This 11.8 V differential provides 63 % overvoltage margin above VWM, ensuring reliable operation during normal 24 V system transients while still suppressing destructive surges-critical for protecting 30 V-rated MOSFETs in the same SM15T22A-E3/57T application.
Can SM15T22A-E3/57T be used in bidirectional configurations?
No-SM15T22A-E3/57T is unidirectional, indicated by the "A" suffix and cathode band marking. For bidirectional protection, Vishay specifies the "CA" suffix (e.g., SM15T22CA). Using SM15T22A-E3/57T in reverse-biased configurations risks permanent failure due to lack of symmetrical avalanche structure; always verify polarity alignment in the SM15T22A-E3/57T layout.
SM15T22A-E3/57T 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-E3/57T FAQ
1.How can I place an order for SM15T22A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T22A-E3/57T 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-E3/57T reliable?
The price and inventory of SM15T22A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T22A-E3/57T is usually 5 days.
3.What payment methods are accepted for SM15T22A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T22A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T22A-E3/57T?
SM15T22A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T22A-E3/57T 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-E3/57T?
For technical support, including SM15T22A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T22A-E3/57T requirements.
6.How does Aetrix verify that SM15T22A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SM15T22A-E3/57T 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-E3/57T meets industry standards.
7.What is the process for return or replacement of SM15T22A-E3/57T?
All SM15T22A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SM15T22A-E3/57T, 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-E3/57T part is unused and in its original packaging.
Return procedure for SM15T22A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T22A-E3/57T 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 …
