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Vishay General Semiconductor - Diodes Division SM6T24A-E3/5B
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- Part No.:
- SM6T24A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SM6T24A-E3/5B.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,268
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Product details
Overview
SM6T24A-E3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 24 V standoff voltage (VWM = 20.5 V), 22.8–25.2 V breakdown voltage at 1 mA, 33.2 V max clamping voltage at 18 A (10/1000 μs), 600 W peak pulse power, and 150 °C max junction temperature. It protects MOSFETs and ICs in automotive power supplies.
For engineers reviewing the SM6T24A-E3/5B datasheet, SM6T24A-E3/5B pinout, SM6T24A-E3/5B application, or SM6T24A-E3/5B equivalent, key selection criteria include unidirectional polarity, SMB package thermal resistance (RθJA = 100 °C/W), clamping performance under 10/1000 μs surge, AEC-Q101 qualification status, and RoHS-compliant matte tin plating.
Technical Context
The SM6T24A-E3/5B operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response to ESD and lightning-induced transients. Its low inductance and MSL Level 1 rating support high-reliability automated SMT assembly on consumer and automotive PCBs.
Clamping behavior follows standardized 10/1000 μs waveform testing per Fig. 1 and Fig. 3 of Vishay Doc. 88385. Thermal derating above 25 °C is defined in Fig. 2, and maximum reverse leakage is specified at 1.0 μA under 20.5 V standoff.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20.5 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 22.8 V / 25.2 V at IT = 1 mA - Confirmed avalanche breakdown range for reliable triggering |
| VC @ IPPM | 33.2 V at 18.0 A (10/1000 μs) - Clamping voltage limiting downstream component stress during surge |
| PPPM | 600 W - Peak transient energy absorption capability under standard 10/1000 μs waveform |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on 0.2" × 0.2" copper pads, defining heatsinking requirements |
| TJ max | +150 °C - Maximum allowable junction temperature for sustained operation and reliability |
| ID @ VWM | ≤1.0 μA - Reverse leakage current ensuring minimal standby power loss and signal integrity |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return in unidirectional clamp configuration |
| Cathode | Reverse-biased terminal / protected line connection | Connected to the line being protected (e.g., 24 V rail); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 3 surges without external series impedance |
| Glass passivated chip junction | Ensures stable breakdown voltage and long-term reliability under thermal cycling and humidity |
| MSL Level 1, 260 °C reflow compatible | Supports single-pass lead-free reflow without popcorn effect or delamination |
| RoHS-compliant, halogen-free option available | Meets environmental compliance for automotive and industrial end-equipment certification |
| Low inductance SMB package | Minimizes voltage overshoot during fast transients (<1 ns rise time), critical for MOSFET gate protection |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: Suppressing load-dump transients on 24 V battery-fed ECUs in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V supply and ground, triggered within nanoseconds upon overvoltage event. Use Value: Limits clamped voltage to ≤33.2 V, protecting downstream DC-DC controllers rated for 36 V absolute max. | Use Scenario: Guarding analog output lines (e.g., 4–20 mA current loop) in factory-floor pressure sensors exposed to relay switching noise. IC Role / Device Role / Timing Role: Standby-mode shunt protector on signal line, conducting only during >20.5 V excursions. Use Value: Maintains <1.0 μA leakage at 20.5 V, preserving loop accuracy while clamping 1 kV/500 A transients per IEC 61000-4-4. |
| Consumer PSU Input Stage Clamp | MOSFET Gate Transient Suppression |
Use Scenario: Secondary-side overvoltage protection in 24 V wall-adapters powering smart home hubs. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor output, absorbing flyback spikes from transformer leakage inductance. Use Value: 600 W rating handles repetitive 100 ns–1 μs spikes without degradation; RθJA = 100 °C/W enables natural convection cooling. | Use Scenario: Preventing gate oxide rupture in N-channel power MOSFETs driven by microcontrollers in motor control H-bridges. IC Role / Device Role / Timing Role: Low-inductance TVS tied between gate and source, clamping Miller-induced voltage spikes during switching transitions. Use Value: Fast avalanche response and SMB package geometry minimize parasitic inductance, keeping clamped spike <33.2 V even at di/dt >10 A/ns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A | Same SMB package, 24 V VWM, but lower PPPM = 400 W; higher VC = 38.9 V at 10.3 A | Less suitable for IEC 61000-4-5 Level 4 or high-current load dump; better for cost-sensitive consumer designs | Select SMAJ24A only if surge current remains below 10.3 A and thermal margin allows higher clamping voltage |
| SMCJ24A | Larger SMC (DO-214AB) package; same VWM/VBR/VC specs but PPPM = 1500 W and RθJA = 30 °C/W | Required where 600 W is insufficient or board layout permits larger footprint for improved thermal performance | Choose SMCJ24A when system-level surge testing exceeds 600 W or ambient temperature exceeds 85 °C |
Compared with SMAJ24A and SMCJ24A, the SM6T24A-E3/5B delivers optimal balance of compact SMB footprint, 600 W surge handling, and 33.2 V clamping-making it ideal for space-constrained 24 V automotive and industrial modules where thermal management is moderate and surge severity is defined by ISO 7637-2 Pulse 5a.
Availability
SM6T24A-E3/5B is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface circuits, consumer power supply input stages, and MOSFET gate transient suppression requiring stable component supply and traceable sourcing.
Supply support for SM6T24A-E3/5B 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SM6T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where AEC-Q101 qualification, low clamping voltage, and consistent surge performance are mandatory.
FAQ
What is the polarity configuration of the SM6T24A-E3/5B?
The SM6T24A-E3/5B is a unidirectional transient voltage suppressor diode. Its cathode is marked by a band on the SMB package body, and it conducts only during reverse-bias overvoltage events. This configuration ensures precise clamping on positive-going transients in 24 V supply rails, unlike bidirectional variants which suppress both polarities.
Does the SM6T24A-E3/5B meet AEC-Q101 qualification?
No, the SM6T24A-E3/5B is RoHS-compliant commercial-grade; AEC-Q101 qualification applies only to variants with HE3 or HM3 suffixes (e.g., SM6T24AHE3_B). The SM6T24A-E3/5B shares identical electrical and thermal specs but lacks automotive stress-test validation required for under-hood deployment.
What is the maximum clamping voltage of the SM6T24A-E3/5B under standard test conditions?
The SM6T24A-E3/5B has a maximum clamping voltage (VC) of 33.2 V when subjected to an 18.0 A peak pulse current with a 10/1000 μs waveform, as specified in Vishay Doc. 88385. This value defines the upper voltage limit imposed on protected circuitry during surge events.
Can the SM6T24A-E3/5B be used in bidirectional protection applications?
No-the SM6T24A-E3/5B is strictly unidirectional. For bidirectional protection, Vishay specifies CA-suffixed variants such as SM6T24CA. Using the SM6T24A-E3/5B in bidirectional configurations risks failure during negative transients due to lack of symmetrical breakdown characteristics.
What is the thermal resistance of the SM6T24A-E3/5B in standard mounting conditions?
The SM6T24A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as defined in Vishay Doc. 88385. This value assumes no additional heatsinking and governs safe power dissipation limits at elevated ambient temperatures.
SM6T24A-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- SM6T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 18A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SM6T24A-E3/5B FAQ
1.How can I place an order for SM6T24A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SM6T24A-E3/5B 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 SM6T24A-E3/5B reliable?
The price and inventory of SM6T24A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM6T24A-E3/5B is usually 5 days.
3.What payment methods are accepted for SM6T24A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM6T24A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM6T24A-E3/5B?
SM6T24A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM6T24A-E3/5B 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 SM6T24A-E3/5B?
For technical support, including SM6T24A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM6T24A-E3/5B requirements.
6.How does Aetrix verify that SM6T24A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SM6T24A-E3/5B 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 SM6T24A-E3/5B meets industry standards.
7.What is the process for return or replacement of SM6T24A-E3/5B?
All SM6T24A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SM6T24A-E3/5B, 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 SM6T24A-E3/5B part is unused and in its original packaging.
Return procedure for SM6T24A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM6T24A-E3/5B Tags
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