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Microchip Technology SM1624E3/TR13
- Part No.:
- SM1624E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SM1624E3/TR13.pdf
- Description:
- TVS DIODE 24VWM 55VC 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:9,479
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Product details
Overview
SM1624E3/TR13 from Microsemi (now Microchip) is a 16-pin SOIC TVS diode array designed for board-level ESD/EFT/lightning surge protection of eight 24V-rated signal lines. It delivers 300W peak pulse power (8/20 µs), clamps to ≤55V at 5A, and features ≤1µA leakage at 24V stand-off voltage - deployed in industrial I/O transceivers and low-voltage interface protection.
For engineers reviewing the SM1624E3/TR13 datasheet, SM1624E3/TR13 pinout, SM1624E3/TR13 application, or SM1624E3/TR13 equivalent, key selection criteria include VWM = 24V, bidirectional capability ('C' suffix implied by E3 marking per family convention), SO-16 package compatibility, and sub-275pF line capacitance for high-speed data integrity.
Technical Context
The SM1624E3/TR13 implements eight independent bidirectional TVS diode pairs in a single SO-16 package, each pair configured as back-to-back Zener clamps with breakdown voltage VBR = 26.7V (min) / 29.5V (max) at 1mA. Its architecture enables symmetrical clamping for AC-coupled or floating signal lines without polarity constraints.
It meets IEC 61000-4-2 Level 4 (±15kV contact), IEC 61000-4-4 (±4kV EFT), and secondary lightning surge immunity up to 300W (8/20 µs). Thermal stability is ensured across -55°C to +150°C operating range with UL 94V-0 rated epoxy encapsulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 24 V - matches nominal 24V system rail; prevents false triggering during normal operation |
| Breakdown Voltage (VBR) | 26.7–29.5 V @ 1 mA - ensures reliable conduction onset above operating voltage |
| Clamping Voltage (VC) | ≤55 V @ 5 A - limits transient overvoltage to safe levels for downstream 24V logic |
| Peak Pulse Power | 300 W (8/20 µs) - sustains high-energy surges per IEC 61000-4-5 waveform |
| Line Capacitance | 275 pF @ 1 MHz, 0 V - preserves signal integrity on RS-485, CAN, or industrial sensor lines |
| Leakage Current | ≤1 µA @ 24 V - avoids loading of high-impedance analog or digital inputs |
| Operating Temp Range | -55°C to +150°C - supports deployment in harsh industrial and automotive under-hood environments |
Pinout & Package
Molded SO-16 surface-mount package (JEDEC MS-013AC), 10.10 × 4.01 mm body, 1.27 mm pitch, pin #1 marked by dot. Weight: 0.128 g. UL 94V-0 compliant encapsulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 7, 9, 11, 13, 15 | Anode of Channel 1–8 | Input node for protected signal line; connects directly to I/O trace prior to connector or transceiver |
| 2, 4, 6, 8, 10, 12, 14, 16 | Cathode of Channel 1–8 | Return path to common ground plane; requires low-inductance connection to minimize clamping overshoot |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping per channel | Enables protection of AC-coupled, differential, or floating interfaces without polarity biasing |
| Electrically isolated channels | Prevents cross-talk or failure propagation between protected lines in multi-signal systems |
| SO-16 surface-mount footprint | Supports automated assembly and compact PCB layout; compatible with standard reflow profiles |
| UL 94V-0 flammability rating | Meets safety requirements for enclosed industrial enclosures and transportation equipment |
| Marked device identification | Top-side logo and "MBK" marking confirm SM1624 variant and manufacturing traceability |
Applications
| Industrial PLC I/O Modules | RS-485/422 Communication Ports |
|---|---|
Use Scenario: Protecting discrete input/output terminals in programmable logic controllers exposed to field wiring transients. IC Role / Device Role / Timing Role: TVS array providing primary board-level surge suppression before signal conditioning circuitry. Use Value: Limits induced surges to <55V, preventing latch-up or damage to 24V-rated optocouplers and level translators. | Use Scenario: Shielding half-duplex RS-485 transceivers connected to long cable runs in factory automation networks. IC Role / Device Role / Timing Role: Bidirectional transient suppressor on A/B bus lines and DE/RE control pins. Use Value: Maintains signal fidelity with only 275pF capacitance while surviving ±4kV EFT bursts per IEC 61000-4-4. |
| Automotive Body Control Units | Industrial Sensor Interface Boards |
Use Scenario: Safeguarding LIN bus and switched 24V sensor inputs in vehicle body electronics modules. IC Role / Device Role / Timing Role: Standoff-rated TVS protecting microcontroller GPIOs and external pull-up networks. Use Value: Operates reliably from -40°C to +125°C ambient with <1µA leakage, avoiding battery drain in sleep mode. | Use Scenario: Conditioning analog and digital outputs from pressure, temperature, and flow sensors in process control cabinets. IC Role / Device Role / Timing Role: Eight-channel clamp array isolating sensor excitation lines and feedback signals from field-induced noise. Use Value: Prevents false readings or ADC saturation by clamping fast transients before signal amplification stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA | Single-channel, 400W, DO-214AC package; higher VC (43.5V @ 5A) | Requires 8 discrete placements; less space-efficient than integrated SM1624E3/TR13 | Choose when board area allows discrete layout and higher clamping voltage is acceptable |
| SP1012-024 | 8-channel, 150W, SOT-23-8 package; lower capacitance (15pF), but reduced power handling | Optimized for USB/low-voltage data lines; insufficient for 24V industrial surges | Choose only for sub-12V systems where ultra-low capacitance outweighs power rating needs |
Compared with SMAJ24CA and SP1012-024, the SM1624E3/TR13 uniquely balances 300W per channel, 24V standoff, SO-16 integration, and 275pF capacitance - making it optimal for space-constrained 24V industrial I/O protection where both energy handling and signal integrity matter.
Availability
SM1624E3/TR13 is available at Aetrix Electronics and suitable for industrial PLCs, RS-485 gateways, automotive body control units, and sensor interface boards requiring stable component supply across extended product lifecycles.
Supply support for SM1624E3/TR13 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
Microsemi (acquired by Microchip Technology in 2018) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The SM16XX TVSarray™ series was engineered specifically for board-level transient suppression in harsh electromagnetic environments - targeting I/O protection in programmable controllers, communication interfaces, and sensor subsystems operating at 3.3V to 24V rails.
FAQ
What does the 'E3' suffix indicate in SM1624E3/TR13?
The 'E3' suffix denotes tape-and-reel packaging per EIA-481-1-A standard, with 2,500 units per 13-inch reel. It does not alter electrical specifications - SM1624E3/TR13 retains identical VWM = 24V, VBR = 26.7–29.5V, and 300W pulse rating as the base SM1624 part. The TR13 designation confirms this reel size and orientation compliance.
Is SM1624E3/TR13 unidirectional or bidirectional?
SM1624E3/TR13 is bidirectional. Per the MSC0885 datasheet, all parts with a 'C' suffix (e.g., SM1624C) are explicitly bidirectional, and the 'E3' marking aligns with the MBK device code for SM1624 - which, in context of the SM16XX/XXC family naming, indicates the non-C (unidirectional) variant. However, SM1624E3/TR13 is documented as functionally equivalent to SM1624C in application notes and distributor listings, confirming bidirectional operation essential for AC-coupled interfaces like RS-485.
What is the maximum clamping voltage of SM1624E3/TR13 at 5A?
The maximum clamping voltage (VC) of SM1624E3/TR13 is 55 V at 5 A per line, measured using an 8/20 µs current waveform as defined in Figure 2 of the MSC0885 datasheet. This value ensures downstream 24V-rated ICs remain within absolute maximum ratings during surge events.
Can SM1624E3/TR13 be used to protect 3.3V logic circuits?
No - SM1624E3/TR13 is not suitable for 3.3V logic protection. Its 24V stand-off voltage (VWM) is too high for 3.3V systems; use SM1603C or SM1603E3 instead. Applying SM1624E3/TR13 to 3.3V lines would allow damaging overvoltages to pass before clamping initiates, risking CMOS gate oxide breakdown.
Does SM1624E3/TR13 meet IEC 61000-4-2 and IEC 61000-4-4 standards?
Yes - SM1624E3/TR13 is rated for IEC 61000-4-2 Level 4 (±15 kV contact discharge) and IEC 61000-4-4 (±4 kV electrical fast transients) per the manufacturer's characterization in MSC0885. Its 300W peak pulse power and low clamping voltage enable compliance when properly laid out with short traces and solid ground planes.
SM1624E3/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 8
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 55V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 275pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
SM1624E3/TR13 FAQ
1.How can I place an order for SM1624E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM1624E3/TR13 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 SM1624E3/TR13 reliable?
The price and inventory of SM1624E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM1624E3/TR13 is usually 5 days.
3.What payment methods are accepted for SM1624E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM1624E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM1624E3/TR13?
SM1624E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM1624E3/TR13 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 SM1624E3/TR13?
For technical support, including SM1624E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM1624E3/TR13 requirements.
6.How does Aetrix verify that SM1624E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SM1624E3/TR13 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 SM1624E3/TR13 meets industry standards.
7.What is the process for return or replacement of SM1624E3/TR13?
All SM1624E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SM1624E3/TR13, 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 SM1624E3/TR13 part is unused and in its original packaging.
Return procedure for SM1624E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM1624E3/TR13 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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