SMM4F15A-TR STMICROELECTRONICS | Alldatasheet

Document overview

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Technical content

Features

■ Typical peak pulse power: – 400 W (10/1000 µs) – 2.4 kW (8/20 µs) ■ Stand off voltage range: from 5 V to 33 V ■ Unidirectional types ■ Low leakage current: – 0.2 µA at 25 °C – 1 µA at 85 °C ■ Operating Tj max: 175 °C ■ JEDEC registered package outline ■ RoHS package ■ Halogen free molding compound Complies with the following standards ■ IEC 61000-4-2 level 4: – 15 kV (air discharge) – 8 kV (contact discharge) ■ MIL STD 883G-Method 3015-7: class3 – 25 kV (human body model)

Description

The SMM4F Transil series has been designed to protect sensitive equipment against electro-static discharges according to IEC 61000-4-2, MIL STD

883 Method 3015, and electrical over stress such

as IEC 61000-4-4 and 5. They are generally for surges below 400 W 10/1000 µs. This planar technology makes it compatible with high-end equipment and SMPS where low leakage current and high junction temperature are required to provide reliability and stability over time. Their low clamping voltages provide a better safety margin to protect sensitive circuits with extended life time expectancy. Packaged in STmite flat, this minimizes PCB space consumption (footprint in accordance with IPC 7531 standard). TM: Transil is a trademark of STMicroelectronics K A STmite flat (DO222-AA)

1 Characteristics

Table 1. Absolute ratings (T amb = 25 °C)

  1. For a surge greater than the maximum val ues, the diode will fail in short-circuit.

Table 2. Thermal resistances Table 3. Electrical characteristics - parameter definitions (T amb = 25 °C)

Figure 1. Definition of I PP pulse Table 4. Electrical characteristics - parameter values (T amb = 25 °C)

  1. To calculate maximum clamping voltage at othe r surge currents, use the following formula VCLmax = RD x IPP + VBRmax
  2. To calculate V BR versus junction temperature, use the following formula: VBR @ Tj = VBR @ 25 °C x (1 + αT x (Tj - 25))

2 Ordering information scheme

Figure 10. Ordering information scheme

3 Package information

  • Case: JEDEC DO-222AA molded plastic over Planar junction
  • Terminals: Solder plated, solderable per MIL-STD-750, Method 2026
  • Polarity: For unidirectional types the band indicates cathode.
  • Flammability: Epoxy is rated UL94V-0
  • RoHS package In order to meet environmental requirements, ST (also) offers these devices in ECOPACK® packages. ECOPACK® packages are Lead-free. The category of second level Interconnect is marked on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.

Table 5. STmite flat dimensions Figure 11. STmite flat footprint Figure 12. Marking information

Table 6. Marking

4 Ordering information

5 Revision history

Table 7. Ordering information

  1. xx indicates stand-off voltage

Table 8. Document revision history 19-Dec-2007 2 Updated IPP and RD parameters in columns 10 and 11 of Table 4.