1N6267A Series Watt Zener Transient Voltage Suppressors. Unidirectional*

Size: px

Start display at page:

Download "1N6267A Series Watt Zener Transient Voltage Suppressors. Unidirectional*"

Branden Rice
5 years ago
Views:

500 Watt Zener Transient Voltage Suppressors Unidirectional* These devices are designed to protect voltage sensitive components from high voltage, high energy transients.

1 500 Watt Zener Transient Voltage Suppressors Unidirectional* These devices are designed to protect voltage sensitive components from high voltage, high energy transients. They have excellent clamping capability, high surge capability, low zener impedance and fast response time. These devices are the Littelfuse exclusive, cost-effective, highly reliable axial leaded package and are ideally-suited for use in communication systems, numerical controls, process controls, medical equipment, business machines, power supplies and many other industrial/consumer applications, to protect CMOS, MOS and Bipolar integrated circuits. Cathode Littelfuse.com Anode AXIAL LEAD CASE 4A PLASTIC Features Working Peak Reverse Voltage Range 5.8 V to 24 V Peak Power 500 ms ESD Rating of Class 3 (>6 kv) per Human Body Model Maximum Clamp Peak Pulse Current Low Leakage < 5 A Above 0 V UL 497B for Isolated Loop Circuit Protection Response Time is Typically < ns Pb Free Packages are Available Mechanical Characteristics CASE: Void-free, transfer-molded, thermosetting plastic FINISH: All external surfaces are corrosion resistant and leads are readily solderable MAXIMUM LEAD TEMPERATURE FOR SOLDERING PURPOSES: 230 C, /6 in from the case for 0 seconds POLARITY: Cathode indicated by polarity band MOUNTING POSITION: Any A = Assembly Location.5KExxxA = ON Device Code N6xxxA = JEDEC Device Code YY = Year WW = Work Week = (See Table on Page 3) = Pb Free Package (Note: Microdot may be in either location) ORDERING INFORMATION Device Package Shipping.5KExxxA Axial Lead 500 Units/Box.5KExxxAG.5KExxxARL4 Axial Lead 500/Tape & Reel.5KExxxARL4G MARKING DIAGRAM N6xxxA Axial Lead 500 Units/Box N6xxxAG A.5KE xxxa N6 xxxa YYWW N6xxxARL4 Axial Lead 500/Tape & Reel N6xxxARL4G Axial Lead (Pb Free) Axial Lead (Pb Free) Axial Lead (Pb Free) Axial Lead (Pb Free) 500 Units/Box 500/Tape & Reel 500 Units/Box 500/Tape & Reel Preferred devices are recommended choices for future use and best overall value. Publication Order Number:

2 MAXIMUM RATINGS Rating Symbol Value Unit Peak Power Dissipation (Note T L 25 C P PK 500 W Steady State Power T L 75 C, Lead Length = 3/8 in Derated above T L = 75 C P D W mw/ C Thermal Resistance, Junction to Lead R JL 20 C/W Forward Surge Current (Note T A = 25 C I FSM 200 A Operating and Storage Temperature Range T J, T stg 65 to +75 C Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected.. Nonrepetitive current pulse per Figure 5 and derated above T A = 25 C per Figure /2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per minute maximum. NOTES: Please see.5ke6.8ca to.5ke250ca for Bidirectional Devices ELECTRICAL CHARACTERISTICS (T A = 25 C unless otherwise noted, V F = 3.5 V Max., I F (Note 3) = A) Symbol I PP Parameter Maximum Reverse Peak Pulse Current I F I V C Clamping I PP V RWM Working Peak Reverse Voltage I R V BR Maximum Reverse Leakage V RWM Breakdown I T V RWM V C V BR I R I T V F V I T Test Current V BR Maximum Temperature Coefficient of V BR I F Forward Current I PP V F Forward I F Uni Directional TVS 2 Publication Order Number:

3 ELECTRICAL CHARACTERISTICS (T A = 25 C unless otherwise noted, V F = 3.5 V I F (Note 3) = A) Device JEDEC Device (Note 4) Breakdown Voltage V I PP (Note 7) V RWM (Note 5) I V RWM V BR (Note 6) I T V C I PP V BR (Volts) ( A) Min Nom Max (ma) (Volts) (A) (%/ C).5KE6.8A, G N6267A, G KE7.5A, G N6268A, G KE8.2A, G N6269A, G KE9.A, G N6270A, G KE0A, G N627A, G KEA, G N6272A, G KE2A, G N6273A, G KE3A, G N6274A, G KE5A, G N6275A, G KE6A, G N6276A, G KE8A, G N6277A, G KE20A, G N6278A, G KE22A, G N6279A, G KE24A, G N6280A, G KE27A, G N628A, G KE30A, G N6282A, G KE33A, G N6283A, G KE36A, G N6284A, G KE39A, G N6285A, G KE43A, G N6286A, G KE47A, G N6287A, G KE5A, G N6288A, G KE56A, G N6289A, G KE62A, G N6290A, G KE68A, G N629A, G KE75A, G N6292A, G KE82A, G N6293A, G KE9A, G N6294A, G KEA, G N6295A, G KE0A, G N6296A, G KE20A, G N6297A, G KE30A, G N6298A, G KE50A, G N6299A, G KE60A, G N6300A, G KE70A, G N630A, G KE80A, G N6302A, G* KE200A, G N6303A, G KE220A, G KE250A, G Devices listed in bold, italic are Littelfuse Preferred devices. Preferred devices are recommended choices for future use and best overall value. 3. /2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per minute maximum. 4. Indicates JEDEC registered data 5. A transient suppressor is normally selected according to the maximum working peak reverse voltage (V RWM ), which should be equal to or greater than the dc or continuous peak operating voltage level. 6. V BR measured at pulse test current I T at an ambient temperature of 25 C 7. Surge current waveform per Figure 5 and derate per Figures and 2. The G suffix indicates Pb Free package available. *Not Available in the 500/Tape & Reel 3 Publication Order Number:

4 P PK, PEAK POWER (kw) 0 0. s Figure. Pulse Rating Curve NONREPETITIVE PULSE WAVEFORM SHOWN IN FIGURE 5 s 0 s s ms 0 ms t P, PULSE WIDTH PEAK PULSE DERATING IN % OF PEAK POWER OR TA = 25 C T A, AMBIENT TEMPERATURE ( C) Figure 2. Pulse Derating Curve N6373, ICTE-5, MPTE-5, through N6389, ICTE-45, C, MPTE-45, C N6267A/.5KE6.8A through N6303A/.5KE200A 0,000 ZERO BIAS 0,000 ZERO BIAS C, CAPACITANCE (pf) 0 V RWM C, CAPACITANCE (pf) 0 V RWM V BR, BREAKDOWN VOLTAGE (VOLTS) V BR, BREAKDOWN VOLTAGE (VOLTS) Figure 3. Capacitance versus Breakdown Voltage P D, STEADY STATE POWER DISSIPATION (WATTS) / T L, LEAD TEMPERATURE ( C) 3/8, VALUE (%) IPP 50 t r PEAK VALUE I PP t P HALF VALUE PULSE WIDTH (t P ) IS DEFINED AS THAT POINT WHERE THE PEAK CURRENT DECAYS TO 50% OF I PP. tr 0 s t, TIME (ms) I PP 2 Figure 4. Steady State Power Derating Figure 5. Pulse Waveform 4

5 IT, TEST CURRENT (AMPS) T L = 25 C t P = 0 s N6373, ICTE-5, MPTE-5, through N6389, ICTE-45, C, MPTE-45, C V BR(NOM) = 6.8 to 3 V 20 V 24 V 43 V IT, TEST CURRENT (AMPS) T L = 25 C t P = 0 s.5ke6.8ca through.5ke200ca V BR(NOM) = 6.8 to 3 V 20 V 24 V 43 V 75 V 80 V 20 V V BR, INSTANTANEOUS INCREASE IN V BR ABOVE V BR(NOM) (VOLTS) Figure 6. Dynamic Impedance V BR, INSTANTANEOUS INCREASE IN V BR ABOVE V BR(NOM) (VOLTS) DERATING FACTOR PULSE WIDTH 0. 0 ms ms s 0 s D, DUTY CYCLE (%) Figure 7. Typical Derating Factor for Duty Cycle APPLICATION NOTES RESPONSE TIME In most applications, the transient suppressor device is placed in parallel with the equipment or component to be protected. In this situation, there is a time delay associated with the capacitance of the device and an overshoot condition associated with the inductance of the device and the inductance of the connection method. The capacitance effect is of minor importance in the parallel protection scheme because it only produces a time delay in the transition from the operating voltage to the clamp voltage as shown in Figure 8. The inductive effects in the device are due to actual turn-on time (time required for the device to go from zero current to full current) and lead inductance. This inductive effect produces an overshoot in the voltage across the equipment or component being protected as shown in Figure 9. Minimizing this overshoot is very important in the application, since the main purpose for adding a transient suppressor is to clamp voltage spikes. These devices have excellent response time, typically in the picosecond range and negligible inductance. However, external inductive effects could produce unacceptable overshoot. Proper circuit layout, minimum lead lengths and placing the suppressor device as close as possible to the equipment or components to be protected will minimize this overshoot. Some input impedance represented by Z in is essential to prevent overstress of the protection device. This impedance should be as high as possible, without restricting the circuit operation. DUTY CYCLE DERATING The data of Figure applies for non-repetitive conditions and at a lead temperature of 25 C. If the duty cycle increases, the peak power must be reduced as indicated by the curves of Figure 7. Average power must be derated as the lead or 5 Publication Order Number:

6 ambient temperature rises above 25 C. The average power derating curve normally given on data sheets may be normalized and used for this purpose. At first glance the derating curves of Figure 7 appear to be in error as the 0 ms pulse has a higher derating factor than the 0 s pulse. However, when the derating factor for a given pulse of Figure 7 is multiplied by the peak power value of Figure for the same pulse, the results follow the expected trend. TYPICAL PROTECTION CIRCUIT Z in V in LOAD V L V V in (TRANSIENT) V OVERSHOOT DUE TO INDUCTIVE EFFECTS V in (TRANSIENT) V L V L V in t d t D = TIME DELAY DUE TO CAPACITIVE EFFECT t t Figure 8. Figure 9. The entire series has Underwriters Laboratory Recognition for the classification of protectors (QVGV2) under the UL standard for safety 497B and File #60. Many competitors only have one or two devices recognized or have recognition in a non-protective category. Some competitors have no recognition at all. With the UL497B recognition, our parts successfully passed several tests including Strike Voltage Breakdown test, Endurance. Clipper-bidirectional devices are available in the.5kexxa series and are designated with a CA suffix; for example,.5ke8ca. Contact your nearest Littelfuse representative. 2. Clipper-bidirectional part numbers are tested in both directions to electrical parameters in preceding table (except for V F which does not apply). UL RECOGNITION* CLIPPER BIDIRECTIONAL DEVICES Conditioning, Temperature test, Dielectric Voltage- Withstand test, Discharge test and several more. Whereas, some competitors have only passed a flammability test for the package material, we have been recognized for much more to be included in their Protector category. *Applies to.5ke6.8a, CA thru.5ke250a, CA 3. The N6267A through N6303A series are JEDEC registered devices and the registration does not include a CA suffix. To order clipper-bidirectional devices one must add CA to the.5ke device title. 6 Publication Order Number:

7 OUTLINE DIMENSIONS CASE 4A 04 ISSUE D B P P D K A NOTES:. DIMENSIONING AND TOLERANCING PER ANSI Y4.5M, CONTROLLING DIMENSION: INCH. 3. LEAD FINISH AND DIAMETER UNCONTROLLED IN DIMENSION P A 0 THRU 04A 03 OBSOLETE, NEW STANDARD 04A 04. INCHES MILLIMETERS DIM MIN MAX MIN MAX A B D K P K 7 Publication Order Number:

8 Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. Littelfuse.com 8 Publication Order Number:

1.5SMC6.8AT3G Series, SZ1.5SMC6.8AT3G Series Watt Peak Power Zener Transient Voltage Suppressors. Unidirectional*

1.5SMC6.8AT3G Series, SZ1.5SMC6.8AT3G Series Watt Peak Power Zener Transient Voltage Suppressors. Unidirectional* .6.8AT3G Series, SZ.6.8AT3G Series 00 Watt Peak Power Zener Transient Voltage Suppressors Unidirectional* The series is designed to protect voltage sensitive components from high voltage, high energy transients.