# TVS Diode, PAR SM8S Series, Unidirectional, 26 V, 42.1 V, DO-218AB, 2 Pins ![Product image](https://novapart.co/image/farnell:3774849RL/) **URL**: https://novapart.co/products/SM8S26AHE3_A/I/tvs-diode-par-sm8s-series-unidirectional-26-v-421 **SKU**: SM8S26AHE3_A/I **Manufacturer**: VISHAY **Category**: Circuit Protection || TVS - Transient Voltage Suppressors || TVS Diodes **Price**: €1.1300 **Stock**: 200+ **Lead Time**: 71 days (indicative) ## Specifications | Parameter | Value | |---|---| | Svhc | Lead (04-Feb-2026) | | No. Of Pins | 2Pins | | Tvs Polarity | Unidirectional | | Product Range | PAR SM8S Series | | Qualification | AEC-Q101 | | Diode Mounting | Surface Mount | | Diode Case Style | DO-218AB | | Clamping Voltage Max | 42.1V | | Reverse Standoff Voltage | 26V | | Maximum Breakdown Voltage | 31.9V | | Minimum Breakdown Voltage | 28.9V | | Operating Temperature Max | 175°C | | Peak Pulse Power Dissipation | 6.6kW | ## Datasheet 📄 [Download PDF](https://novapart.co/datasheet/farnell:3774849RL/) **SM8S10A thru SM8S43A** Vishay General Semiconductor www.vishay.com ## **Surface Mount PAR[®] Transient Voltage Suppressors** High Temperature Stability and High Reliability Conditions ## **FEATURES** - Junction passivation optimized design passivated anisotropic rectifier technology - TJ = 175 °C capability suitable for high reliability and automotive requirement - Available in unidirectional polarity only - Low leakage current - Low forward voltage drop **==> picture [46 x 8] intentionally omitted <==** **----- Start of picture text -----**
DO-218AB
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Cathode Anode
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- High surge capability - Meets ISO7637-2 surge specification (varied by test condition) - Meets MSL level 1, per J-STD-020, LF maximum peak of 245 °C - AEC-Q101 qualified - Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 ## **PRIMARY CHARACTERISTICS** |**PRIMARY CHARACTERISTICS**|**PRIMARY CHARACTERISTICS**| |---|---| |VBR|11.1 V to 52.8 V| |VWM|10 V to 43 V| |PPPM(10 x 1000 μs)|6600 W| |PPPM(10 x 10 000 μs)|5200 W| |PD|8 W| |IFSM|700 A| |TJmax.|175 °C| |Polarity|Unidirectional| |Package|DO-218AB| ## **TYPICAL APPLICATIONS** Use in sensitive electronics protection against voltage transients induced by inductive load switching and lighting, especially for automotive load dump protection application. ## **MECHANICAL DATA** **Case:** DO-218AB Molding compound meets UL 94 V-0 flammability rating Base P/NHE3_X - RoHS-compliant and AEC-Q101 qualified (“X” denotes revision code e.g. A, B, ...) **Terminals:** matte tin plated leads, solderable per J-STD-002 and JESD 22-B102 HE3 suffix meets JESD 201 class 2 whisker test **Polarity:** heatsink is anode |**MAXIMUM RATINGS**(TC= 25 °C unless otherwise noted)|**MAXIMUM RATINGS**(TC= 25 °C unless otherwise noted)|**MAXIMUM RATINGS**(TC= 25 °C unless otherwise noted)|**MAXIMUM RATINGS**(TC= 25 °C unless otherwise noted)| |---|---|---|---| |**PARAMETER**|**SYMBOL**|**VALUE**|**UNIT**| |Peak pulse power dissipation
with 10/1000 μs waveform
with 10/10 000 μs waveform|PPPM|6600|W| |||5200|| |Power dissipation on infinite heatsink at TC= 25 °C (fig. 1)|PD|8.0|W| |Peak pulse current with 10/1000 μs waveform|IPPM (1)|See next table|A| |Peak forward surge current 8.3 ms single half sine-wave|IFSM|700|A| |Operatingjunction and storage temperature range|TJ, TSTG|-55 to +175|°C| ## **Note** > (1) Non-repetitive current pulse derated above TA = 25 °C Revision: 10-Nov-2023 Document Number: 88387 **1** For technical questions within your region: DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 **SM8S10A thru SM8S43A** www.vishay.com Vishay General Semiconductor ## **ELECTRICAL CHARACTERISTICS** (TC = 25 °C unless otherwise noted) |**ELECTRICAL CHARACTERISTICS**(TC= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS**(TC= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS**(TC= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS**(TC= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS**(TC= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS**(TC= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS**(TC= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS**(TC= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS**(TC= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS**(TC= 25 °C unless otherwise noted)|**ELECTRICAL CHARACTERISTICS**(TC= 25 °C unless otherwise noted)| |---|---|---|---|---|---|---|---|---|---|---| |**DEVICE**
**TYPE**|**BREAKDOWN**
**VOLTAGE**
**VBR (V)**|||**TEST**
**CURRENT**
**IT**
**(mA)**|**STAND-OFF**
**VOLTAGE**
**VWM**
**(V)**|**MAXIMUM**
**REVERSE**
**LEAKAGE**
**AT VWM**
**ID (μA)**|**MAXIMUM**
**REVERSE**
**LEAKAGE**
**AT VWM**
**TJ = 175 °C**
**ID (μA)**|**MAX. PEAK**
**PULSE**
**CURRENT**
**AT 10/1000 μs**
**WAVEFORM**
**(A)**|**MAXIMUM**
**CLAMPING**
**VOLTAGE**
**AT IPPM**
**VC (V)**|**TYPICAL**
**TEMP.**
**COEFFICIENT**
**OF VBR (1)**
α**T**
**(%/°C)**| ||**MIN.**|**NOM.**|**MAX.**|||||||| |SM8S10A|11.1|11.7|12.3|5.0|10.0|15|250|388|17.0|0.069| |SM8S11A|12.2|12.9|13.5|5.0|11.0|10|150|363|18.2|0.072| |SM8S12A|13.3|14.0|14.7|5.0|12.0|10|150|332|19.9|0.074| |SM8S13A|14.4|15.2|15.9|5.0|13.0|10|150|307|21.5|0.076| |SM8S14A|15.6|16.4|17.2|5.0|14.0|10|150|284|23.2|0.078| |SM8S15A|16.7|17.6|18.5|5.0|15.0|10|150|270|24.4|0.080| |SM8S16A|17.8|18.8|19.7|5.0|16.0|10|150|254|26.0|0.081| |SM8S17A|18.9|19.9|20.9|5.0|17.0|10|150|239|27.6|0.082| |SM8S18A|20.0|21.1|22.1|5.0|18.0|10|150|226|29.2|0.083| |SM8S20A|22.2|23.4|24.5|5.0|20.0|10|150|204|32.4|0.085| |SM8S22A|24.4|25.7|26.9|5.0|22.0|10|150|186|35.5|0.086| |SM8S24A|26.7|28.1|29.5|5.0|24.0|10|150|170|38.9|0.087| |SM8S26A|28.9|30.4|31.9|5.0|26.0|10|150|157|42.1|0.088| |SM8S28A|31.1|32.8|34.4|5.0|28.0|10|150|145|45.4|0.089| |SM8S30A|33.3|35.1|36.8|5.0|30.0|10|150|136|48.4|0.090| |SM8S33A|36.7|38.7|40.6|5.0|33.0|10|150|124|53.3|0.091| |SM8S36A|40.0|42.1|44.2|5.0|36.0|10|150|114|58.1|0.091| |SM8S40A|44.4|46.8|49.1|5.0|40.0|10|150|102|64.5|0.092| |SM8S43A|47.8|50.3|52.8|5.0|43.0|10|150|95.1|69.4|0.093| ## **Notes** - For all types maximum VF = 1.8 V at IF = 100 A measured on 8.3 ms single half sine-wave or equivalent square wave, duty cycle = 4 pulses per minute maximum - (1) To calculate VBR vs. junction temperature, use the following formula: VBR at TJ = VBR at 25 °C x (1 + αT x (TJ - 25)) |**THERMAL CHARACTERISTICS**(TC= 25 °C unless otherwise noted)|**THERMAL CHARACTERISTICS**(TC= 25 °C unless otherwise noted)|**THERMAL CHARACTERISTICS**(TC= 25 °C unless otherwise noted)|**THERMAL CHARACTERISTICS**(TC= 25 °C unless otherwise noted)| |---|---|---|---| |**PARAMETER**|**SYMBOL**|**VALUE**|**UNIT**| |Typical thermal resistance, junction to case|RθJC|0.90|°C/W| |**ORDERING INFORMATION**(Example)|**ORDERING INFORMATION**(Example)|**ORDERING INFORMATION**(Example)|**ORDERING INFORMATION**(Example)|**ORDERING INFORMATION**(Example)| |---|---|---|---|---| |**PREFERRED P/N**|**UNIT WEIGHT (g)**|**PREFERRED PACKAGE CODE**|**BASE QUANTITY**|**DELIVERY MODE**| |SM8S10AHE3_A/I(1)|2.605|I|750|13" diameter plastic tape and reel,
anode towards the sprocket hole| ## **Note** - (1) AEC-Q101 qualified Revision: 10-Nov-2023 Document Number: 88387 **2** For technical questions within your region: DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 **SM8S10A thru SM8S43A** www.vishay.com ## Vishay General Semiconductor ## **RATINGS AND CHARACTERISTICS CURVES** (TA = 25 °C unless otherwise noted) **==> picture [459 x 557] intentionally omitted <==** **----- Start of picture text -----**
8.0 10 000
6.0
4.0
2.0
0 1000
0 50 100 150 200 10 100
Case Temperature (°C) Pulse Width (ms) - ½ IPP Exponential WaveformPP Exponential Waveform Exponential Waveform
Fig. 1 - Power Derating Curve Fig. 4 - Reverse Power CapabilityReverse Power Capability
6000 100
5000
RθJAθJAJA
10
4000
3000 1 RθJCθJCJC
2000
0.1
1000
0 0.01
25 50 75 100 125 150 175 0.01 0.1 1 10 100
Case Temperature (°C) t - Pulse Width (s)
Fig. 2 - Load Dump Power Characteristics Fig. 5 - Typical Transient Thermal Impedance
(10 ms Exponential Waveform)
150 t r = 10 μs Pulse Width T J = 25 °C(td) is 100 000 f = 1.0 MHz TJ = 25 ° C
Peak Value Where the Peak CurrentDefined as the Point V sig = 50 mV p-p
I PPM Decays to 50 % of I PPM
100
Half Value - I PP 10 000 Measured at Zero Bias
IPPM 2
50
Measured at Stand-Off
t d Voltage VWM
0 1000
0 10 20 30 40 10 15 20 25 30 35 40 45
t - Time (ms) VWM - Reverse Stand-Off Voltage (V)
Power Dissipation (W)
Reverse Surge Power (W)
Load Dump Power (W)
Transient Thermal Impedance (°C/W)
Input Peak Pulse Current (%) - Junction Capacitance (pF)J
C
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10 000
1000
10 100
Pulse Width (ms) - ½ IPP Exponential WaveformPP Exponential Waveform Exponential Waveform
Fig. 4 - Reverse Power CapabilityReverse Power Capability
100
RθJAθJAJA
10
1 RθJCθJCJC
0.1
0.01
0.01 0.1 1 10 100
t - Pulse Width (s)
Reverse Surge Power (W)
Transient Thermal Impedance (°C/W)
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Fig. 6 - Typical Junction Capacitance
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Fig. 3 - Pulse Waveform Revision: 10-Nov-2023 Document Number: 88387 **3** For technical questions within your region: DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 **SM8S10A thru SM8S43A** www.vishay.com ## Vishay General Semiconductor ## **PACKAGE OUTLINE DIMENSIONS** in inches (millimeters) **==> picture [410 x 213] intentionally omitted <==** **----- Start of picture text -----**
DO-218AB
0.628 (16.0)
0.592 (15.0)
0.539 (13.7) Mounting Pad Layout
0.524 (13.3) 0.150 (3.8)
0.116 (3.0) 0.126 (3.2)
0.093 (2.4)
0.091 (2.3)
0.413 (10.5) 0.342 (8.7) 0.067 (1.7)
0.374 (9.5) 0.327 (8.3)
0.413 (10.5) 0.116 (3.0)
0.374 (9.5) 0.093 (2.4)
0.366 (9.3)
0.343 (8.7)
0.406 (10.3) 0.366 (9.3)
0.382 (9.7) Lead 1 0.343 (8.7)
0.606 (15.4)
0.197 (5.0) 0.583 (14.8)
0.185 (4.7) 0.138 (3.5)
0.098 (2.5)
0.098 (2.5)
0.016 (0.4) MIN.
0.059 (1.5)
Lead 2/Metal Heatsink 0.028 (0.7)
0.020 (0.5)
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Revision: 10-Nov-2023 Document Number: 88387 **4** For technical questions within your region: DiodesAmericas@vishay.com, DiodesAsia@vishay.com, DiodesEurope@vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 **Legal Disclaimer Notice** Vishay www.vishay.com ## **Disclaimer** ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special, consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular purpose, non-infringement and merchantability. Statements regarding the suitability of products for certain types of applications are based on Vishay's knowledge of typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements about the suitability of products for a particular application. It is the customer's responsibility to validate that a particular product with the properties described in the product specification is suitable for use in a particular application. Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over time. All operating parameters, including typical parameters, must be validated for each customer application by the customer's technical experts. Product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited to the warranty expressed therein. Hyperlinks included in this datasheet may direct users to third-party websites. These links are provided as a convenience and for informational purposes only. Inclusion of these hyperlinks does not constitute an endorsement or an approval by Vishay of any of the products, services or opinions of the corporation, organization or individual associated with the third-party website. Vishay disclaims any and all liability and bears no responsibility for the accuracy, legality or content of the third-party website or for that of subsequent links. Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining applications or for any other application in which the failure of the Vishay product could result in personal injury or death. Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners. _**© 2024 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED**_ Revision: 01-Jan-2024 Document Number: 91000 **1** For technical questions, contact: THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 **Legal Disclaimer Notice** Vishay www.vishay.com ## **Disclaimer** ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special, consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular purpose, non-infringement and merchantability. Statements regarding the suitability of products for certain types of applications are based on Vishay's knowledge of typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements about the suitability of products for a particular application. It is the customer's responsibility to validate that a particular product with the properties described in the product specification is suitable for use in a particular application. Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over time. All operating parameters, including typical parameters, must be validated for each customer application by the customer's technical experts. Product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited to the warranty expressed therein. Hyperlinks included in this datasheet may direct users to third-party websites. These links are provided as a convenience and for informational purposes only. Inclusion of these hyperlinks does not constitute an endorsement or an approval by Vishay of any of the products, services or opinions of the corporation, organization or individual associated with the third-party website. Vishay disclaims any and all liability and bears no responsibility for the accuracy, legality or content of the third-party website or for that of subsequent links. Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining applications or for any other application in which the failure of the Vishay product could result in personal injury or death. Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners. _**© 2024 VISHAY INTERTECHNOLOGY, INC. ALL RIGHTS RESERVED**_ Revision: 01-Jan-2024 Document Number: 91000 **1** For technical questions, contact: THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. 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