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Vishay General Semiconductor - Diodes Division SMB10J20AHM3_A/H
- Part No.:
- SMB10J20AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J20AHM3_A/H.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,377
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Product details
Overview
SMB10J20AHM3_A/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on power and signal lines. It features a 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR), 32.4 V clamping voltage (VC) at 30.9 A peak pulse current (IPPM), and 1000 W peak pulse power (PPPM) with 10/1000 µs waveform - optimized for automotive-grade ESD and load-dump protection in engine control units and sensor interfaces.
For engineers reviewing the SMB10J20AHM3_A/H datasheet, SMB10J20AHM3_A/H pinout, SMB10J20AHM3_A/H application, or SMB10J20AHM3_A/H equivalent, this device is evaluated for AEC-Q101 qualification, low incremental surge resistance, fast response time (<1 ns), and compatibility with automated SMT placement on PCBs requiring robust transient immunity per ISO 7637-2 and IEC 61000-4-5.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping protection device that conducts above its breakdown threshold to shunt transient energy away from sensitive downstream circuitry. Its glass-passivated junction ensures stable leakage performance (<1 µA at VWM) and long-term reliability under repeated surge stress.
The SMB10J20AHM3_A/H delivers 1000 W peak pulse power handling with a clamping ratio (VC/VBR) of ~1.45 and thermal resistance of 20 °C/W (junction-to-lead), enabling effective heat dissipation during 8.3 ms surge events up to 100 A forward surge current (IFSM). It meets MSL level 1 per J-STD-020 and supports lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 24 V automotive systems. |
| VBR (min/max) | 22.2 V / 24.5 V - breakdown occurs within this range at 1 mA test current; ensures consistent turn-on across temperature and unit variation. |
| VC @ IPPM | 32.4 V at 30.9 A - clamping voltage limits downstream IC stress during 10/1000 µs transients; critical for protecting 3.3 V or 5 V logic rails. |
| PPPM | 1000 W - peak pulse power rating with 10/1000 µs waveform; enables compliance with ISO 7637-2 Pulse 5a (load dump) requirements. |
| IFSM | 100 A - non-repetitive forward surge current capability; supports robustness against inductive kickback in motor driver circuits. |
| TJ max. | +150 °C - maximum junction temperature; allows operation in under-hood automotive environments without derating. |
| AEC-Q101 | Qualified - validated for automotive electronics per stress test standard; required for ECUs, ADAS sensors, and body control modules. |
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. Cathode indicated by color band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to protected line (e.g., battery rail); conducts during positive transients when cathode is grounded. |
| Cathode | Current exit terminal in forward bias; marked with band | Typically tied to ground or low-impedance return path; defines polarity-sensitive clamping direction for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock - required for Tier-1 OEM designs. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD >15 kV), improving clamping precision and system immunity. |
| Glass passivated junction | Enhances long-term stability of leakage current and breakdown voltage under thermal/humidity stress, reducing field failure risk. |
| MSL Level 1 rating | Enables standard SMT reflow without moisture sensitivity concerns; no baking required prior to assembly. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and automotive material compliance standards (e.g., GMW3172, Ford WSS-M99P9999-A1). |
Applications
| Engine Control Unit (ECU) Power Input | Automotive Camera Sensor Interface |
|---|---|
Use Scenario: Protects 24 V supply input of diesel/gasoline ECU against load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and DC-DC input stage. Use Value: Limits voltage to ≤32.4 V during 100 V/100 ms load dump, preventing overvoltage damage to buck controller ICs and microcontrollers. |
Use Scenario: Shields MIPI CSI-2 data lines and 12 V bias rail of rear-view camera module from ESD (IEC 61000-4-2) and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential video pair and power line; mounted adjacent to connector. Use Value: Clamps 8 kV contact ESD pulses within <1 ns while maintaining signal integrity due to minimal parasitic capacitance (<100 pF). |
| Body Control Module (BCM) LIN Bus | Electric Power Steering (EPS) Motor Driver |
Use Scenario: Guards LIN transceiver pins against battery feed transients and electrostatic coupling in door module assemblies. IC Role / Device Role / Timing Role: Unidirectional TVS on LIN bus line (VBAT-side) with cathode grounded. Use Value: Maintains LIN communication integrity by limiting transient excursions to <35 V, avoiding transceiver latch-up or reset. |
Use Scenario: Suppresses inductive kickback from H-bridge MOSFETs driving EPS assist motor during PWM switching. IC Role / Device Role / Timing Role: High-power TVS on low-side MOSFET source node and gate drive return path. Use Value: Absorbs 1000 W surges from 100 A motor current interruption, preventing gate oxide rupture and driver IC failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20AHE3_A/H | Same VWM (20 V), VBR (22.2–24.5 V), VC (32.4 V), but rated for 600 W PPPM (vs. 1000 W); lower IPPM (18.5 A). | Not suitable for ISO 7637-2 Pulse 5a; limited to lower-energy transients like ESD or relay bounce. | Select only if system-level surge testing confirms <600 W requirement and cost optimization is prioritized. |
| SMCJ20AHE3_A/H | Same electrical specs but in larger SMC (DO-214AB) package; higher thermal mass yields RθJL = 15 °C/W (vs. 20 °C/W) and 1500 W PPPM. | Requires larger PCB footprint; better suited for high-duty-cycle industrial motor drives than space-constrained automotive modules. | Choose when board layout allows SMC footprint and higher surge margin (>1000 W) is needed without changing circuit topology. |
Compared with SMBJ20AHE3_A/H, SMB10J20AHM3_A/H provides 67% higher peak pulse power and 67% higher IPPM for equivalent clamping performance - essential for automotive load-dump immunity. Against SMCJ20AHE3_A/H, it trades 25% lower thermal resistance for 30% smaller PCB area, making it optimal for compact ECU and sensor modules.
Availability
SMB10J20AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial motor controls, and telecom infrastructure requiring stable component supply with AEC-Q101 validation, halogen-free compliance, and high-reliability surge immunity.
Supply support for SMB10J20AHM3_A/H 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, MOSFETs, and protection devices with emphasis on automotive, industrial, and computing applications.
The SMB10J series is engineered specifically for high-power-density transient suppression in space-constrained automotive modules, balancing AEC-Q101 reliability, 1000 W surge capability, and SMT manufacturability in the SMB footprint.
FAQ
What is the clamping voltage of SMB10J20AHM3_A/H at its rated peak pulse current?
The SMB10J20AHM3_A/H has a maximum clamping voltage (VC) of 32.4 V at 30.9 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMB10J20AHM3_A/H suitable for bidirectional transient protection?
No, SMB10J20AHM3_A/H is a unidirectional TVS diode, intended for DC-biased lines where transients occur primarily in one polarity (e.g., automotive battery rails). For bidirectional protection (e.g., AC lines or data buses), the SMB8J20CAHM3_A/H variant - with symmetrical breakdown and 800 W PPPM - must be used instead.
Does SMB10J20AHM3_A/H meet automotive qualification standards?
Yes, SMB10J20AHM3_A/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with automotive-grade reliability testing. It is approved for use in engine control units, body electronics, and ADAS sensors per OEM stress requirements.
What is the thermal resistance specification for SMB10J20AHM3_A/H?
SMB10J20AHM3_A/H has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, measured under standard mounting conditions (0.2" × 0.2" copper pads per terminal). This enables efficient heat transfer to the PCB during repetitive surge events and supports sustained operation at TJ ≤ +150 °C.
How does the SMB10J20AHM3_A/H differ from the SMBJ20AHE3_A/H in surge handling capability?
SMB10J20AHM3_A/H delivers 1000 W peak pulse power (PPPM) versus 600 W for SMBJ20AHE3_A/H - a 67% increase - due to optimized chip geometry and packaging. This enables SMB10J20AHM3_A/H to withstand ISO 7637-2 Pulse 5a load-dump events, while SMBJ20AHE3_A/H is limited to lower-energy transients like ESD or relay switching.
SMB10J20AHM3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 30.9A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J20AHM3_A/H FAQ
1.How can I place an order for SMB10J20AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J20AHM3_A/H 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 SMB10J20AHM3_A/H reliable?
The price and inventory of SMB10J20AHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J20AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMB10J20AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J20AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J20AHM3_A/H?
SMB10J20AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J20AHM3_A/H 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 SMB10J20AHM3_A/H?
For technical support, including SMB10J20AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J20AHM3_A/H requirements.
6.How does Aetrix verify that SMB10J20AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB10J20AHM3_A/H 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 SMB10J20AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMB10J20AHM3_A/H?
All SMB10J20AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J20AHM3_A/H, 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 SMB10J20AHM3_A/H part is unused and in its original packaging.
Return procedure for SMB10J20AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J20AHM3_A/H Tags
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