My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB10J20AHM3_A/I
- Part No.:
- SMB10J20AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J20AHM3_A/I.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,098
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB10J20AHM3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection with 1000 W peak pulse power (10/1000 µs), 20 V stand-off voltage (VWM), and 32.4 V clamping voltage (VC) at 30.9 A peak pulse current. It is AEC-Q101 qualified and used to protect automotive sensor signal lines, MOSFET gates, and microcontroller I/O against inductive switching transients.
For engineers reviewing the SMB10J20AHM3_A/I datasheet, SMB10J20AHM3_A/I pinout, SMB10J20AHM3_A/I application, or SMB10J20AHM3_A/I equivalent, key selection criteria include clamping performance under 10/1000 µs surge, AEC-Q101 qualification status, unidirectional polarity, thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance, enabling effective suppression of ESD and lightning-induced transients per IEC 61000-4-2 and ISO 7637-2. Its unidirectional configuration provides asymmetric clamping-low forward voltage drop (VF = 3.5 V at 50 A) and precise reverse breakdown (22.2–24.5 V at 1 mA).
Thermally, it operates from –55 °C to +150 °C junction temperature, with RθJL = 20 °C/W ensuring efficient heat transfer to PCB leads. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification-verified per stress test conditions including temperature cycling, HTRB, and UHAST.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal line bias margin |
| VBR min/max | 22.2 V / 24.5 V at 1 mA - tight breakdown tolerance ensures predictable turn-on during overvoltage events |
| VC @ IPPM | 32.4 V at 30.9 A - clamping voltage limits downstream IC stress during 10/1000 µs surge |
| PPPM | 1000 W - peak pulse power rating determines survivability against high-energy transients |
| IFSM | 100 A - non-repetitive forward surge current rating supports robustness against accidental polarity reversal |
| TJ max | +150 °C - enables operation in under-hood automotive environments without derating |
| RθJA | 72 °C/W - thermal resistance guides PCB pad design (0.2" × 0.2" copper required for full rating) |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by color band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side connection | Connected to ground or low-impedance return path; must handle 100 A surge without bond wire failure |
| Cathode | Reverse-biased clamping node / protected line interface | Connected to protected signal line (e.g., CAN_H, LIN, sensor output); clamps to ≤32.4 V during surge |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive use across temperature cycling, humidity, and mechanical shock per Rev G requirements |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to moisture-induced parameter drift in harsh environments |
| MSL Level 1 (260 °C peak) | Enables single-reflow assembly without popcorn cracking or delamination risk |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive OEM material compliance mandates and JEDEC JESD201 Class 2 whisker resistance |
Applications
| Automotive Sensor Protection | Power Supply Rail Clamping |
|---|---|
|
Use Scenario: Protecting analog output lines of engine coolant temperature (ECT) and manifold absolute pressure (MAP) sensors from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and MCU ADC input to clamp transients before signal conditioning stage. Use Value: Limits voltage excursion to ≤32.4 V during 1000 W surges, preserving 12-bit ADC accuracy and preventing latch-up in automotive-grade microcontrollers. |
Use Scenario: Safeguarding 24 V industrial PLC I/O power rails against inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Parallel-connected TVS on VCC rail upstream of DC-DC converter input to absorb energy before regulation stage. Use Value: Withstands 100 A single-half-sine surge (IFSM), preventing rail collapse and maintaining logic supply integrity during actuator switching. |
| Automotive LIN Bus Protection | Microcontroller GPIO Protection |
|
Use Scenario: Shielding LIN transceiver TX/RX pins from ESD and battery disconnect transients in body control modules. IC Role / Device Role / Timing Role: Bidirectional-capable layout (though SMB10J20AHM3_A/I is unidirectional, used cathode-to-line for LIN dominant mode) placed at connector interface. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) within <1 ns, limiting bus voltage to 32.4 V and avoiding transceiver shutdown or data corruption. |
Use Scenario: Hardening GPIO pins of automotive infotainment SoCs against hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Point-of-use TVS mounted directly at SoC package edge, anode to GND, cathode to GPIO trace. Use Value: 1.0 µA max leakage at 20 V VWM preserves sleep-mode current budget; 32.4 V VC prevents CMOS gate oxide breakdown during 15 kV air discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20AHE3_A/H | Same VWM (20 V), VBR (22.2–24.5 V), and PPPM (1000 W), but E3 suffix indicates commercial-grade (non-AEC-Q101) and RoHS-compliant only (not halogen-free) | Lacks AEC-Q101 qualification and halogen-free certification; suitable for industrial/commercial, not automotive Tier-1 designs | Select when AEC-Q101 and halogen-free requirements are waived; lower cost, same electrical performance |
| SAC20 | Lower PPPM (600 W), higher VC (36 V at 16.7 A), same SMB package; SAC series uses different chip construction with higher leakage (5 µA vs. 1 µA) | Reduced surge handling margin; higher clamping increases risk of downstream IC damage in high-energy automotive transients | Use only where system-level testing confirms 600 W surge immunity is sufficient and 36 V VC remains within IC absolute max ratings |
Compared with SMB10J20AHM3_A/I, SMBJ20AHE3_A/H offers identical clamping and power specs but lacks automotive qualification, while SAC20 trades surge capacity and clamping precision for cost-making SMB10J20AHM3_A/I the optimal choice for AEC-Q101–mandated, high-reliability vehicle subsystems.
Availability
SMB10J20AHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and microcontroller GPIO hardening requiring stable component supply, long-term lifecycle support, and AEC-Q101–compliant sourcing.
Supply support for SMB10J20AHM3_A/I 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, and protection devices with emphasis on reliability, thermal performance, and automotive-grade validation.
The SMB10JxxA series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101–qualified surge protection in automotive powertrain, chassis, and body electronics.
FAQ
What is the clamping voltage of SMB10J20AHM3_A/I at its rated peak pulse current?
The SMB10J20AHM3_A/I has a maximum clamping voltage (VC) of 32.4 V at 30.9 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry sees no more than 32.4 V during a full-rated transient event. The SMB10J20AHM3_A/I maintains this clamping performance across its operational temperature range (–55 °C to +150 °C), with minor derating above 25 °C ambient per Figure 2 in the datasheet.
Is SMB10J20AHM3_A/I suitable for bidirectional signal line protection like CAN or LIN?
No-SMB10J20AHM3_A/I is a unidirectional TVS diode, meaning it conducts only in reverse bias and blocks forward current beyond ~3.5 V. For true bidirectional protection (e.g., CAN_H/CAN_L or LIN bus), a bidirectional variant such as SMB8J20CAHM3_A/I is required. Using SMB10J20AHM3_A/I on a bidirectional line would short the signal during normal operation; always verify polarity alignment and select the correct device type per signal architecture.
Does SMB10J20AHM3_A/I require special PCB layout considerations?
Yes-the SMB10J20AHM3_A/I achieves its full 1000 W peak pulse power rating only when mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the datasheet. Smaller pads increase thermal resistance and reduce surge capability. Additionally, keep traces short and wide between the SMB10J20AHM3_A/I and protected node to minimize inductance, and avoid routing sensitive signals near its cathode/anode paths to prevent coupling.
How does the HM3 suffix affect the compliance and reliability of SMB10J20AHM3_A/I?
The HM3 suffix on SMB10J20AHM3_A/I denotes halogen-free, RoHS-compliant construction and full AEC-Q101 qualification-including stress tests for temperature cycling, high-temperature reverse bias (HTRB), and unbiased highly accelerated stress testing (UHAST). This makes SMB10J20AHM3_A/I acceptable for Tier-1 automotive applications where material content and long-term reliability under thermal/humidity stress are strictly audited, unlike E3/M3 variants which lack AEC-Q101 validation.
What is the maximum reverse leakage current of SMB10J20AHM3_A/I at its stand-off voltage?
The SMB10J20AHM3_A/I exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 20 V stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes quiescent power loss in battery-powered automotive modules. Leakage remains below 5 µA up to +85 °C and is fully characterized per the datasheet's Electrical Characteristics table.
SMB10J20AHM3_A/I 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/I FAQ
1.How can I place an order for SMB10J20AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J20AHM3_A/I 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/I reliable?
The price and inventory of SMB10J20AHM3_A/I 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/I is usually 5 days.
3.What payment methods are accepted for SMB10J20AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J20AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J20AHM3_A/I?
SMB10J20AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J20AHM3_A/I 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/I?
For technical support, including SMB10J20AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J20AHM3_A/I requirements.
6.How does Aetrix verify that SMB10J20AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB10J20AHM3_A/I 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/I meets industry standards.
7.What is the process for return or replacement of SMB10J20AHM3_A/I?
All SMB10J20AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J20AHM3_A/I, 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/I part is unused and in its original packaging.
Return procedure for SMB10J20AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J20AHM3_A/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
