My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB10J18AHE3_B/I
- Part No.:
- SMB10J18AHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J18AHE3_B/I.pdf
- Description:
- 1KW,18V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,589
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB10J18AHE3_B/I 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 18 V stand-off voltage (VWM), 20.0–22.1 V breakdown voltage (VBR), 29.2 V clamping voltage (VC) at 34.2 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 SMB10J18AHE3_B/I datasheet, SMB10J18AHE3_B/I pinout, SMB10J18AHE3_B/I application, or SMB10J18AHE3_B/I equivalent, key selection criteria include AEC-Q101 qualification, unidirectional polarity with cathode band marking, low incremental surge resistance, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a silicon avalanche diode that enters controlled breakdown above its VWM to clamp transient overvoltages. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 µA at 18 V), while thermal resistance RθJA = 72 °C/W enables reliable operation up to TJ = 150 °C under repetitive surge conditions.
The SMB10J18AHE3_B/I delivers fast response time (<1.0 ps), meets ANSI/IEEE C62.35 standards for surge suppression, and is rated for non-repetitive 100 A forward surge current (IFSM) - making it suitable for protecting MOSFET gates, microcontroller I/O, and CAN/LIN bus transceivers against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for 12 V automotive systems. |
| VBR min/max | 20.0 V / 22.1 V at IT = 1.0 mA - tight breakdown window ensures predictable turn-on and minimal overshoot during transients. |
| VC @ IPPM | 29.2 V at IPPM = 34.2 A (10/1000 µs) - clamping voltage limits stress on downstream ICs during 1000 W surge events. |
| PPPM | 1000 W - peak pulse power rating confirms robustness against high-energy load dump and inductive switching spikes. |
| IFSM | 100 A - single half-sine surge rating supports protection of power FETs and relay drivers without fuse coordination issues. |
| TJ max | +150 °C - junction temperature limit enables use in under-hood automotive environments with minimal derating. |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD per AEC standard. |
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; polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-to-cathode conduction path | Reverse-biased during normal operation; conducts when transient exceeds VBR to shunt current to ground. |
| Anode (non-banded end) | Reference/ground return path | Connected to system ground or low-impedance return plane; completes clamping loop during surge events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors. |
| Glass passivated junction | Ensures long-term VBR stability and low leakage drift across temperature and lifetime stress. |
| MSL Level 1 (260 °C peak) | Enables standard reflow assembly without pre-baking; compatible with high-volume SMT lines. |
| Low profile SMB package | 0.220" × 0.130" footprint saves board space vs. larger DO-214AB/DO-214AC packages. |
| 1000 W peak pulse power | Supports protection against ISO 7637-2 Pulse 5a (load dump) without external series impedance. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V supply rail and LIN bus pins in engine control modules exposed to alternator load dump and starter motor kickback. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy before it reaches MCU power rails and communication transceivers. Use Value: Prevents latch-up or permanent damage to ASIL-B compliant microcontrollers during ISO 7637-2 Pulse 5a (100 V, 400 ms) events. |
Use Scenario: Safeguarding analog output lines (4–20 mA) and digital I/O of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Fast-clamping device placed at connector entry point to divert induced lightning or EFT bursts. Use Value: Maintains signal integrity below 29.2 V clamping threshold, preserving ADC reference accuracy and preventing false triggers. |
| Automotive Body Control Module (BCM) | Consumer Appliance Motor Drive |
Use Scenario: Shielding power window, mirror, and seat actuator driver ICs from inductive flyback spikes generated by brushed DC motors. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing stored inductor energy during MOSFET turn-off. Use Value: Eliminates need for snubber RC networks; reduces BOM count and PCB area while meeting CISPR 25 Class 5 EMC requirements. |
Use Scenario: Protecting gate drivers and microcontroller GPIOs in smart washing machine motor inverters subjected to mains-borne surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on low-side switch node and microcontroller reset line. Use Value: Withstands 1000 W pulses without degradation, enabling 10-year field reliability in harsh household electrical environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18AHE3_A/H | Same VWM/VBR/VC specs; identical SMB package; differs only in tape-and-reel packaging (750 pcs vs. 3200 pcs) and revision code (A vs. B). | No functional difference; suitable for same automotive and industrial designs requiring AEC-Q101 compliance. | Select SMBJ18AHE3_A/H for smaller batch prototyping; SMB10J18AHE3_B/I preferred for high-volume production due to larger reel quantity. |
| 1.5SMC18AHE3/A | Higher power (1500 W PPPM), larger SMC (DO-214AB) package, same VWM/VBR/VC; RθJA = 40 °C/W vs. 72 °C/W. | Better thermal performance for sustained surge duty cycles; requires larger PCB footprint and different pad layout. | Choose 1.5SMC18AHE3/A only if system-level testing shows SMB10J18AHE3_B/I thermal margin insufficient under repeated surge conditions. |
Compared with SMBJ18AHE3_A/H, SMB10J18AHE3_B/I offers identical electrical performance with optimized logistics for volume manufacturing; versus 1.5SMC18AHE3/A, it trades higher power density for compact size and lower thermal mass - ideal where board space and cost per unit are prioritized over extreme thermal endurance.
Availability
SMB10J18AHE3_B/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and consumer appliance motor drive circuits requiring stable component supply, AEC-Q101 qualification, and RoHS-compliant sourcing.
Supply support for SMB10J18AHE3_B/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, TVS devices, and optoelectronics with emphasis on reliability, precision, and automotive-grade validation.
The SMB10J series is engineered specifically for high-power-density transient suppression in space-constrained automotive and industrial applications, balancing clamping performance, thermal efficiency, and manufacturability.
FAQ
What is the clamping voltage of SMB10J18AHE3_B/I at its rated peak pulse current?
The SMB10J18AHE3_B/I has a maximum clamping voltage (VC) of 29.2 V when subjected to its rated peak pulse current (IPPM) of 34.2 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components remain within safe operating voltage limits during surge events. The SMB10J18AHE3_B/I maintains this clamping performance across its full operating temperature range.
Is SMB10J18AHE3_B/I suitable for bidirectional signal line protection?
No - SMB10J18AHE3_B/I is a unidirectional TVS diode, intended for DC power rail or single-polarity signal line protection where polarity is fixed. For bidirectional applications such as AC lines or differential buses like RS-485, the bidirectional variant SMB8J18CAHE3_B/I (with symmetric VBR and VC) must be used instead. Using SMB10J18AHE3_B/I on bidirectional signals risks forward conduction and improper clamping behavior.
Does SMB10J18AHE3_B/I require a heatsink for standard automotive operation?
No heatsink is required for SMB10J18AHE3_B/I under typical automotive duty cycles. Its RθJA of 72 °C/W and TJ max of +150 °C allow safe operation with 5.0 mm × 5.0 mm copper pads per terminal, as specified in the Vishay datasheet. Thermal simulation or testing is recommended only for systems with >10 surges per hour or ambient temperatures exceeding +105 °C - otherwise, the SMB10J18AHE3_B/I performs reliably without additional thermal management.
How does the HE3 suffix affect the specifications of SMB10J18AHE3_B/I?
HE3 denotes RoHS-compliant construction with AEC-Q101 qualification - it does not alter electrical or thermal parameters. The "HE3" suffix confirms the SMB10J18AHE3_B/I meets automotive reliability standards including temperature cycling, highly accelerated life testing (HALT), and electrostatic discharge (ESD) per AEC-Q101 Rev G. All electrical characteristics, package dimensions, and pinout remain identical to non-HE3 variants; only material content and qualification status differ.
Can SMB10J18AHE3_B/I replace SMAJ18A in an existing design?
SMB10J18AHE3_B/I is not a direct drop-in replacement for SMAJ18A due to package differences: SMAJ18A uses SMA (DO-214AC), while SMB10J18AHE3_B/I uses SMB (DO-214AA) - 0.220" × 0.130" vs. 0.236" × 0.130". Though both have identical VWM/VBR/VC ratings, the SMB variant requires updated stencil and footprint. Electrical performance is comparable, but mechanical fit and thermal dissipation (RθJA 72 vs. 65 °C/W) differ; redesign verification is required before substitution.
SMB10J18AHE3_B/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 34.2A
- 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)
SMB10J18AHE3_B/I FAQ
1.How can I place an order for SMB10J18AHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J18AHE3_B/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 SMB10J18AHE3_B/I reliable?
The price and inventory of SMB10J18AHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J18AHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMB10J18AHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J18AHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J18AHE3_B/I?
SMB10J18AHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J18AHE3_B/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 SMB10J18AHE3_B/I?
For technical support, including SMB10J18AHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J18AHE3_B/I requirements.
6.How does Aetrix verify that SMB10J18AHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB10J18AHE3_B/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 SMB10J18AHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMB10J18AHE3_B/I?
All SMB10J18AHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J18AHE3_B/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 SMB10J18AHE3_B/I part is unused and in its original packaging.
Return procedure for SMB10J18AHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J18AHE3_B/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 …
