My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ8.5AHE3_A/H
;;2.jpg)
- Part No.:
- SMBJ8.5AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ8.5AHE3_A/H.pdf
- Description:
- TVS DIODE 8.5VWM 14.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,032
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ8.5AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features 8.5 V stand-off voltage (VWM), 9.44–10.4 V breakdown voltage (VBR) at 1 mA, 14.4 V maximum clamping voltage (VC) at 41.7 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFET gates, microcontroller I/O, and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ8.5AHE3_A/H datasheet, SMBJ8.5AHE3_A/H pinout, SMBJ8.5AHE3_A/H application, or SMBJ8.5AHE3_A/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 °C to +150 °C), and compliance with UL 497B for surge protector classification.
Technical Context
This TVS diode operates as a voltage-clamping device that remains high-impedance below VWM (8.5 V) and transitions rapidly (<1 ns) into low-impedance conduction above VBR (min. 9.44 V) to divert transient energy away from protected circuitry. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
The SMBJ8.5AHE3_A/H is rated for 600 W peak pulse power per 10/1000 µs waveform at TA = 25 °C, with derating above 25 °C per Fig. 2; it supports 100 A non-repetitive forward surge current (IFSM) and exhibits 0.073 %/°C temperature coefficient of VBR - critical for precision clamping across automotive and industrial ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous reverse operating voltage before leakage exceeds 20 µA; defines safe DC bias margin for protected line. |
| VBR (min/max) | 9.44 V / 10.4 V at IT = 1 mA - guaranteed breakdown onset window; determines earliest clamping activation threshold. |
| VC @ IPPM | 14.4 V at 41.7 A - maximum clamped voltage during 600 W transient; sets worst-case overvoltage seen by downstream IC. |
| PPPM | 600 W - peak transient power handling with 10/1000 µs waveform; validates protection against IEC 61000-4-5 Level 4 surges. |
| TJ max. | +150 °C - maximum junction temperature; enables operation in under-hood automotive or enclosed industrial enclosures. |
| RθJA | 100 °C/W - thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs PCB thermal pad design requirements. |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including HTOL, TC, and ESD testing; required for engine control, body electronics. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by band marking; anode is unmarked end. Meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when V > VBR. |
| Anode (unbanded end) | Reference node | Typically tied to system ground or low-impedance return path; completes clamping loop. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validates robustness against lightning-induced surges and inductive switching spikes in 24 V industrial systems. |
| AEC-Q101 qualified (HE3 suffix) | Confirms qualification for automotive applications including powertrain and ADAS sensor interfaces without additional qualification effort. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on protected ICs - e.g., keeps 3.3 V MCU I/O below absolute maximum rating during 1 kV surge. |
| MSL Level 1 (260 °C reflow) | Enables single-pass lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protecting gate drivers and feedback sensing lines from flyback voltage spikes generated by PWM-controlled 24 V solenoids and relays. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between MOSFET gate and source, limiting gate-source voltage to ≤14.4 V during turn-off transients. Use Value: Prevents gate oxide rupture in logic-level MOSFETs while maintaining fast switching integrity due to sub-nanosecond response time. |
Use Scenario: Safeguarding LIN bus transceivers and door module microcontrollers from load dump and jump-start surges in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Standoff clamping device on VCC rail and LIN data line, activated only during >9.44 V overvoltage events. Use Value: Maintains communication continuity during ISO 16750-2 load dump tests (up to 35 V, 400 ms) without latch-up or reset. |
| Consumer Appliance Power Supplies | Industrial Sensor Signal Conditioning |
Use Scenario: Suppressing ESD and switching noise on AC-DC converter input and output rails in washing machine and HVAC control boards. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side 5 V/3.3 V distribution net, placed adjacent to LDO inputs. Use Value: Eliminates need for redundant ceramic capacitors or ferrite beads by absorbing 30 kV HBM ESD pulses without degradation. |
Use Scenario: Shielding analog front-end amplifiers and ADC inputs from cable discharge events in factory-floor pressure and temperature sensors. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF) shunt protector on differential sensor outputs, grounded via shortest possible trace. Use Value: Preserves signal integrity (no added distortion) while limiting transient-induced offset errors to <1 LSB in 16-bit measurement systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5A-E3/52 | Same electrical specs, RoHS-compliant commercial grade (non-AEC-Q101); no automotive qualification. | Lacks AEC-Q101 test evidence; unsuitable for automotive production but acceptable for lab prototypes or consumer-grade designs. | Select when cost sensitivity outweighs automotive reliability requirements and full qualification documentation is not mandated. |
| SAC8.5 | Lower PPPM (400 W), higher VC (15.0 V), same VWM/VBR; SOD-123FL package (smaller footprint, lower thermal mass). | Reduced surge margin and less effective clamping; limited to low-energy transients in space-constrained portable devices. | Choose only for compact consumer electronics where board area is critical and surge exposure is limited to IEC 61000-4-2 ±8 kV contact discharge. |
Compared with SMBJ8.5A-E3/52, the SMBJ8.5AHE3_A/H adds AEC-Q101 validation for automotive use; versus SAC8.5, it delivers 50 % higher surge power handling and tighter clamping in a thermally superior SMB package - making it the preferred choice for industrial and automotive power-line protection.
Availability
SMBJ8.5AHE3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and consumer appliance power supplies requiring stable component supply with automotive-grade reliability and traceable sourcing.
Supply support for SMBJ8.5AHE3_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, and protection devices with emphasis on high-reliability, high-power, and automotive-qualified components.
The SMBJ series is engineered specifically for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes must be mitigated without compromising signal integrity or thermal performance.
FAQ
What is the clamping voltage of SMBJ8.5AHE3_A/H at its rated peak pulse current?
The SMBJ8.5AHE3_A/H has a maximum clamping voltage (VC) of 14.4 V at its specified peak pulse current (IPPM) of 41.7 A, measured using the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a 600 W transient event and is confirmed in the Electrical Characteristics table of Vishay document 88392. The SMBJ8.5AHE3_A/H maintains this clamping performance across its full operating temperature range.
Is SMBJ8.5AHE3_A/H suitable for automotive applications?
Yes, SMBJ8.5AHE3_A/H is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number, confirming compliance with automotive reliability standards including high-temperature operating life, temperature cycling, and ESD testing. It is approved for use in body electronics, lighting, and infotainment systems where transient protection must meet OEM requirements - unlike commercial-grade variants such as SMBJ8.5A-E3/52. The SMBJ8.5AHE3_A/H meets UL 497B for surge protector classification.
What does the "A/H" suffix in SMBJ8.5AHE3_A/H signify?
The "A/H" suffix in SMBJ8.5AHE3_A/H denotes the packaging configuration: "H" indicates a 7-inch diameter plastic tape-and-reel format with 750 units per reel, while "A" refers to the revision code per Vishay's internal documentation. This ordering code aligns with Vishay's preferred package code "H" in the Ordering Information table (page 3 of document 88392). The "HE3" portion confirms RoHS-compliant, AEC-Q101-qualified construction.
How does SMBJ8.5AHE3_A/H differ from bidirectional TVS diodes like SMBJ8.5CA?
The SMBJ8.5AHE3_A/H is unidirectional, meaning it conducts only in reverse bias above VBR and blocks forward current up to VF = 3.5 V at 50 A - ideal for DC power rail protection. In contrast, SMBJ8.5CA is bidirectional with symmetrical clamping in both polarities, suited for AC lines or data buses like RS-485. The SMBJ8.5AHE3_A/H offers lower leakage and tighter VBR tolerance than its bidirectional counterpart, but cannot protect AC-coupled signals without external biasing.
What is the thermal resistance and recommended PCB layout for SMBJ8.5AHE3_A/H?
The SMBJ8.5AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay document 88392. To achieve this rating, designers must use full-copper thermal pads connected to internal ground planes via ≥4 thermal vias per pad. Reduced pad area increases RθJA and risks thermal runaway during repetitive surges - a critical consideration for SMBJ8.5AHE3_A/H in high-duty-cycle industrial applications.
SMBJ8.5AHE3_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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 41.7A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ8.5AHE3_A/H FAQ
1.How can I place an order for SMBJ8.5AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ8.5AHE3_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 SMBJ8.5AHE3_A/H reliable?
The price and inventory of SMBJ8.5AHE3_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 SMBJ8.5AHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ8.5AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ8.5AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ8.5AHE3_A/H?
SMBJ8.5AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ8.5AHE3_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 SMBJ8.5AHE3_A/H?
For technical support, including SMBJ8.5AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ8.5AHE3_A/H requirements.
6.How does Aetrix verify that SMBJ8.5AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ8.5AHE3_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 SMBJ8.5AHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ8.5AHE3_A/H?
All SMBJ8.5AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ8.5AHE3_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 SMBJ8.5AHE3_A/H part is unused and in its original packaging.
Return procedure for SMBJ8.5AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ8.5AHE3_A/H 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 …
