My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB8J9.0CAHE3/52
- Part No.:
- SMB8J9.0CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J9.0CAHE3/52.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,389
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB8J9.0CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 9.0 V stand-off voltage (VWM), 15.4 V maximum clamping voltage (VC) at 20 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J9.0CAHE3/52 datasheet, SMB8J9.0CAHE3/52 pinout, SMB8J9.0CAHE3/52 application, or SMB8J9.0CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM = 1.71), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to transients induced by inductive switching or ESD events. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, while the bidirectional configuration enables symmetric clamping across both polarities without external polarity management.
Designed per ANSI/IEEE C62.35 standards, SMB8J9.0CAHE3/52 delivers repeatable clamping performance under repetitive surge stress when mounted per recommended pad layout. Its 150 °C max junction temperature and 72 °C/W junction-to-ambient thermal resistance support operation in under-hood automotive environments and thermally constrained industrial PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe signal swing margin in protected circuits. |
| VBR min/max | 10.0 V / 11.1 V at 1.0 mA - Confirmed breakdown threshold range ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 15.4 V at 20 A - Clamping voltage limits downstream IC stress during 10/1000 μs surge; enables robust protection of 12 V rail interfaces. |
| PPPM | 800 W - Peak pulse power handling capacity with 10/1000 μs waveform; supports IEC 61000-4-5 Level 3 (1 kV/2 Ω) compliance. |
| ID @ VWM | 1.0 μA - Ultra-low leakage preserves signal integrity and battery life in always-on sensor nodes. |
| TJ max | +150 °C - Enables deployment in automotive engine control units and industrial motor drives without derating. |
| MSL Level | Level 1 (260 °C peak reflow) - Compatible with standard lead-free SMT assembly processes without dry-pack requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking; case dimensions 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Bidirectional conduction allows identical clamping for positive and negative surges; no orientation required during placement. |
| Case (cathode band absent) | Thermal and mechanical interface | Exposed metal slug provides primary heat dissipation path; requires 5.0 mm × 5.0 mm copper pad per terminal per datasheet fig. 2. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics per stress test requirements. |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes voltage overshoot during surge events, protecting 12 V-rated ICs such as CAN transceivers and microcontrollers. |
| MSL Level 1 rating | Eliminates pre-bake requirements and supports direct placement into high-volume SMT lines using standard reflow profiles. |
| RoHS-compliant & halogen-free option | HE3 suffix denotes RoHS-compliant construction; HM3 suffix adds halogen-free molding compound for stringent environmental compliance. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN bus and analog sensor outputs (e.g., pressure, temperature) in engine compartments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point to clamp surges before reaching ASIC or MCU input pins. Use Value: 15.4 V clamping voltage ensures sub-20 V stress on 12 V tolerant inputs; AEC-Q101 qualification guarantees reliability over 15-year vehicle lifetime. | Use Scenario: Safeguarding RS-485/RS-232 communication lines and digital I/O ports in PLC modules subjected to lightning-induced surges and EFT bursts. IC Role / Device Role / Timing Role: Bidirectional voltage clamp on differential pairs or single-ended lines, absorbing up to 800 W transient energy without latch-up. Use Value: Symmetric clamping eliminates need for dual unidirectional devices; 1.0 μA leakage avoids signal degradation in high-impedance measurement circuits. |
| Consumer Power Adapter Input | Telecom DC Power Feed |
Use Scenario: Secondary-side surge suppression on 5–12 V DC outputs of wall adapters and USB PD chargers against capacitive coupling and fast transients. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF at 0 V) shunt protector placed adjacent to connector to minimize trace inductance effects. Use Value: 9.0 V VWM aligns with common 12 V nominal rails; SMB footprint enables compact layout without sacrificing 800 W surge rating. | Use Scenario: Protecting -48 V DC power feeds in telecom base station line cards from accidental AC mains coupling and lightning surges. IC Role / Device Role / Timing Role: Bidirectional clamp referenced to system ground, installed at power entry to divert surge current away from DC/DC converters and PMICs. Use Value: 150 °C TJ max supports operation in sealed, fanless enclosures; 72 °C/W RθJA enables thermal design with minimal copper area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J9.0CAHM3/52 | Halogen-free molding compound; otherwise identical electrical specs and AEC-Q101 qualification. | Required where halogen-free compliance is mandated by OEM or regional environmental regulations (e.g., EU ELV Directive). | Select HM3 variant when full material declaration and halogen-free certification are contractually required. |
| SMBJ9.0CAHE3/52 | Unchanged VWM (9.0 V) and VC (15.4 V), but lower PPPM (600 W vs. 800 W); same SMB package and AEC-Q101 rating. | Suitable for lower-energy threat environments (e.g., IEC 61000-4-4 Level 2) where 800 W headroom is not needed. | Choose SMBJ9.0CAHE3/52 only if system-level surge testing confirms 600 W rating suffices and cost optimization is prioritized. |
Compared with SMB8J9.0CAHE3/52, the HM3 variant adds halogen-free compliance without altering protection performance, while the SMBJ9.0CAHE3/52 offers cost reduction at the expense of 25% lower surge power handling - requiring explicit validation against end-equipment test standards.
Availability
SMB8J9.0CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, and telecom DC feed applications requiring stable component supply, AEC-Q101 qualification, and consistent 800 W surge capability.
Supply support for SMB8J9.0CAHE3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power density, and automotive-grade qualification.
The SMB8Jx.xCA series belongs to Vishay's TRANSZORB® high-power TVS family, engineered specifically for AEC-Q101-compliant surge protection in harsh-environment automotive and industrial systems where bidirectional clamping and thermal robustness are critical.
FAQ
What is the clamping voltage of SMB8J9.0CAHE3/52 at its rated peak pulse current?
The SMB8J9.0CAHE3/52 has a maximum clamping voltage (VC) of 15.4 V at 20 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88422, page 3. The low clamping ratio (VC/VWM = 1.71) ensures effective protection of 12 V rail components without excessive voltage overshoot.
Is SMB8J9.0CAHE3/52 suitable for automotive applications?
Yes, SMB8J9.0CAHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS-compliant, AEC-Q101-qualified construction. It meets requirements for engine control, body electronics, and ADAS sensor protection, including thermal cycling, humidity bias, and surge endurance tests defined in the AEC-Q101 standard.
What does the "HE3" suffix mean in SMB8J9.0CAHE3/52?
The "HE3" suffix in SMB8J9.0CAHE3/52 indicates RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering nomenclature (Document 88422, page 4), "HE3" denotes the commercial-grade, RoHS-compliant, and AEC-Q101-qualified version supplied in 7" tape-and-reel (package code 52). It is distinct from "HM3", which adds halogen-free molding compound.
How does SMB8J9.0CAHE3/52 differ from unidirectional SMB10J9.0AHE3/52?
SMB8J9.0CAHE3/52 is bidirectional with 800 W PPPM and 20 A IPPM, while SMB10J9.0AHE3/52 is unidirectional with 1000 W PPPM and 64.9 A IPPM. Both share 9.0 V VWM and 15.4 V VC, but the unidirectional version supports higher surge current and is used where polarity is controlled (e.g., DC power rails), whereas SMB8J9.0CAHE3/52 protects AC-coupled or polarity-agnostic lines like data buses.
What is the thermal resistance of SMB8J9.0CAHE3/52, and how does it affect PCB layout?
SMB8J9.0CAHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per datasheet page 5. To maintain TJ ≤ 150 °C under 800 W surge, designers must ensure adequate copper area and avoid thermal bottlenecks - undersized pads will cause premature thermal failure during repetitive surges.
SMB8J9.0CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 51.9A
- Power - Peak Pulse:
- 800W
- 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 (SMB)
SMB8J9.0CAHE3/52 FAQ
1.How can I place an order for SMB8J9.0CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J9.0CAHE3/52 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 SMB8J9.0CAHE3/52 reliable?
The price and inventory of SMB8J9.0CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J9.0CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J9.0CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J9.0CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J9.0CAHE3/52?
SMB8J9.0CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J9.0CAHE3/52 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 SMB8J9.0CAHE3/52?
For technical support, including SMB8J9.0CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J9.0CAHE3/52 requirements.
6.How does Aetrix verify that SMB8J9.0CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J9.0CAHE3/52 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 SMB8J9.0CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J9.0CAHE3/52?
All SMB8J9.0CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J9.0CAHE3/52, 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 SMB8J9.0CAHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J9.0CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J9.0CAHE3/52 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
