My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ170AHM3_A/I
- Part No.:
- SMBJ170AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170AHM3_A/I.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,222
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ170AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 170 V stand-off voltage (VWM), 189–209 V breakdown voltage (VBR) at 1 mA, 275 V maximum clamping voltage (VC) at 2.2 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives, telecom power supplies, and automotive body control modules.
For engineers reviewing the SMBJ170AHM3_A/I datasheet, SMBJ170AHM3_A/I pinout, SMBJ170AHM3_A/I application, or SMBJ170AHM3_A/I equivalent, this page delivers verified electrical parameters, thermal derating behavior, AEC-Q101 qualification status, halogen-free RoHS compliance, and real-world clamping performance under surge conditions - critical for ESD and lightning-induced transient design validation.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, leveraging glass-passivated junction technology to achieve sub-nanosecond response time and low incremental surge resistance. Its 100 °C/W junction-to-ambient thermal resistance (RθJA) and 20 °C/W junction-to-lead (RθJL) define PCB pad layout requirements for sustained 5.0 W power dissipation at TA = 50 °C.
The device complies with ANSI/IEEE C62.35 surge standards and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification - validated for automotive-grade reliability in under-hood and chassis-mounted electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 170 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA; sets upper limit for protected circuit DC bias. |
| VBR (Breakdown Voltage) | 189–209 V at IT = 1 mA - guaranteed avalanche onset range; ensures predictable turn-on during transients above nominal rail. |
| VC (Clamping Voltage) | 275 V at IPPM = 2.2 A (10/1000 µs) - peak voltage seen by downstream ICs during surge; defines worst-case stress on protected load. |
| PPPM (Peak Pulse Power) | 600 W - maximum non-repetitive surge energy absorption capability; enables protection against IEC 61000-4-5 Level 4 surges. |
| TJ max. | +150 °C - maximum junction temperature; supports operation in engine bay or industrial enclosures without active cooling. |
| IFSM (Surge Current) | 100 A (8.3 ms half-sine) - unidirectional forward surge rating; validates robustness against inrush or fault currents in DC power paths. |
| Package | SMB (DO-214AA) - standardized 2-pin surface-mount outline with 5.0 mm × 5.0 mm copper pad requirement; compatible with automated SMT placement. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward conduction mode | Connected to lower-potential side of protected line (e.g., GND or return path); enables clamping when cathode-side voltage exceeds VBR. |
| Cathode | Current exit terminal; marked with band | Connected to higher-potential side (e.g., +12 V rail); avalanche conduction occurs when cathode-to-anode voltage exceeds VBR, shunting surge to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 4 kV surge tests without cascaded staging. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including BCM, ADAS power domains, and infotainment supply rails per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements for green manufacturing. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow profile (peak 260 °C) without baking preconditioning. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in MOSFETs and ICs. |
Applications
| Industrial Motor Drives | Telecom DC Power Supplies |
|---|---|
|
Use Scenario: Protection of gate drivers and current-sense amplifiers against inductive kickback from IGBTs and MOSFETs during PWM switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed between high-side driver output and ground, clamping negative-going transients below -0.7 V and positive surges up to 275 V. Use Value: Prevents false triggering and latch-up in isolated gate drivers (e.g., Si823x) while maintaining <1 ns response to 500 V/µs edges. |
Use Scenario: Input-stage surge suppression on +48 V telecom rectifier outputs feeding PoE injectors and baseband processors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input rail upstream of DC-DC converters; coordinated with MOVs for multi-level protection. Use Value: Limits transient voltage to ≤275 V during 10/1000 µs surges, preserving 50 V-rated input capacitors and enabling 95 % efficiency at full load. |
| Automotive Body Control Modules | Consumer Appliance Mainboard Power Rails |
|
Use Scenario: CAN-FD and LIN bus power rail protection in BCMs exposed to load dump and jump-start events. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V battery feed, absorbing 600 W pulses without degradation across -40 °C to +125 °C ambient. Use Value: Maintains VWM stability over temperature (TCVBR = 0.108 %/°C), ensuring no false triggering during cold cranking or hot soak. |
Use Scenario: Overvoltage guard on 24 V auxiliary supply feeding MCU, display backlight, and relay drivers in smart washing machines. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to system ground, placed immediately after bridge rectifier output. Use Value: Survives 100,000+ surge cycles per IEC 61000-4-5, eliminating field failures due to compressor-induced transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170AHE3_A/I | Same electrical specs, but RoHS-compliant commercial grade (not halogen-free or AEC-Q101 qualified). | Lacks automotive qualification and halogen-free certification; suitable only for industrial/commercial end-equipment. | Select when AEC-Q101 and halogen-free compliance are not required; lower cost alternative for non-automotive BOMs. |
| SMCJ170A-HM3_A/I | Same VWM/VBR/VC ratings but in larger SMC (DO-214AB) package; 1500 W PPPM rating and 3.5 A IPPM. | Higher power handling enables longer surge duration immunity; requires larger PCB footprint and different pad layout. | Choose when system-level testing demands >600 W surge margin or when legacy SMC footprint is fixed in production. |
Compared with SMBJ170AHM3_A/I, the HE3 variant trades automotive qualification for cost savings in non-automotive systems, while the SMCJ170A-HM3_A/I offers 2.5× higher surge power at the expense of board space - making SMBJ170AHM3_A/I optimal for space-constrained AEC-Q101 designs requiring exact 600 W capability.
Availability
SMBJ170AHM3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, telecom DC power supplies, and automotive body control modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBJ170AHM3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where consistent clamping, thermal stability, and qualification compliance are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ170AHM3_A/I at its rated peak pulse current?
The SMBJ170AHM3_A/I has a maximum clamping voltage (VC) of 275 V at a peak pulse current (IPPM) of 2.2 A with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ170AHM3_A/I maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMBJ170AHM3_A/I qualified for automotive applications?
Yes, SMBJ170AHM3_A/I is AEC-Q101 qualified, as confirmed by the HM3 suffix in its ordering code. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for under-hood and chassis-mounted automotive electronics such as body control modules and ADAS power domains.
What does the "HM3" suffix indicate for SMBJ170AHM3_A/I?
The "HM3" suffix denotes that SMBJ170AHM3_A/I is halogen-free, RoHS-compliant, and AEC-Q101 qualified. It distinguishes this variant from commercial-grade versions (e.g., E3 or M3) and confirms compliance with automotive material restrictions and reliability standards. The "A/I" further specifies packaging in 13-inch tape-and-reel format with 3200 units per reel.
How does SMBJ170AHM3_A/I compare to bidirectional TVS diodes like SMBJ170CA?
SMBJ170AHM3_A/I is unidirectional and intended for DC rail protection where polarity is fixed, offering lower leakage and tighter VBR tolerance than bidirectional counterparts. In contrast, SMBJ170CA provides symmetrical clamping for AC or floating signal lines but exhibits higher reverse leakage and reduced precision in breakdown threshold. SMBJ170AHM3_A/I is not interchangeable with SMBJ170CA without circuit redesign.
What PCB pad layout is required for optimal thermal performance of SMBJ170AHM3_A/I?
SMBJ170AHM3_A/I requires minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve its specified 100 °C/W junction-to-ambient thermal resistance. Reducing pad area increases RθJA, derating both power dissipation and surge capability. The device's RθJL of 20 °C/W also supports localized thermal relief via internal leadframe conduction - critical for sustained 5.0 W operation at TA = 50 °C.
SMBJ170AHM3_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):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 2.2A
- Power - Peak Pulse:
- 600W
- 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)
SMBJ170AHM3_A/I FAQ
1.How can I place an order for SMBJ170AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170AHM3_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 SMBJ170AHM3_A/I reliable?
The price and inventory of SMBJ170AHM3_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 SMBJ170AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ170AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170AHM3_A/I?
SMBJ170AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170AHM3_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 SMBJ170AHM3_A/I?
For technical support, including SMBJ170AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170AHM3_A/I requirements.
6.How does Aetrix verify that SMBJ170AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ170AHM3_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 SMBJ170AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ170AHM3_A/I?
All SMBJ170AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170AHM3_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 SMBJ170AHM3_A/I part is unused and in its original packaging.
Return procedure for SMBJ170AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170AHM3_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 …
