My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ170AHM3/H
- Part No.:
- SMBJ170AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ170AHM3/H.pdf
- Description:
- TVS DIODE 170VWM 275VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,106
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ170AHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on power 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, and 600 W peak pulse power rating with a 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom infrastructure.
For engineers reviewing the SMBJ170AHM3/H datasheet, SMBJ170AHM3/H pinout, SMBJ170AHM3/H application, or SMBJ170AHM3/H equivalent, this page delivers verified electrical parameters, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), and real-world clamping behavior under surge conditions - critical for ESD and lightning transient design validation.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its specified VBR range (189–209 V). Its low incremental surge resistance ensures stable clamping during repetitive 10/1000 µs transients up to 600 W, with <1 ns response time enabling protection of fast-switching power stages.
Designed for surface-mount assembly on standard PCB copper pads (0.2" × 0.2"), it supports automated placement and meets J-STD-020 MSL Level 1 (peak reflow ≤260 °C). The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification - making it suitable for automotive-grade power rail protection where reliability under thermal cycling and humidity is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin for 24 V–48 V industrial bus lines. |
| VBR @ IT = 1 mA | 189–209 V - Measured breakdown voltage range; ensures consistent turn-on threshold across production lots for predictable overvoltage protection. |
| VC @ IPPM = 2.2 A | 275 V - Clamped voltage during 10/1000 µs surge; limits downstream component stress to ≤275 V even under full-rated transient energy. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform at 0.01% duty cycle; enables robust protection against IEC 61000-4-5 Level 4 surges. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient for sustained surge duty. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports fault-current limiting in DC input stage protection circuits. |
| TJ max. | +150 °C - Maximum junction temperature; allows operation in high-temperature environments such as enclosed power converters or under-hood automotive modules. |
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. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail in unidirectional clamp configuration; carries surge current during reverse transient events. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 170 V DC bus); initiates avalanche conduction when voltage exceeds VBR, shunting surge to ground via anode path. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against high-energy transients per IEC 61000-4-5 without external series impedance or staged clamping. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive power electronics applications including engine control units and ADAS power rails requiring extended temperature and life-cycle reliability. |
| Halogen-free, RoHS-compliant (HM3) | Meets global environmental compliance mandates and eliminates corrosive halogen emissions during PCB reflow or end-of-life incineration. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and direct placement into reflow ovens without baking, reducing manufacturing overhead and handling risk. |
| Low clamping ratio (VC/VWM ≈ 1.62) | Minimizes overvoltage overshoot during clamping, preserving margin for downstream 300 V-rated MOSFETs and gate drivers. |
Applications
| Industrial Power Supply Protection | Telecom DC Feeder Line Protection |
|---|---|
Use Scenario: Protecting 170 V DC output rails in programmable logic controller (PLC) power modules from inductive switching spikes and load dump events. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between output rail and chassis ground, activated within nanoseconds upon overvoltage detection. Use Value: Limits transient voltage to ≤275 V, preventing damage to downstream 300 V-rated DC-DC controllers and isolated gate drivers. |
Use Scenario: Safeguarding -48 V telecom rectifier outputs and battery backup lines against lightning-induced surges on central office feeder cables. IC Role / Device Role / Timing Role: Standoff-clamp device mounted directly at board edge connector, absorbing multi-kA surge currents before reaching sensitive line cards. Use Value: Withstands 600 W pulses while maintaining VC ≤275 V, ensuring uninterrupted service during Category A/B surge events per GR-1089-CORE. |
| Automotive Body Control Module (BCM) | Renewable Energy Inverter DC Link |
Use Scenario: Protecting 12 V–24 V auxiliary power domains in BCMs from load dump transients up to ISO 7637-2 Pulse 5a (110 V, 100 ms). IC Role / Device Role / Timing Role: Secondary clamping device downstream of primary TVS array, handling residual overshoot after front-end suppression. Use Value: AEC-Q101 qualification and +150 °C TJ max ensure operational integrity in under-hood environments with minimal derating. |
Use Scenario: Clamping voltage spikes on 170 V DC link capacitors in solar microinverters during rapid PV string disconnection or grid fault recovery. IC Role / Device Role / Timing Role: Parallel-connected TVS across DC bus, activated during dV/dt >500 V/µs events to prevent IGBT overvoltage failure. Use Value: Low RθJA (100 °C/W) and 100 A IFSM support repeated surge handling without thermal runaway in compact heatsinkless designs. |
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/H | Same VWM, VBR, VC, and PPPM; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Approved for commercial/industrial use only; unsuitable for automotive applications requiring halogen-free and AEC-Q101 compliance. | Select SMBJ170AHE3/H only if halogen content and automotive qualification are not required, and cost optimization is prioritized. |
| SMBJ170CAHM3/H | Bidirectional variant with identical VWM and clamping specs; symmetrical breakdown in both polarities; no cathode marking. | Used where AC-coupled or bipolar signal lines require protection (e.g., RS-485, CAN FD physical layer), not unidirectional DC rails. | Choose SMBJ170CAHM3/H only for bidirectional surge paths; SMBJ170AHM3/H remains optimal for DC power line clamping with polarity-defined grounding. |
Compared with SMBJ170AHE3/H and SMBJ170CAHM3/H, the SMBJ170AHM3/H uniquely combines halogen-free construction, AEC-Q101 qualification, and unidirectional polarity - making it the sole choice for automotive-grade 170 V DC rail protection where regulatory compliance and directional clamping are mandatory.
Availability
SMBJ170AHM3/H is available at Aetrix Electronics and suitable for industrial power supplies, telecom DC feeders, automotive body control modules, and renewable energy inverters requiring stable component supply with guaranteed long-term sourcing.
Supply support for SMBJ170AHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific performance.
The SMBJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure immunity under surge stress is non-negotiable.
FAQ
What is the clamping voltage of SMBJ170AHM3/H at its rated peak pulse current?
The SMBJ170AHM3/H 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 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ170AHM3/H maintains this clamping performance consistently across its operating temperature range, supporting robust overvoltage protection in high-reliability applications.
Is SMBJ170AHM3/H suitable for automotive applications?
Yes, SMBJ170AHM3/H is AEC-Q101 qualified and constructed with halogen-free, RoHS-compliant materials (HM3 suffix), making it suitable for automotive power electronics including body control modules, infotainment power rails, and ADAS subsystems. Its +150 °C maximum junction temperature and validated performance under thermal cycling and humidity testing confirm suitability for under-hood and cabin-mounted deployments where SMBJ170AHM3/H must operate reliably over vehicle lifetime.
How does the HM3 suffix differ from the HE3 suffix in SMBJ170A variants?
The HM3 suffix on SMBJ170AHM3/H indicates halogen-free, RoHS-compliant construction plus AEC-Q101 qualification, whereas the HE3 suffix denotes RoHS compliance only, without halogen-free assurance or automotive qualification. Both share identical electrical specifications, but SMBJ170AHM3/H meets stricter environmental and reliability requirements mandated for Tier 1 automotive suppliers. For non-automotive industrial use, SMBJ170AHM3/H remains fully compatible but incurs higher compliance assurance.
What is the thermal resistance of SMBJ170AHM3/H, and how does it affect layout design?
The SMBJ170AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes standard FR-4 PCB layout; increasing pad area or adding internal copper planes reduces RθJA and improves surge endurance. Designers must apply derating curves from Figure 2 of the datasheet when ambient temperature exceeds 25 °C to ensure SMBJ170AHM3/H stays within its +150 °C TJ limit during repetitive surge events.
Can SMBJ170AHM3/H be used in bidirectional signal line protection?
No - SMBJ170AHM3/H is a unidirectional TVS diode, with polarity defined by its cathode band marking; it conducts only in reverse bias and blocks forward current beyond ~3.5 V. For bidirectional protection (e.g., RS-485, CAN, or AC-coupled analog lines), the bidirectional variant SMBJ170CAHM3/H must be used instead. Using SMBJ170AHM3/H on bidirectional paths risks forward conduction, unintended current flow, and failure to suppress positive-going transients - so SMBJ170AHM3/H is strictly limited to unidirectional DC rail clamping.
SMBJ170AHM3/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:
- Discontinued at Digi-Key
- 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/H FAQ
1.How can I place an order for SMBJ170AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ170AHM3/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 SMBJ170AHM3/H reliable?
The price and inventory of SMBJ170AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ170AHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ170AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ170AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ170AHM3/H?
SMBJ170AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ170AHM3/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 SMBJ170AHM3/H?
For technical support, including SMBJ170AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ170AHM3/H requirements.
6.How does Aetrix verify that SMBJ170AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ170AHM3/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 SMBJ170AHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ170AHM3/H?
All SMBJ170AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ170AHM3/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 SMBJ170AHM3/H part is unused and in its original packaging.
Return procedure for SMBJ170AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ170AHM3/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 …
