My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMPC78ANHM3/I
- Part No.:
- SMPC78ANHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC78ANHM3/I.pdf
- Description:
- TVS DIODE 78VWM 126VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:4,465
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMPC78ANHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the SMPC (TO-277A) package, designed for high-energy surge protection of sensitive electronics. It features a 78.0 V stand-off voltage (VWM), 86.7–95.8 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), and clamps transients to ≤126 V at 11.9 A IPPM - ideal for automotive sensor signal line protection per AEC-Q101.
For engineers reviewing the SMPC78ANHM3/I datasheet, SMPC78ANHM3/I pinout, SMPC78ANHM3/I application, or SMPC78ANHM3/I equivalent, this device is selected for robust transient suppression in space-constrained automotive ECUs, industrial I/O modules, and telecom interface circuits where low-profile mounting, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical.
Technical Context
This TVS diode operates in avalanche mode with unidirectional polarity, using a silicon junction optimized for low incremental surge resistance and minimal clamping voltage overshoot under 10/1000 μs transients. Its thermal design supports 150 °C max junction temperature and achieves RθJA ≤ 100 °C/W on standard FR4 PCBs.
The SMPC78ANHM3/I is part of the AEC-Q101-qualified SMPCAN series, distinguished by halogen-free, RoHS-compliant construction, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and JESD 201 Class 2 whisker resistance - confirming suitability for automotive under-hood and body-control applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 78.0 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 86.7 V / 95.8 V at 1.0 mA - guaranteed avalanche initiation range for reliable turn-on margin |
| VC @ IPPM | ≤126 V at 11.9 A - clamping voltage limiting downstream circuit stress during 10/1000 μs surge |
| PPPM | 1500 W - peak transient energy absorption capability per standardized waveform |
| IR @ VWM | ≤1.0 μA - ultra-low leakage preserving signal integrity in high-impedance sensor interfaces |
| TJ max | +150 °C - enables operation in under-hood automotive environments without derating |
| Package | SMPC (TO-277A) - 3-terminal SMD outline with 1.1 mm typical height for automated placement |
Pinout & Package
SMPC78ANHM3/I uses the SMPC (TO-277A) package: a 3-terminal surface-mount case with cathode band marking, conforming to JEDEC TO-277A mechanical dimensions (4.80 × 3.70 × 1.10 mm). Terminals are matte tin-plated for solderability per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Primary anode connection | One of two parallel anode terminals; shares current path with Anode 2 to reduce effective surge resistance |
| Anode 2 | Secondary anode connection | Electrically tied to Anode 1 internally; dual-anode layout improves current sharing and thermal distribution |
| Cathode | Common cathode terminal | Marked with band; serves as the single reference node for unidirectional clamping to ground or supply rail |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables precise protection of DC-biased lines (e.g., CAN, LIN, sensor analog outputs) without forward conduction during normal operation |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock per stress test requirements |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without preconditioning - eliminates moisture sensitivity handling overhead |
| Dual-anode configuration | Reduces effective dynamic resistance during surge events, lowering clamping voltage and improving energy handling consistency |
| Halogen-free & RoHS | Meets global environmental compliance mandates without compromising surge performance or thermal reliability |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature (ECT) and manifold absolute pressure (MAP) sensors from load dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and ECU input to clamp surges before they reach precision ADC front-end stages. Use Value: Maintains signal fidelity with ≤1.0 μA leakage at 78 V, while limiting transient overvoltage to ≤126 V - preventing ADC saturation and system reset. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers against field-wiring induced surges from solenoid valve switching. IC Role / Device Role / Timing Role: Standoff-rated TVS connected across input terminals to shunt transients to common ground before reaching optocoupler input stage. Use Value: Withstands 1500 W pulses and operates up to +150 °C ambient, ensuring long-term reliability in factory-floor control cabinets without derating. |
| Telecom Line Card Surge Protection | Motor Drive Feedback Signal Protection |
Use Scenario: Shielding RS-485 transceiver data lines in base station remote radio units exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectionally configured pair (using two unidirectional devices) to protect differential bus lines against common-mode transients. Use Value: Fast <1 ns response and low clamping voltage preserve signal edge integrity and minimize bit error rate during surge events. |
Use Scenario: Securing resolver or encoder feedback signals in servo motor drives subjected to high dv/dt noise from adjacent IGBT switching. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector entry point to suppress high-frequency ringing without attenuating position signal bandwidth. Use Value: Junction capacitance not specified but minimized via SMPC geometry; 1.1 mm profile allows placement directly at board edge without interfering with routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ78A-E3/5A | DO-214AC (SMA) package; 78 V VWM; 1500 W PPPM; higher RθJA (~150 °C/W); no AEC-Q101 qualification | General industrial/commercial use only; unsuitable for automotive under-hood deployment | Select when cost sensitivity outweighs automotive qualification and thermal performance requirements |
| SMCJ78A-QH | DO-214AB (SMC) package; 78 V VWM; 1500 W PPPM; AEC-Q101 qualified; 2.4 mm height vs. SMPC78ANHM3/I's 1.1 mm | Acceptable for chassis-mounted automotive modules where board height is less constrained | Choose when existing SMC footprint is fixed and lower profile is not required |
Compared with SMAJ78A-E3/5A and SMCJ78A-QH, the SMPC78ANHM3/I delivers identical electrical protection performance in a 54 % lower profile package with validated automotive qualification - making it optimal for next-generation compact ECUs and high-density industrial controllers where vertical space and AEC compliance are non-negotiable.
Availability
SMPC78ANHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC input conditioning, and telecom line card surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMPC78ANHM3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMPC series was developed to address demand for ultra-low-profile, AEC-Q101-qualified TVS diodes in automotive and industrial electronics - combining high surge capability with surface-mount manufacturability and stringent environmental compliance.
FAQ
What is the polarity configuration of the SMPC78ANHM3/I?
The SMPC78ANHM3/I is a unidirectional transient voltage suppressor. Its cathode is marked by a band on the package body, and it conducts only during reverse-biased overvoltage events - protecting DC-biased lines such as automotive sensor outputs or 24 V industrial inputs. This polarity ensures no forward conduction during normal operation, preserving signal integrity and minimizing leakage current in the SMPC78ANHM3/I.
Does the SMPC78ANHM3/I meet AEC-Q101 requirements?
Yes, the SMPC78ANHM3/I is explicitly AEC-Q101 qualified, as confirmed in Vishay document 89116 (Revision: 17-Sep-2021), which states "AEC-Q101 qualified available - Automotive ordering code: base P/NHM3" and lists SMPC78AN among SMPC22AN to SMPC85AN as qualified variants. This certification covers stress tests including temperature cycling, humidity bias, and mechanical shock - validating the SMPC78ANHM3/I for automotive under-hood and body-control applications.
What does the "/I" suffix indicate in SMPC78ANHM3/I?
The "/I" suffix in SMPC78ANHM3/I denotes the preferred packaging option: 13-inch diameter plastic tape and reel, containing 6500 units per reel. This format is optimized for high-volume automated SMT assembly lines. The base part SMPC78ANHM3 is identical electrically and mechanically; only the delivery mode differs - distinguishing it from the "/H" variant (7-inch reel, 1500 units). The SMPC78ANHM3/I thus ensures consistent feeding and placement efficiency in production environments.
How does the dual-anode structure of the SMPC78ANHM3/I improve surge performance?
The SMPC78ANHM3/I features two anode terminals (Anode 1 and Anode 2) electrically paralleled internally. This dual-anode layout reduces effective surge resistance by distributing transient current across two bond wires and die regions, lowering clamping voltage overshoot and improving thermal dissipation uniformity. As a result, the SMPC78ANHM3/I maintains tighter VC consistency at 11.9 A IPPM and enhances reliability under repetitive surge stress - a key advantage over single-anode TVS packages.
Is the SMPC78ANHM3/I compatible with lead-free reflow processes?
Yes, the SMPC78ANHM3/I meets MSL Level 1 per J-STD-020 and supports lead-free reflow with a maximum peak temperature of 260 °C. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 for solderability, and its molding compound satisfies UL 94 V-0 flammability. No floor life limitation or baking preconditioning is required - enabling direct placement into standard high-volume SMT lines without process modification for the SMPC78ANHM3/I.
SMPC78ANHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- TO-277, 3-PowerDFN
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 78V
- Voltage - Breakdown (Min):
- 86.7V
- Voltage - Clamping (Max) @ Ipp:
- 126V
- Current - Peak Pulse (10/1000µs):
- 11.9A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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:
- TO-277A (SMPC)
SMPC78ANHM3/I FAQ
1.How can I place an order for SMPC78ANHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC78ANHM3/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 SMPC78ANHM3/I reliable?
The price and inventory of SMPC78ANHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC78ANHM3/I is usually 5 days.
3.What payment methods are accepted for SMPC78ANHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC78ANHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC78ANHM3/I?
SMPC78ANHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC78ANHM3/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 SMPC78ANHM3/I?
For technical support, including SMPC78ANHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC78ANHM3/I requirements.
6.How does Aetrix verify that SMPC78ANHM3/I is sourced from the original manufacturer or authorized distributors?
All SMPC78ANHM3/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 SMPC78ANHM3/I meets industry standards.
7.What is the process for return or replacement of SMPC78ANHM3/I?
All SMPC78ANHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMPC78ANHM3/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 SMPC78ANHM3/I part is unused and in its original packaging.
Return procedure for SMPC78ANHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC78ANHM3/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 …
