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Vishay General Semiconductor - Diodes Division SMPC45ANHM3/H
- Part No.:
- SMPC45ANHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC45ANHM3/H.pdf
- Description:
- TVS DIODE 45VWM 72.7VC TO277A
- Quantity:
- Payment:
- Shipping:
Inventory:7,281
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Product details
Overview
SMPC45ANHM3/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in the eSMP® SMPC (TO-277A) package, designed for automotive-grade overvoltage protection. It features a 45.0 V stand-off voltage (VWM), 50.0–55.3 V breakdown voltage (VBR), 1500 W peak pulse power (PPPM), 72.7 V clamping voltage at 20.6 A IPPM, and AEC-Q101 qualification for under-hood and ADAS sensor line protection.
For engineers reviewing the SMPC45ANHM3/H datasheet, SMPC45ANHM3/H pinout, SMPC45ANHM3/H application, or SMPC45ANHM3/H equivalent, this device is selected for high-reliability transient suppression in automotive power rails, CAN/LIN bus interfaces, and MOSFET gate protection where low-profile mounting, fast response (<1 ns), and MSL Level 1 reflow compatibility are required.
Technical Context
This TVS diode operates in avalanche mode to clamp transients induced by inductive load switching or ESD events. Its unidirectional polarity enables integration into DC-biased lines without reverse conduction, and its low incremental surge resistance ensures minimal voltage overshoot during 10/1000 μs surges.
The SMPC45ANHM3/H uses a dual-anode/dual-cathode configuration in the SMPC (TO-277A) package - with cathode denoted by band - enabling symmetrical thermal dissipation and optimized PCB layout for high-current surge paths. It is rated for TJ = -55 °C to +150 °C and meets JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45.0 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 μA; sets minimum system rail margin for reliable standby operation. |
| VBR min/max | 50.0 V / 55.3 V at 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on across temperature and production lot. |
| VC @ IPPM | 72.7 V at 20.6 A - Clamped voltage during 10/1000 μs surge; defines maximum stress on downstream ICs like microcontrollers or transceivers. |
| PPPM | 1500 W - Peak pulse power handling per JEDEC standard; supports IEC 61000-4-5 Level 4 (4 kV) surge compliance with appropriate layout. |
| RθJA | 85–100 °C/W - Junction-to-ambient thermal resistance on FR4 with 2 oz copper; determines derating needed above 25 °C ambient. |
| Polarity | Unidirectional - Blocks reverse current only; requires correct orientation relative to DC bias; not suitable for AC or bidirectional signal lines without external circuitry. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control, body electronics, and ADAS sensors per stress test requirements. |
Pinout & Package
Package: SMPC (TO-277A), surface-mount, halogen-free, RoHS-compliant, 1.1 mm typical height, MSL Level 1 (260 °C peak reflow). Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 & Anode 2 | Common anode connection | Internally tied anodes provide low-inductance parallel path for surge current return; must connect to protected circuit's ground or low-impedance reference plane. |
| Cathode | Transient clamping node | Connected to protected line (e.g., 12 V rail or CAN_H); conducts avalanche current when voltage exceeds VBR to clamp transients. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMPC package | 1.1 mm height enables use in space-constrained automotive modules and stacked PCB assemblies without mechanical interference. |
| AEC-Q101 qualification | Validated for automotive temperature cycling, humidity, and mechanical shock; supports PPAP documentation for Tier 1 OEM programs. |
| Fast response time | <1 ns turn-on ensures clamping occurs before sensitive ICs experience damaging overvoltage - critical for protecting 3.3 V/5 V logic inputs. |
| Low incremental surge resistance | Minimizes dynamic impedance during surge, reducing VC overshoot and improving energy absorption efficiency in high-di/dt events. |
| Matte tin-plated leads | Solderable per J-STD-002 and JESD22-B102; compatible with lead-free reflow profiles and eliminates intermetallic growth concerns in long-life deployments. |
Applications
| Automotive Power Rail Protection | CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator transients. IC Role / Device Role / Timing Role: Primary clamping element placed between power input and bulk capacitor; absorbs >95 % of surge energy before reaching downstream regulators. Use Value: Withstands 1500 W peak pulses and maintains clamping at ≤72.7 V, preventing brownout or latch-up in ASIL-B microcontrollers. |
Use Scenario: Shielding high-speed CAN_H/CAN_L differential pairs from ESD (IEC 61000-4-2) and coupled transients in vehicle networks. IC Role / Device Role / Timing Role: Unidirectional TVS placed on each CAN line referenced to chassis ground; suppresses common-mode surges without distorting signal integrity. Use Value: 72.7 V clamping preserves CAN transceiver common-mode range while low capacitance (<100 pF) avoids data rate degradation at 1 Mbps. |
| MOSFET Gate Protection | ADAS Sensor Interface Protection |
Use Scenario: Safeguarding N-channel high-side switch gates from inductive kickback during solenoid or relay coil de-energization. IC Role / Device Role / Timing Role: Connected between gate and source; clamps negative-going spikes below -0.7 V and positive overshoot above VGS(max). Use Value: Fast <1 ns response prevents gate oxide rupture; 45 V VWM aligns with typical 36 V max gate drive rails in 24 V systems. |
Use Scenario: Protecting radar or camera sensor analog outputs (e.g., LVDS, analog video) from ESD and cable discharge events in front-end modules. IC Role / Device Role / Timing Role: Placed at connector interface; shunts transient energy to ground before entering precision amplifier or ADC front-end. Use Value: AEC-Q101 qualification ensures reliability in harsh under-hood environments; low leakage (<1.0 μA at 45 V) avoids signal offset drift in µV-level sensor signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45A-H | DO-214AC package; 45 V VWM; 1500 W PPPM; no AEC-Q101 qualification; RθJA ≈ 125 °C/W. | Industrial/commercial grade only; unsuitable for automotive PPAP; higher thermal resistance limits power density in compact layouts. | Select SMAJ45A-H only for cost-sensitive non-automotive designs where AEC-Q101 is not mandated and board space allows larger footprint. |
| SMCJ45A-H | DO-214AB package; same VWM/PPPM; AEC-Q101 qualified; 2.3 mm height vs. SMPC45ANHM3/H's 1.1 mm. | Compatible automotive use but 2× taller; may interfere with shield cans or adjacent components in ultra-thin modules. | Choose SMCJ45A-H when higher surge robustness margin is needed beyond 1500 W or when existing DO-214AB footprint reuse is prioritized over height reduction. |
Compared with SMAJ45A-H and SMCJ45A-H, SMPC45ANHM3/H delivers identical electrical clamping performance in a lower-profile, AEC-Q101-qualified package optimized for automated placement and high-density automotive PCBs - making it the preferred choice where height, qualification, and manufacturability are jointly constrained.
Availability
SMPC45ANHM3/H is available at Aetrix Electronics and suitable for automotive power rail protection, CAN bus line hardening, and MOSFET gate safeguarding requiring stable component supply across multi-year vehicle production cycles.
Supply support for SMPC45ANHM3/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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SMPC series was developed specifically for AEC-Q101-compliant transient suppression in next-generation automotive electronics, emphasizing low profile, high surge capability, and seamless SMT integration in space-constrained modules.
FAQ
What is the exact breakdown voltage range for SMPC45ANHM3/H?
The SMPC45ANHM3/H has a guaranteed breakdown voltage (VBR) range of 50.0 V to 55.3 V at 1.0 mA test current, per Vishay Document 89116. This range ensures consistent avalanche initiation across temperature and process variation, and directly supports its 45.0 V stand-off rating. The SMPC45ANHM3/H is tested and binned to meet these limits before shipment.
Is SMPC45ANHM3/H suitable for bidirectional transient protection?
No, SMPC45ANHM3/H is strictly unidirectional and must be oriented with its cathode band toward the protected line. It does not conduct in reverse bias beyond leakage current and cannot suppress negative transients on positively biased lines. For bidirectional protection, a separate device such as SMPC45AT or paired unidirectional units are required - the SMPC45ANHM3/H itself provides no symmetrical clamping capability.
Does SMPC45ANHM3/H require heatsinking for 1500 W surge handling?
No external heatsink is required for single-pulse 1500 W events (10/1000 μs), as the SMPC45ANHM3/H relies on short-duration thermal mass and PCB copper for energy dissipation. However, its RθJA of 85–100 °C/W means repetitive surges or elevated ambient temperatures (>85 °C) demand careful layout - including ≥2 oz copper pour under the SMPC45ANHM3/H pad - to avoid exceeding 150 °C junction limit.
What does the "HM3/H" suffix indicate in SMPC45ANHM3/H?
The "HM3" denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction; "/H" specifies the 7-inch tape-and-reel packaging format with 1500 units per reel. This full suffix confirms the SMPC45ANHM3/H meets automotive reliability standards and ships in production-ready SMT packaging - distinct from industrial-grade "M3" variants or alternate reels like "/I" (6500 units).
Can SMPC45ANHM3/H be used on 24 V systems?
Yes, SMPC45ANHM3/H is commonly deployed on 24 V nominal systems (e.g., commercial vehicles, off-road equipment) where its 45.0 V VWM provides adequate margin above maximum steady-state rail voltage (typically ≤28 V), while its 72.7 V clamping voltage remains within safe operating limits for 36 V-rated downstream components. Its AEC-Q101 qualification further validates suitability for harsh 24 V automotive environments.
SMPC45ANHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- TO-277, 3-PowerDFN
- Series:
- TransZorb®, eSMP™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 20.6A
- 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)
SMPC45ANHM3/H FAQ
1.How can I place an order for SMPC45ANHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC45ANHM3/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 SMPC45ANHM3/H reliable?
The price and inventory of SMPC45ANHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC45ANHM3/H is usually 5 days.
3.What payment methods are accepted for SMPC45ANHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC45ANHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC45ANHM3/H?
SMPC45ANHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC45ANHM3/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 SMPC45ANHM3/H?
For technical support, including SMPC45ANHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC45ANHM3/H requirements.
6.How does Aetrix verify that SMPC45ANHM3/H is sourced from the original manufacturer or authorized distributors?
All SMPC45ANHM3/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 SMPC45ANHM3/H meets industry standards.
7.What is the process for return or replacement of SMPC45ANHM3/H?
All SMPC45ANHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMPC45ANHM3/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 SMPC45ANHM3/H part is unused and in its original packaging.
Return procedure for SMPC45ANHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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