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Vishay General Semiconductor - Diodes Division SMPC45ANHM3/I
- Part No.:
- SMPC45ANHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- TO-277, 3-PowerDFN
- Datasheet:
-
SMPC45ANHM3/I.pdf
- Description:
- TVS DIODE 45VWM 72.7VC TO277A
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMPC45ANHM3/I from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in the SMPC (TO-277A) package, rated for 45 V stand-off voltage (VWM), 50.0–55.3 V breakdown voltage (VBR), and 1500 W peak pulse power (PPPM) with 72.7 V clamping voltage at 20.6 A IPPM. It is AEC-Q101 qualified and designed for automotive-grade protection of MOSFETs, sensor signal lines, and ICs against inductive switching transients.
For engineers reviewing the SMPC45ANHM3/I datasheet, SMPC45ANHM3/I pinout, SMPC45ANHM3/I application, or SMPC45ANHM3/I equivalent, this page delivers verified electrical parameters, thermal derating behavior, JEDEC-compliant TO-277A mechanical data, and AEC-Q101 qualification status - all critical for automotive ECU, ADAS sensor interface, and industrial motor drive surge protection design.
Technical Context
The SMPC45ANHM3/I operates as a unidirectional avalanche diode, leveraging silicon p-n junction physics to clamp transient overvoltages above its VBR threshold while maintaining low leakage (<1.0 μA at VWM = 45 V). Its low incremental surge resistance and fast response time enable effective suppression of 10/1000 μs waveform surges without thermal runaway under repetitive stress.
Thermally, it features RθJA ≤ 100 °C/W (FR4, 2 oz copper) and RθJM ≤ 3 °C/W, enabling reliable operation up to TJ = 150 °C. The cathode-band-marked SMPC (TO-277A) package supports automated placement and meets MSL Level 1 (260 °C reflow peak), with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45.0 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 50.0 V / 55.3 V at IT = 1.0 mA - Ensures predictable turn-on within tight tolerance for precise system-level clamping design |
| VC at IPPM | 72.7 V at 20.6 A - Clamped voltage during 10/1000 μs surge defines maximum stress on downstream circuitry |
| PPPM | 1500 W - Peak transient energy handling capacity determines survivability against ISO 7637-2 Pulse 1/2a/5a events |
| TJ max | +150 °C - Enables use in under-hood automotive environments without derating penalties below ambient |
| Polarity | Unidirectional - Requires correct orientation relative to DC bias; cathode band denotes terminal 1 (cathode) |
| Package | SMPC (TO-277A) - 3-terminal SMD outline with dual anode/cathode configuration optimized for high-current PCB heat spreading |
Pinout & Package
SMPC45ANHM3/I uses the SMPC (TO-277A) package: a 3-terminal surface-mount outline per JEDEC TO-277A, with 1.1 mm typical height, UL 94 V-0 molding compound, and matte tin-plated leads. Polarity is marked by a cathode band denoting terminal 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (band side) | Cathode | Connected to protected line's reference (e.g., ground or low-side rail); conducts when transient exceeds VBR |
| Terminal 2 | Anode | Common anode node tied to system ground or return path; enables dual-anode layout for symmetric current sharing |
| Terminal 3 | Anode | Second anode terminal - electrically parallel to Terminal 2; used to reduce trace inductance and improve surge current distribution |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensors per stress test requirements |
| Low-profile SMPC package | 1.1 mm height enables compact placement near connectors or ICs without interfering with shield cans or mating components |
| 1500 W PPPM rating | Supports robust immunity to ISO 16750-2 load dump and ISO 7637-2 high-energy transients in 12 V systems |
| Halogen-free & RoHS-compliant | Meets automotive environmental compliance mandates (e.g., ELV Directive) without compromising surge performance |
| MSL Level 1 rating | Allows single-pass reflow at 260 °C peak without preconditioning - simplifies manufacturing and avoids moisture-related popcorning |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Interface |
|---|---|
Use Scenario: Protecting microcontroller I/O and CAN transceiver pins from alternator load dump and relay coil flyback in 12 V vehicle networks. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and chassis ground to clamp transients before they reach sensitive logic inputs. Use Value: With 72.7 V clamping at 20.6 A and 1500 W PPPM, SMPC45ANHM3/I limits stress on 5 V/3.3 V logic rails during ISO 7637-2 Pulse 5a events without sacrificing response speed. | Use Scenario: Shielding encoder feedback lines and gate driver inputs from commutation-induced spikes in BLDC motor inverters. IC Role / Device Role / Timing Role: Board-level transient suppressor mounted directly at connector entry points to prevent coupling into analog sensing paths. Use Value: Dual-anode SMPC (TO-277A) layout minimizes parasitic inductance, ensuring sub-nanosecond response preserves signal integrity on 100 kHz+ quadrature encoder signals. |
| ADAS Radar Sensor Front-End | Telecom Power Supply Input Stage |
Use Scenario: Safeguarding RF front-end LNA bias lines and digital control interfaces in 77 GHz radar modules exposed to ESD and board-level surges. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed adjacent to connector pins to shunt fast transients away from mmWave ICs. Use Value: 1.0 μA IR at 45 V VWM ensures negligible DC loading on precision bias networks, while AEC-Q101 qualification guarantees reliability across temperature cycling. | Use Scenario: Input-stage protection for AC/DC PSUs in base station equipment subjected to lightning-induced surges on -48 V telecom distribution lines. IC Role / Device Role / Timing Role: Primary surge suppression device located before bulk capacitance and upstream of active rectification stages. Use Value: 1500 W PPPM and 72.7 V VC allow SMPC45ANHM3/I to absorb IEEE C62.41 Category B/C surges without degradation, extending PSU MTBF in outdoor deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ45AHE3/5BT | DO-214AC (SMA) package; 45 V VWM; 1500 W PPPM; unidirectional; no AEC-Q101 qualification | Limited to industrial/commercial use; lower thermal mass reduces surge endurance under repeated pulses | Select when AEC-Q101 is not required and board space allows larger footprint |
| TPSMD45H | TO-277A package; 45 V VWM; 1500 W PPPM; AEC-Q101 qualified; slightly higher VC (75.1 V at 20.6 A) | Same automotive qualification level but marginally higher clamping voltage increases downstream component stress | Prefer when supply chain diversification is needed and 2.4 V higher VC is acceptable in system margin analysis |
Compared with SMAJ45AHE3/5BT and TPSMD45H, SMPC45ANHM3/I offers identical surge rating and automotive qualification in the same TO-277A footprint, but with the lowest clamping voltage (72.7 V) among the three - delivering tighter protection margins for 48 V nominal systems and reducing risk of latch-up in adjacent logic.
Availability
SMPC45ANHM3/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial motor drive development, and ADAS sensor interface protection requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMPC45ANHM3/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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and automotive-grade validation.
The SMPC TransZORB® series targets high-energy transient suppression in space-constrained, thermally demanding applications - specifically engineered for automotive powertrain, ADAS, and industrial automation where failure modes must be mitigated without increasing PCB area or thermal complexity.
FAQ
What is the clamping voltage of SMPC45ANHM3/I and how is it measured?
The SMPC45ANHM3/I has a maximum clamping voltage (VC) of 72.7 V, measured at peak pulse current (IPPM) of 20.6 A using a 10/1000 μs standard surge waveform per IEC 61000-4-5. This value represents the upper voltage limit imposed on protected circuitry during worst-case transient events and is guaranteed across the full operating temperature range of -55 °C to +150 °C. The SMPC45ANHM3/I achieves this clamping performance while maintaining low incremental surge resistance.
Is SMPC45ANHM3/I qualified for automotive applications?
Yes, SMPC45ANHM3/I is AEC-Q101 qualified - explicitly confirmed in Vishay's documentation for the SMPC22AN through SMPC85AN family. This qualification covers stress tests including HTGB, HTRB, TCT, and ESD per AEC-Q101 Rev D, validating suitability for under-hood and cabin electronics such as engine control units, body controllers, and radar sensor modules. The HM3 suffix denotes AEC-Q101 compliance.
What does the "I" suffix in SMPC45ANHM3/I indicate?
Per Vishay's ordering information table, the "I" suffix in SMPC45ANHM3/I specifies the preferred package code for 13-inch diameter plastic tape and reel delivery, with a base quantity of 6500 units per reel. It does not affect electrical or thermal specifications - all SMPC45ANHM3/I devices share identical VWM (45 V), VBR (50.0–55.3 V), PPPM (1500 W), and AEC-Q101 qualification regardless of reel size suffix (H or I).
How does the SMPC (TO-277A) package improve thermal performance over SMA or SMC packages?
The SMPC (TO-277A) package used by SMPC45ANHM3/I provides RθJM ≤ 3 °C/W (junction-to-mount) - significantly lower than SMA (RθJM ≈ 15–20 °C/W) due to its dual-anode construction and enhanced copper slug contact area. This enables more efficient heat transfer to the PCB ground plane, allowing sustained 1500 W surge dissipation without exceeding TJ = 150 °C, especially critical in high-density automotive layouts where airflow is limited.
Can SMPC45ANHM3/I be used in bidirectional configurations?
No, SMPC45ANHM3/I is strictly unidirectional - confirmed by its electrical characteristics table (IR specified only at VWM, no reverse standoff symmetry) and functional description ("Unidirection" feature bullet). For bidirectional protection, Vishay offers separate part numbers such as SMPC45ANHM3/I's counterpart in the bidirectional SMPCxxCA series. Using SMPC45ANHM3/I in reverse-biased configurations risks premature breakdown or parametric shift.
SMPC45ANHM3/I 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/I FAQ
1.How can I place an order for SMPC45ANHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMPC45ANHM3/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 SMPC45ANHM3/I reliable?
The price and inventory of SMPC45ANHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMPC45ANHM3/I is usually 5 days.
3.What payment methods are accepted for SMPC45ANHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMPC45ANHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMPC45ANHM3/I?
SMPC45ANHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMPC45ANHM3/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 SMPC45ANHM3/I?
For technical support, including SMPC45ANHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMPC45ANHM3/I requirements.
6.How does Aetrix verify that SMPC45ANHM3/I is sourced from the original manufacturer or authorized distributors?
All SMPC45ANHM3/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 SMPC45ANHM3/I meets industry standards.
7.What is the process for return or replacement of SMPC45ANHM3/I?
All SMPC45ANHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMPC45ANHM3/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 SMPC45ANHM3/I part is unused and in its original packaging.
Return procedure for SMPC45ANHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMPC45ANHM3/I Tags
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