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STMicroelectronics SMP30-68
- Part No.:
- SMP30-68
- Manufacturer:
- STMicroelectronics
- Category:
- Thyristors
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMP30-68.pdf
- Description:
- THYRISTOR 68V 70A DO-214AC
- Quantity:
- Payment:
- Shipping:
Inventory:913
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Product details
Overview
SMP30-68 from STMicroelectronics is a bidirectional Trisil™ thyristor surge protection device (SPD) designed for primary overvoltage clamping on telecom line interfaces. It features a 68 V stand-off voltage, 93 V dynamic breakover voltage, 30 A repetitive peak pulse current (10/1000 µs), ≤20 pF capacitance at 50 V, and 150 mA minimum holding current - enabling robust lightning and transient suppression in xDSL and T1/E1 line cards.
For engineers reviewing the SMP30-68 datasheet, SMP30-68 pinout, SMP30-68 application, or SMP30-68 equivalent, key selection criteria include fail-safe short-circuit behavior under overcurrent, UL497B and UL94 V0 certification, JEDEC DO-214AC (SMA) package compatibility, and compliance with GR-1089 Core, ITU-T K20/K21, and FCC Part 68 surge standards.
Technical Context
The SMP30-68 operates as a crowbar-type protector: it remains high-impedance below 68 V, triggers at 93 V (dynamic), latches on with ≥150 mA holding current, and sustains 30 A surges per 10/1000 µs waveform. Its low 20 pF capacitance minimizes signal distortion on analog/digital telecom lines.
Unlike MOVs or GDTs, it exhibits no aging drift and fails predictably into short-circuit mode. Thermal resistance is 120 °C/W (junction-to-ambient) with recommended FR4 footprint, supporting reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 68 V - maximum continuous reverse voltage before leakage exceeds 2 µA; sets DC operating margin for line interface protection. |
| Dynamic Breakover Voltage (VBO) | 93 V - voltage at which device triggers into conduction during fast transients; defines clamping threshold for 10/1000 µs surges. |
| Repetitive Peak Pulse Current (IPP) | 30 A @ 10/1000 µs - maximum surge current the device can withstand repeatedly without degradation; meets GR-1089 Core Level 1. |
| Junction Capacitance (C) | 20 pF @ 50 V, 1 MHz - ensures minimal loading on high-speed telecom signals (e.g., ADSL2+ up to 2.2 MHz). |
| Holding Current (IH) | 150 mA min - minimum current required to maintain latched-on state; guarantees self-sustaining crowbar action after trigger until fault clears. |
| Leakage Current (IRM) | 2 µA max @ 61 V - ultra-low standby leakage preserves line integrity and avoids false trips in low-power analog circuits. |
| Package | SMA (DO-214AC) - surface-mount, JEDEC-registered package with 120 °C/W thermal resistance; supports automated assembly and IPC-compliant reflow. |
Pinout & Package
SMP30-68 uses the SMA (DO-214AC) package: a two-terminal, symmetrical surface-mount case with cathode/anode terminals identified by polarity band marking. Dimensions: D = 2.25–2.90 mm, E = 4.80–5.35 mm, E1 = 3.95–4.60 mm, L = 0.75–1.50 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Current entry terminal during forward conduction | Connected to protected line side; forms bidirectional path with cathode for AC surge clamping. |
| Cathode (K) | Current exit terminal during forward conduction | Connected to ground or return path; polarity band on package identifies this terminal for correct PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional crowbar protection | Clamps both positive and negative transients symmetrically without external polarity control - eliminates need for back-to-back device pairing. |
| Fail-safe short-circuit failure mode | Guarantees continuity of protection even after end-of-life; prevents open-circuit failure that would leave downstream circuitry exposed. |
| UL497B and UL94 V0 certified | Validated for telecom surge protection per FCC Part 68 and fire-safety compliance - reduces system-level certification effort. |
| Low 20 pF capacitance at 50 V | Preserves signal integrity on broadband lines (e.g., VDSL2 up to 30 MHz) without requiring complex impedance matching or compensation. |
| JEDEC DO-214AC (SMA) package | Enables high-density PCB layout and compatibility with standard SMT pick-and-place and reflow processes - supports volume manufacturing. |
Applications
| DSL Line Cards | T1/E1 Interface Protection |
|---|---|
Use Scenario: Protecting copper-pair interfaces on DSLAM line cards against lightning-induced surges and AC power cross-talk. IC Role / Device Role / Timing Role: Primary crowbar protector placed between tip/ring and ground, triggered before downstream ICs experience overvoltage stress. Use Value: Withstands 30 A (10/1000 µs) surges while adding only 20 pF load - maintains ADSL2+ spectral mask compliance and avoids bit errors. | Use Scenario: Safeguarding T1/E1 framer ICs and transformer-coupled receivers in central office equipment. IC Role / Device Role / Timing Role: First-line transient suppressor on balanced differential pairs, clamping common-mode surges before isolation transformers. Use Value: UL497B listing and 93 V dynamic VBO ensure compliance with GR-1089 Core Level 1 - eliminates need for secondary protection stages. |
| Modem/Fax Terminals | ISDN BRI Interfaces |
Use Scenario: Integrated surge protection in residential VoIP gateways and analog fax modems connected to PSTN lines. IC Role / Device Role / Timing Role: Standalone overvoltage clamp on line-side RJ11 inputs, directly soldered across tip/ring pins. Use Value: Fail-safe short-circuit behavior prevents catastrophic open failure - maintains basic telephony function even after multiple surge events. | Use Scenario: Protecting ISDN Basic Rate Interface (BRI) S/T reference points in NT1 devices and terminal adapters. IC Role / Device Role / Timing Role: Bidirectional crowbar element placed before line interface transceivers to absorb 1500 V/10/700 µs ITU-T K20 surges. Use Value: 68 V VRM and 93 V VBO provide optimal margin above 48 V nominal line voltage - avoids nuisance triggering during normal ringing (90 Vpk). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar telecom surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SP1003-068 | 68 V standoff, 95 V VBO, 30 A IPP, same SMA package but higher 30 pF capacitance. | Higher capacitance may degrade >10 MHz signal fidelity; less suitable for VDSL2 or SHDSL. | Select if UL497B is not required and cost is prioritized over RF performance. |
| Bourns TISP4240M3JR-S | 68 V standoff, 100 V VBO, 40 A IPP, DO-214AA (SMB) package, 25 pF capacitance. | Larger SMB footprint requires PCB redesign; higher IPP supports harsher environments like remote DSLAM cabinets. | Select when higher surge margin is needed and board space allows SMB placement. |
Compared with SP1003-068 and TISP4240M3JR-S, SMP30-68 offers the lowest capacitance (20 pF) and UL497B certification - making it optimal for space-constrained, high-frequency telecom designs where signal integrity and regulatory compliance are critical.
Availability
SMP30-68 is available at Aetrix Electronics and suitable for DSL line cards, T1/E1 interface protection, and ISDN BRI terminals requiring stable component supply, long-lifecycle support, and consistent surge performance across production batches.
Supply support for SMP30-68 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering silicon solutions for automotive, industrial, and communications markets with emphasis on reliability and safety certification.
The SMP30 series belongs to ST's Trisil™ telecom protection portfolio, engineered specifically for fail-safe, bidirectional surge suppression on analog and digital telephony interfaces - targeting compliance with GR-1089, ITU-T K-series, and FCC Part 68.
FAQ
What is the fail-safe behavior of SMP30-68 during end-of-life?
SMP30-68 fails into a low-resistance short-circuit state when subjected to overstress beyond its I²t rating. This behavior is inherent to its thyristor structure and ensures continued protection of downstream circuitry - unlike MOVs, which degrade into high-resistance or open-circuit modes. The device remains functional as a permanent shunt until replaced.
Can SMP30-68 be used in DC power line protection?
No - SMP30-68 is optimized for AC telecom line protection and lacks sufficient holding current margin for sustained DC fault currents. Its 150 mA IH minimum assumes transient conduction followed by natural current zero-crossing. In pure DC systems, it may latch permanently and require external current limiting or fuse coordination to clear faults safely.
How does SMP30-68 compare to GDTs for telecom surge protection?
SMP30-68 offers faster response (<100 ns vs. ~100 ns–1 µs for GDTs), lower capacitance (20 pF vs. 0.5–2 pF but with higher electrode parasitics), and no follow-current limitation. Unlike GDTs, it does not require series impedance for arc quenching and integrates seamlessly with SMT assembly - though GDTs handle higher single-event energy (e.g., 10 kA 8/20 µs).
Is SMP30-68 RoHS and REACH compliant?
Yes - SMP30-68 carries STMicroelectronics' ECOPACK®2 designation, confirming lead-free termination, RoHS Directive 2011/65/EU compliance, and full REACH SVHC screening. The epoxy molding compound meets UL94 V0 flammability rating, and packaging uses tape-and-reel delivery with 5000-unit base quantity.
SMP30-68 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AC, SMA
- Series:
- SMP, TRISIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Breakover:
- 90V
- Voltage - Off State:
- 68V
- Voltage - On State:
- -
- Current - Peak Pulse (8/20µs):
- 70 A
- Current - Peak Pulse (10/1000µs):
- 30 A
- Current - Hold (Ih):
- 150 mA
- Number of Elements:
- 1
- Capacitance:
- 40pF
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMP30-68 FAQ
1.How can I place an order for SMP30-68 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMP30-68 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 SMP30-68 reliable?
The price and inventory of SMP30-68 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMP30-68 is usually 5 days.
3.What payment methods are accepted for SMP30-68?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMP30-68 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMP30-68?
SMP30-68 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMP30-68 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 SMP30-68?
For technical support, including SMP30-68 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMP30-68 requirements.
6.How does Aetrix verify that SMP30-68 is sourced from the original manufacturer or authorized distributors?
All SMP30-68 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 SMP30-68 meets industry standards.
7.What is the process for return or replacement of SMP30-68?
All SMP30-68 units undergo pre-shipment inspection (PSI). If there is an issue with SMP30-68, 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 SMP30-68 part is unused and in its original packaging.
Return procedure for SMP30-68:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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