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NXP Semiconductors BT151-500C,127
- Part No.:
- BT151-500C,127
- Manufacturer:
- NXP Semiconductors
- Category:
- SCRs
- Package:
- TO-220-3
- Datasheet:
-
BT151-500C,127.pdf
- Description:
- NOW WEEN - BT151-500C - SILICON
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
BT151-500C,127 from NXP Semiconductors is a passivated plastic-encapsulated thyristor (SCR) in TO220AB package, rated for 500 V repetitive peak off-state voltage (VDRM/VRRM), 7.5 A average on-state current (IT(AV)), and 100 A non-repetitive peak on-state current (ITSM). It serves as a bidirectional AC power switch in phase-controlled motor drives and resistive heating circuits.
For engineers reviewing the BT151-500C,127 datasheet, BT151-500C,127 pinout, BT151-500C,127 application, or BT151-500C,127 equivalent, key selection criteria include gate trigger current (IGT ≤ 15 mA), holding current (IH ≤ 20 mA), thermal resistance junction-to-mounting-base (Rth j-mb ≤ 1.3 K/W), and dVD/dt capability (≥ 50 V/μs at 125 °C).
Technical Context
This thyristor operates as a latching unidirectional switch triggered by a gate pulse and commutated by natural current zero-crossing in AC line-frequency applications. Its static characteristics are specified across -40 °C to 125 °C junction temperature, with gate trigger voltage (VGT) ranging from 0.25 V to 1.5 V and on-state voltage (VT) of 1.44–1.75 V at 23 A.
Dynamically, it supports circuit-commutated turn-off time (tq) ≤ 70 μs under defined conditions and withstands critical dVD/dt up to 1000 V/μs when RGK = 100 Ω. The device requires external gate drive compliance with IGM ≤ 2 A, VGM ≤ 5 V, and PGM ≤ 5 W to ensure reliable triggering without damage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDRM / VRRM | 500 V - maximum repetitive blocking voltage before unintended turn-on; defines safe AC mains interface rating |
| IT(AV) | 7.5 A - average conduction current at Tmb ≤ 109 °C; sets continuous heater/motor load capacity |
| ITSM (10 ms) | 100 A - surge current handling for startup inrush or short-duration overload protection |
| IGT | 2–15 mA - gate current required to initiate conduction; determines driver transistor sizing |
| Rth j-mb | ≤ 1.3 K/W - thermal resistance from junction to mounting base; mandates heatsink design for >3 W dissipation |
| dVD/dt (125 °C) | ≥ 50 V/μs - minimum rate of rise of off-state voltage before false triggering; guides snubber design |
| VT (23 A) | 1.44–1.75 V - forward voltage drop defining conduction loss and thermal load at rated current |
Pinout & Package
BT151-500C,127 uses the SOT78 (TO220AB) plastic package with metal tab electrically connected to the anode. Mounting base temperature must not exceed 109 °C for full IT(AV) derating; net mass is 2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Main current return path; connects to load low-side or neutral in AC switching |
| 2 | Anode | Main current input; tied to AC line or hot side; electrically bonded to metal tab |
| 3 | Gate | Control terminal requiring ≥ 0.25 V and 2 mA to initiate latching conduction |
| Tab | Anode | Electrically common with Pin 2; provides mechanical mounting and thermal path to heatsink |
Key Features
| Feature | Design Value |
|---|---|
| Passivated silicon die | Enables stable long-term operation in humid or contaminated industrial environments |
| High dVD/dt immunity | Withstands ≥ 50 V/μs at 125 °C junction temperature without spurious turn-on |
| Low gate trigger threshold | IGT ≤ 15 mA at 25 °C enables direct drive from microcontroller GPIO via 470 Ω resistor |
| Thermal robustness | Rth j-mb ≤ 1.3 K/W allows 7.5 A continuous operation with modest heatsinking |
| Standard TO220AB footprint | Ensures compatibility with existing PCB layouts and heatsink clamps used for similar SCRs |
Applications
| AC Motor Speed Control | Resistive Heating Control |
|---|---|
Use Scenario: Phase-angle control of universal or induction motors in fans, pumps, and power tools. IC Role / Device Role / Timing Role: Thyristor acting as line-synchronized AC power switch, gated at variable delay after zero-crossing. Use Value: Enables smooth, efficient speed regulation without PWM losses; BT151-500C,127 handles 7.5 A average load current with <1.75 V conduction drop. | Use Scenario: Duty-cycle modulated heating in ovens, soldering irons, and industrial process heaters. IC Role / Device Role / Timing Role: Bidirectional AC switch controlling power delivery to resistive elements using burst-fire or phase-control. Use Value: Delivers precise thermal output with minimal EMI; BT151-500C,127 sustains 100 A surges during cold-start element inrush. |
| Light Dimming Systems | Static AC Power Switching |
Use Scenario: Leading-edge dimming of incandescent and halogen lamps in residential/commercial lighting. IC Role / Device Role / Timing Role: Main switching element triggered by TRIAC-compatible optocoupler or zero-crossing detector. Use Value: Provides flicker-free dimming with low gate drive demand; BT151-500C,127's 2–15 mA IGT ensures compatibility with standard MOC30xx drivers. | Use Scenario: Solid-state replacement for electromechanical contactors in HVAC, power distribution, and test equipment. IC Role / Device Role / Timing Role: High-reliability AC power switch activated by isolated logic signal for on/off control. Use Value: Eliminates contact wear and arcing; BT151-500C,127's 500 V blocking rating supports 240 VAC nominal systems with safety margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar thyristor switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STMicroelectronics TS103-500 | Same VDRM (500 V), IT(AV) = 8 A, Rth j-mb = 1.2 K/W, IGT max = 25 mA | Higher average current rating but higher gate drive requirement; slightly better thermal performance | Select when higher continuous current headroom is needed and gate driver can supply ≥25 mA |
| ON Semiconductor 2N6504 | VDRM = 400 V, IT(AV) = 8 A, ITSM = 120 A, IGT max = 30 mA, TO220 package | Lower blocking voltage limits use to 230 VAC systems; higher surge rating suits high-inrush loads | Select for cost-sensitive 230 VAC applications where 400 V margin suffices and surge robustness is prioritized |
Compared with BT151-500C,127, TS103-500 offers +0.5 A IT(AV) and marginally lower thermal resistance but demands nearly double the gate current; 2N6504 trades 100 V blocking headroom for higher surge tolerance and wider availability, making it suitable only in lower-voltage designs.
Availability
BT151-500C,127 is available at Aetrix Electronics and suitable for AC motor control, resistive heating, light dimming, and static power switching requiring stable component supply and long-lifecycle support.
Supply support for BT151-500C,127 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.
The BT151 series C thyristors were designed for cost-effective, high-reliability AC power control in industrial and domestic appliances-emphasizing thermal stability, gate sensitivity, and robust dVD/dt immunity in TO220 packaging.
FAQ
What is the maximum junction temperature for BT151-500C,127?
The absolute maximum operating junction temperature (Tj) for BT151-500C,127 is 125 °C. Operation beyond this limit risks permanent degradation of the silicon die and reduced reliability. Derating of IT(AV) begins above 109 °C mounting base temperature, per the datasheet's Fig.3 and limiting values table.
Is BT151-500C,127 compatible with zero-crossing TRIAC drivers like the MOC3041?
BT151-500C,127 is not a TRIAC and does not support true zero-crossing switching-it is an SCR requiring gate triggering only during positive half-cycles. While MOC3041 can drive BT151-500C,127's gate, the resulting circuit will conduct asymmetrically unless paired with a second SCR or configured in a back-to-back arrangement for full-wave control.
Does BT151-500C,127 require a heatsink in all applications?
Yes-BT151-500C,127 requires a heatsink whenever IT(AV) exceeds ~2.5 A at ambient temperatures above 40 °C, due to its Rth j-a of 60 K/W in free air. At full 7.5 A rating, the junction-to-mounting-base thermal resistance (Rth j-mb ≤ 1.3 K/W) mandates a properly mounted heatsink to maintain Tj ≤ 125 °C.
What is the gate trigger voltage range for BT151-500C,127?
The gate trigger voltage (VGT) for BT151-500C,127 ranges from 0.25 V to 1.5 V, depending on junction temperature and test conditions. At 25 °C, VGT is typically 0.6–1.5 V with 12 V anode-cathode voltage and 0.1 A load current; at 125 °C, minimum VGT drops to 0.25 V, improving low-power gate drive efficiency.
Can BT151-500C,127 be used in DC circuits?
BT151-500C,127 can conduct DC current once triggered, but cannot be turned off by gate control-it relies on current interruption (e.g., via external switch or load removal) for commutation. For DC switching, a forced-commutated circuit or alternative device like a MOSFET or IGBT is recommended instead of BT151-500C,127.
BT151-500C,127 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Off State:
- 500 V
- Voltage - Gate Trigger (Vgt) (Max):
- 1.5 V
- Current - Gate Trigger (Igt) (Max):
- 15 mA
- Voltage - On State (Vtm) (Max):
- 1.75 V
- Current - On State (It (AV)) (Max):
- 7.5 A
- Current - On State (It (RMS)) (Max):
- 12 A
- Current - Hold (Ih) (Max):
- 20 mA
- Current - Off State (Max):
- 500 µA
- Current - Non Rep. Surge 50, 60Hz (Itsm):
- 100A, 110A
- SCR Type:
- Standard Recovery
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AB
BT151-500C,127 FAQ
1.How can I place an order for BT151-500C,127 through Aetrix?
Please submit a Request for Quotation (RFQ) for BT151-500C,127 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 BT151-500C,127 reliable?
The price and inventory of BT151-500C,127 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BT151-500C,127 is usually 5 days.
3.What payment methods are accepted for BT151-500C,127?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BT151-500C,127 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BT151-500C,127?
BT151-500C,127 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BT151-500C,127 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 BT151-500C,127?
For technical support, including BT151-500C,127 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BT151-500C,127 requirements.
6.How does Aetrix verify that BT151-500C,127 is sourced from the original manufacturer or authorized distributors?
All BT151-500C,127 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 BT151-500C,127 meets industry standards.
7.What is the process for return or replacement of BT151-500C,127?
All BT151-500C,127 units undergo pre-shipment inspection (PSI). If there is an issue with BT151-500C,127, 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 BT151-500C,127 part is unused and in its original packaging.
Return procedure for BT151-500C,127:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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