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The PTF08A is an 8-pin surface-mounting relay socket manufactured by OMRON, designed specifically for the LY series general-purpose relays. It supports both DIN-rail mounting and screw mounting, and is widely used in industrial automation control systems.
- Core Specifications
| Item | Specification | Remarks |
| Model | OMRON PTF08A | Replacement: PTF08A‑E (with finger protection) |
| Compatible Relays | LY1, LY1‑D, LY1F, LY1N, LY2, LY2‑CR, LY2‑D, LY2F, LY2N and other 1‑/2‑pole LY series relays | Not suitable for MY series miniature power relays |
| Number of Pins | 8 pins | For 2‑pole relays (3 contacts + 2 coil pins per pole) |
| Rated Current | 10A/15A | Slight variations may exist; refer to OMRON official datasheet |
| Rated Voltage | 240VAC | Complies with industrial control standards |
| Wiring Terminals | Screw terminals | Terminal size: M3.5×8 |
| Mounting | DIN‑rail + screw mounting | Fits standard 35 mm DIN rail |
| Insulation | Insulation resistance ≥ 100 MΩ (at DC 500 V) | Ensures electrical safety |
| Dielectric strength: AC 2000 V | ||
| Operating Environment | Temp: −25 °C to +55 °C | For industrial environments |
| Humidity: 5%–85% RH (non‑condensing) | ||
| Weight | Approx. 55 g | Standard for 8‑pin version |
- Features & Advantages
- Dual mounting design: Supports fast DIN-rail installation and traditional screw fixing for various applications.
- High compatibility: Perfectly matches 1-/2-pole LY series relays; easy plug-and-play with simple clip locking and ejection.
- Safe and reliable: High dielectric strength (AC 2000 V) ensures safe electrical isolation.
- Durable structure: High-temperature resistant engineering plastic with high mechanical strength and long service life.
- Complete series: Also available in PTF11A (11-pin, 3-pole) and PTF14A (14-pin, 4-pole) to meet different pole requirements.
- Installation & Wiring Guide
- Mounting Methods
DIN-rail mounting: Clip directly onto standard 35 mm DIN rail without tools.
Screw mounting: Secure to panel with M3.5 screws; standard hole spacing.
- Wiring Precautions
Disconnect power before wiring to prevent electric shock.
Terminal tightening torque: 0.8–1.2 N·m to avoid damage.
Recommended wire: 0.5–2.5 mm² copper conductor.
Clearly distinguish contact terminals from coil terminals to avoid miswiring.
- Replacement Models & Compatibility
| Model | Features | Application |
| PTF08A | Standard, no finger protection | General industrial control |
| PTF08A‑E | With finger protection | Areas with frequent operator access |
| PYF08A | Socket for miniature power relays | For MY series only; not compatible with LY series |
| PTFZ‑08‑E | New replacement series | Compatible with LY series; upgraded specifications |
- Typical Applications
Industrial automation production line control circuits
Motor starting and protection circuits
Signal conversion in electrical control panels
Logic control for machine tools
Building electrical automation systems
- Purchasing & Usage Tips
- Authenticity identification: PTF08A is an original OMRON product. Counterfeits exist; purchase through authorized channels.
- Precautions: When used with relays, ensure contact rating matches load requirements.
- Maintenance: Regularly check terminal tightness to avoid loose connections.
OMRON PTF Series Relay Sockets-Full Models & Cross-Brand Order Codes
The PTF series is OMRON’s surface-mounting relay socket family designed for LY series general-purpose relays, also compatible with G3H/G3HD solid-state relays. They support DIN-rail/screw mounting and cover 2-pole (8-pin), 3-pole (11-pin), and 4-pole (14-pin) versions.
Below is the complete model list and cross-brand replacement options.
- Complete PTF Series Model List
1.1 Standard Screw Terminal Type (some discontinued, replaced by PTFZ)
| Model | Pins | Compatible Relays | Features | Status | Recommended Replacement |
| PTF08A | 8 | 2‑pole: LY1, LY1‑D, LY2, LY2‑CR, LY2‑D, etc. | No finger protection | Available | PTFZ‑08‑E |
| PTF08A‑E | 8 | Same as above | With finger protection | Discontinued | PTFZ‑08‑E |
| PTF11A | 11 | 3‑pole: LY3, etc. | No finger protection | Available | — |
| PTF14A | 14 | 4‑pole: LY4, etc. | No finger protection | Available | PTFZ‑14‑E |
| PTF14A‑E | 14 | Same as above | With finger protection | Discontinued | PTFZ‑14‑E |
1.2 New PTFZ Series (replaces old -E types, with finger protection)
| Model | Pins | Compatible Relays | Features |
| PTFZ‑08‑E | 8 | 2‑pole LY series | Finger protection, enhanced safety |
| PTFZ‑14‑E | 14 | 4‑pole LY series | Finger protection, enhanced safety |
1.3 PTF-PU Series (Push-In Plus, tool-free, wiring efficiency +60%)
| Model | Pins | Compatible Relays | Features |
| PTF‑08‑PU | 8 | 2‑pole LY series | No release lever, Push‑In Plus terminals |
| PTF‑08‑PU‑L | 8 | 2‑pole LY series | With release lever for easier operation |
| PTF‑14‑PU‑L | 14 | 4‑pole LY series | With release lever, Push‑In Plus terminals |
| PTF‑08‑PU‑L | 8 | For LY2‑CR only | Dedicated version |
1.4 Dimensions
| Model | Width | Height | Depth | Weight |
| PTF08A / PTFZ‑08‑E | 37 mm | 78.5 mm | 30 mm | Approx. 55 g |
| PTF11A | 37 mm | 78.5 mm | 30 mm | Approx. 65 g |
| PTF14A / PTFZ‑14‑E | 55.5 mm | 78.5 mm | 30 mm | Approx. 80 g |
- OMRON Internal Replacements
| Original | Status | Replacement | Reason |
| PTF08A‑E | Discontinued | PTFZ‑08‑E | Structural upgrade, safer finger protection |
| PTF14A‑E | Discontinued | PTFZ‑14‑E | Structural upgrade, safer finger protection |
| PTF08A | Available | PTFZ‑08‑E | Optional safety upgrade |
| PTF14A | Available | PTFZ‑14‑E | Optional safety upgrade |
| All standard PTF | Optional upgrade | PTF‑XX‑PU series | Push‑In terminals for faster, more reliable wiring |
- Cross-Brand Replacements (Major Industrial Brands)
3.1 Schneider Electric
| OMRON | Schneider Replacement | Compatible Relay | Pins | Mounting |
| PTF08A / PTFZ‑08‑E | RXZE1M2C | RXM2 (2‑pole) | 8 | DIN rail |
| PTF11A | RXZE1M3C | RXM3 (3‑pole) | 11 | DIN rail |
| PTF14A / PTFZ‑14‑E | RXZE1M4C | RXM4 (4‑pole) | 14 | DIN rail |
| PTF‑08‑PU | RXZE2M2C | RXM2 | 8 | DIN rail, spring terminal |
3.2 Siemens
| OMRON | Siemens Replacement | Compatible Relay | Features |
| PTF08A / PTFZ‑08‑E | 3RH2911‑1FA10 | 3RT20 (2‑pole) | 8‑pin, DIN rail |
| PTF11A | 3RH2911‑1FA20 | 3RT20 (3‑pole) | 11‑pin, DIN rail |
| PTF14A / PTFZ‑14‑E | 3RH2911‑1FA30 | 3RT20 (4‑pole) | 14‑pin, DIN rail |
3.3 Weidmüller
| OMRON | Weidmüller Replacement | Terminal Type | Rated Current |
| PTF08A | RCM 24008 | Screw | 10A / 250VAC |
| PTF08A‑E | RCM 24008‑S | Screw, protected | 10A / 250VAC |
| PTF‑08‑PU | RCM 24008‑P | Spring | 10A / 250VAC |
3.4 Phoenix Contact
| OMRON | Phoenix Contact Replacement | Features |
| PTF08A | RT 3081000 | 8‑pin, DIN rail, screw terminal |
| PTF14A | RT 3141000 | 14‑pin, DIN rail, screw terminal |
| PTF‑08‑PU | RT 3081010 | 8‑pin, DIN rail, spring terminal |
3.5 Chinese Brands (Cost-Effective)
| OMRON | CHINT | DELIXI | Cost Advantage |
| PTF08A | JZF08A | CDZ08A | ~1/3 of original |
| PTF14A | JZF14A | CDZ14A | ~1/3 of original |
- Selection & Replacement Guidelines
- Compatibility Rules
Industrial relay sockets follow international standard dimensions and are interchangeable across brands if:
Pin count matches relay pole number
Rated current (≥10A) meets load
Mounting (DIN-rail/screw) matches panel design
- Terminal Type Selection
Conventional screw: PTF08A / PTF11A / PTF14A-suitable for low-vibration environments
Finger protection: PTFZ series-suitable for areas with frequent access
Push-In Plus: PTF-PU series-ideal for mass wiring, high vibration resistance
- Discontinued Models
PTF08A-E / PTF14A-E are discontinued with limited stock.
Use PTFZ series as the preferred replacement.
> Note: PTF series sockets are rated 10A/250VAC, dielectric strength AC 2000V, operating temp −25 °C to +55 °C, suitable for 0.5–2.5 mm² copper wires.
